| Dual Mode Coherent/Direct Detection Eyesafe Wavelength Ladar Transmitter |
26 FEB 1999 |
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| Authors:
G. Bennett; T. Monarski; A. Oien; J. Koshel; D. Smith; COHERENT TECHNOLOGIES INC LAFAYETTE CO
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 | Data are presented on a variable coherence length, eyesafe wavelength laser transmitter that is injection seeded to function in either direct or coherent detection mode with hard target ladar transceivers. Flexible spectral widths and the potential for flexible pulse formats provide paths towards enhanced signal-to-noise ratio through control of speckle, thereby allowing recovery of 1, 2, and 3-D intensity images or surface vibrational images over a wide range of target ... |
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| Civil Reserve Air Fleet (CRAF) Carrier Commercial Access to Military Installations for Non-DoD Operations |
25 OCT 95 |
15 pages |
| Authors:
D. Smith; OFFICE OF THE UNDER SECRETARY OF DEFENSE (ACQUISITION AND TECHNOLOGY) WASHINGT ON DC PROGRAM AND BUDGET
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 | This Instruction implements policy, assigns responsibilities, and prescribes procedures under Deputy Secretary of Defense Policy Memorandum, 'Civil Reserve Air Fleet (CRAF) - Commercial Use of Military Airfields,' January 11, 1995, for implementation of the CRAF Commercial Access to Military Installations (CAMI) program. It implements Section 9513 of Title 10, United States Code. This Instruction implements the portion of the National Airlift Policy (National Security Decision Directive 280, 'National Airlift Policy,' ... |
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| Using the CoRE Requirements Method with ADARTS. Version 01.00.05 |
MAR 94 |
179 pages |
| Authors:
H. Lykins; R. Kirk; D. Smith; SOFTWARE PRODUCTIVITY CONSORTIUM HERNDON VA
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| This technical report explains how you can use the Ada-Based Design Approach for Real-Time Systems (ADARTSSM) to build a software design that satisfies software requirements specified using the Consortium Requirements Engineering Method (CoRE). ADARTS is a widely accepted object-oriented method for system and software development that results in a robust design that is well documented, meets timing requirements, can withstand change, and contains many reusable components. CoRE is a new ... |
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| Optimum TiB2 Ceramic Powder for Composite Thermistors |
90 |
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| Authors:
T. R. Shrout; A. Casciani; M. Mulvihill; D. Smith; W. Heubner; PENNSYLVANIA STATE UNIV UNIVERSITY PARK MATERIALS RESEARCH LAB
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| Positive temperature coefficient of resistance(PTCR) thermistors are used in applications such as temperature sensors, flow meters and protection devices against voltage and current surges. The most commonly employed thermistor materials have been doped BaTiO3 ceramics. Desired qualities of PTC composite thermistors include: (i) low room temperature resistivity; (ii) a"sharp" transition to the high resistivity state at some critical temperature T(sub c); (iii) a large change in resistivity during the transition; ... |
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| Research on Cryogenic Vacuum Tunneling |
DEC 86 |
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| Authors:
C. F. Quate; S. A. Elrod; A. Bryant; S. Park; D. Smith; STANFORD UNIV CA EDWARD L GINZTON LAB OF PHYSICS
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| Tunneling microscopy has been investigated as a new tool for studying surfaces over a wide range of temperatures. It proved feasible to use tunneling to measure the super-conducting energy gap in a high temperature superconductor. The first time one can monitor the variations in this gap as a function of the spatial position on the surface. Keywords: Tunneling microscopy; Grain structure; Conducting tip; Tunneling spectroscopy; Spatial variations; Copper Alloy; Titanium ... |
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| Collapse of the MRL 38 MM Shaped Charge - A Data Base for Computer Modelling |
OCT 86 |
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| Authors:
I. Macintyre; D. Smith; MATERIALS RESEARCH LABS ASCOT VALE (AUSTRALIA)
