571
571
May 29, 2011
05/11
by
Kimmel, W. M.; Kuhn, N. S.; Berry, R. F.; Newman, J. A
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An overview and status of current activities seeking alternatives to 200 grade 18Ni Steel CVM alloy for cryogenic wind tunnel models is presented. Specific improvements in material selection have been researched including availability, strength, fracture toughness and potential for use in transonic wind tunnel testing. Potential benefits from utilizing damage tolerant life-prediction methods, recently developed fatigue crack growth codes and upgraded NDE methods are also investigated. Two...
Topics: CONFERENCES, NANOTECHNOLOGY, BIOTECHNOLOGY, AEROSPACE SYSTEMS
A DC motor's performance is usually characterized by a series of tests, which are conducted by pass/fail criteria. In most cases, these tests are adequate to address the performance characteristics under environmental and loading effects with some uncertainties and decent power/torque margins. However, if the motor performance requirement is very stringent, a better understanding of the motor characteristics is required. The purpose of this paper is to establish a standard way to extract the...
Topics: Northrop Grumman Aerospace Systems, Tran, Ahn N.
Key physical characteristics including density, packing fraction, moisture uptake, and as-cured dry glass transition temperature of cyanurate networks formed from bio-based cyanate esters synthesized from the natural product anethole were examined. The results showed that both equivalently high glass transition temperatures and lower moisture uptake compared to commercial materials could be achieved, though, for the non-optimal cure schedules studied, not in the same network. The most important...
Topics: DTIC Archive, AIR FORCE RESEARCH LAB EDWARDS AFB CA AEROSPACE SYSTEMS DIRECTORATE, *ESTERS,...
181
181
May 31, 2011
05/11
by
Mittaz, J. P. D.; Stewart, G., et al; Kaastra, J. S.; Tamura, T.; Fabian, A. C.; Mushotzky, F.; Peterson, J. R.; Ikebe, Y.; Lumb, D. H.; Paerels, F.
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We present the results of an analysis of broad band UV observations of the central regions of Abell 1795 observed with the optical monitor on XMM-Newton. As have been found with other UV observations of the central regions of clusters of galaxies, we find evidence for star formation. However, we also find evidence for absorption in the cD galaxy on a more extended scale than has been seen with optical imaging. We also report the first UV observation of part of the filamentary structure seen in...
Topics: GRID GENERATION (MATHEMATICS), COMPUTATIONAL GRIDS, GEOMETRY, AEROSPACE SYSTEMS, TURBOMACHINERY
It is believed that substantial cost, schedule, and technical benefits would result from development, implementation, and validation of Integrated Computational Materials Engineering (ICME) for aerospace propulsion applications. It is also believed that such development and implementation is necessary, even essential, to ensure that materials engineering play a significant continuing role in aerospace system design and development -- in fact, it is essential for all manner of materials...
Topics: DTIC Archive, COWLES CONSULTING LLC TOLLAND CT, *PROPULSION SYSTEMS*PROPULSION SYSTEMS, *AEROSPACE...
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221
Jun 13, 2011
06/11
by
George, Michael W.; Heineck, James T.; Nickison, Donald J
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A viewgraph presentation describing the laser incident in the NASA Unitary Plan Wind Tunnel (UPWT) is shown. The topics include: 1) Unitary Plan Wind Tunnel (UPWT); 2) UPWT 11' x 11' Transonic Wind Tunnel; 3) UPWT 9' x 7' Supersonic Wind Tunnel; 4) 3D Particle Image Velocimetry (PIV); 5) PIV System in 11' x 11' Transonic Test Section; 6) PIV installation in 11' x 11' TWT; 7) 3 Space Shuttle Ascent Configuration Test in UPWT 9' x 7' Test Section; 8) PIV installation in 9' x 7' SWT; 9) PIV Laser...
Topics: SOLAR SAILS, ACTUATORS, CONTROLLERS, AEROSPACE SYSTEMS, FINITE ELEMENT METHOD, STABILITY
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555
Jun 9, 2011
06/11
by
Xiao, X.; Edwards, J. R.; Hassan, H. A.; Cutler, A. D
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eye 555
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In high speed engines, thorough turbulent mixing of fuel and air is required to obtain high performance and high efficiency. Thus, the ability to predict turbulent mixing is crucial in obtaining accurate numerical simulation of an engine and its performance. Current state of the art in CFD simulation is to assume both turbulent Prandtl number and Schmidt numbers to be constants. However, since the mixing of fuel and air is inversely proportional to the Schmidt number, a value of 0.45 for the...
