Lapas attēli

of 1,3-butadiene with CdS(e) of 9 plus or minus 4/atm at 293 K. Surface interactions that may contribute to the observed PL changes are discussed.


N89-28416# International Centre for Theoretical Physics, Trieste (Italy). DIFFERENTIAL GEOMETRIC ASPECTS OF THE THEORY OF FERROELECTRICITY V. T. Khosiainov Nov. 1988 12 p Submitted for publication (DE89-612191; IC-88/365) Avail: NTIS (US Sales Only) HC A03/MF A01

In connection with the problem of the ferroelectricity a differential formalism is developed as a tool to describe the fine electronic properties in solids. This includes the gauge invariant definition of the differentiation in k-space (position operator), the notion of holonomy group and characteristic gauge field in k-space of electron states. A variational principle and possible solutions of resulting field equations are discussed. A criterion for the appearance of the ferroelectricity is proposed.


N89-28420# Rensselaer Polytechnic Inst., Troy, NY. Dept. of Chemistry. DECOMPOSITION KINETICS AND FILM FORMATION OF AN ORGANOMETALLIC PRECURSOR TO SIC ON SI(100) Technical Report No. 6 Leonard Interrante, Wei Lee, Klaus Lenz, Krishna Rajan, and John B. Hudson 15 May 1989 23 p Submitted for publication (Contract N00014-85-K-0632; NSF CHE-84-06078) (AD-A208384; TR-6) Avail: NTIS HC A02/MF A01 CSCL 07/2

The absorption and decomposition kinetics of the SiC precursor (CH3Si(H)mu(CH2)2Si(CH3) CH2SIH2CH3) have been studied on the Si(100) surface using a combination of molecular beam mass spectrometry and Auger electron spectroscopy. The intact precursor adsorbs with a heat of adsorption of about 10 kcal/mol. The decomposition rate becomes measurable at about 800 K, and increases with increasing temperatures. The resulting films are stoichiometric, polycrystalline Sic, with partial epitaxial orientation relative to the substrate.


37 p

N89-28417# Brasilia Univ. (Brazil). Dept. de Fisica.
C. Rodrigues-Costa and O. A. C. Nunes Sep. 1988
Submitted for publication
(DE89-612214; UnB-FIS-10/88) Avail: NTIS (US Sales Only)
HC A03/MF A01

The theory of the photo-drag effect in magnetic semiconducting crystals is considered using the s-d (or s-f) exchange model of interaction between the electron and the magnon. An equation is derived for the electric field generated by this effect. Numerical examples are given for CdCr2SE4 crystals.


N89-28418# Joint Inst. for Nuclear Research, Dubna (USSR).
Lab. of Nuclear Problems.
S. Sahling 1988 8 P Submitted for publication
(DE89-613399; JINR-E-8-88-638) Avail: NTIS (US Sales Only)
HC A02/MF A01

Long time power released in YBa2Cu307 after rapid cooling from the equilibrium temperature T sub 1 (2.35 K less than or equal to T sub 1 less than or equal to 15.11 K) to T sub 0 = 1.5 K and the heat capacity (1.2 K less than or equal to T less than or equal to 100 K) were measured. The observed power release is similar to those of amorphous solids. The resulting density of states of two level systems is close to the values obtained from heat capacity and acoustic measurements from heat capacity and acoustic measurements.


N89-28421# Hypress, Inc., Elmsford, NY. MM WAVECOMPONENTS - SIS (SUPERCONDUCTOR-INSULATOR-SUPERCONDUCTOR) MIXERS Final Report, Nov. 1986 - Dec. 1988 Stephen R. Whiteley 26 Apr. 1989 50 p (Contract F49620-87-C-0014; AF Proj. 3005) (AD-A208632; AFOSR-89-0620TR) Avail: NTIS HC A03/MF A01 CSCL 09/1

Superconductor-Insulator-Superconductor (SIS) tunnel junction mixers are known to provide ultra-high sensitivity receiver applications above 30 GHz. In this two year (Phase 2) program, HYPRES, in collaboration with the National Radio Astronomy Observatory, developed novel fully integrated SIS mixer circuits, and demonstrated a unique high efficiency cooling system. The integrated SIS mixer chip contains, aside from the actual mixer elements, passive tuning components, an IF filter, a coplanar transmission line, and a waveguide coupler, necessary components heretofore realized off-chip. Fabrication of the integrated mixer required development of a nine level process and optimization of the process dependent electrical parameters of the SiS devices. The device performs efficiently in the range of 75-115 GHz. A novel dewar-based cooler, which makes use of the extremely low thermal conductivity of the fused silica chip substrate to achieve an incremental thermal load of 25 mW, was fabricated and demonstrated. Such a cryostat allows relatively long term unattended operation of SIS, or other, cryogenic devices. GRA

