ETUDE PAR SPECTROSCOPIE DE LA CINETIQUE DES DECHARGES ELECTRIQUES DANS LES MELANGES N#2-O#2 PDF Download
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Author: GILLES.. CARTRY
Publisher:
ISBN:
Category :
Languages : fr
Pages : 232
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Book Description
CE TRAVAIL PORTE SUR L'ETUDE DES TRANSFERTS D'ENERGIE ENTRE ESPECES NEUTRES EN POST DECHARGE TEMPORELLE D'UN MELANGE N#2-O#2, AINSI QUE SUR L'ETUDE DES REACTIONS DES ATOMES D'OXYGENE SUR LES PAROIS EN SILICE DU TUBE A DECHARGE. LES TEMPS CARACTERISANT LES TRANSFERTS D'ENERGIE ET LES REACTIONS ATOMIQUES DE SURFACE ETANT TRES DIFFERENTS, LES DEUX ETUDES PEUVENT ETRE MENEES EN POST DECHARGE TEMPORELLE INDEPENDAMMENT. LES TRANSFERTS D'ENERGIE IMPLIQUANT PRINCIPALEMENT LE METASTABLE N#2(A), SONT ETUDIES PAR L'ANALYSE DES FLUORESCENCES DES ETATS RADIATIFS MOLECULAIRES N#2(B), N#2(C) ET NO(A) OBSERVES PAR SPECTROSCOPIE OPTIQUE D'EMISSION RESOLUE EN TEMPS. PAR SPECTROSCOPIE OPTIQUE D'ABSORPTION RESONNANTE VUV RESOLUE EN TEMPS, NOUS AVONS MESURE L'EVOLUTION TEMPORELLE DE LA DENSITE ABSOLUE DES ATOMES D'OXYGENE. CETTE EVOLUTION NOUS PERMET D'ETUDIER LES PROCESSUS ABOUTISSANT A LA PERTE DE CES ATOMES A LA PAROI. LES DIAGNOSTICS ONT ETE ASSOCIES A DEUX MODELES NUMERIQUES, L'UN PORTANT SUR LA CINETIQUE EN VOLUME DES PARTICULES NEUTRES, L'AUTRE PORTANT SUR LA CINETIQUE DE SURFACE DES ATOMES D'OXYGENE. PLUSIEURS RESULTATS FONDAMENTAUX ONT AINSI PU ETRE OBTENUS : NOUS AVONS MONTRE QUE PAR UN CHOIX APPROPRIE DE LA FREQUENCE DE REPETITION DE L'IMPULSION DE COURANT, ON POUVAIT S'AFFRANCHIR DE LA CINETIQUE VIBRATIONNELLE DU NIVEAU FONDAMENTAL DE L'AZOTE. LES PRINCIPAUX MECANISMES D'EXCITATION DES ETATS RADIATIFS NE FAISANT PAS INTERVENIR LES ELECTRONS ONT ETE DETAILLES. LA CINETIQUE GAZEUSE DES MOLECULES NO, DU METASTABLE N#2(A) OU ENCORE DES ATOMES D'AZOTE A ETE DETERMINEE. NOUS AVONS DETERMINE LA PROBABILITE DE PERTE DES ATOMES D'OXYGENE SUR LA SILICE ET AVONS ETUDIE SES VARIATIONS EN FONCTION DE L'ETAT DE LA SURFACE. EN PARTICULIER NOUS AVONS MONTRE QUE L'ON POUVAIT OBTENIR UNE EVOLUTION AU COURS DES POST DECHARGES SUCCESSIVES DE CETTE PROBABILITE. NOUS AVONS ATTRIBUE CETTE EVOLUTION A UNE MODIFICATION PULSE APRES PULSE DU TAUX DE COUVERTURE DES SITES DE CHIMISORPTION.