Topics: AEROSPACE SYSTEMS, INTEROPERABILITY, SUPPORT SYSTEMS, RANGE (EXTREMES), ECONOMY, STRUCTURAL MEMBERS
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213
Jun 2, 2011
06/11
by
Zhuravleva, Tatiana; Marshak, Alexande
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A new approach to validation of the Poisson stochastic radiative transfer method is proposed. In contrast to other validations of stochastic models, the main parameter of the Poisson model responsible for cloud geometrical structure - cloud aspect ratio - is determined entirely by matching measurements and calculations of the direct solar radiation. If the measurements of the direct solar radiation is unavailable, it was shown that there is a range of the aspect ratios that allows the...
Topics: AEROSPACE SYSTEMS, MULTISENSOR APPLICATIONS, CAPACITORS, CAPACITANCE, INDUCTORS, ANTENNAS, PRESSURE...
166
166
Jun 9, 2011
06/11
by
Bartels, Robert E
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This paper presents a modification of the spring analogy scheme which uses axial linear spring stiffness with selective spring stiffening/relaxation. An alternate approach to solving the geometric conservation law is taken which eliminates the need for storage of metric Jacobians at previous time steps. Efficiency and verification are illustrated with several unsteady 2-D airfoil Euler computations. The method is next applied to the computation of the turbulent flow about a 2-D airfoil and wing...
Topics: NEURAL NETS, OPTIMIZATION, DESIGN ANALYSIS, AEROSPACE ENGINEERING, AEROSPACE SYSTEMS, SYSTEMS...
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251
Jun 13, 2011
06/11
by
Barrett, Michael J.; Johnson, Paul K.; Naples, Andrew G
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The feasibility of using carbon-carbon (C-C) recuperators in conceptual closed-Brayton-cycle space power conversion systems was assessed. Recuperator performance expectations were forecast based on notional thermodynamic cycle state values for potential planetary missions. Resulting thermal performance, mass and volume for plate-fin C-C recuperators were estimated and quantitatively compared with values for conventional offset-strip-fin metallic designs. Mass savings of 30 to 60 percent were...
Topics: FLYWHEELS, SPACECRAFT GUIDANCE, SATELLITE GUIDANCE, SPACECRAFT POWER SUPPLIES, AEROSPACE SYSTEMS,...
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405
May 22, 2011
05/11
by
Kempel, Leo C.; Volakis, John L
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eye 405
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Microstrip patch antennas offer considerable advantages in terms of weight, aerodynamic drag, cost, flexibility, and observables over more conventional protruding antennas. These flat patch antennas were first proposed over thirty years ago by Deschamps in the United States and Gutton and Baisinot in France. Such antennas have been analyzed and developed for planar as well as curved platforms. However, the methods used in these designs employ gross approximations, suffer from extreme...
Topics: AEROSPACE SYSTEMS, ELECTRICAL INSULATION, WIRING, AEROSPACE ENGINEERING, ELECTRIC WIRE, QUALITY...
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Jun 9, 2011
06/11
by
Kleb, William L.; Weilmuenster, K. Jame
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A study of the leeside flow characteristics of the Shuttle Orbiter is presented for a reentry flight condition. The flow is computed using a point-implicit, finite-volume scheme known as the Langley Aerothermodynamic Upwind Relaxation Algorithm (LAURA). LAURA is a second-order accurate, laminar Navier-Stokes solver, incorporating finite-rate chemistry with a radiative equilibrium wall temperature distribution and finite-rate wall catalysis. The resulting computational solution is analyzed in...
Topics: DESIGN ANALYSIS, NUCLEAR FUSION, PROPULSION, SYSTEMS ENGINEERING, SPECIFIC IMPULSE, AEROSPACE...
Topics: DTIC Archive, PRINCETON UNIV NJ, *COMBUSTION, AEROSPACE SYSTEMS, FLAMES, IGNITION, KINETICS
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May 31, 2011
05/11
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Bartram, Scott M.; Ingram, JoAnne L., et al; Humphreys, William M., Jr.; Jenkins, Luther N.; Jordan, Jeffrey D.; Lee, Joseph W.; Leighty, Bradley D.; Meyers, James F.; South, Bruce W.; Cavone, Angelo A.
