Download or read book D charges barri re di lectrique la pression atmosph rique written by Aziz Berchtikou and published by Omniscriptum. This book was released on 2013 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les d charges barri re di lectrique (DBD) la pression atmosph rique font partie des plasmas hors- quilibre thermodynamique. Elles peuvent tre op r es en mode filamentaire ainsi que Townsend. Une des sp cificit s de cette d charge est qu‟une lectrode (ou les deux) est recouverte par un mat riau di lectrique. G n ralement, une DBD la pression atmosph rique est une d charge filamentaire, mais en 1968 Bartnikas a rapport l‟existence d‟une d charge luminescente uniforme dans He, maintenant dite Atmospheric Pressure Glow Discharge (APGD), c'est- -dire d charge luminescente la pression atmosph rique, caract ris e par une seule impulsion de courant par demi-cycle de la tension alternative appliqu e. Post rieurement, plusieurs chercheurs ont rapport des d charges homog nes la pression atmosph rique dans d‟autres gaz ou m langes gazeux. La majorit des tudes ont t faites dans He puisqu‟il repr sente un milieu gazeux inerte, c‟est- -dire essentiellement sans r activit chimique et sans probl mes de d composition, donc un gaz qui peut tre relativement facilement tudi et mod lis , au moins en premi re approximation.
Download or read book Caract risation et tude lectrique de d charges pointe plan barri re di lectrique dans l air pression atmosph rique en vue d en ma triser la r activit chimique written by Marc Petit and published by . This book was released on 2002 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse s'inscrit dans la problématique du contrôle de la réactivité chimique des décharges à barrières diélectriques (DBD) sous tension alternative. De nombreux paramètres permettent de contrôler cette réactivité : électriques, physiques, géométriques et hydrodynamiques. Le présent travail se consacre à la caractérisation électrique de ces décharges afin d'en maîtriser le fonctionnement. A cet effet nous avons d'abord mis au point une procédure d'analyse électrique afin d'obtenir de nombreuses caractéristiques du courant de décharge. Nous pouvons ainsi mesurer les composantes impulsionnelle et non-impulsionnelle du courant. L'étude du courant non-impulsionnel (composante pseudo-continue du courant) fait l'objet d'un chapitre. Nous montrons que dans l'alternance négative de la tension le régime de décharge est de type "glow" négatif avec un phénomène similaire à celui observé sous tension continue sans barrière diélectrique. De plus nous montrons que ce "glow" se propage dans tout l'espace interélectrode comme sous tension continue mais sans passage à l'arc. La barrière diélectrique permet des intensités de courant liées à ce "glow" beaucoup plus importantes sans qu'il y ait passage à l'arc. Le présent travail a aussi été consacré à une étude plus systématique du courant impulsionnel pour des décharges avec intervalle gazeux et sans intervalle gazeux (dites décharges de surface). Nous avons ainsi pu montrer que les décharges ne sont pas toutes de même nature, tant du point de vue de leurs caractéristiques électriques que de leur développement. Si certaines sont des streamers, d'autres ressemblent plus à un arc entravé ou avorté, ce qui peut être important dans le cadre de la transposition des modèles développés sans barrière vers les systèmes DBD. Enfin nous avons constaté que la modification des paramètres électriques ou géométriques peut parfois modifier les caractéristiques des impulsions sans engendrer des changements significatifs de la réactivité chimique.