19 p

10 p

N89-28419# Wisconsin Univ., Madison. Dept. of Chemistry.
Report, 31 Oct. 1988
Gerald J. Meyer, Larry K. Leung, Jim C. Yu, George C. Lisensky,
and Arthur B. Ellis 12 May 1989

Submitted for publication (Contract N00014-85-K-0631) (AD-A208348; UWIS/DC/TR-89/3) Avail: NTIS HC A03/MF A01 CSCL 07/2

Direct evidence for adduct formation between butenes and etched, single-crystal n-CdS and n-CdSe(CdS(e)) surfaces has been obtained from photoluminescence (PL) measurements. Exposure of Cos(e) to butenes causes enhancement of the solids' band edge PL relative to a N2 ambient. For 30 percent mixtures of the olefins in N2, the magnitude of the enhancement follows the order, 1,3-butadiene is greater than cis-2-butene trans-2-butene is greater than isobutylene 1-butene, and correlates with the olefin basicities, based on photoionization potentials. Enhancements in PL intensity can be fit to a dead-layer model, allowing the determination of the reduction in depletion width in the semiconductor resulting from olefin exposure; depletion width reductions reach a few hundred Angstroms for adducts of 1,3-butadiene with CdS(e). The PL changes were used in conjunction with the Langmuir adsorption isotherm model to yield equilibrium constants for adduct formation

N89-28422# Naval Weapons Center, China Lake, CA. Chemistry
D. O. Kipp, C. K. Lowe-Ma, and T. A. Vanderah 1988
Presented at the Materials Research Society Meeting, San Diego,
CA, 24-28 Apr. 1989 Sponsored by ONR
(AD-A208723) Avail: NTIS HC A02/MF A01 CSCL 07/4

Non-oxide inorganic compounds such as sulfides, phosphides, and mixed-anion sulfide-phosphides are of interest as possible infrared window materials. Our research on the solid state chemistry and structure-property relationships of these materials includes the directed synthesis of new compounds as well as the study of compounds that have been reported in the literature but which have been incompletely characterized for this application. The present work includes investigations of three ternary sulfide systems: ZnGa2S4, Aln2S4(A = Ca, Sr, Ba), and CaY2S4. Samples were prepared in polycrystalline form and/or as crystals. New compounds were obtained in our studies of the Caln2S4, Srin2S4, and CaY2S4 systems. Compounds were characterized by X-ray diffraction, elemental analysis, Fourier Transform Infrared Radiometry, and thermogravimetric analysis.

GRA N89-28423# Brown Univ., Providence, RI. Dept. of Chemistry. GROWTH AND CHARACTERIZATION OF ZINC SULFIDE FILMS BY CONVERSION OF ZINC OXIDE FILMS WITH H2S Y-M. Gao, P. Wu, J. Baglio (GTE Labs., Inc., Waltham, MA.), Kirby Dwight, and A. Wold 30 May 1989 9p Sponsored in part by Eastman Kodak Co., Rochester, NY (Contract N00014-85-K-0177; NSF DMR-88-03184) (AD-A208727; TR-11) Avail: NTIS HC A02/MF A01 CSCL 20/12

Zinc sulfide is an IR window material and a transparent semiconductor with a large direct band gap. It also possesses piezoelectric, photoconductive and electroluminescent properties. Thin films of zinc sulfide can be utilized for infrared antireflection coatings, Light-Emitting Diodes (LEDs), electroluminescent (EL) displays, multilayer dielectric filters, optical phase modulation and light guiding in integrated optics. In recent years, there has been a large amount of effort directed at the growth of high quality films of ZnS. Various fabrication techniques have been employed, such as ion beam sputtering, Atomic Layer Epitaxy (ALE), Molecular Beam Epitaxy (MBE), metal organic chemical vapor deposition and spray pyrolysis. Zinc sulfide films were prepared by conversion of zinc oxide films in the presence of hydrogen sulfide. The films which contained both the hexagonal and cubic forms of zinc sulfide were shown to be uniform and gave a measured band gap of 3.65 eV. The electrical resistances of the films prepared were greater than 10 to the 7th ohms.


