256
256
Jun 2, 2011
06/11
by
Abarzhi, S. I.; Herrmann, M
texts
eye 256
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We performed systematic theoretical and numerical studies of the nonlinear large-scale coherent dynamics in the Richtmyer-Meshkov instability for fluids with contrast densities. Our simulations modeled the interface dynamics for compressible and viscous uids. For a two-fluid system we observed that in the nonlinear regime of the instability the bubble velocity decays and its surface attens, and the attening is accompanied by slight oscillations. We found the theoretical solution for the system...
Topics: INFORMATION SYSTEMS, AIR PURIFICATION, BIOMASS, FOOD PROCESSING, LIFE SUPPORT SYSTEMS, ON-LINE...
198
198
May 29, 2011
05/11
by
Abdalati, W.; Yungel, J; Krabill, W.; Frederick, E.; Manizade, S.; Martin, C.; Sonntag, J.; Swift, R.; Thomas, R.; Wright, W.
texts
eye 198
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In 1998 and '99, the Arctic Ice Mapping (AIM) program completed resurveys of lines occupied 5 years earlier revealing elevation changes of the Greenland ice sheet and identifying areas of significant thinning, thickening and balance. In planning these surveys, consideration had to be given to the spatial constraints associated with aircraft operation, the spatial nature of ice sheet behavior, and limited resources, as well as temporal issues, such as seasonal and interannual variability in the...
Topics: DATA BASES, MARS SURFACE, IRON OXIDES, SULFATES, CARBONATES, OXIDES, ZEOLITES, GAS ANALYSIS, GAS...
254
254
Jun 13, 2011
06/11
by
Abedin, M. N.; Refaat, T. F.; Sulima, O. V.; Ismail, S.; Singh, U. N
texts
eye 254
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NASA Langley Research Center (LaRC), in partnership with the University of Delaware (UD), developed AlGaAsSb/InGaAsSb custom-designed phototransistors in the 0.6-2.5 micron wavelength range for applications to laser remote sensing. The phototransistor s performance greatly exceeds the previously reported results at this wavelength range in the literature. The performances of the custom-designed phototransistor, such as responsivity, detectivity, and gain, are improved significantly as compared...
Topics: BOUNDARY LAYER TRANSITION, ABLATION, CAVITIES, MACH NUMBER, THERMAL PROTECTION, AEROTHERMODYNAMICS,...
254
254
May 31, 2011
05/11
by
Ackerman, Andrew S.; Toon, O. B.; Stevens, D. E.; Coakley, J. A., Jr
texts
eye 254
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Recent satellite observations indicate a significant decrease of cloud water in ship tracks, in contrast to an ensemble of in situ ship-track measurements that show no average change in cloud water relative to the surrounding clouds. We find through large-eddy simulations of stratocumulus that the trend in the satellite data is likely an artifact of sampling only overcast clouds. The simulations instead show cloud cover increasing with droplet concentrations. Our simulations also show that...
Topics: ROBOTICS, SYSTEMS ENGINEERING, AEROSPACE INDUSTRY, MANUFACTURING, METAL CUTTING, COMPUTER PROGRAMS,...
400
400
Jun 2, 2011
06/11
by
Adler, R
texts
eye 400
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The papers in this section include: 1) 'Thunderstorm Top Structure Observed by Aircraft Overflights with an Infrared Radiometer'; 2) 'Thunderstorm Intensity as Determined from Satellite Data'; 3) 'Relation of Satellite-Based Thunderstorm Intensity to Radar-Estimated Rainfall'; 4) 'A Simple Physical Basis for Relating Geosynchronous Satellite Infrared Observations to Thunderstorm Rainfall'; 5) 'Satellite-Observed Cloud-Top Height Changes in Tornadic Thunderstorms'; 6) 'Predicting Tropical...
Topics: MOLECULAR GASES, TROPOSPHERE, SPECTROMETERS, SAGE SATELLITE, REMOTE SENSING, SPECTROSCOPY, DATA...
