Saturn's largest moon, Titan, is a totally unique planetary body which is certain to yield exciting new phenomena. Current information is lacking in detail to distinguish between a thin methane rich atmosphere and a thick nitrogen rich atmosphere. Therefore, both the thin and thick atmospheric models were used for the study of various Titan probe classes described in this report. The technical requirements, conceptual design, science return, schedule, cost and mission implications of three...
Topics: NASA Technical Reports Server (NTRS), ATMOSPHERIC ENTRY, PLANETARY LANDING, SATURN (PLANET), SPACE...
The standard solar cells (2x2 cm) from the cast silicon heatexchanger method) showed a maximum AMO efficiency of 10.1%. Cells from low resistivity material (0.5 ohm-cm) showed lower performance than those of the high resistivity cast silicon (3 ohm-cm), an average efficiency 9.5% versus 7.6% Maximum AMO efficiency of the standard solar cells (2x2 cm) from the EFG (RH) ribbons was about 7.5%. The solar cells from controlled SiC, using the displaced die, showed more consistent and better...
Topics: NASA Technical Reports Server (NTRS), ELECTRICAL PROPERTIES, ENERGY CONVERSION EFFICIENCY, RIBBONS,...
The validation of a 20-year service life for low-cost photovoltaic arrays is a critical requirement in the Low-Cost Solar Array (LSA) Project. The validation is accomplished through accelerated life-prediction tests. A two-phase study was conducted to address the needs before such tests are carried out. The results and recommended techniques from the Phase 1 investigation are summarized in the appendix. Phase 2 of the study is covered in this report and consisted of experimental evaluations of...
Topics: NASA Technical Reports Server (NTRS), MEASURING INSTRUMENTS, PHOTOVOLTAIC CELLS, SERVICE LIFE,...
The mechanisms which lead to the destruction of a normally protective scale during the initial stages of hot corrosion of 14 nickel-base alloys contaminated with Na2SO4 and other condensed deposits were investigated. A continuous reading microbalance was used to record weight changes at temperatures between 900 C and 1000 C at 1 atmosphere pressure of slowly flowing oxygen. The reaction was initiated by raising a preheated furnace around the quartz tube in which the specimen was supported with...
Topics: NASA Technical Reports Server (NTRS), ALKALIES, HOT CORROSION, MICROSTRUCTURE, NICKEL ALLOYS,...
Projects currently in progress on ionospheric research are described. General topics discussed include: planetary atmospheres, the ionosphere and its region, and mass spectroscopy.
Topics: NASA Technical Reports Server (NTRS), IONOSPHERICS, PLANETARY IONOSPHERES, RESEARCH AND...
A low cost ohmic contact on silicon solar cells based on molybdenum-tin metal systems was developed. The approach is based on the formulation of a screenable ink composed from molybdenum oxide and tin mixture. The reduction of Mo03 into Mo and the establishment of Mo 03:Sn ratio is studied. Both tasks were done in an experimental station constructed for this purpose. The results show that molybdenum was formed from its oxide at 800 C. and improved in bonding to silicon at 900 C. A 20%...
Topics: NASA Technical Reports Server (NTRS), ELECTRIC CONTACTS, MOLYBDENUM ALLOYS, PRODUCT DEVELOPMENT,...
There are no author-identified significant results in this report.
Topics: NASA Technical Reports Server (NTRS), COLUMBIA RIVER BASIN (ID-OR-WA), FIRES, FORESTS, LAND USE,...
There are no author-identified significant results in this report.
Topics: NASA Technical Reports Server (NTRS), MEASURING INSTRUMENTS, PRECISION, DISPLAY DEVICES, EARTH...
The standard solar cells (2x2 cm) from the cast silicon (HEM) showed a maximum AMO efficiency of 10.1%. Cells from the low resistivity material (0.5 ohm-cm) showed lower performance than those of the high resistivity cast silicon (3 ohm-cm), an average efficiency 9.5% versus 7.6%. Maximum AMO efficiency of the standard solar cells from the EFG (RH) ribbons was about 7.5%. The solar cells from the controlled SiC, using the displaced die, showed more consistent and better performance than those...
