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Determination of macroscopic quantities for a Townsend discharge in helium by both Boltzmann equation and Monte Carlo methods

Yousfi, M; Segur, P; Pareathumby, S; Marode, E (Journal de Physique Colloques, 1979)

We compare the results obtained in the study of a weakly ionized gas for a Townsend discharge which is developped in a steady uniform field. This study has been carried out in two laboratories: firstly at the Centre de ...
Determination of macroscopic quantities for a Townsend discharge in helium by both Boltzmann equation and Monte Carlo methods

Yousfi, M; Segur, P; Pareathumby, S; Marode, E (Journal de Physique Colloques, 1979)

We compare the results obtained in the study of a weakly ionized gas for a Townsend discharge which is developped in a steady uniform field. This study has been carried out in two laboratories : firstly at the Centre ...
Determination of macroscopic quantities for a Townsend discharge in helium by both Boltzmann equation and Monte Carlo methods

Yousfi, M; Segur, P; Pareathumby, S; Marode, E (Journal de Physique Colloques, 1979)

We compare the results obtained in the study of a weakly ionized gas for a Townsend discharge which is developped in a steady uniform field. This study has been carried out in two laboratories: firstly at the Centre de ...
Etude spectroscopique du role des liaisons P F et P O pontes dans les composes oxyfluores du phosphore V. Cas de P2O3F4 et de K2P2O5F2.

Addou, Ahmed; Payen, E; Durand, J; Cot, L; Vast, P (Journal of Fluorine Chemistry, 1980-01-01)

The compounds P 0 F 2 3 4 and K2P205F2 have been studied by vibrational spectroscopy. From the shifts of the symmetric vibration of the terminal PO bonds it appears that the molecular structure contracts as the number of ...
Champ de forces de symetrie locale des composés oxyfluorés du phosphore (V)—I. Les difluorodioxophosphates (DFP) alcalins

Addou, Ahmed; Vast, P; Legrand, P (Spectrochimica Acta Part A: Molecular Spectroscopy, 1982-01-01)

-Alkali phosphorofluoridates (DFP) were prepared by reaction between phosphoryl difluoride oxide P20~F4 and alkali fluorides. The caesium salt was obtained by reaction between ...
Nouvelle methode de preparation de l'acide difluorophosphorique

Addou, Ahmed; Vast, P; Semmoud, A; Palavit, G (Journal of fluorine chemistry, 1985-03-01)

Une nouvelle methode de preparation de l'acide difluorodioxo- phosphorique HP02F2 est proposee par fluoration directe de l'ion P043- par HS03F. Le rendement en HP02F2 est ...
Etude methodologique de la synthese des difluorodioxophosphates metalliques a partir de l'oxyde difluorure de phosphoryle

Addou, Ahmed; Vast, P; Semmoud, A; Palavit, G (Journal of fluorine chemistry, 1988-03-01)

Les difluorodioxophosphates m&alliques peuvent &re utilisks comme prkcurseurs de verre et cbramiques. II est done necessaire de ma&riser leur prbparation. Nous prkentons nos r&sul&ts sur une sytimatique de leur prbparation ...
La interacción social

Dominique, Picard; Edmond, Marc (Paidós, 1992)

Quedan rigurosamenre prohibidas, sin la autorización escrita de los titulares del Copyright-, bajo las sanciones establecidas en las leyes, la reproducción total o parcial de esta obra por cualquier método o procedimiento, ...
A planning algorithm for distributed manufacturing

Tibor Gyires; Balakrishnan Muthuswamy ([1993] Proceedings International Conference on Intelligent and Cooperative Information, 1993-05-12)

Distributed manufacturing (DM), downsizing, and outsourcing are becoming increasingly popular. Processes in manufacturing a product may be distributed at d@ererat (geographical) sites. A production plan in such ...
Asymptotique de Born-Oppenheimer pour la prédissociation moléculaire (cas de potentiels réguliers)

Messirdi, Bekkai (Annales de l'IHP Physique théorique, 1994)

On étudie l’opérateur P=-h2 Ox-Dy+ Y (x,~/) sur R~ x R~ lorsque h tend vers 0, et V est un potentiel régulier. On se place dans un cas où deux niveaux électroniques se croisent dans la zone classiquement interdite, et où ...
Compactness of support of solutions for some classes of nonlinear elliptic and parabolic systems

