Borde, C., Henry, A., and Henry, L.: Emission du gaz ammoniac excite par le rayonnement d'un laser a gaz carbonique. Comptes Rendus, Aca ...

Title Information: ENGLISH; CONTRIBUTION A L'ETUDE DU DEGAGEMENT DES GAZ DE FISSION DANS LES COMBUSTIBLES NUCLEAIRES METALLIQUES. Author(s): KRYGER, B. ...

� zone active �. Elle a une position longitudinale bien d6termin6e pour un debit de gaz inject6 (Q), diam debits de gaz inject6. Le champ magn6tique longitudinal B de confinement utilise est maintenu a un niveau de la cavite cathodique (Q : debit d'injection du gaz a TPN). La figure 2 repr6sente la courbe de

13 juil. 2010 ... un instrument qui mesure la vitesse du vent. A cup anemometer. Image courtesy NASA. A. atmosph?re: le m?lange des gaz qui entoure la Terre ...

Cependant, beaucoup de r?sultats, tels que l'effet du r?chauffement par l' accroissement des gaz ? effet de serre qui ont d'abord ?t? d?montr?s par les ...

... Accession Number : AD0760631. Title : Parts Catalog for the GAZ-51A, GAZ-63 and GAZ-63A Trucks. Corporate Author ...

Few studies have been carried out on the notion of gas-solid contact in ultra-rapid reactors. Both gas and solid move in the reactor and the contact can be directly estimated when using a chemical reaction such as cumene cracking. It's a pure and light fe...

This report describes the activities in a project to study waves and turbulence in plasmas which are being conducted by the French LAP and the LPGP. Studies aimed at studying resonant absorption of electromagnetic waves in quiescent plasma with a controll...

constitue I'anode. Sur I'autre chariot mobile est montee une sonde electrostatique. -Fonctions deristiques de sondes electrostatiques presentant un courant electronique assez proche d'une fonction on consid6re la caracteristique de sonde electrostatique representant les variations du courant de sonde en

Methods for measuring mass flows in gas solid fluids are reviewed. Flowmeters; simultaneous evaluation of average velocity and density; and volumetric analysis are discussed. Methods based on ionizing radiation, dielectric constant measurement, induced cu...

Cracked hydrogen containing 20 to 22 per cent of carbon dioxide is washed in a solution of potassium carbonate. The solution containing carbon dioxide is heated in an exchanger where the input cracked gas yields heat. It is then treated in a column contai...

25 nov. 2001 ... Ces collisions d?shabillent les atomes du gaz de leurs ?lectrons ... Les atomes de mercure dans le plasma g?n?rent tr?s efficacement de la ...

, the commitment to the Kyoto Protocol in reducing greenhouse gases emission has aggravated this view. Faced'engagement du protocole de Kyoto dans la r�duction de l'�mission des gaz � effet de serre a aggrav� cette Community and Climate change Protection 3.1 What is climate change 3.1.1. The greenhouse Effect

24 nov. 2009 ... Les avions sont d?j? reproch?s pour 13 pourcent des ?missions de gaz ? effet de serre produit par les humains du secteur de transportation, ...

The worldwide distribution of combined cycle generators using simple recuperation, supercharged boilers, post combustion, and parallel combustion and complex cycles is summarized. Clean energy, fuel oil, coal, fluidized bed, and gasification based process...

education were more aware of the greenhouse gas debate and supportive of CCS, whilst younger Australians Boissieu. Rapport du groupe Facteur 4: La division par quatre des �emissions de gaz `a effet de serre de la and Minist`ere de l'�economie des finances et de l'industrie, November 2006. URL http: //www.effet

has been designed to monitor the C02 rate in enriched greenhouses. Introduction Les capteurs h fibres des problAmes d'adaptation. En effet la faiblesse de l'intensitA des raies d'absorption du gaz effectuer des mul- tiplexages optiques. En effet dans les serres agricoles oh la tempArature et l

The catalog is a listing of the assemblies and parts of the GAZ 51A, GAZ 63, and GAZ-63A TRUCKS. The GAZ 51A is still being produced by the Gor'kiy Motor Vehicle Plant while the other two are no longer in production. The parts in this catalog are arranged...

