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Defense Technical Information Archive
Nov 13, 2019 Defense Technical Information Center
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An experimental and analytical program to determine the effects of shock waves in porous iron is being undertaken. The overall goal is to cause sufficient vaporization such that dense clouds of Fe atoms can be generated. A large, high altitude test chamber and associated equipment have been instrumented for these tests. Initial results look promising.
Topics: DTIC Archive, Fluegge, Robert A, CALSPAN CORP BUFFALO NY, *ATMOSPHERIC SOUNDING, *IRON, ATOMS,...
Defense Technical Information Archive
Nov 13, 2019 Defense Technical Information Center
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Results are presented from the first phase of a three-phase program sponsored by Advanced Research Projects Agency to develop a laser mirror material system. Copper, dispersion hardened with the addition of 0-5 vol% SiC or Al2O3 was deposited by high-rate sputtering to produce a stable, fine-grain (0.4 micrometer) polishable material exhibiting a surface roughness of less than 15 A rms when it was mechanically polished. Instruments for measuring surface roughness by scattered light and mirror...
Topics: DTIC Archive, Stewart, R W, PACIFIC NORTHWEST LABS RICHLAND WA, *GAS LASERS, *INFRARED LASERS,...
Defense Technical Information Archive
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Two (Gd(.5)Y(2.5))(Fe(4)Ga(1))O(12) garnet films deposited on GGG substrates have been tested for possible use as modulators, switches and isolators. Their passive optical waveguiding properties have been characterized at a wavelength of 1.15 micrometer. Modulation of the output, passed through an analyzer, was observed by applying a longitudinal magnetic field. The mode conversion efficiency was shown to be limited primarily by the phase velocity mismatch between TE and TM modes. The...
Topics: DTIC Archive, Tseng, Samuel C, IBM THOMAS J WATSON RESEARCH CENTER YORKTOWN HEIGHTS NY, *FERRATES,...
Defense Technical Information Archive
Nov 13, 2019 Defense Technical Information Center
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A mathematical model has been developed to describe the mechanism of normal perforation of projectiles in metallic targets. The perforation process is considered to be divided into three interconnected stages. The analysis accounts for an effective mass of the bullet due to part of the target material moving with the bullet, the deformation of the bullet during penetration, and the increased strength of the target material at high rates of loading. The analysis enables the residual velocity to...
Topics: DTIC Archive, Awerbuch, J, TECHNION - ISRAEL INST OF TECH HAIFA MATERIAL MECHANICS LAB,...
Defense Technical Information Archive
Nov 13, 2019 Defense Technical Information Center
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Two classes of mathematical programs with optimization problems in the constraints have recently been studied by two of the authors. The first class involves mathematical programs in the constraints, and the second class involves max-min problems in the constraints. A computational technique has been developed and shown to be effective in solving problems of the first class. The authors show that the computational technique can be applied to problems of the apparently wider second class.
Topics: DTIC Archive, Bracken, Jerome, INSTITUTE FOR DEFENSE ANALYSES ALEXANDRIA VA PROGRAM ANALYSIS DIV,...
Defense Technical Information Archive
Nov 13, 2019 Defense Technical Information Center
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Analysis of urine electrolytes obtained during saturation excursion dives of four divers to depths equivalent to 800 and 1000 feet of sea water showed in all cases during decompression an increase in urinary CO2 excretion and calcium excretion. In two subjects who developed symptoms of decompression sickness, manifested in poorly localized muscle aches and stiffness of joints which did not respond to recompression and oxygen treatment, the carbon dioxide excretion in the urine was more...
Topics: DTIC Archive, Schaefer, Karl E, NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT, *CALCIUM, *CARBON...
Defense Technical Information Archive
Nov 13, 2019 Defense Technical Information Center
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The ARPA computer network provides a communication medium which allows dissimilar computers (Hosts) to interchange information. Each Host is connected to an Interface Message Processor (IMP), and IMPs are interconnected by leased common carrier circuits. There is frequently no direct circuit between two communicating Hosts, and the intermdeiate IMPs store and forward the information. IMPs regularly exhange information which is used to adapt routing to changing network conditions. IMPs also...
Topics: DTIC Archive, Heart, Frank E, BOLT BERANEK AND NEWMAN INC CAMBRIDGE MA, *DATA PROCESSING, *DIGITAL...
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ORS, OPTICAL IMAGES, STORAGE TUBESA preferential integration technique is described which permits the selective amplification of low light level signals with a simultaneous suppression of bright signals, optical backgrounds and tube dark currents. This unique technique extends the in frame dynamic range of imaging tubes by over one magnitude with a significant improvement in the threshold sensitivity. Preferential integration permits handling signals as weak as a 0.05 signal to peak-to-peak...
Topics: DTIC Archive, Rotstein, Jacob, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB, *IMAGE TUBES,...
Defense Technical Information Archive
Nov 13, 2019 Defense Technical Information Center
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AND DISPLAY SYSTEM). A General Syntax Program has been implemented to support work on a variety of parsing strategies. A doctoral thesis on locally organized parsing for spoken input has been completed. The speech data base hardware and software have been actively used in supporting workshop meetings among the ARPA Speech contractors. Encouraging results are being achieved with an automatic phonetic labeling program. Network retrieval of data from the data base has been demonstrated. The TX-2...