Topics: NASA Technical Reports Server (NTRS), ENERGY CONVERSION EFFICIENCY, PRODUCT DEVELOPMENT, SOLAR...
Topics covered include: (1) estimation in discrete multivariate distributions; (2) a procedure to predict cloud cover frequencies in the bivariate case; (3) a program to compute conditional bivariate normal parameters; (4) the transformation of nonnormal multivariate to near-normal; (5) test of fit for the extreme value distribution based upon the generalized minimum chi-square; (6) test of fit for continuous distributions based upon the generalized minimum chi-square; (7) effect of correlated...
Topics: NASA Technical Reports Server (NTRS), CLOUD COVER, MULTIVARIATE STATISTICAL ANALYSIS, STATISTICAL...
Topics: DTIC Archive, NATIONAL SCIENCE BOARD ARLINGTON VA, *SCIENTIFIC RESEARCH, EDUCATION, RESEARCH...
An analytical study of the passage of distorted flow through an isolated, high hub-tip ratio axial compressor is reported. The analysis involves the coupling of the unsteady blade row aerodynamic response (with the flow immediately upstream of the blade row prescribed) with the unsteady duct flow both upstream and downstream of the blade row under the influence of the blade row loading. The numerical solution uses a starting procedure which does not require the inlet plane to be far enough...
Topics: DTIC Archive, Perkins,John N, NORTH CAROLINA STATE UNIV RALEIGH ENGINEERING DESIGN CENTER,...
Three-dimensional flow effects play an important role in the performance of axial-flow fans and compressors that operate at transonic speeds. The coupling between transonic and three-dimensional effects limits the applicability of the two-dimensional analysis methods that have been in use for some years. The present research program was undertaken with the aim of extending these numerical techniques, so as to handle more fully the nonlinearity of the problem. Thus, heavily loaded blades with...
Topics: DTIC Archive, Rae,William J, CALSPAN ADVANCED TECHNOLOGY CENTER BUFFALO NY, *TRANSONIC FLOW,...
The development of semidirect methods for rapidly calculating steady-state viscous flows in channels is described. The methods successfully calculate laminar flows in almost arbitrary two-dimensional channels, and also work successfully for turbulent flows. The methods are not successful in three dimensions. (Author)
Topics: DTIC Archive, Roache,Patrick J, ECODYNAMICS RESEARCH ASSOCIATES INC ALBUQUERQUE NM, *FLOW RATE,...
This report presents the results on (1) isolation of Korean hemorrhagic fever (KHF) virus from patients (2) antibody responses in animals (3) the ratio of clinical and subclinical infection (4) cultivation of the virus in a tissue culture cells and (5) vertical transmission of KHF virus in Apodemus agrarius. Out of 943 tested US military personnel stationed in Korea during years 1977 and 1978, five were sero-positive to KHF virus. It was confirmed that KHF virus grows well in human lung cancer...
Topics: DTIC Archive, Lee,Ho Wang, KOREA UNIV SEOUL DEPT OF MICROBIOLOGY, *HEMORRHAGIC FEVERS, USSR, ARMY...
Contents: Filamentation in Charged Particle Beams; Drift-Cyclotron Instability Particle Simulations; Lower Hybrid Drift Instability Simulations Using ES1 Hybrid Code; Field Reversed Layer Simulations in 1d; Control of Unwanted Beaming Instabilities; ES1 Code; RINGHYBRID Code; RJET Development; and DDEX Utility Routine.
Topics: DTIC Archive, Birdsall,C K, CALIFORNIA UNIV BERKELEY ELECTRONICS RESEARCH LAB, *COMPUTERIZED...
This report describes work performed on the Packet Speech Systems Technology Program sponsored by the Information Processing Techniques Office of the Defense Advanced Research Projects Agency during the period 1 October 1978 through 31 March 1979.
Topics: DTIC Archive, Bially, Theodore, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB, *COMMUNICATIONS...
