Africa and the Discovery of America PDF Download

Author: Leo Wiener
Publisher:
ISBN:
Category : History
Languages : en
Pages : 366

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Author: Laura Garwin
Publisher: University of Chicago Press
ISBN: 0226284166
Category : Science
Languages : en
Pages : 381

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Many of the scientific breakthroughs of the twentieth century were first reported in the journal Nature. A Century of Nature brings together in one volume Nature's greatest hits—reproductions of seminal contributions that changed science and the world, accompanied by essays written by leading scientists (including four Nobel laureates) that provide historical context for each article, explain its insights in graceful, accessible prose, and celebrate the serendipity of discovery and the rewards of searching for needles in haystacks.

Author: A. S. RUSSELL
Publisher:
ISBN: 9781033545744
Category :
Languages : en
Pages : 0

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Author: Michael Bliss
Publisher: University of Toronto Press
ISBN: 1487516746
Category : Medical
Languages : en
Pages : 320

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The discovery of insulin at the University of Toronto in 1921-22 was one of the most dramatic events in the history of the treatment of disease. Insulin was a wonder-drug with ability to bring patients back from the very brink of death, and it was no surprise that in 1923 the Nobel Prize for Medicine was awarded to its discoverers, the Canadian research team of Banting, Best, Collip, and Macleod. In this engaging and award-winning account, historian Michael Bliss recounts the fascinating story behind the discovery of insulin – a story as much filled with fiery confrontation and intense competition as medical dedication and scientific genius. Originally published in 1982 and updated in 1996, The Discovery of Insulin has won the City of Toronto Book Award, the Jason Hannah Medal of the Royal Society of Canada, and the William H. Welch Medal of the American Association for the History of Medicine.

Author: Institute of Medicine
Publisher: National Academies Press
ISBN: 0309262011
Category : Medical
Languages : en
Pages : 159

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In 1996, the Institute of Medicine (IOM) released its report Telemedicine: A Guide to Assessing Telecommunications for Health Care. In that report, the IOM Committee on Evaluating Clinical Applications of Telemedicine found telemedicine is similar in most respects to other technologies for which better evidence of effectiveness is also being demanded. Telemedicine, however, has some special characteristics-shared with information technologies generally-that warrant particular notice from evaluators and decision makers. Since that time, attention to telehealth has continued to grow in both the public and private sectors. Peer-reviewed journals and professional societies are devoted to telehealth, the federal government provides grant funding to promote the use of telehealth, and the private technology industry continues to develop new applications for telehealth. However, barriers remain to the use of telehealth modalities, including issues related to reimbursement, licensure, workforce, and costs. Also, some areas of telehealth have developed a stronger evidence base than others. The Health Resources and Service Administration (HRSA) sponsored the IOM in holding a workshop in Washington, DC, on August 8-9 2012, to examine how the use of telehealth technology can fit into the U.S. health care system. HRSA asked the IOM to focus on the potential for telehealth to serve geographically isolated individuals and extend the reach of scarce resources while also emphasizing the quality and value in the delivery of health care services. This workshop summary discusses the evolution of telehealth since 1996, including the increasing role of the private sector, policies that have promoted or delayed the use of telehealth, and consumer acceptance of telehealth. The Role of Telehealth in an Evolving Health Care Environment: Workshop Summary discusses the current evidence base for telehealth, including available data and gaps in data; discuss how technological developments, including mobile telehealth, electronic intensive care units, remote monitoring, social networking, and wearable devices, in conjunction with the push for electronic health records, is changing the delivery of health care in rural and urban environments. This report also summarizes actions that the U.S. Department of Health and Human Services (HHS) can undertake to further the use of telehealth to improve health care outcomes while controlling costs in the current health care environment.

Author: A. S. Russell
Publisher: Forgotten Books
ISBN: 9780267617326
Category : Psychology
Languages : en
Pages : 870

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Excerpt from Discovery, 1920, Vol. 1: A Monthly Popular Journal of Knowledge Since the supply of phosphorus was limited. And it was urgently needed by the army as a smoke-producing substance, the necessity arose of replacing it by some smoke-producing material which could be stored in appropriate floats on the decks of merchantmen or other vessels, the floats then being lit and thrown overboard when occasion demanded. The late Wing Commander Brock, Commanding Officer of the Royal Naval Experimental Station, Stratford, E devised a mixture which was really a firework com position, modified in such a way, by the addition of resinous and other carbonaceous material, that a dense smoke was produced on burning. This mixture was placed in tin canisters contained in a wooden box, each canister being connected by a fuse to a match composition (suitably protected) on the outside of the box, and which could be fired by friction. Near the top of the sides of the box were a number of small holes, that were plugged by a composition which would easily be blown out by the pressure set up in the box by the gases produced in the burning of the smoke mixture. The boxes were so arranged that they floated in water, the top side uppermost, and all that was necessary, in using them, was to strike the friction tab and then, when it was certain that they had started functioning correctly, throw them overboard. The results obtained were not very satisfactory, however, owing to the difficulty of keeping the boxes watertight, and the smoke-mixture free from moisture. Also, the smoke produced suffered from the same de feets as the fuel-funnel-smoke. There are several chlorides of metals and non metals, such as stannic chloride, antimony penta chloride, silicon tetrachloride, etc., which give a good smoke when decomposed by the moisture of the atmo sphere, Or especially when a fine spray of the liquid is mixed with a fine spray of liquid ammonia; stannic chloride especially gives a very good cloud under such conditions (see English Patent To use these substances, however, they have to be stored in heavy steel cylinders under a considerable pressure of air, in order to force them out as a spray through a syphon tube; the dead weight of the containing-vessels is thus very large in comparison with the weight of smoke producing material. Moreover, the contents of a cylinder are discharged in the short time of 6 - 8 minutes. This method of producing smoke is therefore not very convenient on a large scale, but it has the advantage that smoke can be produced instantly, and in quantity, by the mere turning of a tap. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Author: Hugh Ferriss
Publisher: Courier Corporation
ISBN: 0486136183
Category : Architecture
Languages : en
Pages : 114

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Trained as an architect in the early twentieth century, Hugh Ferriss possessed a vision of form that surpassed the traditional blueprints of his peers—and it showed in his distinctively moody renderings. A master of light and shadow, he managed to capture the spirit of each building with a heightened sense of perspective and design. By the 1920s, he was well on his way to becoming America's greatest architectural draftsman. Ferriss' remarkable style, which influenced generations of builders, is highlighted in this illustrated journey through three decades of American architecture. Accompanied by illuminating text and captions, this collection of sixty of his extraordinary drawings includes: Rockefeller Center, a stunning symbol of modern Art Deco style; California's Shasta Dam, ranked as one of the great civil engineering feats of the world; the Perisphere and Trylon from New York's 1939 World's Fair; Taliesin-in-Arizona, Frank Lloyd Wright's breathtaking winter home; and Denver's Red Rocks Amphitheater, a dramatic structure that incorporates natural elements and rock formations. Plus, there are illustrations of the Empire State Building, the United Nations headquarters, airports, grain elevators, bomb shelters, and more. Architects, draftsmen, and designers of all ages will savor the wonder and imagination in this magnificent volume.

Author: Robert Peele
Publisher:
ISBN:
Category : Mining engineering
Languages : en
Pages : 2548

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Author: United States. Congress. House. Temporary National Economic Committee
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 1840

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Author: United States. Department of the Interior
Publisher:
ISBN:
Category : Natural resources
Languages : en
Pages : 704

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