Download or read book ETUDE D UNE DECHARGE MOYENNE FREQUENCE AVEC BARRIERE DIELECTRIQUE AINSI QUE DE LA REACTIVITE CHIMIQUE DU PLASMA GENERE APPLICATION AU TRAITEMENT D EFFLUENTS GAZEUX CHARGES EN COMPOSES ORGANIQUES VOLATILS written by EMMANUEL.. ODIC and published by . This book was released on 1998 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'IMPACT ENVIRONNEMENTAL ET SANITAIRE DES EMISSIONS, DANS L'ATMOSPHERE, D'EFFLUENTS GAZEUX CHARGES EN POLLUANTS, NOTAMMENT EN COMPOSES ORGANIQUES VOLATILS, A MOTIVE LA RECHERCHE DE TECHNOLOGIES NOUVELLES PERMETTANT LA DEPOLLUTION A MOINDRE COUT DE CES EFFLUENTS. CE TRAVAIL DE THESE A EU POUR OBJECTIF L'ETUDE D'UNE DECHARGE MOYENNE FREQUENCE AVEC BARRIERE DIELECTRIQUE, ETABLIE DANS L'AIR A PRESSION ATMOSPHERIQUE, ADAPTEE A CETTE APPLICATION. REALISEE AVEC UNE GEOMETRIE D'ELECTRODES DE TYPE MONOPOINTE - PLAN, CETTE ETUDE PERMET DE PROPOSER UN MODELE ELECTRIQUE DECRIVANT LES MECANISMES INDUITS DANS LES COMPOSANTES IMPULSIONNELLES ET SYNCHRONES DU COURANT DE DECHARGE ET DE DEGAGER UN PARAMETRE PHYSIQUE DU PLASMA, SA TEMPERATURE T P L, CORRELEE AUX PARAMETRES ELECTRIQUES DE DECHARGE ET DONT LES VALEURS ELEVEES (1500-2500 K) JUSTIFIENT LA TERMINOLOGIE DE PLASMA TIEDE, DETERMINANT SA REACTIVITE CHIMIQUE. CETTE REACTIVITE EST TESTEE SUR LE TOLUENE DONT LA DESTRUCTION EST ETUDIEE EN FONCTION DES PARAMETRES PHYSIQUES ET ELECTRIQUES DU PLASMA. UNE EXTENSION LINEAIRE DU SYSTEME PRECEDENT A ETE REALISEE, EN VUE DE L'INDUSTRIALISATION DU PROCEDE, SOUS LA FORME D'UN REACTEUR DEVELOPPANT UN DOUBLE RIDEAU DE PLASMA ET D'UNE CAPACITE VOLUMIQUE DE TRAITEMENT DE 1 M 3.H - 1. LES PERFORMANCES DE CE REACTEUR ONT ETE APPRECIEES EN OPERANT AVEC DU TOLUENE ET DE L'ISOPROPANOL (A RAISON DE 1000-2000 PPMV) EN TENANT COMPTE A LA FOIS DU TAUX DE CONVERSION DU POLLUANT (90-99%) ET DES PRODUITS STABLES DE DEGRADATION FORMES EN PHASES GAZEUSE ET PARTICULAIRE. CETTE ANALYSE A CONDUIT A LA PROPOSITION DE SCHEMAS REACTIONNELS DE TYPE COMBUSTION ET DES COMPARAISONS ETABLIES SUR UN PLAN ENERGETIQUE ONT MONTRE QUE, DANS CERTAINES CONDITIONS, UNE ENERGIE INJECTEE DANS LE PLASMA DEUX FOIS INFERIEURE A CELLE MISE EN JEU DANS UN PROCESSUS DE COMBUSTION PEUT SUFFIRE A L'OBTENTION DE RESULTATS CHIMIQUES COMPARABLES. UN CONCEPT DE CATALYSE PLASMA EST ALORS AVANCE.
Download or read book Activation physico chimique par d charge couronne filamentaire written by Christian Deniset and published by . This book was released on 2002 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Motivée par de nouvelles applications dans les sciences de l'environnement et le déclenchement de la combustion, l'étude des décharges haute pression est en plein essor. Ces décharges ont la propriété de pouvoir générer des plasmas dit " non thermiques ". Dans les plasmas non-thermiques la température des électrons est très supérieure à la températures des ions et des espèces neutres. Selon le but recherché, le contrôle de la valeur du champ électrique permet ainsi de favoriser la prédominance de certaines réactions chimiques ayant pour conséquence la disparition de certaines espèces jugées néfastes et l'apparition d'autres espèces moins nocives. Pour mener à bien ces études on utilise la modélisation. Le travail a consisté à modéliser radialement l'activité physico-chimie d'une décharge couronne en configuration pointe-plan, dans l'air à pression atmosphérique. L'objectif est d'identifier les processus réactionnels dominants ainsi que les paramètres qui les influencent. Les résultats de la modélisation confirment l'existence de l'expansion adiabatique au cœur de la décharge associée à la création d'une onde de pression, dès lors que le rayon du filament de décharge est égal à celui obtenu expérimentalement c'est à dire pris dans le domaine des dizaine de micromètres. Dans ce cas le confinement du courant de décharge entraîne une densité d'énergie déposée suffisante pour induire une expansion du milieu gazeux. D'un point de vue chimique, l'accroissement de la température du gaz et la baisse de densité du gaz au cœur de la décharge qui en résulte, modifie de façon substantielle les constantes d'Arrhenius gouvernant les réactions entre espèces lourdes et le rapport champ électrique sur densité E/N, qui défini l'activité de dissociation et d'excitation des électrons. Par ailleurs, la prise en compte du confinement des électrons par la charge d'espace positive existant à la surface du filament, induit un resserrement de l'activité dans la zone axiale ainsi qu'un accroissement de cette activité. On peut identifier trois phase dans les processus chimiques induits. Un choc rapide, du au passage du streamer. Une activité induite dans le filament de plasma sur quelques centaines de nanosecondes. Et enfin, une longue phase d'activité chimique, consécutive à la présence des radicaux et des espèces excitées laissés par les deux phases précédentes.
Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Download or read book Transportation of Dangerous Goods written by and published by . This book was released on 1985 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mineralogy in the Mining Industry written by W. Petruk and published by Elsevier. This book was released on 2000-11-29 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Techniques of performing applied mineralogy investigations, and applications and capabilities of recently developed instruments for measuring mineral properties are explored in this book intended for practicing applied mineralogists, students in mineralogy and metallurgy, and mineral processing engineers. The benefits of applied mineralogy are presented by using in-depth applied mineralogy studies on base metal ores, gold ores, porphyry copper ores, iron ores and industrial minerals as examples. The chapter on base metal ores includes a discussion on the effects of liberation, particle sizes and surfaces coatings of Pb, Cu, Fe, Ca and So4- on the recoveries of sphalerite, galena and chalcopyrite. The chapter on gold discusses various methods of determining the quantities of gold in different minerals, including 'invisible' gold in pyrite and arsenopyrite, so that a balance of the distribution of gold among the minerals can be calculated. This book also discusses the roles of pyrite, oxygen, moisture and bacterial (thiobacillus ferrooxidans) on reactions that produce acidic drainage from tailings piles, and summarizes currently used and proposed methods of remediation of acidic drainage.
Download or read book Reason Illusion and Passion written by Émilie du Châtelet and published by . This book was released on 2019-09-16 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The amazing scientist, mathematician, philosopher Émilie du Châtelet (1706-49) has widely been hailed as a rare female intellectual in the Enlightenment. At the same time, her own ideas and contributions remain largely unknown and her writings are rarely read. This is unfortunate, since she has interesting contributions to and explanations of physics, metaphysics, religion, translation, the equality of the sexes, and ethics.This book is a selection of du Châtelet's philosophical writings, in new English translations: -Foreword to "Foundations of Physics"-On the Principles of Our Knowledge (From "Foundations of Physics")-On the Existence of God (From "Foundations of Physics")-On Liberty-Translator's Preface to Mandeville's "Fable of the Bees"-On the Resurrection of the Dead (from "Examinations of the Bible")-On Happiness
Download or read book Metamorphoses written by Emanuele Coccia and published by John Wiley & Sons. This book was released on 2021-06-09 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: We are all fascinated by the mystery of metamorphosis – of the caterpillar that transforms itself into a butterfly. Their bodies have almost nothing in common. They don’t share the same world: one crawls on the ground and the other flutters its wings in the air. And yet they are one and the same life. Emanuele Coccia argues that metamorphosis – the phenomenon that allows the same life to subsist in disparate bodies – is the relationship that binds all species together and unites the living with the non-living. Bacteria, viruses, fungi, plants, animals: they are all one and the same life. Each species, including the human species, is the metamorphosis of all those that preceded it – the same life, cobbling together a new body and a new form in order to exist differently. And there is no opposition between the living and the non-living: life is always the reincarnation of the non-living, a carnival of the telluric substance of a planet – the Earth – that continually draws new faces and new ways of being out of even the smallest particle of its disparate body. By highlighting what joins humans together with other forms of life, Coccia’s brilliant reflection on metamorphosis encourages us to abandon our view of the human species as static and independent and to recognize instead that we are part of a much larger and interconnected form of life.
Download or read book 5e R union Internationale D experts Sur la Conservation de L architecture de Terre written by International Centre for the Study of the Preservation and the Restoration of Cultural Property and published by . This book was released on 1988 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific Canadian Mechanics Magazine and Patent Office Record written by Canada. Patent Office and published by . This book was released on 1966-03 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Open Work written by Umberto Eco and published by Harvard University Press. This book was released on 1989 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is significant for its concept of "openness"--the artist's decision to leave arrangements of some constituents of a work to the public or to chance--and for its anticipation of two themes of literary theory: the element of multiplicity and plurality in art, and the insistence on literary response as an interaction between reader and text.
