Abundance Profiles PDF Download

Author: Daniel Friedli
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 384

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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 184

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Author: P. Legendre
Publisher: Elsevier
ISBN: 0444538690
Category : Science
Languages : en
Pages : 1007

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Book Description
The book describes and discusses the numerical methods which are successfully being used for analysing ecological data, using a clear and comprehensive approach. These methods are derived from the fields of mathematical physics, parametric and nonparametric statistics, information theory, numerical taxonomy, archaeology, psychometry, sociometry, econometry and others. - An updated, 3rd English edition of the most widely cited book on quantitative analysis of multivariate ecological data - Relates ecological questions to methods of statistical analysis, with a clear description of complex numerical methods - All methods are illustrated by examples from the ecological literature so that ecologists clearly see how to use the methods and approaches in their own research - All calculations are available in R language functions

Author: National Research Council Canada
Publisher: NRC Research Press
ISBN: 9780660190891
Category : Science
Languages : en
Pages : 510

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This publication contains presentations & poster papers of a conference that focussed on the many aspects of astrochemistry related to star formation. Topics covered include: the next generation of telescopes & detectors; studies of fundamental chemical processes both in the lab & in the field; an exploration of the connections between chemistry & physics in star-forming regions; the unique problems of high-mass star formation; the formation of hydrogen; deuterated molecules; molecular depletion; observations & modelling of embedded protostars; accretion disks & circumstellar disks; interstellar dust; and the chemistry, physical conditions, & structure of dark clouds. Includes indexes of subjects, authors, & astronomical objects.

Author: Ryan B. MacDonald
Publisher: Frontiers Media SA
ISBN: 2832520405
Category : Science
Languages : en
Pages : 533

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Book Description

Author: Icko Iben
Publisher: Cambridge University Press
ISBN: 1107016576
Category : Science
Languages : en
Pages : 617

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Book Description
Describes how stars respond to microscopic physics in the advanced stages of their evolution with many numerical examples and illustrations.

Author: Marina I. Arleevskaya
Publisher: Frontiers Media SA
ISBN: 2889459411
Category :
Languages : en
Pages : 723

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Book Description
Recent advances in the understanding of microbiota in health and diseases are presented in this special issue of Frontiers in Immunology and Frontiers in Microbiology as well as their impact on the immune system that can lead to the development of pathologies. Potential perspectives and biomarkers are also addressed. We offer this Research Topic involving 64 articles and 501 authors to discuss recent advances regarding: 1. An overview of the human microbiota and its capacity to interact with the human immune system and metabolic processes, 2. New developments in understanding the immune system’s strategies to respond to infections and escape strategies used by pathogens to counteract such responses, 3. The link between the microbiota and pathology in terms of autoimmunity, allergy, cancers and other diseases.

Author: Jelle Kaastra
Publisher: Springer Science & Business Media
ISBN: 0387788751
Category : Science
Languages : en
Pages : 418

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Book Description
The existence of soft excess emission originating from clusters of galaxies, de ned as em- sion detected below 1 keV in excess over the usual thermal emission from hot intracluster gas (hereafter the ICM) has been claimed since 1996. Soft excesses are particularly - portant to detect because they may (at least partly) be due to thermal emission from the Warm-Hot Intergalactic Medium, where as much as half of the baryons of the Universe could be. They are therefore of fundamental cosmological importance. Soft excess emission has been observed (and has also given rise to controversy) in a number of clusters, mainly raising the following questions: (1) Do clusters really show a soft excess? (2) If so, from what spatial region(s) of the cluster does the soft excess or- inate? (3) Is this excess emission thermal, originating from warm-hot intergalactic gas (at 6 temperatures of?10 K), or non-thermal, in which case several emission mechanisms have been proposed. Interestingly, some of the non-thermal mechanisms suggested to account for soft excess emission can also explain the hard X-ray emission detected in some clusters, for example by RXTE and BeppoSAX (also see Petrosian et al. 2008—Chap. 10, this issue; Rephaeli et al. 2008—Chap. 5, this issue).

Author: Jelle de Plaa
Publisher: Jelle de Plaa
ISBN: 9039344396
Category : Science
Languages : en
Pages : 161

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Book Description
Clusters of galaxies are the biggest objects known in the universe. They consist of large groups of hundreds of galaxies that each contain hundreds of billions of stars. The member galaxies are embedded in a cloud of hot X-ray emitting gas that spans over millions of light years. During the formation of clusters, a large fraction of the chemical elements that supernova explosions produce is ejected from the galaxies into the surrounding hot gas. In this thesis, Jelle de Plaa presents the results of his study of this chemical enrichment of the hot gas. He used observations performed by ESA's XMM-Newton X-ray observatory to measure the abundances of several elements and compared them to supernova-model yields.

Author: International Astronomical Union. Symposium
Publisher: Cambridge University Press
ISBN: 9780521850186
Category : Science
Languages : en
Pages : 544

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Book Description
Explores some of the less well understood physical processes involved in the modeling of stars.