Scientific and Technical Aerospace Reports Volume 38 July 28, 2000

More documents

Recommendations

Info

20000064063 Geophysical Observatory, Helsinki, Finland On the Connectivity Properties of the Rho-Boundary of the Unit Ball Tossavainen, Timo, Geophysical Observatory, Finland; 2000; ISSN 1239-6303; 45p; In English; Sponsored in part by Yrjo Foundation Report No.(s): Rept-123; ISBN 951-41-0868-X; Copyright; Avail: Issuing Activity In recent years, conformal mappings of subdomains of the plane have been studied from many perspectives. In the case of f : B squared (right arrow) R squared conformal, one approach is to think of the absolute value of f’ as a given ’density’ rho on B squared and then characterize properties of f by giving conditions on rho. A little surprisingly, only two simple axioms on rho are needed to recover a remarkable part of geometric function theory. Derived from text Boundaries; Conformal Mapping; Euclidean Geometry; Analysis (Mathematics) 20000064581 NASA Ames Research Center, Moffett Field, CA USA A Posteriori Error Estimation for Finite Volume and Finite Element Approximations Using Broken Space Approximation Barth, Timothy J., NASA Ames Research Center, USA; Larson, Mats G., Chalmers Univ. of Technology, Sweden; Welcome to the NASA High Performance Computing and Communications Computational Aerosciences (CAS) Workshop 2000; February 2000; In English; See also 20000064579; No Copyright; Abstract Only; Available from CASI only as part of the entire parent document We consider a posteriori error estimates for finite volume and finite element methods on arbitrary meshes subject to prescribed error functionals. Error estimates of this type are useful in a number of computational settings: (1) quantitative prediction of the numerical solution error, (2) adaptive meshing, and (3) load balancing of work on parallel computing architectures. Our analysis recasts the class of Godunov finite volumes schemes as a particular form of discontinuous Galerkin method utilizing broken space approximation obtained via reconstruction of cell-averaged data. In this general framework, weighted residual error bounds are readily obtained using duality arguments and Galerkin orthogonality. Additional consideration is given to issues such as nonlinearity, efficiency, and the relationship to other existing methods. Numerical examples are given throughout the talk to demonstrate the sharpness of the estimates and efficiency of the techniques. Additional information is contained in the original. Author Error Analysis; Errors; Estimates; Finite Element Method; Finite Volume Method; Parallel Processing (Computers) 20000064692 College of William and Mary, Dept. of Mathematics, Williamsburg, VA USA Bell-Curve Based Evolutionary Strategies for Structural Optimization, 1 Aug. 1999 - 31 Jul. 2000 Kincaid, Rex K., College of William and Mary, USA; [2000]; 4p; In English Contract(s)/Grant(s): NAG1-2077; No Copyright; Avail: CASI; A01, Hardcopy; A01, Microfiche Evolutionary methods are exceedingly popular with practitioners of many fields; more so than perhaps any optimization tool in existence. Historically Genetic Algorithms (GAs) led the way in practitioner popularity (Reeves 1997). However, in the last ten years Evolutionary Strategies (ESs) and Evolutionary Programs (EPS) have gained a significant foothold (Glover 1998). One partial explanation for this shift is the interest in using GAs to solve continuous optimization problems. The typical GA relies upon a cumber-some binary representation of the design variables. An ES or EP, however, works directly with the real-valued design variables. For detailed references on evolutionary methods in general and ES or EP in specific see Back (1996) and Dasgupta and Michalesicz (1997). We call our evolutionary algorithm BCB (bell curve based) since it is based upon two normal distributions. Derived from text Design Analysis; Genetic Algorithms; Strategy 20000065674 Joint Inst. for Nuclear Research, Bogolyubov Lab. of Theoretical Physics, Dubna, USSR Solution of the N=(0/2) superconformal f-Toda lattice Deryagin, V. B.; Leznov, A. N.; Sorin, A. S.; Dec. 31, 1998; 20p; In English Report No.