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Author: Stéphane Soubacq
Publisher:
ISBN:
Category :
Languages : fr
Pages : 199
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Book Description
Le premier objectif de cette thèse était d'analyser le claquage d'un intervalle d'air soumis à une haute tension et irradié par un laser Nd:YAG. Des mesures expérimentales des seuils de claquage montrent une dépendance envers la pression du gaz. L'introduction du champ effectif laser sur le temps de retard au claquage permet de rendre compte des mesures expérimentales. Le deuxième objectif comportait une modélisation du claquage optique du gaz. Pour la phase de préionisation on a simulé l'évolution de la densité et de la température électronique (ne1019cm-3, Te4×104K). La phase dynamique a été modélisée à l'aide d'un code aérodynamique 2D. Les résultats numériques concernant uniquement les neutres à l'ETL, décrivent correctement les phénomènes physiques (distribution ellipsoïdale, u104m/s, ne1018cm-3, T105K). Des mesures de vitesse d'expansion du plasma, ainsi que de densité électronique mesurée par interférométrie laser ont été réalisées et comparées aux résultats numériques.
Author: Stéphane Soubacq
Publisher:
ISBN:
Category :
Languages : fr
Pages : 199
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Book Description
Le premier objectif de cette thèse était d'analyser le claquage d'un intervalle d'air soumis à une haute tension et irradié par un laser Nd:YAG. Des mesures expérimentales des seuils de claquage montrent une dépendance envers la pression du gaz. L'introduction du champ effectif laser sur le temps de retard au claquage permet de rendre compte des mesures expérimentales. Le deuxième objectif comportait une modélisation du claquage optique du gaz. Pour la phase de préionisation on a simulé l'évolution de la densité et de la température électronique (ne1019cm-3, Te4×104K). La phase dynamique a été modélisée à l'aide d'un code aérodynamique 2D. Les résultats numériques concernant uniquement les neutres à l'ETL, décrivent correctement les phénomènes physiques (distribution ellipsoïdale, u104m/s, ne1018cm-3, T105K). Des mesures de vitesse d'expansion du plasma, ainsi que de densité électronique mesurée par interférométrie laser ont été réalisées et comparées aux résultats numériques.
Author: Peter Newmark
Publisher:
ISBN:
Category : Translating and interpreting
Languages : en
Pages : 292
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Book Description
Author: Brian Harvey
Publisher: Springer Nature
ISBN: 3030676862
Category : Technology & Engineering
Languages : en
Pages : 406
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Book Description
The story of European-Russian collaboration in space is little known and its importance all too often understated. Because France was the principal interlocutor between these nations, such cooperation did not receive the attention it deserved in English-language literature. This book rectifies that history, showing how Russia and Europe forged a successful partnership that has continued to the present day. Space writer Brian Harvey provides an in-depth picture of how this European-Russian relationship evolved and what factors—scientific, political and industrial—propelled it over the decades. The history begins in the cold war period with the first collaborative ventures between the Soviet Union and European countries, primarily France, followed later by Germany and other European countries. Next, the chapters turn to the missions when European astronauts flew to Russian space stations, the Soyuz rocket made a new home in European territory in the South American jungle and science missions were flown to study deep space. Their climax is the joint mission to explore Mars, called ExoMars, which has already sent a mission to Mars. Through this close examination of these European-Russian efforts, readers will appreciate an altogether new perspective on the history of space exploration, no longer defined by competition, but rather by collaboration and cooperation.
Author: Bloomsbury Publishing
Publisher: Bloomsbury Publishing
ISBN: 1408102579
Category : Games & Activities
Languages : en
Pages : 719
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Book Description
Anagram Solver is the essential guide to cracking all types of quiz and crossword featuring anagrams. Containing over 200,000 words and phrases, Anagram Solver includes plural noun forms, palindromes, idioms, first names and all parts of speech. Anagrams are grouped by the number of letters they contain with the letters set out in alphabetical order so that once the letters of an anagram are arranged alphabetically, finding the solution is as easy as locating the word in a dictionary.
Author: Constantin Papastefanou
Publisher: Elsevier
ISBN: 0080555985
Category : Medical
Languages : en
Pages : 187
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Book Description
Whenever radioactivity is released to the atmosphere, for example by the detonation of nuclear weapons or the testing of nuclear weapons or from nuclear reactor accidents that fraction of it which remains airborne for more than a few hours is liable to be attached to aerosol particles. The resulting radioactive aerosols are carried by atmospheric mixing processes until they settle out or are scavenged by precipitation. The radiation exposure pathway of maximum concern to humans is by inhalation of aerosols and their deposition in the respiratory tract. In this context, it is important to note that radioactive aerosols are commonly of natural origin alos. In particular, the associated radionuclides can be of natural terrestrial origin, such as the decay products of radon gas, or they can e cosmogenic, such as beryllium-7. The exposure of miners of uranium and other ores and minerals to radon and its aerosol-borne decay products is of major significance. The book describes the formation of aerosols, their aerodynamic size distribution, their atmospheric residence time, their sampling and measurement, the range of radioactive aerosols found and studied thus far, including man-made nuclides and radon decay products and their interaction with man, including deposition in the lung and subsequent health effects. - Advanced level science handbook for researchers, scientists and academics - Covers all aspects of radiation exposure in humans, including subsequent health implications - Presents the latest findings and analysis in this highly topical area
Author: Peter Newmark
Publisher: Prentice Hall
ISBN:
Category : Foreign Language Study
Languages : en
Pages : 312
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Book Description
This work is a textbook and a handbook of translation for English and foreign students working alone or on courses at degree and post-graduate level.
Author: Peter Newmark
Publisher: Multilingual Matters
ISBN: 9781853594021
Category : Language Arts & Disciplines
Languages : en
Pages : 244
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Book Description
This text covers the field of translation applied to information, human relations and literature. It is illustrated with examples and quotations. The content of the book covers the following subject areas: translation topics such as examining, assessing, capitalization, emphasis, idiolect, grecolatinisms across languages, the small print, eponyms and howlers; translation theory: differences between good and bad translation, good and bad writing, literary and non-literary texts and translations, cultural and universal factors; translation as a matter of public interest in the European Union and national parliamnents, as well as in museums and art galleries; and critical discussion of recently published books and conference proceedings.
Author: David Ward
Publisher: Fairleigh Dickinson Univ Press
ISBN: 9780838636763
Category : History
Languages : en
Pages : 260
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Book Description
This book is an in-depth analysis of three of the most crucial years in twentieth-century Italian history, the years 1943-46. After more than two decades of a Fascist regime and a disastrous war experience during which Italy changed sides, these years saw the laying of the political and cultural foundations for what has since become known as Italy's First Republic. Drawing on texts from the literature, film, journalism, and political debate of the period, Antifascisms offers a thorough survey of the personalities and positions that informed the decisions taken in this crucial phase of modern Italian history.
Author: Charles Reade
Publisher:
ISBN:
Category : Middle Ages
Languages : en
Pages : 372
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Book Description
Author:
Publisher:
ISBN:
Category : Pharmacy
Languages : en
Pages : 536
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Book Description