Nous pr�sentons un dispositif qui permet de pi�ger simultan�ment les deux isotopes majoritaires du chrome: le 52 Cr bosonique et le 53 Cr fermionique. L'�tat d'avancement de l'exp�rience est d�crit. Les perspectives scientifiques et les motivations du choix de l'atome de chrome sont discut�es. Le chrome a la particularit� d'avoir un fort ...

Les problemes d'enseignement de la chimie des gaz parfaits sont donc importants. Si plusieurs etudes ont ete realisees dans le but d'identifier et d'interpreter ces problemes, aucune recherche, a notre connaissance, n'a ete realisee sur l'enseignement des lois sur les gaz parfaits. Notre recherche sur l'enseignement est donc pionniere. Elle a pour objectif ...

Oxygen resistive titanium dioxide sensors are useful to control combustion but their studies raise fundamental problems. The non-stoichiometry of titanium dioxide is studied in the 870-1 100 K temperature range by using, out of equilibrium, gas mixture flow of CO, CO2, O2 and Ar. The electrical resistance of sintered samples (dense or porous) or films is measured in steady-state conditions as a ...

Le dispositif de protection est prevu pour un systeme de refroidissement par circulation de fluide sous pression sous forme de liquide, de gaz de vapeur ou de fluide en deux phases. Un reservoir est dispose pour injecter du fluide sous pression dans une region du systeme de refroidissement par un injecteur afin de maintenir un ...

Ce projet de maitrise consiste principalement en une etude experimentale de la production de noir de carbone a haute valeur a partir des fractions lourdes du gaz naturel et a l'aide d'une plasma genere par induction electromagnetique. Cette etude comprend les aspects thermodynamiques de la decomposition des hydrocarbures comme le propane et le n-butane, la ...

d'une d4tente de Joule-Thomson h travers une vanne de d4tente. Avec les hypothbses de compression (i fonction ddfmie par l'dquation (A8) C~ coefficient de perte de charge c~ chaleur massique I volume constant Iiigorifique W G~ ddbit massique de gaz kg/s H enthalpie massique J/kg.K t(,n,n' coefficients polytropiques du

The operation of rotating machines at high altitudes and of motion- transmitting devices in reactors is made difficult by the high wear and friction of sliding surfaces in a dry atmosphere. The friction of different grades of carbon on metals and on carbon itself was studied in dry atmospheres of oxygen, nitrogen, and carbon dioxide and in a humid atmosphere. The chemically or ...

Par la m�thode d'impulsions par recouvrement d'�chos, la vitesse des ultrasons � la fr�quence de 15 MHz a �t� mesur�e pour la s�rie des gaz rares � la temp�rature de 298.15 K dans un tr�s large domaine de densit�s (correspondant � des pressions allant jusqu'� 10 kbar pour les gaz l�gers). La connaissance de la densit� ...

The United States and Canada Northern Oil and Gas Research Forum 2008, Current Status and Future Directions for the Beaufort Sea, North Slope and Mackenzie Delta, held in Anchorage, Alaska 28 30 October 2008, was an accomplishment that demonstrated vision...

Le developpement des codes et de normes bases sur une methodologie scientifique requiert la capacite de predire l'etendue inflammable de deversements gazeux d'hydrogene sous differentes conditions. Des etudes anterieures ont deja etabli des modeles bases sur les lois de conservation de la mecanique des fluides basees sur des correlations experimentales qui permettent de predire la decroissance de ...

xml:lang="fr">R�sum�Le pr�sent travail consiste � �valuer les performances d'une tour � pulv�risation destin�e au d�poussi�rage d'un effluent gazeux �manant d'une installation industrielle de s�chage de particules solides. Un mod�le d'�coulement a �t� utilis� pour d�crire les ph�nom�nes de capture solides par un liquide en tenant compte des impacts ...