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A Unified Instrumentation Test examining the combined application of Pressure Sensitive Paint, Projection Moire Interferometry, Digital Particle Image Velocimetry, Doppler Global Velocimetry, and Acoustic Microphone Array has been conducted at the NASA Langley Research Center. The fundamental purposes of conducting the test were to: (a) identify and solve compatibility issues among the techniques that would inhibit their simultaneous application in a wind tunnel, and (b) demonstrate that...
Topics: SYSTEMS ENGINEERING, AEROSPACE SYSTEMS, STANDARDS, DATA BASES, INFORMATION SYSTEMS, INTERNET...
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261
May 31, 2011
05/11
by
Hamidzadeh, Hamid R
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Due to strong potential applications and more demanding requirements imposed upon thin-film structures for space deployable, there has been increasing research and development activities during recent years in the field of vibration analysis of these types of structures. Moreover, interests in employing these structural components have received renewed emphasis in recent years within NASA and the Air Force. This is due to their inherent lightweight, low packaging and launch volume, and relative...
Topics: AEROSPACE SYSTEMS, DESIGN ANALYSIS, STRUCTURAL ANALYSIS, COMPUTER AIDED DESIGN, ENGINEERS,...
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419
Jun 13, 2011
06/11
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Caldwell, John A.; Mallis, Melissa M.; Colletti, Laura M.; Oyung, Raymond L.; Brandt, Summer L.; Arsintescu, Lucia; DeRoshia, Charlie W.; Reduta-Rojas, Dinah D.; Chapman, Patrick M
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This investigation assessed the impact of ultra-long-range (ULR) simulator flights, departing either in the morning or late evening, on the alertness and performance of 17 commercial aviators. Immediately prior to and throughout each flight, alertness and performance were assessed via a computerized test of sustained attention, subjective questionnaires, and ''hand-flying'' tasks. There were fatigue-related effects on the majority of assessments, and the nature of these effects was consistent...
Topics: AEROSPACE SYSTEMS, CLIMATE, DISASTERS, FEEDBACK, WATER VAPOR, AEROSOLS, GREENHOUSE EFFECT, PROJECT...
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199
May 29, 2011
05/11
by
Cucinotta, F. A.; Dicello, J. F
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Experimental techniques in molecular biology are being applied to study biological risks from space radiation. The use of molecular assays presents a challenge to biophysical models which in the past have relied on descriptions of energy deposition and phenomenological treatments of repair. We describe a biochemical kinetics model of cell cycle control and DNA damage response proteins in order to model cellular responses to radiation exposures. Using models of cyclin-cdk, pRB, E2F's, p53, and...
Topics: AEROSPACE SYSTEMS, COST ESTIMATES, NASA PROGRAMS, SYSTEMS INTEGRATION, DATA BASES, PROJECT PLANNING
2,779
2.8K
Jun 21, 2010
06/10
by
NON
texts
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Classroom training textbook on radiographic methods and equipment for nondestructive testing
Topics: AEROSPACE SYSTEMS, COMPONENT RELIABILITY, RELIABILITY ENGINEERING, AEROSPACE ENGINEERING, SYSTEM...
266
266
May 27, 2011
05/11
by
Smith, Timothy D.; Steffen, Christopher J., Jr.; Yungster, Shaye; Keller, Dennis J
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eye 266
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The all rocket mode of operation is shown to be a critical factor in the overall performance of a rocket based combined cycle (RBCC) vehicle. An axisymmetric RBCC engine was used to determine specific impulse efficiency values based upon both full flow and gas generator configurations. Design of experiments methodology was used to construct a test matrix and multiple linear regression analysis was used to build parametric models. The main parameters investigated in this study were: rocket...
Topics: CERAMICS, FIBER COMPOSITES, SILICON CARBIDES, JOINTS (JUNCTIONS), BONDING, AEROSPACE SYSTEMS, HIGH...
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473
Jun 21, 2010
06/10
by
Bird, T. H.; Smokler, M. I.; Smyth, D. L
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Photographs and mosaics of lunar surface obtained from Surveyor 6
Topics: AEROSPACE SYSTEMS, BALLS, BOLTS, LOCKS (FASTENERS), SEPARATORS, CONFERENCES, JOINTS (JUNCTIONS),...
