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Author : Anonim
Publisher : Unknown
Page : 554 pages
File Size : 54,5 Mb
Release : 2002
Category : Airplanes
ISBN : PSU:000050922956
Author : Anonim
Publisher : Unknown
Page : 14 pages
File Size : 50,6 Mb
Release : 1997
Category : Electric propulsion
ISBN : NASA:31769000627540
Author : Gregory Errol Chamitoff,Srinivas Rao Vadali
Publisher : American Institute of Aeronautics and Astronautics Incorporated
Page : 0 pages
File Size : 40,7 Mb
Release : 2021
Category : Manned space flight
ISBN : 1624103995
The purpose of this book is to share collective experience on human spaceflight operations. For the many authors, this is nothing less than a work of passion. They are sharing their life's work with the goal of passing on their experience to the next generation of space engineers, designers, operators, and crew.
Author : Committee on Reusable Launch Vehicle Technology and Test Program,Commission on Engineering and Technical Systems,Division on Engineering and Physical Sciences,National Research Council
Publisher : National Academies Press
Page : 99 pages
File Size : 49,9 Mb
Release : 1996-01-22
Category : Science
ISBN : 9780309588966
The key to opening the use of space to private enterprise and to broader public uses lies in reducing the cost of the transportation to space. More routine, affordable access to space will entail aircraft-like quick turnaround and reliable operations. Currently, the space Shuttle is the only reusable launch vehicle, and even parts of it are expendable while other parts require frequent and extensive refurbishment. NASA's highest priority new activity, the Reusable Launch Vehicle program, is directed toward developing technologies to enable a new generation of space launchers, perhaps but not necessarily with single stage to orbit capability. This book assesses whether the technology development, test and analysis programs in propulsion and materials-related technologies are properly constituted to provide the information required to support a December 1996 decision to build the X-33, a technology demonstrator vehicle; and suggest, as appropriate, necessary changes in these programs to ensure that they will support vehicle feasibility goals.
Author : Nathan Palumbo
Publisher : Unknown
Page : 20 pages
File Size : 40,5 Mb
Release : 2002
Category : Airplanes
ISBN : NASA:31769000642044
Flights of the F-1513/Propulsion Flight Test Fixture (PFTF) with a Cone Drag Experiment (CDE) attached have been accomplished at NASA Dryden Flight Research Center. Mounted underneath the fuselage of an F-15B airplane, the PFTF provides volume for experiment systems and attachment points for propulsion experiments. A unique feature of the PFTF is the incorporation of a six-degree-of-freedom force balance. The force balance mounts between the PFTF and experiment and measures three forces and moments. The CDE has been attached to the force balance for envelope expansion flights. This experiment spatially and inertially simulates a large propulsion test article. This report briefly describes the F-15B airplane, the PFTF, and the force balance. A detailed description of the CDE is provided.
Author : AA.VV.
Publisher : Accademia University Press
Page : 304 pages
File Size : 42,9 Mb
Release : 2020-01-23
Category : Social Science
ISBN : 9788831978781
The time of Carnival represents a “wild” time at the end of winter and pointing to the beginning of a new season. It is characterized by the irruption of border figures, animal masks, characters which recall the world of the dead and which bring within themselves the germ of a vital force, of the energy that produces the reawakening of nature and announces the growth and fertility of the new crops. This wild domain shows itself under the shapes of a contiguity between human and animal: the costumes, the masks, refer to a world in which the characteristics of the human and those of the animal are fused and intertwined. Among these figures, in particular, emerge those of the Wild Man, the human being who takes on animal-like attributes and aspects, and of the Bear, the animal that, more than all the others, gets as close as possible to the human and seems to reflect a deformed image of it. Such symbolic images come from far off times and places to tell a story that belongs to our common origins. The bear assumes attributes and functions alike in very different cultural contexts, such as the Sámi of Finland or North-American hunter-gatherers, and represents a boundary between the world of nature and the human world, between the domain of animals and the difficult construction of humanity: a process continued for centuries, perhaps millennia, and which cannot still be said complete.
Author : Vigor Young
Publisher : AIAA
Page : 606 pages
File Size : 51,7 Mb
Release : 1995
Category : Liquid propellant rockets
ISBN : 160086418X
Annotation Since the invention of the V-2 rocket during World War II, combustion instabilities have been recognized as one of the most difficult problems in the development of liquid propellant rocket engines. This book is the first published in the United States on the subject since NASA's Liquid Rocket Combustion Instability (NASA SP-194) in 1972. In this book, experts cover four major subject areas: engine phenomenology and case studies, fundamental mechanisms of combustion instability, combustion instability analysis, and engine and component testing. Especially noteworthy is the inclusion of technical information from Russia and China--a first.
Author : AA.VV.
Publisher : Accademia University Press
Page : 128 pages
File Size : 45,5 Mb
Release : 2020-01-21
Category : Political Science
ISBN : 9788831978767
Nowadays solitude is everywhere. Increasingly similar to monads, we are losing the ability to build solid connections between us, and to convert our private experience into public matter. What is becoming lost is an «art of translation», the capacity to build bridges between private problems and troubles and common causes, something that may connect people and make them act in accord: that is, politics as an art to «bring us together».The goal of this book is to question, in many different ways, the link between solitude and politics. It is the result of a collective work of young researchers, trying to understand, and to fight, their own solitude and loneliness within the academia. It offers a preliminary interdisciplinary discussion aiming to forge the tools to grasp this strange oxymoron, to better comprehend this simultaneously individual and collective condition.
