Datasets:

pinecone

/

core-2020-05-10-deduplication

like 1

148659243

10.1088/1742-5468/2011/06/P06022

In this paper we study some aspects of search for an immobile target\ud by a swarm of N non-communicating, randomly moving searchers (numbered by\ud the index k, k = 1, 2, . . . ,N), which all start their random motion simultaneously\ud at the same point in space. For each realization of the search process, we record\ud the unordered set of time moments {τk}, where τk is the time of the first passage\ud of the kth searcher to the location of the target. Clearly, τks are independent,\ud identically distributed random variables with the same distribution function Ψ(τ ).\ud We evaluate then the distribution P(ω) of the random variable ω ∼ τ1/¯τ ,\ud where ¯τ = N−1N\ud k=1 τk is the ensemble-averaged realization-dependent first\ud passage time. We show that P(ω) exhibits quite a non-trivial and sometimes\ud a counterintuitive behavior. We demonstrate that in some well-studied cases\ud (e.g. Brownian motion in finite d-dimensional domains) the mean first passage\ud time is not a robust measure of the search efficiency, despite the fact that Ψ(τ )\ud has moments of arbitrary order. This implies, in particular, that even in this\ud simplest case (not to mention complex systems and/or anomalous diffusion) first\ud passage data extracted from a single-particle tracking should be regarded with\ud appropriate caution because of the significant sample-to-sample fluctuations

First passages for a search by a swarm of independent random searchers

first passages for a search by a swarm of independent random searchers

immobile swarm communicating randomly moving searchers numbered simultaneously space. realization record unordered moments passage searcher target. identically ensemble averaged realization passage time. exhibits trivial sometimes counterintuitive behavior. e.g. brownian passage robust moments order. simplest mention anomalous passage tracking regarded caution

exact_dup

148660538

10.1016/j.tplants.2011.06.003

Protein-coding gene families are sets of similar genes with a shared evolutionary origin and, generally, with similar biological functions. In plants, the size and role of gene families has been only partially addressed. However, suitable bioinformatics tools are being developed to cluster the enormous number of sequences currently available in databases. Specifically, comparative genomic databases promise to become powerful tools for gene family annotation in plant clades. In this review, I evaluate the data retrieved from various gene family databases, the ease with which they can be extracted and how useful the extracted information is

Plant protein-coding gene families: emerging bioinformatics approaches

plant protein-coding gene families: emerging bioinformatics approaches

coding families shared evolutionary functions. families partially addressed. bioinformatics enormous databases. comparative genomic databases promise powerful annotation clades. retrieved databases ease

exact_dup

148660810

10.1016/j.anbehav.2011.07.001

Various environmental factors may influence the foraging behaviour of seed dispersers which could ultimately affect the seed dispersal process. We examined whether moonlight levels and the presence or absence of rodentshelter affect rodentseedremoval (rate, handling time and time of removal) and seedselection (size and species) among seven oak species. The presence or absence of safe microhabitats was found to be more important than moonlight levels in the removal of seeds. Bright moonlight caused a different temporal distribution of seedremoval throughout the night but only affected the overall removal rates in open microhabitats. Seeds were removed more rapidly in open microhabitat (regardless of the moon phase), decreasing the time allocated to seed discrimination and translocation. Only in open microhabitats did increasing levels of moonlight decrease the time allocated to selection and removal of seeds. As a result, a more precise seedselection was made under shelter, owing to lower levels of predation risk. Rodent ranking preference for species was identical between full/new moon in shelter but not in open microhabitats. For all treatments, species selection by rodents was much stronger than size selection. Nevertheless, heavy seeds, which require more energy and time to be transported, were preferentially removed under shelter, where there is no time restriction to move the seeds. Our findings reveal that seedselection is safety dependent and, therefore, microhabitats in which seeds are located (sheltered versus exposed) and moonlight levels in open areas should be taken into account in rodent food selection studies

Moonlight and shelter cause differential seed selection and removal by rodents

moonlight and shelter cause differential seed selection and removal by rodents

foraging seed dispersers ultimately seed dispersal process. moonlight rodentshelter rodentseedremoval handling removal seedselection seven species. safe microhabitats moonlight removal seeds. bright moonlight seedremoval night removal microhabitats. seeds removed rapidly microhabitat regardless moon decreasing allocated seed discrimination translocation. microhabitats moonlight allocated removal seeds. precise seedselection shelter owing predation risk. rodent ranking preference moon shelter microhabitats. treatments rodents stronger selection. nevertheless seeds transported preferentially removed shelter restriction move seeds. reveal seedselection microhabitats seeds sheltered exposed moonlight rodent

exact_dup

148663668

10.1016/j.atmosenv.2013.01.013

The need for a better quantification of the influence of Saharan dust transport processes on the air quality modelling in the Mediterranean basin led to the formulation of a dust emission module (DEM) integrated into the Air Quality Risk Assessment System for the Iberian Peninsula (SERCA). This paper is focused on the formulation of DEM based on the GOCART aerosol model, along with its integration and execution into the air quality model. It also addresses the testing of the module and its evaluation by contrasting results against satellite products such as MODIS and CALIPSO and ground-level observations of aerosol optical thickness (AOT) and concentration levels of PM10 for different periods in July 2007. DEM was found capable of reproducing the spatial (horizontal and vertical) and temporal profiles of Saharan dust outbreaks into the Mediterranean basin and the Atlantic coast of Africa. Moreover, it was observed that its combination with CMAQ increased the correlation degree between observed and modelled PM10 concentrations at the selected monitoring locations. DEM also enhanced CMAQ capabilities to reproduce observed AOT, although significant underestimations remain. The implementation of CMAQ + DEM succeeded in capturing Saharan dust transport into the Iberian Peninsula, with contributions up to 25 and 14 μg m−3 in 1 h and 24 h average PM10 respectively. The general improvement of total PM10 predictions in Spain are however moderate. The analysis of model performance for the main PM components points out that remaining PM10 underestimation is due to dust local sources missing in the inventories and misrepresentation of organic aerosol processes, which constitutes the main areas for future improvement of CMAQ capabilities to simulate particulate matter within SERCA

Modelling Saharan dust transport into the Mediterranean basin with CMAQ

modelling saharan dust transport into the mediterranean basin with cmaq

quantification saharan mediterranean basin formulation module iberian peninsula serca focused formulation gocart aerosol execution model. addresses module contrasting satellite modis calipso aerosol capable reproducing saharan outbreaks mediterranean basin atlantic coast africa. cmaq modelled locations. cmaq capabilities reproduce underestimations remain. cmaq succeeded capturing saharan iberian peninsula respectively. spain moderate. underestimation missing inventories misrepresentation aerosol constitutes cmaq capabilities simulate particulate serca

exact_dup

148664103

10.1016/j.compeleceng.2012.03.010

IP Multimedia Subsystem (IMS) is considered to provide multimedia services to users through an IP-based control plane. The current IMS service invocation mechanism, however, requires the Serving-Call Session Control Function (S-CSCF) invokes each Application Server (AS) sequentially to perform service subscription pro?le, which results in the heavy load of the S-CSCF and the long session set-up delay. To solve this issue, this paper proposes a linear chained service invocation mechanism to invoke each AS consecutively. By checking all the initial Filter Criteria (iFC) one-time and adding the addresses of all involved ASs to the ?Route? header, this new approach enables multiple services to be invoked as a linear chain during a session. We model the service invocation mechanisms through Jackson networks, which are validated through simulations. The analytic results verify that the linear chained service invocation mechanism can effectively reduce session set-up delay of the service layer and decrease the load level of the S-CSC

A linear chained approach for service invocation in IP multimedia subsystem.

a linear chained approach for service invocation in ip multimedia subsystem.

multimedia subsystem multimedia plane. invocation serving call session cscf invokes server sequentially subscription cscf session delay. solve proposes chained invocation invoke consecutively. checking filter adding addresses route header enables invoked session. invocation jackson validated simulations. analytic verify chained invocation effectively session delay

exact_dup

148664422

10.1002/pip.1127

The quality and the reliability of the power generated by large grid-connected photovoltaic (PV) plants are negatively affected by the source characteristic variability. This paper deals with the smoothing of power fluctuations because of geographical dispersion of PV systems. The fluctuation frequency and the maximum fluctuation registered at a PV plant ensemble are analyzed to study these effects. We propose an empirical expression to compare the fluctuation attenuation because of both the size and the number of PV plants grouped. The convolution of single PV plants frequency distribution functions has turned out to be a successful tool to statistically describe the behavior of an ensemble of PV plants and determine their maximum output fluctuation. Our work is based on experimental 1-s data collected throughout 2009 from seven PV plants, 20 MWp in total, separated between 6 and 360 km

Smoothing of PV power fluctuations by geographical dispersion

smoothing of pv power fluctuations by geographical dispersion

reliability photovoltaic negatively variability. deals smoothing geographical systems. fluctuation fluctuation registered ensemble effects. propose fluctuation attenuation grouped. convolution turned successful statistically ensemble fluctuation. seven separated

exact_dup

148664718

10.1016/j.anifeedsci.2012.09.002

The correlations between chemical composition and coefficient of standardized ileal digestibility (CSID) of crude protein (CP) and amino acids (AA) were determined in 22 soybean meal (SBM) samples originated from USA (n = 8), Brazil (BRA; n = 7) and Argentina (ARG; n = 7) in 21-day old broilers. Birds were fed a commercial maize-SBM diet from 1 to 17 days of age followed by the experimental diets in which the SBM tested was the only source of protein (205 g CP/kg) for three days. Also, in vitro nitrogen (N) digestion study was conducted with these samples using the two-step enzymatic method. The coefficient of apparent ileal digestibility (CAID) of the SBM, independent of the origin, varied from 0.820 to 0.880 for CP, 0.850 to 0.905 for lysine (Lys), 0.859 to 0.907 for methionine (Met) and 0.664 to 0.750 for cysteine (Cys). The corresponding CSID values varied from 0.850 to 0.966 for CP, 0.891 to 0.940 for Lys, 0.931 to 0.970 for Met and 0.786 to 0.855 for Cys. The CSID of CP and Lys of the SBM were positively correlated with CP (r = 0.514; P menor que 0.05 and r = 0.370; P = 0.09, respectively), KOH solubility (KOH sol.) (r = 0.696; P menor que 0.001 and r = 0.619; P menor que 0.01, respectively), trypsin inhibitor activity (TIA) (r = 0.541; P menor que 0.01 and r = 0.416; P = 0.05, respectively) and reactive Lys (r = 0.563; P menor que 0.01 and r = 0.486; P menor que 0.05) values, but no relation was observed with neutral detergent fiber and oligosaccharide content. No relation between the CSID of CP determined in vivo and N digestibility determined in vitro was found. The CSID of most key AA were higher for the USA and the BRA meals than for the ARG meals. For Lys, the CSID was 0.921, 0.919 and 0.908 (P menor que 0.05) and for Cys 0.828, 0.833 and 0.800 (P menor que 0.01) for USA, BRA and ARG meals, respectively. It is concluded that under the conditions of this experiment, the CSID of CP and Lys increased with CP content, KOH sol., TIA and reactive Lys values of the SBM. The CSID of most limiting AA, including Lys and Cys, were higher for USA and BRA meals than for ARG meals

Correlation between ileal digestibility of amino acids and chemical composition of soybean meals in broilers at 21 days of age

correlation between ileal digestibility of amino acids and chemical composition of soybean meals in broilers at 21 days of age

standardized ileal digestibility csid crude soybean meal originated brazil argentina broilers. birds commercial maize diet diets days. nitrogen digestion enzymatic method. apparent ileal digestibility caid varied lysine methionine cysteine csid varied cys. csid positively menor solubility sol. menor menor trypsin inhibitor menor reactive menor menor neutral detergent fiber oligosaccharide content. csid digestibility found. csid meals meals. csid menor menor meals respectively. concluded csid sol. reactive sbm. csid limiting meals meals

exact_dup

148668348

10.1063/1.4822236

A temperature accelerated life test on commercial concentrator lattice-matched GaInP/GaInAs/Ge triple-junction solar cells has been carried out. The solar cells have been tested at three different temperatures: 119, 126 and 164 °C and the nominal photo-current condition (820 X) has been emulated by injecting current in darkness. All the solar cells have presented catastrophic failures. The failure distributions at the three tested temperatures have been fitted to an Arrhenius-Weibull model. An Arrhenius activation energy of 1.58 eV was determined from the fit. The main reliability functions and parameters (reliability function, instantaneous failure rate, mean time to failure, warranty time) of these solar cells at the nominal working temperature (80 °C) have been obtained. The warranty time obtained for a failure population of 5 % has been 69 years. Thus, a long-term warranty could be offered for these particular solar cells working at 820 X, 8 hours per day at 80 °C

Evaluation of the reliability of commercial concentrator triple-junction solar cells by means of accelerated life tests (ALT)

evaluation of the reliability of commercial concentrator triple-junction solar cells by means of accelerated life tests (alt)

accelerated commercial concentrator matched gainp gainas triple junction out. nominal photo emulated injecting darkness. catastrophic failures. fitted arrhenius weibull model. arrhenius fit. reliability reliability instantaneous warranty nominal obtained. warranty years. warranty offered

exact_dup

148676278

10.1049/iet-its.2014.0205

With the continuous development in the fields of sensors, advanced data processing and communications, road transport oriented intelligent applications and services have reached a significant maturity and complexity. Cooperative ITS services, based on the idea of sharing accurate information among road entities, are currently being tested on a large scale by different initiatives. The field operational test (FOTsis) project contributes to the deployment environment with services that involve a significant number of entities out of the vehicle. This made necessary the specification of an architecture which, based on the ISO ITS station reference architecture for communications, could support the requirements of the services proposed in the project. During the project, internal implementation tests and external interoperability tests have resulted in the validation of the proposed architecture. At the same time, these tests have had as a result the awareness of areas in which the FOTsis architecture could be completed, mainly to take full advantage of all the emerging and foreseeable data sources which may be relevant in the road environment. In this study, the authors will outline an approach that, based on the current cooperative ITS architecture and the SmartCities and Internet Of Things (IoT) architectures, can provide a common convergence platform to maximise the information available for ITS purposes

Cooperative ITS communications architecture: the FOTsis project approach and beyond

cooperative its communications architecture: the fotsis project approach and beyond

sensors advanced communications road oriented intelligent reached maturity complexity. cooperative sharing road entities initiatives. operational fotsis contributes deployment involve entities vehicle. specification architecture station architecture communications project. interoperability resulted validation architecture. awareness fotsis architecture completed advantage emerging foreseeable road environment. outline cooperative architecture smartcities internet things architectures platform maximise purposes

exact_dup

150211677

10.1016/j.asoc.2014.01.010

Producción CientíficaIn social choice voting, majorities based on difference of votes and their extension, majorities based on difference in support, implement the crisp preference values (votes) and the intensities of preference provided by voters when comparing pairs of alternatives, respectively. The aim of these rules is declaring which alternative is socially preferred and to that, they require the winner alternative to reach a certain positive difference in its social valuation with respect to the one reached by the loser alternative. This paper introduces a new aggregation rule that extends majorities based on difference of votes from the context of crisp preferences to the framework of linguistic preferences. Under linguistic majorities with difference in support, voters express their intensities of preference between pairs of alternatives using linguistic labels and an alternative defeats another one when a specific support, fixed before the election process, is reached. There exist two main representation methodologies of linguistic preferences: the cardinal one based on the use of fuzzy sets, and the ordinal one based on the use of the 2-tuples. Linguistic majorities with difference in support are formalised in both representation settings, and conditions are given to guarantee that fuzzy linguistic majorities and 2-tuple linguistic majorities are mathematically isomorphic. Finally, linguistic majorities based on difference in support are proved to verify relevant normative properties: anonymity, neutrality, monotonicity, weak Pareto and cancellativeness.Ministerio de Economía, Industria y Competitividad (Projects ECO2009–07332)Ministerio de Economía, Industria y Competitividad (Project ECO2012–32178)Ministerio de Economía, Industria y Competitividad (Project ECO2012-34202

Linguistic majorities with difference in support

linguistic majorities with difference in support

producción científicain voting majorities votes majorities implement crisp preference votes intensities preference voters alternatives respectively. declaring socially preferred winner valuation reached loser alternative. introduces aggregation extends majorities votes crisp preferences linguistic preferences. linguistic majorities voters express intensities preference alternatives linguistic labels defeats election reached. methodologies linguistic preferences cardinal fuzzy ordinal tuples. linguistic majorities formalised settings guarantee fuzzy linguistic majorities tuple linguistic majorities mathematically isomorphic. linguistic majorities proved verify normative anonymity neutrality monotonicity pareto cancellativeness.ministerio economía industria competitividad projects ministerio economía industria competitividad ministerio economía industria competitividad

exact_dup

156963771

10.1007/s13272-016-0215-2

With the increased use of unmanned aerial systems (UAS) for civil and commercial applications, there is a strong demand for new regulations and technology that will eventually permit for the integration of UAS in unsegregated airspace. This requires new technology to ensure sufficient safety and a smooth integration process. The absence of a pilot on board a vehicle introduces new problems that do not arise in manned flight. One challenging and safety-critical issue is flight in known icing conditions. Whereas in manned flight, dealing with icing is left to the pilot and his appraisal of the situation at hand; in unmanned flight, this is no longer an option and new solutions are required. To address this, an icing-related decision-making system (IRDMS) is proposed. The system quantifies in-flight icing based on changes in aircraft performance and measurements of environmental properties, and evaluates what the effects on the aircraft are. Based on this, it determines whether the aircraft can proceed, and whether and which available icing protection systems should be activated. In this way, advice on an appropriate response is given to the operator on the ground, to ensure safe continuation of the flight and avoid possible accidents

Decision-making for unmanned aerial vehicle operation in icing conditions

decision-making for unmanned aerial vehicle operation in icing conditions

unmanned aerial civil commercial regulations eventually permit unsegregated airspace. ensure process. pilot board vehicle introduces arise manned flight. challenging flight icing conditions. manned flight dealing icing pilot appraisal unmanned flight option required. icing irdms proposed. quantifies flight icing aircraft evaluates aircraft are. determines aircraft proceed icing protection activated. advice ensure safe continuation flight avoid accidents

exact_dup

157866991

10.1007/s11245-015-9322-7

When dealing with a certain class of physical systems, the mathematical characterization of a generic system aims to describe the phase portrait of all its possible states. Because they are defined only up to isomorphism, the mathematical objects involved are ‘‘schematic struc- tures’’. If one imposes the condition that these mathemat- ical definitions completely capture the physical information of a given system, one is led to a strong requirement of individuation for physical states. However, we show there are not enough qualitatively distinct properties in an abstract Hilbert space to fulfill such a requirement. It thus appears there is a fundamental tension between the physi- cist’s purpose in providing a mathematical definition of a mechanical system and a feature of the basic formalism used in the theory. We will show how group theory pro- vides tools to overcome this tension and to define physical properties

The Mathematical Description of a Generic Physical System

the mathematical description of a generic physical system

dealing mathematical generic aims portrait states. isomorphism mathematical ‘‘schematic struc tures’’. imposes mathemat ical definitions capture requirement individuation states. qualitatively hilbert fulfill requirement. tension physi cist’s mathematical formalism theory. vides overcome tension

exact_dup

157868164

10.1007/s13194-017-0178-0

We introduce a novel point of view on the “models as mediators” framework in order to emphasize certain important epistemological questions about models in science which have so far been little investigated. To illustrate how this perspective can help answer these kinds of questions, we explore the use of simplified models in high energy physics research beyond the Standard Model. We show in detail how the construction of simplified models is grounded in the need to mitigate pressing epistemic problems concerning the uncertainty inherent in the present theoretical and experimental contexts