(s): DE99-607978; JINR-E-2-98-49; No Copyright; Avail: Department of Energy Information Bridge The general solution of the two-dimensional integrable generalization of the f-Toda chain with fixed ends is explicitly presented in terms of matrix elements of various fundamental representations of the SL (n/n-1) supergroup. The dominant role of the representation theory of graded Lie algebras in the problem of constructing integrable mappings and lattices is demonstrated. NTIS Lattices (Mathematics); Solution 186
20000066597 Geophysical Observatory, Helsinki, Finland On Complex Differential Equations in the Unit Disc Heittokangas, Janne, Geophysical Observatory, Finland; 2000; ISSN 1239-6303; 62p; In English; Sponsored in part by Emil Aaltonen Foundation Report No.(s): Rept-122; ISBN 951-41-0867-1; Copyright; Avail: Issuing Activity This paper presents a dissertation on complex differential equations in the unit disc. The topics include: 1) Notations and background; 2) Linear first order equations; 3) Linear second order equations; 4) The equation f (sup k) + A (z)f=0; 5) Upper bounds for the absolute value of f (sup k) (z)/f (sup j)(z) in the unit disc; 6) Linear equations of arbitrary order; 7) Linear non-homogeneous equations of arbitrary order; and 8) Algebraic differential equations. CASI Differential Equations; Complex Variables; Meromorphic Functions; Analysis (Mathematics) 70 PHYSICS (GENERAL) �� 20000065659 Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA USA Clock Technology Development in the Laser Cooling and Atomic Physics (LCAP) Program Seidel, Dave, Jet Propulsion Lab., California Inst. of Tech., USA; Thompson, R. J., Jet Propulsion Lab., California Inst. of Tech., USA; Klipstein, W. M., Jet Propulsion Lab., California Inst. of Tech., USA; Kohel, J., Jet Propulsion Lab., California Inst. of Tech., USA; Maleki, L., Jet Propulsion Lab., California Inst. of Tech., USA; [2000]; 15p; In English; No Copyright; Avail: CASI; A03, Hardcopy; A01, Microfiche This paper presents the Laser Cooling and Atomic Physics (LCAP) program. It focuses on clock technology development. The topics include: 1) Overview of LCAP Flight Projects; 2) Space Clock 101; 3) Physics with Clocks in microgravity; 4) Space Clock Challenges; 5) LCAP Timeline; 6) International Space Station (ISS) Science Platforms; 7) ISS Express Rack; 8) Space Qualification of Components; 9) Laser Configuration; 10) Clock Rate Comparisons: GPS Carrier Phase Frequency Transfer; and 11) ISS Model Views. This paper is presented in viewgraph form. CASI Atomic Physics; Clocks; Laser Cooling; Technology Utilization 71 ACOUSTICS �� 20000062459 DYNACS Engineering Co., Inc., Cleveland, OH USA Influence of Mean-Density Gradient on Small-Scale Turbulence Noise Khavaran, Abbas, DYNACS Engineering Co., Inc., USA; June 2000; 18p; In English; 6th; Aeroacoustics, 12-14 Jun. 2000, Lahaina, HI, USA; Sponsored by American Inst. of Aeronautics and Astronautics, USA Contract(s)/Grant(s): NAS3-98008; RTOP 523-90-43 Report No.(s): NASA/CR-2000-210226; E-12346; NAS 1.26:210226; AIAA Paper 2000-2059; Copyright Waived; Avail: CASI; A03, Hardcopy; A01, Microfiche A physics-based methodology is described to predict jet-mixing noise due to small-scale turbulence. Both self- and shearnoise source teens of Lilley’s equation are modeled and the far-field aerodynamic noise is expressed as an integral over the jet volume of the source multiplied by an appropriate Green’s function which accounts for source convection and mean-flow refraction. Our primary interest here is to include transverse gradients of the mean density in the source modeling. It is shown that, in addition to the usual quadrupole type sources which scale to the fourth-power of the acoustic wave number, additional dipole and monopole sources are present that scale to lower powers of wave number. Various two-point correlations are modeled and an approximate solution to noise spectra due to multipole sources of various orders is developed. Mean flow and turbulence information is provided through RANS-k(epsilon) solution. Numerical results are presented for a subsonic jet at a range of temperatures 187