N89-28426# Massachusetts Inst. of Tech., Lexington. Lincoln Lab. SOLID STATE RESEARCH Quarterly Technical Report, 1 May - 31 Jul. 1988 Alan L. McWhorter 7 Mar. 1989 100 p (Contract F19628-85-C-0002) (AD-A209645; Rept-1988; Rept-3; ESD-TR-88-209) Avail: NTIS HC A05/MF A01 CSCL 20/12

The Solid State division of Lexington Lincoln Lab reports on its progress for this quarter. The areas of study are: Time Dye Laser Using Integrated Optics; Gap Microlenses by Mass Transport; A New OMVPE Reactor for Growth of InP and Related Alloys; Microchannel Heat Sinks for Two-Dimensional High Power-Density Diode Laser Arrays; Novel Scalloped-Mirror Diffraction-Coupled Laser Arrays; Three-Mirror Ti:A1203 Ring Laser Cavity; Femtosecond TiA1203 Injection-Seeded Laser; End-Pumped Nd:LaF3 and Nd:LaMgA11019 Lasers; Single Frequency Mixing of Frequency Modulated Laser Radiation; Vertical Rotating Disk OMVPE Reactor; New Electron Beam Lithography System; Dry Etching Induced Damage on Vertical Sidewalls of GaAs Channels; Homoepitaxial Semiconducting Diamond; 420 X 420 CCD Frame Transfer Imager; Technique for Monolithically Integrating GaAs/ AIGaAs Lasers of Different Wavelengths; Superconducting Thin Films of BiSrCaCuO; and Nb Thin Film Capacitors for Superconductive Circuits.


13 p

18 p

N89-28424# Brown Univ., Providence, RI. Dept. of Chemistry. PREPARATION AND CHARACTERIZATION OF SEVERAL CONDUCTION TRANSITION METAL OXIDES Aaron Wold and Kirby Dwight 24 May 1989 (Contract N00014-86-K-0234) (AD-A208895; TR-21) Avail: NTIS HC A03/MF A01 CSCL 20/12

The structure-property relationships of several conducting transition metal oxides, as well as their preparative methods, are presented. The importance of preparing homogenous phases with precisely known stoichiometry is emphasized. A comparison is also made of the various techniques used to prepare both polycrystalline and single crystal samples. For transition metal oxides, the metallic properties are discussed either in terms of metal-metal distances which are short enough to result in metallic behavior, or in terms of the formation of a conduction band resulting from covalent metal-oxygen interactions. Metallic behavior is observed when the conduction bands are populated with either electrons or holes. The concentration of these carriers can be affected by either cation or anion or anion substitutions. The discussion in this presentation will be limited to the elements Re, Ti, V, Cr, Mo and Cu.


N89-28427# Pittsburgh Univ., PA. Surface Science Center. THE ORIENTATION OF CHEMICAL BONDS AT SURFACES: A KEY TO UNDERSTANDING THE STRUCTURE AND BONDING OF SURFACE SPECIES Final Report, 15 Apr. 1986 - 14 Apr. 1989 John T. Yates, Jr. 22 Jun. 1989 (Grant AF-AFOSR-0107-86; AF Proj. 2303) (AD-A209833; AFOSR-89-0928TR) Avail: NTIS HC A02/MF A01 CSCL 20/2

The development and use of the digital ESDIAD method for studying the molecular structure and the dynamics of adsorbates on metal single crystal surfaces is examined. A number of new findings were made involving the following phenomena: (1) First direct observation of the hindered rotation of a chemisorbed molecule; (2) Observation of hydrogen bonding forces between adsorbates causing hinderance of molecular rotation; (3) Structural determination of bonding site for coordinatively unsaturated radical species, PF2 and PF on Ni(111); (4) Discovery of alkali metal sensitization of H+ ESD yield on metals; and (E) Discovery of copious metastable CO yield in ESD from CO on Pt(111). GRA

N89-28425# Massachusetts Inst. of Tech., Cambridge. Dept. of
Mechanical Engineering.
SLIP SYSTEMS Interim Technical Report No. 20, 1988 - 1989
David M. Parks and Said Ahzi 29 May 1989 45 p
(Contract N00014-86-K-0768)
(AD-A208902) Avail: NTIS HC A03/MF A01 CSCL 20/2

The kinematic constraints are elucidated, and the corresponding kinematic indeterminacy of part of the deviatoric stress tensor, in a rigid-viscoplastic single crystal lacking five independent slip systems. The indeterminate stress component is a Lagrange multiplier enforcing the kinematic constraint, and it must be determined from equilibrium considerations. A simple polycrystalline model is constructed which precisely satisfies local kinematic constraints as well as global compatibility. Volume-average global stresses are obtained by approximating the local constraint stress as the corresponding projection of the (to-be-determined) global stress. Applications of the model to hexagonal crystals without pyramidal slip, and to large deformation and texturing of orthorhombic polycrystalline materials (olivine; HDPE) are made.


