Author : Freeman D. Shepherd (Jr.)
Publisher :
Page : 98 pages
File Size : 19,31 MB
Release : 1965
Category : Energy-band theory of solids
ISBN :
Details of the energy band structure of degenerate n-type germanium were determined by analysis of fine structure in the 4.2K volt-ampere characteristic of germanium tunnel diodes. No shift in the relative energy of the conduction band minima was observed. The band edge is found to be exponentially distributed with 1/e energies of the order of 10 MeV. There appears to be an ordering mechanism among the group V impurity atoms used as substrate dopants. (Author).
Author :
Publisher :
Page : 652 pages
File Size : 15,70 MB
Release : 1994
Category : Aeronautics
ISBN :
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author : J. L. Poirier
Publisher :
Page : 20 pages
File Size : 33,26 MB
Release : 1965
Category : Chickens
ISBN :
Author : F. V. Schultz
Publisher :
Page : 14 pages
File Size : 38,19 MB
Release : 1965
Category : Boundary value problems
ISBN :
In this work, rigorous electromagnetic theory is used to determine the nose-on radar cross section of a perfectly conducting cone of finite height. The end cap of the cone is assumed to be a segment of a s spherical surface with center at the apex of the cone. Numerical results have been obtained for a cone having a total apex angle of 30 degrees and for values of [kappa alpha] ranging from 0.0259 to 5.18, where [kappa]=2 [pi]/[lambda] and [alpha] is the radius of the base of the cone. Siegel's Rayleigh method and by using Keller's modified geometrical optics as well as with experimental results obtained by Keys. The comparisons are instructive below [kappa alpha] = 3.2, the apparent upper limit of validity of the present results -- p.[3].
Author : K. U. Sivaprasad
Publisher :
Page : 34 pages
File Size : 25,13 MB
Release : 1965
Category : Magnetostatics
ISBN :
Author : Tapan K. Mukherjee
Publisher :
Page : 16 pages
File Size : 25,25 MB
Release : 1965
Category : Anions
ISBN :
Author : P. Blacksmith (Jr.)
Publisher :
Page : 14 pages
File Size : 15,30 MB
Release : 1965
Category : Chickens
ISBN :
Author : E. J. Post
Publisher :
Page : 10 pages
File Size : 40,29 MB
Release : 1965
Category : Cavity resonators
ISBN :
Author : J. K. Schindler
Publisher :
Page : 24 pages
File Size : 25,6 MB
Release : 1965
Category : Electromagnetism
ISBN :
Author : John N. Pierce
Publisher :
Page : 38 pages
File Size : 13,39 MB
Release : 1965
Category : Alphabets
ISBN :
The performance of a plurality-count diversity combiner for fading M-ary transmissions is analyzed, and calculated error probabilities are presented graphically for alphabet sizes of 2, 8, and 32. The performance is shown to be within 3 dB of that of an optimum square-law combiner for moderate alphabet sizes when there is no restriction on the allowable number of diversity branches. It is shown that a worthwhile saving in transmitted power can be effected by using nonbinary alphabets with plurality-count combining for the transmission of binary data. The availability of extra information from the combiner for use with error-correction is discussed.
