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Pinecone 48

83641411

10.1007/s11113-016-9405-1

South Korea was among the first countries to report both an abnormally high sex ratio at birth (SRB) and its subsequent normalization. We examine the role of son preference in driving fertility intentions during a period of declining SRB and consider the contribution of individual characteristics and broader social context to explaining changes in intentions. We employ data from the National Survey on Fertility, Family Health and Welfare that span 1991–2012. We find that reported son preference declined to a great extent but remained substantial by the end of the observation period, and that the intention to have a third child still differed by sex of existing children. Change in individual-level factors does not explain the decline in son preference, suggesting that broad social changes were also important. This study provides a better understanding of how son preference evolves in the post-transitional context of very low fertility

Old habits die hard? Lingering son preference in an era of normalizing sex ratios at birth in South Korea

old habits die hard? lingering son preference in an era of normalizing sex ratios at birth in south korea

korea abnormally birth normalization. examine preference driving fertility intentions declining broader explaining intentions. employ fertility welfare span preference declined great remained substantial intention differed children. decline preference broad important. preference evolves transitional fertility

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95876318

10.1080/19415257.2013.823099

Does teacher professional development make a difference? How do we know? While researchers and policy makers acknowledge that teacher professional development (PD) needs to be assessed and evaluated there is often little clarity as to how this can be achieved. Evaluation of teacher PD has been described as the weak link in the PD chain despite it being linked with improved PD experiences and pupil outcomes. This may be due to a lack of skills and tools to carry out such evaluations or indeed it may be linked to how PD is conceptualised. This article explores extant literature and models of evaluation, revealing gaps in existing evaluation frameworks resulting in the development of a provisional PD evaluation framework for use in a study which set out to formally evaluate the impact of a PD initiative on teachers’ professional learning in five urban primary disadvantaged schools in the Republic of Ireland. Following application within this study the framework was critiqued and revised resulting in a new PD Impact Evaluation Framework which has subsequently been further tested to add to its robustness and may support teachers, researchers and policy makers to carry out systematic and focused evaluations of teacher PD

Evaluating the impact of teacher professional development: an evidence-based framework

evaluating the impact of teacher professional development: an evidence-based framework

teacher professional researchers makers acknowledge teacher professional clarity achieved. teacher experiences pupil outcomes. skills carry evaluations conceptualised. explores extant revealing gaps frameworks provisional formally initiative teachers’ professional disadvantaged schools republic ireland. critiqued revised subsequently robustness teachers researchers makers carry focused evaluations teacher

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11250911

10.1016/j.meatsci.2008.02.001

In a previous study, we showed that coagulase positive staphylococci (CPS), which are often used as indicators for S. aureus, are frequently found on pig carcasses at slaughter. Further characterization of the CPS identified only a minor part as S. aureus. Selected non-S. aureus strains were all identified as S. hyicus, However, two studies have described also in this species strains that produce staphylococcal enterotoxins. The aim of the present study was therefore to further characterize such coagulase positive S. hyicus strains isolated from pig carcasses and to assess the results also in view of their food safety relevance. A total of 189 S. hyicus strains from abattoirs A (n=36) and B (n=153) were characterized. Phenotypically, 98.9% showed non-pigmented colonies, 99.5% no haemolysis and 67.7% were egg yolk-positive. DNase activity was found in all but one isolate. Only five of the 189 strains were resistant to the antimicrobials tested. One strain harboured the mecA gene. Exfoliative toxin genes were detected in 31 (16.4%) strains. Six strains harboured the exhA and 25 strains the exhD gene. S. aureus Enterotoxin (SE) genes were detected in none of the strains. \ud The PFGE genotyping results show only a limited number of clusters. Cluster I included more than 50% of the strains. The fact that similar or closely related PFGE patterns of S. hyicus can be found on carcasses after bleeding in both abattoirs indicates the occurrence of widespread strains in the Swiss pig population. Moreover, the genotyping results revealed a remarkable homogeneity in S. hyicus strains isolated from different slaughter process stages in abattoir B, which could indicate a recontamination problem with persisting strains

Characteristics of Staphylococcus Hyicus strains isolated from pig carcasses in two different slaughterhouses

characteristics of staphylococcus hyicus strains isolated from pig carcasses in two different slaughterhouses

coagulase staphylococci indicators aureus frequently carcasses slaughter. minor aureus. aureus hyicus staphylococcal enterotoxins. characterize coagulase hyicus carcasses relevance. hyicus abattoirs characterized. phenotypically pigmented colonies haemolysis yolk positive. dnase isolate. resistant antimicrobials tested. harboured meca gene. exfoliative toxin strains. harboured exha exhd gene. aureus enterotoxin none strains. pfge genotyping clusters. strains. closely pfge hyicus carcasses bleeding abattoirs occurrence widespread swiss population. genotyping remarkable homogeneity hyicus slaughter abattoir recontamination persisting

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11309052

10.1007/978-3-540-74272-2_47

In this paper, we propose a new manifold representation capable of being applied for visual speech recognition. In this regard, the real time input video data is compressed using Principal Component Analysis (PCA) and the low-dimensional points calculated for each frame define the manifolds. Since the number of frames that from the video sequence is dependent on the word complexity, in order to use these manifolds for visual speech classification it is required to re-sample them into a fixed number of keypoints that are used as input for classification. In this paper two classification schemes, namely the k Nearest Neighbour (kNN) algorithm that is used in conjunction with the two-stage PCA and Hidden-Markov-Model (HMM) classifier are evaluated. The classification results for a group of English words indicate that the proposed approach is able to produce accurate classification results

A new manifold representation for visual speech recognition

a new manifold representation for visual speech recognition

propose manifold capable speech recognition. regard video compressed principal manifolds. frames video word manifolds speech keypoints classification. schemes nearest neighbour conjunction hidden markov classifier evaluated. english

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11990141

10.1007/978-3-642-04447-2_69

This paper describes the participation of the MIRACLE team at the ImageCLEF Photographic Retrieval task of CLEF 2008. We succeeded in submitting 41 runs. Obtained results from text-based retrieval are better than content-based as previous experiments in the MIRACLE team campaigns [5, 6] using different software. Our main aim was to experiment with several merging approaches to fuse text-based retrieval and content-based retrieval results, and it happened that we improve the text-based baseline when applying one of the three merging algorithms, although visual results are lower than textual ones

Some Results Using Different Approaches to Merge Visual and Text-Based Features in CLEF’08 Photo Collection

some results using different approaches to merge visual and text-based features in clef’08 photo collection

describes participation miracle team imageclef photographic retrieval clef succeeded submitting runs. retrieval miracle team campaigns software. merging fuse retrieval retrieval happened merging textual

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11991777

10.1016/j.foreco.2008.06.048

Understanding fire is essential to improving forest management strategies. More specifically, an accurate knowledge of the spatial distribution of fuels is critical when analyzing, modelling and predicting fire behaviour. First, we review the main concepts and terminology associated with forest fuels and a number of fuel type classifications. Second, we summarize the main techniques employed to map fuel types starting with the most traditional approaches, such as field work, aerial photo interpretation or ecological modelling. We pay special attention to more contemporary techniques, which involve the use of remote sensing systems. In general, remote sensing systems are low-priced, can be regularly updated and are less time-consuming than traditional methods, but they are still facing important limitations. Recent work has shown that the integration of different sources of information andmethods in a complementary way helps to overcome most of these limitations. Further research is encouraged to develop novel and enhanced remote sensing techniques

Fire models and methods to map fuel types: The role of remote sensing.

fire models and methods to map fuel types: the role of remote sensing.

fire improving forest strategies. fuels analyzing predicting fire behaviour. concepts terminology forest fuels fuel classifications. summarize fuel traditional aerial photo ecological modelling. contemporary involve remote sensing systems. remote sensing priced regularly updated consuming traditional facing limitations. andmethods complementary helps overcome limitations. encouraged remote sensing

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11991871

10.1016/j.ijheatmasstransfer.2007.06.009

This study is motivated by the need to devise means to enhance heat transfer in configurations, like the back step, that appear in certain types of MEMS that involve fluid flow and that are not very efficient from the thermal transfer point of view. In particular, the work described in this paper studies the effect that a prescribed flow pulsation (defined by two control parameters: velocity pulsation frequency and pressure gradient amplitude at the inlet section) has on the heat transfer rate behind a backward facing step in the unsteady laminar 2-D regime. The working fluid that we have considered is water with temperature dependent viscosity and thermal conductivity. We have found that, for inlet pressure gradients that avoid flow reversal at both the upstream and downstream boundary conditions, the timeaveraged Nusselt number behind the step depends on the two above mentioned control parameters and is always larger than in the steady-state case. At Reynolds 100 and pulsating at the resonance frequency, the maximum time-averaged Nusselt number in the horizontal wall region located behind the step whose length is four times the step height is 55% larger than in the steady-case. Away from the resonant pulsation frequency, the time-averaged Nusselt number smoothly decreases and approaches its steady-state value

Laminar heat transfer enhancement downstream of a backward facing step by using a pulsating flow

laminar heat transfer enhancement downstream of a backward facing step by using a pulsating flow

motivated devise enhance configurations mems involve view. prescribed pulsation pulsation inlet behind backward facing unsteady laminar regime. viscosity conductivity. inlet gradients avoid reversal upstream downstream timeaveraged nusselt behind steady case. reynolds pulsating averaged nusselt behind steady case. away resonant pulsation averaged nusselt smoothly steady

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11994169

10.1016/j.cej.2009.08.020

The role of iron on the degradation of different organic compounds, differing in their structure (aliphatic versus aromatic) and iron complex formation capacity, by conventional and photo-Fenton processes was investigated. Results show that these chemical characteristics can affect the degree of treatment in terms of COD and TOC removals. While aromatics exhibited a fast and great reduction in the COD by the conventional Fenton process, aliphatic compounds, apart from acetic acid, required the presence of UV light to enhance treatment results. EDTA and oxalic acid responded very positively to UV irradiation in both COD removal and mineralization, reaching the highest values showed by aromatics; and results depended on the intensity of the UV light applied. Phenol and 4-nitrophenol responded favourably to UV irradiation in terms of mineralization and slightly in COD removal. Reductions in the COD were almost total (95.99%), while only an 80% of reduction in the TOC was achieved, for the best photo-Fenton treatment of oxalic acid, phenol and nitrophenol. 60% COD and 40% TOC removals were achieved correspondingly in the case of EDTA. Acetic acid showed almost no mineralization and low COD removal (≈20%) when treated by a conventional Fenton process; and did not enhanced results when assisting the treatment with UV light. Photo-regeneration of ferrous ion and photo-decarboxylation of iron carboxylates are assessed in the framework of these results

The role of iron on the degradation and mineralization or organic compounds using conventional Fenton and photo-Fenton processes

the role of iron on the degradation and mineralization or organic compounds using conventional fenton and photo-fenton processes

iron degradation differing aliphatic aromatic iron photo fenton investigated. removals. aromatics exhibited great fenton aliphatic apart acetic enhance results. edta oxalic responded positively irradiation removal mineralization reaching aromatics depended applied. phenol nitrophenol responded favourably irradiation mineralization removal. reductions photo fenton oxalic phenol nitrophenol. removals correspondingly edta. acetic mineralization removal fenton assisting light. photo regeneration ferrous photo decarboxylation iron carboxylates

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11997665

10.1007/s00422-010-0402-x

Foraging robots involved in a search and retrieval task may create paths to navigate faster in their environment. In this context, a swarm of robots that has found several resources and created different paths may benefit strongly from path selection. Path selection enhances the foraging behavior by allowing the swarm to focus on the most profitable resource with the possibility for unused robots to stop participating in the path maintenance and to switch to another task. In order to achieve path selection, we implement virtual ants that lay artificial pheromone inside a network of robots. Virtual ants are local messages transmitted by robots; they travel along chains of robots and deposit artificial pheromone on the robots that are literally forming the chain and indicating the path. The concentration of artificial pheromone on the robots allows them to decide whether they are part of a selected path. We parameterize the mechanism with a mathematical model and provide an experimental validation using a swarm of 20 real robots. We show that our mechanism favors the selection of the closest resource is able to select a new path if a selected resource becomes unavailable and selects a newly detected and better resource when possible. As robots use very simple messages and behaviors, the system would be particularly well suited for swarms of microrobots with minimal abilitie

Artificial Pheromone for Path Selection by a Foraging Swarm of Robots

artificial pheromone for path selection by a foraging swarm of robots

foraging robots retrieval create paths navigate faster environment. swarm robots created paths benefit selection. enhances foraging allowing swarm profitable resource unused robots stop participating maintenance switch task. implement virtual ants artificial pheromone robots. virtual ants messages transmitted robots travel chains robots deposit artificial pheromone robots literally forming path. artificial pheromone robots decide path. parameterize mathematical validation swarm robots. favors closest resource select resource unavailable selects newly resource possible. robots messages behaviors suited swarms microrobots abilitie

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12021620

10.1016/j.jmateco.2009.12.004

We analyze the possibility of the simultaneous presence of three key features in price-taking credit markets: infinity horizon, collateralized credit operations and effective additional enforcement mechanisms, i.e. those implying payments besides the value of the collateral guarantees. We show that these additional mechanisms, instead of strengthening, actually weaken the restrictions that collateral places on borrowing. In fact, when collateral requirements are not large enough in relation to the effectiveness of the additional mechanisms, lenders anticipate total payments exceeding the value of the collateral requirements. Thus, by non-arbitrage, they lend more than the value of these guarantees. In turn, in the absence of other market frictions such as borrowing constraints, agents may indefinitely postpone their debts, implying the collapse of the agent's maximization problem and of such credit markets.

The impossibility of effective enforcement mechanisms in collateralized credit markets

the impossibility of effective enforcement mechanisms in collateralized credit markets

analyze simultaneous credit markets infinity horizon collateralized credit operations enforcement i.e. implying payments besides collateral guarantees. strengthening weaken restrictions collateral places borrowing. collateral effectiveness lenders anticipate payments exceeding collateral requirements. arbitrage lend guarantees. frictions borrowing indefinitely postpone debts implying collapse agent maximization credit markets.

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12027563

10.1007/s12232-011-0135-8

This paper explores the relationship of social capital to self-rated health status in Japan, and how this is affected by the labor market. Data of 3075 adult participants in the 2000 Social Policy and Social Consciousness (SPSC) survey were used. Controlling for endogenous bias, the main finding is that social capital has a significant positive influence on health status for people without a job but not for those with. This empirical study provides evidence that people without a job can afford to allocate time to accumulate social capital and thereby improve their health status.

Differences in the effect of social capital on health status between workers and non-workers

differences in the effect of social capital on health status between workers and non-workers

explores capital rated labor market. consciousness spsc used. controlling endogenous capital with. afford allocate accumulate capital thereby status.

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12034404

10.1016/j.jedc.2009.12.002

This paper investigates the distribution of delays during a repeatedly occurring demand peak in a congested facility with random capacity and demand, such as an airport or an urban road. Congestion is described in the form of a dynamic queue using the Vickrey bottleneck model and assuming Nash equilibrium in arrival times. The paper shows that the expected delay and the variance of delay vary differently over time during the peak and must hence be considered separately. The paper gives some characterization of how the expected delay and the variance of delay are related, which explain the looping phenomenon that has now been observed a number of times. Empirical illustration is provided.

On the relation between the mean and variance of delay in dynamic queues with random capacity and demand

on the relation between the mean and variance of delay in dynamic queues with random capacity and demand

investigates delays repeatedly occurring congested facility airport road. congestion queue vickrey bottleneck nash arrival times. delay delay vary differently separately. delay delay looping phenomenon times. illustration provided.

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128533358

10.1007/978-3-662-53806-7_3

We present the application of a cyber-physical system for inprocess\ud quality control based on the visual inspection of a laser surface\ud heat treatment process. To do this, we propose a classification framework\ud that detects anomalies in recorded video sequences that have been preprocessed\ud using a clustering-based method for feature subset selection.\ud One peculiarity of the classification task is that there are no examples\ud with errors, since major irregularities seldom occur in efficient industrial\ud processes. Additionally, the parts to be processed are expensive so the\ud sample size is small. The proposed framework uses anomaly detection,\ud cross-validation and sampling techniques to deal with these issues. Regarding\ud anomaly detection, dynamic Bayesian networks (DBNs) are used\ud to represent the temporal characteristics of the normal process. Experiments\ud are conducted with two diferent types of DBN structure learning\ud algorithms, and classification performance is assessed on both anomalyfree\ud examples and sequences with anomalies simulated by experts

Dynamic Bayesian network-based anomaly detection for in-process visual inspection of laser surface heat treatment

dynamic bayesian network-based anomaly detection for in-process visual inspection of laser surface heat treatment

cyber inprocess inspection process. propose detects anomalies video preprocessed clustering selection. peculiarity irregularities seldom industrial processes. additionally processed expensive small. anomaly validation deal issues. anomaly bayesian dbns process. diferent anomalyfree anomalies experts

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144013786

10.1023/A:1007644128886

The AMPA receptors for glutamate are oligomeric structures that mediate fast excitatory responses in the central nervous system. Phosphorylation of AMPA receptors is an important mechanism for short-term modulation of their function, and is thought to play an important role in synaptic plasticity in different brain regions. Recent studies have shown that phosphorylation of AMPA receptors by cAMP-dependent protein kinase (PKA) and Ca2+ - and calmodulin-dependent protein kinase II (CaMKII) potentiates their activity, but phosphorylation of the receptor subunits may also affect their interaction with intracellular proteins, and their expression at the plasma membrane. Phosphorylation of AMPA receptor subunits has also been investigated in relation to processes of synaptic plasticity. This review focuses on recent advances in understanding the molecular mechanisms of regulation of AMPA receptors, and their implications in synaptic plasticity.http://dx.doi.org/10.1023/A:100764412888

Regulation of AMPA Receptors by Phosphorylation

regulation of ampa receptors by phosphorylation

ampa receptors glutamate oligomeric mediate excitatory nervous system. phosphorylation ampa receptors modulation thought synaptic plasticity regions. phosphorylation ampa receptors camp calmodulin camkii potentiates phosphorylation subunits intracellular membrane. phosphorylation ampa subunits synaptic plasticity. focuses advances ampa receptors synaptic plasticity.