N89-28428# Princeton Univ., NJ. Dept. of Electrical Engineering and Computer Science. TRANSPORT AND SUBMILLIMETER WAVE SPECTROSCOPY OF GaAs/AI SUB xGa SUB 1-XAS HETEROSTRUCTURES Final Report, Jul. 1985 - Sep. 1988 D. C. Tsui 16 Jun. 1989 43 p (Grant AF-AFOSR-0204-85; AF Proj. 2305) (AD-A209836; AFOSR-89-0934TR) Avail: NTIS HC A03/MF A01 CSCL 20/12

The research emphasized the physics of the electronic processes in GaAs/Al(x)Ga(1-x)As and In(x)Ga(1-x)As/InP heterojunction thin film structures and focuses in two directions: one in superlattice materials and the other in submillimeter wave spectroscopy. After a brief description of the accomplishments in both directions, together with a list of the publications of work supported by the contract, a detailed account is made of the systematic investigation of transport through in(x)Ga(1-x)As/InP superlattices grown by Chemical Beam Epitaxy.


N89-28429# Stanford Univ., CA. Solid-State Electronics Lab. DEVELOPMENT OF SUPERLATTICES FOR ULTRA HIGH-SPEED ELECTRONIC AND OPTOELECTRONIC DEVICES Final Technical Report, 1 Apr. 1986 - 31 Mar. 1989 James S. Harris 31 Mar. 1989 99 p (Contract N00014-86-K-0530) (AD-A209874) Avail: NTIS HC A05/MF A01 CSCL 20/12



Includes quantum mechanics; theoretical physics; and Bose and Fermi statistics.

For related information see also 25 Inorganic and Physical Chemistry and 34 Fluid Mechanics and Heat Transfer.

The remarkable advances in computation and communications technologies in the last half century have been made possible by the invention and development of a vast array of solid state electronic and optical devices. By striving to achieve higher speeds of operation, and greater levels of integration, ever more powerful computing and communications tools have been created. The transistor, the laser and a host of other devices have been invented and reinvented many times in a multitude of materials systems. As materials growth and fabrication technologies continue to improve, it becomes possible to use new physical phenomena in solid state devices, in addition to optimizing the performance of existing devices. Optical interconnects are attracting attention as a means to overcome the interconnection bottleneck in high speed electronic systems. The best type of light source for such schemes is sometimes a continuous-wave laser used in conjunction with a light modulator, which acts as an external switch. Modulators that operate in perpendicular geometry, with light directed normal to the plane of the device, allow simple fabrication of two-dimensional arrays: these are of interest for multiple parallel optical interconnections and for optical information processing. GRA

N89-28432# Sandia National Labs., Albuquerque, NM. REAL GAS EQUATIONS OF STATE FOR CHEMKIN P. Barry Butler Mar. 1989 40 p (Contract DE-AC04-76DP-00789) (DE89-012794; SAND-88-3118) Avail: NTIS HC A03/MF A01

CHEMKIN is a chemical kinetics FORTRAN program developed to treat the gas-phase kinetics and associated thermodynamics for a set of user-defined chemical reactions. A key assumption made in CHEMKIN is that the gas behaves as a perfect gas, a restriction that results in noninterference of the individual species in a gas mixture (i.e., partial molal properties equal specific properties of pure component). Recently, the code was modified to account for real gas behavior according to the general limit method. The appropriate departure integrals for two real gas equations of state were calculated and included in a modified version of the code. The equations of state considered in this work were: a constant-covolume Noble-Abel function, and the Becker-Kistiakowsky-Wilson formulation.


