- France’s Choice for Naval Nuclear Propulsion
Why Low-Enriched Uranium Was Chosen |
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- Future War Stories
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- New Scientist SPACE - Breaking News - Earth rocks could have taken life to Titan
check "hard to kill in the dead sea" on cadmus
Read space news and astronomy news. Search articles on the big bang, the universe, black holes and a range of other topics dedicated to space.
astronomy bang big black holes moon news outer shuttle space universe
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Note: http://cadmus.blogspot.com/2004/09/hard-to-kill-in-dead-sea.html
- Paper Planes > Index of All Paper Planes Pages
* Paper Planes index.html * A Brief History of Paper a-brief-history-of-paper.html * A Brief History of Flying a-brief-history-of-flying.html * Paper Folding Basics paper-folding-basics.html * Paper Craft paper-craft.html * Basic Aerodynamics basic-aerodynamics.html * Common Folds common-folds.html * Flights and Launching flights-and-launching.html * Terminology terminology.html * othersites othersites.php * Paper Airplanes Step by step instructions, with illustrations and videos on how to fold all 50 paper airplanes. We don't just show you how to make a paper airplane. We give easy to fo
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- PROPULSIVE SMALL EXPENDABLE DEPLOYER SYSTEM (ProSEDS) SPACE DEMONSTRATION 19980237460.pdf
Abstract The Propulsive Small Expendable Deployer System (ProSEDS) space experiment will demonstrate the use of an electrodynamic tether propulsion system. The flight experiment is a precursor to the more ambitious electrodynamic tether upper stage demonstration mission which will be capable of orbit raising, lowering and inclination changing—all using electrodynamic thrust. ProSEDS, which is planned to fly in 2000, will use the flight-proven Small Expendable Deployer System (SEDS) to deploy a tether (5-km bare wire plus 15-km spectra) from a Delta II upper stage to achieve ∼0.4N drag thrust, thus deorbiting the stage. The experiment will use a predominantly ‘bare’ tether for current collection in lieu of the endmass collector and insulated tether
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- See how your climate could be transformed if carbon emissions continue to rise.
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- Space Spin: Spitzer picks up glow of Universe's first objects <<astronomy>>
New observations from NASA's Spitzer Space Telescope strongly suggest that infrared light detected in a prior study originated from clumps of the very first objects of the Universe. The recent data indicate this patchy light is splattered across the entire sky and comes from clusters of bright, monstrous objects more than 13 billion light-years away. "We are pushing our telescopes to the limit and are tantalizingly close to getting a clear picture of the very first collections of objects," said Dr. Alexander Kashlinsky of NASA's Goddard Space Flight Center, Greenbelt, Md., lead author on two reports to appear in the Astrophysical Journal Letters. "Whatever these objects are, they are intrinsically incredibly bright and very different from anything in existe
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- The End Of The Sun
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- The global ocean circulation on a retrograde rotating earth - V. Kamphuis, S. E. Huisman, and H. A. Dijkstra
Abstract. To understand the three-dimensional ocean circulation patterns that have occurred in past continental geometries, it is crucial to study the role of the present-day continental geometry and surface (wind stress and buoyancy) forcing on the present-day global ocean circulation. This circulation, often referred to as the Conveyor state, is characterised by an Atlantic Meridional Overturning Circulation (MOC) with a deep water formation at northern latitudes and the absence of such a deep water formation in the North Pacific.
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- The War in the Air, by H. G. Wells
The Project Gutenberg EBook of The War in the Air, by Herbert George Wells This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.org Title: The War in the Air Author: Herbert George Wells Release Date: August 10, 2008 [EBook #780] Last Updated: June 2, 2010 Language: English Character set encoding: ASCII *** START OF THIS PROJECT GUTENBERG EBOOK THE WAR IN THE AIR *** Produced by An Anonymous Volunteer, Janet Blenkinship, and David Widger
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- Time and symmetry in models of economic markets Lee Smolin (Submitted on 25 Feb 2009)
These notes discuss several topics in neoclassical economics and alternatives, with an aim of reviewing fundamental issues in modeling economic markets. I start with a brief, non-rigorous summary of the basic Arrow-Debreu model of general equilibrium, as well as its extensions to include time and contingency. I then argue that symmetries due to similarly endowed individuals and similar products are generically broken by the constraints of scarcity, leading to the existence of multiple equilibria. This is followed by an evaluation of the strengths and weaknesses of the model generally. Several of the weaknesses are concerned with the treatments of time and contingency. To address these we discuss a class of agent based models. Another set of issues has to do
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- TIME WITHOUT END: PHYSICS AND BIOLOGY IN AN OPEN UNIVERSE (*)
Freeman J. Dyson Institute for Advanced Studies, Princeton New Jersey 08540 Reviews of Modern Physics, Vol. 51, No. 3, July 1979 (c) 1979 American Physical Society Quantitative estimates are derived for three classes of phenomena that may occur in an open cosmological model of Friedmann type. (1) Normal physical processes taking place with very long time-scales. (2) Biological processes that will result if life adapts itself to low ambient temperatures according to a postulated scaling law. (3) Communication by radio between life forms existing in different parts of the universe. The general conlusion of the analysis is that an open universe need not evolve into a state of permanent quiescence. Life and communication can continue for ever, utilizing a finit
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- V/STOL - WAS IT A GOOD IDEA? By David Hobbs
The concept of producing a practical, winged, aircraft able to use aerodynamic lift for flight, yet capable of Vertical Take Off and Landing (VTOL) has fascinated designers since the dawn of powered flight. Whilst helicopters have achieved it, their fixed wing cousins have not, to anything like the same degree.
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- Vessel of Interest
наблюдаемое судно
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- Weather forecast for Stockholm (Sweden), 20 m. – yr.no
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