scholarly journals Computer Simulation of Reading: A Progress Report

1974 ◽  
Vol 6 (2) ◽  
pp. 131-141 ◽  
Author(s):  
Donald A. Leton
Keyword(s):  
Computer Simulation ◽  
Computer Program ◽  
First Grade ◽  
Progress Report ◽  
English Orthography ◽  
Conditional Association ◽  
The Matrix ◽  
Association Matrix

Simuread is a computer program which segments traditional English orthography into minimum graphic signals and designates a segmental phoneme, non phoneme, or phoneme combination for each. The segmental phoneme chains required for the oral representation of the orthography are simulated in numeric output. The program also derives a conditional association matrix. The rows of the matrix are the minimum graphic signals and the columns are the phoneme designates. The row totals and the percentages of specific graphic-phoneme associations are computed for the cells of the matrix. Samples of Simuread processing of various texts, a portion of a conditional association matrix and comparisons of the total occurrences of the graphic units in several first grade readers are presented in this article to illustrate its research applications.

Estimation of the Reliability of Composite Tests by a Computer Simulation Method

1969 ◽  
Vol 24 (1) ◽  
pp. 115-122 ◽  
Author(s):  
Donald W. Zimmerman
Keyword(s):  
Computer Simulation ◽  
Computer Program ◽  
General Formula ◽  
Test Scores ◽  
Random Variables ◽  
Simulation Method ◽  
Test Reliability ◽  
Computer Simulation Method ◽  
The Matrix ◽  
Made In

A computer program simulated variability in test scores by generating the values of random variables, Xij, each having possible values 1 and 0 with probability pij and 1 — pij, where the subscript i refers to items and the subscript j to persons. A matrix of pij values was considered to be a representation of a given test. Reliability was interpreted as a measure of the consistency of Xij values over replications of the procedure and was expressed as a function of expectations and variances of the pij values in any matrix. Reliability formulas such as the KR 20 and KR 21 were interpreted as cases to which the general formula reduces when restrictions are placed on the rows and columns of the matrix. Beginning with selected arrays of pij values, none of which met conditions for all the formulas, the program found estimates of reliability from the Xij values which were generated. The procedure gave an indication of the bias and the efficiency of the estimates when there are departures from assumptions made in derivation of the formulas.

Computer simulation to evaluate the economics of landfill gas recovery

1998 ◽  
Vol 38 (2) ◽  
pp. 201-208
Author(s):  
M. W. Milke
Keyword(s):  
Computer Simulation ◽  
Computer Program ◽  
Landfill Gas ◽  
Base Case ◽  
Simulation Tool ◽  
Hypothetical Case ◽  
Gas Recovery ◽  
Fixed Set ◽  
Key Variables ◽  
Simulation Results

A need exists for tools to improve evaluations of the economics of landfill gas recovery. A computer simulation tool is presented. It uses a spreadsheet computer program to calculate the economics for a fixed set of inputs, and a simulation program to consider variations in the inputs. The method calculates the methane generated each year, and estimates the costs and incomes associated with the recovery and sale of the gas. Base case results are presented for a city of 500,000. An uncertainty analysis for a hypothetical case is presented. The simulation results can help an analyst see the key variables affecting the economics of a project.

Computersimulation der Rückstreuung schneller schwerer Ionen an einkristallinen (001)-und (111̅)-Goldoberflächen / Computer Simulation of the Backscattering of High Energy Ions from (001)- and (111̅)-surfaces of Au-Single Crystals

1976 ◽  
Vol 31 (3-4) ◽  
pp. 316-326 ◽  
Author(s):  
H. Schmidt ◽  
K. Güttner
Keyword(s):  
Computer Simulation ◽  
Computer Program ◽  
Single Crystals ◽  
Grazing Incidence ◽  
High Energy ◽  
Rapid Decrease ◽  
Fcc Lattice ◽  
High Energy Ions

A computer program for following the trajectories of high energy ions in an fcc-lattice has been written to evaluate the reflection rate of high energy ions with grazing incidence to (001)- and (111̅)-Au-surfaces. The calculation yields a rapid decrease of the reflection rate for penetration directions close to low-index atomic planes. It can be shown that this result is caused by channeling of the ions between the atomic planes.

