354
354
Feb 3, 2011
02/11
by
NASA; Pennsylvania State Univ
movies
eye 354
favorite 1
comment 0
(June 25, 1993) Episode 5 of What’s in the News, Space looks at the teamwork needed to launch a human space mission. This program is intended for grades 4-7. To license this film and get a higher quality version for broadcast/film purposes, contact A/V Geeks LLC .
Topics: NASA, space missions
433
433
movies
eye 433
favorite 0
comment 0
This NASA video segment explains how spacesuits keep astronauts safe while they are in space. Learn about different components of a spacesuit and the importance of each component.
Topics: spacesuits, astronauts, safety, space missions
644
644
movies
eye 644
favorite 0
comment 0
This NASA video segment looks at radiation in space and on Earth. Learn more about two types of radiation and how NASA engineers are developing better shielding material to protect astronauts during long missions in space.
Topics: radiation, astronauts, missions, shielding, earth, space missions
630
630
movies
eye 630
favorite 2
comment 0
In this NASA video segment learn how household tools have been used in space missions. Find out more about the use of cordless, power tools to enable astronauts to perform tasks in space like tightening screws and collecting moon rocks.
Topics: power tools, cordless, space missions, astronauts, space
288
288
Jul 6, 2010
07/10
by
ROMANYUK, L. I.; SLOBODYAN, V. M
texts
eye 288
favorite 0
comment 0
LOW FREQUENCY OSCILLATIONS WHICH DEVELOP SIMILAR TO THE LOW FREQUENCY OSCILLATIONS IN A PENNING DISCHARGE WITH A HOT CATHODE WERE INVESTIGATED IN THE ION SOURCE OF THE U-120 CYCLOTRON. IT WAS FOUND THAT FOR A CYCLOTRON WITH A WORKING MAGNETIC FIELD INTENSITY, AND GAS FLOW RATE, THERE ARE INTENSE OSCILLATIONS IN A DISCHARGE, RESULTING IN ALMOST 100% MODULATION OF THE PLASMA DENSITY. IT IS CONCLUDED THAT OSCILLATIONS, OCCURING IN THE ION SOURCE PLASMA OF A CYCLOTRON, HAVE CONSIDERABLE EFFECT ON...
Topics: FRENCH SPACE PROGRAM, INTERNATIONAL COOPERATION, SPACE MISSIONS
269
269
Jun 12, 2011
06/11
by
Lorenzini, E. C.; Shapiro, I. I.; Cosmo, M. L.; Ashenberg, J.; Parzianello, G.; Iafolla, V.; Nozzoli, S
texts
eye 269
favorite 0
comment 0
We discuss specific, recent advances in the analysis of an experiment to test the Equivalence Principle (EP) in free fall. A differential accelerometer detector with two proof masses of different materials free falls inside an evacuated capsule previously released from a stratospheric balloon. The detector spins slowly about its horizontal axis during the fall. An EP violation signal (if present) will manifest itself at the rotational frequency of the detector. The detector operates in a quiet...
Topics: FUNCTIONAL ANALYSIS, LINGUISTICS, RISK, SPACE MISSIONS, THREADS
Abstract — At the end of the 60’s with the beginning of the space missions it was observed, that once the airships were sent into space and when they entered at the atmosphere, they presented an increase at the wear resistance on the structure of the space shuttles. It was concluded that the low temperature would have influenced in such changes. Over the year’s liquid nitrogen, gaseous nitrogen, helium and dry ice were used on metals and tool that were submitted to high wear and fatigue...
Topics: space missions, microstructural changes, ANNOVA, SAE 64.
156
156
Mar 5, 2009
03/09
by
NASA LaRC Office of Education
movies
eye 156
favorite 0
comment 0
First segment of NASA Destination Tomorrow episode 18 describing the different parts of NASA missions to prepare for the exploration of space.
