Conservatoire national des arts et métiers

About: Conservatoire national des arts et métiers is a education organization based out in Paris, France. It is known for research contribution in the topics: Population & Orthogonal frequency-division multiplexing. The organization has 3573 authors who have published 7127 publications receiving 141430 citations. The organization is also known as: CNAM & Conservatoire des arts et métiers.

Experimental Investigation on CO2 Post−Combustion Capture by Indirect Thermal Swing Adsorption Using 13X and 5A Zeolites

Abstract: Experimental results of CO2 post-combustion capture for a TSA process including an internal heat-exchanger (indirect heating/cooling) are presented. The comparative experimental study is carried out on 13X and 5A zeolites, with a mixture 90% N2−10% CO2 modeling the flue gas. With 5A zeolite having given the best performances, we tested it with various operating conditions including one with nitrogen purge during desorption. This one showed a good compromise between CO2 capture rate, purity of the desorbate, volumetric productivity, and specific-heat consumption. We obtained a volumetric productivity of 37 kgCO2/m3ads·h and a specific-heat consumption of 6 MJ/kgCO2 at our laboratory scale and 4.5 MJ/kgCO2 for the adiabatic estimate (in the same order of magnitude as those obtained industrially with the reference MEA amine process). These results are promising because our process is not optimized yet and the scale-up on an industrial version involves a reduction in specific-heat consumption.

Lead and Mercury Sensing by Calixarene-Based Fluoroionophores Bearing Two or Four Dansyl Fluorophores

Abstract: A detailed study on the photophysical and complexing properties of calixarenes bearing two and four dansyl derivatives (Calix-DANS2 and Calix-DANS4) in a CH 3 CN/H 2 O mixture (60:40 v/v) is reported. Calix-DANS2 shows a high selectivity towards Hg 2 + over interfering cations (Na + , K + , Ca 2 + , Cu 2 + , Zn 2 + , Cd 2 + and Pb 2 + ) and a sensitivity in the 10 - 7 mol L - 1 concentration range. The complexation of mercury ion induces a strong fluorescence quenching due to a well-defined electron transfer process from the fluorophore to the metal center. Calix-DANS4 exhibits an extremely high affinity for Pb 2 + with a high selectivity over various competing ions. The unprecedented detection limit (4 μg L - 1 ) is fully compatible with the level defined by the World Health Organisation. The affinity of Calix-DANS4 for Pb 2 + can be rationalized by the activation of the inert pair of electrons on Pb 2 + . The number of fluorophores involved in the complexation can be determined from a careful time-resolved fluorescence characterization.

Subjetividade, trabalho e ação

Abstract: Este artigo traz algumas questoes para o debate sobre as relacoes entre trabalho e subjetividade. Nessa perspectiva o trabalho e aquilo que implica, do ponto de vista humano, o fato de trabalhar: gestos, saber-fazer, um engajamento do corpo, a mobilizacao da inteligencia, a capacidade de refletir, de interpretar e de reagir as situacoes; e o poder de sentir, de pensar e de inventar. O real do trabalho sempre se manifesta afetivamente para o sujeito, ai se estabelece uma relacao primordial de sofrimento, experimentada pelo sujeito, corporificada. Trabalhar e preencher a lacuna entre o prescrito e o real. Por isto e que uma parte importante do trabalho efetivo permanece na sombra, nao podendo, entao, ser avaliado. Outra questao abordada e sobre os acordos firmados entre os trabalhadores no seio do coletivo, de uma equipe ou de um oficio, que tem sempre uma vetorizacao dupla: de uma parte, um objetivo de eficacia e de qualidade do trabalho; de outra parte, um objetivo social. E proposta tambem uma discussao entre a teoria psicodinâmica do trabalhar, onde a centralidade do trabalho e um dos seus alicerces e a teoria psicanalitica onde esta questao nao e abordada diretamente.

JAC: A Flexible Solution for Aspect-Oriented Programming in Java

Abstract: This paper presents JAC (Java Aspect Components), a framework for aspect-oriented programming in Java. Unlike language such as AspectJ which are mostly class-based,JAC is object-based and does not require any language extensions to Java. It uses the Javassist class load-time MOP. An aspect program in JAC is a set of aspect objects that can be dynamically deployed and undeployed on top of running application objects. Aspect objects may define three kinds of aspect methods: wrapping methods (that wrap application methods and provide the ability to run code before and after the wrapped methods), role methods (that add new functionalities to application objects), and exception handlers. The aspects composition issue is handled through a well-defined wrapping controller that specifies for each wrapped object at wrap-time, runtime or both, the execution order of aspect objects.