Le systeme de commande selon l'invention est caracterise par un element absorbeur de neutrons souples tel qu'une chaine en matiere absorbant les neutrons qui est descendue dans un canal du coeur du reacteur de facon que son action debute par le bas du coeur du reacteur, la montee et la ...

La pompe est caracterisee en ce qu'elle comporte un dispositif destine a soumettre le fluide a pomper a des impulsions repetees alors que ce fluide est renferme dans une chambre comportant des raccords d'entree et de sortie dans chacun desquels une valve fluidique est montee de maniere que les impulsions facilitent la penetration de ce fluide dans la chambre par la valve ...

Des points quantiques contenant un nombre discret et variable d'electrons sont formes dans un gaz bi-dimensionnel d'electrons a l'aide de grilles metalliques. Le transport electrique, le blocage de spin et la detection de charge sont employes comme outils spectroscopiques permettant de sonder les proprietes de ces nanostructures. Ces techniques permettent aussi de controler ...

We analyse the mecanisms of the transient response of TiO2-film EGO (Exhaust Gas Oxygen) sensors to partial oxygen pressure. This analysis, in agreement with the steady-state behaviour, is based upon the diffusion theory. Moreover, our results corroborate the decrease of the response time when Pt is incorporated to the film or when the thickness of the film is lessened. Nous analysons les ...

Gas de France is the primary transporter and distributor of natural gas in France, operating some 28,000 kilometers of gas pipelines. In 1996, Gas de France and Gas du Sud Ouest moved forward with the Artere du Midi consisting of a 375-kilometer gas pipeline, respectively in charge of 200-kilometer and a 175-kilometer sections linking the east and west ...

We describe how lattice-gas cellular automata may be used to simulate evaporation phenomena in models of porous media constructed at the pore scale. Two-dimensional simulations of evaporation are performed in simple channel geometries and in a model of a microscopically disordered porous medium. We describe a variant of the lattice pas, called the liquid-gas model. By static and dynamic tests we ...

Dans un alliage, toute modification de l'environnement cristallographique s'accompagne d'une variation des concentrations locales des constituants de l'alliage. La s�gr�gation peut ainsi �tre induite par des distorsions de liaisons, comme au coeur des joints de grains, ou par des variations du nombre de coordination, comme en surface. Pour mod�liser ces variations de ...

... Accession Number : ADM001871. Title : Micro Gas Turbines (Micro turbines a gaz) (CD-ROM). Corporate Author : NATO ...

The kinetics and reaction mechanisms of Mg alloys or pure Mg with water- saturated O/sub 2/, N/sub 2/, air and CO/sub 2/ were examined at 350 to 600 deg C. The chemical reactivity of Mg and the magnesia surface formed in the reaction are discussed in relation to the various gases. It was found that metal sublimation occurs more easily as the surrounding atmosphere is less oxidizing. The ...

Nous �tudions l�effet des interactions coulombiennes sur la localisation d�Anderson dans le gaz bidimensionnel d��lectrons d�sordonn�. L�objectif est de statuer sur la question de l�existence de m�taux � deux dimensions. En l�absence d�interaction, la th�orie d��chelle de la localisation pr�dit qu�un d�sordre infinit�simal suffit � ...

The continuity, momentum and energy equations for two-dimensional compressible turbulent boundary layers are solved using the k-epsilon turbulence model and the extended mixing length approach to calculate the shear stress terms. The finite difference equ...

This paper describes a remote optical fibre sensor for the carbon dioxide detection by molecular absorption in the near infrared (4.3 ?m) corresponding to fundamental mode ?3. To overcome the problem of the strong attenuation signal of optical fibre in the near infrared, we have used the opto-suppling technique which changes the working wavelength from 4.3 ?m to 860 nm and permits the use of ...

A description is given of a possible utilization of a ferrous sulfate dosimeter with ferrous orthophenantroline as a way of determining the absorbed dose. The process was applied to measurement of the gamma radiation of Co/sup 60/ and the relative middle values of G/sub Fe+//sub +/ determined with an accuracy of plus or minus 2.75% of dose rate in the range from 1,000 to 30,000 rads. ...