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144013941

10.1007/s10989-005-9010-3

The overall objective of our research is to produce polyanion/chitosan nanoparticulate oral delivery systems for insulin. Specific objectives of the present study were to study dextran sulfate or alginate complexation with chitosan on mean particle size, insulin association efficiency, loading capacity and release profile. Nanoparticles were formed by ionotropic complexation and coacervation between polyanions (dextran sulfate and alginate) and chitosan. Diameter was evaluated with photon correlation spectroscopy, polymer interaction was confirmed by DSC and FTIR and particle morphology was assessed by SEM and TEM. Mean nanoparticle diameter ranged from 423 to 850 nm, insulin association efficiency from 63 to 94% and loading capacity from 5 to 13%. Dextran sulfate provided highest insulin association efficiency and retention of insulin in gastric simulated conditions. These nanoparticle systems show promise as insulin and potentially other therapeutic polypeptides carriers.http://dx.doi.org/10.1007/s10989-005-9010-

Development and Comparison of Different Nanoparticulate Polyelectrolyte Complexes as Insulin Carriers

development and comparison of different nanoparticulate polyelectrolyte complexes as insulin carriers

polyanion chitosan nanoparticulate oral delivery insulin. objectives dextran sulfate alginate complexation chitosan insulin loading profile. nanoparticles ionotropic complexation coacervation polyanions dextran sulfate alginate chitosan. spectroscopy polymer confirmed ftir morphology tem. nanoparticle ranged insulin loading dextran sulfate insulin retention insulin gastric conditions. nanoparticle promise insulin potentially therapeutic polypeptides carriers.

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144013949

10.1007/s00216-005-0051-4

Abstract Ochratoxin A (OTA) is a secondary fungal metabolite produced by several moulds, mainly by Aspergillus ochraceus and by Penicillium verrucosum, that occurs in meat products. The aim of this work was to optimize an efficient extraction procedure for the determination of OTA in muscle tissue in order to assess its occurrence in meat samples. Three different apparatus, a Waring blender, a switching apparatus, and an ultrasonic processor, were evaluated to verify the efficiency of extraction. The analytical methods proposed involve the extraction with chloroform-orthophosphoric acid, cleanup through an immunoaffinity column, high-performance liquid chromatography/fluorescence detection for separation and identification of OTA, and confirmation with liquid chromatography/FD after methylation of OTA in muscle tissue. The limit of quantification of the proposed method was 0.04 µg kg-1. Recoveries of OTA, using switching apparatus, ranged from 90.3 to 103.2% for chicken muscle spiked at 2.4 and 0.48 µg kg-1, respectively, with a within-day relative standard deviation of 17 and 15.3%. The proposed method was applied to 38 chicken, swine, and turkey muscle samples and the presence of OTA was confirmed in five samples. Finally, the estimated daily intake of OTA in this study was between 23 pg kg-1 body weight per day for swine samples and 18 pg kg-1 body weight per day for turkey samples.http://dx.doi.org/10.1007/s00216-005-0051-

A comparative study of extraction apparatus in HPLC analysis of ochratoxin A in muscle

a comparative study of extraction apparatus in hplc analysis of ochratoxin a in muscle

ochratoxin fungal metabolite moulds aspergillus ochraceus penicillium verrucosum meat products. optimize extraction occurrence meat samples. apparatus waring blender switching apparatus ultrasonic processor verify extraction. involve extraction chloroform orthophosphoric cleanup immunoaffinity chromatography fluorescence confirmation chromatography methylation tissue. quantification recoveries switching apparatus ranged chicken spiked chicken swine turkey confirmed samples. intake swine turkey samples.

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147601109

10.1007/978-3-642-23160-5

Accurate high-coverage translation is a vital component of\ud reliable cross language information retrieval (CLIR) systems. This is particularly true for retrieval from archives such as Digital Libraries which are often specific to certain domains. While general machine translation (MT) has been shown to be effective for CLIR tasks in laboratory information retrieval evaluation tasks, it is generally not well suited to specialized situations where domain-specific translations are required. We demonstrate that effective query translation in the domain of cultural heritage (CH) can be achieved using a hybrid translation method which augments a standard MT system with domain-specific phrase dictionaries automatically mined from Wikipedia. We further describe the use of these components in a domain-specific interactive query translation service. The interactive system selects the hybrid translation by default, with other possible translations being offered to the user interactively to enable them to select alternative or additional translation(s). The objective of this interactive service is to provide user control of translation while maximising translation accuracy and minimizing the translation effort of the user. Experiments using our hybrid translation system with sample query logs from users of CH websites demonstrate a large improvement in the accuracy of domain-specific phrase detection and translation

Hybrid and interactive domain-specific translation for multilingual access to digital libraries

hybrid and interactive domain-specific translation for multilingual access to digital libraries

coverage translation vital reliable retrieval clir systems. retrieval archives digital libraries domains. machine translation clir tasks retrieval tasks suited specialized situations translations required. query translation cultural heritage hybrid translation augments phrase dictionaries automatically mined wikipedia. interactive query translation service. interactive selects hybrid translation default translations offered interactively enable select translation interactive translation maximising translation minimizing translation effort user. hybrid translation query logs websites phrase translation

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148653397

10.1007/978-3-540-70540-6_117

The design of a user interface usable by blind people sets specific usability requirements that are unnecessary for sighted users. These requirements focus on task adequacy, dimensional trade-off, behaviour equivalence, semantic loss avoidance and device-independency. Consequently, the development of human-computer interfaces (HCI) that are based on task, domain, dialog, presentation, platform and user models has to be modified to take into account these requirements. This paper presents a user interface model for blind people, which incorporates these usability requirements into the above HCI models. A frame-work implementing the model has been developed and implemented in an electronic speaking bilingual software environment for blind or visually impaired people and in an educational system for children with special educational needs

User-Interface Modelling for Blind Users

user-interface modelling for blind users

usable blind usability unnecessary sighted users. adequacy trade equivalence semantic avoidance independency. interfaces dialog presentation platform requirements. presents blind incorporates usability models. implementing implemented speaking bilingual blind visually impaired educational educational

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148656131

10.1063/1.868342

Linear oscillations of axisymmetric capillary bridges are analyzed for large values of the modified Reynolds number C−1. There are two kinds of oscillating modes. For nearly inviscid modes (the flow being potential, except in boundary layers), it is seen that the damping rate −ΩR and the frequency ΩI are of the form ΩR=ω1C1/2+ω2C+O(C3/2) and ΩI=ω0+ω1C1/2+O(C3/2), where the coefficients ω0≳0, ω1<0, and ω2<0 depend on the aspect ratio of the bridge and the mode being excited. This result compares well with numerical results if C≲0.01, while the leading term in the expansion of the damping rate (that was already known) gives a bad approximation, except for unrealistically large values of the modified Reynolds number (C≲10−6). Viscous modes (involving a nonvanishing vorticity distribution everywhere in the liquid bridge), providing damping rates of the order of C, are also considered

Linear oscillations of weakly dissipative axisymmetric liquid bridges

linear oscillations of weakly dissipative axisymmetric liquid bridges

oscillations axisymmetric capillary bridges reynolds kinds oscillating modes. nearly inviscid damping aspect bridge excited. compares damping unrealistically reynolds viscous involving nonvanishing vorticity everywhere bridge damping

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148658141

10.1016/j.ecoinf.2010.03.003

This paper presents a model of a population of error-prone self-replicative species (replicators) that interact with its environment. The population evolves by natural selection in an environment whose change is caused by the evolutionary process itself. For simplicity, the environment is described by a single scalar factor, i.e. its temperature. The formal formulation of the model extends two basic models of Ecology and Evolutionary Biology, namely, Daisyworld and Quasispecies models. It is also assumed that the environment can also change due to external perturbations that are summed up as an external noise. Unlike previous models, the population size self-regulates, so no ad hoc population constraints are involved. When species replication is error-free, i.e. without mutation, the system dynamics can be described by an (n + 1)-dimensional system of differential equations, one for each of the species initially present in the system, and another for the evolution of the environment temperature. Analytical results can be obtained straightforwardly in low-dimensional cases. In these examples, we show the stabilizing effect of thermal white noise on the system behavior. The error-prone self-replication, i.e. with mutation, is studied computationally. We assume that species can mutate two independent parameters: its optimal growth temperature and its influence on the environment temperature. For different mutation rates the system exhibits a large variety of behaviors. In particular, we show that a quasispecies distribution with an internal sub-distribution appears, facilitating species adaptation to new environments. Finally, this ecologically inspired evolutionary model is applied to study the origin and evolution of public opinion

Evolutionary Daisyworld models: A new approach to studying complex adaptive systems

evolutionary daisyworld models: a new approach to studying complex adaptive systems

presents prone replicative replicators interact environment. evolves evolutionary itself. simplicity i.e. temperature. formal formulation extends ecology evolutionary daisyworld quasispecies models. perturbations summed noise. unlike regulates involved. replication i.e. mutation initially temperature. straightforwardly cases. stabilizing behavior. prone replication i.e. mutation computationally. mutate temperature. mutation exhibits behaviors. quasispecies facilitating adaptation environments. ecologically inspired evolutionary opinion

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148658244

10.1080/10255842.2010.520704

This work presents experiments and modelling aimed at characterising the passive mechanical behaviour of the human thoracic descending aorta. To this end, uniaxial tension and pressurisation tests on healthy samples corresponding to newborn, young and adult arteries are performed. Then, the tensile measurements are used to calibrate the material parameters of the Holzapfel constitutive model. This model is found to adequately adjust the material behaviour in a wide deformation range; in particular, it captures the progressive stiffness increase and the anisotropy due to the stretching of the collagen fibres. Finally, the assessment of these material parameters in the modelling of the pressurisation test is addressed. The implication of this study is the possibility to predict the mechanical response of the human thoracic descending aorta under generalised loading states like those that can occur in physiological conditions and/or in medical device application

Mechanical characterization of the human thoracic descending aorta Experiments and modelling

mechanical characterization of the human thoracic descending aorta experiments and modelling

presents aimed characterising passive thoracic descending aorta. uniaxial tension pressurisation healthy newborn arteries performed. tensile calibrate holzapfel constitutive model. adequately adjust deformation captures progressive stiffness anisotropy stretching collagen fibres. pressurisation addressed. implication predict thoracic descending aorta generalised loading physiological

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148658248

10.1016/j.msec.2010.11.010

Making artificial fibers inspired in spider silks is considered as one of the milestones in the field of biomimetics. The interest is usually justified by the outstanding tensile properties of natural fibers, but it is usually overlooked that spider silk is endowed with a number of related properties – supercontraction, recovery and the existence of a ground state – that impart the material with additional desirable features, such as the possibility of tuning its mechanical behaviour. In this work we present a review on the experimental analysis and significance of these properties, stressing the contributions of our research group to the field. It is also demonstrated how the knowledge gained in the basic study of the natural material has been essential for the improvement of the properties exhibited by artificially processed bio-inspired silk fiber

Polymeric fibers with tunable properties Lessons from spider silk

polymeric fibers with tunable properties lessons from spider silk

artificial fibers inspired spider silks milestones biomimetics. justified outstanding tensile fibers overlooked spider silk endowed supercontraction recovery impart desirable tuning behaviour. stressing field. gained exhibited artificially processed inspired silk fiber

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148662946

10.1016/j.jhg.2012.02.002

Recent applications of Foucauldian categories in geography, spatial history and the history of town planning have opened up interesting new perspectives, with respect to both the evolution of spatial knowledge and the genealogy of territorial techniques and their relation to larger socio-political projects, that would be enriched if combined with other discursive traditions. This article proposes to conceptualise English parliamentary enclosureea favourite episode for Marxist historiography, frequently read in a strictly materialist fashioneas a precedent of a new form of sociospatial governmentality, a political technology that inaugurates a strategic manipulation of territory for social change on the threshold between feudal and capitalist spatial rationalities. I analyse the sociospatial dimensions of parliamentary enclosure’s technical and legal innovations and compare them to the forms of communal self-regulation of land use customs and everyday regionalisations that preceded it. Through a systematic, replicable mechanism of reterritorialisation, enclosure acts normalised spatial regulations, blurred regional differences in the social organisation of agriculture and erased the modes of autonomous social reproduction linked to common land. Their exercise of dispossession of material resources, social capital and community representations is interpreted therefore as an inaugural logic that would pervade the emergent spatial rationality later known as planning

Territory and the governmentalisation of social reproduction: parliamentary enclosure and spatial rationalities in the transition from feudalism to capitalism

territory and the governmentalisation of social reproduction: parliamentary enclosure and spatial rationalities in the transition from feudalism to capitalism

foucauldian categories geography town planning opened perspectives genealogy territorial socio projects enriched discursive traditions. proposes conceptualise english parliamentary enclosureea favourite episode marxist historiography frequently read strictly materialist fashioneas precedent sociospatial governmentality inaugurates strategic manipulation territory feudal capitalist rationalities. analyse sociospatial parliamentary enclosure’s legal innovations communal customs everyday regionalisations preceded replicable reterritorialisation enclosure acts normalised regulations blurred organisation agriculture erased autonomous reproduction land. exercise dispossession capital representations interpreted inaugural logic pervade emergent rationality planning

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148663451

10.1093/cvr/cvs113

Sudden cardiac death is one of the main causes of mortality in patients with structural heart disease. Although an implantable cardioverter de?brillator signi?cantly reduces the mortality rate, many patients never receive a shock. Identi?cation of high-risk patients would reduce the costs associated with this therapy and prevent the deleterious effect of inappropriate discharges. As scar tissue is the substrate of ventricular arrhythmias in patients with structural heart disease, scar characterization could allow strati?cation of the risk. The objective of this article is to review the role of scar characteristics in the pathogenesis of ventricular arrhythmias in patients with structural heart disease

Do the spatial characteristics of myocardial scar tissue determine the risk of ventricular arrhythmias?

do the spatial characteristics of myocardial scar tissue determine the risk of ventricular arrhythmias?

sudden disease. implantable cardioverter brillator signi cantly reduces never receive shock. identi cation prevent deleterious inappropriate discharges. scar ventricular arrhythmias scar strati cation risk. scar pathogenesis ventricular arrhythmias

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148664135

10.1016/j.tsf.2012.03.020

The optoelectronic properties of Cu2ZnSnS4 and environmental considerations have attracted significant interest for photovoltaics. Using first-principles, we analyze the possible improvement of this material as a photovoltaic absorber via the isoelectronic substitution of S with O atoms. The evolution of the acceptor level is analyzed with respect to the atomic position of the nearest neighbors of the O atom. We estimate the maximum efficiency of this compound when used as a light absorber. The presence of the sub-band gap level below the conduction band could increases the solar-energy conversion with respect to the host

Effect of the oxygen isoelectronic substitution in Cu2ZnSnS4 and its photovoltaic application

effect of the oxygen isoelectronic substitution in cu2znsns4 and its photovoltaic application

optoelectronic znsns considerations attracted photovoltaics. principles analyze photovoltaic absorber isoelectronic substitution atoms. acceptor nearest neighbors atom. compound absorber. conduction conversion

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148668403

10.1063/1.4816837

We demonstrate 1.81 eV GaInP solar cells approaching the Shockley-Queisser limit with 20.8% solar conversion efficiency, 8% external radiative efficiency, and 80–90% internal radiative efficiency at one-sun AM1.5 global conditions. Optically enhanced voltage through photon recycling that improves light extraction was achieved using a back metal reflector. This optical enhancement was realized at one-sun currents when the non-radiative Sah-Noyce-Shockley junction recombination current was reduced by placing the junction at the back of the cell in a higher band gap AlGaInP layer. Electroluminescence and dark current-voltage measurements show the separate effects of optical management and non-radiative dark current reduction

Enhanced external radiative efficiency for 20.8 efficient single-junction GaInP solar cells

enhanced external radiative efficiency for 20.8 efficient single-junction gainp solar cells

gainp approaching shockley queisser conversion radiative radiative conditions. optically recycling improves extraction reflector. enhancement realized currents radiative noyce shockley junction recombination placing junction algainp layer. electroluminescence radiative

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148674672

10.1007/978-3-319-14678-2_3

A series of motion compensation algorithms is run on the challenge data including methods that optimize only a linear transformation, or a non-linear transformation, or both – first a linear and then a non-linear transformation. Methods that optimize a linear transformation run an initial segmentation of the area of interest around the left myocardium by means of an independent component analysis (ICA) (ICA-*). Methods that optimize non-linear transformations may run directly on the full images, or after linear registration. Non-linear motion compensation approaches applied include one method that only registers pairs of images in temporal succession (SERIAL), one method that registers all image to one common reference (AllToOne), one method that was designed to exploit quasi-periodicity in free breathing acquired image data and was adapted to also be usable to image data acquired with initial breath-hold (QUASI-P), a method that uses ICA to identify the motion and eliminate it (ICA-SP), and a method that relies on the estimation of a pseudo ground truth (PG) to guide the motion compensation

Comparison of linear and non-linear 2D+T registration methods for DE-MRI cardiac perfusion studies

comparison of linear and non-linear 2d+t registration methods for de-mri cardiac perfusion studies

compensation challenge optimize transformation. optimize segmentation myocardium optimize transformations registration. compensation registers succession serial registers alltoone exploit quasi periodicity breathing acquired adapted usable acquired breath hold quasi eliminate relies pseudo truth guide compensation

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148676317

10.1016/j.solmat.2014.01.034

With the final goal of integrating III-V materials on silicon substrates for tandem solar cells, the influence of the Metal-Organic Vapor Phase Epitaxy (MOVPE) environment on the minority carrier properties of silicon wafers has been evaluated. These properties will essentially determine the photovoltaic performance of the bottom cell in a III-V-on-Si tandem solar cell. A comparison of the base minority carrier lifetimes obtained for different thermal processes carried out in a MOVPE reactor on Czochralski silicon wafers has been carried out. An important degradation of minority carrier lifetime during the surface preparation (i.e. H2 anneal) has been observed. Three different mechanisms have been proposed for explaining this behavior: 1) the introduction of extrinsic impurities coming from the reactor; 2) the activation of intrinsic lifetime killing impurities coming from the wafer itself; and finally, 3) the formation of crystal defects, which eventually become recombination centers. The effect of the emitter formation by phosphorus diffusion has also been evaluated. In this sense, it has been reported that lifetime can be recovered during the emitter formation either by the effect of the P on extracting impurities, or by the role of the atomic hydrogen on passivating the defects

Impact of metal-organic vapor phase epitaxy environment on silicon bulk lifetime for III–V-on-Si multijunction solar cells

impact of metal-organic vapor phase epitaxy environment on silicon bulk lifetime for iii–v-on-si multijunction solar cells

goal integrating silicon substrates tandem vapor epitaxy movpe minority carrier silicon wafers evaluated. essentially photovoltaic tandem cell. minority carrier lifetimes movpe reactor czochralski silicon wafers out. degradation minority carrier lifetime preparation i.e. anneal observed. explaining extrinsic impurities coming reactor intrinsic lifetime killing impurities coming wafer defects eventually recombination centers. emitter phosphorus evaluated. lifetime recovered emitter extracting impurities passivating defects