Simplified Models: A Different Perspective on Models as Mediators

simplified models: a different perspective on models as mediators

“models mediators” emphasize epistemological investigated. illustrate perspective answer kinds explore simplified model. simplified grounded mitigate pressing epistemic concerning inherent contexts

exact_dup

160113881

10.1007/s13194-017-0190-4

The goal of this paper is to show how scientific explanation functions in the context of idealized models. It argues that the aspect of explanation most urgently requiring investigation is the nature of the connection between global theories and explanatory local models. This aspect is neglected in traditional accounts of explanation (Hempel 1965; Kitcher 1989). The paper examines causal, minimal model, and structural accounts of model-based explanation (Woodward 2003; Batterman and Rice 2014; Bokulich 2011). It argues that they too fail to offer an account of the connection with global theory that can justify the explanatory power of an idealized local model, and consequently these accounts are unable effectively to distinguish explanatory from non-explanatory models. On the account proposed here, scientific explanation requires theoretical integration between the local model described in the explanation and a global theory with independent explanatory power

Explanatory integration

explanatory integration

goal explanation idealized models. argues aspect explanation urgently requiring connection explanatory models. aspect neglected traditional accounts explanation hempel kitcher examines causal accounts explanation woodward batterman rice bokulich argues fail offer connection justify explanatory idealized accounts unable effectively distinguish explanatory explanatory models. explanation explanation explanatory

exact_dup

161399752

10.1007/s00253-017-8123-x

As Pichia pastoris (syn. Komagataella sp.) yeast can secrete pure recombinant proteins at high rates, it is a desirable production system. The function of a novel synthetic variant of the AOX1 promoter was characterised comprehensively using a strain secreting Candida antarctica lipase B (CALB) as a model. A new time-saving approach was introduced to determine, in only one experiment, the hitherto unknown relationship between specific product formation rate (qp) and specific growth rate (μ). Tight control of recombinant protein formation was possible in the absence of methanol, while using glycerol as a sole carbon/energy source. CALB was not synthesised during batch cultivation in excess glycerol (>10 g l-1) and at a growth rate close to μmax (0.15 h−1). Between 0.017 and 0.115 h−1 in glycerol-limited fedbatch cultures, basal levels of qp > 0.4 mg g−1 h−1 CALB were reached, independent of the μ at which the culture grew. At μ > 0.04 h−1, an elevated qp occurred temporarily during the first 20 h after changing to fedbatch mode and decreased thereafter to basal. In order to accelerate the determination of the qp(μ) relationship (kinetics of product formation), the entire μ range was covered in a single fedbatch experiment. By linearly increasing and decreasing glycerol addition rates, μ values were repeatedly shifted from 0.004 to 0.074 h−1 and vice versa. Changes in qp were related to changes in μ. A rough estimation of μ range suitable for production was possible in a single fedbatch, thus significantly reducing the experimental input over previous approaches comprising several experiments

Effects of glycerol supply and specific growth rate on methanol-free production of CALB by P. pastoris : functional characterisation of a novel promoter

effects of glycerol supply and specific growth rate on methanol-free production of calb by p. pastoris : functional characterisation of a novel promoter

pichia pastoris syn. komagataella yeast secrete recombinant desirable system. synthetic variant promoter characterised comprehensively secreting candida antarctica lipase calb model. saving hitherto unknown tight recombinant methanol glycerol sole source. calb synthesised batch cultivation excess glycerol μmax glycerol fedbatch cultures basal calb reached grew. elevated occurred temporarily changing fedbatch thereafter basal. accelerate kinetics covered fedbatch experiment. linearly decreasing glycerol repeatedly shifted vice versa. rough fedbatch reducing comprising

exact_dup

161704887

10.1088/1752-7155/10/3/036005

The persistence of aroma compounds in breath after swallowing is an important attribute of the overall aroma experience during eating and drinking. It is mainly related to the coating of the oral tract with food residues and the interaction between volatile compounds and airway mucosa. We have studied the persistence of eight compounds (2,5-dimethylpyrazine, guaiacol, 4-methylguaiacol, phenylethylalcohol, ethylbutanoate, ethyloctanoate, isoamylacetate and 2-heptanone) both in-nose and in-mouth after administration of volatiles in gas phase (vapor) to five different panelists. By using volatiles in the gas phase, only the interaction with the mucosa is highlighted and the formation of a liquid coating in the oral and tracheal airway is avoided. The physicochemical properties of the compounds, mainly polarity and vapor pressure, determine the interactions of the volatiles with the airway mucosa. The use of different breathing protocols allowed the study of the differences between nasal and oral mucosa in volatile retention, with higher persistence of volatiles obtained in-mouth. Initial concentration also affected persistence, but only for compounds with high volatility and at low concentration

Persistence of aroma volatiles in the oral and nasal cavities : real-time monitoring of decay rate in air exhaled through the nose and mouth

persistence of aroma volatiles in the oral and nasal cavities : real-time monitoring of decay rate in air exhaled through the nose and mouth

persistence aroma breath swallowing attribute aroma eating drinking. coating oral tract volatile airway mucosa. persistence eight dimethylpyrazine guaiacol methylguaiacol phenylethylalcohol ethylbutanoate ethyloctanoate isoamylacetate heptanone nose mouth administration volatiles vapor panelists. volatiles mucosa highlighted coating oral tracheal airway avoided. physicochemical polarity vapor volatiles airway mucosa. breathing protocols nasal oral mucosa volatile retention persistence volatiles mouth. persistence volatility

exact_dup

185416556

10.1080/01587919.2011.584852

This report draws primarily on the results of the recently concluded African Copyright and Access to Knowledge (ACA2K) Project (see http://www.aca2k.org/), which investigated copyright and access to learning materials in face-to-face, distance education (DE), and dual-mode tertiary educational institutions in Egypt, Ghana, Kenya, Morocco, Mozambique, Senegal, South Africa, and Uganda (Armstrong, de Beer, Kawooya, Prabhala, & Schonwetter, 2010). The project’s main research question was whether copyright laws, policies, and practices in the eight countries maximized access to learning materials. Its research methodology included legal doctrinal review, interviews, document analysis, and comparative analysis of the country findings

Key copyright issues in African distance education: a South African case study

key copyright issues in african distance education: a south african case study

draws primarily concluded african copyright copyright tertiary educational institutions egypt ghana kenya morocco mozambique senegal africa uganda armstrong beer kawooya prabhala schonwetter project’s copyright laws policies practices eight maximized materials. methodology legal doctrinal interviews document comparative

exact_dup

19126072

10.1007/s00436-005-0018-6

In the present study, fluorescent in situ hybridization (FISH) and monoclonal antibodies (MAbs) were evaluated for species-specific detection and viability determination of Giardia lamblia, Cryptosporidium parvum, and Cryptosporidium hominis in human fecal and water supply samples. A total of 50 fecal human samples positive for G. lamblia cysts, 38 positive for C. parvum, and 23 positive for C. hominis were studied. Also, 18 water supply samples positive for Giardia spp. and Cryptosporidium spp. by the United States Environmental Protection Agency (USEPA) Method 1623 were studied by FISH and fluorescein isothiocyanate (FITC)-conjugated MAbs. Eighteen percent of the fecal samples parasitologically positive for G. lamblia presented viable and nonviable cysts, and 5% of those positive for Cryptosporidium spp. presented viable and nonviable oocysts. Of the 18 water supply samples analyzed, 6 (33%) presented Giardia spp. viable and nonviable cysts and 2 (11%) presented viable and nonviable Cryptosporidium spp. oocysts. G. lamblia identification was confirmed by polymerase chain reaction (PCR) and sequencing of the ß-giardin gene in the fecal and water samples found positive by FISH and FITC-conjugated MAbs. C. parvum and Cryptosporidium muris were identified, by PCR and sequencing of the small subunit of ribosomal RNA gene, in seven and one water samples, respectively. Our results confirm that this technique enables simultaneous visualization, species-specific identification, and viability determination of the organisms present in human fecal and water supply samples.http://dx.doi.org/10.1007/s00436-005-0018-

Identification and determination of the viability of Giardia lamblia cysts and Cryptosporidium parvum and Cryptosporidium hominis oocysts in human fecal and water supply samples by fluorescent in situ hybridization (FISH) and monoclonal antibodies

identification and determination of the viability of giardia lamblia cysts and cryptosporidium parvum and cryptosporidium hominis oocysts in human fecal and water supply samples by fluorescent in situ hybridization (fish) and monoclonal antibodies

fluorescent situ hybridization fish monoclonal antibodies mabs viability giardia lamblia cryptosporidium parvum cryptosporidium hominis fecal supply samples. fecal lamblia cysts parvum hominis studied. supply giardia spp. cryptosporidium spp. protection agency usepa fish fluorescein isothiocyanate fitc conjugated mabs. eighteen percent fecal parasitologically lamblia viable nonviable cysts cryptosporidium spp. viable nonviable oocysts. supply giardia spp. viable nonviable cysts viable nonviable cryptosporidium spp. oocysts. lamblia confirmed polymerase sequencing giardin fecal fish fitc conjugated mabs. parvum cryptosporidium muris sequencing subunit ribosomal seven respectively. confirm enables simultaneous visualization viability organisms fecal supply samples.

exact_dup

19714871

10.1103/PhysRevLett.104.170405

In this letter we show that the field of Operator Space Theory provides a general and powerful mathematical framework for arbitrary Bell inequalities, in particular regarding the scaling of their violation within quantum mechanics. We illustrate the power of this connection by showing that bipartite quantum states with local Hilbert space dimension n can violate a Bell inequality by a factor of order $\frac{\sqrt{n}}{\log^2n}$ when observables with n possible outcomes are used. Applications to resistance to noise, Hilbert space dimension estimates and communication complexity are given

Operator Space theory: a natural framework for Bell inequalities

operator space theory: a natural framework for bell inequalities

letter powerful mathematical bell inequalities violation mechanics. illustrate connection bipartite hilbert violate bell inequality frac sqrt observables used. hilbert

exact_dup

29137742

10.1016/j.jmatprotec.2012.08.012

http://www.sciencedirect.com/science/article/pii/S0924013612002579The present paper investigates the brittle-ductile transition (BDT) of the primary shear zone during cutting of spheroidal graphite (SG) iron in the austenitization temperature range (around 1000 °C). The experimental tests were performed using a cutting test bench in the cutting speed range of 0.8 to 1.6m.s-1. The cut surfaces were studied using optical microscopy and Scanning Electron Microscope (SEM) analysis techniques. The obtained results revealed either consequent deep fractured regions governed by a brittle-cracking regime (BCR) or a crack-free cut surface governed by a ductile-shear regime (DSR) with large plastic deformations. When cutting data were discussed with respect to the influences of cutting parameters and obtained cut surface, the correlation is significantly rich. Both cut surface integrity, cutting force curves and metallographic results show a BDT indicating a change in the dominating hot cutting process mechanism. Such a transition is associated with the dynamic recrystallization promoting strain softening and hot cutting by ductile shearing

Experimental study of the brittle–ductile transition in hot cutting of SG iron specimens

experimental study of the brittle–ductile transition in hot cutting of sg iron specimens

investigates brittle ductile cutting spheroidal graphite iron austenitization cutting bench cutting microscopy scanning microscope techniques. consequent fractured governed brittle cracking crack governed ductile plastic deformations. cutting influences cutting rich. integrity cutting metallographic dominating cutting mechanism. recrystallization promoting softening cutting ductile shearing

exact_dup

30934826

10.1016/j.pt.2012.06.003

Genomic stability and maintenance of the correct chromosome number are assumed to be essential for normal development in eukaryotes. Aneuploidy is usually associated with severe abnormalities and decrease of cell fitness, but some organisms appear to rely on aneuploidy for rapid adaptation to changing environments. This\ud phenomenon is mostly described in pathogenic fungi and cancer cells. However, recent genome studies highlight the importance of Leishmania as a new model for studies on aneuploidy. Several reports revealed extensive variation in chromosome copy number, indicating that aneuploidy is a constitutive feature of this protozoan parasite genus. Aneuploidy appears to be beneficial in organisms that are primarily asexual, unicellular, and that undergo sporadic epidemic expansions, including common pathogens as well as cancer

Adaptive mechanisms in pathogens: universal aneuploidy in Leishmania

adaptive mechanisms in pathogens: universal aneuploidy in leishmania

genomic maintenance chromosome eukaryotes. aneuploidy abnormalities fitness organisms rely aneuploidy adaptation changing environments. phenomenon mostly pathogenic fungi cells. highlight leishmania aneuploidy. extensive chromosome copy aneuploidy constitutive protozoan parasite genus. aneuploidy beneficial organisms primarily asexual unicellular undergo sporadic epidemic expansions pathogens

exact_dup

33171227

10.1063/1.4816102

We present a theoretical study of the structural and electronic properties of the M-doped MgIn2S4 ternary spinel semiconductor with M = V, Cr, and Mn. All substitutions, in the normal and in the inverse structure, are analyzed. Some of these possible substitutions present intermediate-band states in the band gap with a different occupation for a spin component. It increases the possibilities of inter-band transitions and could be interesting for applications in optoelectronic devices. The contribution to, and the electronic configuration of, these intermediate bands for the octahedral and tetrahedral sites is analyzed and discussed. The study of the substitutional energies indicates that these substitutions are favorable. Comparison between the pure and doped hosts absorption coefficients shows that this deeper band opens up more photon absorption channels and could therefore increase the solar-light absorption with respect to the host

Electronic properties of doped magnesium thioindate ternary spinel in the normal and in the inverse structure

electronic properties of doped magnesium thioindate ternary spinel in the normal and in the inverse structure

doped mgin ternary spinel semiconductor substitutions analyzed. substitutions occupation component. possibilities optoelectronic devices. octahedral tetrahedral discussed. substitutional substitutions favorable. doped hosts deeper opens

exact_dup

33172489

10.1016/j.asr.2014.02.008

The low earth orbit (LEO) environment contains a large number of artificial debris, of which a significant portion is due to dead satellites and fragments of satellites resulted from explosions and in-orbit collisions. Deorbiting defunct satellites at the end of their life can\ud be achieved by a successful operation of an Electrodynamic Tether (EDT) system. The effectiveness of an EDT greatly depends on the survivability of the tether, which can become debris itself if cut by debris particles; a tether can be completely cut by debris having some minimal diameter. The objective of this paper is to develop an accurate model using power laws for debris-size ranges, in both ORDEM2000 and MASTER2009 debris flux models, to calculate tape tether survivability. The analytical model, which depends on tape dimensions (width, thickness) and orbital parameters (inclinations, altitudes) is then verified with fully numerical results to compare for\ud different orbit inclinations, altitudes and tape width for both ORDEM2000 and MASTER2009 flux data

Analysis of tape tether survival in LEO against orbital debris

analysis of tape tether survival in leo against orbital debris

earth orbit artificial debris portion dead satellites fragments satellites resulted explosions orbit collisions. deorbiting defunct satellites successful electrodynamic tether system. effectiveness greatly survivability tether debris debris tether debris diameter. laws debris ranges ordem master debris tape tether survivability. tape orbital inclinations altitudes verified orbit inclinations altitudes tape ordem master

exact_dup

33175864

10.1016/j.measurement.2015.05.032

The calibration results of one anemometer equipped with several rotors, varying their size, were analyzed. In each case, the 30-pulses pert turn output signal of the anemometer was studied using Fourier series decomposition and correlated with the anemometer factor (i.e., the anemometer transfer function). Also, a 3-cup analytical model was correlated to the data resulting from the wind tunnel measurements. Results indicate good correlation between the post-processed output signal and the working condition of the cup anemometer. This correlation was also reflected in the results from the proposed analytical model. With the present work the possibility of remotely checking cup anemometer status, indicating the presence of anomalies and, therefore, a decrease on the wind sensor reliability is revealed

On the harmonic analysis of cup anemometer rotation speed:\ud A principle to monitor performance and maintenance status\ud of rotating meteorological sensors

on the harmonic analysis of cup anemometer rotation speed:\ud a principle to monitor performance and maintenance status\ud of rotating meteorological sensors

calibration anemometer equipped rotors analyzed. pulses pert anemometer fourier decomposition anemometer i.e. anemometer tunnel measurements. processed anemometer. reflected model. remotely checking anemometer anomalies sensor reliability

exact_dup

33176721

10.1051/matecconf/20120101006

Evolutionary algorithms are suitable to solve damage identification problems in a multiobjective context. However, the performance of these methods can deteriorate quickly with increasing noise intensities originating numerous uncertainties. In this paper, a statistic structural damage detection method formulated in a multiobjective context is proposed. The statistic analysis is implemented to take into account the uncertainties existing in the structural model and measured structural modal parameters. The presented method is verified by a number of simulated damage scenarios. The effects of noise and damage levels on damage detection are investigated

Multiobjective structural damage identification in uncertain environments

multiobjective structural damage identification in uncertain environments

evolutionary solve multiobjective context. deteriorate quickly intensities originating numerous uncertainties. statistic formulated multiobjective proposed. statistic implemented modal parameters. verified scenarios.

exact_dup

33556808

10.1103/PhysRevE.77.050402

We probe the local and global structure of spin-coated colloidal crystals via laser diffraction measurements\ud and scanning electron and atomic force microscopies, and find that they are unique three-dimensional orientationally correlated polycrystals, exhibiting short-range positional order but long-range radial orientational correlations, reminiscent of—but distinct from—two-dimensional colloidal hexatic phases. Thickness and symmetries are controllable by solvent choice and spin speed. While the polycrystallinity of these colloidal films limits their applicability to photonics, we demonstrate their feasibility as templates to make crack-free magnetic\ud patterns

Orientationally correlated colloidal polycrystals without long-range positional order

orientationally correlated colloidal polycrystals without long-range positional order

coated colloidal crystals diffraction scanning microscopies orientationally polycrystals exhibiting positional orientational reminiscent of—but from—two colloidal hexatic phases. symmetries controllable solvent speed. polycrystallinity colloidal films applicability photonics feasibility templates crack

exact_dup

33638326

10.1097/SLA.0000000000001405

OBJECTIVES: We sought to analyze the collected worldwide experience with use of snorkel/chimney endovascular aneurysm repair (EVAR) for complex abdominal aneurysm treatment.\ud BACKGROUND: EVAR has largely replaced open surgery worldwide for anatomically suitable aortic aneurysms. Lack of availability of fenestrated and branched devices has encouraged an alternative strategy utilizing parallel or snorkel/chimney grafts (ch-EVAR).\ud METHODS: Clinical and radiographic information was retrospectively reviewed and analyzed on 517 patients treated by ch-EVAR from 2008 from 2014 by prearranged defined and documented protocols.\ud RESULTS: A total of 119 patients in US centers and 398 in European centers were treated during the study period. US centers preferentially used Zenith stent-grafts (54.2%) and European centers Endurant stent-grafts (62.2%) for the main body component. Overall 898 chimney grafts (49.2% balloon expandable, 39.6% self-expanding covered stents, and 11.2% balloon expandable bare metal stents) were placed in 692 renal arteries, 156 superior mesenteric arteries (SMA), and 50 celiac arteries. At a mean follow-up of 17.1 months (range: 1-70 months), primary patency was 94%, with secondary patency of 95.3%. Overall survival of patients in this high-risk cohort for open repair at latest follow-up was 79%.\ud CONCLUSIONS: This global experience represents the largest series in the ch-EVAR literature and demonstrates comparable outcomes to those in published reports of branched/fenestrated devices, suggesting the appropriateness of broader applicability and the need for continued careful surveillance. These results support ch-EVAR as a valid off-the-shelf and immediately available alternative in the treatment of complex abdominal EVAR and provide impetus for the standardization of these techniques in the future