Page 1 and 2:
Scientific and Technical Aerospace
Page 3 and 4:
Introduction Scientific and Technic
Page 5 and 6:
Subject Divisions Table of Contents
Page 7 and 8:
ground equipment and systems. For a
Page 9 and 10:
Subject Categories of the Division
Page 11 and 12:
48 Oceanography 139 Includes the ph
Page 13 and 14:
72 Atomic and Molecular Physics 191
Page 15 and 16:
Document Availability Information T
Page 17 and 18:
Avail: NASA Public Document Rooms.
Page 19 and 20:
NASA CASI Price Tables — Effectiv
Page 21 and 22:
ALABAMA AUBURN UNIV. AT MONTGOMERY
Page 23 and 24:
��
Page 25 and 26:
20000061433 Pisa Univ., Dipartiment
Page 27 and 28:
English; 34th; 34th Thermophysics C
Page 29 and 30:
ciency of the generated derivative
Page 31 and 32:
20000063509 NASA Glenn Research Cen
Page 33 and 34:
05 AIRCRAFT DESIGN, TESTING AND PER
Page 35 and 36:
A long tradition of aerodynamic des
Page 37 and 38:
sonic and transonic cases will be p
Page 39 and 40:
20000061449 British Aerospace Publi
Page 41 and 42:
20000064593 NASA Langley Research C
Page 43 and 44:
performance required for a proposed
Page 45 and 46:
ment cost and create better product
Page 47 and 48:
tion (NPSS), is focused on the inte
Page 49 and 50:
surface measurement techniques used
Page 51 and 52:
with emphasis on the search for lin
Page 53 and 54:
20000063520 NASA Kennedy Space Cent
Page 55 and 56:
primary issues for it’s adaptatio
Page 57 and 58:
Footage shows the night vertical ta
Page 59 and 60:
20000067665 NASA Kennedy Space Cent
Page 61 and 62:
necessary for ignition modeling, or
Page 63 and 64:
engine lifetime, and high power ope
Page 65 and 66:
24 COMPOSITE MATERIALS ��
Page 67 and 68:
ments. For the screening of liner m
Page 69 and 70:
formation of a neutral, fluorescent
Page 71 and 72:
20000065655 Ames Lab., IA USA Funda
Page 73 and 74:
This is a second Triennial Conferen
Page 75 and 76:
of completely charged PSSNa solutio
Page 77 and 78:
20000064100 NASA Langley Research C
Page 79 and 80:
Spacecraft in low Earth orbit (LEO)
Page 81 and 82:
Pressure gradients, i.e. pressure h
Page 83 and 84:
agreed that the NO(sub x) levels co
Page 85 and 86:
tectural approach to extending the
Page 87 and 88:
20000064078 Physics and Electronics
Page 89 and 90:
20000064925 Institute for Human Fac
Page 91 and 92:
20000066607 Institute for Human Fac
Page 93 and 94:
20000062455 National Inst. of Stand
Page 95 and 96:
Added Analysis (Risk Reduction); 6)
Page 97 and 98:
shipboard electrical power generati
Page 99 and 100:
20000067664 Jet Propulsion Lab., Ca
Page 101 and 102:
other, The theoretical framework go
Page 103 and 104:
figures compare the lift and pitchi
Page 105 and 106:
ment phase demonstrate desired feat
Page 107 and 108:
esolution mode with resolving power
Page 109 and 110:
to track 1% or 0.5% changes was hig
Page 111 and 112:
20000067643 NASA Marshall Space Fli
Page 113 and 114:
37 MECHANICAL ENGINEERING ��
Page 115 and 116:
solver based on overset grid techno
Page 117 and 118:
20000067659 NASA Marshall Space Fli
Page 119 and 120:
20000064621 Rensselaer Polytechnic
Page 121 and 122:
that for a specific example of a be
Page 123 and 124:
km x 1000 km). As with the nearly c
Page 125 and 126:
20000064527 Analytical Imaging and
Page 127 and 128:
20000064533 Austin State Univ., Dep
Page 129 and 130:
20000064539 California Univ., Inst.
Page 131 and 132:
Page 133 and 134:
in Yellowstone National Park. We ar
Page 135 and 136:
