Composition picturale

La composition picturale est l'organisation des formes à l'intérieur des limites d'une , dans les arts graphiques, de la peinture au dessin, la gravure, la photographie, le cinéma, l'. La composition s'envisage comme pratique et comme réflexion au moment de la réalisation de l'image, ou comme rubrique de l'analyse d'une image existante. On appelle « canevas » ou « schème de composition » l'ensemble des lignes et figures géométriques, visuelles ou effectivement tracées, dans lesquelles s'inscrivent les éléments de l'image. Théories de la composition picturale Définitions La composition picturale acquiert une importance particulière dans l'art européen à partir de la Renaissance, quand la peinture adopte le concept du point de vue. Dans d'autres contextes, on peut considérer que le regard parcourt l'image, sans se préoccuper de la considérer en entier, et la notion de composition n'a pas lieu. C'est le cas par exemple dans certains panneaux

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AR-415: UE L : Art and architecture: constructing the view I

The ability to represent ideas coherently and communicate a projectâs aims effectively is a key skill for every architect. Design, painting, photography, modelling and graphics are essential to the architectural project and become didactic instruments for the development of individual talent.

AR-476: UE U : Cartography

Teaching unit on mapping environmental relations in architecture.

MSE-422: Advanced metallurgy

This course covers the metallurgy, processing and properties of modern high-performance metals and alloys (e.g. advanced steels, Ni-base, Ti-base, High Entropy Alloys etc.). In addition, the principles of computational alloy design as well as approaches for a sustainable metallurgy will be addressed

Arts visuels

Les arts visuels sont les arts qui produisent des objets perçus essentiellement par l'œil. Ils englobent les arts plastiques traditionnels (les anciens beaux-arts dégagés de la notion restrictive d'e

Photographie

vignette|Mère migrante (Migrant Mother), photographie de Dorothea Lange, 1936. thumb|redresse|Dali Atomicus, photographie de Philippe Halsman mettant en scène Salvador Dalí. vignette|Une photographie

Conception de site web

La création et la conception de site web ou web design est la conception de l'interface web : l’architecture interactionnelle, l’organisation des pages, l’arborescence et la navigation dans un site w

Microstructural evolution and mechanical property development with nickel addition in low-carbon weld butt joints

Rui Cao, Cyril Cayron, Roland Logé, Gaojun Mao

Four metal powder flux-cored wires with added nickel (Ni) were designed to systematically investigate how Ni influences the microstructure and toughness in low-carbon bainitic weld metals (WMs). The microstructure was safely predicted by utilizing reasonable welding craft parameters (i.e., appropriate heat input and proper interpass temperature). Microstructural characterization, crystallographic analysis, microhardness mapping, fracture microparameter measurement, and finite element method calculations were all taken into account. This work showed that more martensite transformation occurs with increasing Ni and that the ductile-brittle transition temperature drops with added Ni. The boundaries with low-angle misorientation (i.e., less than 4°) enhance microhardness and the optimal inclusion size is in the range of 0.3–0.45 μm, thus revealing the reasons for the resulting microhardness and toughness variations. In addition, the high-angle grain boundaries in close-packed plane packets effectually prevent cracks. From a practical perspective, 4 wt.% Ni could be the best design for welding wires in the present work. This work confirmed many of the results found in recently published literature. These results provide a reference for the composition design of welding wires and the processing method of WMs.

2018

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An algebraic framework for urgency

Joseph Sifakis

A sub-class of timed automata known as timed automata with deadlines was presented. Parallel composition and other operators were defined according to 'orthogonality' principal, for timed process algebras and hybrid automata. The compositional description methods that are based on 'flexible' composition rules that relax urgency constraints to preserve time reactivity was also studied.

2000

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Indirect-Gap Alxga1-Xas and Its Similarity to Gap

We report on luminescence, transmission and luminescence excitation measurements on indirect-gap AlxGa1-xAs in the composition range 0.42 less than or equal to x less than or equal to 0.86. The phonon coupling strength in transitions of bound excitons is investigated and found to be dependent on AlAs mole fraction and on the chemical species of the binding impurity. We find binding energy values of 35.5 +/- 5.5 meV for x = 0.42 and 50.0 +/- 5.5 meV for x = 0.86. The recombination of indirect-gap free excitons is strongly influenced by a so-called 'camel's back structure' (Delta = 349 meV, delta = 5.5 meV, xi = 0.092 for x = 0.42) within the lowest conduction band near the zone boundary X. The exciton binding energy amounts to 20 +/- 3 meV, much higher than reported recently in literature, and much higher than computable using a simple hydrogen model for the exciton. Temperature-dependent luminescence measurements-in the temperature range 4.2 K less than or equal to T less than or equal to 300 K-yielded a reliable relation for the temperature dependence of the indirect excitonic gap at an AlAs mole fraction of x = 0.42. From temperature-dependent measurements the binding energy of the sulphur donor was evaluated to be 95 +/- 9 meV in Al0.75Ga0.25As, being representative of AlAs-rich material. This value, more than twice that computable from a simple effective-mass model, has to be seen as a further strong hint at a pronounced anisotropy within the lowest conduction band at the X point of the Brillouin zone. Because the band structure data of AlAs and indirect-gap AlxGa1-xAs are very similar to those of the well known binary compound Gap, we consequently use the detailed knowledge on near-gap electronic states in this material to describe our experimental findings.

1995

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