Author: GILLES.. CARTRY
Publisher:
ISBN:
Category :
Languages : fr
Pages : 232
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Book Description
CE TRAVAIL PORTE SUR L'ETUDE DES TRANSFERTS D'ENERGIE ENTRE ESPECES NEUTRES EN POST DECHARGE TEMPORELLE D'UN MELANGE N#2-O#2, AINSI QUE SUR L'ETUDE DES REACTIONS DES ATOMES D'OXYGENE SUR LES PAROIS EN SILICE DU TUBE A DECHARGE. LES TEMPS CARACTERISANT LES TRANSFERTS D'ENERGIE ET LES REACTIONS ATOMIQUES DE SURFACE ETANT TRES DIFFERENTS, LES DEUX ETUDES PEUVENT ETRE MENEES EN POST DECHARGE TEMPORELLE INDEPENDAMMENT. LES TRANSFERTS D'ENERGIE IMPLIQUANT PRINCIPALEMENT LE METASTABLE N#2(A), SONT ETUDIES PAR L'ANALYSE DES FLUORESCENCES DES ETATS RADIATIFS MOLECULAIRES N#2(B), N#2(C) ET NO(A) OBSERVES PAR SPECTROSCOPIE OPTIQUE D'EMISSION RESOLUE EN TEMPS. PAR SPECTROSCOPIE OPTIQUE D'ABSORPTION RESONNANTE VUV RESOLUE EN TEMPS, NOUS AVONS MESURE L'EVOLUTION TEMPORELLE DE LA DENSITE ABSOLUE DES ATOMES D'OXYGENE. CETTE EVOLUTION NOUS PERMET D'ETUDIER LES PROCESSUS ABOUTISSANT A LA PERTE DE CES ATOMES A LA PAROI. LES DIAGNOSTICS ONT ETE ASSOCIES A DEUX MODELES NUMERIQUES, L'UN PORTANT SUR LA CINETIQUE EN VOLUME DES PARTICULES NEUTRES, L'AUTRE PORTANT SUR LA CINETIQUE DE SURFACE DES ATOMES D'OXYGENE. PLUSIEURS RESULTATS FONDAMENTAUX ONT AINSI PU ETRE OBTENUS : NOUS AVONS MONTRE QUE PAR UN CHOIX APPROPRIE DE LA FREQUENCE DE REPETITION DE L'IMPULSION DE COURANT, ON POUVAIT S'AFFRANCHIR DE LA CINETIQUE VIBRATIONNELLE DU NIVEAU FONDAMENTAL DE L'AZOTE. LES PRINCIPAUX MECANISMES D'EXCITATION DES ETATS RADIATIFS NE FAISANT PAS INTERVENIR LES ELECTRONS ONT ETE DETAILLES. LA CINETIQUE GAZEUSE DES MOLECULES NO, DU METASTABLE N#2(A) OU ENCORE DES ATOMES D'AZOTE A ETE DETERMINEE. NOUS AVONS DETERMINE LA PROBABILITE DE PERTE DES ATOMES D'OXYGENE SUR LA SILICE ET AVONS ETUDIE SES VARIATIONS EN FONCTION DE L'ETAT DE LA SURFACE. EN PARTICULIER NOUS AVONS MONTRE QUE L'ON POUVAIT OBTENIR UNE EVOLUTION AU COURS DES POST DECHARGES SUCCESSIVES DE CETTE PROBABILITE. NOUS AVONS ATTRIBUE CETTE EVOLUTION A UNE MODIFICATION PULSE APRES PULSE DU TAUX DE COUVERTURE DES SITES DE CHIMISORPTION.
Author: Ahmed Belasri
Publisher: Springer Nature
ISBN: 9811554447
Category : Technology & Engineering
Languages : en
Pages : 659
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Book Description
This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Author: H. R. Sasse
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 792
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Book Description
Preface Adhesion is a phenomenon architects and civil engineers are not very familiar with. In other disciplines knowledge about surface properties and the background of bonding energies is also far from satisfactory; nevertheless there are many important· applications in concrete engineering, where adhesion is necessary for success and durability. These include: - coating and painting - repair of concrete surfaces - bonding of fresh to old concrete - crack injection - glueing of precast elements - glueing of steel to concrete, etc. In 1981 RILEM established the technical committee 52-RAC 'Resin Adherence to Concrete'. The main aims of the committee's work were - to collect research results and practical experiences - to initiate and coordinate research programs - to develop, on a scientific base, test methods for field and for laboratory purposes. One of the results of the committee's work is a state-of-the-art report, which will be presented orally as a General Report at the International Symposium ISAP '86, and will be printed either in the RILEM journal Materials and Structures or separately. Several test recommendations have been elaborated and will be prepared as drafts for the participants ofISAP '86. These are: - direct tensile test - pull-off test - direct shear test - slant shear test - four-point bending test - dynamic loading test - thermal compatibility test (two versions) - injectibility test.
Author: Alfonso Jiménez
Publisher: Royal Society of Chemistry
ISBN: 1849738793
Category : Science
Languages : en
Pages : 374
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Book Description
A comprehensive overview of the synthesis, characterisation, properties and applications of poly(lactic acid) science and technology covering scientific, ecological, social and economic issues.
Author: Wonbong Choi
Publisher: CRC Press
ISBN: 1439861889
Category : Science
Languages : en
Pages : 374
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Book Description
Since the late 20th century, graphene-a one-atom-thick planar sheet of sp2-bonded carbon atoms densely packed in a honeycomb crystal lattice-has garnered appreciable attention as a potential next-generation electronic material due to its exceptional properties. These properties include high current density, ballistic transport, chemical inertness,
Author: K.H. Becker
Publisher: CRC Press
ISBN: 9780750309622
Category : Science
Languages : en
Pages : 704
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Book Description
Atmospheric-pressure plasmas continue to attract considerable research interest due to their diverse applications, including high power lasers, opening switches, novel plasma processing applications and sputtering, EM absorbers and reflectors, remediation of gaseous pollutants, excimer lamps, and other noncoherent light sources. Atmospheric-pressure plasmas in air are of particular importance as they can be generated and maintained without vacuum enclosure and without any additional feed gases. Non-Equilibrium Air Plasmas at Atmospheric Pressure reviews recent advances and applications in the generation and maintenance of atmospheric-pressure plasmas. With contributions from leading international researchers, the coverage includes advances in atmospheric-pressure plasma source development, diagnostics and characterization, air plasma chemistry, modeling and computational techniques, and an assessment of the status and prospects of atmospheric-pressure air plasma applications. The extensive application sections make this book attractive for practitioners in many fields where technologies based on atmospheric-pressure air plasmas are emerging.
