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3DTOM, Three-Dimensional Geophysical Tomography

Description: Abstract: 3DTOM is a DOS-compatible computer program developed by the Mines U.S. Bureau of for three-dimensional tomographic imaging of the subsurface at mine sites. The program uses the simultaneous iterative reconstruction technique (SIRT) to invert travel- time data and produce maps of wave velocity, or to invert amplitude data and generate maps of wave attenuation coefficients. Either seismic (compressional and/or shear) or electromagnetic (e.g., radio or radar) wave data may be used. Ray tracing in 3DTOM uses several different methods, including ray bending, network theory, and a combination of these. User-defined constraints are important in reducing the mathematical nonuniqueness of inversions based on limited data. 3DTOM permits the use of hard constraints, or soft constraints based on fuzzy logic, to allow for uncertainty in the constraints. Reliable subsurface images are useful in many different mine-related problems, including void detection, fracture detection, fluid monitoring, and qualitative stress evaluation.
Date: 1996
Creator: Jackson, Michael J. & Tweeton, Daryl R.
Partner: UNT Libraries Government Documents Department

Kxp and kxpl : a Busy Man's LaTeX

Description: This report introduces the following programs: kxp: a time-saving LaTeX preprocessor, kxpl: kxp plus latex, kxh: a help facility for kxp and LaTex, ptex: a program for printing a LaTeX document, and pptex: a program for printing parts of a LaTeX document. More detailed descriptions will be given in Part 2: A Reference Manual. The appendix gives instructions on how to use Argonne's Mathematics and Computer Science Division letterhead and intralaboratory memo L(sup A)T(sub E)X styles.
Date: March 1991
Creator: Kwong, Man Kam
Partner: UNT Libraries Government Documents Department

IBM Problem M Curves

Description: Abstract: Presented here are working graphs of pressure, density, velocity, and temperature from the Los Alamos Scientific Laboratory calculations (IBM Problem M) of a spherically symmetric explosion in a homogeneous atmosphere.
Date: June 29, 1960
Creator: Broyles, C. D.
Partner: UNT Libraries Government Documents Department

Comparative Analysis Of 105 Higher Education Doctoral Programs In The United States

Description: The mission types of 105 current doctoral programs in higher education and the extent to which their missions have changed since a similar study was conducted by Dressel and Mayhew in 1974 was studied. The curricula offerings of these programs by degree type (e.g., Ed.D. & Ph.D.) were compared with Fife’s 1991 findings. Finally, the study examined the various modes of instruction (e.g., classroom, online, cohort, blended) these programs utilize. The population was the 131 U.S. higher education doctoral program coordinators or directors who were identified using the ASHE Higher Education Program Directory. A total of 46 hosted Ed.D. programs and 59 hosted Ph.D. programs for a combined total of 105 doctoral programs. An electronic survey, developed by utilizing an expert panel and the cognitive interviewing technique, was sent to each participant. A total of 46 hosted Ed.D. programs and 59 hosted Ph.D. programs for a combined total of 105 doctoral programs. A total of 77 institutions (59%) returned usable questionnaires, and six other universities (5%) indicated their doctoral higher education programs no longer existed. Twenty-three of the responding institutions identified with a research-focused mission; 25 institutions identified with a practitioner-based mission; and 28 institutions identified with both types of missions. Pearson r correlation analysis revealed no statistically significant relationship between degree type and course offerings (r = .123, p = .05). However, ? 2 revealed that, compared to Ed.D. programs, Ph.D. programs enrolled significantly more full-time students (? 2 (3) = 14.504, p < .05). Through further analysis, a core of nine courses emerged for more than 75% of all higher education doctoral programs. Those courses are general administration of higher education, finance of higher education, legal studies, history of higher education, philosophy and theoretical foundations of higher education, teaching/learning in higher education, student affairs administration, college student research, ...
Date: December 2011
Creator: Valerin, Marcus P.
Partner: UNT Libraries

A Study of Safety in the Industrial Arts Laboratories in the Dallas Independent School District

Description: This is a study of the safety in the industrial arts laboratories in the Dallas Independent School System. A questionnaire was sent to each instructor of industrial arts metalworking, woodworking, electricity, and power mechanics, and included nine main areas of safety.
Date: August 1969
Creator: Morrow, Virgil R.
Partner: UNT Libraries

Preselect Address Unit for the IBM 1620 Computer

Description: From Abstract: "A device is described which permits the user to stop an IBM 1620 Computer at any preselected instruction address to aid in program debugging. Computer timing considerations are discussed and a circuit description is provided."
Date: December 1963
Creator: Frey, J. J.; Graveson, R. T. & Cassidy, M. E.
Partner: UNT Libraries Government Documents Department

A Method of Calculating Transient Temperatures in a Multiregion, Axisymmetric, Cylindrical Configuration the Argus Program, 1089/Re248, Written in Fortran II

Description: From Abstract: "A detailed description is given of ARGUS, a FORTRAN II computer program for calculating transient temperatures in any concentric cylindrical configuration. Included are an explanation of the mathematical methods, a discussion of special features and restrictions, input and output descriptions, operating instructions, several sample problems, and the code listing."
Date: November 1963
Creator: Schoeberle, D. F.; Heestand, J.; Miller, L. B. & Miller, L. B.
Partner: UNT Libraries Government Documents Department

Pictorial Studies of Molecules 1: Molecular Orbital Density Comparisons of H2, Li2, B2, C2, N2, O2, and F2

Description: From Review of Theory: " In practice, a very close approximation to the molecular orbitals can be obtained in this way. Recent calculations of this type, utilizing analysis and computer programs developed by the author, have resulted in the determination of the molecular orbitals for a large number of diatomic molecules in the form of Eq. (2). These functions, which are thought to be very close to the Hartree-Fock (i.e., the molecular orbitals demanded by theory) result, were used in the pictorial calculations presented in this report."
Date: July 1965
Creator: Wahl, Arnold C.
Partner: UNT Libraries Government Documents Department

Optimum Operation of Desalting Plants as a Supplemental Source of Safe Yield

Description: From Summary: "The Operating Rule Program receives focus in this report. It is written in Fortran IV computer language and consists of about 1,700 statements. Principles results of the application of the program are summarized in Table 1 for the three systems analyzed."
Date: April 1970
Creator: Clyde, Calvin G. & Blood, Wesley H.
Partner: UNT Libraries Government Documents Department

"SHARP" : A One-Dimensional Hydrodynamics Code for the IBM 704

Description: "The code described here was designed to handle calculations of hydrodynamic motion in one-dimensional form, including provision for the disruption of a sample by 'spallation'. The term spallation refers to the rupture of the material by tension, induced by a rarefaction wave proceeding from a free surface."
Date: April 1958
Creator: Nance, Olen; Wilkins, Mark; Blandford, Isabel & Smith, Hugh
Partner: UNT Libraries Government Documents Department

2nd Session, 108th Congress

Description: From Summary: "This report discusses significant legislative provisions in the two principal bills that are likely to be the subject of congressional discussion in the coming weeks and months to reauthorize federal highway, highway safety, and transit programs."
Date: April 5, 2004
Creator: Fischer, John W.
Partner: UNT Libraries Government Documents Department

Computer Routines for Probability Distributions, Random Numbers, and Related Functions

Description: Abstract: Use of previously coded and tested subroutines simplifies and speeds up program development and testing. This report presents routines that can be used to calculate various probability distributions and other functions of importance in statistical hydrology.
Date: 1983
Creator: Kirby, W. H.
Partner: UNT Libraries Government Documents Department