The purpose of this manual is to provide a detailed description of the programs of the automated data system for the Statistical Retrieval System and Rate Generator (srs/rg). This manual is primarily for programmers (and secondarily users) to use in future maintenance of the system. There is a separate manual for management/users of the system. (Author)
Topics: DTIC Archive, D'Amalio,Joseph M, GEORGE WASHINGTON UNIV WASHINGTON D C INST FOR MANAGEMENT SCIENCE...
This report applies the tools of modern multivariable control systems analysis to an aircraft representative of a Type B V/STOL aircraft. Specifically, the AV-8A Harrier is analyzed in the low-speed, transition and hover flight regimes. New techniques for digital command augmentation system design, especially suited to precise control of a V/STOL aircraft, are developed and applied at representative flight conditions. The stability results indicate that a prime determinant of longitudinal...
Topics: DTIC Archive, Broussard,John R, ANALYTIC SCIENCES CORP READING MA, *FLIGHT CONTROL SYSTEMS,...
This technical report summarizes the image understanding, image processing, and smart sensor research activities performed by the USC Image Processing Institute. The research program has, as its primary purpose, the development of techniques and systems for understanding images. Methodologies range from low level image processing principles, smart sensor CCD LSI circuit design, up to higher level symbolic representations and relational structure manipulations.
Topics: DTIC Archive, Andrews, Harry C, UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES IMAGE PROCESSING...
The multikilowatt laser as an industrial tool in the production line has now been accepted for three years. Recently, the laboratory feasibility of heavy-penetration laser welding was demonstrated in low strength steel. This program describes the establishment of laser welding process parameters that will produce a sound, cost-effective joint with ballistic potential of 1 1/2 in. armor plate. Sufficient production, test, and operational data will be prepared to permit a detailed analysis of the...
Topics: DTIC Archive, Seaman,F D, IIT RESEARCH INST CHICAGO IL, *ARMOR PLATE, *LASER WELDING, ARMOR,...
Contents: An Articulatory Synthesizer for Perceptual Research; Perception of an Oral-Nasal Continuum Generated by Articulatory Synthesis; Coarticulation and Theories of Extrinsic Timing; Orthography and the Beginning Reader; Aspiration Amplitude as a Voicing Cue for Syllable-Initial Stop Consonants Presented Monaurally and in Dichotic Competition; Stop Consonant Place Perception with Single-Format Stimuli: Evidence for the Role of the Front-Cavity Resonance; Vowel Duration Change and its...
Topics: DTIC Archive, Abramson,Arthur S, HASKINS LABS INC NEW HAVEN CONN, *SPEECH, SYNTHESIS, CODING,...
Contents: A Comparison of the Turbulent Characteristics of Cumulus Clouds Measured Near Yellowknife and Thunder Bay; Indirect Measurement of Turbulent Skin Friction; Current Projects of the Division of Mechanical Engineering and the National Aeronautical Establishment.
Topics: DTIC Archive, NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF MECHANICAL ENGINEERING,...
Square root, least squares estimation algorithms are examined from the viewpoint that square root arrays are arrays expressing relevant problem random variables in terms of basis sets of orthonormal (identity covariance) random variables. With this viewpoint, projection-theorem arguments can be expressed directly in the square root arrays, giving simple, geometric derivations of square root algorithms. A unifying framework is provided for previously proposed square root algorithms (and...
Topics: DTIC Archive, Kailath,Thomas, STANFORD UNIV CALIF INFORMATION SYSTEMS LAB, *LEAST SQUARES METHOD,...
Progress on the Distributed Sensor Networks program is reported. Further design and analysis of strawman sensor and report circuit communications for a low-flying aircraft DSN are presented. System studies dealing with sensor redundancy, adaptive communications nonuniform node distribution, and alternative DSN applications are summarized. Overall designs for DSN node software, for a software development DSN simulation test bed, and acoustic node front-end simulation software are reviewed....
Topics: DTIC Archive, Lacoss, Richard T, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB, *AERIAL...
