Concept

Extensivité et intensivité (physique)

Publications associées (274)

Quantum and Thermal Transitions Out of the Supersolid Phase of a 2D Quantum Antiferromagnet

We investigate the thermodynamic properties of a field-induced supersolid phase in a 2D quantum antiferromagnet model. Using quantum Monte Carlo simulations, a very rich phase diagram is mapped out in the temperature—magnetic-field plane, with an extended ...

2007

Efficient estimators for quantum instanton evaluation of the kinetic isotope effects: Application to the intramolecular hydrogen transfer in pentadiene

Jiri Vanicek

The quantum instanton approximation is used to compute kinetic isotope effects for intramolecular hydrogen transfer in cis-1,3-pentadiene. Due to the importance of skeleton motions, this system with 13 atoms is a simple prototype for hydrogen transfer in e ...

2007

Current status of AlInN layers lattice-matched to GaN for photonics and electronics

Nicolas Grandjean, Jean-François Carlin, Raphaël Butté, Eric Feltin, Gabriel Christmann, Julien Dorsaz, Antonino Francesco Castiglia, Sylvain Nicolay, Marcel Py, Marcus Gonschorek, Mauro Mosca, Dobri Simeonov

We report on the current properties of Al1-x InxN (x approximate to 0.18) layers lattice- matched ( LM) to GaN and their specific use to realize nearly strain- free structures for photonic and electronic applications. Following a literature survey of the g ...

2007

Energy conversion processes for the use of geothermal heat - Final report

François Maréchal, Luc Girardin

The study deals with theoretical as well as with practical aspects of the conversion of geothermal heat to electricity. The report is divided into three parts: • Part I: General study • Part II: Practical experience: planning & operation of geothermal powe ...

2007

Scalable Asynchronous Incoherent Optical CDMA [invited]

Camille Sophie Brès

We present and review several aspects of incoherent optical code-division multiple access (OCDMA), focusing on the flexible bandwidth allocation and its potential for future optical networks. We briefly present the various OCDMA approaches, coherent and in ...

2007

Biomolecular hydrogels formed and degraded via site-specific enzymatic reactions

Matthias Lütolf, Jeffrey Alan Hubbell, Martin Ehrbar

We present polymeric hydrogel biomaterials that are biomimetic both in their synthesis and degradation. The design of oligopeptide building blocks with dual enzymatic responsiveness allows us to create polymer networks that are formed and functionalized vi ...

2007

Hydration and structure development of ternary binder system as used in self-levelling compounds

Julien Kighelman

Self-levelling flooring compounds (SLC) are applied in thin layers (less than 1cm) to level floors before further finishing cover such as parquet or plastic cover. They are composed of a ternary binder system based on Portland cement (PC), calcium aluminat ...

EPFL2007

Comportement au jeune âge et différé d'un BFUP écrouissant sous les effets thermomécaniques

Aicha Kamen

This thesis is dedicated to study the early age behavior and time dependant as well as the thermo-mechanical response under restraint of a hardening Ultra High Performance Fiber Reinforced Concrete (UHPFRC). The knowledge of the UHPFRC behavior is indispen ...

EPFL2007

Solid freeform fabrication of porous ceramic parts from ceramic powders and preceramic polymers

Thomas Alexandre

This dissertation addresses the development of a Solid Freeform Fabrication process, Selective Laser Pyrolysis, to fabricate three-dimensional porous ceramic preforms from ceramic powders and preceramic polymers. It contributes to a better understanding of ...

EPFL2007

A thermodynamic model for the precipitation of nanostructured copper oxalates

Heinrich Hofmann, Paul Bowen, Jacques Lemaître, Lucica Soare

A thermodynamic model is developed for the precipitation of copper oxalate from aqueous solutions of copper nitrate and sodium oxalate in a small well-mixed batch reactor. This model is then used to explain the discrepancy between experimental pH evolution ...

2006

Graph Chatbot

Chattez avec Graph Search

Posez n’importe quelle question sur les cours, conférences, exercices, recherches, actualités, etc. de l’EPFL ou essayez les exemples de questions ci-dessous.

AVERTISSEMENT : Le chatbot Graph n'est pas programmé pour fournir des réponses explicites ou catégoriques à vos questions. Il transforme plutôt vos questions en demandes API qui sont distribuées aux différents services informatiques officiellement administrés par l'EPFL. Son but est uniquement de collecter et de recommander des références pertinentes à des contenus que vous pouvez explorer pour vous aider à répondre à vos questions.

Connectez-vous pour utiliser Chat avec Graph Search