Topics: DTIC Archive, Forgie, James W, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB, *DATA PROCESSING,...
Defense Technical Information Archive
Nov 13, 2019 Defense Technical Information Center
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ARINE ANTENNAS, *DIPOLE ANTENNAS), ULTRAHIGH FREQUENCY, NUMERICAL ANALYSIS, RADIOFREQUENCY POWER, SPACE TO SURFACE, MATHEMATICAL MODELSThe receive properties for a dipole in the presence of sea water were obtained by solving integral equations for currents along the unloaded dipole and its image. For dipoles of 0.1 wavelength or higher above the sea surface, the performance resembled that of a dipole over a perfectly conducting plane; for dipoles within 0.1 wavelength above the sea surface, the...
Topics: DTIC Archive, Kao, Peter S, MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB, *DIPOLE ANTENNAS,...
Defense Technical Information Archive
Nov 13, 2019 Defense Technical Information Center
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The extended Huygens-Fresnel principle is used to derive an explicit expression for the image plane illuminance distribution of an extended object with an arbitrary liminance emittance distribution. The combined simultaneous effects of attenuation, background luminance, and atmospheric turbulence are given. A quantitative comparison of these effects is made, and their contribution to the overall loss in resolution is given. In particular, the authors derive a quantitative expression for the...
Topics: DTIC Archive, Yura, Hal T, AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS, *LIGHT TRANSMISSION,...
Defense Technical Information Archive
Nov 13, 2019 Defense Technical Information Center
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Stimulated emission predictions and measurements for an H2 + F2 laser are compared for H2 pressures from threshold to stoichiometric, a range of several orders of magnitude. Slowly flowing, helium-diluted, 50-Torr mixtures are initiated photolytically. Two dilution ratios and two output couplers are considered, and good agreement is found for time to threshold and pulse duration vs H2 pressure. Spiking, relaxation oscillations, and possibly mode beating freatures not modeled, are observable in...
Topics: DTIC Archive, Suchard, Steven N, AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS, *GAS LASERS, CHEMICAL...
B-32-A(*titanium alloys, *stress corrosion), corrosion inhibition, coatings, boron compounds, carbides, salts, environmental testsboron carbides, protective coatings, titanium alloy 5al 2.5snAn adjustable deflection, multi- specimen, bent beam test fixture was devised for conditioning sheet specimens used in the investigation of hot salt stress corrosion effects in titanium alloys. Initial tests were conducted with a Ti-5Al-2.5Sn titanium alloy at a temperature of 900F and a stress just below...
Topics: DTIC Archive, Wong, Anthony K, ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA, *STRESS...
Defense Technical Information Archive
Nov 12, 2019 Defense Technical Information Center
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The recovery of the atmosphere, following its disturbance by any of several natural or manmade events of the magnitude of a solar-flare impingement or a nuclear burst, may be characterized in terms of certain extremely important chemical and physical processes. It is the purpose of this Handbook to provide the best available detailed information concerning both chemical and physical mechanisms of the sort indicated above. The following topics are discussed: Atmospheric structure; Fluid...
Topics: DTIC Archive, Bortner, Marlyn H, GENERAL ELECTRIC CO PHILADELPHIA PA SPACE DIV, *REACTION KINETICS,...
Defense Technical Information Archive
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Criteria of uniformity of the linearized theory of free-surface gravity flow past submerged or floating bodies based on the thin body perturbation expansion, combining the slenderness parameter, and F, the Froude number, are derived for both two- and three-dimensional flows. These criteria depend on the shape of the leading and trailing edges; as the shape becomes finer the linearized solution becomes valid for smaller F. Uniform first order approximations are derived by two alternative...
Topics: DTIC Archive, Dagan, Gedeon, HYDRONAUTICS INC LAUREL MD, *HYDRODYNAMIC CONFIGURATIONS, LINEAR...
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Nov 12, 2019 Defense Technical Information Center
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The paper consists of six sections. The first is devoted to chain binomial methods and their use in the statistical analysis of measles and hepatitis data. A second considers time dependent results for carrier-borne epidemics, and the use of matrix methods in computing probabilities of their final size. The third surveys the application of perturbation techniques to the general stochastic epidemic, and the estimation of infection and removal parameters in this model on the basis of smallpox...
Topics: DTIC Archive, Gani, J, STANFORD UNIV CA DEPT OF STATISTICS, *EPIDEMIOLOGY, STOCHASTIC PROCESSES,...
Defense Technical Information Archive
Nov 12, 2019 Defense Technical Information Center
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A system for computer vision is presented, which is based on two- dimensional prototypes, and which uses a hierarchy of features for mapping purposes. More specifically, one is dealing with scenes composed of planar faced, convex objects. Extensions to the general planar faced case are discussed. The visual input is provided by a TV-camera, and the problem is to interpret that input by computer, as a projection of a three-dimensional scene. The system proposed and demonstrated in this paper...
Topics: DTIC Archive, Grape, Gunnar R, STANFORD UNIV CA DEPT OF COMPUTER SCIENCE, *DATA PROCESSING, FLOW...
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A simulation model for the open ocean submarine versus submarine search and detection problem is presented. The objective of the simulation is to estimate the probability with which a nuclear powered attack submarine will achieve sonar detection of a nuclear powered transiting submarine using a search plan based on external intelligence. A detailed description of the model and its use are included along with a typical analysis.