The purpose of this paper is to provide a programmer's manual for a system which computes average monthly non-EAS attrition rates by command location (MCC CODE), military occupational speciality (MOS) and grade level (SKILL); and/or by MCC CODE, military occupational specialty group (OCC FIELD) and SKILL. This system uses the SRS/RG history file as input. (Author)
Topics: DTIC Archive, D'Amalio,joseph M, GEORGE WASHINGTON UNIV WASHINGTON D C PROGRAM IN LOGISTICS, *DATA...
The purpose of this manual is to describe from the user's perspective the automated data system that has been designed and programmed for the Statistical Retrieval System and Rate Generator (SRS/RG). The heart of the SRS/RG is a history file composed of variable length records; one record containing background information for each Marine. The records will grow as significant career events are added to the records. The significant events include reenlistments, promotions and demotions, changes...
Topics: DTIC Archive, Teeples,T C, GEORGE WASHINGTON UNIV WASHINGTON D C PROGRAM IN LOGISTICS, *PERSONNEL...
Although several theories of Schottky-barrier formation have been proposed, none has emerged as the correct general theory which elucidates the mechanism responsible for the barrier formation. Indeed, there may be no such general theory and, at the present time, it seems more appropriate to study limited classes of semiconductor materials. We have chosen the 3-5 compounds for both theoretical and practical reasons. The cleavage faces of GaAS, GaSb, and InP have the advantage that there are no...
Topics: DTIC Archive, Spicer, W E, STANFORD UNIV CA STANFORD ELECTRONICS LABS, *ALUMINUM COMPOUNDS,...
The project reported, supported by the Defense Civil Preparedness Agency (DCPA), is concerned with the development of a civil preparedness educational program for integration into elementary and secondary school curricula. The objectives of the project are to design and develop and educational program which will significantly broaden and enhance emergency preparedness education for young people. The program is designed to include: (1) nature of and protective measures in natural and man-made...
Topics: DTIC Archive, Ripley,Richard M, NORTH CAROLINA DEPT OF CRIME CONTROL AND PUBLIC SAFETY RALEIGH DIV...
This report describes the research activities in the Information Systems Laboratory at Stanford University on Distributed Sensor Networks (DSN). The objectives are to develop new and innovative signal processing and computer network techniques with applications to systems employing multiple sensors for target surveillance and tracking. Such systems would be composed of sensors, processors, and data bases distributed throughout an area, interconnected by a suitable communication system. The...
Topics: DTIC Archive, Morf, M, STANFORD UNIV CA STANFORD ELECTRONICS LABS, *ALGORITHMS, CENTRALIZED,...
This report describes some new and practical methods for using seismic body waves set up by an earthquake to learn about the motions which must have occurred at the seismic source. The method entails working with recordings of the observed pulse shape of ground motion, and matching this with synthetics that are appropriate for a fracture theory of earthquake faulting. We describe the theory, the details of the data analysis, and applications to several different earthquakes.
Topics: DTIC Archive, Richards, Paul G, LAMONT-DOHERTY GEOLOGICAL OBSERVATORY PALISADES NY, *EARTHQUAKES,...
The goal of this research on voice conferencing technology has been to recommend and demonstrate the best secure voice conferencing techniques for future defense communication needs. The focus was on the human factors aspects of conferencing. Analysis also was made of the conferencing process itself and of the various proposed system configurations. The following are among the study's conclusions: (1) Requirement to accommodate narrowband users in military conferences necessitates use of some...
Topics: DTIC Archive, Forgie,James W, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB, *VOICE...
Contents: Relaxation and Energy Transfer In Alkali Metals; Relaxation and Energy Transfer in Small Polyatomic Molecules; Generation and Control of Radiation; Quantum Detection and Sensing of Radiation; Physical Properties and Effects of Electronic Materials.
Topics: DTIC Archive, Flynn,George W, COLUMBIA RADIATION LAB NEW YORK, *ELECTROOPTICS, *LASERS, *RESEARCH...
Topics: DTIC Archive, Marquis,Robert E, ROCHESTER UNIV N Y DEPT OF MICROBIOLOGY, *BACTERIA, *GASES,...