Topics: NASA Destination Tomorrow, Space Missions, Episode 18, DT18
Source: http://nasa.ibiblio.org/details.php?videoid=6501&start=0&subject=Exploration-Systems
339
339
Jun 12, 2011
06/11
by
Farr, Rebecca A.; Wiley, John T.; Vitarius, Patric
texts
eye 339
favorite 0
comment 0
This paper documents acoustics environments data collected during liquid oxygen- ethanol hot-fire rocket testing at NASA Marshall Space Flight Center in November- December 2003. The test program was conducted during development testing of the RS-88 development engine thrust chamber assembly in support of the Orbital Space Plane Crew Escape System Propulsion Program Pad Abort Demonstrator. In addition to induced environments analysis support, coincident data collected using other sensors and...
Topics: SOLAR ARRAYS, LENSES, PHOTOVOLTAIC CELLS, CONCENTRATORS, SPACE MISSIONS, HARDWARE
The proceedings of a seminar on the economic aspects of the space shuttle system are presented. Emphasis was placed on the problems of economic analysis of large scale public investments, the state of the art of cost estimation, the statistical data base for estimating costs of new technological systems, and the role of the main economic parameters affecting the results of the analyses. An explanation of the system components of a space program and the present choice of launch vehicles,...
Topics: NASA Technical Reports Server (NTRS), COST ANALYSIS, SPACE MISSIONS, SPACE SHUTTLES, SPACECRAFT...
673
673
Jun 12, 2011
06/11
by
Hoskins, W. Andrew; Schneider, Tod; Homiak, Daniel; Cassady, R. Joseph; Kerslake, Tom; Peterson, Todd; Ferguson, Dale; Snyder, Dave; Mikellides, Ioannis; Jongeward, Gary
texts
eye 673
favorite 0
comment 0
The sta:us of development of a Direct Drive Ha Thruster System is presented. 13 the first part. a s:udy of the impacts to spacecraft systems and mass benefits of a direct-drive architecture is reviewed. The study initially examines four cases of SPT-100 and BPT-4000 Hall thrusters used for north-south station keeping on an EXPRESS-like geosynchronous spacecraft and for primary propulsion for a Deep Space- 1 based science spacecraft. The study is also extended the impact of direct drive on orbit...
Topics: SPACE MISSIONS, REQUIREMENTS, SCHEDULING, ASTRONAUTS, COST REDUCTION, SCHEDULES, HYPOTHESES, ROBOTS
230
230
Jun 12, 2011
06/11
by
Kharkovsky, S.; Hepburn, F.; Walker, J.; Zoughi, R
texts
eye 230
favorite 0
comment 0
The Space Shuttle Columbia's catastrophic failure has been attributed to a piece of external tank SOFI (Spray On Foam Insulation) striking the left wing of the orbiter causing significant damage to some of the reinforced carbon/carbon leading edge wing panels. Subsequently, several nondestructive testing (NDT) techniques have been considered for inspecting the external tank. One such method involves using millimeter waves which have been shown to easily penetrate through the foam and provide...
Topics: ROBOTICS, ARID LANDS, EXOBIOLOGY, HABITATS, SURVEYS, LIFE SCIENCES, SPACE MISSIONS
317
317
May 31, 2011
05/11
by
Liu, H. S.; Kolenkiewicz, R.; Wade, C., Jr
texts
eye 317
favorite 0
comment 0
The mismatch between fossil isotopic data and climate models known as the cool-tropic paradox implies that either the data are flawed or we understand very little about the climate models of greenhouse warming. Here we question the validity of the climate models on the scientific background of orbital noise in the Earth system. Our study shows that the insolation pulsation induced by orbital noise is the common cause of climate change and atmospheric concentrations of carbon dioxide and...