Topics: DTIC Archive, Haskell, Richard D, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *ANTISUBMARINE WARFARE,...
Defense Technical Information Archive
Nov 12, 2019 Defense Technical Information Center
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Topics: DTIC Archive, Vaselich, R, NAVAL WEAPONS LAB DAHLGREN VA, *LIGHTNING, *BIBLIOGRAPHIES, ELECTRICAL...
Defense Technical Information Archive
Nov 12, 2019 Defense Technical Information Center
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A comprehensive study was conducted to review the state-of-the art of new prime movers and to determine if they could be applied to present or future ground support equipment (GSE). This investigation included a discussion of existing GSE prime mover requirements and the problems that they encounter.
Topics: DTIC Archive, Womer, William H, NAVAL AIR ENGINEERING CENTER LAKEHURST NJ GROUND SUPPORT EQUIPMENT...
Defense Technical Information Archive
Nov 12, 2019 Defense Technical Information Center
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The collapse of a homogeneous fluid mass immersed in a stably stratified fluid is studied numerically. A finite difference formulation of the Navier-Stokes equations in the primitive variables is solved in a large box several times the size of the mixed region. The formulation conserves total energy in the box in the special case where the viscosity is zero. The shape of the homogeneous region and its energy content are followed in detail. Confirming a previous speculation made from a crude...
Topics: DTIC Archive, Dugan, J P, NAVAL RESEARCH LAB WASHINGTON DC, *FLUID FLOW, DIFFUSION, MATHEMATICAL...
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Signature table training method consists of cumulative evaluation of a function (such as a probability density) at pre-assigned co-ordinate values of input parameters to the table. The training is conditional; based on a binary valued learning input to a table which is compared to the label attached to each training sample. Interpretation of an unknown sample vector is then equivalent of a table look-up, i.e. extraction of the function value stored at the proper co-ordinates. Such a technique...
Topics: DTIC Archive, Thosar, R B, STANFORD UNIV CA DEPT OF COMPUTER SCIENCE, *LEARNING MACHINES, *PATTERN...
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Nov 12, 2019 Defense Technical Information Center
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A model of the hard rock tunneling process is developed including a three-dimensional stratified geology, a modular representation of many excavation system possibilities, and a cost-accounting system to facilitate cost-benefit analysis of tunneling system performance. This supplement to Volume 2 provides documentation and program guides for a cyclic drill and blast control program and a stochastic boring machine failure model. (Author)
Topics: DTIC Archive, McJunkin, M M, GENERAL RESEARCH CORP ARLINGTON VA, *ROCK, *UNDERGROUND STRUCTURES,...
Defense Technical Information Archive
Nov 12, 2019 Defense Technical Information Center
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The report contains supporting information and further programming guides to the excavation simulation described in Volume I. (Author)
Topics: DTIC Archive, Hibbard, R R, GENERAL RESEARCH CORP ARLINGTON VA, *ROCK, *UNDERGROUND STRUCTURES,...
Defense Technical Information Archive
Nov 12, 2019 Defense Technical Information Center
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A model of the hard-rock tunneling process is developed including a three-dimensional stratified geology, a modular representation of many excavation system possibilities, and a cost-accounting system to facilitate cost-benefit analysis of tunneling system performance. The mathematical representations of rock fragmentation, materials handling, ground support, and environmental control are given, supported by empirical data and an analysis of the physics involved.
Topics: DTIC Archive, Hibbard, R R, GENERAL RESEARCH CORP ARLINGTON VA, *ROCK, *UNDERGROUND STRUCTURES,...
Defense Technical Information Archive
Nov 12, 2019 Defense Technical Information Center
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Often the relationship between the pilot and his aircraft is such that the aircraft may be thought of as an extension of the pilot himself during the act of flight. If this pilot accumulates stress in his life with which he can no longer adequately cope, he may engage in self-destructive acts, some of these within the context of his flying activities. The competent pilot practices and acquires skills which help him to deal with the stress of demanding flight situations. However, if this...
Topics: DTIC Archive, Yanowitch, Robert E, FEDERAL AVIATION ADMINISTRATION WASHINGTON DC OFFICE OF AVIATION...
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Nov 12, 2019 Defense Technical Information Center
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Previous work on transverse impact of single textile fibers is reviewed and extended to model orthogonal weaves in which fiber crossovers are simplified as pin joints. A DYNAMIC FINITE-ELEMENT COMPUTER TECHNIQUE PREVIOUSLY DEVELOPED FOR SINGLE FIBERS IS EXTENDED TO MODEL THE WOVEN PANEL. Impact of a woven textile panel exhibits substantial differences compared to the equivalent impact of a single fiber: the propagating strain waves experience pervasive and complex interactions because of the...
Topics: DTIC Archive, Roylance, David, ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA, *BODY...
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Nov 12, 2019 Defense Technical Information Center
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The behavior of scattering cross sections near an excitation threshold is examined for the case of long range potentials. The theory is confirmed by computations of e-Li scattering. Recent observations of threshold structure in e-Na collisions are ascribed to a singlet D resonance of Na(-). A true cusp can occur only in the singlet P partial cross section.
