WorldCat Identities

AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA

Overview
Works: 484 works in 490 publications in 1 language and 496 library holdings
Classifications: QC912.3,
Publication Timeline
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Most widely held works by AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA
High-altitude nuclear detonation opticalinfrared effects( Book )

2 editions published in 1964 in English and held by 2 WorldCat member libraries worldwide

Optical-IR radiation data were obtained on Shots Star Fish Prime, Check Mate, Blue Gill Triple Prime, King Fish, and Tight Rope from both aircraft stations and Johnston and Maui Island stations. The spectral radiance observed by each channel for each shot is presented in graphical form as a functio of time. In general, data are presented from approximately H + 25 msec to as lng as a signal above background was observed. No data on the initial pulse (H + 0.5 msec to approximately H + 25 msec) are shown. (Author)
Proceedings of seminar on speech compression and processing, l.g. hanscom field, bedford, massachusetts september 28-30, 1959( Book )

2 editions published between 1959 and 1960 in English and held by 2 WorldCat member libraries worldwide

Handbook of Geophysics and Space Environments. Chapter 17. Corpuscular Radiation( Book )

1 edition published in 1968 in English and held by 2 WorldCat member libraries worldwide

The paper is a summary of available information on the corpuscular radiation environment in the vicinity of the earth and in the earth's atmosphere; radiation trapped in the magnetosphere (Van Allen belts), galactic cosmic rays, and high-energy solar particles (solar cosmic rays) are described. The topics presented are: the motions of charged particles in the geomagnetic field; the spatial and temporal distributions, intensities, and energies of electrons and protons trapped in the earth's magnetic field; the composition, intensity, energy spectrum and variations of galactic cosmic rays; and the composition, intensities, anisotropy, and variations of the high-energy charged-particles emitted sporadically by the sun in association with solar flares and other solar disturbances
Aircraft and Radar Weather Data Analysis for PVM-5. AFCRL/Minuteman Report Number 1( Book )

1 edition published in 1974 in English and held by 2 WorldCat member libraries worldwide

Aircraft and radar weather data recorded for support of the Minuteman PVM-5 test are presented. The link-offset mode was used successfully to obtain radar data for correlation with the aircraft data. The correlation data were quite good, and provided usable relations of reflectivity factor (Z) and water content (M) on five of nine passes. Application of the Z-M relations to the reflectivity data recorded along the re-entry trajectories provided estimates of the water content profile and the weather severity index (WSI) for each of the trajectories
Kinetic methods and the free expansion problem( Book )

1 edition published in 1962 in English and held by 2 WorldCat member libraries worldwide

An investigation is made of various techniques used to treat rarefied gases by means of kinetic theory. Two formal parametric expansions, the Chapman-Enskog procedure and Knudsen iteration, are reviewed as applied to the single relaxation time (Krook) model. A brief presentation of the Grad moment method is given, and the thirteen-moment equations are discussed. The Krook model is formally solved, and the solution is compared with the result of the Chapman-Enskog procedure. An approximation method is suggested to account for the existence of a time-like boundary layer in solutions of the kinetic equation. The free expansion of a gas is considered, and two well-known exact solutions for the Euler and Knudsen limits are quoted. Interpolation formulas are constructed to connect exact solutions for both limits through the entire range of Knudsen number. The possibility of incorporating kinetic effects into the known solutions by using other methods is also discussed. (Author)
Proceedings, AFCRL Scientific Balloon Symposium (6th)( Book )

1 edition published in 1970 in English and held by 2 WorldCat member libraries worldwide

The publication contains the papers presented at the Sixth AFCRL scientific Balloon Symposium held to promote the exchange of current information among balloon designers, developers, and flight managers and researchers engaged in scientific balloon programs. Subjects include: balloon-borne experiments in high-energy astrophysics, detection of atmospheric tides near 48 km, sun- oriented atmospheric optics, a proposed balloon mission in the Venus atmosphere, a panel on balloon materials and testing, telemetry and balloon-control instrumentation, advanced balloon technology, high altitude station-keeping balloons, the AFCRL tethered-balloon facility, advances in meteorological balloons, and superpressure balloons in the tropical stratosphere
Extremes of Hydrometeors at Altitude for MIL-STD-210B( Book )

2 editions published in 1972 in English and held by 2 WorldCat member libraries worldwide

