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Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1042
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Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1042
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Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 176
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Author: Franklin Fisher
Publisher: CreateSpace
ISBN: 9781478241522
Category :
Languages : en
Pages : 564
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Book Description
This book is an attempt to present under one cover the current state of knowledge concerning the potential lightning effects on aircraft and that means that are available to designers and operators to protect against these effects. The impetus for writing this book springs from two sources- the increased use of nonmetallic materials in the structure of aircraft and the constant trend toward using electronic equipment to handle flight-critical control and navigation function.
Author: S. Blair Hedges
Publisher: OUP Oxford
ISBN: 019160898X
Category : Science
Languages : en
Pages : 1237
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Book Description
The evolutionary history of life includes two primary components: phylogeny and timescale. Phylogeny refers to the branching order (relationships) of species or other taxa within a group and is crucial for understanding the inheritance of traits and for erecting classifications. However, a timescale is equally important because it provides a way to compare phylogeny directly with the evolution of other organisms and with planetary history such as geology, climate, extraterrestrialimpacts, and other features.The Timetree of Life is the first reference book to synthesize the wealth of information relating to the temporal component of phylogenetic trees. In the past, biologists have relied exclusively upon the fossil record to infer an evolutionary timescale. However, recent revolutionary advances in molecular biology have made it possible to not only estimate the relationships of many groups of organisms, but also to estimate their times of divergence with molecular clocks. The routineestimation and utilization of these so-called 'time-trees' could add exciting new dimensions to biology including enhanced opportunities to integrate large molecular data sets with fossil and biogeographic evidence (and thereby foster greater communication between molecular and traditional systematists). Theycould help estimate not only ancestral character states but also evolutionary rates in numerous categories of organismal phenotype; establish more reliable associations between causal historical processes and biological outcomes; develop a universally standardized scheme for biological classifications; and generally promote novel avenues of thought in many arenas of comparative evolutionary biology.This authoritative reference work brings together, for the first time, experts on all major groups of organisms to assemble a timetree of life. The result is a comprehensive resource on evolutionary history which will be an indispensable reference for scientists, educators, and students in the life sciences, earth sciences, and molecular biology. For each major group of organism, a representative is illustrated and a timetree of families and higher taxonomic groups is shown. Basic aspects ofthe evolutionary history of the group, the fossil record, and competing hypotheses of relationships are discussed. Details of the divergence times are presented for each node in the timetree, and primary literature references are included. The book is complemented by an online database(www.timetree.net) which allows researchers to both deposit and retrieve data.
Author: William M. Arkin
Publisher:
ISBN:
Category : Marine accidents
Languages : en
Pages : 110
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Author:
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1562
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Author:
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ISBN:
Category : Government publications
Languages : en
Pages : 932
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Author:
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ISBN:
Category : Periodicals
Languages : en
Pages : 1246
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Author: Suzanne H. Reuben
Publisher: DIANE Publishing
ISBN: 1437934218
Category : Health & Fitness
Languages : en
Pages : 240
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Book Description
Though overall cancer incidence and mortality have continued to decline in recent years, cancer continues to devastate the lives of far too many Americans. In 2009 alone, 1.5 million American men, women, and children were diagnosed with cancer, and 562,000 died from the disease. There is a growing body of evidence linking environmental exposures to cancer. The Pres. Cancer Panel dedicated its 2008¿2009 activities to examining the impact of environmental factors on cancer risk. The Panel considered industrial, occupational, and agricultural exposures as well as exposures related to medical practice, military activities, modern lifestyles, and natural sources. This report presents the Panel¿s recommend. to mitigate or eliminate these barriers. Illus.
Author: Richard D. Brunning
Publisher: Afip
ISBN:
Category : Medical
Languages : en
Pages : 508
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Book Description