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15131664

10.1103/PhysRevA.74.041604

We propose an experimental setup of ultracold fermions in an optical lattice to determine the pairing gap in a superfluid state and the spin ordering in a Mott-insulating state. The idea is to apply a periodic modulation of the lattice potential and to use the thereby induced double occupancy to probe the system. We show by full time-dependent calculation using the adaptive time-dependent density-matrix renormalization-group method that the position of the peak in the spectrum of the induced double occupancy gives the pairing energy in a superfluid and the interaction energy in a Mott insulator, respectively. In the Mott insulator we relate the spectral weight of the peak to the spin ordering at finite temperature using perturbative calculations

Modulation spectroscopy with ultracold fermions in an optical lattice

modulation spectroscopy with ultracold fermions in an optical lattice

propose setup ultracold fermions pairing superfluid ordering mott insulating state. modulation thereby occupancy system. adaptive renormalization occupancy pairing superfluid mott insulator respectively. mott insulator relate ordering perturbative

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152160985

10.1016/j.nima.2008.12.200

Extending pulse shape discrimination (PSD) to digitized signals is one of the most promising methods to identify particles stopped in a detector. Using the CIME accelerator in the GANIL laboratory, a measurement campaign was done to collect data corresponding to different charges, masses and energies of implanted ions. These data are used to develop an algorithm capable to discriminate the different particles both in mass and charge. In this experiment, a View the MathML source n-TD reverse mounted Si detector was used. These studies on PSD are part of the FAZIA R&D, a research and development project aiming at building a new 4π array for isospin nuclear physics

New digital techniques applied to A and Z identification using pulse shape discrimination of silicon detector current signals

new digital techniques applied to a and z identification using pulse shape discrimination of silicon detector current signals

extending discrimination digitized promising stopped detector. cime accelerator ganil campaign collect charges implanted ions. capable discriminate charge. mathml reverse mounted used. fazia aiming array isospin

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152355127

10.1016/j.physc.2006.03.062

SERA 06The design of input power couplers represents one of the most important challenges of accelerators that use super-conducting RF technology. These devices must fulfil several functions while being subject to mechanical, electromagnetic, vacuum and cryogenic constraints. The rapidly increasing number of projects, planned or under construction, which propose to use super-conducting cavities has prompted developments in power couplers for both CW and pulsed applications. Amongst the projects for which couplers have, or are being, developed one finds VUV and X-ray free electron lasers (based on self-amplified spontaneous emission), spallation neutron sources (SNS), energy recovery linacs, and high energy colliders. We will review the design requirements and performances obtained for several of these couplers. Particular attention will be paid to the couplers which have been used on the TESLA Test Facility at DESY, the variations of this coupler which are under consideration for future synchrotron light sources and the coupler chosen for use on the SNS

The design and performance of CW and pulsed power couplers - A review

the design and performance of cw and pulsed power couplers - a review

sera couplers challenges accelerators super conducting technology. devices fulfil electromagnetic cryogenic constraints. rapidly projects planned propose super conducting cavities prompted developments couplers pulsed applications. amongst projects couplers finds lasers amplified spontaneous spallation neutron recovery linacs colliders. performances couplers. paid couplers tesla facility desy coupler consideration synchrotron coupler

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153413565

10.1016/j.indcrop.2015.05.086

The Euterpe oleracea Mart. (açaí) is a plant from the Amazon region, classified as "super fruit" because of its various functional properties. However, limited investigation has been performed on açaí by-products, such as seeds. Therefore, the aim of this work was to characterized the phenolic compounds of the aqueous extract of açaí seeds and further evaluate its bioactivity (antioxidant and cytotoxic activities. Only proanthocyanidins were detected, being a B-type (epi)catechin tetramer the most abundant; however, procyanidin trimmers were the most predominant form. Açaí seeds extract revealed a high antioxidant (EC50 ranging from 3.6 to 19.4 μg/mL) and cytotoxic activity, being more effective in the cervical carcinoma cell line (HeLa; GI50 = 18 μg/mL); it did not show toxicity for non-tumor cells. Açaí seeds are considered a waste and could have an added economic benefit, through the extraction of natural antioxidants, particularly proanthocyanidins, that could find applications in food and pharmaceutical industries.The authors are grateful to Foundation for Science and Technology (FCT, Portugal) for financial support to the research centre CIMO (strategic project PEst-OE/AGR/UI0690/2011) and L. Barros researcher contract under “Programa Compromisso com Ciência - 2008”. The authors are also grateful to Jamil S. Oliveira by the initial discussions on the preparation of samples

The powerful in vitro bioactivity of Euterpe oleracea Mart. seeds and related phenolic compounds

the powerful in vitro bioactivity of euterpe oleracea mart. seeds and related phenolic compounds

euterpe oleracea mart. açaí amazon classified super fruit properties. açaí seeds. phenolic aqueous extract açaí seeds bioactivity antioxidant cytotoxic activities. proanthocyanidins catechin tetramer abundant procyanidin trimmers predominant form. açaí seeds extract antioxidant ranging cytotoxic cervical carcinoma hela toxicity cells. açaí seeds waste benefit extraction antioxidants proanthocyanidins pharmaceutical industries.the grateful foundation portugal cimo strategic pest barros researcher contract “programa compromisso ciência grateful jamil oliveira discussions preparation

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154259174

10.1007/JHEP03(2017)115

We consider the transverse-momentum distribution of a Higgs boson produced through gluon fusion in hadron collisions. At small transverse momenta, the large logarithmic terms are resummed up to next-to-leading-logarithmic (NLL) accuracy. The resummed computation is consistently matched to the next-to-leading-order (NLO) result valid at large transverse momenta. The ensuing Standard Model prediction is supplemented by possible new-physics effects parametrised through three dimension-six operators related to the modification of the top and bottom Yukawa couplings, and to the inclusion of a point-like Higgs-gluon coupling, respectively. We present resummed transverse-momentum spectra including the effect of these operators at NLL+NLO accuracy and study their impact on the shape of the distribution. We find that such modifications, while affecting the total rate within the current uncertainties, can lead to significant distortions of the spectrum. The proper parametrization of such effects becomes increasingly important for experimental analyses in Run II of the LHC

Modeling BSM effects on the Higgs transverse-momentum spectrum in an EFT approach

modeling bsm effects on the higgs transverse-momentum spectrum in an eft approach

boson gluon fusion hadron collisions. momenta logarithmic resummed logarithmic accuracy. resummed consistently matched valid momenta. ensuing supplemented parametrised modification yukawa couplings inclusion gluon respectively. resummed distribution. modifications affecting distortions spectrum. proper parametrization increasingly

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154403879

10.1016/j.carbpol.2018.03.021

Steam explosion (150 – 200 ºC, 5 – 30 min) was performed on a commercial cellulose presented in two configurations (fiberized and compact sheet) and its effect on their chemical and physical properties was studied, along with the influence of two different preservation methods (acetone drying and freezing) after pretreatment. No degradation compounds were produced during pretreatment, although solid recovery (RS) decreased with temperature from 90% to 62%. Similar particle size and surface conditions (increased porosity) were found for both types of pretreated samples despite the extremely different initial configuration. Crystallinity diminished for 150 ºC samples, but 200 ºC pretreatment promoted recrystallization. Pretreatment also reduced polymerization degree, although enzymatic accessibility did not improve. Both acetone and freezing processes extremely affected cellulose properties. Acetone drying counterbalanced crystallinity and enzymatic accessibility variations of pretreated samples, while decreasing polymerization degree to 302. Freezing dramatically decreased enzymatic accessibility of pretreated samples down to 15.8%.UIC-Consejería de Educación Junta de Castilla y León, University of Valladoli

Study of steam explosion pretreatment and preservation methods of commercial cellulose

study of steam explosion pretreatment and preservation methods of commercial cellulose

steam explosion commercial cellulose configurations fiberized sheet preservation acetone drying freezing pretreatment. degradation pretreatment recovery porosity pretreated extremely configuration. crystallinity diminished pretreatment promoted recrystallization. pretreatment polymerization enzymatic accessibility improve. acetone freezing extremely cellulose properties. acetone drying counterbalanced crystallinity enzymatic accessibility pretreated decreasing polymerization freezing dramatically enzymatic accessibility pretreated .uic consejería educación junta castilla león valladoli

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154816684

10.1038/s41598-018-20122-9

Shape variability represents an important direct response of organisms to selective environments. Here, we use a combination of geometric morphometrics and generalised additive mixed models (GAMMs) to identify spatial patterns of natural shell shape variation in the North Atlantic and Arctic blue mussels, Mytilus edulis and M. trossulus, with environmental gradients of temperature, salinity and food availability across 3980 km of coastlines. New statistical methods and multiple study systems at various geographical scales allowed the uncoupling of the developmental and genetic contributions to shell shape and made it possible to identify general relationships between blue mussel shape variation and environment that are independent of age and species influences. We find salinity had the strongest effect on the latitudinal patterns of Mytilus shape, producing shells that were more elongated, narrower and with more parallel dorsoventral margins at lower salinities. Temperature and food supply, however, were the main drivers of mussel shape heterogeneity. Our findings revealed similar shell shape responses in Mytilus to less favourable environmental conditions across the different geographical scales analysed. Our results show how shell shape plasticity represents a powerful indicator to understand the alterations of blue mussel communities in rapidly changing environments

Blue mussel shell shape plasticity and natural environments: a quantitative approach

blue mussel shell shape plasticity and natural environments: a quantitative approach

organisms selective environments. geometric morphometrics generalised additive gamms atlantic arctic mussels mytilus edulis trossulus gradients salinity availability coastlines. geographical uncoupling developmental mussel influences. salinity strongest latitudinal mytilus producing shells elongated narrower dorsoventral margins salinities. supply drivers mussel heterogeneity. mytilus favourable geographical analysed. plasticity powerful indicator alterations mussel communities rapidly changing environments

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159488644

10.1002/pts.2220

An oxygen scavenger based on a catalytic system with palladium (CSP) was recently developed to remove oxygen in food packagings. Although the CSP worked with various types of food, with some foods, an inhibition of the CSP was observed. Because such catalytic systems are susceptible to poisoning by sulfurcontaining compounds, the aim of this study was to understand the inactivation of palladium-based catalysts in presence of foods containing volatile sulfur compounds (VSCs). To achieve this, the oxygen scavenging activity (OSA) of the CSP was evaluated in presence of selected food products. Afterwards, VSCs mainly present in these foods were exposed to the CSP, and the influence on the OSA was evaluated. Finally, headspace analysis was performed with the diluted VSCs and with the packaged food products using proton transfer reaction time-of-flight mass spectrometry. It was found that the catalytic activity of the CSP was inhibited when VSCs were present in the headspace in concentrations ranging between 10.8–36.0 ppbv (dimethyl sulfide, DMS), 1.2–7.2 ppbv (dimethyl disulfide), 0.7–0.9 ppbv (dimethyl trisulfide), 2.1–5.8 ppbv methional) and 4.6–24.5 ppbv (furfuryl thiol). It was concluded that in packaged roast beef and cheese, DMS may be the compound mainly responsible for the inactivation of the CSP. In packagings containing ham, the key compounds were hydrogen sulfide and methanethiol; in peanuts, it was methanethiol; and in par-baked buns, an accumulation of methional, DMS, butanethiol and methionol. When potato chips were packaged, it was demonstrated that when VSCs are present in low concentrations, oxygen can still be scavenged at a reduced OSA

Inactivation of palladium-based oxygen scavenger system by volatile sulphur compounds present in the headspace of packaged food

inactivation of palladium-based oxygen scavenger system by volatile sulphur compounds present in the headspace of packaged food

scavenger catalytic palladium remove packagings. worked foods observed. catalytic susceptible poisoning sulfurcontaining inactivation palladium catalysts foods volatile sulfur vscs scavenging products. afterwards vscs foods exposed evaluated. headspace diluted vscs packaged proton flight spectrometry. catalytic inhibited vscs headspace ranging ppbv dimethyl sulfide ppbv dimethyl disulfide ppbv dimethyl trisulfide ppbv methional ppbv furfuryl thiol concluded packaged roast beef cheese compound inactivation csp. packagings sulfide methanethiol peanuts methanethiol baked buns accumulation methional butanethiol methionol. potato chips packaged vscs scavenged

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162459057

10.1016/j.jbankfin.2004.09.001

This paper examines the wealth effects of financial-institution strategic alliances on the shareholders of the newly allied firms. Our paper is different from previous studies of non-financial joint ventures, financial and non-financial mergers and acquisitions, and non-financial strategic alliances in three important aspects/ways: First, we focus on financial institutions that form strategic alliances. Second, while most related studies use U.S. data, this paper employs Japanese data for the late 1990s, directly testing financial theory in a different setting. Finally, we study whether different types of alliances result in differing magnitudes of stock market responses. Our primary results are as follows: First, we find that a strategic alliance, on average, increases the value of the partner firms. This is consistent with the “synergy” hypothesis. Second, the gains from the alliance are spread more widely among the partners than would be suggested by a random alternative, supporting a “win-win” hypothesis. Third, smaller partners tend to experience larger percentage gains, which is consistent with a “relative size” hypothesis. Fourth, the market values inter-group alliance announcements more than intra-group alliance announcements; the latter may well be seen as redundant. This is consistent with an “inter-group synergies” hypothesis. Fifth, we do not find a significant difference in the abnormal returns showed by domestic-foreign alliances and domestic-domestic alliances, although both sets of alliances show significantly positive returns. We thus do not find support for a “foreign firm superior” hypothesis. Finally, we find that an investment-banking alliance has a strong positive effect on abnormal returns, indicating that investment banking, which has been underdeveloped in Japan relative to the U.S., may be a promising business for financial institutions. Overall, this paper complements the existing literature in that we analyze the value of financial institution alliances. Our analysis reconfirms that strategic alliances are value-enhancing. This is consistent with previous studies that find increased value in the announcement of a strategic alliance or a merger. Our results are consistent with the notion that financial deregulation tends to increase competition, which, in turn, encourages firms to adopt aggressive corporate strategies. This is viewed as a positive move by investors, as evidenced by the average gains of the shareholders of these alliance-forging firms

Measuring the Value of Strategic Alliances in the Wake of a Financial Implosion: Evidence from Japan's Financial Services Sector

measuring the value of strategic alliances in the wake of a financial implosion: evidence from japan's financial services sector

examines wealth institution strategic alliances shareholders newly allied firms. ventures mergers acquisitions strategic alliances ways institutions strategic alliances. u.s. employs japanese setting. alliances differing magnitudes stock responses. strategic alliance partner firms. “synergy” hypothesis. gains alliance spread widely partners supporting “win win” hypothesis. partners tend gains “relative size” hypothesis. fourth alliance announcements intra alliance announcements redundant. “inter synergies” hypothesis. fifth abnormal returns domestic foreign alliances domestic domestic alliances alliances returns. “foreign firm superior” hypothesis. investment banking alliance abnormal returns investment banking underdeveloped u.s. promising institutions. complements analyze institution alliances. reconfirms strategic alliances enhancing. announcement strategic alliance merger. notion deregulation tends competition encourages firms adopt aggressive corporate strategies. viewed move investors evidenced gains shareholders alliance forging firms

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18275542

10.1049/iet-smt.2011.0123

This paper is a postprint of a paper submitted to and accepted for publication in Science, Measurement & Technology, IET and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at IET Digital LibraryMethods are now available to solve numerically electromagnetic problems with uncertain input data (behaviour law or geometry). The stochastic approach consists in modelling uncertain data using random variables. Discontinuities on the magnetic field distribution in the stochastic dimension can arise in a problem with uncertainties on the geometry. The basis functions (polynomial chaos) usually used to approximate the unknown fields in the random dimensions are no longer suited. One possibility proposed in the literature is to introduce additional functions (enrichment function) to tackle the problem of discontinuity. In this study, the authors focus on the method of random mappings and they show that in this case the discontinuity are naturally taken into account and that no enrichment function needs to be added.This work is supported by the program MEDEE funded by the Nord Pas de Calais council and the European Communit

Comparison of two approaches to compute magnetic field in problems with random domains

comparison of two approaches to compute magnetic field in problems with random domains

postprint submitted publication institution copyright. copy record digital librarymethods solve numerically electromagnetic uncertain stochastic uncertain variables. discontinuities stochastic arise geometry. chaos approximate unknown suited. enrichment tackle discontinuity. mappings discontinuity naturally enrichment added.this medee funded nord calais council communit

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185415046

10.1016/j.compcom.2007.06.001.