Topics: DTIC Archive, Bardsley, James N, PITTSBURGH UNIV PA DEPT OF PHYSICS, *ELECTRONS, DIFFERENTIAL CROSS...
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Nov 12, 2019 Defense Technical Information Center
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Measurements of the physical and mechanical properties of a large number of glassy carbon samples produced from controlled pyrolysis of furfural alcohol resins demonstrated that the structure can be tailored very substantially. The ability to control properties such as density and fine structure leads to interesting and potentially useful mechanical, physical, and chemical properties. Section thickness in excess of 2 inches have been achieved in very fine pored (100A) glassy carbons in...
Topics: DTIC Archive, Hucke, Edward E, MICHIGAN UNIV ANN ARBOR DEPT OF MATERIALS AND METALLURGICAL...
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Nov 12, 2019 Defense Technical Information Center
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Underwater blast injuries, at increasing ranges beyond the lethal zone from small charges, were studied using animals. The study was conducted in an artificial pond that measured 220 by 150 ft at its surface. The pond was 30 ft deep over its 30- by 100-ft center portion. Sheep, dogs, and a few monkeys were exposed to the blast oriented vertically in the water (long axis perpendicular to the surface). Most were exposed to the blast at 1-ft depths, heads above the surface, and a limited number at...
Topics: DTIC Archive, Richmond, Donald R, LOVELACE FOUNDATION FOR MEDICAL EDUCATION AND RESEARCH...
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Nov 12, 2019 Defense Technical Information Center
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The report discusses the tight-binding approach to calculating the density of states in amorphous covalently bonded semiconductors.
Topics: DTIC Archive, Silver, M, NORTH CAROLINA UNIV AT CHAPEL HILL, *BAND THEORY OF SOLIDS,...
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Nov 12, 2019 Defense Technical Information Center
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ton d cEngineering Design Handbook. Infrared Military Systems. Part One.1AMCP-706-127Supersedes AD-885 227.(*infrared equipment, handbooks), infrared detectors, guided missiles, infrared tracking, lasers, infrared spectroscopy, infrared filters, infrared photography, data processing, countermeasures, reliability, design, military requirementscomputer aided analysis, ray tracing, signal processingThe publication is one of a group of handbooks prepared under the auspices of the Engineering...
Topics: DTIC Archive, ARMY MATERIEL COMMAND ALEXANDRIA VA, *INFRARED EQUIPMENT, COUNTERMEASURES, DATA...
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Nov 12, 2019 Defense Technical Information Center
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The report describes calculations of ionization rates and electric currents in air and ground resulting from neutron sources. In particular, the report describes the numerical methods, nuclear data, and computer programs employed and presents results for a typical thermonuclear neutron spectrum. A discussion of fitting of earlier electromagnetic pulse (EMP) source calculations is also presented. The latest ENDF/B neutron transport and gamma ray production data for air and ground are used and...
Topics: DTIC Archive, Sargis, David A, SCIENCE APPLICATIONS INC LA JOLLA CA, *NUCLEAR EXPLOSIONS, AIRBURST,...
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Nov 12, 2019 Defense Technical Information Center
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The 'parting layer' and the 'hot wall' techniques of epitaxic film growth have been extensively and successfully tested and are now in operation. The research on the PbO(x)S(1-x) has been extended to phtotconductivity measurements. Use of modulation spectroscopy techniques for the study of the optical properties of the films was initiated and extensive thermoreflectance measurements were carried out on the IV-VI compounds and the resulting structures were identified with the critical points in...
Topics: DTIC Archive, Zemel, Jay N, PENNSYLVANIA UNIV PHILADELPHIA LAB FOR RESEARCH ON THE STRUCTURE OF...
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Nov 12, 2019 Defense Technical Information Center
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The report explores perceptions and attitudes concerning military service, and the way they are linked to views about enlistment. Data are based on a sixteen-page self-completed questionnaire administered to a national sample of civilians and a cross-section of Navy personnel. Trends related to age and education are examined for five analysis groups: civilian men, civilian women, Navy enlisted men in their first tour of duty, enlisted men in their second or later tour, and officers. The...
Topics: DTIC Archive, Bachman, Jerald G, MICHIGAN UNIV ANN ARBOR INST FOR SOCIAL RESEARCH, *MILITARY...
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Nov 12, 2019 Defense Technical Information Center
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The analysis of the information in contingency tables is an aspect of multivariate (multiple variates) analysis with particular application to qualitative or categorical as well as quantitative variables. The analysis is concerned with counts in multiway cross-classifications or multiple contingency tables. Multiway contingency tables, or cross-classifications of vectors of discrete random variables, provide a useful approach to the analysis of multivariate discrete data. The method of analysis...
Topics: DTIC Archive, Kullback, S, GEORGE WASHINGTON UNIV WASHINGTON DC GRADUATE SCHOOL OF ARTS AND...
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Nov 12, 2019 Defense Technical Information Center
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The minimum discrimination information theorem yields minimum discrimination information estimates as members of an exponential family which can be expressed in log-linear additive form. The author illustrates in terms of a particular contingency table, the relations implied by hypotheses and subhypotheses of interest on the values of the natural parameters and random variables of the exponential family, the related moment parameters, and the estimates of cell entries. Computations are carried...
Topics: DTIC Archive, Kullback, S, GEORGE WASHINGTON UNIV WASHINGTON DC DEPT OF STATISTICS, *STATISTICAL...