Topics: MARKETING, DATA TRANSMISSION, MINING, COMMERCE, TRANSMISSION LINES, SPACE MISSIONS, ORGANIZATIONS
549
549
May 31, 2011
05/11
by
Knauss, W. G.; Gonzalez, Lui
texts
eye 549
favorite 1
comment 0
Composite materials provide well-known advantages for space and aeronautical applications in terms of strength and rigidity to weight ratios and other mechanical properties. As a consequence, their use has experienced a constant increase in the past decades and it is anticipated that this trend will be maintained in the near future. At the same time, being these materials relatively new compared to metals, and having failure characteristics completely different from them, their damage growth...
Topics: COST ANALYSIS, ENGINEERING MANAGEMENT, SPACE MISSIONS, REGRESSION ANALYSIS, TIME CONSTANT
391
391
May 29, 2011
05/11
by
Betts, J. F.; Follet, J. I.; Kelly, J. J.; Thomas, R. H
texts
eye 391
favorite 0
comment 0
A new bias flow impedance model is developed for perforated plates from basic principles using as little empiricisms as possible. A quality experimental database was used to determine the predictive validity of the model. Results show that the model performs better for higher (15%) rather than lower (5%) percent open area (POA) samples. Based on the least squares ratio of numerical vs. experimental results, model predictions were on average within 20% and 30% for the higher and lower (POA),...
Topics: EDUCATION, LOW COST, NASA PROGRAMS, MESSAGES, TARGETS, RELATIONSHIPS, SPACE MISSIONS
2,615
2.6K
May 31, 2011
05/11
by
NON
texts
eye 2,615
favorite 5
comment 0
Deconditioning is an integrated physiological response of the body to a reduction in metabolic rate; that is, to a reduction in energy use or in exercise level. While it may involve assumption of a horizontal body position, it certainly perturbs bodily homeostasis - at least temporarily. The reduction in physical activity that causes deconditioning is often associated with an increase in the time spent, for whatever reason, in a sitting or horizontal position. As a result, orthostatic factors...
Topics: SPACE MISSIONS, OPERATIONS, PROCEDURES, ASSESSMENTS, COST REDUCTION, ORGANIZATIONS, RISK, SHAPES,...
280
280
Jun 13, 2011
06/11
by
Ghosn, Louis J.; Min, James B.; Raj, Sai V.; Lerch, Bradley A.; Holland, Frederic A., Jr
texts
eye 280
favorite 0
comment 0
The goal of this project at the NASA Glenn Research Center is to provide fan materials that are safer, weigh less, and cost less than the currently used titanium alloy or polymer matrix composite fans. The proposed material system is a sandwich fan construction made up of thin solid face sheets and a lightweight metal foam core. The stiffness of the sandwich structure is increased by separating the two face sheets by the foam layer. The resulting structure has a high stiffness and lighter...
Topics: THIN FILMS, SOLAR CELLS, TECHNOLOGY UTILIZATION, FABRICATION, SPACE MISSIONS, CRYSTALLINITY,...
207
207
Aug 2, 2010
08/10
by
Reifer, Donald J
texts
eye 207
favorite 0
comment 0
The lessons learned and experience gleaned are described by those who have started to implement the reuse metrics and measurement framework used in controlling the development of common avionics and software for its affiliated aircraft programs. The framework was developed to permit the measurement of the long term cost/benefits resulting from the creation and use of Reusable Software Objects (RSOs). The framework also monitors the efficiency and effectiveness of the Software Reuse Library...
Topics: CONFERENCES, HANDBOOKS, SPACE MISSIONS, TETHERING, TETHERLINES, AERODYNAMICS, GRAVITY WAVES,...
360
360
Jul 5, 2010
07/10
by
RAUCH, J
texts
eye 360
favorite 0
comment 0
THE ACOUSTIC PRINCIPLES ARE PRESENTED FOR ATTENUATING AUTOMOBILE ENGINE NOISE. THE VARIOUS ASPECTS OF SOUNDPROOFING EXHAUST NOISE ARE DISCUSSED, ALONG WITH THE MEANS FOR LOW PITCH SOUND ABSORPTION. A TERMINAL REFLECTION MUFFLER SYSTEM FOR TOTAL NOISE SUPPRESSION IS DESCRIBED. AN ADMITTANCE TYPE MUFFLER IS ALSO CONSIDERED, AND THE REQUISITE DYNAMIC AND ACOUSTIC CONDITIONS FOR ITS USE ARE DETERMINED. DIFFERENT MATERIALS ARE PROPOSED FOR USE AS SOUND ABSORBERS AND THE CASE OF ACOUSTIC...