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| Detailed results are presented from experimental studies of the collapse and jet formation in the MRL 38mm shaped charge. These results provide a data base which is valuable for assessing the accuracy of computer models used to predict shaped charge behaviour. Experimental results obtained by flash radiography are compared with predictions from the two-dimensional hydrodynamic code HELP. Keywords: Australia; Data acquisition; Computer programs; Hydrocodes. (Author) |
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| Design and Manufacturing of Advanced Composite Tubes for a Communications Spacecraft, |
OCT 1985 |
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| Authors:
H. Hillesland; D. Smith
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| Advanced fiber reinforced composite tubular components were utilized in a number of structural applications in communications spacecraft. Design tradeoff studies that include a variety of structural parameters, thermal stability, low coefficient of expansion, ease of manufacturing, and spacecraft component assembly indicate advanced composite tubular components to be one of the most efficient techniques for meeting three critical requirements. The basic design parameter, materials selection, and manufacturing methods of a typical ... |
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| INSPECTION OF INTERMEDIATE LEVEL WASTE (ILW) MONOLITHS BY HIGH ENERGY RADIOSCOPY |
SEP 85 |
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| Authors:
d. a. w. pullen; S. F. Burch; A. I. Lewcock; W. N. Reynolds; D. Smith
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| the storage and disposal of nuclear waste requires effective quality assurance of the immobilization process. it is proposed that intermediate level wastes (ilw) are mixed with concrete or other binding materials and cast into steel drums. it will be necessary to examine the filled and cured drums ideally by nondestructive techniques, in order to confirm the integrity of the monolith (filling). various methods of nondestructive evaluation have been considered. one ... |
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| Ionic Reactions of Atmospheric Importance |
31 AUG 1984 |
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| Authors:
D. Smith; N. Adams; BIRMINGHAM UNIV (ENGLAND) DEPT OF SPACE RESEARCH
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| A variable-temperature flowing afterglow/Langmuir probe (VT-FALP) apparatus has been used to study several electron-ion dissociative recombination reactions and several electron attachment reactions. Thus the variation with temperature of the respective dissociative recombination coefficients, alpha and electron attachment coefficients, beta have been determined. The recombination studies have included the species 02+, NO+, NH4+, H3, HC0+, N2H+ and CH5+, and the attachment studies have included the species CC14, CC13F, CC12F2, CHC13, C12, ... |
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| Ionic Reactions of Atmospheric Importance |
30 NOV 1983 |
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| Authors:
D. Smith; N. G. Adams; BIRMINGHAM UNIV (ENGLAND) DEPT OF SPACE RESEARCH
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| A variable-temperature flowing afterglow/Langmuir probe (FALP) apparatus has been used to study the temperature dependence of a number of electron-ion dissociative recombination coefficients, alpha e, and electron attachment coefficients, Beta, over the temperature range 200-600 K. Thus alpha e(02(+)), alpha e(NO+)) and alpha e(NH4+)) have been shown to vary inversely with temperature, T, as alpha e approximately T to the -n power with n = 0.7, 0. 9 and 0.6 ... |
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| Management in a Growing NC (Numerical Control) Maintenance Department. |
SEP 1982 |
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| Authors:
D. Smith
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| The purpose of this paper is to discuss and suggest solutions to some organizational, operational and management problems of a firm which begins with one numerically controlled machine tool and, over time, acquires many more. The importance of recognizing machine tool maintenance as an integral part of a firm's manufacturing capability is stressed. |
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| Performance Analysis of Digital Los Link, Manila Embassy - Santa Rita, Philippines |
DEC 1981 |
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| Authors:
N. J. Sorovacu; D. Smith; D. E. Parker; DEFENSE COMMUNICATIONS ENGINEERING CENTER RESTON VA
