Search results for "CF"

Modelling and simulation of gas-liquid hydrodynamics in mechnically stirred tanks

2007

Abstract Computational fuid dynamics (CFD) is an increasingly important tool for carrying out realistic simulations of process equipment. In the case of multiphase systems the development of CFD models is less advanced than for single-phase systems. In the present work CFD simulations of gas–liquid stirred tanks are reported. An Eulerian–Eulerian multi-fluid approach is used in conjunction with the simplest two-phase extension of the k–ɛ turbulence model. All bubbles are assumed to share the same size. The effect of inter-phase forces on simulation results is separately considered. As concerns drag, it is shown that the sole parameter needed to characterize the dispersed phase behaviour is …

Thermal-hydraulic behaviour of the DEMO divertor plasma facing components cooling circuit

2017

Abstract Within the framework of the Work Package DIV 1 – “Divertor Cassette Design and Integration” of the EUROfusion action, a research campaign has been jointly carried out by ENEA and University of Palermo to investigate the thermal-hydraulic performances of the DEMO divertor cassette cooling system. A comparative evaluation study has been performed considering three different options for the cooling circuit layout of the divertor Plasma Facing Components (PFCs). The potential improvement in the thermal-hydraulic performance of the cooling system, to be achieved by modifying cooling circuit layout, has been also assessed and discussed in terms of optimization strategy. The research acti…

X-ray Spectroscopy of (Ba,Sr,La)(Fe,Zn,Y)O3-δIdentifies Structural and Electronic Features Favoring Proton Uptake

2020

Mixed protonic–electronic conducting oxides are key functional materials for protonic ceramic fuel cells. Here, (Ba,Sr,La)(Fe,Zn,Y)O3−δ perovskites are comprehensively investigated by X-ray spectroscopy (in oxidized and reduced states). Extended X-ray absorption fine structure shows that Zn,Y doping strongly increases the tendency for Fe–O–Fe buckling. X-ray absorption near-edge spectroscopy at the Fe K-edge and X-ray Raman scattering at the O K edge demonstrate that both iron and oxygen states are involved when the samples are oxidized, and for the Zn,Y doped materials, the hole transfer from iron to oxygen is less pronounced. This can be correlated with the observation that these material…

Evaluation of Fused Pyrrolothiazole Systems as Correctors of Mutant CFTR Protein.

2021

Cystic fibrosis (CF) is a genetic disease caused by mutations that impair the function of the CFTR chloride channel. The most frequent mutation, F508del, causes misfolding and premature degradation of CFTR protein. This defect can be overcome with pharmacological agents named “correctors”. So far, at least three different classes of correctors have been identified based on the additive/synergistic effects that are obtained when compounds of different classes are combined together. The development of class 2 correctors has lagged behind that of compounds belonging to the other classes. It was shown that the efficacy of the prototypical class 2 corrector, the bithiazole corr-4a, could be impr…

CGTU et PCF en Saône et Loire

2003

National audience; La CGTU, syndicat communisant constitué en 1922 après une scission avec la CGT, est un bon exemple pour l’étude de la pluralité de l’engagement.De la CGTU au Parti Communiste, du parti au syndicat, quelles sont véritablement les passerelles qui relient ces deux organisations ? Pour tenter de cerner la question de cet engagement pluriel, nous explorerons trois axes. Tout d’abord nous ferons une présentation de la situation du PCF et de la CGTU en Saône et Loire. Nous nous attacherons d’abord à étudier la genèse de ces organisations. Nous étudierons également leurs implantations respectives dans le département. Dans une seconde partie nous nous intéresserons aux structures …

L’eurocommunisme du PCF, les lendemains qui déchantent

2015

International audience

Réseaux et stratégies pour la diffusion du cinéma roumain en France de 1950 à 1954

2015

International audience; Since communists came to power in Romania, cinema became an important propagandatool. The government invested largely, in addition to the production field, in the development ofdistribution and exploitation of movies. Whereas the rural area represented the major target, theforeign exportation was the last domain that concern the government. Nevertheless, in the bipolarcontext of cold war, the new Romanian cinema policy promoted by the communists created theconditions for a larger participation, through cinema, at the ideological fight between East and West.This article analyses the resources, the strategies, the networks and the policies ofRomanian political and cult…

Une non candidature en campagne : le PCF, l'organisation et le déroulement de l'élection présidentielle de 1965

2015

International audience

Le formalisme algébrique U(p+1) adapté aux modes de pliage des molécules tétraédriques.

1996

Transaction costs and private provision of public goods: a survey of french speaking literature

2003

The authors survey the French-speaking literature on the private provision of public goods. As it is now accepted that transaction costs are one of the most important factors to analyze market failures, the authors emphasize particularly transaction cost economics research works. They wrote twelve lecture notes (annex).