This is the author's version of a work that was accepted for publication in Computers and Composition. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Computers and Composition, Volume 24, Issue 3, 2007. DOI: 10.1016/j.compcom.2007.06.001.Wikis represent flexible tools functioning as open-ended environments for collaboration while also offering process and group writing support. Here we focus on a project to innovate the use of wikis for collaborative writing within student groups in a final-year undergraduate political science course. The primary questions guiding our research were in what ways could wikis assist collaborative learning in an undergraduate course in political science and how we could support educators' in the effective use of wikis? Curiously, wikis may serve as a mediating artifact for collaborative writing even among students who are reluctant to post online drafts. The paper raises questions concerning the nature and limits of lecturer and tutor power to deliver transformative educational innovations in relation to the capacity of students to embrace, comply with, or resist such innovation. In analysing the negotiation of the use of wikis in the course by and among the lecturer, tutors, and students, we draw on two principles in activity theory, which Yrjo Engestrom argued are central to his model of expansive learning: multi-voicedness and contradictions [Engestrom, Yrjo. (1987). Learning by expanding: An activity-theoretical approach to developmental research. Helsinki: Orienta-Konsultit; Engestrom, Yrjo. (2001). Expansive learning at work: Toward an activity theoretical reconceptualization. Journal of Education and Work 14(1), 133–156.]. We add a third principle, transparency, to more fully capture what we observed

Weathering wikis: net-based learning meets political science in a South African university

weathering wikis: net-based learning meets political science in a south african university

publication computers composition. definitive subsequently computers pcom. .wikis flexible functioning ended environments offering writing support. innovate wikis collaborative writing student undergraduate course. guiding ways wikis assist collaborative undergraduate educators wikis curiously wikis serve mediating artifact collaborative writing reluctant drafts. raises concerning lecturer tutor deliver transformative educational innovations embrace comply resist innovation. analysing negotiation wikis lecturer tutors draw principles yrjo engestrom argued expansive voicedness contradictions engestrom yrjo. expanding developmental research. helsinki orienta konsultit engestrom yrjo. expansive toward reconceptualization. transparency capture

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188176927

10.1063/1.3157263

Producción CientíficaHeat capacities have been measured as a function of temperature for aluminum cluster anions with 35–70 atoms. Melting temperatures and latent heats are determined from peaks in the heat capacities; cohesive energies are obtained for solid clusters from the latent heats and dissociation energies determined for liquid clusters. The melting temperatures, latent heats, and cohesive energies for the aluminum cluster anions are compared to previous measurements for the corresponding cations. Density functional theory calculations have been performed to identify the global minimum energy geometries for the cluster anions. The lowest energy geometries fall into four main families: distorted decahedral fragments, fcc fragments, fcc fragments with stacking faults, and “disordered” roughly spherical structures. The comparison of the cohesive energies for the lowest energy geometries with the measured values allows us to interpret the size variation in the latent heats. Both geometric and electronic shell closings contribute to the variations in the cohesive energies (and latent heats), but structural changes appear to be mainly responsible for the large variations in the melting temperatures with cluster size. The significant charge dependence of the latent heats found for some cluster sizes indicates that the electronic structure can change substantially when the cluster melts

Electronic effects on melting: Comparison of aluminum cluster anions and cations

electronic effects on melting: comparison of aluminum cluster anions and cations

producción científicaheat capacities aluminum anions atoms. melting latent heats capacities cohesive latent heats dissociation clusters. melting latent heats cohesive aluminum anions cations. geometries anions. geometries fall families distorted decahedral fragments fragments fragments stacking faults “disordered” roughly spherical structures. cohesive geometries interpret latent heats. geometric closings cohesive latent heats melting size. latent heats sizes substantially melts

exact_dup

19125434

10.1002/ejic.200600309

The reduced Schiff bases of salicylaldehyde [and o-vanillin (o-van)] with D,L- and L-diaminopropionic acid (DPA), designated by salDPA, and L-2,4-diaminopentanoic acid [ornithine (Orn)], designated by salOrn, as well as the VIVO2+ and VVO2+ complexes of salDPA were prepared. The compounds were characterised in the solid state and in solution. The structure of H4salDPA+Cl- was determined by X-ray diffraction. Complexation of VIVO2+ and VVO2+ with salDPA and salOrn (only the VIVO system) in aqueous solution was studied by potentiometry, UV/Visible spectroscopy and circular dichroism, as well as by EPR spectroscopy for the VIVO-salDPA system and by 1H- and 51V NMR spectroscopy for the VVO2-salDPA system. Stoichiometries and complex formation constants were determined by potentiometry at 25 °C and I = 0.2 M KCl. Practically only 1:1 complexes were formed in both systems with composition (VO)LH2 and(VO)L in the VIVO-salDPA system, and with composition(VO2)LH and (VO2)L in the VVO2-salDPA system. Spectroscopic data provided information about the most probable binding modes of each stoichiometry. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)http://dx.doi.org/10.1002/ejic.20060030

Vanadium (IV and V) Complexes of Reduced Schiff Bases Derived from the Reaction of Aromatic o -Hydroxyaldehydes and Diamines Containing Carboxyl Groups

vanadium (iv and v) complexes of reduced schiff bases derived from the reaction of aromatic o -hydroxyaldehydes and diamines containing carboxyl groups

schiff bases salicylaldehyde vanillin diaminopropionic designated saldpa diaminopentanoic ornithine designated salorn complexes saldpa prepared. characterised solution. saldpa diffraction. complexation saldpa salorn aqueous potentiometry visible spectroscopy circular dichroism spectroscopy saldpa spectroscopy saldpa system. stoichiometries potentiometry kcl. practically complexes saldpa saldpa system. spectroscopic probable stoichiometry. wiley verlag gmbh kgaa weinheim ejic.

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19125556

10.1002/elan.200603732

Polypyrrole thin film microelectrodes prepared from an aqueous solution of the sodium salt of 1, 2-napthaquinone-4-sulfonic acid and pyrrole in hydrochloric acid as the supporting electrolyte was characterized electrochemically for the first time and found to exhibit good electronic and spectroscopic properties. Voltammetric investigations showed that the polymer exhibited quasireversible kinetics in a potential window of -400 mV to 700 mV, with a formal potential of 322 mV vs. Ag/AgCl. The diffusion coefficient was calculated to be 1.02×10-6 cm2 s-1 for a thin film with a surface concentration of 1.83×10-7 mol cm-2 having a rate constant of 2.20×10-3 cm s-1 at 5 mV s-1. Electrochemical impedance spectroscopy provided quantitative information about the conductivity changes within the modified polymer and support for the quasireversible kinetics suggested by voltammetry. The changes in electrical properties of the polymer during electrochemical p-doping and n-doping were quantified by equivalent electrical circuit fitting and assisted in the identification of the suggested kinetic mechanism. SNIFTIRS confirmed the incorporation of the surfactant into the polypyrrole film and for the first time structural changes within the polymer were observed that could be related to the observed electrochemistry of the polymer.http://dx.doi.org/10.1002/elan.20060373

Electrochemical Synthesis and Characterization of 1,2-Naphthaquinone-4-Sulfonic Acid Doped Polypyrrole

electrochemical synthesis and characterization of 1,2-naphthaquinone-4-sulfonic acid doped polypyrrole

polypyrrole film microelectrodes aqueous sodium salt napthaquinone sulfonic pyrrole hydrochloric supporting electrolyte electrochemically exhibit spectroscopic properties. voltammetric investigations polymer exhibited quasireversible kinetics window formal agcl. film electrochemical impedance spectroscopy conductivity polymer quasireversible kinetics voltammetry. electrical polymer electrochemical doping doping quantified electrical circuit fitting assisted mechanism. sniftirs confirmed incorporation surfactant polypyrrole film polymer electrochemistry polymer. elan.

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1946690

10.1016/j.physletb.2007.09.025

On the quantum stage spacetime had the foam-like structure. When the Universe cools, the foam structure tempers and does not disappear. We show that effects caused by the foamed structure mimic very well the observed Dark Matter phenomena. Moreover, we show that in a foamed space photons undergo a chaotic scattering and together with every discrete source of radiation we should observe a diffuse halo. We show that the distribution of the diffuse halo of radiation around a point-like source repeats exactly the distribution of dark matter around the same source, i.e. the DM halos are sources of the diffuse radiation

Foam-like structure of the Universe

foam-like structure of the universe

spacetime foam structure. universe cools foam tempers disappear. foamed mimic phenomena. foamed photons undergo chaotic diffuse halo. diffuse halo repeats i.e. halos diffuse

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19484881

10.1016/j.compositesb.2013.06.001

This work was supported by OSEO agency. The authors would like to thank Air Liquide and EADS Composites Aquitaine for their technical support in the H2E project.Improvements in the characterisation of materials used in pipes, tubes or vessels rely on the development of tests on cylindrical samples in order to be consistent with the real manufacturing process. Existing devices are unable to reach the pressure limits required to test high pressure hydrogen storage tanks. We therefore propose an original test device based on a conical fitting system. First, the operational principle and the pressure measurement technique are presented. Next, the choice of apparatus design parameters according to test requirements is discussed. In addition, the device’s capabilities are illustrated on a 39 mm thick CFRP ring test including Digital Image Correlation measurements

Proposal for a smart pressurised ring test to study thick composite produced by filament winding

proposal for a smart pressurised ring test to study thick composite produced by filament winding

oseo agency. liquide eads composites aquitaine project.improvements characterisation pipes tubes vessels rely cylindrical manufacturing process. devices unable storage tanks. propose conical fitting system. operational presented. apparatus discussed. device’s capabilities illustrated thick cfrp digital

exact_dup

2390855

10.1103/PhysRevA.74.041604

We propose an experimental setup of ultracold fermions in an optical lattice to determine the pairing gap in a superfluid state and the spin ordering in a Mott-insulating state. The idea is to apply a periodic modulation of the lattice potential and to use the thereby induced double occupancy to probe the system. We show by full time-dependent calculation using the adaptive time dependent density-matrix renormalization group method that the position of the peak in the spectrum of the induced double occupancy gives the pairing energy in a superfluid and the interaction energy in a Mott-insulator, respectively. In the Mott-insulator we relate the spectral weight of the peak to the spin ordering at finite temperature using perturbative calculations

Modulation spectroscopy with ultracold fermions in an optical lattice

modulation spectroscopy with ultracold fermions in an optical lattice

propose setup ultracold fermions pairing superfluid ordering mott insulating state. modulation thereby occupancy system. adaptive renormalization occupancy pairing superfluid mott insulator respectively. mott insulator relate ordering perturbative

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29018063

10.1007/978-3-642-41057-4_2

This paper examines the use of ontologies for defining query context. The information retrieval system used is based on the probabilistic retrieval model. We extend the use of relevance feedback (RFB) and pseudo-relevance feedback (PF) query expansion techniques using information from a news domain ontology. The aim is to assess the impact of the ontology on the query expansion results with respect to recall and precision. We also tested the results for varying the relevance feedback parameters (number of terms or number of documents). The factors which influence the success of ontology based query expansion are outlined. Our findings show that ontology based query expansion has had mixed success. The use of the ontology has vastly increased the number of relevant documents retrieved, however, we conclude that for both types of query expansion, the PF results are better than the RFB results

Ontology Based Query Expansion with a Probabilistic Retrieval Model

ontology based query expansion with a probabilistic retrieval model

examines ontologies defining query context. retrieval probabilistic retrieval model. extend relevance pseudo relevance query news ontology. ontology query precision. relevance documents success ontology query outlined. ontology query success. ontology vastly documents retrieved query

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29137497

10.1007/s12008-014-0217-4

Product design activity is traditionally presented as a succession of four to six stages. In the early stages of design, during the search for concepts, multi-disciplinary teams are working together, sometimes on the fringe of the digital design chain. But it is during these stages, that most of the product development cost is committed. Therefore, collaboration should be emphasized, and PLM software should contribute to it strongly. This paper first defines the boundaries of the early stages of design. Then, we analyze designer collaboration in this stage and describe the knowledge necessary for efficient collaboration. Finally, we propose and test a concept for a tool to assist the early stages of design, to be integrated in a continuum with other existing digital design tools. A case study is presented in Verallia, specialized in the design and manufacturing of glassware

PLM and early stages collaboration in interactive design, a case study in the glass industry

plm and early stages collaboration in interactive design, a case study in the glass industry

traditionally succession stages. concepts disciplinary teams sometimes fringe digital chain. committed. emphasized strongly. defines boundaries design. analyze designer collaboration. propose assist continuum digital tools. verallia specialized manufacturing glassware

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29138004

10.1063/1.3552539

Semi-solid processing is an innovative technology for near net-shape production of components, where the metallic alloys are processed in the semi-solid state. Taking advantage of the thixotropic behavior of alloys in the semi-solid state, significant progress has been made in semi-solid processing. However, the consequences of such behavior on the flow during thixoforming are still not completely understood. To explore and better understand the influence of the different parameters on material flow during thixoextrusion process, thixoextrusion experiments were performed using the low carbon steel C38. The billet was partially melted at high solid fraction. Effects of various process parameters including the initial billet temperature, the temperature of die, the punch speed during process and the presence of a Ceraspray layer at the interface of tool and billet were investigated through experiments and simulation. After analyzing the results thus obtained, it was identified that the aforementioned parameters mainly affect thermal exchanges between die and part. The Ceraspray layer not only plays a lubricant role, but also acts as a thermal barrier at the interface of tool and billet. Furthermore, the thermal effects can affect the material flow which is composed of various distinct zones

Effects Of Thermal Exchange On Material Flow During Steel Thixoextrusion Process

effects of thermal exchange on material flow during steel thixoextrusion process

innovative metallic alloys processed state. advantage thixotropic alloys progress processing. consequences thixoforming understood. explore thixoextrusion thixoextrusion steel billet partially melted fraction. billet punch ceraspray billet simulation. analyzing aforementioned exchanges part. ceraspray plays lubricant acts barrier billet. composed zones

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33172413

10.1007/978-3-319-03176-7_27

Most of the current evacuation plans are based on static signaling, fixed monitoring infrastructure, and limited user notification and feedback mechanisms. These facts lead to lower situation awareness, in the case event of an emergency, such as blocked emergency exits, while delaying the reaction time of individuals. In this context, we introduce the E-Flow communication system, which improves the user awareness by integrating personal, mobile and fixed devices with the existing monitoring infrastructure. Our system broadens the notification and monitoring alternatives, in real time, among, safety staff, end-users and evacuation related devices, such as sensors and actuators

E-Flow: A communication system for user notification in dynamic evacuation scenarios

e-flow: a communication system for user notification in dynamic evacuation scenarios

evacuation plans infrastructure notification mechanisms. facts awareness emergency blocked emergency exits delaying individuals. improves awareness integrating personal mobile devices infrastructure. broadens notification alternatives staff evacuation devices sensors actuators

exact_dup

35067161

10.1007/JHEP09(2015)039

We compute the renormalized running coupling of SU(3) gauge theory coupled to Nf = 2 flavors of massless Dirac fermions in the 2-index-symmetric (sextet) representation. This model is of particular interest as a minimal realization of the strongly interacting composite Higgs scenario. A recently proposed finite volume gradient flow scheme is used. The calculations are performed at several lattice spacings with two different implementations of the gradient flow allowing for a controlled continuum extrapolation and particular attention is paid to estimating the systematic uncertainties. For small values of the renormalized coupling our results for the β-function agree with perturbation theory. For moderate couplings we observe a downward deviation relative to the 2-loop β-function but in the coupling range where the continuum extrapolation is fully under control we do not observe an infrared fixed point. The explored range includes the locations of the zero of the 3-loop and the 4-loop β-functions in the MS¯$$ \overline{\mathrm{MS}} $$ scheme. The absence of a non-trivial zero in the β-function in the explored range of the coupling is consistent with our earlier findings based on hadronic observables, the chiral condensate and the GMOR relation. The present work is the first to report continuum non-perturbative results for the sextet model

The running coupling of the minimal sextet composite Higgs model

the running coupling of the minimal sextet composite higgs model

renormalized running flavors massless dirac fermions sextet representation. realization interacting composite scenario. used. spacings implementations allowing continuum extrapolation paid estimating uncertainties. renormalized agree perturbation theory. moderate couplings downward continuum extrapolation infrared point. explored locations overline mathrm scheme. trivial explored hadronic observables chiral condensate gmor relation. continuum perturbative sextet

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35082355

10.1007/JHEP10(2014)009

We briefly review why the non-linear realisation of the semi-direct product of a group with one of its representations leads to a field theory defined on a generalised space-time equipped with a generalised vielbein. We give formulae, which only involve matrix multiplication, for the generalised vielbein, the Cartan forms and their transformations. We consider the generalised space-time introduced in 2003 in the context of the non-linear realisation of the semi-direct product of E 11 and its first fundamental representation. For this latter theory we give explicit expressions for the generalised vielbein up to and including the levels associated with the dual graviton in four, five and eleven dimensions and for the IIB theory in ten dimensions. We also compute the generalised vielbein, up to the analogous level, for the non-linear realisation of the semi-direct product of very extended SL(2) with its first fundamental representation, which is a theory associated with gravity in four dimensions

Generalised vielbeins and non-linear realisations

generalised vielbeins and non-linear realisations

briefly realisation representations generalised equipped generalised vielbein. formulae involve multiplication generalised vielbein cartan transformations. generalised realisation representation. expressions generalised vielbein graviton eleven dimensions. generalised vielbein analogous realisation

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35085341

10.1007/JHEP12(2014)094

We construct various examples of 1 4 $$ \frac{1}{4} $$ -BPS giant gravitons embedded into the type IIB supergravity background AdS 3  ×  S + 3  ×  S − 3  ×  S 1 with pure R-R flux: two D1-brane giants wrapping 1-cycles in AdS 3 and S + 3  ×  S − 3 , and one D5-brane giant wrapping a 4-cycle in S + 3  ×  S − 3 and the S 1 . These D-branes are supported by angular momenta α P on one 3-sphere and (1 − α ) P on the other. We then construct a general class of 1 8 $$ \frac{1}{8} $$ -BPS D5-brane giant gravitons wrapping 4-cycles Σ in S + 3  ×  S − 3 and the S 1 . Here Σ is the intersection of a holomorphic surface C $$ \mathcal{C} $$ in ℂ + 2  × ℂ − 2 with the S + 3  ×  S − 3 submanifold. The holomorphic surface C $$ \mathcal{C} $$ is defined by f ( y 1 z 1 , y 1 z 2 , y 2 z 1 , y 2 z 2 ) = 0, with y a and z a the ℂ ± 2 complex coordinates. There is supersymmetry enhancement to 1 4 $$ \frac{1}{4} $$ -BPS in the special case f ( y 1 z 1 ) = 0 of which our original D5-brane giant graviton is an example

D1 and D5-brane giant gravitons on AdS 3 × S 3 × S 3 × S 1

d1 and d5-brane giant gravitons on ads 3 × s 3 × s 3 × s 1

frac giant gravitons embedded supergravity brane giants wrapping cycles brane giant wrapping branes momenta sphere other. frac brane giant gravitons wrapping cycles intersection holomorphic mathcal submanifold. holomorphic mathcal coordinates. supersymmetry enhancement frac brane giant graviton

exact_dup

35085437

10.1007/JHEP12(2014)125

The recent LHCb angular analysis of the exclusive decay B → K * μ + μ − has indicated significant deviations from the Standard Model expectations. Accurate predictions can be achieved at large K * -meson recoil for an optimised set of observables designed to have no sensitivity to hadronic input in the heavy-quark limit at leading order in α s . However, hadronic uncertainties reappear through non-perturbative Λ QCD /m b power corrections, which must be assessed precisely. In the framework of QCD factorisation we present a systematic method to include factorisable power corrections and point out that their impact on angular observables depends on the scheme chosen to define the soft form factors. Associated uncertainties are found to be under control, contrary to earlier claims in the literature. We also discuss the impact of possible non-factorisable power corrections, including an estimate of charm-loop effects. We provide results for angular observables at large recoil for two different sets of inputs for the form factors, spelling out the different sources of theoretical uncertainties. Finally, we comment on a recent proposal to explain the anomaly in B → K * μ + μ − observables through charm-resonance effects, and we propose strategies to test this proposal identifying observables and kinematic regions where either the charm-loop model can be disentangled from New Physics effects or the two options leave different imprints