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| The U.S. Navy has been tasked to upgrade DCS microwave link M1433, Santa Rita - U.S. Embassy, Philippines, to digital operation using the DRAMA equipment. Impact on bit error rate performance of the new digital radio link caused by a reflection path on Manila Bay is being evaluated in this analysis. Recommendations are made for a link configuration expected to provide an optimum performance in concert with DCS criteria. (Author) ... |
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| High Efficiency Collision-Induced Dissociation in an RF-Only Quadrupole. |
25 JUL 1978 |
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| Authors:
R. A. Yost; C. G. Enke; D. C. McGilvery; D. Smith; J. D. Morrison; MICHIGAN STATE UNIV EAST LANSING DEPT OF CHEMISTRY
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| Collision-induced dissociation (CID), when performed in an RF-only quadrupole is a highly efficient method of fragmenting ions. The low-energy (5-10 eV) CID process, may involve direct vibrational excitation by momentum transfer but in any case, is a very different process from the high energy (3-10 keV) electronic excitation CID process observed in MIKES and CAMS. Experimental results are presented which demonstrate the efficiency of CID fragmentation (up to 65%), the ... |
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| Management Information System for ESD Program Offices. |
MAR 1978 |
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| Authors:
F. Coker; L. Johnson; D. Smith; LOGICON INC LEXINGTON MA
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| This report is the result of an initial study effort to identify the management information needs and to define the requirements for an integrated information system within the AF Electronic Systems Division (ESD) acquisition environment. The Management Information System (MIS) functional requirements for the ESD Program Office are defined in terms of the Computer-Aided Design and Specification Tool. The development of the computer data base and a description of the ... |
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| Radar Microwave Link Pilot System Upgrade and Evaluation. |
DEC 1976 |
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| Authors:
D. Smith; F. G. Kimmett; INSTITUTE FOR TELECOMMUNICATION SCIENCES BOULDER COLO
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| Methods of upgrading the existing Radar Microwave Link systems were developed and tested in the laboratory. Replacement of existing klystron and other tube-type components with solid-state units can be expected to provide additional system fade margin and greater system equipment reliability. (Author) |
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| Fixed Point Aircraft Utility Support System Economic Feasibility Analysis, |
25 JUN 1975 |
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| Authors:
W. Murphy; D. Smith; J. J. Geddes; NAVAL AIR ENGINEERING CENTER LAKEHURST N J GROUND SUPPORT EQUIPMENT DEPT
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| The primary objective of the study is to determine the economic feasibility of providing Naval/Marine Corps air stations with centralized systems which would provide utility service which is presently supplied by mobile ground support equipment (GSE). The services included in this study will be limited to: Starting Air, Cooling Air, Shop Air, 400 Hz and 60 Hz Electrical Power. These services would be distributed to appropriate locations in hangars and ... |
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| Tilting Antennas to Reduce Line-of-Sight Microwave Link Fading. |
FEB 1975 |
45 pages |
| Authors:
W. J. Hartman; D. Smith; INSTITUTE FOR TELECOMMUNICATION SCIENCES BOULDER COLO
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| Tilting the antennas up to obtain 2 dB loss (for each antenna) over maximum gain during steady signal conditions is shown to reduce fading over this particular path. The technique should also work on other paths where sufficient angular separation between the direct and reflected rays exists, and where antennas with sufficiently 'sharp' main beams are used. (Author) |
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| Thermoregulatory Salivation Proportional to Hypothalamic Temperature above Threshold in the Dog, |
30 APR 1974 |
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| Authors:
F. Sharp; D. Smith; M. Thompson; H. T. Hamel; SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CALIF PHYSIOLOGICAL RESEARCH LAB
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| Rats and other mammals produce saliva when exposed to high ambient temperatures. Saliva is produced in the rat to regulate the body temperature during environmental heat stress, with the estimated water loss due to salivation increasing continuously with temperature. Shivering and panting in the dog have been described as being activated by a proportional control with an adjustable set point. For shivering and panting, the porportionality constant, for each response ... |