Collected world experience about the performance of the snorkel/chimney endovascular technique in the treatment of complex aortic pathologies: the PERICLES registry

collected world experience about the performance of the snorkel/chimney endovascular technique in the treatment of complex aortic pathologies: the pericles registry

objectives sought analyze worldwide snorkel chimney endovascular aneurysm repair evar abdominal aneurysm treatment. evar largely replaced worldwide anatomically aortic aneurysms. availability fenestrated branched devices encouraged utilizing snorkel chimney grafts evar radiographic retrospectively reviewed evar prearranged documented protocols. centers centers period. centers preferentially zenith stent grafts centers endurant stent grafts component. chimney grafts balloon expandable expanding covered stents balloon expandable bare stents placed arteries superior mesenteric arteries celiac arteries. patency patency cohort repair latest evar demonstrates comparable branched fenestrated devices appropriateness broader applicability continued careful surveillance. evar valid shelf immediately abdominal evar impetus standardization

exact_dup

33753147

10.1007/s13194-015-0125-x

This paper is a critical response to Andreas Bartels’ (2006) sophisticated defense of a structural account of scientific representation. We show that, contrary to Bartels’ claim, homomorphism fails to account for the phenomenon of misrepresentation. Bar- tels claims that homomorphism is adequate in two respects. First, it is conceptually adequate, in the sense that it shows how representation differs from misrepresentation and non-representation. Second, if properly weakened, homomorphism is formally ad- equate to accommodate misrepresentation. We question both claims. First, we show that homomorphism is not the right condition to distinguish representation from mis- representation and non-representation: a “representational mechanism” actually does all the work, and it is independent of homomorphism – as of any structural condition. Second, we test the claim of formal adequacy against three typical kinds of inaccurate representation in science which, by reference to a discussion of the notorious billiard ball model, we define as abstraction, pretence, and simulation. We first point out that Bar- tels equivocates between homomorphism and the stronger condition of epimorphism, and that the weakened form of homomorphism that Bartels puts forward is not a mor- phism at all. After providing a formal setting for abstraction, pretence and simulation, we show that for each morphism there is at least one form of inaccurate representa- tion which is not accommodated. We conclude that Bartels’ theory – while logically laying down the weakest structural requirements – is nonetheless formally inadequate in its own terms. This should shed serious doubts on the plausibility of any structural account of representation more generall

Varieties of Misrepresentation and Homomorphism

varieties of misrepresentation and homomorphism

andreas bartels’ sophisticated defense representation. contrary bartels’ claim homomorphism fails phenomenon misrepresentation. tels claims homomorphism adequate respects. conceptually adequate differs misrepresentation representation. properly weakened homomorphism formally equate accommodate misrepresentation. claims. homomorphism distinguish “representational mechanism” homomorphism condition. claim formal adequacy kinds inaccurate notorious billiard ball abstraction pretence simulation. tels equivocates homomorphism stronger epimorphism weakened homomorphism bartels puts phism all. formal abstraction pretence morphism inaccurate representa accommodated. bartels’ logically laying weakest nonetheless formally inadequate terms. shed serious doubts plausibility generall

exact_dup

35091005

10.1007/JHEP03(2015)068

We develop a lattice diagrammatic technique for calculating the chiral condensate of QCD at infinite coupling inspired by recent work of Tomboulis and earlier work from the 80’s. The technique involves calculating the contribution of gauge link diagrams formed from all possible combinations of a truncated number of sub-diagram types, by performing a resummation. We show how to calculate the relevant sub-diagrams, including a new technique for evaluating group integrals with arbitrary number of gauge link elements, using Young Projectors. Including up to four different diagram types we calculate the chiral condensate as a function of N f , and show that two real solutions result, which are non-zero for all integer N f . We analyse these solutions and find signs of convergence of the expansion at small N f . We should stress that a drawback of our technique is that, due to the addition of non-tree diagrams in the resummation, there are sources of error associated with miscounting and over-counting of diagrams. We discuss these sources of error in de- tail, and implement a technique to reduce over-counting of diagrams, while leaving other sources of error for future work

Calculating the chiral condensate of QCD at infinite coupling using a generalised lattice diagrammatic approach

calculating the chiral condensate of qcd at infinite coupling using a generalised lattice diagrammatic approach

diagrammatic calculating chiral condensate infinite inspired tomboulis involves calculating diagrams combinations truncated performing resummation. diagrams evaluating integrals projectors. chiral condensate integer analyse signs drawback diagrams resummation miscounting counting diagrams. tail implement counting diagrams leaving

exact_dup

35093025

10.1016/S0370-2693(98)00307-4

We present an example of the gauge mediated SUSY breaking flipped SU(5) model. The messengers of the SUSY breaking are either only colour triplets which belong to the minimal content of the scalar supermultiplets or together with triplets as a messengers emerge the ordinary Higgs doublets. In both cases the model predicts light gauginos in respect of the squarks and sleptons, which could be tested in the nearest LEP experiments. In both cases ''all order`` solution of the doublet-triplet splitting problem is obtained, the $\mu $-term of the order of 100 GeV is generated and the left handed neutrino masses are suppressed

Realistic GUT with Gauge Mediated Supersymmetry Breaking

realistic gut with gauge mediated supersymmetry breaking

susy breaking flipped model. messengers susy breaking colour triplets belong supermultiplets triplets messengers emerge ordinary doublets. predicts gauginos squarks sleptons nearest experiments. doublet triplet splitting handed suppressed

exact_dup

39395968

10.1007/s13209-009-0003-x

A method for dealing with monotonicity constraints in optimal control problems is used to generalize some results in the context of monopoly theory, also extending the generalization to a large family of principal-agent programs. Our main conclusion is that many results on diverse economic topics, achieved under assumptions of continuity and piecewise differentiability in connection with the endogenous variables of the problem, still remain valid after replacing such assumptions by two minimal requirements

Agency problems with non-smooth decision profiles: The case of monopoly under product quality

agency problems with non-smooth decision profiles: the case of monopoly under product quality

dealing monotonicity generalize monopoly extending generalization principal agent programs. diverse topics assumptions continuity piecewise differentiability connection endogenous valid replacing assumptions

exact_dup

41129167

10.1007/s00158-012-0783-7

The paper presents a formulation for multidisciplinary design optimization of vessels, subject to uncertain operating conditions. The formulation couples the multidisciplinary design analysis with the Bayesian approach to decision problems affected by uncertainty. In the present context, the design specifications are no longer given in terms of a single operating design point, but in terms of probability density function of the operating scenario. The optimal configuration is that which maximizes the performance expectation over the uncertain parameters variation. In this sense, the optimal solution is “robust” within the stochastic scenario assumed. Theoretical and numerical issues are addressed and numerical results in the hydroelastic optimization of a keel fin of a sailing yacht are presented

Hydroelastic optimization of a keel fin of a sailing boat: a multidisciplinary robust formulation for ship design

hydroelastic optimization of a keel fin of a sailing boat: a multidisciplinary robust formulation for ship design

presents formulation multidisciplinary vessels uncertain operating conditions. formulation couples multidisciplinary bayesian uncertainty. specifications operating operating scenario. maximizes expectation uncertain variation. “robust” stochastic assumed. addressed hydroelastic keel sailing yacht

exact_dup

42967962

10.1016/j.rser.2014.11.077

In some countries, photovoltaic (PV) technology is at a stage of development at which it can compete with conventional electricity sources in terms of electricity generation costs, i.e., grid parity. A case in point is Germany, where the PV market has reached a mature stage, the policy support has scaled down and the diffusion rate of PV systems has declined. This development raises a fundamental question: what are the motives to adopt PV systems at grid parity? The point of departure for the relevant literature has been on the impact of policy support, adopters and, recently, local solar companies. However, less attention has been paid to the motivators for adoption at grid parity. This paper presents an in-depth analysis of the diffusion of PV systems, explaining the impact of policy measures, adopters and system suppliers. Anchored in an extensive and exploratory case study in Germany, we provide a context-specific explanation to the motivations to adopt PV systems at grid parity

Motivators for adoption of photovoltaic systems at grid parity: A case study from Southern Germany

motivators for adoption of photovoltaic systems at grid parity: a case study from southern germany

photovoltaic compete electricity electricity i.e. parity. reached mature scaled declined. raises motives adopt parity departure adopters companies. paid motivators adoption parity. presents explaining adopters suppliers. anchored extensive exploratory explanation motivations adopt parity

exact_dup

44737382

10.1007/s11027-015-9642-3

In the present paper, national and externally organized projections of greenhouse gas emissions for Austria were compared to gain insight on the underlying scenario data assumptions. National greenhouse gas emission trends extend until 2030, an assessment of European Union (EU) countries to 2050. In addition, data for 2000-2100 was extracted from the global emission database described by the Representative Concentration Pathways (RCP). By identifying trends in these projections, it was possible to produce (a) a long-term assessment of national scenarios until 2100, (b) an assessment of the ambition level toward national climate strategies, and (c) a standardized method to compare trends across countries. By extracting RCP data, Austrian's methane, nitrous oxide,and carbon dioxide emissions up to 2100 could be projected for all sources as well as specific sectors. With respect to the RCP scenario emission data, national projectons did not seem to employ the mitigation potentials available for the most stringent RCP scenario, RCP2.6. Comparing projections that supported the EU Climate Strategy 2030 with national projections revealed similar trends. Because RCP2.6 is the only scenario consistent with a 2 degrees C global warming target, and it is much more ambitious than any of the national or European projections, further measures will be required if Austria is to adequately contribute to this widely accepted policy goal

Greenhouse gas scenarios for Austria: a comparison of different approaches to emission trends

greenhouse gas scenarios for austria: a comparison of different approaches to emission trends

externally organized projections greenhouse austria insight assumptions. greenhouse extend union pathways identifying projections scenarios ambition toward standardized countries. extracting austrian methane nitrous oxide dioxide projected sectors. projectons seem employ mitigation potentials stringent projections projections trends. warming ambitious projections austria adequately widely goal

exact_dup

46753353

10.1063/1.4863666

International audienceWe present a free-space optomechanical system operating in the 1-K range. The device is made ofa high mechanical quality factor micropillar with a high-reflectivity optical coating atop, combinedwith an ultra-small radius-of-curvature coupling mirror to form a high-finesse Fabry-Perot cavityembedded in a dilution refrigerator. The cavity environment as well as the cryostat have beendesigned to ensure low vibrations and to preserve micron-level alignment from room temperatur

Free-space cavity optomechanics in a cryogenic environment

free-space cavity optomechanics in a cryogenic environment

audiencewe optomechanical operating range. micropillar reflectivity coating atop combinedwith ultra curvature mirror finesse fabry perot cavityembedded dilution refrigerator. cavity cryostat beendesigned ensure vibrations preserve micron alignment room temperatur

exact_dup

46780910

10.1088/1367-2630/7/1/044

The triple-trap mass spectrometer ISOLTRAP at ISOLDE/CERN has demonstrated the feasibility of mass spectrometry of in-trap-decay product ions. This novel technique gives access to radionuclides, which are not produced directly at ISOL-type radioactive ion beam facilities. As a proof of principle, the in-trap decay of $^{37}K^+$ has been investigated in a Penning trap filled with helium buffer gas. The half-life of the mother nuclide was confirmed and the recoiling $^{37}Ar^+$ daughter ion was contained within the trap. The ions of either the mother or the daughter nuclide were transferred to a precision Penning trap, where their mass was determined

Mass spectrometry of atomic ions produced by in-trap decay of short-lived nuclides

mass spectrometry of atomic ions produced by in-trap decay of short-lived nuclides

triple trap spectrometer isoltrap isolde cern feasibility spectrometry trap ions. radionuclides isol radioactive facilities. trap penning trap filled helium gas. mother nuclide confirmed recoiling daughter trap. mother daughter nuclide transferred precision penning trap

exact_dup

47103166

10.1007/978-3-642-31585-5_18

International audienceWe introduce a natural extension of collapsible pushdown systems called annotated pushdown systems that replaces collapse links with stack annotations. We believe this new model has many advantages. We present a saturation method for global backwards reachability analysis of these models that can also be used to analyse collapsible pushdown systems. Beginning with an automaton representing a set of configurations, we build an automaton accepting all configurations that can reach this set. We also improve upon previous saturation techniques for higher-order pushdown systems by significantly reducing the size of the automaton constructed and simplifying the algorithm and proofs

A Saturation Method for Collapsible Pushdown Systems

a saturation method for collapsible pushdown systems

audiencewe collapsible pushdown annotated pushdown replaces collapse links stack annotations. believe advantages. saturation backwards reachability analyse collapsible pushdown systems. beginning automaton representing configurations build automaton accepting configurations set. saturation pushdown reducing automaton simplifying proofs

exact_dup

47282136

10.1016/j.soildyn.2013.03.007

Following the Mw 7.3 Martinique earthquake, November 29th, 2007, a post-seismic survey was conducted by the Bureau Central Sismologique Français (BCSF) for macroseismic intensities assessment. In addition to the inventories, ambient vibration recordings were performed close to the particularly damaged zones in the free-field and the buildings. The objective of the paper is to show the relevancy of performing ambient vibration recordings for post-earthquake surveys. The analyses of the recordings aim at explaining the variability of the damages through site effects, structure vulnerability or resonance phenomena and to help the characterization of the post-seismic building integrity. In three sites prone to site effects, we suspect damage to be related to a concordance between soil fundamental frequency and building resonance frequency. Besides, the recordings of ambient vibrations at La Trinité hospital before and after the earthquake allow us to quantify the damage due to earthquake in terms of stiffness loss

Contribution of ambient vibration recordings (Free-field and buildings) for post-seismic analysis: the case of the Mw 7.3 MARTINIQUE (French lesser ANTILLES) earthquake, november 29, 2007

contribution of ambient vibration recordings (free-field and buildings) for post-seismic analysis: the case of the mw 7.3 martinique (french lesser antilles) earthquake, november 29, 2007

martinique earthquake november seismic bureau sismologique français bcsf macroseismic intensities assessment. inventories ambient vibration recordings damaged zones buildings. relevancy performing ambient vibration recordings earthquake surveys. recordings explaining damages vulnerability phenomena seismic integrity. prone suspect concordance frequency. besides recordings ambient vibrations trinité earthquake quantify earthquake stiffness

exact_dup

47316311

10.1016/j.geomorph.2016.05.036

International audienceThis paper investigates post-dam geomorphic and vegetation changes in the Sauce Grande River, a meandering dryland river impounded by a large water-conservation dam. As the dam impounds a river section with scarce influence of tributaries , sources for fresh water and sediment downstream are limited. Changes were inspected based on (i) analysis of historical photographs/imagery spanning pre-(1961) and post-dam (1981, 2004) channel conditions for two river segments located above and below the dam, and (ii) field survey of present channel conditions for a set of eight reference reaches along the river segments. Whilst the unregulated river exhibited active lateral migration with consequent adjustments of the channel shape and size, the river section below the dam was characterized by (i) marked planform stability (93 to 97%), and by (ii) vegetation encroachment leading to alternating yet localized contraction of the channel width (up to 30%). The present river displays a moribund, stable channel where (i) redistribution of sediment along the river course no longer occurs and (ii) channel forms constitute a remnant of a fluvial environment created before closing the dam, under conditions of higher energy. In addition to providing new information on the complex geomorphic response of dry-land rivers to impoundment, this paper represents the very first geomorphic assessment of the regulated Sauce Grande and therefore provides an important platform to underpin further research assessing the geomorphic state of this highly regulated dryland river

Geomorphic and vegetation changes in a meandering dryland river regulated by alarge dam, Sauce Grande River, Argentina

geomorphic and vegetation changes in a meandering dryland river regulated by alarge dam, sauce grande river, argentina

audiencethis investigates geomorphic vegetation sauce grande river meandering dryland river impounded conservation dam. impounds river scarce tributaries fresh sediment downstream limited. inspected historical photographs imagery spanning river segments eight reaches river segments. whilst unregulated river exhibited lateral migration consequent adjustments river marked planform vegetation encroachment alternating localized contraction river displays moribund redistribution sediment river constitute remnant fluvial created closing energy. geomorphic rivers impoundment geomorphic regulated sauce grande platform underpin assessing geomorphic regulated dryland river

exact_dup

47328242

10.1007/978-3-319-41498-0_7

International audienceThe main goal of the current study is to develop a new cockpit controlled language for future Airbus aircraft by using psycholinguistic testing to optimize pilot comprehension. Pilots are aided by cockpit messages in order to deal with different situations during aircraft operations. The current controlled languages used on the Airbus aircraft have been carefully constructed to avoid ambiguity, inaccuracy, inconsistency, and inadequacy (Spaggiari, Beaujard, Cannesson (2003)) in order to ensure the safety of the navigation, operational needs, and the adaptability of the human-computer interaction to different situations in the cockpit. However, this controlled language has several limitations, mostly due to small screen sizes (limited number of words and sentences) and is highly codified (non-conforming to natural language syntax, color-coded and so on) so that it requires prior pilot training in order to achieve fluency. As future cockpit design is under construction, we might be looking at a different flexibility margin. Our experimentation plan is to go against the tide of common CNL (Controlled Natural Language) construction, in the sense that we will not be taking natural language and simplifying it, but rather taking a highly controlled codified language (therefore theoretically most simple) and " complexifying " it (bring it closer to natural language: theoretically most complex) in order to make it more accessible, and limit prior training needs

To What Extent Does Text Simplification Entail a More Optimized Comprehension in Human-Oriented CNLs?

to what extent does text simplification entail a more optimized comprehension in human-oriented cnls?

audiencethe goal cockpit airbus aircraft psycholinguistic optimize pilot comprehension. pilots aided cockpit messages deal situations aircraft operations. languages airbus aircraft carefully avoid ambiguity inaccuracy inconsistency inadequacy spaggiari beaujard cannesson ensure navigation operational adaptability situations cockpit. limitations mostly screen sizes sentences codified conforming syntax coded pilot fluency. cockpit looking flexibility margin. experimentation plan tide simplifying codified theoretically complexifying bring closer theoretically accessible

exact_dup

47343227

10.1016/j.jtrangeo.2015.01.013

International audienceModels and empirical studies of port system evolution dominantly focus on land-based dynamics. Hence, it is traditionally recognized that such dynamics condition the evolution of ports and their relations as well as wider regional integration processes. The Maghreb region (Algeria, Morocco, and Tunisia), which is currently responsible for no less than one-third of all African port throughputs, offers a fertile ground to test the possibility for regional integration to occur through maritime linkages despite limited trade integration and land-based transport connectivity. Main results highlight the increase of trans-Maghreb maritime connectivity but this occurs mostly at the periphery of the system based on transit flows. Logistical integration versus trade integration is discussed in light of the recent evolution of Maghreb ports and of the region in general

Regional integration and maritime connectivity across the Maghreb seaport system

regional integration and maritime connectivity across the maghreb seaport system

audiencemodels port dominantly dynamics. traditionally recognized ports wider processes. maghreb algeria morocco tunisia african port throughputs offers fertile maritime linkages trade connectivity. highlight maghreb maritime connectivity mostly periphery transit flows. logistical trade maghreb ports

exact_dup

47797432

10.1007/s10758-006-0005-8

En open access sur http://www.springerlink.com/content/k2k616x254q34236/?p=fa97ce28e2884c20834f83d7d8f92a2e&pi=1International audienceE-Exercise Bases (EEB) are now used in the teaching of mathematics, especially at university. We discuss here the consequences of their use on the students' activity during computer lab sessions. Results stem from observations of several teaching designs organised in different French universities with three e-exercise bases. The analysis focuses on new tasks and on specific solving strategies, which appear using these resources. Moreover, specific didactic contract clauses are studied