Two causes of poor recoverability are migration of stored gas far from the injection well and upward coning of water into withdrawal wells. We conducted laboratory and numerical simulation investigation of the use of aqueous foams to block the flow of gas or liquid to ameliorate these problems. Experiments in sandstone cores at simulated reservoir conditions showed that foam reduces the ...

Nous pr�sentons les r�sultats exp�rimentaux et th�oriques obtenus sur le laser X-UV � 41,8 nm cr�� en sch�ma collisisonnel � ionisation par champ optique dans des tubes capillaires. Une �tude d�taill�e a �t� men�e dans le but de comprendre les effets li�s au guidage. Le plasma amplificateur est cr�� dans un tube capillaire de quelques cm de long. L'�mission ...

...circumstances will the Corporation pay interest that accrues on qualified student...COMMUNITY SERVICE PAYMENT OF ACCRUED INTEREST § 2529.10 Under what circumstances will the Corporation pay interest that accrues on qualified...

...false Account 242, Miscellaneous current and accrued liabilities. 367.2420... Balance Sheet Chart of Accounts Current and Accrued Liabilities § 367.2420 Account 242, Miscellaneous current and accrued liabilities. This...

...false Account 242, Miscellaneous current and accrued liabilities. 367...Balance Sheet Chart of Accounts Current and Accrued Liabilities § 367.2420 Account 242, Miscellaneous current and accrued liabilities....

...2011-04-01 false Miscellaneous current and accrued liabilities. 256.242...UTILITY HOLDING COMPANY ACT OF 1935 7. Current and Accrued Liabilities § 256.242 Miscellaneous current and accrued liabilities. This...

... 2011-04-01 false Miscellaneous current and accrued assets. 256.174 Section...UTILITY HOLDING COMPANY ACT OF 1935 3. Current and Accrued Assets § 256.174 Miscellaneous current and accrued assets. This account...

... 2015 Trade accounts payable 2021 Accounts payable�other 2025 Current obligations under capital leases 2080 Accrued salaries, wages 2110 Accrued vacation liability 2120 Accrued interest 2125 Accrued taxes...

L'�mergence des piles � combustible et l'apparition de l'hydrog�ne comme carburant dans des v�hicules grand public comme les autobus, suscitent un �lan fort pour la mise au point de technologies nouvelles pour la production d'hydrog�ne d�centralis�e et � petite �chelle. Du fait de sa richesse en hydrog�ne. des r�serves disponibles et de son ...

Excited states are probably occurring, at an intermediate stage, in the VUV photoionization process of liquid hydrocarbons, as suggested by a Stern-Volmer behaviour when interacting with electron quenchers. They are here detected in the VUV photoionization spectrum of cyclohexane and dimethyl-2-2-butane in liquid phase. Some of the discernable peaks can be assigned as valence and Rydberg states, ...

This paper deals with optimization of heat pipe in a solid-gas chemical heatpump. The core of such a system, namely a reactor, contains a porous solid able to react with a gas coming from an evaporator. The latter chemical reaction gives off heat. Conversely, if we supply the reactive media with heat, the previous chemical reaction occurs in the endothermic way and the gas so desorbed goes to a ...

The manual presents detailed cut-away drawings of the design features of the GAZ-66 and its modifications. Recommendations for technical servicing, replacement of basic parts in the course of operation, principles of operation of the complex mechanisms of...

... La monographie suivante sloccupe en resumd do la dynamique des gaz des canons i grande vitesse en employant un gaz do poids mol4culaire ...

This paper is the press release of the talk given at the 'Gaz de France scientific meeting with the press' by P. Gadonneix, chairman of Gaz de France company, on October 7, 1998. The aim of this talk concerns the new French and European supply link for br...

... helium and neon atoms gaz rares appes collision avec des atomes de gaz rares /helium, neon/ < ...

