Computer Measurement of Line Strengths with Application to the Methane Spectrum

1983 ◽  
Vol 37 (3) ◽  
pp. 287-292 ◽  
Author(s):  
Linda R. Brown ◽  
Jack S. Margolis ◽  
Robert H. Norton ◽  
Barbara D. Stedry

Computer-aided measurement of absorption line strengths from high resolution spectra greatly improves the accuracies to which relative line strengths can be determined. This article describes a computer program written for interactive use on a Prime minicomputer to fit simultaneously absorption line positions, strengths, linewidths, and continuum parameters. Application to the methane spectrum indicates that relative line strengths have been measured with accuracies of 2% or better for single isolated absorptions. Line strengths from the Q branches of the ν4 and ν1 + ν4 bands of methane are reported and compared to calculated values given in the 1980 Air Force Geophysical Laboratory (AFGL) Compilation of Molecular Parameters.

1985 ◽  
Vol 50 (11) ◽  
pp. 2480-2492 ◽  
Author(s):  
Soňa Přádná ◽  
Dušan Papoušek ◽  
Jyrki Kauppinen ◽  
Sergei P. Belov ◽  
Andrei F. Krupnov ◽  
...  

Fourier transform spectra of the ν2 band of PH3 have been remeasured with 0.0045 cm-1 resolution. Ground state combination differences from these data have been fitted simultaneously with the microwave and submillimeterwave data to determine the ground state spectroscopical parameters of PH3 including the parameters of the Δk = ± 3n interactions. The correlation between the latter parameters has been discussed from the point of view of the existence of two equivalent effective rotational operators which are related by a unitary transformation. The ΔJ = 0, +1, ΔK = 0 (A1 ↔ A2, E ↔ E) rotational transitions in the ν2 and ν4 states have been measured for the first time by using a microwave spectrometer and a radiofrequency spectrometer with acoustic detection.


1996 ◽  
Vol 59 (1-2) ◽  
pp. 41-48 ◽  
Author(s):  
Nitin Duggal ◽  
Mustafa A. Ahmetoglu ◽  
Gary L. Kinzel ◽  
Taylan Altan

2001 ◽  
Vol 374 (3) ◽  
pp. 871-877 ◽  
Author(s):  
D. Reimers ◽  
R. Baade ◽  
H.-J. Hagen ◽  
S. Lopez

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Piotr Kowalik ◽  
Edyta Wróbel

Purpose This paper aims to present the possibility of computer-aided technology of chemical metallization for the production of electrodes and resistors based on Ni-P and Ni-Cu-P layers. Design/methodology/approach Based on the calculated parameters of the process, test structures were made on an alumina substrate using the selective metallization method. Dependences of the surface resistance on the metallization time were made. These dependencies take into account the comparison of the calculations with the performed experiment. Findings The author created a convenient and easy-to-use tool for calculating basic Ni-P and Ni-Cu-P layer parameters, namely, surface resistance and temperature coefficient of resistance (TCR) of test resistor, based on chemical metallization parameters. The values are calculated for a given level of surface resistance of Ni-P and Ni-Cu-P layer and defined required range of changes of TCR of test resistor. The calculations are possible for surface resistance values in the range of 0.4 Ohm/square ÷ 2.5 Ohm/square. As a result of the experiment, surface resistances were obtained that practically coincide with the calculations made with the use of the program created by the authors. The quality of the structures made is very good. Originality/value To the best of the authors’ knowledge, the paper presents a new, unpublished method of manufacturing electrodes (resistors) on silicon, Al2O3 and low temperature co-fired ceramic substrates based on the authors developed computer program.


Author(s):  
Eleonora Bilotta ◽  
Pietro Pantano

In early 1950s, Iannis Xenakis became the first composer to use stochastic processes to generate pieces of music, working by hand. The first entirely computer-generated composition was Illiac.Suite.for.String.Quartett, realized by Lejaren Hiller in 1956 (Hiller, 1970, 1981). In Hiller’s approach, all kinds of musical processes were coded and implemented by computer. In the ‘80s, David Cope created a computer-aided system allowing anyone to create new compositions in the styles of past composers. The system worked even for users with no skills in programming or composition. Cope thought that computers could be a good tool for studying musical style, encoding it into programs to increase musical creativity. So he began to study the essential elements that define musical style, creating an explicit definition he could encode in a computer program.


Author(s):  
O.N. Ulenikov ◽  
E.S. Bekhtereva ◽  
O.V. Gromova ◽  
N.I. Raspopova ◽  
C. Sydow ◽  
...  

2001 ◽  
Vol 552 (1) ◽  
pp. L17-L21 ◽  
Author(s):  
Daniel D. Kelson ◽  
Garth D. Illingworth ◽  
Marijn Franx ◽  
Pieter G. van Dokkum

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