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Nov 12, 2019 Defense Technical Information Center
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The report describes the technical features of systems used in the CHURCH GABBRO exercise during November - December 1972, critiques their performance and recommends future design and operational modifications. Systems discussed include acoustic measurement (ACODAC, MABS, TABS, VLAM and Sonobuoys), environmental instruments (XBTs, AXBTs, STD, current measurement systems, laser wave profiler) and the ships and aircraft involved. Forty-six recommendations are set forth for design improvements or...
Topics: DTIC Archive, Daubin, Scott C, ROSENSTIEL SCHOOL OF MARINE AND ATMOSPHERIC SCIENCE MIAMI FL,...
The study examines data on episodes of decompression sickness, particularly from recent Navy work in which the event occurred under multiple stress conditions, to determine the extent to which decompression sickness might be predicted on the basis of personal characteristics such as age, weight, and physical condition. Such information should ultimately be useful for establishing medical selection criteria to screen individuals prior to participation inactivities involving extensive changes in...
Topics: DTIC Archive, West, Vita R, BIOTECHNOLOGY INC FALLS CHURCH VA, *DECOMPRESSION SICKNESS, *PHYSICAL...
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Nov 12, 2019 Defense Technical Information Center
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A 14-month program is described which culminated in fabrication and limited flight tests of a cockpit meter instrumentation system displaying aircraft specific energy and energy rate (specific excess power). Detailed account is given of the analysis and design processes, including man-in-the-loop hybrid simulation and display, through which the meter and its uses were developed. Preliminary flight test results are also cited.
Topics: DTIC Archive, Sederstrom, D C, HONEYWELL SYSTEMS AND RESEARCH CENTER MINNEAPOLIS MN, *ENERGY...
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Nov 12, 2019 Defense Technical Information Center
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This is a program for the analysis of selected data from the ARPA Energetic Ion Mass Spectrometer Experiment on the OV1-18 satellite. This experiment provided the first evidence for energetic magnetospheric ions with m 4 that have recently been inferred to be O+ ions and to be an important new magnetospheric particle population (Shelley et al., 1972). During this quarter, a comparison of the latitudinal position of the energetic O+ ions with the inferred location of the plasmapause was made for...
Topics: DTIC Archive, Sharp, Richard D, LOCKHEED MISSILES AND SPACE CO INC PALO ALTO CA PALO ALTO RESEARCH...
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The volume presents a comparative analysis of the methods and techniques used by civilian agencies in terms of use by U.S. military froces, and recommendations regarding methods and techniques for accomplishing community and technical development work which may be applicable to Military civic action. Volume II also contains the executive summary, a glossary of abbreviations and the bibliography.
Topics: DTIC Archive, McMullan, Jr , Philip S, RESEARCH TRIANGLE INST RESEARCH TRIANGLE PARK NC OFFICE OF...
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The purposes of the research effort were (1) to study and evaluate methods and techniques employed by U.S. civilian agencies in international development assistance; (2) to compare civilian methods and techniques with similar aspects of military civic action; and (3) to formulate recommendations for direction of military civic action based upon this analysis and comparison.
Topics: DTIC Archive, Harris, III , Benjamin S H, RESEARCH TRIANGLE INST RESEARCH TRIANGLE PARK NC OFFICE...
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Nov 12, 2019 Defense Technical Information Center
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The objective of the research was to determine whether civilian government agencies and nongovernment organizations engaged in international development assistance are employing methods or techniques that might profitably be adopted by U.S. or allied armed forces to enhance their capability to perform military civic action missions.
Topics: DTIC Archive, McMullan, Philip S, RESEARCH TRIANGLE INST RESEARCH TRIANGLE PARK NC OFFICE OF INST...
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Nov 12, 2019 Defense Technical Information Center
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;Contents: Empirical theories about international politics; Australian links with Britain and the United States.
Topics: DTIC Archive, Russett, Bruce M, YALE UNIV NEW HAVEN CT, *POLITICAL SCIENCE, ARMS CONTROL,...
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Nov 12, 2019 Defense Technical Information Center
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An experimental and theoretical study has been initiated on the application of electron-beam-stabilized electrical discharges to the excitation of infrared laser emission from HF and DF molecules. Electric discharge pumping of H2 or D2 vibration is used together with near-resonant V-V transfer to HF or DF. Initial experimental observations of HF fluorescence and absorption in argon, hydrogen, hydrogen fluoride mixtures at 0.25 atm and room temperature confirm the basic principles involved. An...
Topics: DTIC Archive, Byron, S R, MATHEMATICAL SCIENCES NORTHWEST INC BELLEVUE WA, *GAS LASERS, ABSORPTION,...
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Nov 12, 2019 Defense Technical Information Center
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The amorphous to crystalline transition in vacuum deposited tellurium films has been observed using Mossbauer spectroscopy. Although the work is still preliminary, a large difference between the amorphous and crystalline forms of tellurium has been observed in the recoil free fraction as well as a smaller, but measurable, difference between the magnitudes of the quadrupole interactions. The samples studied contain 50% enriched tellurium-125 and are about 2 microns thick. Attempts to form...
Topics: DTIC Archive, Blum, Norman, JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB, *SEMICONDUCTING...