Author : American Institute of Aeronautics and Astronautics
Publisher : AIAA (American Institute of Aeronautics & Astronautics)
Page : 838 pages
File Size : 47,8 Mb
Release : 1997
Category : Aerodynamics
ISBN : UOM:39015041119093
This volume is the proceedings of the Atmospheric Flight Mechanics Conference, which took place in New Orleans, August 1997. It focuses on the technical progress, issues and challenges associated with atmospheric flight. Technical papers address stability and control, flying qualities (including one session dedicated to pilot-induced oscillations), unsteady and vortex aerodynamics, system and parameter identification, aircraft flight dynamic re-entry and aero assist technologies, and reusable launch vehicles.
Author : G. Bianchi,R. Hodges
Publisher : Unknown
Page : 231 pages
File Size : 51,8 Mb
Release : 2018
Category : Business & Economics
ISBN : 8878148792
Author : Bernard Lazare
Publisher : Jazzybee Verlag
Page : 241 pages
File Size : 52,9 Mb
Release : 2023-11-28
Category : Social Science
ISBN : 9783988680198
This book deals with the origin and development of anti-Judaism and incidentally refers much of the history of Israel to this sentiment. One great cause of antisemitism the author finds in Jewish commercialism. Other causes exist in the exclusiveness, the persistent patriotism and pride of Israel. Jewish influences, in spite of race prejudices have been powerful in the councils of nations. Even Napoleon lent an ear to them, and suspended during one year judicial decisions in behalf of the Jewish usurers of the Rhine provinces. The modern aspects of antisemitism are carefully considered by the author. The instinctive, the legal, the Christian, the Christian-socialist, the metaphysical, as well as the ethnological and national phases are successively taken up. In one chapter the causes of antisemitism are set down, and there and in subsequent chapters make excellent reading. In conclusion the author forecasts the ruin of antisemitism because it carries in itself the germ of destruction. In preparing the way for Socialism and Communism it is laboring at the elimination not only of the economic cause, but also of the religious and ethnic causes to which it owes its own growth.
Author : Martin Tajmar
Publisher : Springer Science & Business Media
Page : 139 pages
File Size : 46,5 Mb
Release : 2012-09-08
Category : Technology & Engineering
ISBN : 9783709105474
Space propulsion systems have a great influence on our ability to travel to other planets or how cheap a satellite can provide TV programs. This book provides an up-to-date overview of all kinds of propulsion systems ranging from classical rocket technology, nuclear propulsion to electric propulsion systems, and further to micro-, propellantless and even breakthrough propulsion, which is a new program under development at NASA. The author shows the limitations of the present concepts and how they could look like in the future. Starting from historical developments, the reader is taken on a journey showing the amazing technology that has been put on hold for decades to be rediscovered in the near future for questions like how we can even reach other stars within a human lifetime. The author is actively involved in advanced propulsion research and contributes with his own experience to many of the presented topics. The book is written for anyone who is interested in how space travel can be revolutionized.
Author : M.L. Williams,Wolfgang Knauss
Publisher : Springer
Page : 0 pages
File Size : 50,5 Mb
Release : 2011-10-19
Category : Science
ISBN : 9401087652
From time to time the International Journal of Fracture has presented matters thought to be of special interest to its readers. In previous special issues (December 1980 and April 1981), Dr H.W. Liu as Guest Editor presented a series of review papers dealing with fatigue processes and characteristics in metals and non-metals. Continuing this policy, which is consistent with our stated objectives, a second review dealing with time depen dence in the fracture process, including the effect of material inertia but essentially excluding very strong shock effects in solids, has been assembled under the generic term "dynamic fracture". We hope that the ensuing state-of-the-art review will yield an instructive and timely product which readers will find useful. To assist us in presenting this subject, we have prevailed upon a well-known worker in dynamic fracture, Dr W.G. Knauss, Professor of Aeronautics and Applied Mechanics, California Institute of Technology to act as Guest Editor for this special double issue. On behalf of the editors and publisher, I wish to express our indebtedness to Professor Knauss and his invited authors for undertaking this special effort.
Author : R B. Langtry
Publisher : Unknown
Page : 128 pages
File Size : 53,8 Mb
Release : 2002
Category : Electronic
ISBN : OCLC:1109662013
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
Page : 30 pages
File Size : 40,5 Mb
Release : 2018-08-20
Category : Electronic
ISBN : 1721527451
Low- or no-flow electron emitters are required for low-power electric thrusters, spacecraft plasma contactors, and electrodynamic tether systems to reduce or eliminate the need for propellant/expellant. Expellant-less neutralizers can improve the viability of very low-power colloid thrusters, field emission electric propulsion devices, ion engines, Hall thrusters, and gridded vacuum arc thrusters. The NASA Glenn Research Center (GRC) is evaluating ferroelectric emission (FEE) cathodes as zero expellant flow rate cathode sources for the applications listed above. At GRC, low voltage (100s to approx. 1500 V) operation of FEE cathodes is examined. Initial experiments, with unipolar, bipolar, and RF burst applied voltage, have produced current pulses 250 to 1000 ns in duration with peak currents of up to 2 A at voltages at or below 1500 V. In particular, FEE cathodes driven by RF burst voltages from 1400 to 2000 V peak to peak, at burst frequencies from 70 to 400 kHz, emitted average current densities from 0.1 to 0.7 A/sq cm. Pulse repeatability as a function of input voltage has been initially established. Reliable emission has been achieved in air background at pressures as high as 10(exp -6) Torr. Kovaleski, Scott D. and Burke, Tom (Technical Monitor) Glenn Research Center NASA/CR-2002-211872, E-13554, NAS 1.26:211872, AIAA Paper 2002-4242