Extremes of precipitation aloft--which would be exceeded with only 0. 5 percent probability in the rainy tropics during the rainiest months--are mandatory for design of military equipment that must operate at altitude any place in the world. Also needed are greatest extremes at altitude which should be considered in design when equipment failure, during encounters of improbable intensities, would endanger human life. Frequency distributions of such rainfall intensities and the associated liquid water content in the precipitation and clouds are not available in the climatic inventory. By extrapolating upward, there are developed nearly instantaneous surface precipitation intensities with appropriate probabilities, utilizing available research data, four models, and tabulations of water content aloft. Complete findings are presented in a single table which includes intensities, liquid water content of precipitation, and liquid water content of cloud particles for nine levels up to 18 km for storms applicable to MIL-STD-210B design philosophy
Electromagnetic boundary waves. an introduction( Book )

1 edition published in 1963 in English and held by 1 WorldCat member library worldwide

The theory of electromagnetic boundary waves is developed from Maxwell's equations, with emphasis on surface and leaky waves. First, a simple case of surface and leaky wave excitation is analyzed. The characteristics of inhomogeneous plane waves are then derived and related to the general prop erties of boundary waves along plane interfaces. The diverse types of boundary waves arising in waveguiding, refraction, diffraction, and propa gation are then displayed. Surface waves on guiding structures, and the radiation mechanism of both surface and leaky waves on finite-length structures, are explored in some detail. (Author)
Gain maximization and controlled null placement simultaneously achieved in aerial array pattern by Charles J Drane( Book )

1 edition published in 1969 in English and held by 1 WorldCat member library worldwide

This paper presents a matrix method for maximizing aerial directive gain while simultaneously placing nulls in the far-field radiation pattern of the array. The technique is applicable to linear aerial arrays of N elements, arbitrarily spaced, and allows the designer to specify the directions of up to (N - 1) independent pattern nulls and/or sidelobes, while providing maximum gain in some prespecified direction. This control is achieved by varying only the amplitude and phase of the element currents. The method can be used even when element factors and interelement mutual coupling is included in the expression for directive gain. (Author)
Low reflection absorbers for electromagnetic waves( Book )

2 editions published in 1960 in English and held by 1 WorldCat member library worldwide

Low reflecting absorbers for electromagnetic waves in the range of m- and cm- wavelengths are used in research - f. expl. for coating the walls of test rooms and in radar technique. The major aspect of the development of absorbers is the elimination of reflections which under vertical incidence of waves on plane surfaces occur at almost all dissipative materials. This reduction of reflections may be attained in different ways: by a continual transition from free space into the absorbing material, by using resonance arrangements, or with the help of certain absorbing substances with uniform, spatial distribution. Wedge-, pyramid-, and rib-absorbers; foil-, layer-, dipole-, slit-, and loop-absorbers; absorbers with low density material and epsilon = micron-absorbers: These various absorbers resulting from the three basic principles of reduction of reflections are treated with respect to the dependence of their reflection coefficients on frequency, angle of incidence, and direction of polarization and finally the thickness of the arrangement. Numerous theoretical and experimental data indicate the most favorable design and the range of application of the individual absorbers. In addition to the statements put forward for absorbers for electromagnetic waves short remarks are made concerning the corresponding absorbers for air - or water-borne sound, which are physically closely related to the electromagnetic absorbers and have in part been prototypes for the latter. Finally test methods for low reflection absorbers (measurement in the free field and in the echo chamber) and their application in electromagnetically oanechoic rooms are discussed
Absorption analysis applied to neutrons in a thermal column( Book )

2 editions published in 1960 in English and held by 1 WorldCat member library worldwide

The energy spectrum of diffuse neutrons in the thermal column of the MIT reactor was determined by analyzing transmission data. The results are compared to a Maxwellian distribution and to an experiment done on collimated thermal neutrons. (Author)
Determination of electron density using the microwave cavity technique( Book )

1 edition published in 1961 in English and held by 1 WorldCat member library worldwide