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Nov 12, 2019 Defense Technical Information Center
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In a series of papers the author developed two approaches towards a unified treatment of the General Gauss-Markoff (GGM) linear model (Y, X beta, sigma squared V) where V, the dispersion matrix of Y, may be singular and X may be deficient in rank. One is called the inverse partition (IPM) method which depends on the numerical evaluation of a g-inverse of a partitioned matrix. Another is an analogue of least square theory and is called unified least square (ULS) method. The aim of the paper is...
Topics: DTIC Archive, Rao, C R, PURDUE UNIV LAFAYETTE IN DEPT OF STATISTICS, *STATISTICAL ANALYSIS,...
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Nov 12, 2019 Defense Technical Information Center
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A pool of eight experienced subjects was used in studies of pitch discrimination at 1 kHz in quite loud background noises (up to 95 dB per octave) . Differential thresholds (DF) were collected for both the pitch-memory and pitch-modulation auditory tasks, which differed significantly in absolute DF and in the effects of overall loudness and in signal/noise ratio (S/N). Control experiments showed that neither the S/N at 50% detection, nor the DF, deteriorated over at least a 20-min listening...
Topics: DTIC Archive, Morse, Virginia A, NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT, *PITCH...
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Nov 12, 2019 Defense Technical Information Center
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Intermanual transfer of adaptation to rearranged ear-hand coordination produced after exposure to a 30 degrees shift of the interaural axis was investigated by use of electronic pseudophones (a binaural microphone/ earphone array worn on the head). Results showed that except for one exposure condition, changes in ear-hand coordination that occur to compensate the distortion induced by pseudophones fail to transfer intermanually. Such results suggest a differential representation of the...
Topics: DTIC Archive, Mikaellan, Harutune H, NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT, *AUDITORY...
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Nov 12, 2019 Defense Technical Information Center
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The possible value of monocular motion parallax for improving distance perception under water was investigated. Submerged subjects either kept their heads stationary or rotated their heads about a vertical axis while judging the distance of objects placed 4-15 feet away. Before and after training with feedback to increase judgment accuracy, head movement was related to performance.
Topics: DTIC Archive, Ferris, Steven H, NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT, *SPACE PERCEPTION,...
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Nov 12, 2019 Defense Technical Information Center
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The visual performance of divers was compared through five commercial facemasks. Measurements were made of visual fields, visual acuity, stereoacuity, hand-eye coordination, accuracy of distance estimates, and accuracy of size estimates at both near and far distances. In addition, the optical properties of the masks were measured and the susceptibility of each mask to fogging was tested. There were significant differences between the masks for every visual process tested. Some masks were...
Topics: DTIC Archive, Luria, S M, NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT, *OPTICAL PROPERTIES,...
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Nov 12, 2019 Defense Technical Information Center
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Adaptation to rearranged ear-hand coordination, generated by exposure to an auditory tracking task entailing 30 degrees of functional rotation of the interaural axis was explored using 12 Ss. The results show that sensorimotor alterations that follow such auditory rearrangement are confined to ear-hand responses and do not transfer intermodally to eye-hand coordinations. These findings fail to support the so called 'proprioceptive change' hypothesis of auditory adaptation.
Topics: DTIC Archive, Mikaellan, Harutune H, NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT, *AUDITORY...
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Nov 12, 2019 Defense Technical Information Center
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Research concerned with organizational communication is at a stage of development where mapping the communication domain is a prerequisite to relating its dimensions to other organizational variables. Some of the problems involved in, and past efforts concerned with measuring organizational communication are discussed. One further approach to measurement is then described.
Topics: DTIC Archive, Roberts, Karlene H, CALIFORNIA UNIV BERKELEY INST OF INDUSTRIAL RELATIONS,...
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Nov 12, 2019 Defense Technical Information Center
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The generalized lattice point (GLP) problem provides a formulation that accommodates a variety of discrete alternative problems. In the paper the authors show how to substantially strengthen the convexity cuts for the GLP problem. The new cuts are based on the identification of synthesized lattice point conditions to replace those that ordinarily define the cut. The synthesized conditions give an alternative set of hyperplanes that enlarge the convex set, thus allowing the cut to be shifted...
Topics: DTIC Archive, Glover, Fred, TEXAS UNIV AT AUSTIN CENTER FOR CYBERNETIC STUDIES, *LINEAR...
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Nov 12, 2019 Defense Technical Information Center
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The paper shows that any generalized network problem can be transformed into a generalized transportation problem. The approach extends earlier procedures for transforming pure network problems to ordinary transportation problems. Also shown is that start and solution algorithms developed for certain classes of generalized network problems can be applied to any generalized network problem.
Topics: DTIC Archive, Glover, Fred, TEXAS UNIV AT AUSTIN CENTER FOR CYBERNETIC STUDIES, *OPERATIONS...
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Nov 12, 2019 Defense Technical Information Center
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The augmented predecessor indexing method is a procedure for efficiently updating the basis representation, flows and node potentials in an adjacent extreme point (or 'simplex' type) method for network problems, using ideas due to Ellis Johnson in his proposed application of a triple-label representation to networks. The procedure is extended here to accommodate the more complex basis structures and updating processes of the generalized network problem, specifying rules for expediting the...
Topics: DTIC Archive, Glover, Fred, TEXAS UNIV AT AUSTIN CENTER FOR CYBERNETIC STUDIES, *OPERATIONS...