Ball Aerospace Systems Division developed a highly efficient management method known as the "total integrated systems approach" a technique developed of necessity for managing extremely complex aerospace programs involving integration of a great many individual systems. These systems, developed at different times by many different companies, must not only work perfectly when separately tested, they must also perform compatibly when integrated into the complete prime system. Systems...
Topics: NASA Technical Reports Server (NTRS), MANAGEMENT SYSTEMS, MANAGEMENT METHODS, FAILURE, AEROSPACE...
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257
Jun 1, 2011
06/11
by
Johnson, Walter W.; Liao, Min-Ju; Tse, Stephe
texts
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The present experiment employed target detection tasks to investigate attentional deployment during visual search for target aircraft symbols on a cockpit display of traffic information (CDTI). Targets were defined by either a geometric property (aircraft on a collision course with Ownship) or a textual property (aircraft with associated altitude tags indicating an even altitude level). Effects of target location and target brightness (highlighting) were examined. Target location was...
Topics: DESIGN OPTIMIZATION, DECISION MAKING, STOCHASTIC PROCESSES, TECHNOLOGY TRANSFER, SYSTEMS...
This report reflects the Programme that was approved by the AGARD National Delegates Board. Section I includes a chronological listing of the meetings tentatively scheduled to take place during 1979 and Section II gives a detailed description of the individual Panel Programmes, the Consultant and Exchange Programme, and the Military Committee Studies Programme. The total budget required to support the Proposed 1979 AGARD Technical Programme is presented in Section III. The Publication Summary...
Topics: DTIC Archive, *AERONAUTICS, *AEROSPACE SYSTEMS, *RESEARCH MANAGEMENT, *PLANNING PROGRAMMING...
The numerically stable loosely-coupled partitioned solution procedures for the fast steady and unsteady multidisciplinary thermal analysis of hot aerospace structures were further refined to accelerate convergence in the steady-state case and improve robustness in all cases. The refinement was obtained based on the mathematical analysis of the formulation of these algorithms for the continuous counterpart of the problem of interest. The resulting coupled solution methods were successfully...
Topics: DTIC Archive, STANFORD UNIV CA, *AEROSPACE SYSTEMS, *THERMAL ANALYSIS, ALGORITHMS, CONVERGENCE,...
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201
May 27, 2011
05/11
by
Sullivan, Joh
texts
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Acquiring pressure maps of aerodynamic surfaces is very important for improving and validating the performance of aerospace vehicles. Traditional pressure measurements are taken with pressure taps embedded in the model surface that are connected to transducers. While pressure taps allow highly accurate measurements to be acquired, they do have several drawbacks. Pressure taps do not give good spatial resolution due to the need for individual pressure tubes, compounded by limited space available...
Topics: AEROSPACE SYSTEMS, LAUNCH VEHICLES, LIQUID HYDROGEN, CRYOGENIC COMPUTER STORAGE, CYCLES, PROPELLANT...
This is the final technical report for grant number NAG-1-02101. The title of this grant was "Advanced Tools and Techniques for Formal Techniques In Aerospace Systems". The principal investigator on this grant was Dr. John C. Knight of the Computer Science Department, University of Virginia, Charlottesville, Virginia 22904-4740. This report summarizes activities under the grant during the period 7/01/2002 to 9/30/2004. This report is organized as follows. In section 2, the technical...
Topics: NASA Technical Reports Server (NTRS), AEROSPACE SYSTEMS, STUDENTS, RESEARCH AND DEVELOPMENT,...
Recently retiring from his position as Deputy Director of NASA's Goddard Space Flight Center in Greenbelt, Maryland, Bill Townsend is now the Vice President and General Manager of Civil Space Systems of Ball Aerospace and Technologies Corporation. Prior to his assignment to Goddard in 1998, Mr.Townsend had served as the Deputy Associate Administrator (Programs) for the Office of Earth Science since 1993. For a 20 month period beginning June 1996, he was also the acting Associate Administrator...
Topics: NASA Technical Reports Server (NTRS), AEROSPACE ENGINEERING, AEROSPACE SYSTEMS, EARTH SCIENCES,...