The microwave cavity method of plasma diagnostics is discussed. This study includes theoretical background, as well as the development of a simple relationship of resonant frequency shift to electron density. Mathematical treatment of an actual experiment is given, with results (in good agreement with previous measurements) presented for the afterglow decay of electron density in a neon plasma. There are several innovations in electronic circuitry described, including (1) techniques for the production of ionization pulses of a more precisely controlled nature than previously employed and (2) a graphic readout of cavity resonance shift on a cathode ray oscilloscope. (Author)
The chemistry and vertical distribution of the oxides of nitrogen in the atmosphere( Book )

2 editions published in 1954 in English and held by 1 WorldCat member library worldwide

A catalogue of positional data of the U.S. earth satellite 1958 Zeta (project score) by W. S Ripley( Book )

1 edition published in 1960 in English and held by 1 WorldCat member library worldwide

APPLICATIONS OF TUNNELING TO ACTIVE DIODES( )

1 edition published in 1962 in English and held by 0 WorldCat member libraries worldwide

Calculated curves are given showing the solubilities of substitutional and interstitial Cu in GaAs in the presence of given amounts of donor and acceptor impurities as a function of temperature. The solubility of Cu was measured in pure and extrinsic p-type GaAs, Ge, and Si, and the results give the solubilities of the substitutional and interstitial species separately. A formula is given for the effective diffusion coefficient in intrinsic and extrinsic n-type semiconductor. Curves giving the intrinsic carrier concentrations at high temperatures in Ge, Si, and various 3-5 compounds are given. An elementary theory of the liquidus curve is 3-5 compound phase diagrams is derived and compared with experiment. New data for GaP solubility in Ga are given which are much lower than that reported elsewhere. The mean free paths of hot electrons in K, Al, and Au as a function of energy are calculated using the theories developed by Wolff and Quinn. Serious discrepancies between these calculations and some recent experimental values are discussed
Empirical determination of scattered light transport through the lower atmosphere by George F Riley( )

1 edition published in 1968 in English and held by 0 WorldCat member libraries worldwide

The transmissivity of the lower atmosphere for thermal radiation from an isotropic source to a flat receiver was obtained as a function of the distance of the receiver from the source and various meteorological conditions. The results of this investigation are based on data taken over ranges from 0.2 to 25 km with values of sigma R between 0.02 and 40
A Systems Analysis ; A Functional Organization ; A Customer Users Library (CUL) by Eunice C Cronin( )

1 edition published in 1972 in English and held by 0 WorldCat member libraries worldwide

A systems analysis technique is applied to the scientific problem solving requirements of a major Air Force research organization to establish: The functional organization of a research support group; A valuable data base for a Customer User Library (CUL); and A Management Information System for scheduling, reporting and control. The report summarizes the functional organization of the Analysis and Simulation Branch of the Computation Center at AFCRL as derived from an analysis of the spectrum of analytical and computational problems originating in the Laboratories. A detailed description the structure and mode of operation of the Customer User Library is provided, together with a discussion of the associated Management Information System. An extensive listing of scientific problem abstracts is provided in the Appendices
Some metric considerations in pattern recognition by Theodore A Kalin( )

1 edition published in 1961 in English and held by 0 WorldCat member libraries worldwide

The lack of traceable nerve pathways in the visual cortices of mammals has, in the last decade, generated speculation about machines which might learn to recognize visual patterns but which would be randomly wired to their source of information. This report analyzes such devices and shows that at least certain mild constraints of a distance-ordering sort must be imposed upon random connections. Mammalian visual system neuroanatomy is then reexamined in this light
Elastic Constant Measurements of Polycrystalline Infrared Window Materials( )

1 edition published in 1975 in English and held by 0 WorldCat member libraries worldwide

In this work elastic constants of some infrared window materials were calculated from ultrasonic measurements using a pulse overlap technique. Velocity measurements were determined in various directions in CVD zinc selenide and in hot forged KCl alloy windows. These measurements permitted the determination of Young's Modulus, the shear modulus, the bulk modulus, and Poisson's Ratio. Some anisotropy was found in the elastic properties of these fabricated or 'as-grown' infrared windows. For example, in the case of the chemically vapor deposited ZnSe which exhibits a small amount of elastic anisotropy, the elastic properties were found to be isotropic in all directions normal to the growth direction. The modulus values observed for directions in the plane of the zinc selenide window were found to change by approximately two percent when measured in directions parallel to the plate growth direction. The experimental results obtained were, in some cases, compared with various calculation approximations which yield polycrystalline elasticity parameters from single crystal data
 
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English (26)