Download or read book Dakhleh Oasis Project written by Colin A. Hope and published by Oxbow Books Limited. This book was released on 2002 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is the second produced by the Dakhleh Oasis Project devoted to reporting the preliminary results of its field work. The volume is divided into two parts: the first part includes reports on the study of various prehistoric and historic sites; the second part is devoted to the work on the settlement of Ismant el-Kharab, ancient Kellis, and two of its cemeteries. The latter papers include a description of the excavations, a discussion of the architectural evolution of the Main Temple Complex and the significance of the Large East Church, an attempt to reconstruct the Temple of Tutu using 3D computer modelling, and a study of the main wall paintings found in the Main Temple Complex. Several papers also present the results of research carried out on specific categories of artefacts and materials, such as the textiles, basketry and leather goods, ceramics, metals and metallurgy, oils, terracotta figurines, and the flora and fauna of ancient Kellis.
Download or read book Cambridge Yearbook of European Legal Studies Vol 13 2010 2011 written by Catherine Barnard and published by Bloomsbury Publishing. This book was released on 2011-12-15 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Cambridge Yearbook of European Legal Studies provides a forum for the scrutiny of significant issues in EU Law, the law of the European Convention on Human Rights, and Comparative Law with a 'European' dimension, and particularly those issues which have come to the fore during the year preceding publication. The contributions appearing in the collection are commissioned by the Centre for European Legal Studies (CELS) Cambridge, a research centre in the Law Faculty of the University of Cambridge specialising in European legal issues. The papers presented are at the cutting edge of the fields which they address, and reflect the views of recognised experts drawn from the University world, legal practice, and the institutions of both the EU and its Member States. Inclusion of the comparative dimension brings a fresh perspective to the study of European law, and highlights the effects of globalisation of the law more generally, and the resulting cross fertilisation of norms and ideas that has occurred among previously sovereign and separate legal orders. The Cambridge Yearbook of European Legal Studies is an invaluable resource for those wishing to keep pace with legal developments in the fast moving world of European integration. INDIVIDUAL CHAPTERS Please click on the link below to purchase individual chapters from Volume 13 through Ingenta Connect: www.ingentaconnect.com SUBSCRIPTION TO SERIES To place an annual online subscription or a print standing order through Hart Publishing please click on the link below. Please note that any customers who have a standing order for the printed volumes will now be entitled to free online access. www.hartjournals.co.uk/cyels/subs Editorial Advisory Board: Albertina Albors-Llorens, John Bell, Alan Dashwood, Simon Deakin, David Feldman, Richard Fentiman, Angus Johnston, John Spencer Founding Editors: Alan Dashwood and Angela Ward Ius Commune Prize 2012 Alexandre Saydé wrote Chapter 15 in this volume entitled: 'One Law, Two Competitions: An Enquiry into the Contradictions of Free Movement Law' and we are delighted to announce that he has been awarded the Ius Commune Prize 2012.
Download or read book Socialism Perestroika and the Dilemmas of Soviet Economic Reform written by John E Tedstrom and published by Routledge. This book was released on 2021-12-13 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights that Soviet economic planners and politicians must come to recognize the need to make fundamental changes, not simply incremental refinements, in the failing Soviet system. It examines the dynamics of the process of perestroika and the complexity of individual economic issues.
Download or read book The Ladybird Illustrated written by D H Lawrence and published by . This book was released on 2020-11-09 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Ladybird is a long tale or novella by D. H. Lawrence. It was first drafted in 1915 as a short story entitled The Thimble. Lawrence rewrote and extended it under a new title in December 1921 and sent the final version to his English agent on 9 January 1922. It was collected with two other tales, The Captain's Doll and The Fox, and the three novellas were then published in London by Martin Secker in March 1923 under the title The Ladybird and in New York by Thomas Seltzer as The Captain's Doll in April 1923."
Download or read book 10 Corso Como written by Carla Sozzani and published by Rizzoli Publications. This book was released on 2014-06-26 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carla Sozzani opened Galleria Carla Sozzani in September 1990 as a space for art, photography, and design housed in a converted garage at 10 Corso Como in Milan. Along with American artist Kris Ruhs, Sozzani created a space like no other. Rejecting ordinary retail norms, this concept store has always promoted a different philosophy—that of slow shopping, a succession of spaces and events that prioritize lifestyle over object acquisition. In this book, Sozzani describes her world: her style, personal taste, and opinions on fashion, travel, design, and lifestyle. The Galleria now incorporates a bookshop, a fashion and design store, and a garden café, and it is one of Milan’s hippest and most exquisitely curated spaces—a destination in itself. 10 Corso Como has become the nexus of a global network of cultural exchange through fashion, food, art, and photography that continues to inspire fashion and design. In recent years, two additional locations have been added: 10 Corso Como–Comme des Garçons in Tokyo in 2002 and a Seoul branch in 2008.