terns of community hysteresis based
Page 137 and 138:
Page 139 and 140:
tion model (DEM) fitting to the sca
Page 141 and 142:
The Carolina slate belt is a 10- to
Page 143 and 144:
20000063373 Los Alamos National Lab
Page 145 and 146:
20000064912 New Energy and Industri
Page 147 and 148:
and discusses the issues and resear
Page 149 and 150:
The objective of this study was to
Page 151 and 152:
distributions with engine test resu
Page 153 and 154:
7.6, while the 1926 events appear t
Page 155 and 156:
We investigate the compositional di
Page 157 and 158: Flight Center, USA; Moore, T. E., N
Page 159 and 160: This report presents the Applied Me
Page 161 and 162: in Goa, India, by 3 - 4 days. Wind
Page 163 and 164: 51 LIFE SCIENCES (GENERAL) Includes
Page 165 and 166: 20000062717 Joint Inst. for Nuclear
Page 167 and 168: 20000064015 Institute for Human Fac
Page 169 and 170: during 50% (SD 4%) of the breathing
Page 171 and 172: 20000064711 Massachusetts Inst. of
Page 173 and 174: The analysis of this smaller data s
Page 175 and 176: vided a functional helmet mount. Th
Page 177 and 178: 61 COMPUTER PROGRAMMING AND SOFTWAR
Page 179 and 180: The goal of multi-image classificat
Page 181 and 182: 20000063526 Defence Science and Tec
Page 183 and 184: 85 dB amplifier design evolved by o
Page 185 and 186: 20000064594 New Mexico Univ., Elect
Page 187 and 188: 20000064615 NASA Ames Research Cent
Page 189 and 190: declarations with a pattern recogni
Page 191 and 192: containing point where interpolatio
Page 193 and 194: has his own responsibility, while t
Page 195 and 196: the people, documents and projects
Page 197 and 198: and experimental technology, many o
Page 199 and 200: tems. In particular this applicatio
Page 201 and 202: Over the past decade, high performa
Page 203 and 204: expensive than a single analysis. I
Page 205 and 206: 20000064726 Carnegie-Mellon Univ.,
Page 207: 20000064099 Teledyne Brown Engineer
Page 211 and 212: 20000065633 Institute TNO of Applie
Page 213 and 214: important conclusion is that for su
Page 215 and 216: est frame of the string. The modifi
Page 217 and 218: isotopes. The method and program we
Page 219 and 220: A detailed study is undertaken, usi
Page 221 and 222: 20000063497 Kaiser Electro-Optics,
Page 223 and 224: delivers 60% of the x-ray flux from
Page 225 and 226: 76 SOLID-STATE PHYSICS ��
Page 227 and 228: 20000064660 Abdus Salam Internation
Page 229 and 230: 20000067648 NASA Marshall Space Fli
Page 231 and 232: 20000064703 Institute of Atomic Ene
Page 233 and 234: The BRST approach is applied to the
Page 235 and 236: 20000067671 Hampton Univ., VA USA A
Page 237 and 238: 82 DOCUMENTATION AND INFORMATION SC
Page 239 and 240: ecoming almost too cumbersome to be
Page 241 and 242: physical world. These are the two p
Page 243 and 244: with WFPC2 data. Tests of HSTphot
Page 245 and 246: A brief description is given of the
Page 247 and 248: 20000064070 NASA Ames Research Cent
Page 249 and 250: gas, show variations that have rema
Page 251 and 252: egy, called Power In that would all
Page 253 and 254: 20000065631 NASA Kennedy Space Cent
Page 255 and 256: 20000064089 Smithsonian Astrophysic
Page 257 and 258: A ABERRATION, 143, 198 ABRASION, 22
Page 259 and 260:
COMPRESSIBLE FLOW, 83 COMPRESSION L
Page 261 and 262:
FATIGUE (MATERIALS), 50, 93, 96 FAT
Page 263 and 264:
LASING, 90 LATE STARS, 224 LATITUDE
Page 265 and 266:
PATCH ANTENNAS, 74 PATHOLOGY, 98 PA
Page 267 and 268:
SPACE PLATFORMS, 38 SPACE PROBES, 2
Page 269 and 270:
WIND PROFILES, 137 WIND TUNNEL TEST
Page 271 and 272:
Brown, Andy, 38 Brown, April S., 20
Page 273 and 274:
Grosvenor, C. A., 70 Grosvenor, J.
Page 275 and 276:
Lu, Gui-Ying, 50 Lugg, Desmond J.,
Page 277 and 278:
Robertson, Tony, 39 Robinson, Jeffr
Page 279:
Warner, J. D., 63 Warren, James, 16
show all

Scientific and Technical Aerospace Reports Volume 38 July 28, 2000

Create successful ePaper yourself

Delete template?

Save as template?