Mar 1, 2011... atoms gaz rares appes collision avec des atomes de gaz rares /helium, neon/ < ...

Cette th�se pr�sente un mod�le d'�volution chimique et spectro-photom�trique coh�rent pour l'ensemble des galaxies spirales. Dans une premi�re �tape, nous avons "mod�lis�" la Voie Lact�e pour laquelle les nombreuses observables permettent de contraindre les param�tres du mod�le. Nous avons ensuite g�n�ralis� le mod�le de la Voie Lact�e � ...

Using a two stage light gas gun, we study under shock-loading two metallic alloys behaviours. Compression and release isentrope are determined. For this purpose, impedance matching method associated with electronic time-arrival measurement is used. We note a linear relationship U(u) [shock velocity versus material velocity] for the two metallic alloys. The Griineisen parameter and sound velocity ...

The purpose of this work is to evaluate the effect on a particle flux of shadowing by the restricted geometry of an opaque structure. We will demonstrate a general method for deriving angular distribution functions in the neighborhood of the opaque structure, given the incoming particle velocity distribution function. This method will be specifically applied to particles transported through a ...

Les premi�res l�gislations antipollution ont �t� mises en place suite � la d�tection, aux Etats Unis plus particuli�rement en Californie, du smog photochimique et des pluies acides, n�fastes pour la faune et la flore. Les estimations de la contribution de l'automobile aux �missions de compos�s, consid�r�s comme pr�curseurs de ces ph�nom�nes, ont ...

A plasma torch allows two flow regimes: either a laminar (silent mode) or a turbulent mode (noisy mode) which have different properties. The transition of regime is controlled by parameter change (gas flow rate, current arc and anode diameter) and followed by a noise degree change. This study deals with the characterization of this transition by acoustic methods. Wave and spectral analysis of ...

We present in this paper a 2D numerical modelling of a dc argon plasma torch. This model is based on the resolution of the electromagnetism and Navier-Stokes equations by the control volume method of Patankar. This model allows to describe the velocity and temperature fields between the electrodes and in the plasma jet. Turbulence phenomenon is taken into account by a Prandtl's mixing length ...

The crystalline orientation of ZnO thin films deposited by an aerosol CVD process is studied with regard to the experimental conditions. The quality of the C-axis oriented growth depended on the substrate temperature, on the deposition rate and also on the hygrometric degree of the carrier gas. The quality of the gold sublayer influenced also the quality of the ZnO textured growth. Under a dry gas ...

The main purpose of this paper is to explain the operation of pulse tubes refrigerators (PTR) by a network theory approach: the voltage and the current represent respectively the hydrodynamic parameters pressure P and mass flow rate m of the system. Each impedance is treated as a circuit of equivalent electrical element: resistance, capacitance or inductance. At the hot end of the PTR, different ...

On peut creer un gaz electronique bidimensionnel en utilisant le potentiel de confinement d'une couche mince d'un semiconducteur dans un substrat fait d'une autre semiconducteur de gap plus eleve. L'ajout d'un champ magnetique perpendiculaire au plan de confinement modifie de facon drastique les proprietes du gaz electronique. Pour des ...

Nous presentons une etude des fluctuations magnetiques de la phase normale de l'oxyde de cuivre supraconducteur La_{2-x}Sr _{x}CuO_4 . Le compose est modelise par le Hamiltonien de Hubbard bidimensionnel avec un terme de saut vers les deuxiemes voisins (modele tt'U). Le modele est etudie en utilisant l'approximation de la GRPA (Generalized Random Phase Approximation) et en incluant les effets de ...

Les sources de rayonnement Extr�me Ultraviolet (EUV) par d�charge capillaire connaissent un int�r�t de plus en plus consid�rable pour de nombreuses applications scientifiques et technologiques. Au GREMI, nous �tudions le fonctionnement des sources de rayonnement EUV �mettant � 13.5 nm pouvant r�pondre � certaines applications li�es � la nouvelle g�n�ration de la ...

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