Using E-Exercise Bases in Mathematics: Case Studies at University

using e-exercise bases in mathematics: case studies at university

audiencee exercise bases teaching mathematics university. consequences sessions. teaching designs organised french universities exercise bases. focuses tasks solving resources. didactic contract clauses

exact_dup

48161066

10.1016/j.quaint.2015.06.008

International audienceA sediment core has been retrieved from Vanevan peat (south-eastern shore of Lake Sevan, Armenia), which is today disconnected from Lake Sevan thanks to an artificial shallowing of the lake. Based on 5 radiocarbon dates, Vanevan record covers the Mid Holocene (from ca. 7800 to ca. 5100 cal. BP). The Late Holocene is today absent in the peat stratigraphy due to modern peat exploitation by surface mining. This study focuses on a multi-proxy approach including pollen, charcoals, and pollen-inferred climate reconstruction. An open-land, steppic vegetation is recorded up to ca. 7700 cal. BP, followed by a more forested landscape during the Mid Holocene (up to ca. 5700 cal. BP), and ending again with an open-land vegetation (to the end of record, 5100 cal. BP). This vegetation dynamics responds to general climate changes documented in the Near East. Whether human activities are documented since ca. 7500 cal. BP (Late Neolithic) in Vanevan, they remain marginal and probably did not affect the area. Early Holocene dry climate, which caused the steppic environment to be widespread through the Near East, is strongly related to low late spring precipitation (PMay–Jun = 180 mm). Mid Holocene forested landscape and increasing lake-level seem related to late spring precipitation (+28%), which is the main change in estimated climate parameters. This has to be linked with reinforcement of the Westerlies and less active Siberian High, which are inversely involved in the following, dry phase starting at ca. 5700 cal. B

Mid Holocene vegetation reconstruction from Vanevan peat (south-eastern shore of Lake Sevan, Armenia)

mid holocene vegetation reconstruction from vanevan peat (south-eastern shore of lake sevan, armenia)

audiencea sediment retrieved vanevan peat eastern shore lake sevan armenia today disconnected lake sevan thanks artificial shallowing lake. radiocarbon dates vanevan record covers holocene cal. holocene today absent peat stratigraphy modern peat exploitation mining. focuses proxy pollen charcoals pollen inferred reconstruction. steppic vegetation cal. forested landscape holocene cal. ending vegetation record cal. vegetation responds documented east. documented cal. neolithic vanevan marginal probably area. holocene steppic widespread east spring precipitation pmay–jun holocene forested landscape lake seem spring precipitation parameters. reinforcement westerlies siberian inversely cal.

exact_dup

48181713

10.1007/s11265-014-0952-6

International audienceThe majority of applications, ranging from the low complexity to very multifaceted entities requiring dedicated hardware accelerators, are very well suited for Multiprocessor Systems-on-Chips (MPSoCs). It is critical to understand the general characteristics of a given embedded application: its behavior and its requirements in terms of MPSoC resources.This paper presents a complete method to study the important aspect of memory characteristic of an application. This method spans the theoretical, architecture-independent memory characterization to the quasi optimal static memory allocation of an application on a real shared-memory MPSoC. The application is modeled as an Synchronous Dataflow (SDF) graph which is used to derive a Memory Exclusion Graph (MEG) essential for the analysis and allocation techniques. Practical considerations, such as cache coherence and memory broad-casting, are extensively treated. Memory footprint optimization is demonstrated using the example of a stereo matching algorithm from the computer vision domain. Experimental results show a reduction of the memory footprint by up to 43% compared to a state-of-the-art minimization technique, a throughput improvement of 33% over dynamic allocation, and the introduction of a tradeoff between multi-core scheduling flexibility and memory footprint

Memory Analysis and Optimized Allocation of Dataflow Applications on Shared-Memory MPSoCs : In-Depth Study of a Computer Vision Application

memory analysis and optimized allocation of dataflow applications on shared-memory mpsocs : in-depth study of a computer vision application

audiencethe majority ranging multifaceted entities requiring dedicated hardware accelerators suited multiprocessor chips mpsocs embedded mpsoc resources.this presents aspect application. spans architecture quasi allocation shared mpsoc. modeled synchronous dataflow derive exclusion allocation techniques. practical considerations cache coherence broad casting extensively treated. footprint stereo matching vision domain. footprint minimization throughput allocation tradeoff scheduling flexibility footprint

exact_dup

48350165

10.1016/j.enpol.2009.05.025

International audienceThis paper proposes to test the global hybrid computable general equilibrium model IMACLIM-R against macroeconomic data. To do so, it compares the modeled and observed responses of the Indian economy to the rise of oil price during the 2003- 2006 period. The objective is twofold: first, to disentangle the various mechanisms and policies at play in India's economy response to rising oil prices and, second, to validate our model as a tool capable of reproducing short-run statistical data. With default parameterization, the model predicts a significant decrease in the Indian growth rate that is not observed. However, this discrepancy is corrected if three additional mechanisms identified by the International Monetary Fund are introduced, namely the rise in exports of refined oil products, the imbalance of the trade balance allowed by large capital inflows, and the incomplete pass-through of the oil price increase to Indian customers. This work is a first step toward model validation, and provides interesting insights on the modeling methodology relevant to represent an economy's response to a shock, as well as on how short-term mechanisms – and policy action – can smooth the negative impacts of energy price shocks or climate policies. Running headlin

The Resilience of the Indian Economy to Rising Oil Prices as a Validation Test for a Global Energy-Environment-Economy CGE Model

the resilience of the indian economy to rising oil prices as a validation test for a global energy-environment-economy cge model

audiencethis proposes hybrid computable imaclim macroeconomic data. compares modeled indian economy period. twofold disentangle policies india economy rising prices validate capable reproducing data. default parameterization predicts indian observed. discrepancy corrected monetary fund exports refined imbalance trade balance capital inflows incomplete pass indian customers. toward validation insights methodology economy shock impacts shocks policies. running headlin

exact_dup

49301388

10.1016/j.radmeas.2013.11.007

Radiation sources of 60^Co are commonly measured by means of HPGe gamma spectrometers, either as unknown sources or as calibration sources. However, the two gamma rays that are emitted by this nuclide, at 1.17 MeV and 1.33 MeV respectively, follow each other so rapidly that in the cases where both photons interact with the crystal, the electronics will record a single additive pulse. This is a cascade or coincidence summing effect. Such effect induces in the gamma spectra a "sum-peak", appearing at 2.5 MeV on the energy axis, generated by the pair of photons which have both been entirely absorbed by the detector. Also, the second photon is correlated for direction to the first one, i.e., it will not be emitted at random, with an isotropic probability. Then the question arises of to what extent the two effects, cascade and correlation, might affect the count rates for the three peaks. Various answers have already been published, but without practical solutions. In this context, the present work was devoted to further explore the question by means of Monte Carlo simulation, in the case of a welltype detector. As a result, inside the well the sum peak only is not affected and it allows accurate evaluation of the detector efficiency at 1.25 MeV. Outside the well, near the detector, none of the three peaks can be directly used for efficiency evaluation, unless the relevant corrections can be evaluated. At a distance from the detector, the two single peaks can be used, but with the drawback of a low efficiency

Calibration of a germanium well-detector using $^{60}$Co: the effects of the angular correlation of the two gamma rays emitted in cascade, quantified with Monte Carlo simulations

calibration of a germanium well-detector using $^{60}$co: the effects of the angular correlation of the two gamma rays emitted in cascade, quantified with monte carlo simulations

commonly hpge gamma spectrometers unknown calibration sources. gamma rays emitted nuclide rapidly photons interact electronics record additive pulse. cascade coincidence summing effect. induces gamma appearing photons entirely absorbed detector. i.e. emitted isotropic probability. arises cascade count peaks. answers practical solutions. devoted explore monte carlo welltype detector. mev. none unless evaluated. drawback

exact_dup

51213884

10.1007/978-3-642-04268-3_25

International audienceOver the last decade, remarkable progress has been made in the field of endovascular treatment of aneurysms. Technological advances continue to enable a growing number of patients with cerebral aneurysms to be treated with a variety of endovascular strategies, essentially using detachable platinum coils. Yet, coil embolization remains a very complex medical procedure for which careful planning must be combined with advanced technical skills in order to be successful. In this paper we propose a method for computing the complex blood flow patterns that take place within the aneurysm, and for simulating the interaction of coils with this flow. This interaction is twofold, first involving the impact of the flow on the coil during the initial stages of its deployment, and second concerning the decrease of blood velocity within the aneurysm, as a consequence of coil packing. We also propose an ap- proach to achieve real-time computation of coil-flow bilateral influence, necessary for interactive simulation. This in turns allows to dynamically plan coil embolization for two key steps of the procedure: choice and placement of the first coils, and assessment of the number of coils neces- sary to reduce aneurysmal blood velocity and wall pressure

Toward Real-time Simulation of Blood-Coil Interaction during Aneurysm Embolization

toward real-time simulation of blood-coil interaction during aneurysm embolization

audienceover decade remarkable progress endovascular aneurysms. technological advances continue enable growing cerebral aneurysms endovascular essentially detachable platinum coils. coil embolization careful planning advanced skills successful. propose aneurysm simulating coils flow. twofold involving coil deployment concerning aneurysm coil packing. propose proach coil bilateral interactive simulation. turns dynamically plan coil embolization placement coils coils neces sary aneurysmal

exact_dup

51223374

10.1016/j.carbon.2015.08.103

In order to build upon the exceptional interest for flexible sensors based on carbon nanotube networks (CNNs), the field requires high device-to-device reproducibility. Inkjet printing has provided outstanding results for flexible ohmic sensors in terms of reproducibility of their resistance. However, the reproducibility of the sensitivity, the most critical parameter for sensing application, has been only marginally assessed. In the present paper, CNN based resistive strain sensors fabricated by inkjet-printing on flexible Ethylene Tetrafluoroethylene (EFTE) sheets are presented. The variability on the device initial resistance is studied for 5 different batches of sensors from 3 to 72 devices each. The variability ranges between 8.4% and 43% depending on the size of the batches, with a 20% average. An 8-device batch with 15% variability on initial resistance is further studied for variability on the strain and thermal sensitivity. Standard deviation values are found to be as low as 16% on the strain sensitivity and 8% on the temperature sensitivity. Moreover, the devices are hysteresis free, a rare achievement for CNT strain sensors on plastics

Highly reproducible, hysteresis-free, flexible strain sensors by inkjet printing of carbon nanotubes

highly reproducible, hysteresis-free, flexible strain sensors by inkjet printing of carbon nanotubes

build exceptional flexible sensors nanotube cnns reproducibility. inkjet printing outstanding flexible ohmic sensors reproducibility resistance. reproducibility sensing marginally assessed. resistive sensors fabricated inkjet printing flexible ethylene tetrafluoroethylene efte sheets presented. batches sensors devices each. ranges batches average. batch sensitivity. sensitivity. devices hysteresis rare achievement sensors plastics

exact_dup

51228725

10.1016/j.petrol.2012.03.027

International audienceMagnetic Resonance Imaging (MRI) method allows to observe the distribution of different fluids in situ in porous media, and to measure oil and water saturation. Although this technique has great advantages compared to others, there remains large space for assessing the method and improving the accuracy of measurement. Using MRI, the oil secondary migration paths are scanned to measure the saturation distribution during the laboratory experiments. The resulting map can be calibrated using a device with the same pore structure as the probed sample and fully saturated with oil. This device is scanned with the probed sample at the same time in order to calibrate the saturation. The Spin-echo multi-slices sequence (SEMS) is adopted for MRI to ensure that the oil saturation in migration paths is accurately measured. The relevant spatial resolution of the mapping is defined according to the concept of REV (representative elementary volume). The oil saturation resulting from data obtained using different image formats are compared and the resulting saturation evaluation is compared to direct bulk saturation measurements. This comparison demonstrates that the calculated MRI oil saturation using DICOM image format is quite accurate, with a relative error less than 2%

Testing oil saturation distribution in migration paths using MRI

testing oil saturation distribution in migration paths using mri

audiencemagnetic fluids situ porous saturation. great advantages assessing improving measurement. migration paths scanned saturation experiments. calibrated pore probed saturated oil. scanned probed calibrate saturation. echo slices sems adopted ensure saturation migration paths accurately measured. elementary saturation formats saturation saturation measurements. demonstrates saturation dicom format

exact_dup

51442406

10.1016/j.diamond.2009.04.008

International audienceSeveral 65 μm thick epitaxial diamond films prepared on (100) Ib substrates by high power pulsed microwave plasma assisted chemical vapour deposition (HP-MPCVD) are studied as a function of surface treatments by cathodoluminescence (CL) and photoluminescence (PL) spectroscopies. They are either asgrown, or polished, or etched by a microwave oxygen plasma, or after applying subsequently the two last processes. In CL spectra, bands due to defects occur at 2.3 eV, 3.07 eV, 3.7 eV and 4.7 eV, the last one being specific of polished surfaces, with nearly no contrast in the luminescence image. A fundamental result consists in demonstrating that the defects induced by polishing can be removed by oxygen plasma etching. Additionally, in order to assess how luminescence spectra originate from a peculiar depth or not, a bevelled sample is studied. PL spectra are acquired on the sample side while CL spectra are measured at several points on the bevel top side till to the Ib substrate. Comparison of the two sets of result show that the H3 signal originates from the Ib substrate even if it is present in the CL spectra of the film. An analysis of the change in the intensity of the TO free exciton line, defect bands and H3 signal, along decreasing photon energies, as a function of the thickness of the remaining HP-PMPCVD film, is performed with the help of a model taking the diffusion of the unrecombined excitonic pairs and the re-excited photoluminescence into account. CL images recorded at specific wavelengths, which do not show inverted contrast, are also assessed. From these data, the exciton diffusion length is evaluated to 11 μm in the major part of the epitaxial layer except for the first 20 μm close to the Ib substrate where it decreases down to 2 μm. This study sheds light on the interpretation of luminescence spectra excited by an electron beam in undoped diamond layers. Defects bands due to damages induced by polishing and etching processes are also documented

Defect analysis and excitons diffusion in undoped homoepitaxial diamond films after polishing and oxygen plasma etching

defect analysis and excitons diffusion in undoped homoepitaxial diamond films after polishing and oxygen plasma etching

audienceseveral thick epitaxial diamond films substrates pulsed microwave assisted vapour deposition mpcvd treatments cathodoluminescence photoluminescence spectroscopies. asgrown polished etched microwave subsequently processes. defects polished nearly luminescence image. demonstrating defects polishing removed etching. additionally luminescence originate peculiar bevelled studied. acquired bevel till substrate. originates film. exciton defect decreasing pmpcvd film unrecombined excitonic excited photoluminescence account. wavelengths inverted assessed. exciton epitaxial sheds luminescence excited undoped diamond layers. defects damages polishing etching documented

exact_dup

51444204

10.1080/09645292.2011.561630

International audienceModelling students' behaviour in relation to tuition fees is a complex task since students' "talent" is not common knowledge. Students observe a private noisy signal of their abilities, while university receives noisy information based on the quantitative and qualitative data provided by university applicants. In this article, we add the heterogeneity of the population to this model: we assume that this heterogeneity means that the perception of skills among a part of the population is biased and underestimates the capabilities of its members to succeed in the higher education system. Our conclusions differ from those derived in the literature and show in particular that the optimal tuition fees for a given number of students are lower than those obtained for a homogeneous population

Tuition fees, self-esteem and social heterogeneity

tuition fees, self-esteem and social heterogeneity

audiencemodelling tuition fees talent knowledge. private noisy abilities receives noisy qualitative applicants. heterogeneity heterogeneity perception skills biased underestimates capabilities succeed system. tuition fees homogeneous

exact_dup

51931604

10.1007/978-3-642-29063-3_18

International audienceUrban fabric characterization is very useful in urban design, planning, modeling and simulation. It is traditionally considered as a descriptive task mainly based on visual inspection of urban plans. Cartographic databases and geographic information systems (GIS) capabilities make possible the analytical formalization of this issue. This paper proposes a renewed approach to characterize urban fabrics using buildings' footprints data. This characterization method handles both architectural form and urban open space morphology since urban space can be intuitively and simply divided into built-up areas (buildings) and non-built-up areas (open spaces). First, we propose to build a mesh of the open space (a morphologic tessellation) and then we formalize relevant urban morphology properties and translate them into a set of indicators (using some common-used indispensable indicators and proposing a new formulation or generalization of a few others). This first step produces a highly dimensional data set for each footprint characterizing both the building and its surrounding open space. This data set is then reduced and classified using a spatial clustering process, the self-organizing maps in this case. Our method only requires buildings' footprints as input data. It can be applied on huge datasets and is independent from urban contexts. The results show that the classification produced is more faithful to ground truth (highlighting the variety of urban morpho-logic structures) than traditional descriptive characterizations generally lacking open space properties

Towards Urban Fabrics Characterization Based on Buildings Footprints

towards urban fabrics characterization based on buildings footprints

audienceurban fabric planning simulation. traditionally descriptive inspection plans. cartographic databases geographic capabilities formalization issue. proposes renewed characterize fabrics buildings footprints data. handles architectural morphology intuitively divided built buildings built propose build mesh morphologic tessellation formalize morphology translate indicators indispensable indicators proposing formulation generalization produces footprint characterizing surrounding space. classified clustering organizing case. buildings footprints data. huge datasets contexts. faithful truth highlighting morpho logic traditional descriptive characterizations lacking

exact_dup

51954787

10.1103/PhysRevB.79.064416

International audienceWe investigated the magnetic and crystal structures of the recent reported magnetoelectric system LiCrSi2O6 by powder neutron diffraction. Below TN=11.5 K, an antiferromagnetic order appears. It is characterized by an antiferromagnetic coupling within the CrO6 octahedra chains and a ferromagnetic coupling between the chains. The magnetic order is commensurate with the lattice with k=0. The associated magnetic space group is P21 /c. This symmetry is in agreement with the reported magnetoelectric effect. We show that the magnetic frustration in this system is small. Finally, we discuss our results using a Landau phenomenological model and in the light of the literature

Magnetic and crystal structures of the magnetoelectric pyroxene LiCrSi2O6

magnetic and crystal structures of the magnetoelectric pyroxene licrsi2o6

audiencewe magnetoelectric licrsi powder neutron diffraction. antiferromagnetic appears. antiferromagnetic octahedra chains ferromagnetic chains. commensurate magnetoelectric effect. frustration small. landau phenomenological

exact_dup

52047321

10.1093/icesjms/fsp003

This is a pre-copy-editing, author-produced PDF of an article accepted for publication in ICES Journal of Marine Science following peer review. The definitive publisher-authenticated version ICES J. Mar. Sci. (2009) 66 (6): 1252-1258 is available online at: http://icesjms.oxfordjournals.org/content/66/6/1252Data from a standard split-beam echosounder are used to estimate tail-beat frequency within a dense herring (Clupea harengus L.) layer. The data were collected by lowering a horizontally projecting 38 kHz split-beam transducer into a herring layer at 245-m depth. Individual targets were concatenated into tracks, and a fast Fourier transform was used to estimate the periodogram of the backscattering strengths along each track. A simple model, assumed accurate under certain conditions, was used to relate the periodogram to tail-beat frequency. The requisite conditions are discussed. Examples of accurate tail-beat estimates from single high-quality tracks, which are consistent with statistics on all tracks in the test dataset, are presented. In addition, the cross periodogram between closely spaced individuals was calculated on selected tracks to estimate the relative phase between the adjacent tracks within the school. Finally, the potential use of this method to resolve schooling behaviour, improve target-strength estimates, and even estimate fish condition, is discussed