N89-28430# Manchester Coll. of Science and Technology (England). Dept. of Chemistry. ZINC TELLURIDE GROWTH ON InP Annual Report J. O. Williams and Nicholas Maung 14 Jan. 1989 51 p (Grant AF-AFOSR-0109-88; AF Proj. 2301) (AD-A209924; EOARD-TR-89-09) Avail: NTIS HC A04/MF A01 CSCL 20/12

Initial studies have concentrated on the preparation of epitaxial Zinc Selenide on Indium Phosphide (100) substrates and an optimum bakeout procedure for the substrates determined. Subsequently, the doping of ZnSe with small amounts of Tellurium (up to ca 5 at percent) was achieved and the structural, compositional and optical properties of the epitaxial layers investigated. It was demonstrated by photoluminescence measurement that in small concentrations Te acts as an isolated isoelectronic trap in ZnSe and at higher concentrations clusters of Te atoms form. This results in broadened photoluminescence emission peaks. It proved impossible with our atmospheric pressure MOCVD reactor and using a conventional source of Te to prepare epitaxial layers of the ternary ZnSe(1-y)Te(y) with Te concentration in excess of ca 5 at percent.


N89-28431# Massachusetts Inst. of Tech., Lexington. Lincoln Lab. SOLID STATE RESEARCH Quarterly Technical Report, 1 Aug. - 31 Oct. 1988 Alan L. McWhorter 15 Nov. 1988 84 p (Contract F19628-85-C-0002) (AD-A209969; Rept-88-4; ESD-TR-88-250) Avail: NTIS HC A05/MF A01 CSCL 20/3

The solid state research of the Lexington Lincoln Lab is review for this time period. Areas of study are: Microwave Bandpass Modulators in Lithium Niobate; Surface Energy and Temperature Effect on Etched Structures in Compound Semiconductors Model of the Mass Transport Phenomenon; Kinetics of Mass Transport of Etched Structures in InP Due to Surface Energy Minimization; A Simple Model of Amplified Spontaneous Emission Spectral 'Narrowing High Power, Diffraction Limited, Narrowband External Cavity Diode Laser; Si-on-Insulator Films Prepared by Zone Melting Recrystallization with Enhanced Radiative Heating; Selective Plasma Etching of Si from GaAs-on-Si Wafers; Selective Area Laser Photodeposition of Transparent Conductive SnO2 Films; Electrical Characteristics of Ultrashallow Junction Diodes Fabricated by Laser Doping; Patterned Excimer Laser Etching of GaAs Within a Molecular Beam

Epitaxy Machine; PBT Amplification at 94 GHz; A 64 X 64-Pixel Back Illuminated CCD Imager with Low Noise and High Frame Rates; High Speed Resonant Tunneling Diodes Made from the Pseudomorphic In(0.53)Ga(0.47) As/AIAS System; Superconductive Nb Thin Film Capacitors with Ta205 Dielectric; Deposition of YBa2Cu3Ox Films by Sequential RF Diode Sputtering; and Microwave Surface Resistance of BiSrCaCuo Films.


N89-28433# Colorado State Univ., Fort Collins. Dept. of Chemical
CHEMICAL EQUILIBRIA Progress Report, 1 Jul. 1986 - 30
Jun. 1989
Terry G. Lenz and John D. Vaughan 1989 62 p
(Contract DE-FG02-86ER-13582)
(DE89-014535; DOE/ER-13582/T2) Avail: NTIS HC A04/MF

The research involves developing general computational methods for predicting the thermodynamic properties of condensed state chemically reactive systems. The overall effort has encompassed both computer studies, and parallel laboratory experimental work to support the evolving computational models. To date, the soundness of molecular mechanics/force-field techniques were demonstrated for accurate prediction of the thermodynamic properties of chemically reactive systems. Extensive work was done with three molecular mechanics models, Boyd's MOLBD3, Allinger's MMP2 and the Warshel/Lifson/Karplus QCFF/PI program. Not one of these programs at present has general full thermodynamic output capability. Modification of the QCFF/PI is well on its way to full thermodynamic capability. Supporting laboratory studies have involved careful bomb calorimetry for H(sub fo information, X-ray structure determination for accurate molecular geometry data, and kinetics/equilibrium determinations for various prototypical Diels-Alder reactions. Vapor pressure studies for candidate Diels-Alder compounds are also underway. The bomb calorimetric and greater initial effort on vapor pressure studies have replaced the original solvent effect and hindered rotation NMR studies planned, on the basis of most critical data needs for correct computational model development.


