Guide to the Interpretation of Space Group Symbols
Author : Stanley K. Dickinson
Publisher :
Page : 46 pages
File Size : 45,74 MB
Release : 1965
Category : Crystal lattices
ISBN :
U. S. Government Research and Development Reports
Author :
Publisher :
Page : 1776 pages
File Size : 48,58 MB
Release : 1965
Category : Science
ISBN :
Book Description
Technical Abstract Bulletin
Author :
Publisher :
Page : 684 pages
File Size : 21,95 MB
Release :
Category : Science
ISBN :
Book Description
On the Theory of Boolean Formulas
Author : Lorenzo Calabi
Publisher :
Page : 50 pages
File Size : 37,14 MB
Release : 1965
Category : Algebra, Boolean
ISBN :
Book Description
Substitution operators for subformulas of Boolean formulas are introduced and investigated.
Experimental Study of Zone Refining of the Binary System Triphenyl Antimony-benzoic Acid
Author : Marvin S. Brooks
Publisher :
Page : 94 pages
File Size : 39,10 MB
Release : 1965
Category : Antimony
ISBN :
Book Description
An experimental study on the zone refining of the binary system triphenyl antimony-benzoic acid is described. The isotope Sb124, which is a strong gamma emitter, was employed as a tracer; this allowed a rapid in situ nondestructive analysis, closely spaced experimental points, and the opportunity to study distribution as a function of varying experimental conditions. With the aid of computers (IBM 7090 and IBM 7044) apparent k's were calculated and the experimental data compared with those predicted from various mathematical models. (Author).
On the Resolving Power of Ground Mapping Radar Antennas
Author : J. F. McIlvenna
Publisher :
Page : 66 pages
File Size : 35,34 MB
Release : 1965
Category : Aerial photography
ISBN :
Book Description
The mapping of extended, cultural ground targets by an airborne radar is examined using communication theory concepts including those of the antenna transfer function and the target spatial frequency spectrum. Use of the set of transfer functions that correspond to Taylor aperture distributions and specification of the targets directly in terms of their spatial frequency spectra, permits one to examine the antenna images for quality and resolution. The results obtained indicate that resolution for a class of ground targets can be much better than is predicted by the two-point Rayleigh resolution criterion. It is also true that there can be situations in which the shape of the antenna images are quite independent of the radiation pattern. Several types of spatial noise were also included in the input spectrum to investigate noise effects on image quality and resolution. (Author).
Electromagnetic Properties of a Plasma-covered Antenna
Author : Daniel J. Jacavanco
Publisher :
Page : 22 pages
File Size : 28,88 MB
Release : 1965
Category : Antennas, Horn
ISBN :
Book Description
Antenna patterns (E-plane) of an X-band horn mounted in a ground plane and covered by a plasma slab were measured. A pulsed plasma was produced by capacitor discharge in a rectangular pyrex container of 6 in. x 2 in. x 24 in. i.d. Microwave interferometer measurements of the electron density were made at 9 and 35 Gc. Antenna patterns are presented which show a sharp decrease in radiated power at certain angles corresponding to the 'optics critical angle'. Good agreement is obtained for the movement of the optics critical angle with plasma density. (Author).
On the Acoustic Basis of the Perception of Intonation by Linguists
Author : Philip Lieberman
Publisher :
Page : 26 pages
File Size : 15,48 MB
Release : 1965
Category : Intonation (Phonetics)
ISBN :
Book Description
Waveforms and Relative Phase Stability of Transients Radiated from a Helicopter-supported Antenna Wire
Author : E. A. Lewis
Publisher :
Page : 18 pages
File Size : 43,44 MB
Release : 1965
Category : Hanscom AFB (Mass.)
ISBN :
Book Description
A nearly vertical antenna wire varying in length from 3000 to 8000 ft was shock-excited by a high-voltage source. The resulting radiation fields were received at distances of about 600 km by two stations separated laterally so as to subtend an angle of about 15© at the source. The difference in wavefront arrival times at the two stations, observed for 101 transmissions, showed an average absolute deviation from the mean of about only 1/2 [mu]s. This figure includes the effects of possible source asymmetries, sferics noise, instrumental errors, and wave propagation. Typical oscillograms of antenna currents and radiation fields are given. It is shown that the amplitudes and durations of the pulse envelopes, the amplitudes and durations of the first half-cycles, and the quasi-frequencies of the pulses are in good agreement with a theory that takes energy losses into account.
Phonon Generation by Stripe-domain Resonance in Permalloy Films
Author : Marden H. Seavey
Publisher :
Page : 14 pages
File Size : 10,60 MB
Release : 1965
Category : Acoustic paramagnetic resonance
ISBN :