Estimating tail-beat frequency using split-beam echosounders

estimating tail-beat frequency using split-beam echosounders

copy editing publication ices marine peer review. definitive publisher authenticated ices mar. sci. split echosounder tail beat dense herring clupea harengus layer. lowering horizontally projecting split transducer herring depth. targets concatenated tracks fourier transform periodogram backscattering strengths track. relate periodogram tail beat frequency. requisite discussed. tail beat tracks tracks dataset presented. periodogram closely spaced tracks adjacent tracks school. resolve schooling fish

exact_dup

52051500

10.1093/icesjms/fsp003

This is a pre-copy-editing, author-produced PDF of an article accepted for publication in ICES Journal of Marine Science following peer review. The definitive publisher-authenticated version ICES J. Mar. Sci. (2009) 66 (6): 1252-1258 is available online at: http://icesjms.oxfordjournals.org/content/66/6/1252Data from a standard split-beam echosounder are used to estimate tail-beat frequency within a dense herring (Clupea harengus L.) layer. The data were collected by lowering a horizontally projecting 38 kHz split-beam transducer into a herring layer at 245-m depth. Individual targets were concatenated into tracks, and a fast Fourier transform was used to estimate the periodogram of the backscattering strengths along each track. A simple model, assumed accurate under certain conditions, was used to relate the periodogram to tail-beat frequency. The requisite conditions are discussed. Examples of accurate tail-beat estimates from single high-quality tracks, which are consistent with statistics on all tracks in the test dataset, are presented. In addition, the cross periodogram between closely spaced individuals was calculated on selected tracks to estimate the relative phase between the adjacent tracks within the school. Finally, the potential use of this method to resolve schooling behaviour, improve target-strength estimates, and even estimate fish condition, is discussed

Estimating tail-beat frequency using split-beam echosounders

estimating tail-beat frequency using split-beam echosounders

copy editing publication ices marine peer review. definitive publisher authenticated ices mar. sci. split echosounder tail beat dense herring clupea harengus layer. lowering horizontally projecting split transducer herring depth. targets concatenated tracks fourier transform periodogram backscattering strengths track. relate periodogram tail beat frequency. requisite discussed. tail beat tracks tracks dataset presented. periodogram closely spaced tracks adjacent tracks school. resolve schooling fish

exact_dup

52127068

10.1021/acs.est.5b00320

Impending global environmental- and resource related problems require a transformation of the socio-economic metabolism, the inputs, processing and outputs of materials and energy in society. The environmental impacts and resource requirements of metal cycles can be reduced significantly if they approach a steady state where in-use stocks are maintained through recycling rather than primary metal. In a steady state system, linkages between metal cycles, for example through alloys, impurities and by-products, will become increasingly important due to the high share of recycled post-consumer metal. The aluminium cycle is in this regard particularly important: It is responsible for large greenhouse gas emissions and energy use, highly sensitive to alloying elements and impurities, and has a strong linkage to gallium, which is a by-product of aluminium production. In this thesis, these linkages were studied in the context of in-use stock saturation and closed-loop material cycles, to better understand their importance, and to identify strategies that can facilitate a transition towards a steady-state socio-economic metabolism. It was found that higher recycling rates are increasingly difficult to achieve in closed-loop steady state systems, due to the accumulation of impurities. A model of aluminium beverage can recycling showed that stable metal impurity concentrations are reached after 5-15 recycling loops with recycling rates in the range of 45-75%. It is expected that similar results would apply for systems that are more complex. The increasing availability of automotive aluminium scrap represents a future challenge for recyclers due to the large variety of alloys and limited demand for mixed scrap. A global surplus of scrap may occur in the period 2020-2030 unless measures are taken to restructure the recycling system. Allowing recycled material in safety-relevant components, together with an improved sorting of alloys through dismantling or advanced sorting technologies, may delay the surplus with several decades. The global system of production, manufacturing, use and recycling of gallium, and gallium-containing products was described and quantified for 2011. Gallium use is currently driven by neodymium-iron-boron magnets containing gallium as an alloying element and semiconductor applications: integrated circuits, lightemitting diodes and photovoltaic panels. Large material losses occur in the fabrication of intermediate products and devices. Currently, demand is far below the supply potential. Scenario analysis showed that a low stock saturation in the aluminium cycle might cause the supply potential of gallium to fall below future demand, given an increased market penetration of gallium-containing technologies. A number of measures was identified for improving the systemwide material efficiency, among which the most effective are related to process yield improvements or collection of production scrap. The results showed that linkages between material cycles greatly complicate the transition to a steady-state socio-economic metabolism, and at the same time indicated priorities for measures that can be taken to facilitate this transition

Linkages and stock dynamics of the aluminium-gallium system: Alloying elements, impurities and by-products

linkages and stock dynamics of the aluminium-gallium system: alloying elements, impurities and by-products

impending resource socio metabolism inputs outputs society. impacts resource cycles steady stocks maintained recycling metal. steady linkages cycles alloys impurities increasingly share recycled consumer metal. aluminium regard greenhouse alloying impurities linkage gallium aluminium production. thesis linkages stock saturation cycles facilitate steady socio metabolism. recycling increasingly steady accumulation impurities. aluminium beverage recycling impurity reached recycling loops recycling complex. availability automotive aluminium scrap challenge recyclers alloys scrap. surplus scrap unless restructure recycling system. allowing recycled sorting alloys dismantling advanced sorting technologies delay surplus decades. manufacturing recycling gallium gallium quantified gallium neodymium iron boron magnets gallium alloying semiconductor circuits lightemitting diodes photovoltaic panels. losses fabrication devices. supply potential. stock saturation aluminium supply gallium fall penetration gallium technologies. improving systemwide improvements scrap. linkages cycles greatly complicate steady socio metabolism priorities facilitate

exact_dup

52196663

10.1093/brain/awr309

International audienceSemantic dementia is characterized by semantic deficits and behavioural abnormalities that occur in the wake of bilateral inferolateral and predominantly left-sided anterior temporal lobe atrophy. The temporal poles have been shown to be involved in theory of mind, namely the ability to ascribe cognitive and affective mental states to others that regulates social interactions by predicting and interpreting human behaviour. However, very few studies have examined theory of mind in semantic dementia. In this study, we investigated both cognitive and affective theory of mind in a group of patients with semantic dementia, using separate objective and subjective assessment tasks. Results provided objective evidence of an impact of semantic dementia on cognitive and affective theory of mind, consistent with the patients' atrophy in the left temporal lobe and hypometabolism in the temporal lobes and the medial frontal cortex. However, the subjective assessment of theory of mind suggested that awareness of the affective but not cognitive theory of mind deficit persists into the moderate stage of the disease

Theory of mind impairments in patients with semantic dementia. : ToM in semantic dementia

theory of mind impairments in patients with semantic dementia. : tom in semantic dementia

audiencesemantic dementia semantic deficits behavioural abnormalities wake bilateral inferolateral predominantly sided anterior lobe atrophy. poles mind ascribe affective regulates predicting interpreting behaviour. mind semantic dementia. affective mind semantic dementia subjective tasks. semantic dementia affective mind atrophy lobe hypometabolism lobes medial frontal cortex. subjective mind awareness affective mind deficit persists moderate

exact_dup

52197647

10.1007/s00277-008-0670-x

International audienceA retrospective study was conducted to assess changes in cerebrovascular lesions, as assessed by magnetic resonance (MR) imaging and angiography in 18 children with sickle cell disease (SCD) receiving optimised chronic transfusions for primary stroke prevention (abnormal transcranial Doppler flow, nine patients, median follow-up 14.3 months (range, 7.9–48.9)) or secondary stroke prevention (nine patients, median follow-up 59.6 months (range, 11.0–127.9)). An experienced neuroradiologist blinded to patient data reviewed the 41 MR scans (median/patient, three (2–4)). Standard scores were used to evaluate parenchymal and vascular abnormalities at baseline and last follow-up. Within-patient score changes evaluated using Wilcoxon's paired rank test indicated lesion progression in the secondary-prevention group ( = 0.027). Optimised transfusion therapy does not prevent progression of cerebral vasculopathy in SCD children with a history of stroke

Does regular blood transfusion prevent progression of cerebrovascular lesions in children with sickle cell disease?

does regular blood transfusion prevent progression of cerebrovascular lesions in children with sickle cell disease?

audiencea retrospective cerebrovascular lesions angiography sickle receiving optimised transfusions stroke prevention abnormal transcranial doppler nine stroke prevention nine experienced neuroradiologist blinded reviewed scans parenchymal vascular abnormalities wilcoxon paired lesion progression prevention optimised transfusion prevent progression cerebral vasculopathy stroke

exact_dup

52293522

10.1002/bem.21937

International audienceIdiopathic Environmental Intolerance attributed to Electromagnetic Fields (IEI-EMF) is a condition in which symptoms are attributed to electromagnetic field (EMF) exposure. As electro-hypersensitive (EHS) people have repeatedly been observed, during provocation trials, to report symptoms following perceived rather than actual exposure, the hypothesis has been put forward that IEI-EMF originates from psychological mechanisms, especially nocebo responses. This paper examines this hypothesis, using data from a qualitative study aimed at understanding how EHS people come to regard themselves as such. Forty self-diagnosed EHS people were interviewed. A typified model of their attribution process was then elaborated, inductively, from their narratives. This model is linear and composed of seven stages: (1) onset of symptoms; (2) failure to find a solution; (3) discovery of EHS; (4) gathering of information about EHS; (5) implicit appearance of conviction; (6) experimentation; (7) conscious acceptance of conviction. Overall, symptoms appear before subjects start questioning effects of EMF on their health, which is not consistent with the hypothesis that IEI-EMF originates from nocebo responses to perceived EMF exposure. However, such responses might occur at the sixth stage of the process, potentially reinforcing the attribution. It remains possible that some cases of IEI-EMF originate from other psychological mechanisms

Does electromagnetic hypersensitivity originate from nocebo responses? : Indications from a qualitative study

does electromagnetic hypersensitivity originate from nocebo responses? : indications from a qualitative study

audienceidiopathic intolerance attributed electromagnetic attributed electromagnetic exposure. electro hypersensitive repeatedly provocation perceived originates psychological nocebo responses. examines qualitative aimed come regard such. forty diagnosed interviewed. typified attribution elaborated inductively narratives. composed seven onset discovery gathering implicit appearance conviction experimentation conscious acceptance conviction. questioning originates nocebo perceived exposure. sixth potentially reinforcing attribution. originate psychological

exact_dup

52301170

10.1093/gji/ggv155

submitted to Geophysical Journal InternationalInternational audienceSeismic studies indicate that the Earth's inner core has a complex structure and exhibits a strong elastic anisotropy with a cylindrical symmetry. Among the various models which have been proposed to explain this anisotropy, one class of models considers the effect of the Lorentz force associated with the magnetic field diffused within the inner core. In this paper we extend previous studies and use analytical calculations and numerical simulations to predict the geometry and strength of the flow induced by the poloidal component of the Lorentz force in a neutrally or stably stratified growing inner core, exploring also the effect of different types of boundary conditions at the inner core boundary (ICB). Unlike previous studies, we show that the boundary condition that is most likely to produce a significant deformation and seismic anisotropy is impermeable, with negligible radial flow through the boundary. Exact analytical solutions are found in the case of a negligible effect of buoyancy forces in the inner core (neutral stratification), while numerical simulations are used to investigate the case of stable stratification. In this situation, the flow induced by the Lorentz force is found to be localized in a shear layer below the ICB, which thickness depends on the strength of the stratification, but not on the magnetic field strength. We obtain scaling laws for the thickness of this layer, as well as for the flow velocity and strain rate in this shear layer as a function of the control parameters, which include the magnitude of the magnetic field, the strength of the density stratification, the viscosity of the inner core, and the growth rate of the inner core. We find that the resulting strain rate is probably too small to produce significant texturing unless the inner core viscosity is smaller than about $10^{12}$ Pa.s

Earth's Inner Core dynamics induced by the Lorentz force

earth's inner core dynamics induced by the lorentz force

submitted geophysical internationalinternational audienceseismic earth exhibits elastic anisotropy cylindrical symmetry. anisotropy considers lorentz diffused core. extend predict poloidal lorentz neutrally stably stratified growing exploring unlike deformation seismic anisotropy impermeable negligible boundary. negligible buoyancy forces neutral stratification stratification. lorentz localized stratification strength. laws stratification viscosity core. probably texturing unless viscosity pa.s

exact_dup

52303576

10.1016/j.dnarep.2012.12.002

International audienceReplication Protein A (RPA) is an evolutionary conserved essential complex with single-stranded DNA binding properties that has been implicated in numerous DNA transactions. At damaged telomeres, Saccharomyces cerevisiae RPA recruits the Mec1-Ddc2 module of the DNA damage checkpoint network, its only known function in DNA damage signaling. Here, we describe rfa1 mutants (rfa1-1, rfa1-9, rfa1-10, rfa1-11 and rfa1-12) that are proficient in this checkpoint but nevertheless exhibit deregulation of cell cycle control upon telomere uncapping induced by the cdc13-1 mutation. Overriding of this damage-induced checkpoint-independent cell cycle block in the rfa1 mutants was suppressed following genetic inactivation of either TEL1 or EST2/telomerase. Altogether, our results suggest that a previously non-suspected function of RPA is to block cell cycle progression upon telomere uncapping using a yet unidentified pathway that functions in a Mec1-Ddc2-independent manner. We propose that in the rfa1 mutants, ill-masking of uncapped telomeres provokes inappropriate access of Tel1 and inappropriate functioning of telomerase, which, by yet unknown mechanisms, allows cell division to take place in spite of the block established by the DNA damage checkpoint. In the present study, we also observed that upon telomere uncapping, rfa1-12, but not the other studied rfa1 mutants, triggered telomeric recombination in the presence of functional telomerase. In conclusion, the present study identifies a novel pathway of telomere end protection that utilizes a previously unsuspected function of RPA at the telomeres

RPA provides checkpoint-independent cell cycle arrest and prevents recombination at uncapped telomeres of Saccharomyces cerevisiae

rpa provides checkpoint-independent cell cycle arrest and prevents recombination at uncapped telomeres of saccharomyces cerevisiae

audiencereplication evolutionary conserved stranded implicated numerous transactions. damaged telomeres saccharomyces cerevisiae recruits module checkpoint signaling. mutants proficient checkpoint nevertheless exhibit deregulation telomere uncapping mutation. overriding checkpoint mutants suppressed inactivation telomerase. altogether suspected progression telomere uncapping unidentified manner. propose mutants masking uncapped telomeres provokes inappropriate inappropriate functioning telomerase unknown division spite checkpoint. telomere uncapping mutants triggered telomeric recombination telomerase. identifies telomere protection utilizes unsuspected telomeres

exact_dup

52313116

10.1088/0004-637X/759/2/80

International audienceFor the first time, we have directly measured the transport of a vector magnetic field by isotropic turbulence in a high Reynolds number liquid metal flow. In analogy with direct measurements of the turbulent Reynolds stress (turbulent viscosity) that governs momentum transport, we have measured the turbulent electromotive force (emf) by simultaneously measuring three components of velocity and magnetic fields, and computed the correlations that lead to mean-field current generation. Furthermore, we show that this turbulent emf tends to oppose and cancel out the local current, acting to increase the effective resistivity of the medium, i.e., it acts as an enhanced magnetic diffusivity. This has important implications for turbulent transport in astrophysical objects, particularly in dynamos and accretion disks

Direct observation of the turbulent emf and transport of magnetic field in a liquid sodium experiment

direct observation of the turbulent emf and transport of magnetic field in a liquid sodium experiment

audiencefor isotropic turbulence reynolds flow. analogy turbulent reynolds turbulent viscosity governs turbulent electromotive simultaneously measuring generation. turbulent tends oppose cancel acting resistivity i.e. acts diffusivity. turbulent astrophysical dynamos accretion disks

exact_dup

52317725

10.1007/s00220-009-0878-1

74 pagesInternational audienceWe investigate the asymptotic behavior of a generalized sine kernel acting on a finite size interval [-q,q]. We determine its asymptotic resolvent as well as the first terms in the asymptotic expansion of its Fredholm determinant. Further, we apply our results to build the resolvent of truncated Wiener--Hopf operators generated by holomorphic symbols. Finally, the leading asymptotics of the Fredholm determinant allows us to establish the asymptotic estimates of certain oscillatory multidimensional coupled integrals that appear in the study of correlation functions of quantum integrable models

Riemann-Hilbert approach to a generalized sine kernel and applications

riemann-hilbert approach to a generalized sine kernel and applications

pagesinternational audiencewe asymptotic sine kernel acting asymptotic resolvent asymptotic fredholm determinant. build resolvent truncated wiener hopf holomorphic symbols. asymptotics fredholm determinant establish asymptotic oscillatory multidimensional integrals integrable

exact_dup

52326653

10.1016/j.gca.2007.03.009

International audienceKimberlites from West Greenland have Hf-Nd isotope as well as major and trace element compositions that are similar to other Group I kimberlites, but that are distinctive in the spectrum of magmas sampled at Earth's surface. The West Greenland kimberlites have εNdi that ranges from +1.6 to +3.1 and εHfi that ranges from −4.3 to +4.9. The samples exhibit ubiquitous negative ΔεHfi (deviation from the ocean island basalt εHf-εNd reference line), ranging from −1.8 to −11.2. The kimberlites are characterized by steep heavy rare earth element patterns, positive Ta-Nb anomalies and negative Hf-Zr anomalies. These chemical signals are consistent with the presence of ancient, subducted oceanic crust in the kimberlite source region. In the model we present, dewatering and possibly partial melting of rutile-bearing oceanic crust during subduction results in characteristic trace element patterns in the residual crust. During aging, the Hf-Nd isotopic composition of this dewatered/partially melted EMORB-type crust evolves to negative ΔεHfi values. Metasomatic fluids derived from this ancient subducted oceanic crust infiltrate and impart their trace element and isotopic signal on proximal peridotitic mantle. Melting of this metasomatized mantle peridotite results in kimberlite magmas

Constraints on source-forming processes of West Greenland kimberlites inferred from Hf-Nd isotope systematics.

constraints on source-forming processes of west greenland kimberlites inferred from hf-nd isotope systematics.

audiencekimberlites west greenland isotope trace compositions kimberlites distinctive magmas sampled earth surface. west greenland kimberlites εndi ranges εhfi ranges exhibit ubiquitous δεhfi ocean island basalt ranging kimberlites steep rare earth anomalies anomalies. ancient subducted oceanic crust kimberlite region. dewatering possibly melting rutile bearing oceanic crust subduction trace residual crust. aging isotopic dewatered partially melted emorb crust evolves δεhfi values. metasomatic fluids ancient subducted oceanic crust infiltrate impart trace isotopic proximal peridotitic mantle. melting metasomatized mantle peridotite kimberlite magmas

exact_dup

52422272

10.1007/s00381-015-2920-2

International audiencePurposes The purpose of this study was to retrospectively study embryonal tumors with multilayered rosettes (ETMR), a rare new entity that gathers ETAN-TR (embryonal tumor with abundant neuropil and true rosettes), ependymoblastomas, and medulloepitheliomas, in order to improve their descriptions and try to better define therapeutic modalities. Methods: Patients with ETMR, ETAN-TR, ependymoblastoma, and medulloepithelioma treated in SFCE centres (Société Française de lutte contre les Cancers et les leucémies de l'Enfant et de l'adolescent) since 2000 were collected. Data were retrieved from clinical charts.Results: Thirty-eight patients were included in the analysis. Seventeen had an ETAN-TR, 13 had a medulloepithelioma, and 8 had an ETMR. No ependymoblastoma was included. The median age at diagnosis was 31 months (range, 2.8–141 months). The predominant tumor location was supratentorial (66 %); 18.4 % patients had metastatic lesion. LIN28A expression was positive in 11/11 patients. Amplification of the locus 19q13.42 was positive in 10/12 patients. Thirty patients were treated according to the primitive neuroectodermal tumors of high risk (PNET-HR) protocol. The median time of follow-up was 0.9 years (range 0.1 to 15.3 years). The 1-year event-free survival (EFS) and overall survival (OS) were, respectively, 36 % CI 95 % (23–55) and 45 % CI 95 % (31–64). On multivariate analysis, complete surgical resection, radiotherapy, and high-dose chemotherapy were associated with a better overall survival with a relative risk of, respectively, 7.9 CI 95 % (2.6–23.5) p < 0.0002, 41.8 CI 95 % (9.4–186) p < 0.0001, and 3.5 CI 95 % (1.3–9.5) p = 0.012.Conclusion: Prognosis of ETMR remains dismal despite multimodal therapy. LIN28A immunostaining and 19q13.42 amplification should be systematically done to secure the diagnosis. Complete surgical resection, radiotherapy, and high-dose chemotherapy are associated with better outcome