Topics: CLOUDS (METEOROLOGY), MESOSPHERE, NOCTILUCENT CLOUDS, GROUND STATIONS, SPACE MISSIONS, VISUAL...
200
200
Jun 2, 2011
06/11
by
Spirkovska, Lilly; Lodha, Suresh K
texts
eye 200
favorite 0
comment 0
Faulty decision making due to inaccurate or incomplete awareness of the situation tends to be the prevailing cause of fatal general aviation accidents. Of these accidents, loss of weather situational awareness accounts for the largest number of fatalities. We describe a method for improving weather situational awareness through the support of a contextaware,domain and task knowledgeable, personalized and adaptive assistant. The assistant automatically monitors weather reports for the pilot's...
Topics: LIFE SUPPORT SYSTEMS, MASS, MISSION PLANNING, MANNED SPACE FLIGHT, SPACE MISSIONS
248
248
May 31, 2011
05/11
by
Pohorille, Andrew; Wilson, Michael A.; Chipot, Christoph
texts
eye 248
favorite 0
comment 0
Protocells had to transport ions and organic matter across membranes separating the interior of the cell from the environment, capture and utilize energy and transduce environmental signals. In a series of detailed, molecular-level computer simulations we show how these peptides in contact with membranes can acquire ordered structures and functions. We have investigated the stability of a simple alpha-helical peptide containing Leucine (L) and Serine (S) of the form (LSLLLSL)3 in a model...
Topics: PROPULSION, SIMULATION, THRUST, ORBITS, TRAJECTORIES, SPECIFIC IMPULSE, SPACE MISSIONS, CONTROL...
279
279
May 22, 2011
05/11
by
Shaw, Benjamin D.; Aharon, Israel; Gage, James W.; Jenkins, Andrew J.; Kahoe, Thomas J
texts
eye 279
favorite 0
comment 0
This research focuses on the combustion of binary miscible droplets initially in the mm size range. Experiments are performed using the NASA Lewis 2.2 sec drop tower in Cleveland, Ohio, where mixtures of alkanes and/or alcohols are studied. The fuel components are selected to have significantly different volatilities. Initial oxygen mole fractions from about 0.15-0.5 and initial pressures from 0.2-2 atm are employed. Different inerts are used (He, CO2, Ar, N2) to change burning rates and...
Topics: AEROSPACE ENGINEERING, ARTIFICIAL SATELLITES, SPACE MISSIONS, TRIBOLOGY, INDUSTRIES, LUBRICATION,...
187
187
May 31, 2011
05/11
by
Duval, Walter M. B
texts
eye 187
favorite 0
comment 0
Excitation of two miscible-viscous liquids inside a bounded enclosure in a microgravity environment has shown the evolution of quasi-stationary waves of various modes for a range of parameters. We examine computationally the nonlinear dynamics of the system as the interface breakup and bifurcates to resonance structures typified by the Rayleigh-Taylor instability mechanism. Results show that when the mean steady field is much smaller than the amplitude of the sinusoidal excitation, the system...
Topics: PROJECT MANAGEMENT, DECISION MAKING, ENVIRONMENTAL RESEARCH SATELLITES, SPACE MISSIONS, NAVY,...
427
427
Jul 11, 2010
07/10
by
Richards, L. G.; Jacobson, I. D
texts
eye 427
favorite 0
comment 0
As part of a larger effort to assess passenger comfort in aircraft, two questionnaires were administered: one to ground-based respondents; the other to passengers in flight. Respondents indicated the importance of various factors influencing their satisfaction with a trip, the perceived importance of various physical factors in determining their level of comfort, and the ease of time spent performing activities in flight. The in-flight sample also provided a rating of their level of comfort and...