On the impact of power corrections in the prediction of B → K * μ + μ − observables

on the impact of power corrections in the prediction of b → k * μ + μ − observables

lhcb exclusive deviations expectations. meson recoil optimised observables hadronic hadronic reappear perturbative precisely. factorisation factorisable observables factors. contrary claims literature. factorisable charm effects. observables recoil inputs spelling uncertainties. comment proposal anomaly observables charm propose proposal identifying observables kinematic charm disentangled options leave imprints

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35085514

10.1007/JHEP11(2014)100

We consider the quantum spectral problem appearing the Fermi gas formulation of the ABJM (Aharony-Bergman-Jafferis-Maldacena) matrix model. This is known to related to the refined topological string on local ℙ 1 × ℙ 1 Calabi-Yau geometry. In the ABJM setting the problem is formulated by an integral equation, and is somewhat different from the one formulated directly in terms of the Calabi-Yau geometry and studied in our earlier paper. We use the similar method in our earlier paper to determine the non-perturbative contributions to the quantum phase volume in the ABJM case from the Bohr-Sommerfeld quantization condition. As in our earlier paper, the non-perturbative contributions contain higher order smooth corrections beyond those required by singularity cancellations with the perturbative contributions proposed by Kallen and Marino. Our results imply possible new contributions to the grand potential of the ABJM matrix model

A note on instanton effects in ABJM theory

a note on instanton effects in abjm theory

appearing fermi formulation abjm aharony bergman jafferis maldacena model. refined topological calabi geometry. abjm formulated somewhat formulated calabi paper. perturbative abjm bohr sommerfeld quantization condition. perturbative singularity cancellations perturbative kallen marino. imply grand abjm

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35089001

10.1007/JHEP09(2015)218

Using the recently established classification of 6D SCFTs we present evidence for the existence of families of weak C-functions, that is, quantities which decrease in a flow from the UV to the IR. Introducing a background R-symmetry field strength R , and a non-trivial tangent bundle T on the 6D spacetime, we consider C-functions given by the linear combinations C = m 1 α + m 2 β + m 3 γ, where the α i are the anomaly polynomial coefficients for the formal characteristic classes c 2 ( R ) 2 , c 2 ( R ) p 1 ( T ) and p 1 ( T ) 2 . By performing a detailed sweep over many theories, we determine the shape of the unbounded region in “ m -space” compatible with both Higgs branch flows and tensor branch flows. We also verify that — as expected — the Euler density conformal anomaly falls in the admissible region

Evidence for C-theorems in 6D SCFTs

evidence for c-theorems in 6d scfts

scfts families quantities introducing trivial tangent bundle spacetime combinations anomaly formal performing sweep unbounded space” compatible branch flows branch flows. verify euler conformal anomaly falls admissible

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35089801

10.1007/JHEP05(2015)134

It has been noticed that the k -string observables can be expressed in terms of the fundamental string ones. We identify a sufficient condition for a generic gravity dual background which when satisfied the mapping can be done. The condition is naturally related to a preserved quantity under the T-dualities acting on the Dp-brane describing the high representation Wilson loops. We also find the explicit relation between the observables of the heavy k -quark and the single quark states. As an application to our generic study and motivated by the fact that the anisotropic theories satisfy our condition, we compute the width of the k -string in these theories to find that the logarithmic broadening is still present, but the total result is affected by the anisotropy of the space

k -strings as fundamental strings

k -strings as fundamental strings

noticed observables ones. generic satisfied done. naturally preserved quantity dualities acting brane describing wilson loops. observables states. generic motivated anisotropic satisfy logarithmic broadening anisotropy

exact_dup

35089936

10.1007/JHEP05(2015)106

In this paper, we study the conical entropy in string theory in the simplest setup of dividing the nine dimensional space into two halves. This corresponds to the leading quantum correction to the horizon entropy in string theory on the Rindler space. This entropy is also called the conical entropy and includes surface term contributions. We first derive a new simple formula of the conical entropy for any free higher spin fields. Then we apply this formula to computations of conical entropy in open and closed superstring. In our analysis of closed string, we study the twisted conical entropy defined by making use of string theory on Melvin backgrounds. This quantity is easier to calculate owing to the folding trick. Our analysis shows that the conical entropy in closed superstring is UV finite owing to the string scale cutoff

Notes on entanglement entropy in string theory

notes on entanglement entropy in string theory

conical simplest setup dividing nine halves. horizon rindler space. conical contributions. derive conical fields. computations conical superstring. twisted conical melvin backgrounds. quantity easier owing folding trick. conical superstring owing cutoff

exact_dup

35091901

10.1007/JHEP02(2015)024

We study the Seiberg dualities with an adjoint matter for the U(N) and the SU(N) gauge groups in three- and four-dimensions with four supercharges. The relation between three- and four-dimensional dualities is investigated. We derive the three-dimensional duality from four-dimensional one by the dimensional reduction including the non-perturbative effect of the S 1 $$ {\mathbb{S}}^1 $$ -compactification. In the U(N) case, we obtain the Kim-Park duality which is known as a generalization of the Aharony duality to including an adjoint matter. In the SU(N) case, we obtain the duality which follows from un-gauging the U(N) Kim-Park duality

3d duality with adjoint matter from 4d duality

3d duality with adjoint matter from 4d duality

seiberg dualities adjoint supercharges. dualities investigated. derive duality perturbative mathbb compactification. park duality generalization aharony duality adjoint matter. duality gauging park duality

exact_dup

41114059

10.1016/j.chemosphere.2006.05.119

The Tam Giang-Cau Hai Lagoon, the largest in south east Asia, suffers from a great anthropogenic pressure and appears subject to a\ud process of progressive environmental deterioration. To establish causes, history and trends of lagoon contamination, sediment samples\ud representing three major parts of the systems were sampled and analysed for porosity, organic carbon, total nitrogen, d13C, grain size,\ud radiotracers and PCBs. PCB surficial concentrations range from 10.2 to 24.5 lg kg1, and maximum values are close to NOAA ERL\ud guidelines. The downcore distribution of PCBs shows two well defined peaks in the core from Tam Giang (25.5 and 16.2 lg kg1),\ud whereas the sediment from Cau Hai is characterised by a maximum at the surface. Therefore, present trends indicate that contamination\ud is still increasing or slightly decreasing. The prevailing congeners are 3-CB and 4-CB, hence recent PCBs appear to be mostly originated\ud by Aroclor 1016- and 1242-like mixtures, with some samples influenced also by Aroclor 1248. Present sources seem to be similar everywhere\ud and probably they are widespread all over the territory of the Thua Thien-Hue province

Polychlorinated biphenyls in sediments of the Tam Guang-Cau Hai Lagoon, Central Vietnam

polychlorinated biphenyls in sediments of the tam guang-cau hai lagoon, central vietnam

giang lagoon east asia suffers great anthropogenic progressive deterioration. establish lagoon contamination sediment representing sampled analysed porosity nitrogen grain radiotracers pcbs. surficial noaa guidelines. downcore pcbs giang sediment characterised surface. contamination decreasing. prevailing congeners pcbs mostly originated aroclor mixtures influenced aroclor seem everywhere probably widespread territory thua thien province

exact_dup

41144504

10.1063/1.3393777

We evaluate the phase diagram of the Kern-Frenkel patchy model with four interaction sites for four different values of the radial interaction range (all in the single-bond-per-patch regime) keeping the area of the interaction patches fixed. Four stable crystal phases are investigated, namely diamond cubic (DC), bcc, fcc, and plastic fcc. The DC is favored at low temperatures and pressures, while the bcc is favored at low temperatures and intermediate to high pressures. At low temperatures and very high pressures an ordered fcc phase is found, while-as expected-at high temperatures, the only stable crystal is a plastic fcc phase. We find a rich phase diagram with several re-entrant coexistence lines, which can be brought in the equilibrium phase diagram by a proper choice of the range. We also show that the gas-liquid phase separation becomes metastable as the range narrows, and it takes place in a region of the phase diagram where the low density diamond crystal is the thermodynamically stable phase. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3393777

Phase diagram of a tetrahedral patchy particle model for different interaction ranges

phase diagram of a tetrahedral patchy particle model for different interaction ranges

kern frenkel patchy bond patch keeping patches fixed. diamond cubic plastic fcc. favored pressures favored pressures. pressures ordered plastic phase. entrant coexistence brought proper range. metastable narrows diamond thermodynamically phase.

exact_dup

42629902

10.1088/1742-6596/656/1/012083

Variation of fuel properties occurring during extreme fuel pressurisation in Diesel fuel injectors relative to those under atmospheric pressure and room temperature conditions may affect significantly fuel delivery, fuel injection temperature, injector durability and thus engine performance. Indicative results of flow simulations during the full injection event of a Diesel injector are presented. In addition to the Navier-Stokes equations, the enthalpy conservation equation is considered for predicting the fuel temperature. Cavitation is simulated using an Eulerian-Lagrangian cavitation model fully coupled with the flow equations. Compressible bubble dynamics based on the R-P equation also consider thermal effects. Variable fuel properties function of the local pressure and temperature are taken from literature and correspond to a reference so-called summer Diesel fuel. Fuel pressurisation up to 3000bar pressure is considered while various wall temperature boundary conditions are tested in order to compare their effect relative to those of the fuel heating caused during the depressurisation of the fuel as it passes through the injection orifices. The results indicate formation of strong temperature gradients inside the fuel injector while heating resulting from the extreme friction may result to local temperatures above the fuel's boiling point. Predictions indicate bulk fuel temperature increase of more than 100°C during the opening phase of the needle valve. Overall, it is concluded that such effects are significant for the injector performance and should be considered in relevant simulation tools

Evaluation of friction heating in cavitating high pressure Diesel injector nozzles

evaluation of friction heating in cavitating high pressure diesel injector nozzles

fuel occurring extreme fuel pressurisation diesel fuel injectors room fuel delivery fuel injection injector durability engine performance. indicative injection diesel injector presented. navier stokes enthalpy conservation predicting fuel temperature. cavitation eulerian lagrangian cavitation equations. compressible bubble effects. fuel summer diesel fuel. fuel pressurisation fuel heating depressurisation fuel passes injection orifices. gradients fuel injector heating extreme friction fuel boiling point. fuel opening needle valve. concluded injector

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43610140

10.1016/j.precisioneng.2013.11.006

This paper focuses on burr formation in micro-end milling of two Nickel-Titanium shape memory alloys (SMA), an austenitic and a martensitic NiTi. Phase transformation during machining was also examined. The experimental design approach was used to study the effect of cutting parameters on burr formation. The studied parameters were cutting speed, feed per tooth, depth and width of cut, 20 machining strategy and initial material phase of the NiTi alloy. Different types of burrs were formed during micro-end milling of NiTi alloys; it was observed that top burrs are the most important. The height of top burrs can reach values close to those of the depth of cut. Burrs were observed and characterized using a Scanning Electron Microscope (SEM), confocal and optical microscopes. The affected layer under the machined surface, and phase transformation 25 were investigated by using SEM. The results of the analysis of variance showed a significant formation of burrs, deeply influenced by the feed per tooth and width of cut. An increase in the feed per tooth and a decrease of width of cut tend to decrease the height and width of the top burr. In a thin layer under the machined surface, phase transformation was observed for the martensitic NiTi

Micro-end milling of NiTi biomedical alloys, burr formation and phase transformation

micro-end milling of niti biomedical alloys, burr formation and phase transformation

focuses burr micro milling nickel titanium alloys austenitic martensitic niti. machining examined. cutting burr formation. cutting feed tooth machining niti alloy. burrs micro milling niti alloys burrs important. burrs cut. burrs scanning microscope confocal microscopes. machined sem. burrs deeply influenced feed tooth cut. feed tooth tend burr. machined martensitic niti

exact_dup

46765546

10.1016/j.jinorgbio.2011.12.011

The interaction between thorium and human serum components was studied using difference ultraviolet spectroscopy (DUS), ultrafiltration and high-pressure-anion exchange chromatography (HPAEC) with external inductively conducted plasma mass spectrometry (ICP-MS) analysis. Experimental data are compared with modelling results based on the law of mass action. Human serum transferrin (HSTf) interacts strongly with Th(IV), forming a ternary complex including two synergistic carbonate anions. This complex governs Th(IV) speciation under blood serum conditions. Considering the generally used Langmuir-type model, values of 1033.5 and 1032.5 were obtained for strong and weak sites, respectively. We showed that trace amounts of diethylene triamine pentaacetic acid (DTPA) cannot complex Th(IV) in the blood serum at equilibrium. Unexpectedly this effect is not related to the competition with HSTf but is due to the strong competition with major divalent metal ions for DTPA. However, Th-DTPA complex was shown to be stable for a few hours when it is formed before addition in the biological medium; this is related to the high kinetic stability of the complex. This makes DTPA a potential chelating agent for synthesis of 226Th-labeled biomolecules for application in targeted alpha therapy

Is DTPA a good competing chelating agent for Th(IV) in human serum and suitable in targeted alpha therapy?

is dtpa a good competing chelating agent for th(iv) in human serum and suitable in targeted alpha therapy?

thorium ultraviolet spectroscopy ultrafiltration anion chromatography hpaec inductively spectrometry analysis. action. transferrin hstf interacts forming ternary synergistic carbonate anions. governs speciation conditions. langmuir respectively. trace amounts diethylene triamine pentaacetic dtpa equilibrium. unexpectedly competition hstf competition divalent dtpa. dtpa complex. dtpa chelating agent labeled biomolecules targeted alpha

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46766193

10.1016/j.aop.2011.12.004

Expressions for spatial two-particle correlations in an LS-coupled basis of the harmonic oscillator are used to display the probability distribution of two identical nucleons as a function of their relative distance and their distance from the center of the nucleus. It is shown that a two-nucleon state in the p shell with total orbital angular momentum L = 0 and total spin S = 0 contains a di-neutron and a cigarlike component with equal probability. This result can also be proven analytically with the use of angular correlation functions. Scattering of the nucleons from the p shell to other shells leads to the enhancement of the di-neutron con guration. A semi-quantitative application to 6He is presented which shows that the probability of the di-neutron con guration in the ground state is of the order of 60%. The longterm goal of this work is to obtain a geometric insight into the properties of nuclei with several nucleons in a valence shell

Spatial particle correlations in light nuclei. I Two-particle systems

spatial particle correlations in light nuclei. i two-particle systems

expressions harmonic oscillator display nucleons nucleus. nucleon orbital neutron cigarlike probability. proven analytically functions. nucleons shells enhancement neutron guration. neutron guration longterm goal geometric insight nuclei nucleons valence

exact_dup

46776484

10.1007/s10877-005-0679-9

International audienceGrids have emerged as a promising technology to handle the data and compute intensive requirements of many application areas. Digital medical image processing is a promising application area for grids. Given the volume of data, the sensitivity of medical information, and the joint complexity of medical datasets and computations expected in clinical practice, the challenge is to fill the gap between the grid middleware and the requirements of clinical applications. The research project AGIR (Grid Analysis of Radiological Data) presented in this paper addresses this challenge through a combined approach: on one hand, leveraging the grid middleware through core grid medical services which target the requirements of medical data processing applications; on the other hand, grid-enabling a panel of applications ranging from algorithmic research to clinical applications

Grid-enabling medical image analysis

grid-enabling medical image analysis

audiencegrids emerged promising handle intensive areas. digital promising grids. datasets computations challenge fill middleware applications. agir radiological addresses challenge leveraging middleware enabling ranging algorithmic

exact_dup

46778354

10.1016/j.nimb.2006.09.009

We present a dosimeter prototype, devoted to ion beam dosimetry, tested with Helium, Carbon and Neon ions having an equivalent range in water of 150 mm. A polyvinyltoluene based plastic scintillator is used to convert the deposited energy into scintillation, a measurement probe and a long optical fibre guide the light to a photon counting unit. Using 10–40 μm thick scintillators we show that the dosimeter gain is enough to provide useful measurements, the ion-induced scintillation can be interpreted using a model taking into account the energy deposited by secondary electrons. For a practical purpose it is shown that a linear relationship can be established between the scintillation signal and the relative dose

Polyvinyltoluene scintillators for relative ion dosimetry: An investigation with Helium, Carbon and Neon beams

polyvinyltoluene scintillators for relative ion dosimetry: an investigation with helium, carbon and neon beams

dosimeter prototype devoted dosimetry helium neon polyvinyltoluene plastic scintillator convert deposited scintillation fibre guide counting unit. thick scintillators dosimeter scintillation interpreted deposited electrons. practical scintillation

exact_dup

46778630

10.1016/j.physc.2006.03.116

IPN Orsay is strongly involved within the EURISOL and EUROTRANS projects, especially collaborating to the overall design of their linac architecture. Since a few years, main part of the R&D work is dedicated to the development of superconducting spoke cavities and their associated components (RF coupler, tuning system horizontal cryomodule, etc.). Following the very promising results obtained with our first single-spoke prototype (2-gap, 352 MHz, beta 0.35), a new prototype has been designed and fabricated (2-gap, 352 MHz, beta 0.15) in order to be integrated in a future linac. The mechanical and RF tests, done on this prototype, are presented. Then, an overview of the latest beam dynamics calculations performed to design a linac using spoke cavities will be described

Development of spoke cavities for the EURISOL and EUROTRANS projects

development of spoke cavities for the eurisol and eurotrans projects

orsay eurisol eurotrans projects collaborating linac architecture. dedicated superconducting spoke cavities coupler tuning cryomodule etc. promising spoke prototype beta prototype fabricated beta linac. prototype presented. overview latest linac spoke cavities

exact_dup

46779033

10.1007/s10955-006-9197-5

Pour publication dans "Journal of Statistical Physics"The diffusion over a simple parabolic barrier is exactly solved with a non-Markovian Generalized Langevin Equation. For a short relaxation time, the problem is shown to be similar to a Markovian one, with a smaller effective friction. But for longer relaxation time, the average trajectory starts to oscillate and the system can have a very fast first passage over the barrier. For very long relaxation times, the solution tends to a zero-friction limi

Non-Markovian diffusion over a saddle with a Generalized Langevin equation

non-markovian diffusion over a saddle with a generalized langevin equation

pour publication dans parabolic barrier solved markovian langevin equation. relaxation markovian friction. relaxation trajectory starts oscillate passage barrier. relaxation tends friction limi

exact_dup

46779795

10.1016/j.nima.2006.01.107

24 pages, Submitted to NIM A - Collaboration 04-63 : Gamma spectroscopy towards super heavy nuclei at the FLNRWith the aid of the Geant4 Monte Carlo simulation package a new detection system has been designed for the focal plane of the recoil separator VASSILISSA situated at the Flerov Laboratory of Nuclear Reactions, JINR, Dubna. GABRIELA (Gamma Alpha Beta Recoil Investigations with the Electromagnetic Analyser VASSILISSA) has been optimised to detect the arrival of reaction products and their subsequent radioactive decays involving the emission of alpha- and beta-particles, fission fragments, gamma- and X-rays, and conversion electrons. The new detector system is described and the results of the first commissioning experiments are presented