Embryonal tumors with multilayered rosettes in children: the SFCE experience

embryonal tumors with multilayered rosettes in children: the sfce experience

audiencepurposes retrospectively embryonal tumors multilayered rosettes etmr rare entity gathers etan embryonal abundant neuropil rosettes ependymoblastomas medulloepitheliomas descriptions therapeutic modalities. etmr etan ependymoblastoma medulloepithelioma sfce centres société française lutte contre cancers leucémies enfant adolescent collected. retrieved charts.results thirty eight analysis. seventeen etan medulloepithelioma etmr. ependymoblastoma included. predominant supratentorial metastatic lesion. patients. amplification locus patients. thirty primitive neuroectodermal tumors pnet protocol. multivariate surgical resection radiotherapy chemotherapy .conclusion prognosis etmr dismal multimodal therapy. immunostaining amplification systematically secure diagnosis. surgical resection radiotherapy chemotherapy

exact_dup

52429462

10.1051/proc/201340005

International audienceWe examine in this paper the accuracy of some approximations of the Baer-Nunziato two-phase flow model. The governing equations and their main properties are recalled, and two distinct numerical schemes are investigated, including a classical second-order extension relying on symmetrizing variables. Shock tube cases are considered, and two simple Riemann problems based on well-balanced initial data are detailed. These enable to recover the expected convergence rates. However, it is shown that these simple cases are indeed very difficult and that the accuracy of basic schemes is rather poor

APPROXIMATE SOLUTIONS OF THE BAER-NUNZIATO MODEL

approximate solutions of the baer-nunziato model

audiencewe examine approximations baer nunziato model. governing recalled schemes relying symmetrizing variables. shock tube riemann balanced detailed. enable recover rates. schemes

exact_dup

52430432

10.1016/j.pocean.2015.05.024

Carpentier EA 7316International audienceLeptocephali are the poorly-understood transparent larvae of elopomorph fishes that live in the ocean surface layer throughout the world’s tropical and subtropical oceans. Their feeding ecology has been difficult to understand because they appear to primarily feed on particulate organic material (POM), which contains few identifiable objects, and there have been few studies on their diets or trophic positions. This study presents the first results on the trophic position of c.a. 50 leptocephali belonging to 7 families of leptocephali that were compared to 30 taxa of other marine animals and to POM samples. To that end, the carbon and nitrogen stable isotope ratios were analyzed on specimens of leptocephali, various taxa of mesozooplankon, cephalopods, fishes, and POM collected west of the Mascarene Plateau in the western Indian Ocean. Nitrogen and carbon isotopic ratio analyses indicated that the 12 taxa of DNA barcoded leptocephali (≥15 species) could be separated into 2 groups of species with either higher (Group 1: 9 taxa of 7 families, 25–91 mm) or lower (Group 2: 3 taxa of 2 families, 43–275 mm) δ15N ranges. Group 2 exclusively included species that reach much larger sizes of > 150–200 mm (Nemichthys and Avocettina, 3 species of Ariosoma-type), whereas Group 1 included Anguilla bicolor bicolor, Serrivomeridae, Muraenidae, Congridae (3 species), Chlopsidae, Ophichthidae (2 species), and Thalassenchelys. Differences in feeding depths, the types of POM ingested by preference or because of different jaw morphology, or the transport of larvae from other regions with different isotopic signatures are possible reasons for the differences between the two groups. The isotopic signatures of 14 taxa of copepods had higher but slightly overlapping δ15N and δ13C signatures compared to leptocephali and most crustaceans and other mezozooplankton, cephalopods and mesopelagic fish taxa had even higher values. The δ15N and δ13C signatures and composition of POM were variable spatially and with depth and may have been influenced by particulates originating from the shallow banks of the Mascarene Plateau. The two apparent isotopic groups of leptocephali should be examined in relation to their consumption of POM, which can include various proportions of prokaryotes, phytoplankton, protozoans, discarded appendicularian houses and other materials, by conducting further studies in different regions and using a variety of techniques

Stable isotopic composition of anguilliform leptocephali and other food web components from west of the Mascarene Plateau

stable isotopic composition of anguilliform leptocephali and other food web components from west of the mascarene plateau

carpentier audienceleptocephali poorly understood transparent larvae elopomorph fishes live ocean world’s tropical subtropical oceans. feeding ecology primarily feed particulate identifiable diets trophic positions. presents trophic c.a. leptocephali belonging families leptocephali taxa marine samples. nitrogen isotope specimens leptocephali taxa mesozooplankon cephalopods fishes west mascarene plateau indian ocean. nitrogen isotopic taxa barcoded leptocephali separated taxa families taxa families ranges. exclusively sizes nemichthys avocettina ariosoma anguilla bicolor bicolor serrivomeridae muraenidae congridae chlopsidae ophichthidae thalassenchelys. feeding depths ingested preference morphology larvae isotopic signatures reasons groups. isotopic signatures taxa copepods overlapping signatures leptocephali crustaceans mezozooplankton cephalopods mesopelagic fish taxa values. signatures spatially influenced particulates originating shallow banks mascarene plateau. apparent isotopic leptocephali proportions prokaryotes phytoplankton protozoans discarded appendicularian houses conducting

exact_dup

52433123

10.1016/j.jconhyd.2015.06.007

International audienceWater flow and TiO2 nanoparticle (NP) transfer in a fractured hard-rock aquifer were studied in a tracer test experiment at a pilot site in Brittany, France. Results from the Br tracer test show that the schist aquifer can be represented by a two-layer medium comprising i) fractures with low longitudinal dispersivity in which water and solute transport is relatively fast, and ii) a network of small fissures with high longitudinal dispersivity in which transport is slower. Although a large amount of NPs was retained within the aquifer, a significant TiO2 concentration was measured in a well 15 m downstream of the NP injection well, clearly confirming the potential for TiO2 NPs to be transported in groundwater. The Ti concentration profile in the downstream well was modelled using a two-layer medium approach. The delay used for the TiO2 NPs simulation compared to the Br concentration profiles in the downstream well indicate that the aggregated TiO2 NPs interacted with the rock. Unlike Br, NPs do not penetrate the entire pore network during transfer because of electrostatic interactions between NP aggregates and the rock and also to the aggregate size and the hydrodynamic conditions, especially where the porosity is very low; NPs with a weak negative charge can be attached onto the rock surface, and more particularly onto the positively charged iron oxyhydroxides coating the main pathways due to natural denitrification. Nevertheless, TiO2 NPs are mobile and transfer within fracture and fissure media. Any modification of the aquifer’s chemical conditions is likely to impact the groundwater pH and, the nitrate content and the denitrification process, and thus affect NP aggregation and attachment

Evidence for TiO2 nanoparticle transfer in a hard-rock aquifer

evidence for tio2 nanoparticle transfer in a hard-rock aquifer

audiencewater nanoparticle fractured rock aquifer tracer pilot brittany france. tracer schist aquifer comprising fractures longitudinal dispersivity solute fissures longitudinal dispersivity slower. retained aquifer downstream injection confirming transported groundwater. downstream modelled approach. delay downstream aggregated interacted rock. unlike penetrate pore electrostatic aggregates rock aggregate hydrodynamic porosity attached rock positively iron oxyhydroxides coating pathways denitrification. nevertheless mobile fracture fissure media. modification aquifer’s groundwater nitrate denitrification aggregation attachment

exact_dup

52648542

10.1007/s00285-012-0538-5

19 pagesInternational audienceA system of nonlinear hyperbolic partial differential equations is derived using mixture theory to model the formation of biofilms. In contrast with most of the existing models, our equations have a finite speed of propagation, without using artificial free boundary conditions. Adapted numerical scheme will be described in detail and several simulations will be presented in one and more space dimensions in the particular case of cyanobacteria biofilms. Besides, the numerical scheme we present is able to deal in a natural and effective way with regions where one of the phases is vanishing

A fluid dynamics model of the growth of phototrophic biofilms.

a fluid dynamics model of the growth of phototrophic biofilms.

pagesinternational audiencea hyperbolic mixture biofilms. propagation artificial conditions. adapted cyanobacteria biofilms. besides deal vanishing

exact_dup

52676723

10.1051/0004-6361/201322217

International audienceWe study the evolution of the dust temperature of galaxies in the SFR− M∗ plane up to z ~ 2 using far-infrared and submillimetre observations from the Herschel Space Observatory taken as part of the PACS Evolutionary Probe (PEP) and Herschel Multi-tiered Extragalactic Survey (HerMES) guaranteed time key programmes. Starting from a sample of galaxies with reliable star-formation rates (SFRs), stellar masses (M∗) and redshift estimates, we grid the SFR− M∗parameter space in several redshift ranges and estimate the mean dust temperature (Tdust) of each SFR–M∗ − z bin. Dust temperatures are inferred using the stacked far-infrared flux densities (100–500  μm) of our SFR–M∗ − z bins. At all redshifts, the dust temperature of galaxies smoothly increases with rest-frame infrared luminosities (LIR), specific SFRs (SSFR; i.e., SFR/M∗), and distances with respect to the main sequence (MS) of the SFR− M∗ plane (i.e., Δlog (SSFR)MS = log [SSFR(galaxy)/SSFRMS(M∗,z)]). The Tdust − SSFR and Tdust − Δlog (SSFR)MS correlations are statistically much more significant than the Tdust − LIR one. While the slopes of these three correlations are redshift-independent, their normalisations evolve smoothly from z = 0 and z ~ 2. We convert these results into a recipe to derive Tdust from SFR, M∗ and z, valid out to z ~ 2 and for the stellar mass and SFR range covered by our stacking analysis. The existence of a strong Tdust − Δlog (SSFR)MS correlation provides us with several pieces of information on the dust and gas content of galaxies. Firstly, the slope of the Tdust − Δlog (SSFR)MS correlation can be explained by the increase in the star-formation efficiency (SFE; SFR/Mgas) with Δlog (SSFR)MS as found locally by molecular gas studies. Secondly, at fixed Δlog (SSFR)MS, the constant dust temperature observed in galaxies probing wide ranges in SFR and M∗ can be explained by an increase or decrease in the number of star-forming regions with comparable SFE enclosed in them. And thirdly, at high redshift, the normalisation towards hotter dust temperature of the Tdust − Δlog (SSFR)MS correlation can be explained by the decrease in the metallicities of galaxies or by the increase in the SFE of MS galaxies. All these results support the hypothesis that the conditions prevailing in the star-forming regions of MS and far-above-MS galaxies are different. MS galaxies have star-forming regions with low SFEs and thus cold dust, while galaxies situated far above the MS seem to be in a starbursting phase characterised by star-forming regions with high SFEs and thus hot dust

The evolution of the dust temperatures of galaxies in the SFR–M∗ plane up to z similar to 2

the evolution of the dust temperatures of galaxies in the sfr–m∗ plane up to z similar to 2

audiencewe sfr− infrared submillimetre herschel observatory pacs evolutionary herschel tiered extragalactic hermes guaranteed programmes. reliable sfrs sfr− m∗parameter ranges tdust sfr–m∗ bin. inferred stacked infrared densities sfr–m∗ bins. redshifts smoothly infrared luminosities sfrs ssfr i.e. distances sfr− i.e. δlog ssfr ssfr ssfrms tdust ssfr tdust δlog ssfr statistically tdust one. slopes normalisations evolve smoothly convert recipe derive tdust valid covered stacking analysis. tdust δlog ssfr pieces galaxies. firstly tdust δlog ssfr mgas δlog ssfr locally studies. secondly δlog ssfr probing ranges forming comparable enclosed them. thirdly normalisation hotter tdust δlog ssfr metallicities galaxies. prevailing forming different. forming sfes cold situated seem starbursting characterised forming sfes

exact_dup

52678606

10.1002/adfm.201401633

International audienceThis work is a re-investigation of the impact of blend morphology and thermal annealing on the electrical performance of regioregular P3HT:PC 60 BM. The blend is first characterized by combining atomic force microscopy, X-rays diffraction and Time-of-Flight experiments. Then, current-voltage characteristics of photodiode devices are measured in the dark and under illumination. Finally, the existence of exponential tails of electronic gap states is experimentally confirmed by measuring the device spectral response in the sub-band gap regime. This method reveals the existence of a large density of gap states, which is partially reduced by successive annealing steps. The comparison between drift and diffusion 2 simulations and charge transport experiments show that, when band gap tails are properly taken into account, simulations can satisfactorily reproduce experimental currents under both dark and illumination conditions as a function of voltage and annealing time. This work further confirms the critical impact of tails states on the performance of solar cells

Impact of Blend Morphology on Interface State Recombination in Bulk Heterojunction Organic Solar Cells

impact of blend morphology on interface state recombination in bulk heterojunction organic solar cells

audiencethis blend morphology annealing electrical regioregular blend combining microscopy rays diffraction flight experiments. photodiode devices illumination. exponential tails experimentally confirmed measuring regime. reveals partially successive annealing steps. drift tails properly satisfactorily reproduce currents illumination annealing time. confirms tails

exact_dup

52682095

10.1007/978-3-642-40810-6

International audienceIn this article we propose to investigate the analogy between early cortical folding process and cortical smoothing by mean curvature flow. First, we introduce a one-parameter model that is able to fit a developmental trajectory as represented in a Volume-Area plot and we propose an efficient optimization strategy for parameter estimation. Second, we validate the model on forty cortical surfaces of preterm newborns by comparing global geometrical indices and trajectories of central sulcus along developmental and simulation time

Surface smoothing: a way back in early brain morphogenesis.

surface smoothing: a way back in early brain morphogenesis.

audiencein propose analogy cortical folding cortical smoothing curvature flow. developmental trajectory propose estimation. validate forty cortical preterm newborns geometrical indices trajectories sulcus developmental

exact_dup

52711692

10.1002/jgre.20146

International audienceThe lower atmosphere of Venus below the clouds is a transitional region between the relatively calm lowermost scale height and the super-rotating atmosphere in the cloud region and above. Any observational constraint is then welcome to help in the development of general circulation models of Venus, a difficult task considering the thickness of its atmosphere. Starting from a state-of-the-art 3D Venus GCM [Lebonnois et al., 2010], we have included passive tracers in order to investigate the latitudinal variability of two minor gaseous species, carbonyl sulfide (OCS) and carbon monoxide (CO), whose vertical profiles and mixing ratios are known to vary with latitude between 30 and 40 km [Marcq et al., 2008]. The relaxation to chemical equilibrium is crudely parametrized through a vertically uniform timescale τ. A satisfactory agreement with available observations is obtained with 108 s ≲ τCO ≲ 5 * 108 s and 107 s ≲ τOCS ≲ 10 s. These results, in addition to validating the general circulation below the clouds, are also helpful in characterizing the chemical kinetics of Venus' atmosphere. This complements the much more sophisticated chemical models which focus more on thermodynamical equilibrium [Yung et al., 2009; Krasnopolsky, 2007]

Simulations of the latitudinal variability of CO-like and OCS-like passive tracers below the clouds of Venus using the Laboratoire de Météorologie Dynamique GCM

simulations of the latitudinal variability of co-like and ocs-like passive tracers below the clouds of venus using the laboratoire de météorologie dynamique gcm

audiencethe atmosphere venus clouds transitional calm lowermost super rotating atmosphere above. observational welcome circulation venus atmosphere. venus lebonnois passive tracers latitudinal minor gaseous carbonyl sulfide monoxide vary latitude marcq relaxation crudely parametrized vertically timescale satisfactory τocs validating circulation clouds helpful characterizing kinetics venus atmosphere. complements sophisticated thermodynamical yung krasnopolsky

exact_dup

52715708

10.1016/j.oregeorev.2015.06.015

International audienceSupergene manganese deposits commonly contain K-rich Mn oxides with tunnel structure, such ascryptomelane, which are suitable for radiometric dating using the 39Ar–40Ar method. In Africa, Mn depositshave been dated by this method for localities in western and southern parts of the continent, whereas onlysome preliminary data are available for Central Africa. Herewe present new39Ar–40Ar ages for Mnoxide samplesof the Kisenge deposit, in southwestern Katanga, Democratic Republic of the Congo. The samples represent supergeneMn oxide deposits that formed at the expense of primary Paleoproterozoic rhodochrosite-dominatedcarbonate ores. Main phases of Mn oxide formation are dated at c. 10.5 Ma, 3.6 Ma and 2.6 Ma for a core thatcrosses a mineralized interval. The latter shows a decrease in age with increasing depth, recording downwardpenetration of a weathering front. Surface samples of the Kisenge deposits also record a ≥c.19.2 Ma phase, aswell as c. 15.7 Ma, 14.2 Ma and 13.6 Ma phases. The obtained ages correspond to distinct periods of paleosurfacedevelopment and stability during the Mio-Pliocene in Katanga. Because Katanga is a key area bordered to theNorth by the Congo Basin and to the East by the East African Rift System, these ages also provide constraintsfor the geodynamic evolution of the entire region. For the Mio-Pliocene, the Kisenge deposits record ages thatare not systematically found elsewhere in Africa, although the 10.5–11 Ma event corresponds to a roughly simultaneousevent in the Kalahari Manganese Field, South Africa. The rest of the Katanga paleosurface record differssomewhat fromrecords for other parts of Africa, forwhich older, Eocene ages have been obtained. This differenceis most probably related to the specific regional geodynamic context: uplift of the East African Plateau, with associatederosion, and the opening of the East African Rift System at c. 25 Ma are events whose effects, in thestudy area, interfere with those of processes responsible for the development of continent-wide paleosurfaces

The age of supergene manganese deposits in Katanga and its implications for the Neogene evolution of the African Great Lakes Region

the age of supergene manganese deposits in katanga and its implications for the neogene evolution of the african great lakes region

audiencesupergene manganese deposits commonly oxides tunnel ascryptomelane radiometric dating method. africa depositshave dated localities southern continent onlysome preliminary africa. herewe ages mnoxide samplesof kisenge deposit southwestern katanga democratic republic congo. supergenemn oxide deposits expense paleoproterozoic rhodochrosite dominatedcarbonate ores. oxide dated thatcrosses mineralized interval. recording downwardpenetration weathering front. kisenge deposits record aswell phases. ages paleosurfacedevelopment pliocene katanga. katanga bordered thenorth congo basin east east african rift ages constraintsfor geodynamic region. pliocene kisenge deposits record ages thatare systematically elsewhere africa roughly simultaneousevent kalahari manganese africa. katanga paleosurface record differssomewhat fromrecords africa forwhich older eocene ages obtained. differenceis probably geodynamic uplift east african plateau associatederosion opening east african rift thestudy interfere continent paleosurfaces

exact_dup

52717361

10.1002/GRL.50154

International audienceIO, BrO, and NO2 were measured for the first time at Dumont d'Urville (East Antarctic coast) during summer 2011/2012 by using a near-UV-Visible laser spectrometer based on mode-locked cavity-enhanced absorption spectroscopy. IO mixing ratios ranged from the 2σ detection limit (0.04 pptv) up to 0.15 pptv. BrO remained close or below the detection limit (2 pptv) of the instrument. Daily averaged NO2 values ranged between the detection limit (10 pptv) and 60 pptv being far higher than levels of a few pptv commonly observed in the remote marine boundary layer. Data are discussed and compared with those available for another coastal Antarctic station (Halley, West Antarctica). It is shown that the oxidative capacity of the atmospheric boundary layer at coastal Antarctic sites is quite different in nature from West to East Antarctica, with the halogen chemistry being promoted at West and the OH chemistry at East