This document contains the proceedings of the Training Workshop on Nanobiotechnology held at NASA Langley Research Center, Hampton, Virginia, June 14-15, 2000. The workshop was jointly sponsored by the University of Virginia's Center for Advanced Computational Technolog and NASA. Workshop attendees were from NASA, other government agencies, industry and universities. The objectives of the workshop were to give overviews of the diverse activities in nanobiotechnology and to identify their...
Topics: NASA Technical Reports Server (NTRS), CONFERENCES, NANOTECHNOLOGY, BIOTECHNOLOGY, AEROSPACE...
Expected development maturity under contract (spec) should correlate with Project/Program Approved MGA Depletion Schedule in Mass Properties Control Plan. If specification NTE, MGA is inclusive of Actual MGA (A5 & A6). If specification is not an NTE Actual MGA (e.g. nominal), then MGA values are reduced by A5 values and A5 is representative of remaining uncertainty. Basic Mass = Engineering Estimate based on design and construction principles with NO embedded margin MGA Mass = Basic Mass *...
Topics: NASA Technical Reports Server (NTRS), AEROSPACE SYSTEMS, SCHEDULES, MASS, EMBEDDING, AGGREGATES,...
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261
May 29, 2011
05/11
by
Borucki, W.; Caldwell, D.; Koch, D.; Jenkins, J.; Ninkov, Z
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eye 261
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A small photometer to detect transits by extrasolar planets has been assembled and is being tested at Lick Observatory on Mt. Hamilton, California. The Vulcan photometer is constructed from a 30 cm focal length, F/2.5 AeroEktar reconnaissance lens and Photometrics PXL16800 CCD camera. A spectral filter is used to confine the pass band from 480 to 763 mn. It simultaneously monitors 6000 stars brighter than 12th magnitude within a single star field in the galactic plane. When the data are folded...
Topics: ENGINE TESTS, FISSION, AEROSPACE SYSTEMS, HEATING EQUIPMENT, FABRICATION, THERMOHYDRAULICS,...
Topics: DTIC Archive, PRINCETON UNIV NJ, *AEROSPACE SYSTEMS, *COMBUSTION, ATOMS, FUELS, IGNITION, KINETICS,...
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434
Jul 11, 2010
07/10
by
Husar, R. B
texts
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A key question in the current energy debate concerns the economic and environmental costs of increased coal usage as a replacement for gas and oil. The environmental constraints are due to mining, transportation, and the release of combustion products (SOx, CO2, and fly ash). Sulfur oxide emissions and their effect on the environment were under intense study during the past 25 years, first because of the acute air pollution episodes that occurred in populated areas (e.g., the 1952 and 1962...
Topics: IRRADIATION, NUCLEAR ENGINE FOR ROCKET VEHICLES, RADIATION DISTRIBUTION, REACTOR PHYSICS, AEROSPACE...
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322
Jun 21, 2010
06/10
by
Fuchs, H. O
texts
eye 322
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Load deflection curves for minimum weight springs
Topics: AEROSPACE SYSTEMS, FLEXIBILITY, PIVOTS, STRUCTURAL MEMBERS, CONFERENCES, FABRICATION, MECHANICAL...
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533
Aug 2, 2010
08/10
by
Krohn, Douglas D
texts
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The effects of stainless steel exposure to iodinated water is a concern in developing the Integrated Water System (IWS) for Space Station Freedom. The IWS has a life requirement of 30 years, but the effects of general and localized corrosion over such a long period have not been determined for the candidate materials. In 1978, Umpqua Research Center immersed stainless steel 316L, 321, and 347 specimens in a solution of deionized water and the Space Shuttle microbial check valve resin. In April...
Topics: AEROSPACE SYSTEMS, COST ANALYSIS, COST REDUCTION, MANUFACTURING, PRODUCTION COSTS, DOWNTIME,...
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237
Jun 21, 2010
06/10
by
Denton, C. I.; Rushing, F. C.; Simon, A. B
texts
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Design of rigid thermally stable beryllium copper extendible boom for space applications
Topics: MECHANICAL DRIVES, MECHANICAL ENGINEERING, SERVOMECHANISMS, SOLAR COLLECTORS, AEROSPACE SYSTEMS,...