Topics: CELESTIAL MECHANICS, COMETS, SPACE MISSIONS, SPACE RENDEZVOUS, ASTROPHYSICS, HYPERBOLIC...
302
302
May 31, 2011
05/11
by
MacKay, John S.; Weber, Richard J
texts
eye 302
favorite 0
comment 0
Charts relating the stage propellant fractions are given for two-and three-stage rockets launching payloads into nominal low-altitude circular orbits about the earth. A simple method is described for extending these data to higher orbit or escape missions. Various combinations of stages using RP - liquid-oxygen and hydrogen - liquid-oxygen propellants are considered. However, the results can be generalized with little error to any other propellant combination.Charts relating the stage...
Topics: LAUNCH DATES, SPACE MISSIONS, DEEP SPACE, HISTORIES, SPACE EXPLORATION, ROBOTICS, SPACE PROBES
261
261
Aug 2, 2010
08/10
by
Tortorelli, Victor J.; Hergenrother, P. M.; Connell, J. W
texts
eye 261
favorite 0
comment 0
Polyphenyl quinoxalines (PPQs) are an important family of high performance polymers that offer good chemical and thermal stability coupled with excellent mechanical properties. These aromatic heterocyclic polymers are potentially useful as films, coatings, adhesives, and composite materials that demand stability in harsh environments. Our approach was to prepare PPQs with pendent siloxane groups using the appropriate chemistry and then evaluate these polymers before and after exposure to...
Topics: ARCHITECTURE (COMPUTERS), MISSION PLANNING, SPACE EXPLORATION, SPACE MISSIONS, BIAS, DECISION...
169
169
May 31, 2011
05/11
by
Mingo, N.; Yang, Liu; Han, Ji
texts
eye 169
favorite 0
comment 0
The problem addressed is force on an impurity due to electric current. In order to determine the size and direction of the force, as well as its dependence on the voltage, LCAO (Linear Combination of Atomic Orbitals) and the Green's Function approach were implemented. The resultant induced mean force was directed outwards in addition to a smaller component in the electron flow direction. At low bias, force is larger for larger radius, and crosses over the opposite trend when increasing the...
Topics: SPACE EXPLORATION, PROJECT MANAGEMENT, EDUCATION, EXPLORER SATELLITES, SPACE MISSIONS, SPACE...
On July 19, the commander of U.S. Strategic Command signed the implementation directive giving the commander of the Joint Functional Component Command-Space (JFCC-Space) the authority and responsibility to command and control almost all Department of Defense Space assets worldwide. This is the first time that almost all of Space was centrally controlled by one command and commander. For the past couple of years, the 14th Air Force Space and Air Operations Center has transformed into a Joint...
Topics: DTIC Archive, *COMMAND AN, SPACE MISSIONS, RECONNAISSANCE, MONITORING, SITUATIONAL AWARENESS,...
238
238
Jul 12, 2010
07/10
by
Connor, H. F.; Duty, D. M.; Richey, J. D
texts
eye 238
favorite 0
comment 0
No Abstract Available
Topics: ASTRONOMY, ONBOARD EQUIPMENT, SPACE MISSIONS, SPACE SHUTTLES, DATA ACQUISITION, EQUIPMENT...
355
355
Aug 1, 2010
08/10
by
Jacobs, P. A
texts
eye 355
favorite 0
comment 0
A finite volume Navier-Stokes code was used to simulate the shock reflection and nozzle starting processes in an axisymmetric shock tube and a high Mach number nozzle. The simulated nozzle starting processes were found to match the classical quasi-1-D theory and some features of the experimental measurements. The shock reflection simulation illustrated a new mechanism for the driver gas contamination of the stagnated test gas.
Topics: MISSION PLANNING, NASA SPACE PROGRAMS, SELECTION, SPACEBORNE EXPERIMENTS, EXPERIMENT DESIGN, SPACE...