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Nov 12, 2019 Defense Technical Information Center
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The paper presents a computationally efficient method for solving generalized network problems with an additional linear constraint. The method is basically the primal simplex method specialized to exploit the topological structure of the problem. The method is similar to the specialization of Charnes and Cooper's Double Reverse Method by Meier, and Klingman and Russell for constrained pure network problems. It couples the augmented predecessor index method with a double pricing procedure to...
Topics: DTIC Archive, Glover, Fred, TEXAS UNIV AT AUSTIN CENTER FOR CYBERNETIC STUDIES, *OPERATIONS...
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Nov 12, 2019 Defense Technical Information Center
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Cavitation-inception tests were performed on two headforms for which changes were made in the environment. Quantities which were varied, included type and amount of dissolved gas, chemical additives, time rate of change to cause inception, and temperature changes. Experimental procedure and relative air content had an appreciable effect on cavitation inception. Both headforms had the same designed minimum pressure coefficient; however, for one it was located 0.03 diam from the nose, and for the...
Topics: DTIC Archive, Brockett, Terry, DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA...
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The effect of a deployed air cushion landing gear on the stability of a high performance aircraft was studied at the Naval Ship Research and Development Center's 8 x 10 foot subsonic wind tunnel. Air cushion designs submitted by Bell Aerospace Corporation and Boeing were fitted to a ten percent scale A-4E and air cushions designed by Goodyear (two configurations), San Diego Aircraft Engineering Incorporated (SANDAIRE), and Bell were fitted to a ten percent scale F-8C. The effects of the air...
Topics: DTIC Archive, Davidson, Jr , H D, DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER...
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Nov 12, 2019 Defense Technical Information Center
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The report describes the techniques and results of an investigation of the susceptibility of 1N23 point-contact microwave diodes to RF (9.375 GHz) energy. Using a minimum change in noise figure of 10 dB as the failure criterion, failure levels have been determined as a function of pulse width, pulse repetition frequency, and the number of pulses applied. The two significant results obtained are that the 50-percent failure level is independent of pulse repetition rate at least up to 10 KHz and...
Topics: DTIC Archive, Amadori, R A, NAVAL WEAPONS LAB DAHLGREN VA, *SEMICONDUCTOR DIODES, DAMAGE, X BAND,...
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Tolerance limits are formulated for the Maxwell distribution, and a table of tolerance limit factors for the upper tolerance bound is provided as a function of P (percent of the population below the bound), gamma (confidence level), and n (sample size). Values of P, gamma, and n considered are P = .50, . 75, .90, .95, .99; gamma = .75, .90, .95, .99; n = 2(1)25(5)100(10)200(50) 300(100)1000, infinity. While the formulation is sufficiently general to be of use to anyone who deals with Maxwell...
Topics: DTIC Archive, Thomas, Marlin A, NAVAL WEAPONS LAB DAHLGREN VA, *PROJECTILES, *STATISTICAL ANALYSIS,...
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Nov 12, 2019 Defense Technical Information Center
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The report comprises written versions of five lectures given during an introductory course of instruction in marine mammal technology. The topics covered are the history of marine mammal technology, the classification and description of common species, natural and trained behaviors of small cetaceans and sea lions, and methods of capture, selection, and transport.
Topics: DTIC Archive, Goforth, H W, NAVAL UNDERSEA CENTER SAN DIEGO CA, *AQUATIC ANIMALS, *MAMMALS, *MARINE...
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Nov 12, 2019 Defense Technical Information Center
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Students who do not successfully complete naval aviation training are asked to complete an open-ended questionnaire concerning their reasons for entering and leaving the program, their likes and dislikes about the program, and characteristics of their instructors. The purpose of the present study WAS: (1) to develop an objectively structured questionnaire from an analysis of responses of a large sample of attritions to this open-ended questionnaire; (2) to identify the most salient factors...
Topics: DTIC Archive, Waag, Wayne L., NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL, *NAVAL AVIATION,...
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To investigate basic mechanisms operative in high altitude pulmonary edema, pulmonary extravascular water volume (Qpevw) was measured in 11 unanesthetized calves exposed to atmospheres equivalent to 12,000 and 16,000 feet. Measurements were made by a double indicator dilution technique at sea level and after continuous exposure of 24, 48, and 72 hours. Thirty-five duplicate measurements from 15 experiments yielded a test-retest reliability coefficient of 0.84. Data from 15 experiments were...
Topics: DTIC Archive, Smith, Raphael F., NAVAL AEROSPACE MEDICAL RESEARCH LAB PENSACOLA FL, *HIGH ALTITUDE,...
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Nov 12, 2019 Defense Technical Information Center
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An intercultural relations (ICR) - Vietnam (VN) program was designed to provide pre-deployment training to Navy personnel for duty in Vietnam. The interim report examines the degree to which the program was having desired effects. A series of objective instruments was selected for measuring relevant attitudinal change. Baseline data were collected from trainees regarding skills in interpersonal relations, flexibility, leadership style, and level of self- actualization. This information was used...
Topics: DTIC Archive, Lau, Alan W, NAVAL PERSONNEL AND TRAINING RESEARCH LAB SAN DIEGO CA, *CULTURE, *NAVAL...
