Author: M. OgawaPublisher:
ISBN:
Category : Absorption spectra
Languages : en
Pages : 18
Book Description
Absorption Spectrum of Electrically Excited Nitrogen Molecules in the Vacuum-uv Region
Author: M. OgawaPublisher:
ISBN:
Category : Absorption spectra
Languages : en
Pages : 18
Book Description
Absorption Spectra of the Pink and Lewis-Rayleigh Afterglows of Nitrogen in the Vacuum-uv Region
Author: Y. TanakaPublisher:
ISBN:
Category : Absorption spectra
Languages : en
Pages : 26
Book Description
Microwave Measurements of Partially Coherent Fields
Author: J. L. PoirierPublisher:
ISBN:
Category : Chickens
Languages : en
Pages : 20
Book Description
A Method for Estimating Atmospheric Noise Amplitudes and Phase Errors in Quenched High-Q Receiving Circuits
Author: E. A. LewisPublisher:
ISBN:
Category : Atmospheric electricity
Languages : en
Pages : 50
Book Description
Very narrow-band quenched filters used for studying VLF radio signals differ from conventional narrow-band circuits in that both signal and atmospheric noise impulses cause only brief quasi-sinusoidal outputs instead of a prolonged ringing. The random overlapping of these short noise and signal bursts can cause errors in phase measurements. It is shown that the distribution of phase errors can be calculated from the amplitude distribution of the output noise envelope. The properties of the phase distribution are discussed in detail, the computation required in the general case is illustrated by means of a numerical example. A simple 'time-sequential' method for experimentally obtaining typical amplitude distributions is suggested. (Author).
Infrared Lattice Vibrations of Magnesium Stannide
Author: A. KahanPublisher:
ISBN:
Category : Crystal lattices
Languages : en
Pages : 18
Book Description
Structure of 9,9,10,10-tetrachloroanthracene
Author: N. F. YannoniPublisher:
ISBN:
Category : Anthracene crystals
Languages : en
Pages : 12
Book Description
Effects of Experimental Parameters on Thermoluminescence of a Type II-a Diamond
Author: Albert D. JohnsonPublisher:
ISBN:
Category : Crystals
Languages : en
Pages : 42
Book Description
Thermoluminescence provides a method for studying properties of those crystalline imperfections which behave as electron traps and recombination centers in wide bandgap materials. This approach, however, has been used relatively little, possibly due to the fact that the shapes and intensities of thermoluminescent glow curves are functions of several experimental parameters and are often complicated by the overlapping of a number of individual glow peaks. In the present work, experimental parameters were isolated and some of their effects on thermoluminescent glow curves were analyzed. This yielded information on activation energies associated with trapping levels, the nature of the kinetics involved in electron transitions, and electron retrapping. A Type II-a diamond, which has a wide distribution of thermoluminescent glow peaks, was used in this work. (Author).
State - Logic Relations in an Iterative Structure for Autonomous Sequential Machine
Author: William F. King (III)Publisher:
ISBN:
Category : Cellular automata
Languages : en
Pages : 30
Book Description
The state-logic relations are determined in an iterative structure for any autonomous sequential machine. A model (unlike that of Mealy) is used in which delay is distributed throughout the machine. Theorems are presented which prescribe the interconnection of identical elements to realize any autonomous sequential behavior. Synthesis, as described here, yields a more costly machine in terms of delay elements than those of previous workers. In addition to the iterative structure, increased speed of operation is the advantage bought by the extra delay elements.
On Measuring the Radar Cross Sections of Ducks and Chickens
Author: P. Blacksmith (Jr.)Publisher:
ISBN:
Category : Chickens
Languages : en
Pages : 14
Book Description
Optimum Binary FSK for Transmitted Reference Systems Over Rayleigh Fading Channels
Author: Neil J. BershadPublisher:
ISBN:
Category : Decision theory
Languages : en
Pages : 32
Book Description
It is well known that in communicating over randomly time-varying channels, a receiver which performs a channel measurement can make a better decision than one that does not. It is shown that a channel-measuring system improves system performance even when the channel characteristics are fixed only during the present message interval. The randomly time-varying channel studied is that of a Rayleigh fading medium with independently fading mark and space channels whose fading is fixed over one baud interval but is independent from baud to baud. The transmission system is a modified frequency shift keying (FSK) system such that during a portion of a baud interval the mark and space frequencies are always transmitted so as to act as reference signals. For the above system, the following characteristics have been established: (a) Optimum receiver configuration, (b) Optimum ratio alpha of information energy to total signal energy as a function of total available signal-to-noise ratio for a single fading channel, (c) Asymptotic optimum alpha for an M-diversity channel, (d) Error probabilities for (b) and asymptotic error probabilities for (c) for alpha opt as a function of total signal-to-noise ratio. The asymptotic results show that by using reference techniques the order of diversity is effectively doubled. (Author).