326
326
Sep 20, 2010
09/10
by
Alewine, Neal Jo
texts
eye 326
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Multiple instruction rollback (MIR) is a technique to provide rapid recovery from transient processor failures and was implemented in hardware by researchers and slow in mainframe computers. Hardware-based MIR designs eliminate rollback data hazards by providing data redundancy implemented in hardware. Compiler-based MIR designs were also developed which remove rollback data hazards directly with data flow manipulations, thus eliminating the need for most data redundancy hardware....
Topics: BOOSTER ROCKET ENGINES, DYNAMIC TESTS, ENVIRONMENT SIMULATORS, GAS FLOW, HIGH TEMPERATURE GASES,...
333
333
May 21, 2011
05/11
by
Allbrooks, Martha; Atkinson, Dal
texts
eye 333
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The purpose of this report is to document the magnitude and types of impact damage to materials and systems on the LDEF. This report will provide insights which permit NASA and industry space-systems designers to more rapidly identify potential problems and hazards in placing a spacecraft in low-Earth orbit (LEO). This report is structured to provide (1) a background on LDEF, (2) an introduction to the LEO meteoroid and debris environments, and (3) descriptions of the types of damage caused by...
Topics: COMPUTER NETWORKS, OFFICE AUTOMATION, DATA BASE MANAGEMENT SYSTEMS, DATA BASES, DATA RETRIEVAL,...
292
292
May 26, 2011
05/11
by
Allen, D. R.; Stanford, J. L.; Elson, L. S.; Fishbein, E. F.; Froidevaux, L.; Waters, J. W
texts
eye 292
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The ''4-day wave'' is an eastward moving quasi-nondispersive feature with period near 4 days occurring near the winter polar stratopause. This paper presents evidence of the 4-day feature in Microwave Limb Sounder (MLS) temperature, geopotential height, and ozone data from the late southern winters of 1992 and 1993. Space-time spectral analyses reveal a double-peaked temperature structure consisting of one peak near the stratopause and another in the lower mesosphere, with an out-of-phase...
Topics: LIMNOLOGY, OCEANOGRAPHY, CONFERENCES, DATA BASES, DOCUMENTS, ABSTRACTS, CHARACTERIZATION,...
186
186
Jun 12, 2011
06/11
by
Aller, Margo F
texts
eye 186
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This work represents a part of a long-term study of the X-ray flux variability of 3C 120 and its relation to flux and structural changes in the radio jet of this galaxy. The grant included fiinding for the rediiction and analysis of data obt,ained during the time pwiod of Rossi XTE cycle 8 (March 1, 2003-February 29, 2004). Prior RXTE observations, combined with single dish monitoring at centimeter wavelengths and 43 GHz mapping (monthly until February 1999 and bimonthly thereafter) of the...
Topics: DATA BASES, COORDINATES, GEODESY, IMAGING TECHNIQUES, GEOLOGY, REMOTE SENSING, GEOLOGICAL SURVEYS,...
270
270
Jul 9, 2010
07/10
by
Allison, C. B
texts
eye 270
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The combustion characteristics of hydrazine strands were studied under both steady state and oscillatory conditions. A steady strand burner was used to measure steady strand burning rates, liquid temperature distributions and surface temperatures as a function of pressure in the pressure range of 0.32 to 42 atm. It was found that for subatmospheric pressures the burning rate varied as the square root of pressure; for pressures greater than atmospheric the burning rate varied linearly with...
Topics: DATA PROCESSING EQUIPMENT, TERMINOLOGY, GROUND SUPPORT EQUIPMENT, INPUT/OUTPUT ROUTINES, MACHINE...
Relational, hierarchical, network, functional, and object oriented databases support its corresponding query language, SQL, DL/I, CODASYL-DML, DAPLEX, and OO-DML, respectively. However, each database type may be accessed only by its own language. The goal of M2DBMS is to provide a heterogeneous environment in which any supported database is accessible by any supported query language. This is known as cross model access capability. In this thesis, relational to object oriented database cross...