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Nov 12, 2019 Defense Technical Information Center
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Beagles exposed to 350 rads bilateral (60)Co gamma radiation without subsequent supportive treatment died with an average survival time of 14 days and with the expected signs of the hematopoietic syndrome: leukopenia, fever and bacteremia. Neither the administration of prophylactic antibiotics (sodium ampicillin and gentamicin sulfate) alone nor the transfusion of irradiated erythrocytes and platelets altered the mortality although the antibiotic regimen resulted in a small but significant mean...
Topics: DTIC Archive, Nutter, J E, ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD, *RADIATION...
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Nov 12, 2019 Defense Technical Information Center
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A unit was developed to provide a more versatile, convenient and inexpensive method of testing lag response in tv camera tubes. Lag is measured by exposing the tube to a step transition in irradiance and measuring the resultant transient response. The irradiance is provided by a 4 x 4 array of gallium arsenide phosphide light emitting diodes continually recycled on and off by a digital logic circuit. Controlling the on and off period permits the unit to be used in evaluating tubes which exhibit...
Topics: DTIC Archive, Moore, James M, NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AERO-ELECTRONIC TECHNOLOGY...
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Nov 12, 2019 Defense Technical Information Center
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The report is a summary of glass research undertaken during a five year period (1967-72) under the sponsorship of the Advanced Research Projects Agency. Research areas which are reviewed include structure of glasses, synthesis and preparation of glasses, electronic structure of silica, ultraviolet spectra of silicate glasses, electron spin resonance in borate glasses, structural and electrical properties of chalcogenide glasses and ion bombardment effects on the strength of glass.
Topics: DTIC Archive, Ginther, Robert J, NAVAL RESEARCH LAB WASHINGTON DC, *GLASS, ABSORPTION SPECTRA, BAND...
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Minol II (40% ammonium nitrate, 20% aluminum) is useful as an explosive fill for bombs, because its use substitutes cheap, and abundant, ammonium nitrate (AN) for more expensive, and sometimes scarce, TNT. However, Minol II exhibits poor dimensional stability when exposed to temperature cycles during storage. It has been shown that growth of Minol II charges during temperature cycling is caused by the polymorphic phase transition which occurs in AN above 32C. Review of the literature suggested...
Topics: DTIC Archive, Boyars, Carl, NAVAL ORDNANCE LAB WHITE OAK MD, *EXPLOSIVES, CRACKS, THERMAL...
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A new plastic bonded explosive composed of HNS and Teflon was used in seismic charges on the recent APOLLO 17 space mission. Eight of the explosive charges were transported to the lunar surface abroad the LM vehicle and were subsequently detonated from earth. This report is concerned with the physical and detonation properties of dry blended HNS/TEFLON explosive charges and how such charges responded to environmental conditioning. Thermal cracking of the charges occurred, but this cracking did...
Topics: DTIC Archive, Kilmer, E Eugene, NAVAL ORDNANCE LAB WHITE OAK MD, *EXPLOSIONS, *LUNAR ENVIRONMENTS,...
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Nov 12, 2019 Defense Technical Information Center
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Several theories have suggested the possibility that the space-time metric of a rotating disk could be nonstatic as well as non-Euclidean. These, and also a theory of optical aberration based on the Thomas precession of vectors, predict a (real or apparent) decrease in angular velocity with radius, even in an ideally 'rigid' disk, with a rim lag time period of alpha v squared/c squared, where v is rim speed, c is light speed, and alpha is a constant between 1 and 1/6, depending on the theory. A...
Topics: DTIC Archive, Phipps, Jr, Thomas E, NAVAL ORDNANCE LAB WHITE OAK MD, *NAVIGATIONAL AIDS,...
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Nov 12, 2019 Defense Technical Information Center
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The report describes a method for evaluation of heat seeking missiles and discusses preliminary activities, equipment, and facilities required. Provided are procedures for gyro spin-up time, gyro spin-up current, gyro spin- down time, maximum look angle, recovery time, maximum slew rate, gyro drift, signal-to-noise ratio, cool-down time, field-of-view, caging accuracy, static gain, spectral responsivity, intercept ability, gyro spin versus slew rate, maximum tracking versus gyro spin, maximum...
Topics: DTIC Archive, ARMY TEST AND EVALUATION COMMAND ABERDEEN PROVING GROUND MD, *GUIDED MISSILES, *TEST...
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Nov 12, 2019 Defense Technical Information Center
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The publicity accruing to the trials and investigations associated with the My Lai Incident, which occurred in the Republic of Vietnam on 16 March 1968, raises the question: What has the Army learned from My Lai. The document considers: Training in the Geneva Conventions (GC) and Rules of Engagement (ROE); the impact on the Army's professional integrity; and public information considerations.
Topics: DTIC Archive, Schopper, Jared B, ARMY WAR COLL CARLISLE BARRACKS PA, *LIMITED WARFARE, ARMY...
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Nov 12, 2019 Defense Technical Information Center
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The problem to which work reported addressed itself is, briefly, how can one predict the aerodynamic characteristics of airfoils at transonic speeds simply while at the same time including the effects of fluid viscosity.
Topics: DTIC Archive, Smetana, F O, NORTH CAROLINA STATE UNIV AT RALEIGH DEPT OF MECHANICAL AND AEROSPACE...