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| Evaluation of Techniques for Improving the Performance of Radar Microwave Link Systems. |
OCT 1973 |
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| Authors:
D. Smith; C. A. Samson; R. E. Skerjanec; OFFICE OF TELECOMMUNICATIONS BOULDER COLO INST FOR TELECOMMUNICATION SCIENCES
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| Techniques for improving the performance of radar microwave links were evaluated. State-of-the-art modules such as a tunnel diode amplifier, balanced mixer, Gunn diode local oscillator, and a solid-state IF amplifier were procured and evaluated in the laboratory. Selected components were then tested in an operational system for 3 months, and recordings of received signal level on two adjacent links were correlated with existing weather conditions and system outages. The results ... |
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| FLASH AND FIRE TEST EVALUATION OF THE BEHAVIOR OF NONMETALLIC MATERIALS IN HYDROGEN. |
MAR 72 |
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| Authors:
D. Smith; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HOUSTON TEX MANNED SPACECRAFT CENTER
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| Ten nonmetallic materials are evaluated for their flash and fire points in hydrogen. Tests are conducted using the basic MSC-PA-D-67-13 pro- cedure as outlined in Test Directive TD-MIS-006, Revision B. None of the materials evaluated exhibit a flash or fire point in either helium or hydrogen up to a temperature of 600 F. Two of the materials, poly-vinylchloride and cellulose acetate butyrate, are thermally effected by the tests in both ... |
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| COMPARISON OF SIMULTANEOUS LINE-OF-SIGHT SIGNALS AT 9.6 AND 34.52 GHZ. |
DEC 1968 |
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| Authors:
H. B. Janes; M. C. Thompson Jr.; D. Smith; A. W. Kirkpatrick; INSTITUTE FOR TELECOMMUNICATION SCIENCES BOULDER COLO
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| Signals at 9.6 and 34.52 GHz, propagated simultaneously over a slant, line-of-sight, overwater path, were analyzed to compare the power spectra of phase-of-arrival variations and fading and to determine the coherence of these signals with regard to both phase variations and fading. The phase data at the two radio frequencies exhibited nearly identical power spectra from 0.01 to 5 Hz and very high coherence from 0.01 to 0.1 Hz. The ... |
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| REACTIONS OF O(+) IONS IN HELIUM-OXYGEN AND HELIUM-OXYGEN-NITROGEN MIXTURES. |
SEP 1966 |
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| Authors:
D. Smith; M. J. Copsey; R. A. Fouracre; BIRMINGHAM UNIV (ENGLAND) DEPT OF ELECTRON PHYSICS
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| Observations are reported concerning the decay of O(+) ions in helium-oxygen mixtures over the approximate temperature range 200 - 600K and in helium-oxygen-nitrogen mixtures at 300K. From these observations, values for k sub O and k sub N, the rate coefficients for the reaction of O(+) ions with molecular oxygen and molecular nitrogen respectively, were obtained. The values at 300K are: k sub O = (2.0 +0.4 or -0.3) x ... |
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| EXPERIMENTAL STUDY OF ATMOSPHERIC ERRORS IN MICROWAVE AZIMUTH MEASUREMENTS. |
JUL 1966 |
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| Authors:
M. C. Thompson; H. B. Janes; D. Smith; INSTITUTE FOR TELECOMMUNICATION SCIENCES AND AERONOMY BOULDER COLO
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| An experimental study was made of errors contributed by the atmosphere in azimuth angle measurements made with short-baseline microwave systems. Time variations in the azimuth of a fixed target were found to decrease with increasing radio frequency in the range of 9.4 to 35 GHz. Ground multipath is indicated as the principal source of these variations which are characterized, especially at the lower frequencies, by long-term trends and lack of ... |
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| Electrostatic Printing Methods and Application to Plastics, |
10 JUN 1966 |
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| Authors:
D. Smith