Topic: DATA BASES
Thesis advisor, C. Thomas Wu
Topics: DATA BASES, DATA MANAGEMENT, COMPATIBILITY
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70
Oct 5, 2015
10/15
by
Anastasopoulos, Achilles.
texts
eye 70
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Thesis advisor, C. Thomas Wu
Topic: DATA BASES,DATA MANAGEMENT,COMPATIBILITY
320
320
May 29, 2011
05/11
by
Anderson, Bobby; Horan, Stephe
texts
eye 320
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Three Corner Satellite is a constellation of three nanosatellites designed and built by students. New Mexico State University has taken on the design of the communications system for this constellation. The system includes the forward link, return link, and the crosslink. Due to size, mass, power, and financial constraints, we must design a small, light, power efficient, and inexpensive communications system. This thesis presents the design of a radio system to accomplish the data transmission...
Topics: SKIN FRICTION, PRESSURE GRADIENTS, FRICTION MEASUREMENT, HIGH REYNOLDS NUMBER, FLAT PLATES,...
144
144
Aug 2, 2010
08/10
by
Anderson, D. T.; Mckay, C. P.; Wharton, Robert A., Jr.; Sagan, C.; Squyres, S. W.; Simmons, G. M
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eye 144
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The study of the origin of life and the prospects for human exploration of Mars are two themes developed in a new 57-minute film, Life on Ice, Antarctica, and Mars, produced by the InnerSpace Foundation and WHRO Television for broadcast by the Public Broadcasting System (PBS). A brief explanation of the film and how it relates to the future human exploration of space is presented.
Topics: ATMOSPHERIC MODELS, AIR WATER INTERACTIONS, ALKALINITY, ATMOSPHERIC COMPOSITION, BIOSPHERE, CARBON,...
447
447
Jul 23, 2010
07/10
by
Anderson, Dave; Bull, John; Chisholm, Joh
texts
eye 447
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No Abstract Available
Topics: AEROSPACE SCIENCES, CATALOGS (PUBLICATIONS), CONFERENCES, DOCUMENTATION, INDEXES (DOCUMENTATION),...
337
337
Sep 20, 2010
09/10
by
Anderson, Robert C.; Trucco, Richard E.; Rubin, L. F.; Swain, D. M
texts
eye 337
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Flowfield characterization has been accomplished for several fuel injector configurations using simultaneous planar laser induced fluorescence (PLIF) and laser holographic imaging (LHI). The experiments were carried out in the GASL-NASA HYPULSE real gas expansion tube facility, a pulsed facility with steady test times of about 350 microsec. The tests were done at simulated Mach numbers 13.5 and 17. The focus of this paper is on the measurement technologies used and their application in a...
Topics: DATA BASES, WATER RECLAMATION, ENVIRONMENTAL CONTROL, LIFE SUPPORT SYSTEMS, AIR PURIFICATION,...
The Global Ocean Data Assimilation Experiment (GODAE) is an endeavor that will likely change the path of oceanography for many years. This attempt to assimilate, organize and provide massive quantities of widely varied oceanographic and meteorological data to the world could be a catalyst for new and innovative research opportunities. One of the data sources important to GODAE and of great possible value, the Array for Real-time Geostrophic Oceanography (ARGO), is another innovation that may...
Topic: DATA BASES.
549
549
Nov 15, 2016
11/16
by
Andrea Vattani, Flavio Chierichetti, Keegan Lowenstein
texts
eye 549
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ABSTRACT When a frequently-accessed cache item expires, multiple requests to that item can trigger a cache miss and start regenerating that same item at the same time. This phenomenon, known as cache stampede , severely limits the performance of databases and web servers. A natural countermeasure to this issue is to let the processes that perform such requests to randomly ask for a regeneration before the expiration time of the item. In this paper we give optimal algorithms for performing such...
