Автор: Rob Walker
Издательство: Random House Publishing Group
Год издания: 2008
isbn: 1400063914
Количество страниц: 304
Язык: english
Формат: PDF
Imagine that you're thirsty. That shouldn't be too hard to do-it's a basic human condition that pretty much everyone, across every culture, has experienced. It is a signal from the body calling for hydration, a fundamental human need. But never mind what you need when you are thirsty. Any casual visit to a grocery store or even a gas station food mart offers a riot of choices; we all know about the awesome variety that contemporary consumer culture offers. What do you want? What are you thirstyfor, exactly?
Автор: David J.Unger
Издательство: Academic Press
Год издания: 1995
isbn: 0486417379
Количество страниц: 300
Язык: english
Формат: PDF
What is particularly valuable about this book, not found in most fracture books, is the consistent way in which groups of problems are treated (eg. all of the various SSY solutions, both new and old, are clearly presented and related to each other). Also, careful attention is paid to the various modes of fracture (I, II and II) and when information from a solution for one mode may or may not be used to infer information in another mode...the book is valuable to the new fracture mechanisms student, since it summarizes and puts in the same unified notation many of the previously-available analytical solutions. However, the books greater value may lie in the great variety of consistently-presented fundamental closed-form crack tip stress and displacement fields...Analytical Fracture Mechanics should prove to be a valuable resource to both the new student and the experienced researcher in fracture mechanics. It is recommended for purchase by all engineering libraries and as a supplement to a standard first of second fracture mechanics course.
Автор: Charles Wankel
Издательство: SAGE Publications
Год издания: 2008
isbn: 1412949726
Количество страниц: 1220
Язык: english
Формат: PDF
21st Century Management provides clear and useful discussion by scholars from around the world of 100 of the key issues and topics that managers are confronting in the 21st century. The structure of discourse for each issue, and important associated perspectives and research, is concisely and meaningfully presented. New technologies, globalization, and associated ethical implications frame many of these issues. The management of 21st century nonprofit, arts, healthcare, sports, and philanthropic organizations are each given chapter length focus. Significant and helpful bibliographic leads for those interested in further researching an issue are provided. This worldwide collaboration includes contributions by leading experts from Australia, Barbados, Canada, Denmark, Finland, France, Germany, India, Ireland, Israel, Italy, Japan, the Netherlands, New Zealand, Singapore, Taiwan, Turkey, the United Kingdom, and the United States.
Автор: Brian Duigan
Издательство: Britannica Educational Publishing
Год издания: 2010
isbn: 161530066X
Количество страниц: 415
Язык: english
Формат: PDF
During the hot summer months of 1787, delegates from the American states met in Philadelphia and created a new framework of government, called the United States Constitution. While the delegates recognized the need for a strong executive to govern the United States, they did not want an all-powerful monarch who might become a tyrant. Instead they created three branches of government—the executive, the legislature and the judiciary—each with specific powers, and each with the power to check and balance the other.
Автор: H.Svi Shapiro, David E.Purpel
Издательство: Lawrence Erlbaum Associates, Publishers
Год издания: 2005
isbn: 080584452X
Количество страниц: 521
Язык: english
Формат: PDF
This volume, like the editions that preceded it, is predicated on the following assumption: Educators must see their work as inextricably linked to conflicts, stresses, and crises of the social world—whether these appear in forms that might be cultural, moral, political, economic, ecological, or spiritual. It is impossible to make sense of what is happening educationally if what is occurring is not placed in the context of the strains, struggles, and contradictions in both our national and global communities. Issues such as the growing administrative control over teachers' lives, allegations about the mediocrity of American schools, the crisis of funding, concern about what is called educational excellence, the impoverishment of increasing numbers of children and adolescents, the influence of the media on young lives, fears about moral degeneration, school violence, bitter contention over the nature of the curriculum and of school knowledge, and widening disparities in educational achievement among ethnic and racial groups all must be seen, at the same time, as both critical issues in American education and as metaphors for the larger human and societal situation.
Автор: Hans G.Seiler, Astrid Sigel, Helmut Sigel
Издательство: Marcel Dekker, Inc.
