ON AN ARTIFICIAL EARTH

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Trajectories Of Artificial Celestial Bodies As Determined From Observations Trajectoires Des Corps Celestes Artificiels D Termin Es D Apr S Les Observations

Author : J. Kovalevsky
ISBN : 9783642493263
Genre : Technology & Engineering
File Size : 49.25 MB
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In May 1962 the International Union of Theoretical and Applied Mechanics (IUTAM) organized a symposium in Paris on the theory of the movement of the Earth's artificial satellites designated to confront the results of the first spatial experiences with the mechanical point of view. The papers submitted during this meeting have been published in 1963 in a collection entitled "Dynamics of Satellites" by Springer Verlag. During the last three years the importance of studies pertaining to the dynamics of artificial satellites has continued to increase, and many results due to observations have led to a deeper knowledge of the field of forces in which these objects move, particularly the field of gravitation of the Earth, the forces due to pressure of radiation, friction of the atmosphere, etc . . . A new symposium seemed therefore suitable to determine these recent advances. However, this time it appeared appropriate to consider it more from the point of view of the interpretation obtained from the results of observations (determination of orbits and forces existing) than from the point of view of the theory of motion. For this reason the complete title of the second symposium is as follows: "Trajectories of Artificial Celestial Bodies, as Determined from Observations".
Category: Technology & Engineering

Dynamics Of Comets And Asteroids And Their Role In Earth History

Author : Shin Yabushita
ISBN : 9789401713214
Genre : Science
File Size : 80.12 MB
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The last decade of this century has seen a renewed interest in the dynamics and physics of the small bodies of the Solar System, Asteroids, Comets and Meteors. New observational evidences such as the discovery of the Edgeworth-Kuiper belt, refined numerical tools such as the symplectic integrators, analytical tools such as semi-numerical perturbation algorithms and in general a better understanding of the dynamics of Hamiltonian systems, all these factors have converged to make possible and worthwhile the study, over very long time spans, of these "minor" objects. Also the public, the media and even some political assell}blies have become aware that these "minor" objects of our planetary environnement could become deadly weapons. Apparently they did have a role in Earth history and a role more ominous than "predicting" defeat (or victory, why not?) to batches of credulous rulers. Remembering what may have happened to the dinosaurs but keeping all the discretion necessary to avoid creating irrational scares, it may not be unwise or irrelevant to improve our knowledge of the physics and dynamics of these objects and to study in particular their interactions with our planet.
Category: Science

The Doomsday Lobby

Author : James T. Bennett
ISBN : 1441966854
Genre : Science
File Size : 39.91 MB
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Federal patronage of science was never contemplated by the framers of the Constitution, but they did seek to “promote the Progress of Science and useful Art” by granting inventors patent rights. However, direct subvention to scientists and scientific organizations was not considered appropriate activity of the central government. In the 19th Century, American science was funded almost entirely through private investors. Since WWII, however, the federal government has become the primary patron of American science. From the race-to-space in the 1950s to current furor over global warming, Bennett traces the subtle and not-so-subtle ways in which government has co-opted scientific research and reinforced a culture in which challengers to proscribed wisdom are frozen out. Citing original documents and media reports, Bennett offers a compelling, entertaining, and thought-provoking perspective on political influence on scientific research and its implications for a democratic society. "During the Nineteenth Century, almost entirely on private funding, American science grew from practically nothing to world class. Now, however, over fifty percent of American science is funded by the federal government. Dr. Bennett traces the path, "crisis" after "crisis," by which American science became practically an arm of the federal government. His tale is a cautionary one, warning against future "crisis mongers" who would extend the government's already majority control of American science even further. His warning is a timely one, and it should be heeded." Joseph P. Martino, author of Science Funding: Politics and Porkbarrel "Bennett's latest book offers a challenging interpretation of the rise of the American federal science establishment since World War II. Focusing primarily on the growth of the space program, Bennett argues that crisis, real or imagined, is the source of state power and state funding for science. The Doomsday Lobby offers what no doubt will be viewed as a controversial contribution to the history of American science policy, and more broadly to an understanding of the role of the state in society." James D. Savage, Professor of Politics, University of Virginia, and author of Funding Science in America
Category: Science

Epic Rivalry

Author : Von Hardesty
ISBN : 9781426202094
Genre : History
File Size : 71.35 MB
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When Neil Armstrong and Buzz Aldrin walked on the moon in 1969, they personified an almost unimaginable feat—the incredibly complex task of sending humans safely to another celestial body. This extraordinary odyssey, which grew from the rivalry between the United States and the Soviet Union during the Cold War, was galvanized by the Sputnik launch in 1957. To mark the fiftieth anniversary of Sputnik, National Geographic recaptures this gripping moment in the human experience with a lively and compelling new account. Written by Smithsonian curator Von Hardesty and researcher Gene Eisman, Epic Rivalry tells the story from both the American and the Russian points of view, and shows how each space-faring nation played a vital role in stimulating the work of the other. Scores of rare, unpublished, and powerful photographs recall the urgency and technical creativity of both nations' efforts. The authors recreate in vivid detail the "parallel universes" of the two space exploration programs, with visionaries Wernher von Braun and Sergei Korolev and political leaders John F. Kennedy and Nikita Khrushchev at the epicenters. The conflict between countries, and the tense drama of their independent progress, unfolds in vivid prose. Approaching its subject from a uniquely balanced perspective, this important new narrative chronicles the epic race to the moon and back as it has never been told before—and captures the interest of casual browsers and science, space, and history enthusiasts alike.
Category: History

Academic Press Dictionary Of Science And Technology

Author : Christopher G. Morris
ISBN : 0122004000
Genre : Computers
File Size : 44.61 MB
Format : PDF
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Over 125,000 entries cover 124 scientific and technological fields, including acoustical engineering, cartography graphic arts, microbiology, organic chemistry, radiology, and zoology
Category: Computers