744
744
May 29, 2011
05/11
by
Gnoffo, Peter A
texts
eye 744
favorite 0
comment 0
A series of experiments to measure pressure and heating for code validation involving hypersonic, laminar, separated flows was conducted at the Calspan-University at Buffalo Research Center (CUBRC) in the Large Energy National Shock (LENS) tunnel. The experimental data serves as a focus for a code validation session but are not available to the authors until the conclusion of this session. The first set of experiments considered here involve Mach 9.5 and Mach 11.3 N, flow over a hollow...
Topics: ION ENGINES, ION PROPULSION, PLUMES, TECHNOLOGY UTILIZATION, EXPERIMENTATION, PLASMAS (PHYSICS),...
212
212
May 23, 2011
05/11
by
Weaver, M. L.; Noebe, R. D.; Kaufman, M. J
texts
eye 212
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comment 0
Alloys based on the intermetallic compound NiAl are considered potential replacements for Ni and Co-based superalloys in high temperature structural applications due to their excellent oxidation resistance, low densities, high thermal conductivities, and increased melting points. Unfortunately, NiAl exhibits low tensile ductility at room temperature and low strengths at elevated temperatures which have combined to hinder its development. Recent efforts, have revealed that NiAl in the presence...
Topics: NASA PROGRAMS, HAZARDS, EXPOSURE, TOXICOLOGY, CONTAMINANTS, SPACE MISSIONS, SPACE STATIONS,...
321
321
Jul 12, 2010
07/10
by
Vonnegut, B.; Vaughan, O. H., Jr.; Brook, M
texts
eye 321
favorite 0
comment 0
Results of the Nighttime/Daytime Optical Survey of Lightning (NOSL) experiments done on the STS-2 and STS-4 flights are covered. During these two flights of the Space Shuttle Columbia, the astronaut teams of J. Engle and R. Truly, and K. Mattingly II and H. Hartsfield took motion pictures of thunderstorms with a 16 mm cine camera. Film taken during daylight showed interesting thunderstorm cloud formations, where individual frames taken tens of seconds apart, when viewed as stereo pairs,...
Topics: SPACE MISSIONS, SPACE STATIONS, USER REQUIREMENTS, ECONOMIC FACTORS, MANNED SPACECRAFT, SYSTEMS...
380
380
Jun 21, 2010
06/10
by
Hibbard, R. R
texts
eye 380
favorite 0
comment 0
Technology assessment of research in biological and medical engineering including problem areas
Topics: MARINER SPACECRAFT, POSTFLIGHT ANALYSIS, SPACE MISSIONS, DATA TRANSMISSION, MARINER PROGRAM,...
846
846
Jul 12, 2010
07/10
by
Paup, J. W
texts
eye 846
favorite 0
comment 0
No Abstract Available
Topics: RADAR EQUIPMENT, SPACE MISSIONS, SPACE RENDEZVOUS, ELECTRONIC EQUIPMENT, SPACECRAFT GUIDANCE,...
219
219
Jul 26, 2010
07/10
by
Mason, Matthew T
texts
eye 219
favorite 0
comment 0
Some robot tasks require manipulation of objects that may be touching other fixed objects. The effects of friction and kinematic constraint must be anticipated, and may even be exploited to accomplish the task. An example task, a dynamic analysis, and appropriate effector motions are presented. The goal is to move a rectangular block along a wall, so that one side of the block maintains contact with the wall. Two solutions that push the block along the wall are discussed.
Topics: EQUIPMENT SPECIFICATIONS, ROBOTICS, ROBOTS, SPACE MISSIONS, STRUCTURAL DESIGN, WEIGHTLESSNESS,...