Год издания: 1994
isbn: 0824790944
Количество страниц: 776
Язык: english
Формат: PDF
Although the documented use of metals in Iatrochemistry by Theophrast B6mbast von Hohenheim (called Paracelsus, 1493-1541) dates back to the first half of the 16tche ntury, the important role of metal ions for all kinds of biological systems-from microorganisms to humans-has only been recognized during this century. Different requirements must be fulfilletod understand the role of a metal ion in a biological system. At first the metal ion must be detected with high specificity and selectivity, and then its quantity must be determined with high accuracy, sometimes at a very low level, in different compartments of the body. However, the proof of the presence of a metal ion alone gives no or only little information about its beneficial or deleterious effects. In order to attribute observed phenomena to a distinct metal ion, it is necessary to understand its interactions with the constituents of the biological system, its uptake, metabolism, and excretion.
Автор: Michael E.O’Hanlon
Издательство: Brookings Institution Press
Год издания: 2004
isbn: 0815764561
Количество страниц: 192
Язык: english
Формат: PDF
Land, sea, and air—those are three environments where wars are waged. That is why the United States, like most countries, has three branches of armed forces: an army, a navy, and an air force. But with the onrush of technology, a new battlefield looms: outer space. So far, no nation stations weapons in space or deploys effective weapons on Earth with the intended purpose of threatening satellites. In the jargon that Mike O’Hanlon understands so well (and, mercifully, avoids in his own prolific writing), while space is not “weaponized” it is militarized. Today the U.S. Department of Defense uses space assets far more than ever before. Satellites, employed primarily in the cold war for strategic communications and for nuclear targeting and arms control monitoring, are now very much the instrument of the tactical warfighter.
Автор: Alexander E.Gates, David Ritchie
Издательство: Facts on File
Год издания: 2007
isbn: 0816063028
Количество страниц: 365
Язык: english
Формат: PDF
The Earth is a sphere that is flattened at the poles and bulging at the equator. Internally, it is like a hard-boiled egg. In the center, instead of a yolk, it has a core. The core is composed of iron-nickel and contains an inner core that is solid and an outer core that is liquid. The spinning of the Earth causes the two to interact as a self-exciting dynamo that gives Earth its strong magnetic field. The egg white is equivalent to the Earth’s mantle, which encases the core. The mantle is composed of dense minerals that are rich in iron and magnesium. It has several layers reflecting different minerals and mechanical properties. The shell of the egg is equivalent to the Earth’s crust, a thin layer of light rock upon which humans live. Unlike the shell, which is uniform, there are two types of crust. Thin, dense, young crust is pulled toward the center of the Earth by gravity and sinks down, whereas thick, light, old crust floats higher. The deeper crust is covered by oceans and called oceanic crust, whereas the lighter crust forms the continents and is called continental crust. The concept of isostasy is the balance between them.
Автор: Hermann J.Heipieper
Издательство: Springer
Год издания: 2007
isbn: 1402056915
Количество страниц: 156
Язык: english
Формат: PDF
Environmental biotechnology, which was in its infancy in the early 80's, has evolved thanks to the revolution brought about by molecular biology. Multiple successes in the biological cleanup of civil and industrial wastewater and of hydrocarbon soil pollution, demonstrate the vast power of clean technologies. In addition, the buildup of information on the activities of microorganisms as catalysts in all sorts of natural, industrial and animal environments has flourished. There is a continuing realization of the critical role of microbial processes in biological, industrial and geological systems.
Автор: Chiang S.Jao
Издательство: Intech
Год издания: 2010
isbn: 9537619648
Количество страниц: 420
Язык: english
Формат: PDF
Decision support systems (DSS) have evolved over the past four decades from theoretical concepts into real world computerized applications. DSS architecture contains three key components: a knowledge base, a computerized model, and a user interface. DSS simulate cognitive decision-making functions of humans based on artificial intelligence methodologies (including expert systems, data mining, machine learning, connectionism, logistical reasoning, etc.) in order to perform decision support functions. The applications of DSS cover many domains, ranging from aviation monitoring, transportation safety, clinical diagnosis, weather forecast, business management, to internet search strategy. By combining knowledge bases with inference rules, DSS are able to provide suggestions to end users to improve decisions and outcomes.
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