Bouchekif, M (Publicacions Matemàtiques, 1994-01-01)

In this paper, we obtain some existence Theorems of nonnegative solutions with compact support for homogeneous Dirichlet elliptic problems; we extend also these results to parabolic systems. Supersolution and comparison ...
L'aventure du raï: musique et société

Daoudi, Bouziane; Miliani, Hadj (FeniXX, 1996)

Le 4 septembre 1994, cheb Hasni, l’un des chanteurs les plus populaires de la chanson raï, est assassiné dans son quartier natal à Oran. Ce meurtre et d’autres projettent le raï dans l’actualité politique. C’est de la vie ...
VALEURS PROPRES ET RESONANCES DES MOLECULES POLYATOMIQUES DANS L'APPROXIMATION DE BORN-OPPENHEIMER1

MESSIRDI, Bekkai; DJAA, Mustapha (Annales Math matiques de l'Universit de Sidi Bel Abb s, 1997)

We study the spectrum of Schrodinger operator P (h) for a polyatomic molecul in the Born-Oppenheimer approximation where the mass ratio h2 of electronic to nuclear mass tends to zero. We prove that this study can be reduced ...
Smart permanent virtual circuits in asynchronous transfer mode networks

Tibor Gyires (1997 IEEE International Conference on Systems, Man, and Cybernetics. Computational Cybernetics and Simulation, 1997-10-12)

Asynchronous Transfer Mode (ATM) is a highspeed network technology that transmits various types of information across networks such as voice, video, image, data, etc. In an ATM network the basic data units, called cells, ...
On certain quasilinear elliptic equations with indefinite terms

Bouchekif, Mohammed (Funkcialaj Ekvacioj, 1998)

In this paper, we consider the existence of positive solutions of the fol-lowing problem: $(¥ ovalbox {¥ tt¥ small REJECT} _ {p}) $$¥ left¥{¥ begin {array}{l}-¥ Delta_ {p} um (x) g (u)-¥¥ u= 0¥ end {array}¥ right. $$¥ ...
Performance prediction of smart permanent virtual circuits in ATM networks with CACI Comnet

Tibor Gyires (SMC'98 Conference Proceedings. 1998 IEEE International Conference on Systems, Man, and Cybernetics (Cat. No. 98CH36218), 1998-10-11)

As networks becomes larger and more complex the design and management of systems become more and more difficult. New technologies, such as Asynchronous Transfer Mode, new algorithms, and bandwidth demanding applications ...
Plasma treatment of aqueous solutes: some chemical properties of a gliding arc in humid air

Addou, Ahmed; Benstaali, B; Moussa, D; Brisset, J-L (The European Physical Journal-Applied Physics, 1998-11)

The chemical properties of the gaseous species generated in a humid air gliding arc discharge are investigated. Aqueous solutions are used as the targets exposed to the plasma, and this allows to evidence strong acid and ...
Corrélations entr e cristalluries et composition des calculs

Addou, Ahmed; KAID-OMAR, Zohra; DAUDON, Michel; ATTAR, Ahmed; SEMMOUD, Ahmed; LACOUR, Bernard (1999)

A RTICLE ORIGINAL Progrès en Urologie (1999), 9, 633-641 633 Corrélations entr e cristalluries et composition des calculs Zohra KAID-OMAR (1), Michel DAUDON (2) , Ahmed A TT AR (3) , Ahmed SEMMOUD ...
Corrélations entr e cristalluries et composition des calculs

KAID-OMAR, Zohra; DAUDON, Michel; ATTAR, Ahmed; SEMMOUD, Ahmed; LACOUR, Bernard; ADDOU, Ahmed (Progrès en Urologie, 1999)

La fragmentation des calculs par les méthodes de lithotritie endo- ou extracorporelle dépend en partie de la nature du calcul. Les complications qui peuvent résulter d'une mauvaise fragmentation justifient que ...
Methodology for modeling the impact of traffic burstiness on high-speed networks

Tibor, Gyires (IEEE SMC'99 Conference Proceedings. 1999 IEEE International Conference on Systems, Man, and Cybernetics (Cat. No. 99CH37028), 1999)

Recent results published in [1,3,4,7] prove that high-speed network traffic is more bursty and its variability cannot be predicted as assumed previously. According to the authors, network traffic has similar statistical ...

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