Search results for "Pattern"

showing 10 items of 4203 documents

ITKA111 Oliosuuntautunut analyysi ja suunnittelu

2009

requirements analysisinformation systems designuse casesohjelmistovaatimuksetohjelmistoarkkitehtuurioliokeskeisyyskäyttötapauksetsoftware requirementsobject orientationvaatimusanalyysitietojärjestelmien suunnittelusuunnittelumallitdesign patterns
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Dynamics of hydrofracturing and permeability evolution in layered reservoirs

2015

International audience; A coupled hydro-mechanical model is presented to model fluid driven fracturing in layered porous rocks. In the model the solid elastic continuum is described by a discrete element approach coupled with a fluid continuum grid that is used to solve Darcy based pressure diffusion. The model assumes poro-elasto-plastic effects and yields real time dynamic aspects of the fracturing and effective stress evolution under the influence of excess fluid pressure gradients. We show that the formation and propagation of hydrofractures are sensitive to mechanical and tectonic conditions of the system. In cases where elevated fluid pressure is the sole driving agent in a stable tec…

reservoir[SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]Materials Science (miscellaneous)Effective stressfluid pressureBiophysicsGeneral Physics and AstronomyPattern formation[SDU.STU]Sciences of the Universe [physics]/Earth Sciencesreservoirsstresshydrofracturesfluid pressure4Ultimate tensile strength[PHYS.MECA.SOLID]Physics [physics]/Mechanics [physics]/Solid mechanics [physics.class-ph][PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph]Physical and Theoretical ChemistryPorosityMathematical PhysicsCauchy stress tensorPhysicsMechanicssimulationreservoirs2lcsh:QC1-999TectonicsPermeability (earth sciences)Keywords: hydrofractures1simulation3Relative permeabilityhydrofractureGeologystress5lcsh:Physics
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Understanding the health care pattern of homeless children through their residential journey

2021

En Île-de-France, l’hôtel social est souvent mobilisé par les associations pour héberger des familles, principalement migrantes et accompagnées d’enfants de moins de 6 ans. À cet âge, l’enfant nécessite un suivi de soins régulier auprès des professionnels pédiatriques. Nous supposons que ce suivi est dépendant de la mobilité résidentielle inhérente au système d’hébergement hôtelier. Cet article a pour objectif de reconstituer le parcours résidentiel des familles et le parcours de soins de leurs enfants et de saisir comment ces derniers s’influencent. La démonstration repose sur 18 entretiens biographiques spatialisés réalisés entre 2013 et 2016 auprès des familles sans logement hébergées en…

residential instability[SHS.SOCIO]Humanities and Social Sciences/Sociologyimmigrants[SHS.SOCIO] Humanities and Social Sciences/Sociologyhealthcare patternfamilles sans logementmigrantssanté infantileÎle-de-FranceParis Regionhomeless familiesinstabilité résidentielleparcours de soinschild healthComputingMilieux_MISCELLANEOUSPopulations vulnérables
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Optimal Resource Allocation in Multi-Hop Networks: Contention vs. Scheduling

2014

CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) is actually the most used method in ad-hoc networks for transmitting on a contending medium, even if it shows poor performance in presence of hidden nodes. To increase performance, we propose an algorithm that combines CSMA and TDMA (Time Division Multiple Access) approaches. The adopted solution consists of grouping contending nodes in non-interfering subsets and granting a different numbers of time slots to different groups, while using the CSMA to manage medium access among nodes belonging to the same subset. An optimization procedure to assign the time slots to each subset of nodes and to find an equilibrium between contention …

resource allocation; multi hop neworksSettore ING-INF/03 - TelecomunicazioniComputer sciencebusiness.industryDistributed computingMulti-frequency time division multiple accessComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSTime division multiple accessresource allocationComputer Science Applications1707 Computer Vision and Pattern Recognitionmulti hop neworksHop (networking)Carrier-sense multiple accessScheduling (computing)resource allocation multi hop neworksComputer Networks and CommunicationSettore ING-INF/04 - AutomaticaControl and Systems EngineeringChannel access methodbusinessInformation SystemsComputer network
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Investigation of a Gravel-Bed River’s Pattern Changes: Insights from Satellite Images

2021

Changes in river pattern have been documented in the literature. The recognition of islands and vegetated patches, which is indicative of the evolution processes, requires simultaneous information at different points and at different times and field studies are still difficult and scarce. The present work, focusing the attention on a gravel-bed river, explores the possibility to conduct a first-step pattern changes analysis by identifying the evolution of the morphological features and taking information of islands and vegetated patches from satellite images easily available from Google Earth. The study is conducted by combining the information taken from both the satellite images and the f…

river pattern010504 meteorology & atmospheric sciencesriverFlow (psychology)Flux010502 geochemistry & geophysicslcsh:Technology01 natural sciencesDeposition (geology)Settore ICAR/01 - Idraulicalcsh:ChemistryGeneral Materials Sciencelcsh:QH301-705.5Instrumentation0105 earth and related environmental sciencesFluid Flow and Transfer Processeslcsh:TProcess Chemistry and TechnologyGeneral EngineeringSedimentvegetated patcheVegetationpredictionlcsh:QC1-999Field (geography)Computer Science Applicationsimagesmonitoringlcsh:Biology (General)lcsh:QD1-999lcsh:TA1-2040morphological evolutionSatellitePhysical geographylcsh:Engineering (General). Civil engineering (General)Sediment transportlcsh:PhysicsGeologyApplied Sciences
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Contributions à l’imagerie polarimétrique et à ses applications en vision pour la robotique