Topics: computer science, International Conference on Very Large Data Bases
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150
May 23, 2011
05/11
by
Appenzeller, Christof; Holton, James R
texts
eye 150
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Vertical soundings of stratospheric ozone often exhibit laminated tracer structures characterized by strong vertical tracer gradients. The change in time of these gradients is used to define a tracer lamination rate. It is shown that this quantity can be calculated by the cross product of the horizontal temperature and horizontal tracer gradients. A climatology based on UARS satellite-borne ozone data and on ozone-like pseudotracer data is presented. Three stratospheric regions with high...
Topics: INFORMATION RETRIEVAL, PATENTS, ARTIFICIAL INTELLIGENCE, MULTIMEDIA, DATA STORAGE, DATA BASES,...
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26
Nov 26, 2019
11/19
by
Applehans, Wayne
texts
eye 26
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115 pages ; 26 cm
Topics: DATA BASES, DATA BASE MANAGEMENT SYSTEMS, INFORMATION MANAGEMENT, WORLD WIDE WEB, INFORMATION...
9
9.0
Oct 2, 2019
10/19
by
Ardis, Susan
texts
eye 9
favorite 2
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vii, 216 pages ; 23 cm
Topics: Libraries -- United States -- Special collections -- Databases, Libraries -- Special collections,...
286
286
Jun 3, 2011
06/11
by
Armstrong, Curtis D.; Humphreys, William M
texts
eye 286
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We are developing software to explore the fault tolerance of quantum dot cellular automata gate architectures in the presence of manufacturing variations and device defects. The Topology Optimization Methodology using Applied Statistics (TOMAS) framework extends the capabilities of the A Quantum Interconnected Network Array Simulator (AQUINAS) by adding front-end and back-end software and creating an environment that integrates all of these components. The front-end tools establish all...
Topics: PROJECT MANAGEMENT, TRAINING ANALYSIS, MODIS (RADIOMETRY), IMAGING SPECTROMETERS, DATA BASES,...
216
216
May 23, 2011
05/11
by
Arrigo, K. R.; vanDijken, G. L.; Comiso, J. C
texts
eye 216
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Passive microwave satellite observations have frequently been used to observe changes in sea ice cover and concentration. Comiso et al. showed that there may also be a direct relationship between the thickness of snow cover (h(sub s)) on ice and microwave emissivity at 90 GHz. Because the in situ experiment of experiment of Comiso et al. was limited to a single station, the relationship is re-examined in this paper in a more general context and using more extensive in situ microwave...
Topics: SCIENTIFIC VISUALIZATION, COMPUTER PROGRAMS, DATA ACQUISITION, FRAMES (DATA PROCESSING), COMPUTER...
185
185
May 29, 2011
05/11
by
Asenov, Ase
texts
eye 185
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A 3D 'atomistic' simulation technique to study random impurity induced threshold voltage lowering and fluctuations in sub 0. 1 micron MOSFETs is presented. It allows statistical analysis of random impurity effects down to the individual impurity level-Efficient algorithms based on a single solution of Poisson's equation, followed by the solution of a simplified current continuity equation are used in the simulations.
Topics: DATA SYSTEMS, DATA STORAGE, DISPLAY DEVICES, GRAPHICAL USER INTERFACE, WORKSTATIONS, SYSTEMS...
Naval Postgraduate School
259
259
Jan 24, 2013
01/13
by
Badr, Salah M.;Berzinbs, Valdis Andris.
texts
eye 259
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Cover title
Topics: DATA BASES., JOB ANALYSIS., COMPUTER AIDED DESIGN.
80
80
Oct 4, 2015
10/15
by
Badr, Salah M.;Berzinbs, Valdis Andris.
texts
eye 80
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Cover title
Topic: DATA BASES.,JOB ANALYSIS.,COMPUTER AIDED DESIGN.
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78
Oct 4, 2015
10/15
by
Badr, Salah M.;Luqi.
texts
eye 78
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Cover title
Topic: CONFIGURATIONS.,DATA BASES.,JOB ANALYSIS.,DATA MANAGEMENT.,SOFTWARE ENGINEERING.