6 P

N89-28434# Los Alamos National Lab., NM.
J. W. Shaner 1989

Presented at the 10th Symposium on Thermophysical Properties, Gaithersburg, MD, 20-23 Jun. 1989 (Contract W-7405-eng-36) (DE89-014228; LA-UR-89-2105; CONF-8906164-1) Avail: NTIS HC A02/MF A01

The primary motivations for trying to measure thermophysical properties of materials on subsecond timescales are to extend measurements to higher temperatures than can be conveniently maintained continuously, or to make measurements on systems out of thermodynamic equilibrium. Since these measurements are difficult, one must keep in mind the needs for the data. These include the ability to use materials cleverly in new high-pressure/high-temperature applications, as well as the development of calibrated models for the response of materials to rapid energy deposition, by laser pulses, for example. Several key areas have been identified in which effort is needed for substantial progress in subsecond measurements, and which have unusual promise for useful new scientific results. These areas include the problems of high-temperature standards, equilibration during rapid heating, measurements at higher temperatures combined with higher pressures, measurements on specific interesting materials, and measurement of microstructural properties at high temperature and their relation to macroscopic response. Each of these areas will be touched upon here. DOE

Ballistic Data; Image complexity Measures and Edge Detection; Advanced Gun Gas Diversion; A Physical and Numerical Study of Pressure Attenuation in Solids; Pyroelectric Sensing for Potential Multi

Mode Use; Gaseous Fuel Injection and Mixing in a Supersonic Combustor; Systems Effectiveness for Targets with Repair or Replacement; A Pattern Recognition Application in Elastic-Plastic Boundary Element, Hybrid Stress Analysis; Vectorized Perturbed Functional Iterative Scheme (VPFIS): A Large Scale Nonlinear System Solver; Liquid Film Cooling in Rocket Engines; Estimation of Autocorrelation and Power Spectral Density for Randomly Sampled Systems; Fracture in Solid Propellant: Damage Effects upon Crack Propagation; Novel Conversion of Organometallics to Energetic Nitro Compounds; Correlations of Spontaneous Ignition Temperatures with Molecular Structures of Flammable with Molecular Structures of Flammable Compounds; The Estimation of Stature from Fragments of the Femur: A Revision of the Steele Method; Effects of Water Solubility and Functional Group Content on the Interactions of Organic Solutes with Soil Organic Matter, A Study of Semihardened Concrete Arch Structure Response Under Protective Layers; and Stress Wave Propagation in Layered Media.


9 p

526 p

N89-28435# Los Alamos National Lab., NM.
R. S. Hixson and M. A. Winkler 1989

Presented at the AIRAPT and EHPRG International High Pressure Science and Technology Conference, Paderborn, Federal Republic of Germany, 17 Jul. 1989 (Contract W-7405-eng-36) (DE89-014288; LA-UR-89-2150; CONF-890798-1-Vugraphs) Avail: NTIS HC A02/MF A01

Thermophysical properties of most liquid metals are difficult to measure because of the very high temperatures and pressures required, but they are important for several reasons. These include understanding the fundamental physics of liquid metals and experimental modeling and design of exploding wires, foils and fuses. The melting points of all but a few metals are at high temperatures, with many exceeding 2000 K. The critical points of most metals exceed temperatures and pressures that may be easily achieved in static high-pressure systems. Because of the limitations on temperatures that may be reached in static high-pressure experiments, various dynamic techniques have been developed to study liquid metals. We use a resistive pule heating method in which a cylindrical wire-shaped sample is made to expand along a isobaric path. During an experiment the sample is heated, made to melt, and enthalpy, temperature, and specific volume are measured. After the liquid end state is reached, a single sound speed measurement per experiment is made. From these fundamental properties, other properties such as thermal expansion coefficient bulk modulii, and compressibilities may be calculated. Here we report measurements that we have recently made on liquid niobium.


N89-28437# Universal Energy Systems, Inc., Dayton, OH.
PROGRAM FOR 1987, VOLUME 3 Interim Report
Rodney C. Darrah Apr. 1989
(Contract F49620-85-C-0013)
(AD-A209728; AFOSR-89-0831TR-Vol-3) Avail: NTIS HC
A23/MF A01 CSCL 05/1

The U.S. Air Force Research Initiation Program has caused study in many areas. This is volume 3 of 4. Some areas of study are: A Numerical Study of the Flow Field and Heat Transfer in a Rectangular Passage with a Turbulator, Analysis of an Algorithm for Multiple Frequency Resolution; Signal Processing in EW Environment; Implementation of Blackboard Systems in Ada; Surface States and Electron Transport Properties in Semi-Insulating Gallium Arsenide; Investigate Feasibility of Implementing Associative Memories Using Luminescent Rebroadcasting Devices; Automated Translation of Digital Logic Equation into Optimized VHDL Code; Analytical Model and Computer Program of F-16 Nose Gear and F-16 ALGS; Development of a Technique for Prediction of Internal Heat Transfer in Actively Cooled Structures; Radiation Hypersonic Aerodynamics; A Chemical Kinetics Model for Mach 5 to 14 Hypersonic Flow; Development of a Microcomputer Lateral Resupply Simulation System; Development of Expert System Control of a Carbon Fiber Production Process; Influence of Microstructural Variations on the Thermomechanical Processing in Dynamic Material Modeling of Titanium Aluminides; Studies on the Compatibility of Potential Matrix and Reinforcement Materials in Ceramic Composites for High Temperature, Aerospace Applications; Synthesis of Compounds Capable of Intramolecular Cyclization - Aromatization Reactions; Leaky Rayleigh and Lamb Waves on Composites; and Performance Improvement in Knowledge-Based Process Control Systems.