These studies are a continuation of those previously reported to ONR. The studies were the result of a serendipitous observation that rat or human granulocyte donors who had undergone filtration leukopheresis demonstrated a granulocytosis in spite of the removal of up to 1 x 10 to the 9th power granulocytes. Subsequent studies suggested the clinical usefulness of the use of plasma obtained from a granulocyte donor (PPP) to improve granulocyte yields following subsequent donations.Additional...
Topics: DTIC Archive, Roy,Albert J, LITTLE (ARTHUR D) INC CAMBRIDGE MASS DEPT OF EXPERIMENTAL HEMATOLOGY,...
The relative performance of satellite communication links using conventional binary CPSK, DPSK, and noncoherent FSK demodulation techniques is evaluated for a range of simulated highly ionized and striation regions which may result following high attitude nuclear detonations. Performance is characterized by bit error rate estimates obtained through extensive computer simulation of satellite downlinks using various modem designs over a range of data rates and fade rates. Phase fluctuations are...
Topics: DTIC Archive, Ibaraki,Ronald, ESL INC SUNNYVALE CA, *RADIO LINKS, *SPACECRAFT COMPONENTS,...
Measurements of the atmospheric aerosol optical thickness were made during the 1977 EOMET cruise across the Atlantic Ocean and the Mediterranean Sea. These data were obtained at the same time as NOAA-5 and GOES visible radiance measurements in the vicinity of the ship. Linear relationships between the upwelling radiance and the aerosol optical thickness were found for each satellite, confirming earlier Landsat results. Differences in the relationships for each satellite are attributed to...
Topics: DTIC Archive, Griggs,M, SCIENCE APPLICATIONS INC LA JOLLA CALIF, *AEROSOLS, *REPORTS,...
The purpose of this first phase of a study on the morphology of planetary waves was to estimate global temperatures for the upper stratosphere and lower mesophere from the radiances of the SCR-B experiment on Nimbus 5. This has been successfully achieved using a regression of the radiances on meteorological rocket data. In general, the accuracy of the retrieved temperatures, i.e., standard deviation of the error, varies from about 3 K at 10 mb to about 5.5 K at 0.4 mb as compared to...
Topics: DTIC Archive, Hovland,D N, CONTROL DATA CORP MINNEAPOLIS MINN RESEARCH DIV, *ATMOSPHERIC...
In this experimental investigation the polarization levels and relaxation rates for optically pumped 4He and 3He isotopes were determined. An experiment verified that simultaneous magnetic resonance of both isotopes in a common volume may be attained. Characteristics of some experimental semiconductor diode lasers were measured with a view toward replacing helium lamps as an optical pumping radiation source with diode lasers. A semiconductor diode laser was successfully used to monitor...
Topics: DTIC Archive, McGregor,Douglas D, TEXAS INSTRUMENTS INC DALLAS, *NUCLEAR MAGNETIC RESONANCE,...
This report documents the development and subsequent field testing of two rapid response instruments for the detection of methane gas in the vapor resulting from an LNG spill. The instruments were: a laser instrument with a 0.005 second response time and 0.1% sensitivity, and a two-band differential radiometer (TBDR) with a 0.15 second response time and 1% sensitivity. A thermistor sensor was also developed for the rapid (0.2 second) measurement of vapor temperature. The implementation of this...
Topics: DTIC Archive, Hinckley,E D, JET PROPULSION LAB PASADENA CA, *INFRARED DETECTION, *MONITORS,...
A model is developed that describes the impact of severe propagation losses on the natural noise environment at high frequencies. (Author)
Topics: DTIC Archive, Price ,Gary H, SRI INTERNATIONAL MENLO PARK CA, *RADIO TRANSMISSION,...
Lincoln Laboratory has embarked on the task of carrying out the design and specification of a U.S. Data Center which will fulfill U.S. obligations that may be incurred under a possible future Comprehensive Test Ban Treaty. This report includes 17 contributions, relating progress in the Data Center design and associated seismic research. These contributions are grouped as follows: seismic data management system (5 studies), locations and travel times (5 studies), and general seismology (7...