Cover title
Topics: CONFIGURATIONS., DATA BASES., JOB ANALYSIS., DATA MANAGEMENT., SOFTWARE ENGINEERING.
Cover title
Topics: DATA BASES., PLATFORMS., MILITARY TACTICS., COMPUTERIZED SIMULATION.
110
110
Oct 7, 2015
10/15
by
Bailey, Michael P.
texts
eye 110
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Cover title
Topic: DATA BASES.,PLATFORMS.,MILITARY TACTICS.,COMPUTERIZED SIMULATION.
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228
May 31, 2011
05/11
by
Bailey, Sheila; Raffaelle, Ryne; Emery, Keit
texts
eye 228
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A historical view of the research and development in photovoltaics from the perspective of both the terrestrial and the space communities is presented from the early days through the '70s and '80s and the '90s and beyond. The synergy of both communities in the beginning and once again in the present and hopefully future are highlighted, with examples of the important features in each program. The space community which was impressed by the light-weight and reliability of photovoltaics drove much...
Topics: AUTONOMY, INTERNATIONAL SPACE STATION, MICROGRAVITY, PROTOTYPES, DEGREES OF FREEDOM, RESEARCH AND...
437
437
Jul 26, 2010
07/10
by
Bailey, Steven A
texts
eye 437
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A multitasking, data acquisition system was written to simultaneously collect meteorological radar and telemetry data from two sources. This system is based on the personal computer architecture. Data is collected via two asynchronous serial ports and is deposited to disk. The system is written in both the C programming language and assembler. It consists of three parts: a multitasking kernel for data collection, a shell with pull down windows as user interface, and a graphics processor for...
Topics: DATA BASES, HEAT OF FORMATION, LIQUID FUELS, SPECIFIC IMPULSE, HIGH ENERGY PROPELLANTS, HYDROCARBON...
186
186
Jul 12, 2010
07/10
by
Bailey, T.; Chatburn, C. C
texts
eye 186
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The planning procedure being used to establish a technical library for the Deep Space Network support section is described. The inventory and survey methods employed are described and the preliminary results of these methods are discussed.
Topics: AGROCLIMATOLOGY, WATER RESOURCES, WETLANDS, AERIAL PHOTOGRAPHY, DATA BASES, EARTH RESOURCES...
425
425
Jun 3, 2011
06/11
by
Baker, D. L.; Beeson, H. D.; Saulsberry, R. L.; Julien, H. L.; Woods, S. S
texts
eye 425
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The development of standards and standard activities at the JSC White Sands Test Facility (WSTF) has been expanded to include the transfer of technology and standards to voluntary consensus organizations in five technical areas of importance to NASA. This effort is in direct response to the National Technology Transfer Act designed to accelerate transfer of technology to industry and promote government-industry partnerships. Technology transfer is especially important for WSTF, whose longterm...
Topics: SOLVENTS, GLOVES, GRAVIMETRY, POLYETHYLENES, POLYURETHANE RESINS, DATA BASES, LATEX
486
486
Sep 20, 2010
09/10
by
Baker, Robert L
texts
eye 486
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The objective of the Multi-Path Redundant Avionics Suite (MPRAS) program is the development of a set of avionic architectural modules which will be applicable to the family of launch vehicles required to support the Advanced Launch System (ALS). To enable ALS cost/performance requirements to be met, the MPRAS must support autonomy, maintenance, and testability capabilities which exceed those present in conventional launch vehicles. The multi-path redundant or fault tolerance characteristics of...
Topics: CERTIFICATION, COCKPIT SIMULATORS, FLIGHT SIMULATORS, HELICOPTERS, PILOT TRAINING, TRAINING...