Includes educational matters.

No abstracts in this category.



Includes management planning and research.

N89-28436# Universal Energy Systems, Inc., Dayton, OH.
PROGRAM FOR 1987, VOLUME 1 Interim Report
Rodney C. Darrah Apr. 1989 782 p
(Contract F49620-85-C-0013)
(AD-A209726; AFOSR-89-0329TR-Vol-1) Avail: NTIS HC
A99/MF E03 CSCL 05/1

The U.S. Air Force Research Initiation Program has caused study in many areas. This is volume 1 of 4 volumes. Some areas studied are: Effects of Bending Flexibility on the Aerodynamic Characteristics of Slender Cylinders Determined from Free Flight

N89-28438# Universal Energy Systems, Inc., Dayton, OH.
PROGRAM FOR 1987, VOLUME 4 Interim Report
Rodney C. Darrah Apr. 1989 783 p
(Contract F49620-85-C-0013)
(AD-A209729; AFOSR-89-0832TR-Vol-4) Avail: NTIS HC
A99/MF E03 CSCL 05/1

The U.S. Air Force Research Initiation Program has caused study into many areas. This is volume 4 of 4. Some areas of study are: Development of Implantable Devices for Sustained Delivery of Volatile Hydrocarbons in Rats; In Situ Detection of Osteoprogenitor Cells in an Actively Growing Bone System; Trauma Activated Periosteum Derived Osteogenic Cells: Response to Selected Growth Factors; Assessing the Attributes of Expert Judgement: Measuring Bias in Subjective Uncertainty Estimates; Mathematical Modeling; Learning Behavior of Adaptive Filters for Evoked Brain Potentials; The Rhetoric of Hypertext: An Examination of Document Database Concepts and The Integrated Maintenance Information System; Structural Representations of MultiDimensional Criterion Construct Space; Comparison of Supervisor's and Incumbent's Estimates of SDy; The Role of Fourier Descriptions for Shape in Visual Form Perception; Comprehensibility of Technical Test; Mechanisms of Contrast and Lightness Constancy; Phytotoxicity of Soil Residues of JP-4 Aviation Fuel; The Contracting Out of In-House Analytical Services at the USAF Occupational and Environmental Health Laboratory-Brooks AFB, San Antonio, Texas; Effects of Metal Mutagens on the Synthesis and Accumlation of Macromolecules; Development of a Rapid and Sensitive Assay Procedure for the Detection of the Protozoan Parasite Giardia Lamblia in Drinking Water; Limitations to Heavy Work of Personnel Wearing at 21 C: U.S. Military Chemical Defense Ensemble.


base was transferred from the JSC computer to personal computers at George Washington University (GWU). GWU also performed a range of related activities such as conducting in-depth searches on a variety of subjects, retrieving scientific literature, preparing presentations, summarizing research progress, answering correspondence requiring reference support, and providing writing and editorial support.


117 p

N89-28441# National Inst. of Standards and Technology,
Gaithersburg, MD. Information Resources and Services Div.
CENTER Final Report
Diane Cunningham Nov. 1988
(PB89-160014; NIST/SP-753; LC-88-600602) Avail: NTIS HC
A06/MF A01 CSCL 05B

Data bases available online at the National Institute of Standards and Technology (NIST) Research Information Center are listed by acronym and by full title. In addition, descriptions of the data bases, periods of coverage, producers, corresponding hard copy titles and principal sources and vendors are listed. A general subject index and a cross reference index are also supplied. Author

137 p

N89-28439# Department of Defense, Washington, DC.
5 May 1989

Superseded report dated 15 Mar. 1989, AD-A206130 (AD-A210170) Avail: NTIS HC A07/MF A01 CSCL 15/3