Author: Jacques Lafontaine
Publisher: Springer
ISBN: 3319207350
Category : Mathematics
Languages : en
Pages : 408
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Book Description
This book is an introduction to differential manifolds. It gives solid preliminaries for more advanced topics: Riemannian manifolds, differential topology, Lie theory. It presupposes little background: the reader is only expected to master basic differential calculus, and a little point-set topology. The book covers the main topics of differential geometry: manifolds, tangent space, vector fields, differential forms, Lie groups, and a few more sophisticated topics such as de Rham cohomology, degree theory and the Gauss-Bonnet theorem for surfaces. Its ambition is to give solid foundations. In particular, the introduction of “abstract” notions such as manifolds or differential forms is motivated via questions and examples from mathematics or theoretical physics. More than 150 exercises, some of them easy and classical, some others more sophisticated, will help the beginner as well as the more expert reader. Solutions are provided for most of them. The book should be of interest to various readers: undergraduate and graduate students for a first contact to differential manifolds, mathematicians from other fields and physicists who wish to acquire some feeling about this beautiful theory. The original French text Introduction aux variétés différentielles has been a best-seller in its category in France for many years. Jacques Lafontaine was successively assistant Professor at Paris Diderot University and Professor at the University of Montpellier, where he is presently emeritus. His main research interests are Riemannian and pseudo-Riemannian geometry, including some aspects of mathematical relativity. Besides his personal research articles, he was involved in several textbooks and research monographs.
Author: P. M. Banks
Publisher: Elsevier
ISBN: 1483260666
Category : Science
Languages : en
Pages : 445
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Book Description
Aeronomy, Part A is an attempt to make a comprehensive exposition of the processes in aeronomy, the study of composition, movement, and thermal balance of the upper regions of the planetary atmosphere. The text covers topics such as atmospheric regions and atmospheric density, the temperature and molecular mass of the atmosphere; the permanent constituents and the molecular and isotonic composition of the homosphere; and the transition from the homosphere to the heterosphere. Also covered are topics such as the temperature gradient and energies in the thermosphere, conditions at 200km and above 250km, solar radiation and ionization, and aeronomic reactions. The book is recommended for scientists, especially natural physicists, who would like to know more about the field of aeronomy and its advances.
Author: Paul K. Chu
Publisher: CRC Press
ISBN: 1466509902
Category : Science
Languages : en
Pages : 497
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Book Description
Written by a team of pioneering scientists from around the world, Low Temperature Plasma Technology: Methods and Applications brings together recent technological advances and research in the rapidly growing field of low temperature plasmas. The book provides a comprehensive overview of related phenomena such as plasma bullets, plasma penetration into biofilms, discharge-mode transition of atmospheric pressure plasmas, and self-organization of microdischarges. It describes relevant technology and diagnostics, including nanosecond pulsed discharge, cavity ringdown spectroscopy, and laser-induced fluorescence measurement, and explores the increasing research on atmospheric pressure nonequilibrium plasma jets. The authors also discuss how low temperature plasmas are used in the synthesis of nanomaterials, environmental applications, the treatment of biomaterials, and plasma medicine. This book provides a balanced and thorough treatment of the core principles, novel technology and diagnostics, and state-of-the-art applications of low temperature plasmas. It is accessible to scientists and graduate students in low-pressure plasma physics, nanotechnology, plasma medicine, and materials science. The book is also suitable as an advanced reference for senior undergraduate students.
Author: Sue Blattes
Publisher: L'Editeur : EDP Sciences
ISBN: 9782868835888
Category : English language
Languages : fr
Pages : 264
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Book Description
Cet ouvrage, devenu célèbre sous son sigle MCSE, a déjà été utilisé par plus de 50 000 étudiants, chercheurs, professionnels. L'objectif est de lire et écrire des textes en anglais scientifique avec facilité et pertinence. L'ouvrage est conçu pour que l'apprenant devienne un véritable utilisateur de l'anglais. La méthode originale repose sur l'analyse des fonctions et structures nécessaires : measurement, frequency, comparison, modification, link words, time, cause and consequence, hypothesis, modality, purpose and process, impersonal forms, compound nouns and adjectives. Dans chaque unit, des tests d'auto-évaluation permettent de se situer et de construire son parcours de formation, d'abord en définissant ses objectifs à l'aide des key points et du lexis, puis, de façon plus personnalisée, en puisant dans les examples in context, checkpoints (back to basics, word web), web search, FAQs... MCSE est l'outil de base d'une méthode qui comprend aussi d'autres outils dans la même collection (Listening Comprehension for Scientiflc English et Speaking Skills in Scientitic English). L'ouvrage est destiné à tout apprenant de niveau baccalauréat qui désire acquérir une réelle compétence dans l'écriture et la lecture de textes en anglais scientifique.