426
426
Jun 2, 2011
06/11
by
VanDresar, Neil T.; Siegwarth, James D
texts
eye 426
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comment 0
The transient behavior of a small scale cryogenic transfer line was investigated during chilldown to cryogenic temperatures. The vacuum-jacketed apparatus consisted of a vertical tube followed by a near horizontal tube. The apparatus was equipped with view ports in the near horizontal section to allow visual observation of the flow patterns. Wall temperatures were measured at various locations along the length of the transfer line. Each test was conducted at a constant liquid volumetric...
Topics: LIFE SUPPORT SYSTEMS, WEIGHT (MASS), SPACE MISSIONS, SYSTEMS INTEGRATION, COSTS, HARDWARE,...
335
335
May 29, 2011
05/11
by
NON
texts
eye 335
favorite 0
comment 0
This report lists reports, articles and other documents recently announced in the NASA STI Database.
Topics: ELECTRIC PROPULSION, RESEARCH, FEASIBILITY, TETHERLINES, SOLAR SYSTEM, PLASMA ENGINES, SPACE...
252
252
Jun 20, 2010
06/10
by
Buyanov, P. V.; Terentyev, V. G
texts
eye 252
favorite 0
comment 0
Medical selection of spacecraft crews for long duration space missions
Topics: AEROSPACE MEDICINE, HEALTH, PERSONNEL SELECTION, SPACE MISSIONS, SPACECREWS, AEROSPACE MEDICINE,...
1,875
1.9K
Jun 26, 2010
06/10
by
NON
texts
eye 1,875
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comment 0
Orbiting Lunar Station feasibility and definition - Configuration and systems analysis
Topics: COMMUNICATION SATELLITES, SPACE MISSIONS, SPACECRAFT TRACKING, ACCURACY, ERROR ANALYSIS, GROUND...
877
877
May 29, 2011
05/11
by
NON
texts
eye 877
favorite 0
comment 0
This is the As-Designed Parts List, Electrical, Electronic, and Electromechanical (EEE) As-Built Parts Lists For The AMSU-A Instruments, for the Integrated Advanced Microwave Sounding Unit-A (AMSU-A).
Topics: COST ANALYSIS, DEEP SPACE, MATHEMATICAL MODELS, SPACE MISSIONS, STATISTICAL ANALYSIS, DESIGN...
257
257
Jul 11, 2010
07/10
by
SKURIDIN, G. A
texts
eye 257
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DEVELOPMENTS ARE DESCRIBED IN THE ACHIEVEMENTS OF SOVIET AND AMERICAN SPACE SCIENTISTS IN STUDYING VARIOUS CELESTIAL BODIES BY SPACECRAFT. PARTICULAR ATTENTION IS DEVOTED TO INFORMATION GATHERED ON THE MOON, MARS, JUPITER, MERCURY, VENUS AND SATURN.
Topics: HELIUM, HYDROGEN, INTERSTELLAR GAS, SPACE MISSIONS, SPACE PROBES, GAS ANALYSIS, LYMAN SPECTRA,...
190
190
Jul 12, 2010
07/10
by
Hicks, R. M.; Mendoza, J. P
texts
eye 190
favorite 0
comment 0
No Abstract Available
Topics: APOLLO PROJECT, METEOROID HAZARDS, METEOROIDS, OPERATIONAL HAZARDS, METEOROID PROTECTION, MISSION...
739
739
Jul 5, 2010
07/10
by
MOISEYENKO, U. I.; SOKOLOVA, L. S.; ISTOMIN, V. Y
texts
eye 739
favorite 0
comment 0
THE RESULTS ARE PRESENTED OF A STUDY OF THE ELECTRIC CONDUCTIVITY OF ROCKS UNDER DIFFERENT THERMODYNAMIC CONDUCTIONS. THE APPARATUS AND METHODS USED IN MEASURING THESE PARAMETERS ARE DESCRIBED. EXPERIMENTS FOR STUDYING THE EFFECT OF TEMPERATURE, PRESSURE, AND THE JOINT EFFECT OF THESE FACTORS ON ROCK RESISTIVITY ARE DISCUSSED, AS WELL AS THE RESULTS OF A STUDY OF THE THERMAL PROPERTIES OF SEDIMENTARY AND IGNEOUS ROCKS AT TEMPERATURES FROM ROOM TEMPERATURE TO 1200-1400 C. THE DEPENDENCE OF...