Public Law 100-456, the National Defense Authorization Act for Fiscal Year 1989, authorizes a report to Congress annually of a Critical Technologies Plan. This is the first such submission. It is the result of a series of meetings involving representatives of the military departments and defense agencies with responsibilities for science and technology programs, and representatives from the Department of Energy, Assistant Secretary for Defense Programs. The scope of the report is defined and outlined, the DoD planning process for science and technology, selection criteria for critical technologies are presented. Technologies related to nuclear weapons and their effects, because of their special nature, are not included in this plan. Critical technologies are technologies with great promise of ensuring the long-term superiority of the United States weapon system. The following critical technologies were selected: Microelectronic Circuits and Their Fabrication, Preparation of GaAs and Other Compound Semi-Conductors, Software Producibility, Parallel Computer Architectures, Machine Intelligence/Robotics, Simulation and Modeling, Integrated Optics, Fiber Optics, Sensitive Radars, Passive Sensors, Automatic Target Recognition, Phased Arrays, Data Fusion, Signature Control, Computational Fluid Dynamics, Air Breathing Propulsion, High Power Microwaves, Pulsed Power, Hypervelocity Projectiles, High Temperature/High Strength/Light Weight Composite Materials, and Superconductors.


N89-28442# Naval Postgraduate School, Monterey, CA.
Michael L. Williamson Dec. 1988 89 p
(AD-A207380) Avail: NTIS HC A05/MF A01 CSCL 12/5

This research is an implementation of the data definition facility for the Graphics Language for Database (GLAD). GLAD is a graphics-oriented database management system which is primarily concerned with ease of learning and efficiency of use. The system uses an object-relationship approach to data base design. Entities of the database are represented graphically as objects. With this method, users can visualize the schema of the database and can quickly comprehend how the entities relate. Every effort was made to design GLAD so that a new user can quickly learn to create and manipulate a database without the need of a dedicated database administrator.




Includes information management; information storage and retrieval technology; technical writing; graphic arts; and micrography.

For computer documentation see 61 Computer Programming and Software.

N89-28440*# George Washington Univ., Washington, DC. (DATA BASE DEVELOPMENT AND RESEARCH AND EDITORIAL SUPPORT) Final Report, 17 Apr. 1978 - 30 Jun. 1988 30 Jun. 1988 100 p (Contract NASw-3165) (NASA-CR-183249; NAS 1.26:183249) Avail: NTIS HC A05/MF A01 CSCL 05B

The Life Sciences Bibliographic Data Base was created in 1981 and subsequently expanded. A systematic, professional system was developed to collect, organize, and disseminate information about scientific publications resulting from research. The data base consists of bibliographic information and hard copies of all research papers published by Life Sciences-supported investigators. Technical improvements were instituted in the database. To minimize costs, take advantage of advances in personal computer technology, and achieve maximum flexibility and control, the data

N89-28443# Lawrence Livermore National Lab., CA. ENGINEERING DRAWING TRANSFER TEST WITH DOUGLAS AIRCRAFT COMPANY: MIL-D-28000 CLASS II (IGES) 2 May 1989 56 p Prepared for Air Force Logistics Command (Contract W-7405-eng-48) (DE89-012810; UCID-21677) Avail: NTIS HC A04/MF A01

The DOD Computer-aided Acquisition and Logistic Support (CALS) Test Network (CTN) is conducting tests of the military standard for the Automated Interchange of Technical Information, MIL-STD-1840A (1840A) (OSDA88) and its companion suite of military specifications. The CTN is a DOD sponsored confederation of voluntary participants from industry and Government, managed jointly by a technical staff at Air Force Logistics Command (AFLC) and Lawrence Livermore National Laboratory (LLNL). The objective of the CTN tests is to demonstrate and evaluate the interchange and functional use of digital technical information between industry and government using the CALS Standards. This test was CTN Planned Test (CPT) (CTN89) with Douglas Aircraft Company (DAC). It was conducted at a DAC facility in Long Beach, California, February 7 to 9, 1989. The objective of the CPT was to test the engineering drawing subset of Initial Graphics Exchange Specifications (IGES) (NBS88) entities defined in the Military Specifications for the Digital Representation for Communication of Product Data: IGES Application Subsets, MIL-D-28000 Amendment 1 (28000) (OSDD88). Since DAC is preparing to accept data from a subcontractor in conjunction with its DOD C17 contract, the primary goal of this test was to demonstrate, test, and evaluate DAC's ability to inerchange and use digital data in 1840A/28000 form. A secondary goal was to evaluate the CTN's 28000 Class 2 Reference Material utilized the first tim in this test and scheduled for use in subsequent tests of 28000.


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