The Jet Propulsion Laboratory contracted Malin Space Science Systems Inc. to outfit Curiosity with four of its cameras using the latest commercial imaging technology. The company parlayed the knowledge gained under working with NASA to develop an off-the-shelf line of cameras, along with a digital video recorder, designed to help troubleshoot problems that may arise on satellites in space.
Topics: NASA Technical Reports Server (NTRS), AEROSPACE SYSTEMS, CAMERAS, DIGITAL TELEVISION, IMAGING...
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229
Jul 11, 2010
07/10
by
Keenan, D. M
texts
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Electromyographic activity and bodily movement of the masseter muscle were recorded in three pairs of human subjects, where one member of each pair was systematically presented with greater pay and each could reduce the value of money received by the other. The number of biting responses was as high or higher for the subject receiving less money immediately after coin delivery. However, the number of masseter contractions for the subject receiving more money remained higher at other times...
Topics: AEROSPACE SYSTEMS, RESEARCH FACILITIES, WEST GERMANY, AEROSPACE MEDICINE, ENERGY TECHNOLOGY, FLIGHT...
This report is part of a series of annual papers on Advanced Concepts and Missions Division (ACMD) publications. It contains a bibliography and corresponding abstract of all papers presented or published by personnel of ACMD during the calendar year 1971. Also included are abstracts of final reports ACMD contracted studies perfomed during this time period.
Topics: NASA Technical Reports Server (NTRS), ABSTRACTS, TECHNICAL WRITING, AEROSPACE SYSTEMS, MISSION...
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297
Jun 13, 2011
06/11
by
Chew, Gilbert; Pelaccio, Dennis G.; Chiroux, Robert; Pervan, Sherry; Rauwolf, Gerald A.; White, Charle
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Science Applications International Corporation (SAIC), with support from NASA Marshall Space Flight Center, has conducted a preliminary study to compare options for augmenting the thrust of a conventional nuclear electric propulsion (NEP) system. These options include a novel nuclear propulsion system concept known as Hybrid Indirect Nuclear Propulsion (HINP) and conventional chemical propulsion. The utility and technical feasibility of the HINP concept are assessed, and features and potential...
Topics: DECISION MAKING, DESIGN ANALYSIS, SYSTEMS ENGINEERING, AEROSPACE SYSTEMS, AEROSPACE VEHICLES,...
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397
Jun 11, 2011
06/11
by
Witte, Larry C.; Hollingsworth, D. Keit
texts
eye 397
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Radiators are an enabling technology for the human exploration and development of the moon and Mars. As standard components of the heat rejection subsystem of space vehicles, radiators are used to reject waste heat to space and/or a planetary environment. They are typically large components of the thermal control system for a space vehicle or human habitation facility, and in some cases safety factors are used to oversize them when the operating environment cannot be fully characterized....
Topics: BIBLIOGRAPHIES, AUTONOMY, ROBOTICS, AEROSPACE SYSTEMS, SPACE EXPLORATION, AUTOMATIC CONTROL, MAN...
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232
Jun 13, 2011
06/11
by
Chang, Chau-Lya
texts
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Application of the newly emerged space-time conservation element solution element (CESE) method to compressible Navier-Stokes equations is studied. In contrast to Euler equations solvers, several issues such as boundary conditions, numerical dissipation, and grid stiffness warrant systematic investigations and validations. Non-reflecting boundary conditions applied at the truncated boundary are also investigated from the stand point of acoustic wave propagation. Validations of the numerical...
Topics: INTEROPERABILITY, CONFIGURATION MANAGEMENT, AEROSPACE SYSTEMS, SYSTEMS ENGINEERING, SPACE FLIGHT,...
All of our ideas have been field tested and have proven effective in our environment. Our objectives are: We will share our ideas about marketing training and what we've implemented at Michoud Space Systems. You will go away with at least one new idea or insight about how to more effectively market your training.
Topics: NASA Technical Reports Server (NTRS), AEROSPACE SYSTEMS, EDUCATION, MARKETING, PERFORMANCE TESTS,...
The development of a compact passive hydrogen maser has been completed by Ball Aerospace Systems Division. We describe the design and operation of a number of subsystems in the unit. These include a self-starting low power r.f. dissociator, a combination getter/ion pump vacuum system, a small hydride source of molecular hydrogen, and a method of automatically locking to the microwave resonance. We also report the measurement of performance of the maser as a whole.