GABRIELA : a new detector array for gamma-ray and conversion electron spectroscopy of transfermium elements.

gabriela : a new detector array for gamma-ray and conversion electron spectroscopy of transfermium elements.

pages submitted gamma spectroscopy super nuclei flnrwith geant monte carlo package focal recoil separator vassilissa situated flerov jinr dubna. gabriela gamma alpha beta recoil investigations electromagnetic analyser vassilissa optimised detect arrival radioactive decays involving alpha beta fission fragments gamma rays conversion electrons. commissioning

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47105763

10.1051/0004-6361:20065779

Reproduced with permission. Copyright ESO. Article published by EDP Sciences and available at http://www.aanda.org.International audienceAims. The Karin cluster is a small asteroid family that formed 5.8±0.2 Myr ago in the outer main belt. This is an exceptionally young age for an asteroid family. To investigate the composition and homogeneity of the members of this family, we started a spectroscopic survey in the visible and in the near-IR. Methods. We observed 24 Karin asteroid members in the visible and 6 members in the near-IR. Results. In the visible range, all the objects share the same characteristics: a maximum around λ = 0.75 μm, and a spectral slope spanning a continuous but limited range; in the NIR, our spectra show a similar behaviour. Our results suggest global homogeneity of the parent body and none of the investigated objects seems to be an interloper. These results are consistent with the dynamical hypothesis of a common origin. Finally, the range of spectral slopes is similar with the range of slopes for OC meteorites.We interpret this result as an indication of a low degree of spatial alteration for the observed surfaces. This result is coherent with the young age of the family

Physical characterization of the Karin family

physical characterization of the karin family

reproduced permission. copyright eso. .international audienceaims. karin asteroid outer belt. exceptionally asteroid family. homogeneity started spectroscopic visible methods. karin asteroid visible results. visible share spanning behaviour. homogeneity parent none interloper. origin. slopes slopes meteorites.we interpret indication alteration surfaces. coherent

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47291065

10.1007/978-3-662-43459-8_24

Part 6: Experience ReportInternational audienceIn this paper we look at opportunities to support the creation of value for all through the use of end-user-owned Virtual Personal Assistant. We use a chat-bot as example of technology with a possibility for transferring and diffusing new functionality, features and capabilities. This category of software can create potential value through its AI and natural language processing combined with emulation and imitation of emotional engagement which is personal, private and as such allows for intimate contextual relevance to be developed

Personalized Support with ‘Little’ Data

personalized support with ‘little’ data

reportinternational audiencein look opportunities creation owned virtual personal assistant. chat transferring diffusing functionality capabilities. create emulation imitation emotional engagement personal private intimate contextual relevance

exact_dup

47767278

10.1007/s00186-010-0341-2

ED EPSInternational audienceFinding a solution concept is one of the central problems in cooperative game theory, and the notion of core is the most popular solution concept since it is based on some rationality condition. In many real situations, not all possible coalitions can form, so that classical TU-games cannot be used. An interesting case is when possible coalitions are defined through a partial ordering of the players (or hierarchy). Then feasible coalitions correspond to teams of players, that is, one or several players with all their subordinates. In these situations, the core in its usual formulation may be unbounded, making its use difficult in practice. We propose a new notion of core, called the restricted core, which imposes efficiency of the allocation at each level of the hierarchy, is always bounded, and answers the problem of sharing benefits in a hierarchy. We show that the core we defined has properties very close to the classical case, with respect to marginal vectors, the Weber set, and balancedness

The restricted core of games on distributive lattices: how to share benefits in a hierarchy

the restricted core of games on distributive lattices: how to share benefits in a hierarchy

epsinternational audiencefinding cooperative game notion popular rationality condition. situations coalitions games used. coalitions ordering players hierarchy feasible coalitions teams players players subordinates. situations usual formulation unbounded practice. propose notion restricted imposes allocation hierarchy answers sharing benefits hierarchy. marginal weber balancedness

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47842758

10.1016/j.mathsocsci.2007.12.001

International audienceWe show on a 4x4 example that many dynamics may eliminate all strategies used in correlated equilibria, and this for an open set of games. This holds for the best-response dynamics, the Brown-von Neumann-Nash dynamics and any monotonic or weakly sign-preserving dynamics satisfying some standard regularity conditions. For the replicator dynamics and the best-response dynamics, elimination of all strategies used in correlated equilibrium is shown to be robust to the addition of mixed strategies as new pure strategies

Evolutionary Dynamics May Eliminate All Strategies Used in Correlated Equilibria

evolutionary dynamics may eliminate all strategies used in correlated equilibria

audiencewe eliminate equilibria games. brown neumann nash monotonic weakly preserving satisfying regularity conditions. replicator elimination robust

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48157106

10.1038/ismej.2013.250

Plateforme Génomique Environnementale, OSURInternational audienceThe subsurface realm is colonized by microbial communities to depths of >1000 meters below the seafloor (m.b.sf.), but little is known about overall diversity and microbial distribution patterns at the most profound depths. Here we show that not only Bacteria and Archaea but also Eukarya occur at record depths in the subseafloor of the Canterbury Basin. Shifts in microbial community composition along a core of nearly 2 km reflect vertical taxa zonation influenced by sediment depth. Representatives of some microbial taxa were also cultivated using methods mimicking in situ conditions. These results suggest that diverse microorganisms persist down to 1922 m.b.sf. in the seafloor of the Canterbury Basin and extend the previously known depth limits of microbial evidence (i) from 159 to 1740 m.b.sf. for Eukarya and (ii) from 518 to 1922 m.b.sf. for Bacteria

Microorganisms persist at record depths in the subseafloor of the Canterbury Basin.

microorganisms persist at record depths in the subseafloor of the canterbury basin.

plateforme génomique environnementale osurinternational audiencethe subsurface realm colonized microbial communities depths meters seafloor m.b.sf. diversity microbial profound depths. bacteria archaea eukarya record depths subseafloor canterbury basin. shifts microbial nearly reflect taxa zonation influenced sediment depth. representatives microbial taxa cultivated mimicking situ conditions. diverse microorganisms persist m.b.sf. seafloor canterbury basin extend microbial m.b.sf. eukarya m.b.sf. bacteria

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48185753

10.1016/j.tecto.2014.05.034

International audienceSituated along the western termination of the Eastern Kunlun Mountains, the Qimen Tagh Range represents a key area to understand the Cenozoic basin-range interactions between the northeastern Tibetan Plateau and the Qaidam Basin. Within that region, several huge bow-like fault systems such as the Kunbei and Qimen Tagh fault systems accommodate the transpressive deformation but their kinematic evolution is still highly debated. Newly acquired seismic profiles and isopach maps of the Late Eocene sediments strongly suggest that the Kunbei fault system (consisting of the Kunbei, Arlar and Hongliuquan faults) in the southwestern Qadaim Basin was initially a left-lateral strike-slip fault system rather than a thrusting system. Growth strata indicate an Early Miocene onset age for this strike-slip deformation. However, earthquake focal mechanisms show that the present-day tectonic pattern of this fault system is dominated by NE-SW transpression. As for the Qimen Tagh fault system, numerous linear geomorphic features and fault scarps indicate that it was again a strike-slip fault system. Deformed sediments within the Adatan Valley prove that strike-slip motion prevailed during the Pleistocene, yet the present day deformation is marked by NE-SW transpression. Collectively, the Kunbei and Qimen Tagh fault systems were initially left-lateral strike-slip fault systems that formed during Early Miocene and Pleistocene respectively. Colligating with these southward younging left-lateral strike-slip faulting ages and the fact that these convex-northward structures converge to the center segment of active Kunlun fault in the east, we thus considered the Kunbei and Qimen Tagh fault systems as former western segments of the Kunlun fault once located further south in the present-day location of that fault. These faults gradually migrated northward since the Early Miocene while their kinematics changed from left-lateral strike-slip motion to NE-SW transpression

Northward growth of the Qimen Tagh Range: A new model accounting for the Late Neogene strike-slip deformation of the SW Qaidam Basin

northward growth of the qimen tagh range: a new model accounting for the late neogene strike-slip deformation of the sw qaidam basin

audiencesituated termination eastern kunlun mountains qimen tagh cenozoic basin northeastern tibetan plateau qaidam basin. huge fault kunbei qimen tagh fault accommodate transpressive deformation kinematic debated. newly acquired seismic isopach eocene sediments kunbei fault consisting kunbei arlar hongliuquan faults southwestern qadaim basin initially lateral strike slip fault thrusting system. strata miocene onset strike slip deformation. earthquake focal tectonic fault dominated transpression. qimen tagh fault numerous geomorphic fault scarps strike slip fault system. deformed sediments adatan valley strike slip prevailed pleistocene deformation marked transpression. collectively kunbei qimen tagh fault initially lateral strike slip fault miocene pleistocene respectively. colligating southward younging lateral strike slip faulting ages convex northward converge segment kunlun fault east kunbei qimen tagh fault former segments kunlun fault fault. faults gradually migrated northward miocene kinematics changed lateral strike slip transpression

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48343511

10.1007/s10640-006-9075-2

International audienceWe analyse a disregarded environmental policy instrument: a switch in government expenditure away from energy (or other natural resources) and toward a composite good which includes energy-saving expenditure. We first develop two variants of an analytical general equilibrium model. A composite good is produced with constant returns to scale, and energy is imported or produced domestically with diminishing returns, yielding a differential rent to its owners. The government purchases energy and composite goods from private firms. Such a policy unambiguously increases employment. It also raises private consumption and welfare under two conditions: (i) it is not too costly and (ii) the initial share of the resource is smaller in public spending than in private consumption, or the difference is small enough. We then run numerically a model featuring both importation and domestic production of energy (oil, gas and electricity), for the OECD as a whole. Simulations show that employment, welfare and private consumption rise. We provide magnitudes for different parameter values

General equilibrium impact of an energy-saving policy in the public sector

general equilibrium impact of an energy-saving policy in the public sector

audiencewe analyse disregarded instrument switch expenditure away toward composite saving expenditure. variants model. composite returns imported domestically diminishing returns yielding rent owners. purchases composite goods private firms. unambiguously employment. raises private welfare costly share resource spending private enough. numerically featuring importation domestic electricity oecd whole. employment welfare private rise. magnitudes

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49268277

10.1016/j.atmosres.2016.02.006

International audienceGas and aerosol chemistry of 10 km -resolution mesoscale models Meso-NH and WRF/CHEM were evaluated on three cases over Europe. These one-day duration cases were selected from Freney et al. (2011) and occurred on contrasted meteorological conditions and at different seasons: a cyclonic circulation with a well-marked frontal zone on winter, an anti-cyclonic situation with local storm precipitations on summer and a cold front in the northwest of Europe associated to a convergence of air masses over eastern Europe and conflicting air masses over Spain and France on autumn. To assess the performance of the two models, surface hourly databases from observation stations over Europe were used, together with airborne measurements. For both models, the meteorological fields were in good agreement with the measurements for the three days. Winds presented the largest normalized mean bias integrated over all European stations for both models. Daily gas chemistry was reproduced with normalized mean biases between -14 and 11 %, a level of accuracy that is acceptable for policy support. The two models performances were degraded during night-time quite likely due to the constant primary species emissions. The PM2.5 bulk mass concentration was overestimated by Meso-NH over Europe and slightly underestimated by WRF/CHEM. The absence of wet deposition in the models partly explains the local discrepancies with the observations. More locally, the systematic low mixing ratio of volatile organic compounds in the gas phase simulated by WRF/CHEM at three stations was correlated with the underestimation of OM (Organic Matter) mass in the aerosol phase. Moreover, this mass of OM was mainly composed of anthropogenic POA (Primary Organic Aerosols) in WRF/CHEM, suggesting a missing source for SOA (Secondary Organic Aerosols) mass in WRF/CHEM aerosol parameterization. The contribution of OM was well simulated by Meso-NH, with a higher contribution for the summer case. For Meso-NH, SOA made the major contribution to the OM mass. The simulation of the mass of SO42- in particles by both models was often overestimated and correlated with an underestimation of the SO2 mixing ratio. The simulated masses of NO3- and NH4+ in particles were always higher for Meso-NH than for WRF/CHEM, which was linked to a difference in NOX mixing ratio between the models. Finally, computations of model performance criterion and model performance goals show that both models can be considered acceptable for standard modelling applications. In particular, Meso-NH model, using a gaseous chemical mechanism designed to compute the organic precursors of aerosols, shows comparable simulated amounts of SOA to observations at local sites

Evaluation of Meso-NH and WRF/CHEM simulated gas and aerosol chemistry over Europe based on hourly observations

evaluation of meso-nh and wrf/chem simulated gas and aerosol chemistry over europe based on hourly observations

audiencegas aerosol mesoscale meso europe. freney occurred contrasted meteorological seasons cyclonic circulation marked frontal winter cyclonic storm precipitations summer cold front northwest europe eastern europe conflicting spain autumn. hourly databases stations europe airborne measurements. meteorological days. winds stations models. reproduced biases acceptable support. performances degraded night emissions. overestimated meso europe underestimated chem. deposition partly explains discrepancies observations. locally volatile stations underestimation aerosol phase. composed anthropogenic aerosols missing aerosols aerosol parameterization. meso summer case. meso mass. overestimated underestimation ratio. meso models. computations criterion goals acceptable applications. meso gaseous precursors aerosols comparable amounts

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49283973

10.1007/s10874-007-9073-y

International audienceThe Model of Multiphase Cloud Chemistry M2C2 has recently been extended to account for nucleation scavenging of aerosol particles in the cloud water chemical composition. This extended version has been applied to multiphase measurements available at the Puy de Dôme station for typical wintertime anthropogenic air masses. The simulated ion concentrations in cloud water are in reasonable agreement with the experimental data. The analysis of the sources of the chemical species in cloud water shows an important contribution from nucleation scavenging of particles which prevails for nitrate, sulphate and ammonium. Moreover, the simulation shows that iron, which comes only from the dissolution of aerosol particles in cloud water, has a significant contribution in the hydroxyl radical production. Finally, the simulated phase partitioning of chemical species in cloud are compared with measurements. Numerical results show an underestimation of interstitial particulate phase fraction with respect to the measurements, which could be due to an overestimation of activated mass by the model. However, the simulated number scavenging efficiency of particles agrees well with the measured value of 40% of total number of aerosol particles activated in cloud droplets. Concerning the origin of chemical species in cloud water, the model reproduces quite well the contribution of gas and aerosol scavenging estimated from measurements. In addition, the simulation provides the contribution of in-cloud chemical reactivity to cloud water concentrations

Numerical quantification of sources and phase partitioning of chemical species in cloud: Application to wintertime anthropogenic air masses at the Puy de Dôme station

numerical quantification of sources and phase partitioning of chemical species in cloud: application to wintertime anthropogenic air masses at the puy de dôme station

audiencethe multiphase nucleation scavenging aerosol composition. multiphase dôme station wintertime anthropogenic masses. reasonable data. nucleation scavenging prevails nitrate sulphate ammonium. iron comes dissolution aerosol hydroxyl radical production. partitioning measurements. underestimation interstitial particulate overestimation model. scavenging agrees aerosol droplets. concerning reproduces aerosol scavenging measurements. reactivity

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49292693

10.1016/j.sedgeo.2012.09.010

International audienceThe present study focused on turbidite sedimentation in the Cilaos turbidite system, a volcaniclastic deep-sea fan recently recognized offshore La Réunion Island. A set of piston cores was collected in order to establish the stratigraphy of this fan and to examine the processes controlling the turbidite sedimentation off the Cilaos cirque (Piton des Neiges volcanic massif) over the last climatic cycle. Two main phases of turbidite activity were identified, during the ca 140-127 ka and 30-0 ka periods, coinciding with the two last glacial-interglacial transitions (i.e., Terminations II and I). In addition to changes in climate and eustatic sea-level, these periods coincide with a low effusive volcanic activity of the Piton des Neiges volcano. The high erosional rates identified in the Cilaos cirque during these intervals of both low effusive volcanic activity and enhanced rainfall level are probably the main driver of sediment supply to the deep‐sea depositional system. These new findings also highlight the important capacity of volcaniclastic turbidite systems to record rapid paleoenvironmental changes

Processes controlling a volcaniclastic turbiditic system during the last climatic cycle: Example of the Cilaos deep-sea fan, offshore La Réunion Island

processes controlling a volcaniclastic turbiditic system during the last climatic cycle: example of the cilaos deep-sea fan, offshore la réunion island

audiencethe focused turbidite sedimentation cilaos turbidite volcaniclastic recognized offshore réunion island. piston cores establish stratigraphy examine controlling turbidite sedimentation cilaos cirque piton neiges volcanic massif climatic cycle. turbidite coinciding glacial interglacial i.e. terminations eustatic coincide effusive volcanic piton neiges volcano. erosional cilaos cirque intervals effusive volcanic rainfall probably driver sediment supply deep‐sea depositional system. highlight volcaniclastic turbidite record paleoenvironmental

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50537821

10.1016/j.anihpc.2013.10.001

International audienceWe study the dynamics of phenotypically structured populations in environments with fluctuations. In particular, using novel arguments from the theories of Hamilton-Jacobi equations with constraints and homogenization, we obtain results about the evolution of populations in environments with time oscillations, the development of concentrations in the form of Dirac masses, the location of the dominant traits and their evolution in time. Such questions have already been studied in time homogeneous environments. More precisely we consider the dynamics of a phenotypically structured population in a changing environment under mutations and competition for a single resource. The mathematical model is a non-local parabolic equation with a periodic in time reaction term. We study the asymptotic behavior of the solutions in the limit of small diffusion and fast reaction. Under concavity assumptions on the reaction term, we prove that the solution converges to a Dirac mass whose evolution in time is driven by a Hamilton-Jacobi equation with constraint and an effective growth/death rate which is derived as a homogenization limit. We also prove that, after long-time, the population concentrates on a trait where the maximum of an effective growth rate is attained. Finally we provide an example showing that the time oscillations may lead to a strict increase of the asymptotic population size