Progress Report of USC&GS Hypocenter Computer Program

1962 ◽  
Vol 33 (4) ◽  
pp. 93-96
Author(s):  
Robert H. Gunst ◽  
Eric R. Engdahl
Keyword(s):  
Computer Program ◽  
Progress Report

Computer Program GALS

1971 ◽  
Vol 25 (2) ◽  
pp. 124-130
Author(s):  
C. D. McLellan
Keyword(s):  
Computer Program ◽  
Standard Error ◽  
Electronic Computer ◽  
Error Ellipse ◽  
Diagonal Band ◽  
The Matrix ◽  
Control Survey ◽  
Core Storage ◽  
Space Requirements ◽  
Matrix Band

GALS, an acronym for Geographic Adjustment by Least Squares, is a comprehensive electronic computer program for adjusting horizontal control survey networks of triangulation, trilateration, traverse or any combination thereof. Adjustment is by variation of geographic coordinates using observation equations. Input includes coordinates, fixed or preliminary, for all points, and observed lengths, azimuths, and directions appropriately weighted; it may also include correlated position equations thus enabling the user to carry out adjustment by sections. Output includes adjusted coordinates for all points, residuals for all observations, and covariance factors for points selected by the user. Standard error ellipse data for a point or points relative to datum (fixed points) or to any other point may be printed out on request. The program can be used for network design as well as for adjustment; with the program in simulation mode a proposed survey network can be entered and standard error ellipses to analyze the configuration can be called for. As the program is in basic Fortran IV it is relatively machine independent. Space requirements in computer core storage is reduced by banding the matrix of normal coefficients into a diagonal band, a vertical band and a unit matrix band.

Pretending to Have (or to Be) a Computer as a Strategy in Teaching

1964 ◽  
Vol 34 (3) ◽  
pp. 383-401 ◽  
Author(s):  
Paul Berry
Keyword(s):  
Computer Simulation ◽  
Human Behavior ◽  
First Grade ◽  
Psychological Research ◽  
Mental Operations

Computer simulation of human behavior has become a lively area of psychological research. Taking as his example the simple counting of first grade children,the author shows how constructing a program for a real or an imaginary computer can help both the teacher and the child to understand the mental operations involved.

Particle trajectory computer program for icing analysis of axisymmetric bodies - A progress report

1987 ◽  
Author(s):  
DIMITRIOS MALTEZOS ◽  
CHARLES OSONITSCH ◽  
ROBERT SHAW ◽  
ARTHUR KAERCHER
Keyword(s):  
Computer Program ◽  
Particle Trajectory ◽  
Progress Report ◽  
Axisymmetric Bodies

Two-Ellipsoidal Inhomogeneities by the Equivalent Inclusion Method

1975 ◽  
Vol 42 (4) ◽  
pp. 847-852 ◽  
Author(s):  
Z. A. Moschovidis ◽  
T. Mura
Keyword(s):  
Computer Program ◽  
Strain Field ◽  
Applied Strain ◽  
Stress And Strain ◽  
Isotropic Matrix ◽  
Equivalent Inclusion Method ◽  
Inclusion Method ◽  
Equivalent Inclusion ◽  
The Matrix ◽  
Final Stress

The problem of two ellipsoidal inhomogeneities in an infinitely extended isotropic matrix is treated by the equivalent inclusion method. The matrix is subjected to an applied strain field in the form of a polynomial of degree M in the position coordinates xi. The final stress and strain states are calculated for two isotropic ellipsoidal inhomogeneities both in the interior and the exterior (in the matrix) by using a computer program developed. The method can be extended to more than two inhomogeneities.

scholarly journals Application of High Bypass Turbofan Computer Simulation to Flight and Test Data Processing

1982 ◽  
Author(s):  
J. F. Chapier ◽  
L. Levine
Keyword(s):  
Computer Simulation ◽  
Computer Program ◽  
Simulation Model ◽  
Gas Turbine ◽  
Data Reduction ◽  
Engine Performance ◽  
Computer Simulation Model ◽  
Test Results ◽  
Static Test ◽  
Turbine Engine

This paper describes the computer program used to compare gas turbine engine flight and static test results with a predicted standard engine computer simulation model. The program is conceived not only for a final presentation of engine performance, but also as a research tool to further analyze the validity of measurements and the assumptions used in data reduction.

scholarly journals A Computer Violation of the CHSH

2020 ◽  
Author(s):  
Han Geurdes
Keyword(s):  
Computer Simulation ◽  
Computer Program ◽  
Hidden Variables ◽  
Hidden Parameters

If a clear and valid no-go for Einsteinian hidden parameters is real, it must in no way be possible to violate the CHSH with a local hidden variables based computer simulation. In the paper we show that with the use of a modied Glauber-Sudarshan method it is possible to violate the CHSH.The criterion value comes close to the quantum value and is approximately 2.4. The proof (POC) is presented with the use of an R computer program. The important snippets of the code are discussed and the complete code is presented in an appendix.

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