First investigations of IO, BrO, and NO2 summer atmospheric levels at a coastal East Antarctic site using mode-locked cavity enhanced absorption spectroscopy

first investigations of io, bro, and no2 summer atmospheric levels at a coastal east antarctic site using mode-locked cavity enhanced absorption spectroscopy

audienceio dumont urville east antarctic coast summer visible spectrometer locked cavity spectroscopy. ranged pptv pptv. remained pptv instrument. averaged ranged pptv pptv pptv commonly remote marine layer. coastal antarctic station halley west antarctica oxidative coastal antarctic west east antarctica halogen promoted west east

exact_dup

52718465

10.1016/j.icarus.2014.12.015

International audienceIn this paper we present the results on the polarimetric and spectroscopic observations of the potentially hazardous Asteroid (214869) 2007 PA8 obtained during its favorable apparition in October–November 2012, when it approached the Earth at the minimal distance of 0.043 AU. Polarimetry was carried out at the NOT in the B, V, R, and I bands covering both low (12–23°) and large phase angles (88–99°). Spectroscopy in the visible and near infrared range was obtained at the TNG telescope.The spectrum of 2007 PA8 shows silicates absorption features and a behavior consistent with a Q-type classification. The olivine and pyroxene BI band is centered at 0.9578 ± 0.0042 μm, with a band depth of 16.5%, the BII band is centered at 1.95 ± 0.01 μm, and it has a band depth of about 3.9%. The 2007 PA8 spectral parameters are consistent with those of L chondrites. Also the spectral comparison with meteorites gives the L-type chondrites, and L6 in particular, as best match.The NEA (214869) 2007 PA8 is the forth moderate albedo asteroid and the first Q-type asteroid for which the value of the polarization maximum is determined. The inversion angle of the polarization curve in the V filter is 19.0 ± 1.1°, the corresponding slope parameter (h ) is of 0.078 ± 0.010%/°, the maximum value of polarization is 5.99 ± 0.16%, and the extreme value of negative polarization is estimated to be lower than −0.52%. Using the polarimetric slope we derive a geometric albedo of 0.29 ± 0.08 in the V band, that gives an estimated diameter of 1.4 ± 0.2 km, assuming an absolute HvHv magnitude of 16.2 mag. We find a strong dependence of the polarization in the B, V, R, and I bands with wavelength, and the polarimetric albedo in the four bands is strongly correlated with the asteroid’s spectrum. The 2007 PA8 polarimetric properties resemble those of other 2 NEAs, 1566 Icarus and 25143 Itokawa, which are both S(IV)/Q type.Our spectral and polarimetric analysis indicate that 2007 PA8 has a young and fresh surface almost unweathered, similar to L-type chondrites. These results, together with dynamical simulations made by Nedelcu et al. (Nedelcu, D. A., Birlan, M., Popescu, M., Badescu, O., Pricopi, D. [2014]. Astron. Astrophys. 567, L7, 5pp.) and Nesvorny et al. (Nesvorny, D., Vokrouhlicky, D., Morbidelli, A., Bottke, W. F. [2009]. Icarus 200, 698–701), indicate that 2007 PA8 may be a member of the Gefion family recently ejected from the 5:2 resonance and a potential source of L chondrites

The potentially hazardous Asteroid (214869) 2007 PA8: An unweathered L chondrite analog surface

the potentially hazardous asteroid (214869) 2007 pa8: an unweathered l chondrite analog surface

audiencein polarimetric spectroscopic potentially hazardous asteroid favorable apparition october–november approached earth polarimetry covering angles spectroscopy visible infrared telescope.the silicates classification. olivine pyroxene centered centered chondrites. meteorites chondrites match.the forth moderate albedo asteroid asteroid determined. inversion filter extreme polarimetric derive geometric albedo hvhv mag. polarimetric albedo asteroid’s spectrum. polarimetric resemble neas icarus itokawa type.our polarimetric fresh unweathered chondrites. nedelcu nedelcu birlan popescu badescu pricopi astron. astrophys. nesvorny nesvorny vokrouhlicky morbidelli bottke icarus member gefion ejected chondrites

exact_dup

52720678

10.1016/j.advwatres.2014.04.014

International audienceWe study solute transport in a periodic channel with a sinusoidal wavy boundary when inertial flow effects are sufficiently large to be important, but do not give rise to turbulence. This configuration and setup are known to result in large recirculation zones that can act as traps for solutes; these traps can significantly affect dispersion of the solute as it moves through the domain. Previous studies have considered the effect of inertia on asymptotic dispersion in such geometries. Here we develop an effective spatial Markov model that aims to describe transport all the way from preasymptotic to asymptotic times. In particular we demonstrate that correlation effects must be included in such an effective model when Péclet numbers are larger than O(100) in order to reliably predict observed breakthrough curves and the temporal evolution of second centered moments. For smaller Péclet numbers correlation effects, while present, are weak and do not appear to play a significant role. For many systems of practical interest, if Reynolds numbers are large, it may be typical that Péclet numbers are large also given that Schmidt numbers for typical fluids and solutes can vary between 1 and 500. This suggests that when Reynolds numbers are large, any effective theories of transport should incorporate correlation as part of the upscaling procedure, which many conventional approaches currently do not do. We define a novel parameter to quantify the importance of this correlation. Next, using the theory of CTRWs we explain a to date unexplained phenomenon of why dispersion coefficients for a fixed Péclet number increase with increasing Reynolds number, but saturate above a certain value. Finally we also demonstrate that effective preasymptotic models that do not adequately account for velocity correlations will also not predict asymptotic dispersion coefficients correctly

Modeling preasymptotic transport in flows with significant inertial and trapping effects - The importance of velocity correlations and a spatial Markov model

modeling preasymptotic transport in flows with significant inertial and trapping effects - the importance of velocity correlations and a spatial markov model

audiencewe solute sinusoidal wavy inertial sufficiently turbulence. setup recirculation zones traps solutes traps solute moves domain. inertia asymptotic geometries. markov aims preasymptotic asymptotic times. péclet reliably predict breakthrough centered moments. péclet role. practical reynolds péclet schmidt fluids solutes vary reynolds incorporate upscaling quantify correlation. ctrws unexplained phenomenon péclet reynolds saturate value. preasymptotic adequately predict asymptotic correctly

exact_dup

52723876

10.1016/j.csda.2014.03.006

International audienceA semiparametric regression model of a q-dimensional multivariate response y on a p-dimensional covariate x is considered. A new approach is proposed based on sliced inverse regression (SIR) for estimating the effective dimension reduction (EDR) space without requiring a prespecified parametric model. The convergence at rate square root of n of the estimated EDR space is shown. The choice of the dimension of the EDR space is discussed. Moreover, a way to cluster components of y related to the same EDR space is provided. Thus, the proposed multivariate SIR method can be used properly on each cluster instead of blindly applying it on all components of y. The numerical performances of multivariate SIR are illustrated on a simulation study. Applications to a remote sensing dataset and to the Minneapolis elementary schools data are also provided. Although the proposed methodology relies on SIR, it opens the door for new regression approaches with a multivariate response

A new sliced inverse regression method for multivariate response

a new sliced inverse regression method for multivariate response

audiencea semiparametric multivariate covariate considered. sliced estimating requiring prespecified parametric model. shown. discussed. provided. multivariate properly blindly performances multivariate illustrated study. remote sensing dataset minneapolis elementary schools provided. methodology relies opens door multivariate

exact_dup

52726585

10.1016/j.orggeochem.2012.11.008

International audienceIn the frame of a study aimed at defining new soil molecular biomarkers that could attest to former land use and that could also be screened in lake sediments for palaeoenvironmental reconstruction, we analysed the 2-4 cm depth layer of a soil developed under a conifer forest in the Lake Aydat catchment (French Massif Central). The lipid fraction of the sample contained 12 serratenoids bearing at least a methoxyl (OMe) group at C-3 or C-21 and various additional functional groups (alcohol, ketone or acetate). A survey of the literature provided indubitable evidence that these compounds are typical for Pinaceae species, in agreement with the surrounding vegetation at the sampling site. Due to the economic and ecological importance of the taxa, the presence of these highly specific compounds in soil, sediments or peat should therefore help in unravelling the timing of forestry activity

Methoxy-serratenes in a soil under conifers and their potential use as biomarkers of Pinaceae

methoxy-serratenes in a soil under conifers and their potential use as biomarkers of pinaceae

audiencein aimed defining biomarkers attest former screened lake sediments palaeoenvironmental reconstruction analysed conifer forest lake aydat catchment french massif serratenoids bearing methoxyl alcohol ketone acetate indubitable pinaceae surrounding vegetation site. ecological taxa sediments peat unravelling timing forestry

exact_dup

52740061

10.1016/j.quascirev.2009.06.005

International audienceA strong mid-Holocene transition has been identified by wavelet analyses in several sea ice cover records from the circum-Antarctic area, ice core records (Taylor dome, Byrd) and tropical marine records. The results are compared with those previously published in a synthesis of North Atlantic records and with 4 new records from the Norwegian and Icelandic seas and from a coastal site in Ireland. These new records confirm the previous pattern for the North Atlantic area, extend this pattern nearly to the Arctic Circle, and include a continental record. We further tested the possibility of extending this scheme using continental records from South America. The Holocene pattern proposed here confirms the importance of external forcing during the Early Holocene (solar activity: 1000 years cyclicity and 2500 years during the entire Holocene), even if the signal is disturbed by meltwater fluxes. The second part of the Holocene is then marked by the gradual appearance of internal forcing (thermohaline circulation around 1500 years), associated with a stabilisation of the signal. Coupling between ocean and atmosphere seems to play a fundamental role in the observed frequencies which vary accordingly in the Atlantic, circum-Antarctic and Pacific areas. The North Atlantic area seems to be the instigator of thermohaline circulation as shown by its sensitivity to meltwater discharges during the Early Holocene, even though each sector is independent with regards to its frequency content (around 1600 years for Atlantic Area; around 1250 years for Antarctica). The Holocene methane pattern, still under debate [Ruddiman, W.F., 2003a. Orbital insolation, ice volume and greenhouse gases. Quaternary Science Review 22, 1597-1629; Ruddiman, W.F., 2003b. The anthropogenic greenhouse era began thousands of years ago. Climatic Change 61, 261-293], could be explained by a more efficient thermohaline circulation around the mid-Holocene with an anthropogenic effect initiated at not, vert, similar2500 BP as shown by the inter-hemispheric gradient

Evidence from wavelet analysis for a mid-Holocene transition in global climate forcing

evidence from wavelet analysis for a mid-holocene transition in global climate forcing

audiencea holocene wavelet cover records circum antarctic records taylor dome byrd tropical marine records. atlantic records records norwegian icelandic seas coastal ireland. records confirm atlantic extend nearly arctic circle continental record. extending continental records america. holocene confirms forcing holocene cyclicity holocene disturbed meltwater fluxes. holocene marked gradual appearance forcing thermohaline circulation stabilisation signal. ocean atmosphere vary accordingly atlantic circum antarctic pacific areas. atlantic instigator thermohaline circulation meltwater discharges holocene regards atlantic antarctica holocene methane debate ruddiman w.f. orbital insolation greenhouse gases. quaternary ruddiman w.f. anthropogenic greenhouse began thousands ago. climatic thermohaline circulation holocene anthropogenic initiated vert hemispheric

exact_dup

52743051

10.1016/j.precamres.2009.03.011

International audienceThis paper presents a reappraisal of the tectonic evolution of the Zanhuang Massif that lies at the eastern margin of the Trans-North China Orogen, a continent–continent collision belt that marked the amalgamation of the North China Craton in Late Paleoproterozoic. Detailed field work with focus on geometries of structures and kinematics was performed. This was completed with LA-ICP-MS U–Pb analyses on zircon, EPMA U–Th/Pb dating on monazite and 40Ar/39Ar dating on amphibole. These studies led us to propose a new three-fold litho-tectonic subdivision of the massif: The Western Zanhuang Domain (WZD) made of TTG, migmatite and pink anatectic granite is correlated to the Fuping Massif that crops out to the north-west. Both areas represent a continental block, called the Fuping Block, which acquired most of its architecture around 2100 Ma ago. The Eastern Zanhuang Domain (EZD) made of TTG and migmatite represents the western edge of an Eastern Neoarchean Block. In between, the Central Zanhuang Domain (CZD) is a NE–SW trending stack of supracrustal, gneiss and mafic magmatic rocks thrust sheets displaced toward the ESE upon the Eastern Block. The lithological features suggest that the CZD represents the remnant of an oceanic basin, called the Taihang Ocean that closed during the amalgamation of the Eastern Block and the Fuping Block around 1880–1850 Ma. In agreement with recent work done along the western margin of the belt, in the Lüliang Massif, this study documents the amalgamation of the North China Craton in response to the closure of two oceanic basins, namely the Lüliang Ocean and the Taihang Ocean. West-dipping subductions and collisions involving three distinct continental blocks, called the Western, the Fuping and the Eastern Blocks, took place around 1880–1850 Ma

The Zanhuang Massif, the second and eastern suture zone of the Paleoproterozoic Trans-North China Orogen

the zanhuang massif, the second and eastern suture zone of the paleoproterozoic trans-north china orogen

audiencethis presents reappraisal tectonic zanhuang massif lies eastern margin orogen continent–continent collision belt marked amalgamation craton paleoproterozoic. geometries kinematics performed. completed u–pb zircon epma u–th dating monazite dating amphibole. propose litho tectonic subdivision massif zanhuang migmatite pink anatectic granite fuping massif crops west. continental fuping acquired architecture ago. eastern zanhuang migmatite eastern neoarchean block. zanhuang ne–sw trending stack supracrustal gneiss mafic magmatic rocks thrust sheets displaced toward eastern block. lithological remnant oceanic basin taihang ocean amalgamation eastern fuping margin belt lüliang massif documents amalgamation craton closure oceanic basins lüliang ocean taihang ocean. west dipping subductions collisions involving continental blocks fuping eastern blocks took

exact_dup

52785447

10.1080/13662716.2011.583464

International audienceDefence innovation systems are structured around two main groups of players that interact in the development of complex programmes: the state (the client and the government agency) and the systems integrators. Technological and institutional changes since the 1990s have affected the division of labour and knowledge in the industry. In this paper we show the origins of these changes based on information derived from 45 qualitative interviews conducted between 2000 and 2008, which demonstrate the new capabilities that have been created within the national innovation system (NIS). We explain how the role and the capabilities of the French Government Agency for Defence (Direction Générale de l'Armement - DGA) have developed from " project architect " to " project manager ". These new capabilities create new interactions in the French Defence innovation system and new roles for the DGA

Changes in the French defence innovation system: New roles and capabilities for the Government Agency for Defence

changes in the french defence innovation system: new roles and capabilities for the government agency for defence

audiencedefence innovation structured players interact programmes client agency integrators. technological institutional division labour industry. origins qualitative interviews capabilities created innovation capabilities french agency defence générale armement architect manager capabilities create french defence innovation roles

exact_dup

52811896

10.1007/s11069-014-1470-3

International audienceThis paper presents an application of a cellular automaton-based runoff model (RUICELLS) to a series of small dry valleys in the Seine-Maritime department, northern France, to better assess their susceptibility to flash flood. These muddy floods shortly follow high rainfall (50–100 mm in less than 6 h) and occur in very small areas (\20 km 2). A surge generally rushes down through the main valley just a few minutes after rains have peaked. Previous events (n = 69, in the period 1983–2005) have occasionally threatened human lives and have caused significant damage to property and infrastructure. Nonetheless , given the variation among the valleys and the infrequency of events, these floods have not been numerous enough to permit a statistical analysis. Instead, we numerically simulate the possible future flash floods using RUICELLS, a cellular automaton model driven by a set of three deterministic hydrological rules. Simulations have been conducted for 148 basins, each subject to 16 different rainfall scenarios (2.368 simulations in total) to (1) estimate the peak flow discharges (Q), the specific peak flows (Q s), and the lag times (T) of the flash floods and (2) detect the critical rainfall intensities that would trigger warnings and increased vigilance. Our simulations indicate that the number of basins susceptible to flash flooding greatly increases with the higher rainfall intensity, the distribution of sensitive crops (sugar beet, corn, maize, and flax) and the basin morphology. Several small basins could also induce by convergence a bigger flood in the downstream humid valleys. The location of the highest simulated discharges is aligned with observed events, and this comparison provides an evaluation of the modelling performance and of the credibility of the results

A flash flood hazard assessment in dry valleys (northern France) by cellular automata modelling

a flash flood hazard assessment in dry valleys (northern france) by cellular automata modelling

audiencethis presents automaton runoff ruicells valleys seine maritime northern susceptibility flash flood. muddy floods shortly rainfall surge rushes valley minutes rains peaked. occasionally threatened lives infrastructure. nonetheless valleys infrequency floods numerous permit analysis. numerically simulate flash floods ruicells automaton deterministic hydrological rules. basins rainfall scenarios discharges flows flash floods detect rainfall intensities trigger warnings vigilance. basins susceptible flash flooding greatly rainfall crops sugar beet corn maize flax basin morphology. basins induce bigger flood downstream humid valleys. discharges aligned credibility

exact_dup

52818615

10.1007/s10472-015-9456-8

11 pagesInternational audienceGiven a subset of $\R^\ndim$ of non-zero measure, defined through a blackbox function (an oracle), and assuming some regularity properties on this set, we build an efficient data structure representing this set. The naive approach would consists in sampling every point on a regular grid. As compared to it, our data structure has a complexity close to gaining one dimension both in terms of space and in number of calls to the oracle. This data structure produces a characteristic function (i.e. a function that can be used in lieu of the oracle), allows to measure the volume of the set, and allows to compute the distance to the boundary of the set for any point

A kd-tree algorithm to discover the boundary of a black box hypervolume or how to peel potatoes by recursively cutting them in halves

a kd-tree algorithm to discover the boundary of a black box hypervolume or how to peel potatoes by recursively cutting them in halves

pagesinternational audiencegiven ndim blackbox oracle regularity build representing set. naive grid. gaining calls oracle. produces i.e. lieu oracle

exact_dup

52828287

10.1016/j.apenergy.2008.07.005

Voir Documents de travail du Centre d'Economie de la Sorbonne 2007.58 - http://halshs.archives-ouvertes.fr/halshs-00188264/fr/International audienceIn this article, we investigate conditional mean and variance forecasts using a dynamic model following a k-factor GIGARCH process. We are particularly interested in calculating the conditional variance of the prediction error. We apply this method to electricity prices and test spot prices forecasts until one month ahead forecast. We conclude that the k-factor GIGARCH process is a suitable tool to forecast spot prices, using the classical RMSE criteria

Forecasting electricity spot market prices with a k-factor GIGARCH process

forecasting electricity spot market prices with a k-factor gigarch process

voir documents travail economie sorbonne halshs.archives audiencein conditional forecasts gigarch process. interested calculating conditional error. electricity prices spot prices forecasts month ahead forecast. gigarch forecast spot prices rmse

exact_dup

52829700

10.1002/mcda.422

International audienceWe address in this paper the problem of scoring alternatives when they are evaluated with respect to several criteria on a finite ordinal scale $E$. We show that in general, the ordinal scale $E$ has to be refined or shrunk in order to be able to represent the preference of the decision maker by an aggregation operator belonging to the family of mean operators. The paper recalls previous theoretical results of the author giving necessary and sufficient conditions for a representation of preferences, and then focusses on describing practical algorithms and examples