Time fluctuations in a population model of adaptive dynamics

time fluctuations in a population model of adaptive dynamics

audiencewe phenotypically structured environments fluctuations. arguments hamilton jacobi homogenization environments oscillations dirac traits time. homogeneous environments. precisely phenotypically structured changing competition resource. mathematical parabolic term. asymptotic reaction. concavity assumptions converges dirac hamilton jacobi homogenization limit. concentrates trait attained. oscillations strict asymptotic

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50615178

10.1080/01691864.2014.955824

International audienceThe paper deals with geometric and elastostatic calibration of robotic manipulator using partial pose measurements, which do not provide the end-effector orientation. The main attention is paid to the efficiency improvement of identification procedure. In contrast to previous works, the developed calibration technique is based on the direct measurements only. To improve the identification accuracy, it is proposed to use several reference points for each manipulator configuration. This allows avoiding the problem of non-homogeneity of the least-square objective, which arises in the classical identification technique with the full-pose information (position and orientation). Its efficiency is confirmed by the comparison analysis, which deals with the accuracy evaluation of different identification strategies. The obtained theoretical results have been successfully applied to the geometric and elastostatic calibration of serial industrial robot employed in a machining work-cell for aerospace industry

Geometric and elastostatic calibration of robotic manipulator using partial pose measurements

geometric and elastostatic calibration of robotic manipulator using partial pose measurements

audiencethe deals geometric elastostatic calibration robotic manipulator pose effector orientation. paid procedure. calibration only. manipulator configuration. avoiding homogeneity arises pose confirmed deals strategies. successfully geometric elastostatic calibration serial industrial robot machining aerospace

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50618392

10.1016/j.progsolidstchem.2005.11.039

International audienceA new process for preparing oligonucleotide arrays is described that uses surface grafting chemistry which is fundamentally different from the electrostatic adsorption and organic covalent binding methods normally employed. Solid supports are modified with a mixed organic/inorganic zirconium phosphonate monolayer film providing a stable, well-defined interface. Oligonucleotide probes terminated with phosphate are spotted directly to the zirconated surface forming a covalent linkage. Specific binding of terminal phosphate groups with minimal binding of the internal phosphate diesters has been demonstrated. On the other hand, the reaction of a bisphosphonate bone resorption inhibitor (Zoledronate) with calcium deficient apatites (CDAs) was studied as a potential route to local drug delivery systems active against bone resorption disorders. A simple mathematical model of the Zoledronate/CDA interaction was designed that correctly described the adsorption of Zoledronate onto CDAs. The resulting Zoledronate-loaded materials were found to release the drug in different phosphate-containing media, with a satisfactory agreement between experimental data and the values predicted from the model

Novel phosphate–phosphonate hybrid nanomaterials applied to biology

novel phosphate–phosphonate hybrid nanomaterials applied to biology

audiencea preparing oligonucleotide arrays grafting fundamentally electrostatic adsorption covalent normally employed. supports inorganic zirconium phosphonate monolayer film interface. oligonucleotide probes terminated phosphate spotted zirconated forming covalent linkage. phosphate phosphate diesters demonstrated. bisphosphonate resorption inhibitor zoledronate calcium deficient apatites cdas route delivery resorption disorders. mathematical zoledronate correctly adsorption zoledronate cdas. zoledronate loaded phosphate satisfactory

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51224817

10.1093/bioinformatics/btu317

published online, to appear in printInternational audienceSeveral state-of-the-art methods for isoform identification and quantification are based on l1- regularized regression, such as the Lasso. However, explicitly listing the--possibly exponentially-- large set of candidate transcripts is intractable for genes with many exons. For this reason, existing approaches using the l1-penalty are either restricted to genes with few exons, or only run the regression algorithm on a small set of pre-selected isoforms. We introduce a new technique called FlipFlop which can efficiently tackle the sparse estimation problem on the full set of candidate isoforms by using network flow optimization. Our technique removes the need of a preselection step, leading to better isoform identification while keeping a low computational cost. Experiments with synthetic and real RNA-Seq data confirm that our approach is more accurate than alternative methods and one of the fastest available. Source code is freely available as an R package from the Bioconductor web site (http://www.bioconductor.org/) and more information is available at http://cbio.ensmp.fr/flipflop

Efficient RNA Isoform Identification and Quantification from RNA-Seq Data with Network Flows

efficient rna isoform identification and quantification from rna-seq data with network flows

printinternational audienceseveral isoform quantification regularized lasso. explicitly listing possibly exponentially candidate transcripts intractable exons. penalty restricted exons isoforms. flipflop efficiently tackle sparse candidate isoforms optimization. removes preselection isoform keeping cost. synthetic confirm fastest available. freely package bioconductor

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51234225

10.1007/s10765-008-0386-0

International audiencePolymer micro-organisation can be modified by combination of the three constraints, thermal, hydrostatic and fluid sorption. In selecting the fluid's nature, chemically active or inert, and its physical state, liquid or supercritical, new “materials” can be generated. In addition, the interplay of temperature and pressure allows tailoring the obtained material structure for specific applications. Several complementary techniques have been developed to modify, analyze and characterize the end products: scanning transitiometry, vibrating wire (VW)-PVT coupling, thermoporosimetry, temperature modulated DSC (TMDSC), sorptometry. The great variety of possible applications in materials science is illustrated with different polymers which can produce materials from soft gel to rigid foams when submitted to fluid sorption, typical fluids being methane, or a simple gas (CO2 or N2). Absorption of an appropriate fluid in a cross linked polymer leads to a swelling phenomenon. Thermoporosimetry is a calorimetric technique developed to measure the shift by confinement of thermal transition temperatures of the swelling fluids, which can be currently used solvents or mercury. Application of thermoporosimetry to a swollen cross linked polymer allows to calculate the mesh size distribution and to evaluate the degree of reticulation of the polymer. The same technique can be applied to characterise the pore size distribution in a foamed polymer

Polymer Microstructures. Modification and Characterisation by Fluid Sorption

polymer microstructures. modification and characterisation by fluid sorption

audiencepolymer micro organisation hydrostatic sorption. selecting chemically inert supercritical “materials” generated. interplay tailoring applications. complementary modify analyze characterize scanning transitiometry vibrating wire thermoporosimetry modulated tmdsc sorptometry. great illustrated polymers rigid foams submitted sorption fluids methane polymer swelling phenomenon. thermoporosimetry calorimetric confinement swelling fluids solvents mercury. thermoporosimetry swollen polymer mesh reticulation polymer. characterise pore foamed polymer

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51930884

10.1093/gji/ggt183

International audienceNo major earthquake occurred in North Chile since the 1877 M w 8.6 subduction earthquake that produced a huge tsunami. However, geodetic measurements conducted over the last decade in this area show that the upper plate is actually deforming, which reveals some degree of locking on the subduction interface. This accumulation of elastic deformation is likely to be released in a future earthquake. Because of the long elapsed time since 1877 and the rapid accumulation of deformation (thought to be 6–7 cm/yr), many consider this area is a mature seismic gap where a major earthquake is due and seismic hazard is high. We present a new Global Positioning System (GPS) velocity field, acquired between 2008 and 2012, that describes in some detail the interseismic deformation between 18°S and 24°S. We invert for coupling distribution on the Nazca-South America subduction interface using elastic modelling. Our measurements require that, at these latitudes, 10 to 12 mm yr−1 (i.e. 15 per cent of the whole convergence rate) are accommodated by the clockwise rotation of an Andean block bounded to the East by the subandean fold-and-thrust belt. This reduces the accumulation rate on the subduction interface to 56 mm yr−1 in this area. Coupling variations on the subduction interface both along-strike and along-dip are described. We find that the North Chile seismic gap is segmented in at least two highly locked segments bounded by narrow areas of weak coupling. This coupling segmentation is consistent with our knowledge of the historical ruptures and of the instrumental seismicity of the region. Intersegment zones (Iquique, Mejillones) correlate with high background seismic rate and local tectonic complexities on the upper or downgoing plates. The rupture of either the Paranal or the Loa segment alone could easily produce a Mw 8.0–8.3 rupture, and we propose that the Loa segment (from 22.5◦S to 20.8◦S) may be the one that ruptured in 1877

Revisiting the North Chile seismic gap segmentation using GPS-derived interseismic coupling

revisiting the north chile seismic gap segmentation using gps-derived interseismic coupling

audienceno earthquake occurred chile subduction earthquake huge tsunami. geodetic decade plate deforming reveals locking subduction interface. accumulation elastic deformation released earthquake. elapsed accumulation deformation thought mature seismic earthquake seismic hazard high. positioning acquired describes interseismic deformation invert nazca america subduction elastic modelling. latitudes i.e. cent accommodated clockwise andean east subandean thrust belt. reduces accumulation subduction area. subduction strike described. chile seismic segmented locked segments narrow coupling. segmentation historical ruptures instrumental seismicity region. intersegment zones iquique mejillones correlate seismic tectonic complexities downgoing plates. rupture paranal segment rupture propose segment ruptured

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51949807

10.1016/j.neuroimage.2014.03.043

International audienceThe localization of brain sources based on EEG measurements is a topic that has attracted a lot of attention in the last decades and many different source localization algorithms have been proposed. However, their performance is limited in the case of several simultaneously active brain regions and low signal-to-noise ratios. To overcome these problems, tensor-based preprocessing can be applied, which consists in constructing a space-time-frequency (STF) or space-time-wave-vector (STWV) tensor and decomposing it using the Canonical Polyadic (CP) decomposition. In this paper, we present a new algorithm for the accurate localization of extended sources based on the results of the tensor decomposition. Furthermore, we conduct a detailed study of the tensor-based preprocessing methods, including an analysis of their theoretical foundation, their computational complexity, and their performance for realistic simulated data in comparison to conventional source localization algorithms such as sLORETA, cortical LORETA (cLORETA), and 4-ExSo-MUSIC. Our objective consists, on the one hand, in demonstrating the gain in performance that can be achieved by tensor-based preprocessing, and, on the other hand, in pointing out the limits and drawbacks of this method. Finally, we validate the STF and STWV techniques on real measurements to demonstrate their usefulness for practical applications

EEG extended source localization: Tensor-based vs. conventional methods.

eeg extended source localization: tensor-based vs. conventional methods.

audiencethe localization topic attracted decades localization proposed. simultaneously ratios. overcome preprocessing constructing stwv decomposing canonical polyadic decomposition. localization decomposition. conduct preprocessing foundation realistic localization sloreta cortical loreta cloreta exso music. demonstrating preprocessing pointing drawbacks method. validate stwv usefulness practical

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52199294

10.1016/j.neurobiolaging.2006.08.006

International audienceRare studies have used magnetic resonance imaging (MRI) and voxel-based morphometry (VBM) to assess atrophy, and only two positron emission tomography (PET) studies used SPM to examine functional changes in semantic dementia (SD). Our aim was to highlight both morphological and functional abnormalities in a same group of 10 SD patients, in the entire brain, using a "state of the art" methodology (optimized VBM procedure, PET data corrected for partial volume effects and voxel-based analyses). We also used an extensive neuropsychological battery. We showed that main alterations concerned the left temporal lobe, in accordance with the striking impairment of semantic memory in SD patients, as well as the hippocampal region, which may partly explain their moderate episodic memory deficits. Hypometabolism was more extensive than grey matter loss in both temporal lobes, and specifically concerned the orbitofrontal areas, consistent with the moderate impairment of executive functions and behavioural changes. While PET is more sensitive than MRI, there is striking concordance between morphological and functional abnormalities, which contrasts with the discordance observed in Alzheimer's disease and might be a typical feature of SD

Anatomical and functional alterations in semantic dementia: a voxel-based MRI and PET study.

anatomical and functional alterations in semantic dementia: a voxel-based mri and pet study.

audiencerare voxel morphometry atrophy positron tomography examine semantic dementia highlight morphological abnormalities methodology optimized corrected voxel extensive neuropsychological battery. alterations concerned lobe accordance striking impairment semantic hippocampal partly moderate episodic deficits. hypometabolism extensive grey lobes concerned orbitofrontal moderate impairment executive behavioural changes. striking concordance morphological abnormalities contrasts discordance alzheimer

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52199613

10.1007/s11238-007-9061-3

International audienceThe aim of the paper is to propose a preferences representation model under risk where risk perception can be past experience dependent. A first step consists in considering a one period decision problem where individual preferences are no more defined only on decisions but on pairs (decision, past experience). The obtained criterion is used in the construction of a dynamic choice model under risk. The paper ends with an illustrative example concerning insurance demand. It<br />appears that our model allows to explain modifications in the insurance demand behavior over time observed on the insurance markets for catastrophic risk and difficult to justify with standard models

Dynamic Decision Making when Risk Perception Depends on Past Experience

dynamic decision making when risk perception depends on past experience

audiencethe propose preferences perception dependent. preferences decisions criterion risk. ends illustrative concerning insurance demand. modifications insurance insurance markets catastrophic justify

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52296993

10.1016/j.crte.2014.04.001

International audienceWe present a framework for simulating the measurement of seismic anisotropy in a model inner core by computing travel time residuals of synthetic seismic rays propagated through the model. The method is first tested on simple inner core structural models consisting of layers with distinct anisotropy, as often proposed in the literature. Those models are not consistent with geodynamics. Hence, we extend the method to a numerically grown inner core composed of ε-Fe with flow generated from an excess of crystallization in the equatorial belt, inducing polycrystalline textures. The global inner core anisotropy is 7 times smaller than that of the single crystal. Compositional stratification amplifies the global anisotropy by 15% while the addition of solidification textures reduces it by a factor of 2. As such, and within the tested geodynamical models, no published elastic model of ε-Fe at inner core conditions allows for reproducing the 3% cylindrical anisotropy reported in seismology publications. In addition, our models demonstrate that additional information such as the depth dependence and the spread of the observed anisotropy is a key for revealing the dynamics and history of the inner core

Seismic response and anisotropy of a model hcp iron inner core

seismic response and anisotropy of a model hcp iron inner core

audiencewe simulating seismic anisotropy travel residuals synthetic seismic rays propagated model. consisting anisotropy literature. geodynamics. extend numerically grown composed excess crystallization equatorial belt inducing polycrystalline textures. anisotropy crystal. compositional stratification amplifies anisotropy solidification textures reduces geodynamical elastic reproducing cylindrical anisotropy seismology publications. spread anisotropy revealing

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52301103

10.1088/1367-2630/14/1/013044

International audienceWe study different types of stationary dynamos observed in the Von Karman sodium (VKS) experiment when varying the electromagneticboundary conditions on (and in) the impellers. The flow is driven with two impellers made of soft iron (Monchaux et al 2007 Phys Rev. Lett. 98 044502)or using one soft-iron impeller and one stainless steel impeller. The magnetic field is mapped using 40 three-dimensional probes distributed within the flow and its surroundings. Symmetry and coupling properties are then retrieved from direct probe measurements and/or from the field structure as reconstructed using the inversion procedure described by Boisson and Dubrulle (2011 New J. Phys. 13 023037). Several salient results are obtained: (i) dynamo action is not achieved unless at least one iron impeller is rotating, at a frequency larger than 15 Hz; (ii) the resulting dynamo is a dipolar, mostly axisymmetric structure; and (iii) the self-sustained magnetic field properties depend on the sodium flow structure between the two impellers. We propose to interpret the stationary dynamos generation as the (constructive or destructive) superposition of two one-impeller fluid dynamos generated close to the soft-iron impellers, nonlinearly coupled through the turbulent flow, as suggested by Verhille et al (2010 New J. Phys. 12 033006). The normal form equation describing this coupling is similar to the one obtained in a theoretical model (Petrelis et al 2009 Phys. Rev. Lett. 102 144503)

Symmetry and couplings in stationary von Kármán Sodium dynamos

symmetry and couplings in stationary von kármán sodium dynamos

audiencewe stationary dynamos karman sodium electromagneticboundary impellers. impellers iron monchaux rev. lett. iron impeller stainless steel impeller. mapped probes surroundings. retrieved reconstructed inversion boisson dubrulle phys. salient dynamo unless iron impeller rotating dynamo dipolar mostly axisymmetric sustained sodium impellers. propose interpret stationary dynamos constructive destructive superposition impeller dynamos iron impellers nonlinearly turbulent verhille phys. describing petrelis phys. rev. lett.

