Propagation des ondes MHD dans les couches de courant. Structure des modes et transferts énergétiques. Comparaison avec les données cluster

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (11 download)

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Book Synopsis Propagation des ondes MHD dans les couches de courant. Structure des modes et transferts énergétiques. Comparaison avec les données cluster by : Gabriel Fruit

Download or read book Propagation des ondes MHD dans les couches de courant. Structure des modes et transferts énergétiques. Comparaison avec les données cluster written by Gabriel Fruit and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Depuis le succès de la mission CLUSTER, nous pouvons étudier la structure tridimensionnelle des perturbations basse fréquence se propageant dans les régions clefs de la magnétosphère terrestre (magnétopause, queue magnétique). Afin d'aider l'interprétation de ces données cette thèse propose un cadre théorique auto-cohérent visant à étudier la réponse linéaire d'une couche de plasma non homogène à une perturbation initiale, dans l'approximation de la MHD idéale. En particulier, le calcul est mené jusqu'à la reconstruction finale des signaux spatio-temporels avec une discussion des amplitudes obtenues et des transferts énergétiques qui en découlent. Cette dernière étape est essentielle dans la perspective d'une comparaison avec les données CLUSTER. L'étude des modes propres de la queue magnétosphérique terrestre montre l'existence de deux catégories d'oscillations : des modes globaux oscillant à des fréquences discrètes et confinés au centre de la couche, et des modes continus liés au phénomène d'absorption résonante et dont l'amplitude décroît au cours du temps. En utilisant diverses géométries de pulses initiaux, nous étudions le couplage entre l'excitateur et ces modes propres. Il est mis en évidence que le couplage avec les modes globaux est optimal pour un pulse dont la taille est voisine de l'épaisseur de la couche...

Guide to Nuclear Power Cost Evaluation: Equipment costs

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ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Guide to Nuclear Power Cost Evaluation: Equipment costs by : Kaiser Engineers

Download or read book Guide to Nuclear Power Cost Evaluation: Equipment costs written by Kaiser Engineers and published by . This book was released on 1962 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Modern Surface Organometallic Chemistry

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Publisher : Wiley-VCH
ISBN 13 : 9783527319725
Total Pages : 725 pages
Book Rating : 4.3/5 (197 download)

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Book Synopsis Modern Surface Organometallic Chemistry by : Jean-Marie Basset

Download or read book Modern Surface Organometallic Chemistry written by Jean-Marie Basset and published by Wiley-VCH. This book was released on 2009-08-10 with total page 725 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering everything from the basics to recent applications, this monograph represents an advanced overview of the field. Edited by internationally acclaimed experts respected throughout the community, the book is clearly divided into sections on fundamental and applied surface organometallic chemistry. Backed by numerous examples from the recent literature, this is a key reference for all chemists.

Confronting Poverty in Iraq

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Publisher : World Bank Publications
ISBN 13 : 0821385631
Total Pages : 114 pages
Book Rating : 4.8/5 (213 download)

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Book Synopsis Confronting Poverty in Iraq by : World Bank

Download or read book Confronting Poverty in Iraq written by World Bank and published by World Bank Publications. This book was released on 2011-01-10 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides the most comprehensive and rigorous analysis of Iraqi income and expenditure in several decades. The report makes extensive use of the Iraq Household Socio-Economic Survey, the first nationwide income and expenditure survey since 1988. IHSES data is complemented income and expenditure data from a wide range of other measures of living standards, allowing us to analyze living standards in a holistic way. The analysis presented here was performed with two main goals first, to inform the Government s Poverty Reduction Strategy; and second, to serve as a baseline for future assessments of changes in living standards and the identification of critical issues for deeper examination. Iraqi living standards have two unusual characteristics. First, they have fallen over the past generation. Second, they feature surprisingly little inequality. These characteristics are both rooted in Iraq s recent history of authoritarian government, war, military occupation, insurgency, and civil strife leading to infrastructure destruction and population displacement. There have been few opportunities for individuals to prosper from professional or entrepreneurial activities. Decades of neglected investment have resulted in deterioration of social services and economic infrastructure. Consequently, individuals have lacked capabilities to prosper and an investment climate conducive to prosperity. School enrollment and life expectancy have declined. Extremely low returns to education reflect the combination of poor educational quality and lack of employment opportunities. In terms of economic infrastructure, access to reliable electricity and water, and even access to paved roads are low, are further reflections of decades of neglect. While the upper end of the distribution has been pulled down by a lack of opportunities, the lower end has been supported by direct government provision of food. The Public Distribution System (PDS) provides 85 percent of food needs. While PDS has been useful as a safety net for the poor and the vulnerable, the system is expensive, inefficient, and fiscally risky. Indeed, PDS food rations account for a far greater share of public spending than does education or health. Going forward, Iraq faces two main challenges. First, although Iraq does not have to develop from scratch, it faces a formidable challenge in re-development. Second, a shift by the Government is required from direct provision of basic subsistence toward investment in human capacities. The Government can provide an enabling environment through investments in economic infrastructure and services to business and citizens, thus allowing the population to make productive use of education and their own labor. Both challenges are now being taken up by the Poverty Reduction Strategy, which articulates a detailed set of required actions and outlines priorities for government spending.

Conceptual Modeling for Traditional and Spatio-Temporal Applications

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Publisher : Springer Science & Business Media
ISBN 13 : 354030326X
Total Pages : 475 pages
Book Rating : 4.5/5 (43 download)

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Book Synopsis Conceptual Modeling for Traditional and Spatio-Temporal Applications by : Christine Parent

Download or read book Conceptual Modeling for Traditional and Spatio-Temporal Applications written by Christine Parent and published by Springer Science & Business Media. This book was released on 2006-09-02 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: From environmental management to land planning and geo-marketing, the number of application domains that may greatly benefit from using data enriched with spatio-temporal features is expanding very rapidly. This book shows that a conceptual design approach for spatio-temporal databases is both feasible and easy to apprehend. While providing a firm basis through extensive discussion of traditional data modeling concepts, the major focus of the book is on modeling spatial and temporal information.