Search results for " graph"
showing 10 items of 1277 documents
A multispecies approach for modeling the ecological impact of urban development using landscape graphs
2013
International audience; Managing urban sprawl is become a major concern in the field of landscape ecology, since the land use changes involved by urban development may affect the ability of wildlife species to move across the landscape. In order to compare the ecological impact of several urban patterns, we aim at combining two complementary approaches: 1) Simulations of residential development from an initial land use map, using morphological rules of urban development (i.e. fractal vs non fractal) and accessibility constraints; 2) Models of ecological networks applied to a given natural habitat, using a landscape graphs-based approach. As landscape graphs are built according to the moving…
Quand et comment utiliser des graphes génétiques pour analyser le flux génétique dans des paysages hétérogènes ?
2019
La connectivité écologique des habitats dépend de la topologie du réseau formé par les populations qui les occupent. Les graphes génétiques permettent i) d’identifier les chemins de dispersion directs en révélant cette topologie et ii) de quantifier la résistance des éléments paysagers à la dispersion. Nous avons étudié comment l’équilibre migration-dérive affecte les choix de construction de ces graphes et les inférences qui en découlent. Nous avons simulé le flux génétique entre 50 populations dans différents paysages et construit des graphes pondérés avec plusieurs distances génétiques et élagués selon différents critères. Nous avons ensuite comparé la capacité de ces graphes à i) représ…
Close-Range Photogrammetric Tools for Epigraphic Surveys
2016
In this article, we present a method to carry out a computerized epigraphic survey of historic stones and their engraved epigraphy. In fact, the preservation of archaeological objects has always been an issue of concern for the research community. On the one hand, the fragility of the objects limits their study. On the other hand, such objects are housed in museums, libraries, and institutions worldwide, locations that significantly limit their accessibility. Different survey methods have been carried out in these attempts to overcome the aforementioned limitations. Among them, the MicMac open source software was used in this work to survey and process the dense correlation of the hieroglyp…
Contextualization of archaeological information using augmented photospheres, viewed with head-mounted displays.
2019
Photospheres, or 360°
Lire le temps au travers des lignes de nos villes & lire les lignes de nos villes au travers du temps. Étude de structures et de morphogenèses viaire…
2019
International audience; Les villes organiques (en opposition aux villes planifiées) se construisent sur le temps long, par ajouts successifs, s'organisant depuis des traces anciennes pour créer la trame actuelle. Des trois éléments morphologiques qui les composent (bâtis, parcelles, voierie), le réseau viaire est celui le moins susceptible de subir des modifications brusques au cours du temps. Il est ajusté par touches ponctuelles, ou bien s'étend sur le paysage environnant. Lorsque sa modification se produit à l'échelle globale, dans une ville, l'événement est suffisamment rare pour acquérir une renommée mondiale, comme celle d'Haussmann à Paris ou de Cerdà à Barcelone au XIXe siècle. Cett…
Le trait 68 : insubordination graphique et contestations politiques : 1966-1977
2018
International audience
Muréna en Amérique, censure et bande dessinée historiques aux Etats-Unis
2015
The study begins with an analysis of the reasons why the images of the American version of Murena are censored, with modest veils being thrown upon any instance of nudity while this version rather emphasizes the violence of the graphic novel in its translation and adaptation choices. That paradoxical attitude is discussed in the context of the ambiguities developed in the US culture as regards the representation of nudity being a reminder of the human species’ animal dimension in a society still fraught with puritanical assumptions. Although those ambiguous choices may be ascribed to the publisher’s wish to adapt Murena to the young readers regarded as their main target, they may also repre…
Extension des méthodes de géométrie algorithmique aux structures fractales
2013
Defining shapes by iteration allows us to generate new structures with specific properties (roughness,lacunarity), which cannot be achieved with classic modelling.For developing an iterative modeller to design fractals described by a BCIFS, we developed a set oftools and algorithms that permits one to evaluate, to characterize and to analyse different geometricproperties (localisation, convex hull, volume, fractal dimension) of fractals. We identified properties ofstandard CAD operations (intersection, union, offset, . . . ) allowing us to approximate them for fractalsand also to optimize these approximation algorithms.In some cases, it is possible to construct a CIFS with generalised HUTCH…
ScaleSem : model checking and semantic web
2012
The increasing development of networks and especially the Internet has greatly expanded the gap between heterogeneous information systems. In a review of studies of interoperability of heterogeneous information systems, we find that all the work in this area tends to be in solving the problems of semantic heterogeneity. The W3C (World Wide Web Consortium) standards proposed to represent the semantic ontology. Ontology is becoming an indispensable support for interoperability of information systems, and in particular the semantics. The structure of the ontology is a combination of concepts, properties and relations. This combination is also called a semantic graph. Several languages have bee…
Didáctica de las ciencias experimentales y sociales
2005
RESUMEN: Este artículo presenta un estudio sobre la influencia del uso didáctico y científico de las representaciones gráficas cartesianas en la ejecución que hacen los estudiantes de las tareas propias de tres niveles de comprensión gráfica. Los resultados muestran que el uso didáctico instrumental influye negativamente en la ejecución de las tareas de los niveles de comprensión explícita y conceptual de los estudiantes con formación en ciencias y en el nivel de comprensión implícita de los estudiantes sin esta formación. También, muestran que el uso científico experimental influye positivamente en el nivel de comprensión implícita de los estudiantes con formación científica. ABSTARCT: Thi…