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52429301

10.1016/j.chemgeo.2014.04.015

International audienceContinental margins receive natural and anthropogenic trace elements (TEs) from direct atmospheric deposition of aerosols onto the sea surface and from advection of riverine suspended particles and/or resuspended sediments from the continental shelf/slope. When the margin is incised by submarine canyons, as for example in the Northwestern Mediterranean Sea, most of these particles are preferentially transferred via these topographic features towards their final repositories in the abyssal plain. The Gulf of Lions (GoL) shelf receives the largest particulate riverine input to the Western Mediterranean, with its associated chemical contaminants originating from the industrialized and urbanized Rhone Valley. Sediments samples (grabs, cores and moored traps) collected in the Cap de Creus (CdC) Canyon and its adjacent areas at the Southwestern exit of the GoL were analyzed to explore the origin, dispersion, transfer and accumulation of a suite of TEs (Ag, Cd, Co, Cr, Cu, Ni, Pb, Zn and V) from the GoL shelf to the adjacent continental rise. Distributions of Cu, Cr, Ni, Pb, Zn and V in the surface sediments of the shelf confirm their terrigenous origin in association with clay minerals, whereas Ag and Cd are more associated with organic matter (OM). All these TEs are anthropogenically enriched in the Rhone prodelta sediments. Anthropogenic influence remains clearly discernible in the GoL shelf surface sediments for Ag, Pb and Zn. Hydrodynamical resuspension and sorting of shelf sediments occur at the head of the CdC Canyon during dense shelf-water cascading events. During these events, the material collected in moored sediment traps contains a higher coarse carbonate fraction slightly impoverished in TEs compared to the clays of the nepheloid layer and the organically-rich particles deposited before and at the end of the cascading period. Upper and middle canyon sediments are characterized by high sedimentation rates (~ 0.2 cm yr − 1) of fine clay material. Conversely, sediments from the lower continental slope and rise exhibit low sedimentation rates (~ 0.06 cm yr − 1) and receive carbonaceous planktonic detritus from the water column. At the lower continental slope, coarse material includes foraminifers and pteropods, whereas at the continental rise finer planktonic-derived material is more abundant. Both in the CdC Canyon and in its adjacent lower continental slope/rise sediments, Co, Cu, Cr, Ni and V are associated with clay, whereas Ag, Cu and Pb are preferentially associated with OM. Cadmium, Cr, and Zn are also associated with OM in canyon sediments. Carbonaceous plankton appears to be especially efficient for scavenging Ag, Zn and Pb are diluted by biogenic carbonates. An authigenic Mn fraction is enriched with Co and Ni. Lead and Zn concentration levels and vertical profile patterns, along with Pb stable isotopic ratios, indicate that significant parts of Pb and Zn are of anthropogenic origin. A sediment chronology based on 210 Pb dating reveals that Pb anthropization, mainly from gasoline additives, culminated between 1960 and 1980, being the current concentrations > 40% lower than 30 years ago. A similar distribution is observed for Zn, which originates mainly from combustion processes; but the reduction of Zn contamination amounts to only 20% during the same period. The largest anthropogenic Pb accumulation occurs in the middle part of CdC Canyon, with an inventory of 200 μg cm − 2. At the most distal part of the continental rise anthropogenic Pb accumulation within the first ~ 10 cm below the surface sediment is estimated around 10 μg cm − 2 , which is similar to the direct atmospheric deposition estimate. Highlights ► We study trace element (TE) in NW-Mediterranean margin sediments ► TE are hosted by different sediment fractions (clay, organic and authigenic matter) ► Cascading sorts the material transported to canyons and affects its TE composition ► Anthropogenic TE accumulated in canyon sediments, with maximum in 1960–70 AD ► Ag is strongly associated with carbonaceous planktonic remain

Origin and Accumulation of Trace Elements in Sediments of the Northwestern Mediterranean Margin

origin and accumulation of trace elements in sediments of the northwestern mediterranean margin

audiencecontinental margins receive anthropogenic trace deposition aerosols advection riverine suspended resuspended sediments continental shelf slope. margin incised submarine canyons northwestern mediterranean preferentially transferred topographic repositories abyssal plain. gulf lions shelf receives particulate riverine mediterranean contaminants originating industrialized urbanized rhone valley. sediments grabs cores moored traps creus canyon adjacent southwestern exit explore accumulation suite shelf adjacent continental rise. sediments shelf confirm terrigenous clay minerals anthropogenically enriched rhone prodelta sediments. anthropogenic discernible shelf sediments hydrodynamical resuspension sorting shelf sediments canyon dense shelf cascading events. moored sediment traps coarse carbonate impoverished clays nepheloid organically deposited cascading period. canyon sediments sedimentation fine clay material. conversely sediments continental exhibit sedimentation receive carbonaceous planktonic detritus column. continental coarse foraminifers pteropods continental finer planktonic abundant. canyon adjacent continental sediments clay preferentially cadmium canyon sediments. carbonaceous plankton scavenging diluted biogenic carbonates. authigenic enriched isotopic anthropogenic origin. sediment chronology dating reveals anthropization gasoline additives culminated ago. originates combustion contamination amounts period. anthropogenic accumulation canyon inventory distal continental anthropogenic accumulation sediment deposition estimate. highlights trace mediterranean margin sediments hosted sediment fractions clay authigenic cascading sorts transported canyons affects anthropogenic accumulated canyon sediments carbonaceous planktonic

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52456923

10.1051/0004-6361:200810842

Context: A number of microlensing dark-matter surveys have produced tens of millions of light curves of individual background stars. These data provide an unprecedented opportunity for systematic studies of whole classes of variable stars and their host galaxies. Aims: We aim to use the EROS-2 survey of the Magellanic Clouds to detect and study the population of beat Cepheids (BCs) in both Clouds. BCs pulsating simultaneously in the first overtone and fundamental modes (FO/F) or in the second and first overtone modes (SO/FO) are of particular interest. Methods: Using special software designed to search for periodic variables, we have scanned the EROS-2 data base for variables in the typical period range of Cepheids. Metallicities of FO/F objects were then calculated from linear nonadiabatic convective stellar models. Results: We identify 74 FO/F BCs in the LMC and 41 in the SMC, and 173 and 129 SO/FO pulsators in the LMC and SMC, respectively; 185 of these stars are new discoveries. For nearly all the FO/F objects we determine minimum, mean, and maximum values of the metallicity. Conclusions: The EROS data have expanded the samples of known BCs in the LMC by 31%, in the SMC by 110%. The FO/F objects provide independent measures of metallicities in these galaxies. The mean value of metallicity is 0.0045 in the LMC and 0.0018 in the SMC. Based on observations made by the EROS-2 collaboration with the MARLY telescope at the European Southern Observatory, La Silla, Chile. Data tables are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/495/24

The beat Cepheids in the Magellanic Clouds: an analysis from the EROS-2 database

the beat cepheids in the magellanic clouds: an analysis from the eros-2 database

microlensing surveys tens millions stars. unprecedented opportunity galaxies. aims eros magellanic clouds detect beat cepheids clouds. pulsating simultaneously overtone overtone interest. scanned eros cepheids. metallicities nonadiabatic convective models. pulsators discoveries. nearly metallicity. eros expanded metallicities galaxies. metallicity smc. eros marly telescope southern observatory silla chile. tables anonymous cdsarc.u cdsweb.u qcat

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52474320

10.1016/j.physletb.2004.08.021

LAL 04-99Exotic hadrons made of five quarks (pentaquarks) are searched for in hadronic Z decays collected by the ALEPH detector at LEP. No significant signal is observed. At 95% C.L., upper limits are set on the production rates N of such particles and their charge-conjugate state per Z decay: N Theta(1535)+ . BR(Theta(1535)^+ -> pK0s < 6.2 x 10^-4, N Xi(1862)-- . BR(Xi(1862)^-- -> xi^- pi^-) < 4.5 x 10^-4, N Xi(1862)^0 . BR(Xi(1862)^0 -> Xi^-pi^+ < 8.9 x 10^-4, N Theta_c(3100)^0 . BR(Theta_c(3100)^0 -> D*-p) < 6.3 x 10^-4, N Theta_c(3100)^0 . BR(Theta_c(3100)^0 -> D^-p) < 31 x 10^-4

Search for pentaquark states in Z decays

search for pentaquark states in z decays

exotic hadrons quarks pentaquarks searched hadronic decays aleph lep. observed. c.l. conjugate theta theta theta theta theta theta

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52665053

10.1016/j.aquatox.2014.05.016

International audienceXenoestrogens may persist in the environment by binding to sediments or suspended particulate matter serving as long-term reservoir and source of exposure, particularly for organisms living in or in contact with sediments. In this study, we present for the first time an effect-directed analysis (EDA) for identifying estrogenic compounds in a sediment sample using embryos of a transgenic reporter fish strain. In the tg(cyp19a1b-GFP) transgenic zebrafish strain, the expression of GFP (green fluorescent protein) in the brain is driven by an oestrogen responsive element in the promoter of the cyp19a1b (aromatase) gene. The selected sediment sample of the Czech river Bilina had already been analysed in a previous EDA using the yeast oestrogen screening assay and had revealed fractions containing estrogenic compounds. When normal phase HPLC (high performance liquid chromatography) fractionation was used for the separation of the sediment sample, the biotest with transgenic fish embryos revealed two estrogenic fractions. Chemical analysis of candidate compounds in these sediment fractions suggested alkylphenols and estrone as candidate compounds responsible for the observed estrogenic effect. Alkylphenol concentrations could partially explain the estrogenicity of the fractions. However, xenoestrogens below the analytical detection limit or non-targeted estrogenic compounds have probably also contributed to the sample's estrogenic potency. The results indicated the suitability of the tg(cyp19a1b-GFP) fish embryo for an integrated chemical-biological analysis of estrogenic effects

Effect-directed analysis for estrogenic compounds in a fluvial sediment sample using transgenic cyp19a1b-GFP zebrafish embryos.

effect-directed analysis for estrogenic compounds in a fluvial sediment sample using transgenic cyp19a1b-gfp zebrafish embryos.

audiencexenoestrogens persist sediments suspended particulate serving reservoir organisms living sediments. directed identifying estrogenic sediment embryos transgenic reporter fish strain. transgenic zebrafish fluorescent oestrogen responsive promoter aromatase gene. sediment czech river bilina analysed yeast oestrogen screening fractions estrogenic compounds. hplc chromatography fractionation sediment biotest transgenic fish embryos estrogenic fractions. candidate sediment fractions alkylphenols estrone candidate estrogenic effect. alkylphenol partially estrogenicity fractions. xenoestrogens targeted estrogenic probably contributed estrogenic potency. suitability fish embryo estrogenic

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52671156

10.1063/1.4923443

International audienceDifferent electron acceleration regimes in the evanescent field of a surface plasma wave are studied by considering the interaction of a test electron with the high-frequency electromagnetic field of a surface wave. The non-relativistic and relativistic limits are investigated. Simple scalings are founddemonstrating the possibility to achieve an efficient conversion of the surface wave field energy into electron kinetic energy. This mechanism of electron acceleration can provide a high-frequency pulsed source of relativistic electrons with a well defined energy. In the relativistic limit, the most energetic electrons are obtained in the so-called electromagnetic regime for surface waves. In this regime, the particles are accelerated to velocities larger than the wave phase velocity, mainly in the direction parallel to the plasma-vacuum interface

Simple scalings for various regimes of electron acceleration in surface plasma waves

simple scalings for various regimes of electron acceleration in surface plasma waves

audiencedifferent acceleration regimes evanescent electromagnetic wave. relativistic relativistic investigated. scalings founddemonstrating conversion energy. acceleration pulsed relativistic energy. relativistic energetic electromagnetic waves. accelerated velocities

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52675650

10.1074/mcp.M114.038075

International audienceSerine-rich (Srr) proteins exposed at the surface of Gram-positive bacteria are a family of adhesins that contribute to the virulence of pathogenic staphylococci and streptococci. Lectin-binding experiments have previously shown that Srr proteins are heavily glycosylated. We report here the first mass-spectrometry analysis of the glycosylation of Streptococcus agalactiae Srr1. After Srr1 enrichment and trypsin digestion, potential glycopeptides were identified in collision induced dissociation spectra using X! Tandem. The approach was then refined using higher energy collisional dissociation fragmentation which led to the simultaneous loss of sugar residues, production of diagnostic oxonium ions and backbone fragmentation for glycopeptides. This feature was exploited in a new open source software tool (SpectrumFinder) developed for this work. By combining these approaches, 27 glycopeptides corresponding to six different segments of the N-terminal region of Srr1 [93-639] were identified. Our data unambiguously indicate that the same protein residue can be modified with different glycan combinations including N-acetylhexosamine, hexose, and a novel modification that was identified as O-acetylated-N-acetylhexosamine. Lectin binding and monosaccharide composition analysis strongly suggested that HexNAc and Hex correspond to N-acetylglucosamine and glucose, respectively. The same protein segment can be modified with a variety of glycans generating a wide structural diversity of Srr1. Electron transfer dissociation was used to assign glycosylation sites leading to the unambiguous identification of six serines and one threonine residues. Analysis of purified Srr1 produced in mutant strains lacking accessory glycosyltransferase encoding genes demonstrates that O-GlcNAcylation is an initial step in Srr1 glycosylation that is likely required for subsequent decoration with Hex. In summary, our data obtained by a combination of fragmentation mass spectrometry techniques associated to a new software tool, demonstrate glycosylation heterogeneity of Srr1, characterize a new protein modification, and identify six glycosylation sites located in the N-terminal region of the protein

O-Glycosylation of the N-terminal region of the serine-rich adhesin Srr1 of Streptococcus agalactiae explored by mass spectrometry.

o-glycosylation of the n-terminal region of the serine-rich adhesin srr1 of streptococcus agalactiae explored by mass spectrometry.

audienceserine exposed gram bacteria adhesins virulence pathogenic staphylococci streptococci. lectin heavily glycosylated. spectrometry glycosylation streptococcus agalactiae enrichment trypsin digestion glycopeptides collision dissociation tandem. refined collisional dissociation fragmentation simultaneous sugar diagnostic oxonium backbone fragmentation glycopeptides. exploited spectrumfinder work. combining glycopeptides segments identified. unambiguously residue glycan combinations acetylhexosamine hexose modification acetylated acetylhexosamine. lectin monosaccharide hexnac acetylglucosamine glucose respectively. segment glycans generating diversity dissociation assign glycosylation unambiguous serines threonine residues. purified lacking accessory glycosyltransferase encoding demonstrates glcnacylation glycosylation decoration hex. fragmentation spectrometry glycosylation heterogeneity characterize modification glycosylation

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52678356

10.1016/j.microrel.2012.06.047

International audienceThis paper presents the electrical model of a PMOS transistor in 90nm technology under 1064nm Photoelectric Laser Stimulation. The model was built and tuned from measurements made on test structures. It permits to simulate theeffectofacontinuous wave laser on a PMOS transistor by taking into account the laser's parameters (i.e. spot size and location, orpower)andthePMOS'geometryandbias. It offers a significant gain of time by comparison with experiments and makes possible to build 3D photocurrent cartographies generated by the laser on the PMOS

Building the electrical model of the Photoelectric Laser Stimulation of a PMOS transistor in 90nm technology

building the electrical model of the photoelectric laser stimulation of a pmos transistor in 90nm technology

audiencethis presents electrical pmos transistor photoelectric stimulation. built tuned structures. permits simulate theeffectofacontinuous pmos transistor i.e. spot orpower andthepmos geometryandbias. offers build photocurrent cartographies pmos

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52679341

10.1073/pnas.1221259110

International audienceRed seaweeds are key components of coastal ecosystems and are economically important as food and as a source of gelling agents, but their genes and genomes have received little attention. Here we report the sequencing of the 105-Mbp genome of the florideophyte Chondrus crispus (Irish moss) and the annotation of the 9,606 genes. The genome features an unusual structure characterized by gene-dense regions surrounded by repeat-rich regions dominated by transposable elements. Despite its fairly large size, this genome shows features typical of compact genomes, e.g., on average only 0.3 introns per gene, short introns, low median distance between genes, small gene families, and no indication of large-scale genome duplication. The genome also gives insights into the metabolism of marine red algae and adaptations to the marine environment, including genes related to halogen metabolism, oxylipins, and multicellularity (microRNA processing and transcription factors). Particularly interesting are features related to carbohydrate metabolism, which include a minimalistic gene set for starch biosynthesis, the presence of cellulose synthases acquired before the primary endosymbiosis showing the polyphyly of cellulose synthesis in Archaeplastida, and cellulases absent in terrestrial plants as well as the occurrence of a mannosylglycerate synthase potentially originating from a marine bacterium. To explain the observations on genome structure and gene content, we propose an evolutionary scenario involving an ancestral red alga that was driven by early ecological forces to lose genes, introns, and intergenetic DNA; this loss was followed by an expansion of genome size as a consequence of activity of transposable elements

Genome structure and metabolic features in the red seaweed Chondrus crispus shed light on evolution of the Archaeplastida.

genome structure and metabolic features in the red seaweed chondrus crispus shed light on evolution of the archaeplastida.

audiencered seaweeds coastal ecosystems economically gelling genomes attention. sequencing florideophyte chondrus crispus irish moss annotation genes. unusual dense surrounded repeat dominated transposable elements. fairly genomes e.g. introns introns families indication duplication. insights metabolism marine algae adaptations marine halogen metabolism oxylipins multicellularity microrna carbohydrate metabolism minimalistic starch biosynthesis cellulose synthases acquired endosymbiosis polyphyly cellulose archaeplastida cellulases absent terrestrial occurrence mannosylglycerate synthase potentially originating marine bacterium. propose evolutionary involving ancestral alga ecological forces lose introns intergenetic transposable

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52680166

10.1016/j.nanoen.2014.07.001

This work describes the development and performance of a symmetric microsupercapacitor made of nanostructured electrodes based on silicon nanowires (SiNWs) deposited using chemical vapor deposition (CVD) on silicon substrates. The performance of the SiNWs micro-supercapacitor employing an aprotic ionic liquid (N-methyl-N-propylpyrrolidinium bis(trifluoromethylsulfonyl)imide) (PYR13TFSI) as an electrolyte was able to deliver a maximal power density of 182 mW cm-2 and a specific energy of 190 µJ cm-2 operating at a wide cell voltage of 4V with a quasi-ideal capacitive behaviour. The lifetime of the device exhibited a remarkable electrochemical stability retaining 75 % of the initial capacitance after several million galvanostatic charge-discharge cycles at a high current density of 1 mA cm-2. Furthermore, a coulombic efficiency of approximately 99 % was obtained after galvanostatic cycling test without structural degradation on the morphology of SiNWs

High performance of symmetric micro supercapacitors based on silicon nanowires using N-methyl-N-propylpyrrolidinium bis(trifluoromethylsulfonyl)imide as electrolyte

high performance of symmetric micro supercapacitors based on silicon nanowires using n-methyl-n-propylpyrrolidinium bis(trifluoromethylsulfonyl)imide as electrolyte

describes microsupercapacitor nanostructured electrodes silicon nanowires sinws deposited vapor deposition silicon substrates. sinws micro supercapacitor employing aprotic ionic methyl propylpyrrolidinium trifluoromethylsulfonyl imide tfsi electrolyte deliver maximal operating quasi ideal capacitive behaviour. lifetime exhibited remarkable electrochemical retaining capacitance million galvanostatic discharge cycles coulombic galvanostatic cycling degradation morphology sinws

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52686099

10.1051/epjap/2011100426

Flexibility will significantly expand the application scope of electronics, particularly large-area electronics. Over the last 10 years, printed organic electronic is believed to be one of the next major technological breakthroughs in the field of microelectronic and the use of printing technology to process organic field-effect transistors (OFETs) opens promising perspectives for low-cost, large-area circuits integrated on flexible, plastic substrates. With amorphous polymer-based thin film transistors acceptable electrical performances are now achieved with relatively good stability at ambient air. In the literature a lot of work has been devoted to study degradation of device characteristics under bias stress conditions but only few papers deal with the mechanical behavior. In this paper, we review our first reliability results obtained on flexible organic thin film transistors under mechanical stresses. The variations of electrical characteristics under bending tests, both in compression and tension, have been studied. Using specific equipment, we have also evaluated the reliability of transistors under cyclic bending tests. The stress dependency of the transfer characteristic deviates from the one observed for inorganic material like silicon

Reliability of OTFTs on flexible substrate: Mechanical stress effect

reliability of otfts on flexible substrate: mechanical stress effect

flexibility expand scope electronics electronics. printed believed technological breakthroughs microelectronic printing transistors ofets opens promising perspectives circuits flexible plastic substrates. amorphous polymer film transistors acceptable electrical performances ambient air. devoted degradation papers deal behavior. reliability flexible film transistors stresses. electrical bending compression tension studied. equipment reliability transistors cyclic bending tests. dependency deviates inorganic silicon

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