Topics: SOYUZ SPACECRAFT, SPACE STATIONS, U.S.S.R. SPACE PROGRAM, SPACE MISSIONS, SPACECRAFT...
212
212
Jun 21, 2010
06/10
by
Johnson, D. S
texts
eye 212
favorite 0
comment 0
No Abstract Available
Topics: COMPUTERS, ENGINEERING DRAWINGS, MULTIPROCESSING (COMPUTERS), MULTIPROGRAMMING, SPACE MISSIONS,...
221
221
May 30, 2011
05/11
by
Menon, Surabi; DelGenio, Anthony D.; Koch, Dorothy; Tselioudis, Georg
texts
eye 221
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We describe the coupling of the Goddard Institute for Space Studies (GISS) general circulation model (GCM) to an online sulfur chemistry model and source models for organic matter and sea-salt that is used to estimate the aerosol indirect effect. The cloud droplet number concentration is diagnosed empirically from field experiment datasets over land and ocean that observe droplet number and all three aerosol types simultaneously; corrections are made for implied variations in cloud turbulence...
Topics: AEROSPACE ENGINEERING, ELECTRIC BATTERIES, MISSION PLANNING, LITHIUM BATTERIES, RELIABILITY, METAL...
321
321
May 31, 2011
05/11
by
Comstock, J. Raymond, Jr.; Rudisill, Marianne; Kramer, Lynda J.; Busquets, Anthony M
texts
eye 321
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comment 0
Researchers within the eXternal Visibility System (XVS) element of the High-Speed Research (HSR) program developed and evaluated display concepts that will provide the flight crew of the proposed High-Speed Civil Transport (HSCT) with integrated imagery and symbology to permit path control and hazard avoidance functions while maintaining required situation awareness. The challenge of the XVS program is to develop concepts that would permit a no-nose-droop configuration of an HSCT and expanded...
Topics: INFRARED SPECTROSCOPY, ASTRONOMICAL SPECTROSCOPY, ORGANIC MATERIALS, SCIENTIFIC SATELLITES, SPACE...
213
213
May 22, 2011
05/11
by
NON
texts
eye 213
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comment 0
Formed in Jan. 1992, the Panel to Review EOSDIS Plans was charged with advising NASA on its plans for developing the Earth Observing System (EOS) Data and Information System (EOSDIS). Specifically, the panel was asked to do the following: assess the validity of the engineering and technical underpinnings of the EOSDIS; assess its potential value to scientific users; suggest how technical risk can be minimized; and assess whether current plans are sufficiently resilient to be adaptable to...
Topics: FLIGHT OPERATIONS, SPACE MISSIONS, SPACECRAFT CONTROL, TOTAL QUALITY MANAGEMENT, PERSONNEL...
1,657
1.7K
texts
eye 1,657
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Manned planetary missions
Topics: CONFERENCES, MANNED SPACE FLIGHT, SPACE EXPLORATION, SPACE MISSIONS, MANNED SPACE FLIGHT, PLANETARY...
455
455
Jul 26, 2010
07/10
by
Yee, H. C.; Sweby, P. K.; Griffiths, D. F
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Spurious stable as well as unstable steady state numerical solutions, spurious asymptotic numerical solutions of higher period, and even stable chaotic behavior can occur when finite difference methods are used to solve nonlinear differential equations (DE) numerically. The occurrence of spurious asymptotes is independent of whether the DE possesses a unique steady state or has additional periodic solutions and/or exhibits chaotic phenomena. The form of the nonlinear DEs and the type of...
Topics: LUBRICANTS, POLYMER MATRIX COMPOSITES, SELF LUBRICATION, TRIBOLOGY, WEAR, FILLERS, SPACE MISSIONS,...
