Polytetrafluoroethylene can be considered as a model for calorimetric studies of complex systems with thermodynamics transitions at ambient temperature. This polymer exhibits two phase transitions of different nature at 292 K and 303 K. We show that sensitive accalorimetry measurements allow us to study the thermodynamic behaviour of polytetrafluoroethylene when it is brought out of thermodynam...

P. Xu,1 Y. Yang,1,2 S. D. Barber,1 M. L. Ackerman,1 J. K. Schoelz,1 Igor A. Kornev,3 Salvador Barraza-Lopez,1 L. Bellaiche,1 and P. M. Thibado1,* 1Department of Physics, The University of Arkansas, Fayetteville, Arkansas 72701, USA 2Physics Department, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China 3Laboratoire Structures, Proprietes et Modelisation des Solides, Ecole...

Throughout the world, a huge effort is engaged in multimedia activities for educational products. This is partictdarly true in sciences where phenomenas are observed, explained and used. Thus, multimedia through animation and interactivity proves all its potential. This paper describes the concept of a virtual lab developed at the LEG EPFL (Electronics Laboratory of the Swiss Federal Institute ...

This paper investigates the efficiency of Support Vector Machines for ozone peak and air pollution forecasting. A specific methodology adapted to the data has been proposed. The method is based on regression estimation of the ozone concentration for a given day. Then for the classification problem (deciding whether that day is polluted or not), the regression value is stacked. Model selection p...

We manufactured pulsed illuminators emitting in the far infrared for the Planck-HFI bolometric instrument ground calibrations. Specific measurements have been conducted on these light sources, based on Carbon fibers, to understand and predict their properties. We present a modelisation of the temperature dependence of the thermal conductivity and the calorific capacitance of the fibers. A compa...

We propose to model the text classification process as a sequential decision process. In this process, an agent learns to classify documents into topics while reading the document sentences sequentially and learns to stop as soon as enough information was read for deciding. The proposed algorithm is based on a modelisation of Text Classification as a Markov Decision Process and learns by using ...

Darts cet article, noas commencons par pr6senter de mani6re tr6s succincte le projet. Nous tentons ensulte de demontrer les iimites d'un sysl/:me interlingua. Nous montrons d'abord qu'une collaboration trds ~troite lors du dtveloppement des difftrentes grammaires nous permet gtntralement d'obtenir une m~me reprtsentation stmantique darts les deux langues, ce qui rend le transfer plus efficace e...