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| The problems of printing electrostatically on any substrate may be considered on the basis of those related to the printing process itself, the materials with which the printing is accomplished and the end use requirements. The process must be capable of controlling the movement of electrostatically charged colorant in an electrostatic field which is established between the image-bearing member and the substrate to be printed. The establishment of the transfer ... |
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| FURTHER STUDIES OF ATMOSPHERIC ERRORS IN MICROWAVE AZIMUTH MEASUREMENTS, |
15 NOV 1965 |
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| Authors:
M. C. Thompson Jr.; H. B. Janes ; D. Smith; CENTRAL RADIO PROPAGATION LAB NATIONAL BUREAU OF STANDARDS BOULDER COLO
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| Results of four experiments are presented in a further study of errors contributed by the atmosphere in azimuth angle measurements made with short-baseline microwave systems. Time variations in the azimuth of a fixed target were found to decrease with increasing radio frequency in the range of 9.4 to 35-GHz. Ground multipath is indicated as the principal source of these variations which are characterized, especially at the lower frequencies, by long-term ... |
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| OBSERVATIONS OF IONIC PROCESSES IN GASEOUS AFTERGLOWS. |
31 JUL 1965 |
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| Authors:
M. J. Copsey; D. Smith; BIRMINGHAM UNIV (ENGLAND) DEPT OF ELECTRON PHYSICS
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| Time resolved measurements of ion and electron number densities in inert gas afterglows are described in detail. Inconsistencies between these two types of measurement, and between these and similar measurements by other workers, are shown to be largely removed by improvements in the mass spectrometric technique. The most recent observations in helium and neon in the pressure range 0.15 to 1.0 torr indicate, contrary to the earlier measurements, that three-body ... |
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| IONIC REACTIONS IN THE IONOSPHERIC GASES. |
01 JAN 1964 |
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| Authors:
M. J. Copsey; D. Smith; BIRMINGHAM UNIV (ENGLAND)
|
| A description is given of work concerned with the measurement of the decay constants of the atomic ions He(+), Ne(+) and Ar(+) in their pure parent gases by monitoring the density of these species as a function of time in an afterglow using a time-resolving mass spectrometer and the decay of electron density in these pure gases using a Langmuir probe. |
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| THE STUDY OF IONIC PROCESSES IN GASEOUS AFTERGLOWS. |
OCT 1963 |
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| Authors:
D. Smith; M. J. Copsey; J. Sayers; BIRMINGHAM UNIV (ENGLAND)
|
| The report is concerned with measurements of the decay of the densities of ion species in the afterglows following pulsed radiofrequency discharges in atmospheric gases, in order to determine the reaction rates at thermal energies between various ions and neutral species. The following reactions have been investigated: (1) The decay of the helium ion density in pure helium afterglows and the subsequent deduction of the ambipolar diffusion coefficient of the ... |
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| An Investigation of the Optical Properties of Fiberglass Reinforced Translucent Panels, Part II, An Interim Report, |
06 FEB 62 |
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| Authors:
J. B. Crenshaw; D. Smith
|
| The changes in properties on exposure are reported for a series of translucent panels prepared from fiberglass mat are reinforced polyester resins containing certain inhibitors, light stabilizers, catalyst sytems and monomer systems and molded at several cure cycles. (Author, modified). |
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| An Investigation of the Optical Properties of Fiber Glass Reinforced Translucent Panels, |
04 FEB 58 |
|
| Authors:
D. Smith; J. B. Crenshaw
|
| The results of an investigation of the optical properties of fiber glass reinforced translucent sheet fabricated with unsaturated polyester resin containing acrylic monomers (and the effect of such monomers on the wetting and curing properties of the resin) are presented. A number of polyester resins were prepared to contain certain inhibitors, light stabilizers, catalyst systems and momomer systems. The monomer systems included styrene, vinyl toluene, methyl methacrylate and n-butyl methacrylate ... |
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Reports by Author