234
234
Aug 1, 2010
08/10
by
Banks, H. T.; Propst, G.; Silcox, R. J
texts
eye 234
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Researchers consider several types of boundary conditions in the context of time domain models for acoustic waves. Experiments with four different duct terminations (hard wall, free radiation, foam, and wedge) were carried out in a wave duct from which reflection coefficients over a wide frequency range were measured. These reflection coefficients were used to estimate parameters in the time domain boundary conditions. A comparison of the relative merits of the models in describing the data is...
Topics: COMPUTATIONAL FLUID DYNAMICS, REYNOLDS NUMBER, SURFACE PROPERTIES, FLOW DISTRIBUTION, HYPERSONIC...
282
282
Jun 13, 2011
06/11
by
Barbier, Louis M
texts
eye 282
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This paper will give an overview of the NASA Universe Division Beyond Einstein program. The Beyond Einstein program consists of a series of exploratory missions to investigate some of the most important and pressing problems in modern-day astrophysics - including searches for Dark Energy and studies of the earliest times in the universe, during the inflationary period after the Big Bang. A variety of new technologies are being developed both in the science instrumentation these missions will...
Topics: RESEARCH AND DEVELOPMENT, EAR PROTECTORS, FLIGHT TESTS, ACCIDENT INVESTIGATION, ACTIVE CONTROL,...
140
140
Jun 26, 2011
06/11
by
Barshi, Immanuel; Byme, Vicky; Arsintescu, Luci
texts
eye 140
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Future space missions will be significantly longer than current Shuttle missions and new systems will be more complex than current systems. Increasing communication delays between crews and Earth-based support means that astronauts need to be prepared to handle the unexpected on their own. As crews become more autonomous, their potential span of control and required expertise must grow to match their autonomy. It is not possible to train for every eventuality ahead of time on the ground, or to...
Topics: EARTH SCIENCES, CORAL REEFS, DELTAS, DATA BASES, IMAGE ANALYSIS, INTERNATIONAL SPACE STATION,...
195
195
May 31, 2011
05/11
by
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.
texts
eye 195
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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...
650
650
Sep 20, 2010
09/10
by
Baucom, Robert M.; Marchello, Joseph M
texts
eye 650
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The process for dry powder impregnation of carbon fiber tows being developed at LaRC overcomes many of the difficulties associated with melt, solution, and slurry prepregging. In the process, fluidized powder is deposited on spread tow bundles and fused to the fibers by radiant heating. Impregnated tows have been produced for preform, weaving, and composite materials applications. Design and operating data correlations were developed for scale up of the process to commercial operation. Bench...
Topics: COMPUTER NETWORKS, SOFTWARE ENGINEERING, C (PROGRAMMING LANGUAGE), PROTOTYPES, SOURCE PROGRAMS,...
225
225
Sep 20, 2010
09/10
by
Baumeister, Joseph F
texts
eye 225
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A thermal radiation analysis method called Jet Engine IR Analysis Procedure (J-EIRP) was developed to evaluate jet engine cavity hot parts source radiation. The objectives behind J-EIRP were to achieve the greatest accuracy in model representation and solution, while minimizing computer resources and computational time. The computer programs that comprise J-EIRP were selected on the basis of their performance, accuracy, and flexibility to solve both simple and complex problems. These programs...
Topics: ATMOSPHERIC CHEMISTRY, DAYGLOW, RESONANCE SCATTERING, SOLAR SPECTRA, VOYAGER 2 SPACECRAFT,...
University of Illinois Urbana-Champaign
348
348
Jun 25, 2012
06/12
by
Belford, Geneva G. author; Day, John D. author; Grapa, Enrique. author; Schwartz, Paul M. author; University of Illinois at Urbana-Champaign. Center for Advanced Computation
texts
eye 348
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Includes bibliographic references (p. 56)
Topics: Administration and Management, Computer Systems, Files(records), Data management, Networks,...