Topics: DTIC Archive, Chinnery, Michael A, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB,...
This is a monthly publication presenting brief articles concerning recent developments in European Scientific Research. It is hoped that these articles (which do not constitute part of the scientific literature) may prove of value to American scientists by disclosing interesting information well in advance of the usual scientific publications. The articles are written primarily by members of the staff of ONRL and occasionally articles are prepared by, or in cooperation with, members of the...
Topics: DTIC Archive, Pryce,Aubrey W, OFFICE OF NAVAL RESEARCH LONDON (ENGLAND), *NAVAL RESEARCH, *RESEARCH...
This report is a user's manual for the two computer codes CHLG and CHTS for rapidly calculating steady incompressible viscous flow in two-dimensional channels. Code CHLG calculates laminar flow only in a channel with a general shape for the lower boundary. Code CHTS includes both laminar and turbulent flow options, the latter by a simple eddy viscosity model, but is limited to straight wall channels. Both codes provide for either Couette or Poiseuille inflow, and use a symmetry condition at the...
Topics: DTIC Archive, Roache,Patrick J, ECODYNAMICS RESEARCH ASSOCIATES INC ALBUQUERQUE NM, *COMPUTER...
This report covers work carried out with support of the Department of the Air Force during the period 1 October 1978 through 31 March 1979. The current objectives of the electrooptical device program are: (1) to perform life tests on GaInAsP/InP double-heterostructure (DH) diode lasers operating in the 1.0- to 1.3-micrometer wavelength region and analyze the degradation mechanisms, and (2) to fabricate and study avalanche photodiodes of similar composition GaInAsP operating in the same...
Topics: DTIC Archive, Hurwitz,Charles E, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB,...
Plasma epinephrine, norepinephrine and dopamine-beta-hydroxylase were used to quantitate the degree of sympathetic activation undergone by miniature swine and by men. Swine exposed to high Gz forces have massive output of norepinephrine which falls off rapidly during return to 1 G. Repeated exposures are characterized by a further increase of norepinephrine demonstrating large reserve stores and increased norepinephrine to prolonged stress. These animals also had a massive adrenomedullary...
Topics: DTIC Archive, Ziegler, Michael G, TEXAS UNIV MEDICAL BRANCH AT GALVESTON, *ACCELERATION TOLERANCE,...
This paper examines the problem of computing rates of occurrence of certain kinds of personnel events in the U.S. Marine Corps. It details the results of a study which included interviews of various groups of manpower planners, a survey of currently used data bases, and an investigation of existing procedures for computing these rates. It conclues that a new data base is needed and describes both the data base and methods of creating and updating it. (Author)
Topics: DTIC Archive, Tomlinson,Ross E, GEORGE WASHINGTON UNIV WASHINGTON D C PROGRAM IN LOGISTICS, *DATA...
The major effort undertaken was a thorough spectroscopic study of the products of reactions of yttrium and scandium atoms with halogen molecules. These studies have shown that chemiluminescence for these reaction systems does not originate from electronically excited monohalide molecules as suggested by previous investigators, but instead arises from electronically excited metal dihalide molecules, MX2*. Excitation spectra from the monohalides of yttrium and scandium were recorded with the...
Topics: DTIC Archive, Cool,Terrill A, CORNELL UNIV ITHACA NY SCHOOL OF APPLIED AND ENGINEERING PHYSICS,...
A test program was conducted to simulate blast wave intercepts with a scaled aircraft engine in subsonic flight. Initial results were reported in DNA 4590F. This report presents additional test data and evaluated results. Jumps in total pressure at the engine face produced by blast interaction with the blastward and leeward inlets are evaluated with respect to effects of four test variables: inlet weight flow, Mach number, shock overpressure and intercept angle. The total pressure rose more...
Topics: DTIC Archive, Ruetenik,J Ray, KAMAN AVIDYNE BURLINGTON MA, *TURBOFAN ENGINES, *BLAST WAVES,...