2019

Ce mémoire présente le bilan de l'ensemble de mes travaux de recherche effectués de septembre 2006 à juin 2019 au sein de l'équipe Creusotine du laboratoire Le2i devenue équipe Vibot ERL CNRS 6000 depuis janvier 2018. Les principales activités de recherche que j'ai menées au cours de ces 10 dernières années autour de l'imagerie polarimétrique, de la vision omnidirectionnelle et de leurs applications en vision pour la robotique seront particulièrement détaillées dans ce document. Elles seront présentées selon deux grandes parties : la première concernera plutôt l'aspect mise en œuvre et calibrage des caméras et la seconde se concentrera sur les applications potentielles en vision pour la rob…

robotics[INFO.INFO-CV] Computer Science [cs]/Computer Vision and Pattern Recognition [cs.CV][INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing[INFO.INFO-TI] Computer Science [cs]/Image Processing [eess.IV][INFO.INFO-TS] Computer Science [cs]/Signal and Image Processing[INFO.INFO-TI]Computer Science [cs]/Image Processing [eess.IV][INFO.INFO-CV]Computer Science [cs]/Computer Vision and Pattern Recognition [cs.CV]Polarimetric imaging systemcomputer visionImagerie polarimétriquevision pour la robotique
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La formation du comportement de plainte chez le consommateur: recherche exploratoire chez des usagers de restaurants

2008

La investigación que se presenta aborda el proceso de formación del comportamiento de queja del consumidor. El objetivo general es profundizar en la naturaleza de este tipo de respuesta a la insatisfacción, describiendo su formación a partir de la contribución de un conjunto de variables investigadas en la literatura. Partiendo de que el comportamiento de queja agrupa tres tipos de respuestas (de queja, a terceras partes y privadas), analizamos el efecto que tiene el nivel de insatisfacción, la probabilidad de éxito de la queja, la importancia de la situación y las actitudes hacia la queja. Las relaciones causales estudiadas entre estos determinantes y los comportamientos de queja han permi…

réponses à l´insatisfactionrespostas à insatisfaçãoSatisfaction/insatisfactionSatisfacción/insatisfaccióncomportamiento de quejarestaurantscomportamento de queixaresponses to being unsatisfiedSatisfaction/being unsatisfiedrestaurantesrestaurantcomplaint patternSatisfação/insatisfaçãorespuestas a la insatisfaccióncomportement de plainte
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Contributions à l'analyse et à l'interprétation des images : Extraction et représentation de caractéristiques

2016

Ce mémoire, rédigé en vue de l'obtention de l'Habilitation à Diriger des Recherches (HDR), offre un aperçu des travaux de recherche et d’encadrement que j’ai pu mener depuis l'obtention de mon doctorat. Il montre la diversité des champs d’application et de recherche (en vision et en imagerie médicale) que j’ai pu couvrir , ainsi que mon implication dans l’encadrement doctoral.Mes activités de recherche se divisent en deux grandes parties. D'une part, l'analyse de scènes dynamiques, à savoir la détection de regions d'intérêt dans des séquences d'images, pour réduire la taile des données à traiter, et la détection et le suivi d'objets mobiles à l'aide de caméras de diverses natures (perspecti…

rétinopathie diabétique[INFO.INFO-CV] Computer Science [cs]/Computer Vision and Pattern Recognition [cs.CV][INFO.INFO-CV]Computer Science [cs]/Computer Vision and Pattern Recognition [cs.CV]imagerie OCTObject tracking[ INFO.INFO-CV ] Computer Science [cs]/Computer Vision and Pattern Recognition [cs.CV]Visual saliency detectionAttention visuellesuivi d'objetsDiabetic retinopathy screeningOCT retinal imaging
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Visual saliency by keypoints distribution analysis

2011

In this paper we introduce a new method for Visual Saliency detection. The goal of our method is to emphasize regions that show rare visual aspects in comparison with those showing frequent ones. We propose a bottom up approach that performs a new technique based on low level image features (texture) analysis. More precisely, we use SIFT Density Maps (SDM), to study the distribution of keypoints into the image with different scales of observation, and its relationship with real fixation points. The hypothesis is that the image regions that show a larger distance from the mode (most frequent value) of the keypoints distribution over all the image are the same that better capture our visual a…

saliency visual attentiontexture SIFTComputer sciencebusiness.industryFixation (visual)ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONVisual attentionScale-invariant feature transformPattern recognitionComputer visionTop-down and bottom-up designArtificial intelligencebusinessVisual saliency
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Indicadores de actividad científica en investigadores singulares: perfil bibliométrico de Eduardo Primo Yúfera, expresidente del CSIC

2012

[EN] Eduardo Primo Yúfera was the founder of the Institute of Agrochemicals and Food Technology (IATA-CSIC) and was its director until being appointed president of the Spanish National Research Council. He is considered both patron and promoter of the fields of food science and technology and chemical ecology in Spain, as well as pioneer of the innovation system model (R+D+i). Throughout his long research career,which lasted 65 years, he published 291 scientifi c papers, with an average of 4.48 papers per year. Of these, 89.3 % were in collaboration with others: a total of 161 different coauthors. His efforts to disseminate science led him to create the Revista de Agroquímica y Tecnología d…

scientific productivitybiographyScientiometricsLibrary scienceLibrary and Information SciencesBibliography. Library science. Information resourcesbiografíaimpacto científicoPolitical scienceSubject areasScientific activityCienciometríaBiografíaspatrones de colaboraciónscientific impactScientific productionlcsh:Zlcsh:Bibliography. Library science. Information resourcesResearch careerResearch councilproductividad científicabibliometríabibliometricsCitationEduardo Primo Yúferacollaboration patternsZRevista Española de Documentación Científica
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