A FORTRAN program for cluster enumeration

1982 ◽  
Vol 29 (2) ◽  
pp. 309-315 ◽  
Author(s):  
S. Redner
Keyword(s):  
Fortran Program ◽  
Cluster Enumeration

SIGMAL: A Program for Calculating L-Shell lonization Cross-Sections

1981 ◽  
Vol 39 ◽  
pp. 198-199 ◽  
Author(s):  
R.F. Egerton
Keyword(s):  
Cross Sections ◽  
Fortran Program ◽  
Absorption Data ◽  
X Ray ◽  
Atomic Electrons ◽  
Energy Dependent ◽  
Hydrogenic Model ◽  
Electron Energy Loss ◽  
X Ray Absorption ◽  
Shell Ionization

SIGMAL is a short (∼ 100-line) Fortran program designed to rapidly compute cross-sections for L-shell ionization, particularly the partial crosssections required in quantitative electron energy-loss microanalysis. The program is based on a hydrogenic model, the L1 and L23 subshells being represented by scaled Coulombic wave functions, which allows the generalized oscillator strength (GOS) to be expressed analytically. In this basic form, the model predicts too large a cross-section at energies near to the ionization edge (see Fig. 1), due mainly to the fact that the screening effect of the atomic electrons is assumed constant over the L-shell region. This can be remedied by applying an energy-dependent correction to the GOS or to the effective nuclear charge, resulting in much closer agreement with experimental X-ray absorption data and with more sophisticated calculations (see Fig. 1 ).

A FORTRAN PROGRAM FOR COMPUTING THE EXACT VARIANCE OF WEIGHTED KAPPA

2005 ◽  
Vol 101 (6) ◽  
pp. 468 ◽  
Author(s):  
PAUL W. MIELKE
Keyword(s):  
Weighted Kappa ◽  
Fortran Program

LOCATING ERRORS IN QUESTIONNAIRE STYLE DATA: A FORTRAN PROGRAM

1990 ◽  
Vol 71 (6) ◽  
pp. 537
Author(s):  
JOHN F. WALSH
Keyword(s):  
Fortran Program

CHEMANAL; a MULTICS Fortran program to calculate chemical weathering data

1980 ◽  
Author(s):  
Steven M. Colman
Keyword(s):  
Chemical Weathering ◽  
Fortran Program

Documentation of a FORTRAN program, 'isocomp', for computing isostatic residual gravity

1981 ◽  
Author(s):  
Robert C. Jachens ◽  
Carter W. Roberts
Keyword(s):  
Fortran Program ◽  
Residual Gravity

Digital Computer Analysis of Electrophoresis and Ultracentrifugation Patterns by a Sum of Gaussian-like Distributions

1975 ◽  
Vol 30 (5-6) ◽  
pp. 311-317 ◽  
Author(s):  
E Tränkle
Keyword(s):  
Distribution Function ◽  
Computer Analysis ◽  
Digital Computer ◽  
Fortran Program ◽  
Test Period ◽  
Starting Values ◽  
Overlapping Peaks ◽  
Molecular Components

Abstract Computer Analysis, Electrophoresis, Ultracentrifugation A Gaussian-like distribution function with three additional parameters is introduced which describes well the electrophoresis patterns of albumin, prealbumin and transferrin. Electrophoresis and ultracentrifugation patterns with 10-15 overlapping peaks are analyzed by means of the FORTRAN-program DIANA. One obtains the (relative) areas, positions and widths of the peaks. The analysis of a series of patterns proceeds in an automated way after the number of molecular components as well as starting values of the positions and the widths have been chosen in a test period.

scholarly journals Numerical Implementation of a Hydro-Mechanical Coupling Constitutive Model for Unsaturated Soil Considering the Effect of Micro-Pore Structure

2021 ◽  
Vol 11 (12) ◽  
pp. 5368
Author(s):  
Guoqing Cai ◽  
Bowen Han ◽  
Mengzi Li ◽  
Kenan Di ◽  
Yi Liu ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Mechanical Behavior ◽  
Pore Structure ◽  
Unsaturated Soil ◽  
Fortran Program ◽  
Numerical Implementation ◽  
Numerical Application ◽  
Integration Algorithm ◽  
Mechanical Coupling ◽  
Numerical Program

An unsaturated soil constitutive model considering the influence of microscopic pore structure can more accurately describe the hydraulic–mechanical behavior of unsaturated soil, but its numerical implementation is more complicated. Based on the fully implicit Euler backward integration algorithm, the ABAQUS software is used to develop the established hydro-mechanical coupling constitutive model for unsaturated soil, considering the influence of micro-pore structure, and a new User-defined Material Mechanical Behavior (UMAT) subroutine is established to realize the numerical application of the proposed model. The developed numerical program is used to simulate the drying/wetting cycle process of the standard triaxial specimen. The simulation results are basically consistent with those calculated by the Fortran program, which verifies the rationality of the developed numerical program.

A FORTRAN PROGRAM, ‘SIGMPLOT’, FOR FITTING SIGMOID CURVES TO THRESHOLD DATA AND FOR PLOTTING THE RESULT

1975 ◽  
Vol 1 (4) ◽  
pp. 519-531 ◽  
Author(s):  
BIRGER DRAKE
Keyword(s):  
Fortran Program ◽  
Threshold Data
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