207
207
May 22, 2011
05/11
by
Benton, E. V.; Frank, A. L.; Benton, E. R.; Csige, I.; Frigo, L. A
texts
eye 207
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This report covers the analysis of passive radiation detectors flown as part of the A0015 Free Flyer Biostack on LDEF (Long Duration Exposure Facility). LET (linear energy transfer) spectra and track density measurements were made with CR-39 and Polycarbonate plastic nuclear track detectors. Measurements of total absorbed dose were carried out using Thermoluminescent Detectors. Thermal and resonance neutron dose equivalents were measured with LiF/CR-39 detectors. High energy neutron and proton...
Topics: DATA BASES, INFORMATION DISSEMINATION, ON-LINE SYSTEMS, DOCUMENT STORAGE, DOCUMENTATION, FLIGHT...
228
228
Jun 3, 2011
06/11
by
Berry, Scott A.; Nowak, Robert J.; Horvath, Thomas J
texts
eye 228
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Active and passive methods for tripping hypersonic boundary layers have been examined in NASA Langley Research Center wind tunnels using a Hyper-X model. This investigation assessed several concepts for forcing transition, including passive discrete roughness elements and active mass addition (or blowing), in the 20-Inch Mach 6 Air and the 31-Inch Mach 10 Air Tunnels. Heat transfer distributions obtained via phosphor thermography, shock system details, and surface streamline patterns were...
Topics: DATA BASES, CERTIFICATION, POLYVINYL CHLORIDE, FLAMMABILITY, THERMOPLASTICITY, MATERIALS TESTS,...
75
75
Oct 7, 2015
10/15
by
Bhargava, H. K. (Hemant K.);Beyer, Renae M.
texts
eye 75
favorite 0
comment 0
Title from cover
Topic: SEMANTICS.,DATA BASES.,INTEGRATION.
Naval Postgraduate School
173
173
Jan 15, 2013
01/13
by
Bhargava, H. K. (Hemant K.);Beyer, Renae M.
texts
eye 173
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Title from cover
Topics: SEMANTICS., DATA BASES., INTEGRATION.
287
287
Sep 20, 2010
09/10
by
Binienda, W. K.; Arnold, S. M.; Tan, H. Q
texts
eye 287
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An essential part of describing the damage state and predicting the damage growth in a multicracked plate is the accurate calculation of stress intensity factors (SIF's). Here, a methodology and rigorous solution formulation for SIF's of a multicracked plate, with fully interacting cracks, subjected to a far-field arbitrary stress state is presented. The fundamental perturbation problem is derived, and the steps needed to formulate the system of singular integral equations whose solution gives...
Topics: ARTIFICIAL INTELLIGENCE, AUTOMATIC CONTROL, BAYES THEOREM, CLASSIFICATIONS, DATA BASES, PROBABILITY...
241
241
Jun 11, 2011
06/11
by
Bischof, c. H.; Green, L. L.; Haigler, K. J.; Knauff, T. L., Jr
texts
eye 241
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Sensitivity derivative (SD) calculation via automatic differentiation (AD) typical of that required for the aerodynamic design of a transport-type aircraft is considered. Two ways of computing SD via code generated by the ADIFOR automatic differentiation tool are compared for efficiency and applicability to problems involving large numbers of design variables. A vector implementation on a Cray Y-MP computer is compared with a coarse-grained parallel implementation on an IBM SP1 computer,...
Topics: DEOXYRIBONUCLEIC ACID, PARTICLE INTERACTIONS, THYMINE, DISSOCIATION, ELECTRON ENERGY, CROSS...
245
245
May 27, 2011
05/11
by
Bjorkman, Gerry; Cho, Alex; Russell, Carolyn; Zimmerman, Fran
texts
eye 245
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The presentation outline summarizes activities supporting the development of filler wire for 215 aluminum-lithium. The specific objective of the research was to identify an Al-Cu based filler wire chemistry which reduces weld susceptibility in 2195 Aluminum-Lithium welds and repairs welds along with providing adequate mechanical properties. This report is in viewgraph form.
Topics: AEROSPACE MEDICINE, BIBLIOGRAPHIES, DATA BASES, DOCUMENTATION, BIOLOGICAL EFFECTS
