Search results for "paces"
showing 10 items of 496 documents
homogeneous embeddings of SL2(C) modulo a finite sub-group.
2000
L'objet de ce travail est l'étude des variétés algébriques normales complexes munies d'une action algébrique de $SL_{2}$ et qui contiennent $SL_{2}/H$ comme orbite ouverte, $H$ étant un sous-groupe fini de $SL_{2}$.Plus précisément on définit un plongement homogène de $SL_{2}/H$ comme la donnée d'une $SL_{2}$-variété irréductible $X$ (quasi-projective ou non) contenant $SL_{2}/H$ comme orbite ouverte et d'un morphisme $SL_{2}$-équivariant de $SL_{2}$ dans $X$.Les plongements homogènes lisses ainsi que les plongements minimaux (plongements lisses et complets qui ne sont pas des éclatements d'un autre plongement lisse complet) de $SL_{2}/\{Id\}$ et de $SL_{2}/\{\pm Id\}$ ont été déterminés pa…
Hybrid Learning Situation as a Challenge for Design
2016
In the paper, we address the physical learning space and focus on designing enabling settings for learning. New practices emerge from an accelerating context change and a rapid adoption of novel ICT solutions. Educational institutions and professionals strive to implement effective settings and instructional methods in order to facilitate an acquisition of the 21st century skills. Little attention is paid to changes that take place at the level of interpersonal communication, let alone their possible impacts in the long run. As the methods and the settings diversify, and the whole learning landscape turns hybrid, a good fit between the setting and the instructional method is a daily design …
Hyperbolic spaces
2008
Spatiocolorimetric neighborhood hypergraph and Image Processing Applications : Noise Removal and Edge Detection.
2004
In this document, we are interested in image modeling by the means of the hypergraph theory. Our contribution is essentially centered on the determination of the properties resulting from this theory and on the analysis from their adequacy with image problems, particularly edge and noise detection.First, we study the image spatiocolorimetric neighborhood hypergraph representation. Three representations are respectively presented incorporating global properties, local properties and similarity functions. Then, we use the hypergraph properties generated by the representation in order to define the structural models of noise and edge. This enables us to deduce the algorithms of noise suppressi…
Rigenerazione greenbased degli inbetween spaces
2015
Agire sulle aree urbane interstiziali (sovente in quartieri periferici) per rispondere alla domanda di una migliore vivibilità delle città, si configura quale interessante tema di approfondimento alla cui base deve esserci la conoscenza delle situazioni in essere e delle loro refluenze sullo spazio fisico e sociale. Si tratta, infatti, di spazi aperti abbandonati, sottoutilizzati, considerati insicuri ma che hanno, in nuce, le potenzialità di risorse per la rigenerazione fisica, sociale, ambientale e- perché no- economica, non solo dei quartieri ma della città in toto. Gli interstizi urbani- che in gran parte connotano le periferie nate nel dopoguerra, non solo delle metropoli ma anche dell…
Dendrochronologie : potentialités et nouveaux enjeux pour l’archéologie préventive
2019
International audience; La dendrochronologie, méthode de datation qui étudie la variation des largeurs des cernes de croissance des arbres, est sollicitée, en archéologie, pour l’obtention d’une date absolue. Elle nécessite un dialogue incontournable entre les différents acteurs de la discipline pour fiabiliser les acquisitions, voire tout simplement obtenir une date. L’analyse des bois archéologiques ne se limite toutefois pas à la seule datation et constitue le point de départ de nouvelles approches qui permettent de combler des espaces et des champs de recherche encore lacunaire, pour le sud de la France notamment. Dans le contexte des changements climatiques actuels, la dendrochronologi…
Analysis and synthesis with a three-component inferential system : Augmenting the explanatory scope of Conceptual Spaces
2017
The study introduces a model of analysis and synthesis, respective abductive and deductive reasoning, using the three-component inferential system, which is constituted by a perspective-relative augmentation of Gärdenfors’s theory of Conceptual Spaces (CS). A general formulation of Perspective, based on our earlier work, corresponds to prioritization among property dimensions. Instead of assuming one conceptual space as in the CS, a distinction is made between the high-dimensional description of the discourse/domain termed Ontospace, and the two-dimensional perspectival space onto which a Perspectiverelative hierarchical conceptualization is projected, referred to as the Perspectival Space.…
Op art et roman virtuel : correspondances entre Escher et Perec
2012
Op art et roman virtuel : correspondances entre Escher et Perec Les structures mathématiques, la notion de réalité comme « humaine illusion », le défi à l’infini et la structure énigmatique qui donne aux œuvres eschériennes la même structure que celle d’un roman policier permettent d’établir des convergences significatives entre le graveur hollandais et Georges Perec. Dans certaines œuvres de Perec, en effet, il est possible de remarquer des références explicites au graveur bien qu’elles constituent la traduction visuelle de l’angoisse du « retour du semblable », du « retour involontaire au même point ». Mais Perec ne se limite pas seulement à citer Escher, puisque certaines de ses œuvres c…
Semiótica da cidade: corpos, espaços, tecnologias
2015
Resumo:A cidade é feita de espaços, corpos, tecnologias. A semiótica tem estudado há tempos todos estes três fenômenos de significação. Todavia, o estudo semiótico do espaço urbano quase nunca foi articulado pela semiótica dos objetos técnicos, nem pela do corpo. Entrelaçar estes três âmbitos, como este artigo busca fazer, aparece, portanto, como um gesto teórico tão urgente quanto necessário. Nestas páginas analisa-se um velho desenho animado de Walt Disney em que o personagem de Pateta muda radicalmente os próprios programas de ação e paixão, condicionado por estar no espaço urbano, como pedestre ou automobilista. Um ator, dois actantes, e consequentemente, dois espaços de significação di…
Rethinking Learning Design in IT Education During a Pandemic
2021
Maintaining high-quality teaching and learning in the times of a pandemic poses a huge challenge to education systems. To scaffold adequate practices in our courses during the pandemic, more advanced, and fine-grained “learning design” is needed than providing the learning objectives and learning materials of the course and defining the deliverables and assignments. In this paper, we leverage on our experience with putting into practice different learning designs and technologies, in various information technology (IT) contexts and discuss how IT educators can further reflect on the learning design of their courses and scaffold fully remote or blended learning approaches to accommodate thei…