Documentation of AIR2D, a computer program to simulate two-dimensional axisymmetric air flow in the unsaturated zone

1997 ◽  
Author(s):  
C.J. Joss ◽  
A.L. Baehr
Keyword(s):  
Computer Program ◽  
Unsaturated Zone ◽  
Air Flow ◽  
Two Dimensional

Structures and crystallization of vacuum-deposited amorphous Se and Sb films

1990 ◽  
Vol 48 (4) ◽  
pp. 140-141
Author(s):  
Makoto Shiojiri ◽  
Toshiyuki Isshiki ◽  
Tetsuya Fudaba ◽  
Yoshihiro Hirota
Keyword(s):  
Monte Carlo ◽  
Electron Microscope ◽  
Monte Carlo Method ◽  
Computer Program ◽  
Radial Distribution ◽  
Film Formation ◽  
Amorphous State ◽  
Two Dimensional ◽  
Amorphous Films ◽  
Binding Condition

In hexagonal Se crystal each atom is covalently bound to two others to form an endless spiral chain, and in Sb crystal each atom to three others to form an extended puckered sheet. Such chains and sheets may be regarded as one- and two- dimensional molecules, respectively. In this paper we investigate the structures in amorphous state of these elements and the crystallization.HRTEM and ED images of vacuum-deposited amorphous Se and Sb films were taken with a JEM-200CX electron microscope (Cs=1.2 mm). The structure models of amorphous films were constructed on a computer by Monte Carlo method. Generated atoms were subsequently deposited on a space of 2 nm×2 nm as they fulfiled the binding condition, to form a film 5 nm thick (Fig. 1a-1c). An improvement on a previous computer program has been made as to realize the actual film formation. Radial distribution fuction (RDF) curves, ED intensities and HRTEM images for the constructed structure models were calculated, and compared with the observed ones.

Computer analysis of two-dimensional gels: semi-automatic matching.

1982 ◽  
Vol 28 (4) ◽  
pp. 867-875 ◽  
Author(s):  
M J Miller ◽  
P K Vo ◽  
C Nielsen ◽  
E P Geiduschek ◽  
N H Xuong
Keyword(s):  
Computer Program ◽  
Quantitative Data ◽  
Computer Graphic ◽  
Automatic Method ◽  
Two Dimensional ◽  
Program System ◽  
Graphic Display ◽  
Set Up ◽  
Automatic Matching ◽  
Editing Process

Abstract We describe a computer program system for finding, quantitating, and matching the protein spots resolved on a two-dimensional electropherogram. The programs that locate and quantitate the incorporation of radioactivity into individual spots are totally automatic, as are the programs for matching protein spots between two exposures of the same gel. A semi-automatic method is used to match protein spots between different gels. This procedure is quite fast with the use of a computer-graphic display, which is also helpful in the editing process. A data base is set up and programs have been written to correlate matched protein spots from multi-gel experiments and to efficiently plot out quantitative data from sequences of equivalent spots from many gels or even many multi-gel experiments. The practical use of this system is discussed.

Design Parameters for the Housing of Two-Dimensional Air Flow Sensors

2018 ◽  
Vol 18 (24) ◽  
pp. 10154-10162 ◽  
Author(s):  
Reiner Jedermann ◽  
Nico Hartgenbusch ◽  
Mykhailo Borysov ◽  
Walter Lang
Keyword(s):  
Air Flow ◽  
Design Parameters ◽  
Two Dimensional ◽  
Flow Sensors

On the Computation of Emissions From Exhaust Gas Composition Measurements

1989 ◽  
Vol 111 (3) ◽  
pp. 410-423 ◽  
Author(s):  
J. Myers ◽  
M. Myers ◽  
P. Myers
Keyword(s):  
Computer Program ◽  
Flow Rate ◽  
Measurement Errors ◽  
Air Flow ◽  
Exhaust Gas ◽  
Emission Rates ◽  
Gas Composition ◽  
Air Flow Rate ◽  
Method Of Calculation ◽  
Calculation Technique

This paper presents a calculation technique and related computer program to yield mass emission rates from measured exhaust gas composition and fuel flow rate or fuel plus air flow rate (if air flow rate is measured). The sensitivity of the computed emission rates to (1) the method of calculation and (2) experimental measurement errors is investigated. It is recommended that published emission rates be the average of the rates computed by several different methods, as discussed in this paper, to minimize the effect of experimental variations in measurement. This, plus use of the computer program presented, would standardize the assumptions used in computing emissions and minimize differences in reported emission rates from different laboratories.

Elastic Stresses in Layered Snow Packs

1972 ◽  
Vol 11 (63) ◽  
pp. 407-414 ◽  
Author(s):  
F. W. Smith
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Computer Program ◽  
Elastic Stress ◽  
Two Dimensional ◽  
Strength Data ◽  
Elastic Stresses ◽  
Stress Levels ◽  
Dimensional Finite Element

Abstract A two-dimensional finite element computer program has been used to compute the elastic stress distribution in realistic multi-layered snow packs. Computations have been done on three-layered and five-layered snow packs intended to simulate conditions on the Lift Gully at Berthoud Pass, Colorado. Calculations have been performed to determine the effect of a layer of new snow and the effect of a weak sub-layer. Stress levels were obtained which are reasonable compared with available snow strength data.

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