Topics: DTIC Archive, BALL AEROSPACE SYSTEMS DIV BOULDER CO, *MASERS, MOLECULES, MICROWAVES, HYDROGEN,...
The report contains information on issues related to Science and Technology in Japan including aerospace systems, civil aviation and microelectronics. One of the highlights of the report are a series of technical articles on such topics as superconductivity and its applications.
Topics: DTIC Archive, JOINT PUBLICATIONS RESEARCH SERVICE ARLINGTON VA, *MICROELECTRONICS,...
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228
Jun 26, 2011
06/11
by
NON
texts
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A mounting platform for heat producing instruments operated in a narrow equilibrium temperature range comprises a grid-like structure with relatively large openings therein. The instruments are secured to and thermally coupled with the grid surface facing the instruments. Excess heat from the instruments is selectively radiated to the ambient through openings in the grid, the grid surfaces at these openings exhibiting low thermal emissivity and adsorptivity. The remainder of the grid is...
Topics: HUMAN FACTORS ENGINEERING, MANNED SPACE FLIGHT, AEROSPACE SYSTEMS, STANDARDS, SYSTEMS INTEGRATION,...
The presentation reviews what is meant by the term 'fly-by-wireless', common problems and motivation, provides recent examples, and examines NASA's future and basis for collaboration. The vision is to minimize cables and connectors and increase functionality across the aerospace industry by providing reliable, lower cost, modular, and higher performance alternatives to wired data connectivity to benefit the entire vehicle/program life-cycle. Focus areas are system engineering and integration...
Topics: NASA Technical Reports Server (NTRS), SPACECRAFT DESIGN, SYSTEMS ENGINEERING, AEROSPACE SYSTEMS,...
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242
May 31, 2011
05/11
by
Rodriquez, Alvaro Ch
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An analytical solution to the steady-state fluid temperature for 1-D (one dimensional) transpiration cooling has been derived. Transpiration cooling has potential use in the aerospace industry for protection against high heating environments for re-entry vehicles. Literature for analytical treatments of transpiration cooling has been largely confined to the assumption of thermal equilibrium between the porous matrix and fluid. In the present analysis, the fundamental fluid and matrix equations...
Topics: AEROSPACE SYSTEMS, RUBBER, CERAMIC FIBERS, INSULATION, MANUFACTURING, ABLATION, HIGH TEMPERATURE,...
Current Verbiage in S-120 Applies to Dry Mass. Mass Margin is difference between Required Mass and Predicted Mass. Performance Margin is difference between Predicted Performance and Required Performance. Performance estimates and corresponding margin should be based on Predicted Mass (and other inputs). Contractor Mass Margin reserved from Performance Margin. Remaining performance margin allocated according to mass partials. Compliance can be evaluated effectively by comparison of three areas...
Topics: NASA Technical Reports Server (NTRS), AEROSPACE SYSTEMS, SYSTEMS ENGINEERING, MASS, STANDARDS,...
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439
May 31, 2011
05/11
by
Sunshine, J. M.; Bus, S. J.; Burbine, T. H.; McCoy, T. J.; Binzel, R. P
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Spectroscopy remains a powerful tool for inferring the modal mineralogy and mafic mineral composition of asteroid surfaces. Since similar measurements can be made on meteorite samples, spectroscopy can help link the two populations and add spatial and geologic context to detailed geochemical knowledge derived from meteorite samples. For example, analysis of the recent NEAR-Shoemaker mission to Eros include detailed study of NIS spectra to assess the affinity of Eros to ordinary chondrites. As...
Topics: AEROSPACE SYSTEMS, MANAGEMENT METHODS, SYSTEM FAILURES, INFORMATION MANAGEMENT, V-22 AIRCRAFT, COST...
Space debris mitigation practices will be insufficient to prevent the continued growth of the Earth satellite population. Removal of orbital debris can improve the reliability of present and future space systems. The challenges of developing an effective, affordable debris removal capability are considerable. The time is right for a new look at space remediation concepts. In concert with or following the current IAA study An international approach to the remediation of the near-Earth space...
Topics: NASA Technical Reports Server (NTRS), SPACE DEBRIS, AEROSPACE SYSTEMS, RELIABILITY, POPULATIONS,...