How to score alternatives when criteria are scored on an ordinal scale

how to score alternatives when criteria are scored on an ordinal scale

audiencewe scoring alternatives ordinal ordinal refined shrunk preference maker aggregation belonging operators. recalls giving preferences focusses describing practical

exact_dup

52853008

10.1016/j.ijfoodmicro.2004.10.048

International audienceThe classical D-value of first order inactivation kinetic is not suitable for quantifying bacterial heat resistance for non-log linear survival curves. One simple model derived from the Weibull cumulative function describes non-log linear kinetics of micro-organisms. The influences of environmental factors on Weibull model parameters, shape parameter "p" and scale parameter "delta", were studied. This paper points out structural correlation between these two parameters. The environmental heating and recovery conditions do not present clear and regular influence on the shape the parameter "p" and could not be described by any model tried. Conversely, the scale parameter "delta" depends on heating temperature and heating and recovery medium pH. The models established to quantify these influences on the classical "D" values could be applied to this parameter "delta". The slight influence of the shape parameter p variation on the goodness of fit of these models can be neglected and the simplified Weibull model with a constant p-value for given microbial population can be applied for canning process calculations

Survival curves of heated bacterial spores: effect of environmental factors on Weibull parameters

survival curves of heated bacterial spores: effect of environmental factors on weibull parameters

audiencethe inactivation quantifying bacterial curves. weibull cumulative describes kinetics micro organisms. influences weibull delta studied. parameters. heating recovery tried. conversely delta heating heating recovery quantify influences delta slight goodness neglected simplified weibull microbial canning

exact_dup

52897227

10.1016/j.jtbi.2015.02.029

International audienceWe propose a conceptual and formal characterisation of biological organisation as a closure of constraints. We first establish a distinction between two causal regimes at work in biological systems: processes, which refer to the whole set of changes occurring in non-equilibrium open thermodynamic conditions; and constraints, those entities which, while acting upon the processes, exhibit some form of conservation (symmetry) at the relevant time scales. We then argue that, in biological systems, constraints realise closure, i.e. mutual dependence such that they both depend on and contribute to maintaining each other. With this characterisation in hand, we discuss how organisational closure can provide an operational tool for marking the boundaries between interacting biological systems. We conclude by focusing on the original conception of the relationship between stability and variation which emerges from this framework

Biological organisation as closure of constraints.

biological organisation as closure of constraints.

audiencewe propose conceptual formal characterisation organisation closure constraints. establish distinction causal regimes occurring thermodynamic entities acting exhibit conservation scales. argue realise closure i.e. mutual maintaining other. characterisation organisational closure operational marking boundaries interacting systems. focusing conception emerges

exact_dup

52902745

10.1016/j.crhy.2009.05.007

International audienceCarbon nanotubes and semiconductor nanowires have been thoroughly studied for the future replacement of silicon-based com- plementary metal oxide semiconductor (CMOS) devices and circuits. However, the organisation of these nanomaterials in dense transistor arrays, where each device is capable of delivering drive currents comparable with those of their silicon counterparts is still a big challenge. Here, we present a novel approach to the organisation of carbon nanotubes and semiconductor nanowires, based on the use of porous lateral alumina templates obtained by the controlled anodic oxidation of aluminium thin films. We discuss the growth of nanomaterials inside the pores of such templates and show the feasibility of our approach. Our first results point to further work on controlling the synthesis of catalyst nanoparticles at the bottom of the pores, these particles being necessary to nucleate and sustain the growth of carbon nanotubes or semiconductor nanowires

Organisation of carbon nanotubes and semiconductor nanowires using lateral alumina templates

organisation of carbon nanotubes and semiconductor nanowires using lateral alumina templates

audiencecarbon nanotubes semiconductor nanowires thoroughly replacement silicon plementary oxide semiconductor cmos devices circuits. organisation nanomaterials dense transistor arrays capable delivering drive currents comparable silicon counterparts challenge. organisation nanotubes semiconductor nanowires porous lateral alumina templates anodic oxidation aluminium films. nanomaterials pores templates feasibility approach. controlling catalyst nanoparticles pores nucleate sustain nanotubes semiconductor nanowires

exact_dup

52907334

10.1088/1742-6596/190/1/012194

International audienceThe effect of ionizing radiation on glasses in the system SiO2-CaO-Na2O-Fe2O3 is investigated as a function of iron concentration or / and irradiation dose by a pre-edge analysis at the iron K-edge. While reduction phenomenon is clearly observed for large irradiation doses (5 C), the effect of irradiation for intermediate doses is more challenging to interpret. Comparison between X-ray absorption measurements, colorimetry results and Electron Paramagnetic Resonance measurements suggest that iron environment may be modified without the ions being reduced

Oxidation state variation under beta-irradiation in an iron-bearing soda lime glass system

oxidation state variation under beta-irradiation in an iron-bearing soda lime glass system

audiencethe ionizing glasses iron irradiation iron edge. phenomenon irradiation doses irradiation doses challenging interpret. colorimetry paramagnetic iron

exact_dup

53011699

10.1016/j.datak.2011.01.003

International audienceOne of the more tedious and complex tasks during the specification of conceptual schemas (CSs) is modeling the operations that define the system behavior. This paper aims to simplify this task by providing a method that automatically generates a set of basic operations that complement the static aspects of the CS and suffice to perform all typical life-cycle create/update/delete changes on the population of the elements of the CS. Our method guarantees that the generated operations are executable, i.e. their executions produce a consistent state wrt the most typical structural constraints that can be defined in CSs (e.g. multiplicity constraints). In particular, our method takes as input a CS expressed as a Unified Modeling Language (UML) class diagram (optionally defined using a profile to enrich the specification of associations) and generates an extended version of the CS that includes all necessary operations to start operating the system. If desired, these basic operations can be later used as building blocks for creating more complex ones. We show the formalization and implementation of our method by means of model-to-model transformations. Our approach is particularly relevant in the context of Model Driven Development approaches

Generating operation specifications from UML class diagrams: A model transformation approach

generating operation specifications from uml class diagrams: a model transformation approach

audienceone tedious tasks specification conceptual schemas operations behavior. aims simplify automatically generates operations complement suffice create update delete guarantees operations executable i.e. executions e.g. multiplicity unified optionally enrich specification associations generates operations operating system. desired operations blocks creating ones. formalization transformations.

exact_dup

53179174

10.1016/j.jorganchem.2014.07.012

We have synthesized some palladacyclopentadienyl complexes bearing 2,6-dimethylbenzo-, 2- tosylaceto- and t-butyl-isocyanides (DIC, TOSMIC and TIC, respectively) as spectator ligands. The oxidative addition of I2 to the DIC derivatives yielded complexes bearing iodine, the butadienyl fragment s-coordinated, and the isocyanides in mutual trans position as final species. On the basis of a kinetic study carried out by means of UVevis and 1H NMR techniques we have proposed a plausible mechanism which is in accord with a computational investigation done by other authors on similar compounds and confirmed by a computational approach we have performed. The proposed mechanism suggests the formation of a Pd(IV) octahedral intermediate complex bearing two iodines in meridional position. The latter yields another intermediate complex bearing iodine, the open butadienyl fragment s-coordinated, and the isocyanides cis to each other which eventually isomerizes to the final trans product. The reaction rates related to the formation of the cis derivatives (k1) and to the isomerization process k'1 were determined as refined parameters of the non linear regression analysis of the monoexponential rela- tionship which is a function of the UVevis spectral changes and time

Attack of molecular iodine to novel palladacyclopentadienyl complexes bearing isocyanides as spectator ligands. A computational and mechanistic study

attack of molecular iodine to novel palladacyclopentadienyl complexes bearing isocyanides as spectator ligands. a computational and mechanistic study

synthesized palladacyclopentadienyl complexes bearing dimethylbenzo tosylaceto butyl isocyanides tosmic spectator ligands. oxidative derivatives yielded complexes bearing iodine butadienyl fragment coordinated isocyanides mutual species. uvevis plausible accord confirmed performed. octahedral bearing iodines meridional position. bearing iodine butadienyl fragment coordinated isocyanides eventually isomerizes product. derivatives isomerization refined monoexponential rela tionship uvevis

exact_dup

53182400

10.1016/j.najef.2015.04.002

Probably, one test of the stability of the banking system is to evaluate how risky assets are distributed across banks’ portfolios and the implications for the contagion via interbank relations. This paper explores theoretically a bank sector with risks concentration and the functioning of interbank markets. It employs a simple model where banks are exposed to both credit and liquidity risk that suddenly correlate over the business cycle. We show that risk concentration makes interbank market breakdowns more likely and welfare monotonically decreases in risk concentration

Does the bank risk concentration freeze the interbank system?

does the bank risk concentration freeze the interbank system?

probably banking risky assets banks’ portfolios contagion interbank relations. explores theoretically bank risks functioning interbank markets. employs banks exposed credit liquidity suddenly correlate cycle. interbank breakdowns welfare monotonically

exact_dup

53302247

10.1097/SLA.0000000000001405

Objectives: We sought to analyze the collected worldwide experience with use of snorkel/chimney endovascular aneurysm repair (EVAR) for complex abdominal aneurysm treatment. Background: EVAR has largely replaced open surgery worldwide for anatomically suitable aortic aneurysms. Lack of availability of fenestrated and branched devices has encouraged an alternative strategy utilizing parallel or snorkel/chimney grafts (ch-EVAR). Methods: Clinical and radiographic information was retrospectively reviewed and analyzed on 517 patients treated by ch-EVAR from 2008 from 2014 by prearranged defined and documented protocols. Results: A total of 119 patients in US centers and 398 in European centers were treated during the study period. US centers preferentially used Zenith stent-grafts (54.2%) and European centers Endurant stent-grafts (62.2%) for the main body component. Overall 898 chimney grafts (49.2% balloon expandable, 39.6% self-expanding covered stents, and 11.2% balloon expandable bare metal stents) were placed in 692 renal arteries, 156 superior mesenteric arteries (SMA), and 50 celiac arteries. At a mean follow-up of 17.1 months (range: 1-70 months), primary patency was 94%, with secondary patency of 95.3%. Overall survival of patients in this high-risk cohort for open repair at latest follow-up was 79%. Conclusions: This global experience represents the largest series in the ch-EVAR literature and demonstrates comparable outcomes to those in published reports of branched/fenestrated devices, suggesting the appropriateness of broader applicability and the need for continued careful surveillance. These results support ch-EVAR as a valid off-the-shelf and immediately available alternative in the treatment of complex abdominal EVAR and provide impetus for the standardization of these techniques in the future

Collected world experience about the performance of the snorkel/chimney endovascular technique in the treatment of complex aortic pathologies: The PERICLES registry

collected world experience about the performance of the snorkel/chimney endovascular technique in the treatment of complex aortic pathologies: the pericles registry

objectives sought analyze worldwide snorkel chimney endovascular aneurysm repair evar abdominal aneurysm treatment. evar largely replaced worldwide anatomically aortic aneurysms. availability fenestrated branched devices encouraged utilizing snorkel chimney grafts evar radiographic retrospectively reviewed evar prearranged documented protocols. centers centers period. centers preferentially zenith stent grafts centers endurant stent grafts component. chimney grafts balloon expandable expanding covered stents balloon expandable bare stents placed arteries superior mesenteric arteries celiac arteries. patency patency cohort repair latest evar demonstrates comparable branched fenestrated devices appropriateness broader applicability continued careful surveillance. evar valid shelf immediately abdominal evar impetus standardization

exact_dup

54037502

10.1016/j.quascirev.2012.07.025

International audienceTwo well-dated ca Holocene-long sedimentary sequences from deepest parts of Lake Bourget provide new insights onto the evolution of erosion patterns at a regional scale in NW European Alps. The combination of high resolution geochemistry e XRF core scanning, calibrated by 150 punctual measurements e and isotope geochemistry ( 3Nd) of the terrigenous fraction permitted the reconstruction not only of the intensity, but also the type (physical erosion vs. chemical weathering) and the location (Prealpine massifs vs. High Crystalline massifs) of dominant erosion processes. Those data point the persistency of weak erosion fluxes from 9600 to 5500 cal. BP due both to a dry climate and the growing sheltering effect of soils that rapidly progressed between 9600 and 8000 cal. BP. Soils then reached a steady state before being destabilised around 4400 cal. BP, probably in response to human impact. The human impact then reached a sufficient intensity to change erosion patterns at a regional scale, but did not result in a significant increase of the regional terrigenous flux. The following enhancement of erosion processes occurred around 2700 cal. BP. It was first paced by changing climatic conditions, but probably reinforced by human impact during Late Iron Age e Antiquity period. Over the long-term trend, the Lake Bourget record pinpoints an evolution of paleohydrological conditions in the Alps dominated by dry conditions from 9500 to 4400 cal. BP and a subsequent drift toward wetter conditions that culminated during the so-called Little Ice Age (ca 1350e1900 AD). In such a context the current dry conditions in European Alps appear out-of-trend. At high resolution, 17 periods of enhanced hydrological activity highlight the rapid climatic changes that are typical of the Holocene

Lake Bourget regional erosion patterns reconstruction reveals Holocene NW European Alps soil evolution and paleohydrology

lake bourget regional erosion patterns reconstruction reveals holocene nw european alps soil evolution and paleohydrology

audiencetwo dated holocene sedimentary deepest lake bourget insights erosion alps. geochemistry scanning calibrated punctual isotope geochemistry terrigenous permitted reconstruction erosion weathering prealpine massifs crystalline massifs erosion processes. persistency erosion fluxes cal. growing sheltering soils rapidly progressed cal. soils reached steady destabilised cal. probably impact. reached erosion terrigenous flux. enhancement erosion occurred cal. paced changing climatic probably reinforced iron antiquity period. lake bourget record pinpoints paleohydrological alps dominated cal. drift toward wetter culminated alps trend. hydrological highlight climatic holocene

exact_dup

54823443

10.1075/ill.10.06nob

International audienceThis paper proposes a theoretical, methodological and descriptive framework for combining a gestural-mimetic theory of the sign with the principle of arbitrariness. First, it draws attention to the history of the question, discusses its theoretical core and presents a method to analyse the relationship between the differential system of phono-articulatory signifiers and the differential system of logical-semantic signifieds. In section 2, this method is tested on the Italian grammatical monosyllables, focusing on a complete description of the words formed from one phoneme (‘monophonemes’), of the words distinguishing grammatical persons and of the adverbial pairs. The main result is that phono-articulatory oppositions (such as [open : closed] and [front : back]) can be systematically described as images of logical-semantic oppositions (such as {complex : simple} and {positive : negative}, respectively). In section 3, a number of conclusions are drawn, particularly about the difference between linguistic ‘values’ and psychological ‘concepts’

Words in the mirror : Analysing the sensorimotor interface between phonetics and semantics in Italian

words in the mirror : analysing the sensorimotor interface between phonetics and semantics in italian

audiencethis proposes methodological descriptive combining gestural mimetic arbitrariness. draws discusses presents analyse phono articulatory signifiers logical semantic signifieds. italian grammatical monosyllables focusing phoneme ‘monophonemes’ distinguishing grammatical persons adverbial pairs. phono articulatory oppositions front systematically logical semantic oppositions drawn linguistic ‘values’ psychological ‘concepts’

exact_dup

55715661

10.1080/00268976.2016.1153742

The theory of maximum probability domains (MPDs) is formulated for the Hubbard model in terms of projection operators and generating functions for both exact eigenstates as well as Slater determinants. A fast MPD analysis procedure is proposed, which is subsequently used to analyse numerical results for the Hubbard model. It is shown that the essential physics behind the considered Hubbard models can be exposed using MPDs. Furthermore, the MPDs appear to be in line with what is expected from Valence Bond (VB) Theory-based knowledge

Maximum probability domains for Hubbard models

maximum probability domains for hubbard models

mpds formulated hubbard projection generating eigenstates slater determinants. subsequently analyse hubbard model. behind hubbard exposed mpds. mpds valence bond

exact_dup

56717677

10.1016/j.specom.2010.02.008

International audienceOne key aspect of face-to-face communication concerns the differences that may exist between speakers' native regional accents. This paper focuses on the characterization of regional phonological variation in a conversational setting. A new, interactive task was designed in which 12 pairs of participants engaged in a collaborative game leading them to produce a number of purpose-built names. In each game, the participants were native speakers of Southern French and Northern French, respectively. How the names were produced by each of the two participants was automatically determined from the recordings using ASR techniques and a pre-established set of possible regional variants along five phonolo-gical dimensions. A naive Bayes classifier was then applied to these phonetic forms, with a view to differentiating the speakers' native regional accents. The results showed that native regional accent was correctly recognized for 79% of the speakers. These results also revealed or confirmed the existence of accent-dependent differences in how segments are phonetically realized, such as the affrication of /d/ in /di/ sequences. Our data allow us to better characterize the phonological and phonetic patterns associated with regional varieties of French on a large scale and in a natural, interactional situation

Automatic recognition of regional phonological variation in conversational interaction

automatic recognition of regional phonological variation in conversational interaction

audienceone aspect concerns speakers native accents. focuses phonological conversational setting. interactive engaged collaborative game built names. game native speakers southern french northern french respectively. names automatically recordings variants phonolo gical dimensions. naive bayes classifier phonetic differentiating speakers native accents. native accent correctly recognized speakers. confirmed accent segments phonetically realized affrication sequences. characterize phonological phonetic varieties french interactional

exact_dup

59035999

10.1016/S0013-7944(98)00104-0

Simplified method to approximately calculate the stress intensity factor of a circumferential crack in a thin-walled cylinder with ends subjected to axisymmetric radial and bending loads was developed, based on the theory of cylindrical shell and method similar to Rice and Levy’s line spring method. The effects of cylinder length and crack location on the value can be evaluated by the method. The numerical results for the problem with the ends subjected to a pair of axisymmetric bending loads showed the necessity to consider the effects of cylinder length and crack location on the stress intensity factor for the problem. (100 words

Stress Intensity Factor of an Arbitrarily Located Circumferential Crack in a Thin-Walled Cylinder with Axisymmetrically Loaded Ends

stress intensity factor of an arbitrarily located circumferential crack in a thin-walled cylinder with axisymmetrically loaded ends

simplified circumferential crack walled cylinder ends subjected axisymmetric bending loads cylindrical rice levy’s spring method. cylinder crack method. ends subjected axisymmetric bending loads necessity cylinder crack problem.

exact_dup

59036793

10.1103/PhysRevLett.102.127205

High magnetic field ^<63,65>Cu NMR spectra were used to determine the local spin polarization in the 1/3 magnetization plateau of azurite, Cu_3 (CO_3)_2(OH)_2, which is a model system for the distorted diamond antiferromagnetic spin-1/2 chain. The spin part of the hyperfine field of the Cu2 (dimer) sites is found to be field independent, negative and strongly anisotropic, corresponding to ~10% of fully polarized spin in a d orbital. This is close to the expected configuration of the quantum plateau, where a singlet state is stabilized on the dimer. However, the observed nonzero spin polarization points to some triplet admixture, induced by strong asymmetry of the diamond bonds J_1 and J_3

Spin Configuration in the 1/3 Magnetization Plateau of Azurite Determined by NMR

spin configuration in the 1/3 magnetization plateau of azurite determined by nmr

magnetization plateau azurite distorted diamond antiferromagnetic chain. hyperfine dimer anisotropic polarized orbital. plateau singlet stabilized dimer. nonzero triplet admixture asymmetry diamond bonds

exact_dup