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[Letter from Julie Abel to D. Jack Davis and R. William McCarter, August 13, 1997]
A letter from Julie Abel to D. Jack Davis and R. William McCarter about informing Davis and McCarter of their approved two grants to the North Texas Institute for Educators on the Visual Arts from The Getty Center for Education on the Arts.
Date:
August 31, 1997
Creator:
Abel, Julie
Object Type:
Letter
System:
The UNT Digital Library
Forest Landscape Dynamics: a Semi-Markov Modeling Approach
A transition model (MOSAIC) is used to describe forest dynamics at the landscape scale. The model uses a semi-Markov framework by considering transition probabilities and Erlang distributed holding times in each transition. Parameters for the transition model are derived from a gap model (ZELIG). This procedure ensures conceptual consistency of the landscape model with the fine scale ecological detail represented by the forest gap model. Spatial heterogeneity in the transition model is driven by maps of terrain with characteristics contained in a Geographic Information System (GIS) database. The results of the transition model simulations, percent cover forest type maps, are exported to grid-maps in the GIS. These cover type maps can be classified and used to describe forest dynamics using landscape statistics metrics. The linkage model-GIS enhances the transition model spatial analytical capabilities. A parameterization algorithm was developed that takes as input gap model tracer files which contain the percent occupation of each cover type through time. As output, the algorithm produces a file that contains the parameter values needed for MOSAIC for each one of the possible transitions. Parameters for the holding time distribution were found by calculating an empirical estimate of the cumulative probability function and using a …
Date:
August 1997
Creator:
Ablan, Magdiel
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
TWRS technical baseline database manager definition document
This document serves as a guide for using the TWRS Technical Baseline Database Management Systems Engineering (SE) support tool in performing SE activities for the Tank Waste Remediation System (TWRS). This document will provide a consistent interpretation of the relationships between the TWRS Technical Baseline Database Management software and the present TWRS SE practices. The Database Manager currently utilized is the RDD-1000 System manufactured by the Ascent Logic Corporation. In other documents, the term RDD-1000 may be used interchangeably with TWRS Technical Baseline Database Manager.
Date:
August 13, 1997
Creator:
Acree, C. D.
Object Type:
Report
System:
The UNT Digital Library
Lagrangian with off-shell vertices and field redefinitions
Meson exchange diagrams following from a lagrangian with off-shell meson-nucleon couplings are compared with those generated from conventional dynamics. The off-shell interactions can be transformed away with the help of a nucleon field redefinition. Contributions to the NN- and 3N-potentials and nonminimal contact e.m. meson-exchange currents are discussed, mostly for an important case of scalar meson exchange.
Date:
August 1, 1997
Creator:
Adam, J.; Gross, Franz & Orden, J.W. Van
Object Type:
Article
System:
The UNT Digital Library
Coherent structures in compressible free-shear-layer flows
Large scale coherent structures are intrinsic fluid mechanical characteristics of all free-shear flows, from incompressible to compressible, and laminar to fully turbulent. These quasi-periodic fluid structures, eddies of size comparable to the thickness of the shear layer, dominate the mixing process at the free-shear interface. As a result, large scale coherent structures greatly influence the operation and efficiency of many important commercial and defense technologies. Large scale coherent structures have been studied here in a research program that combines a synergistic blend of experiment, direct numerical simulation, and analysis. This report summarizes the work completed for this Sandia Laboratory-Directed Research and Development (LDRD) project.
Date:
August 1, 1997
Creator:
Aeschliman, D. P.; Baty, R. S.; Kennedy, C. A. & Chen, J. H.
Object Type:
Report
System:
The UNT Digital Library
Muscular Differences Between Female Power and Endurance Athletes
The purpose of this study was to compare the torque generating capabilities and fatigue responses of female power athletes, female endurance athletes, and age-matched female non-athletic controls.
Date:
August 1997
Creator:
Akers, Allen (Roy Allen)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Mail Order Music: the Hinners Organ Company in the Dakotas, 1879-1936
Founded in 1879 by John L. Hinners, the Hinners Organ Company developed a number of stock models of small mechanical-action instruments that were advertised throughout the Midwest. Operating without outside salesmen, the company was one of the first to conduct all of its affairs by mail, including the financial arrangements, selection of the basic design, and custom alterations where required. Buyers first met a company representative when he arrived by train to set up the crated instrument that had been shipped ahead of him. Tracker organs with hand-operated bellows were easily repaired by local craftsmen, and were suited to an area that, for the most part, lacked electricity. In all, the company constructed nearly three thousand pipe organs during its sixty years of operation. Rapid decline of the firm began in the decade prior to 1936 during which the company sold fewer than one hundred instruments, and closed in that year when John's son Arthur found himself without sufficient financial resources to weather the lengthy depression. The studies of the original-condition Hinners organs in the Dakotas include extensive photographs and measurements, and provide an excellent cross section of the smaller instruments produced by the company. They are loud, excellently crafted, …
Date:
August 1997
Creator:
Alcorn-Oppedahl, Allison A. (Allison Ann)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Boerne Star (Boerne, Tex.), Vol. 93, No. 61, Ed. 1 Friday, August 1, 1997
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
August 1, 1997
Creator:
Aldridge, Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 93, No. 62, Ed. 1 Tuesday, August 5, 1997
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
August 5, 1997
Creator:
Aldridge, Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 93, No. 63, Ed. 1 Friday, August 8, 1997
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
August 8, 1997
Creator:
Aldridge, Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 93, No. 64, Ed. 1 Tuesday, August 12, 1997
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
August 12, 1997
Creator:
Aldridge, Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 93, No. 65, Ed. 1 Friday, August 15, 1997
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
August 15, 1997
Creator:
Aldridge, Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 93, No. 66, Ed. 1 Tuesday, August 19, 1997
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
August 19, 1997
Creator:
Aldridge, Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 93, No. 67, Ed. 1 Friday, August 22, 1997
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
August 22, 1997
Creator:
Aldridge, Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 93, No. 68, Ed. 1 Tuesday, August 26, 1997
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
August 26, 1997
Creator:
Aldridge, Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 93, No. 69, Ed. 1 Friday, August 29, 1997
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
August 29, 1997
Creator:
Aldridge, Leon
Object Type:
Newspaper
System:
The Portal to Texas History
Systematics of the Stonefly Tribe Suwalliini Surdick and Behavioral Studies of Selected Species in the Stonefly Families Chloroperlidae and Perlidae
The purpose of this study is to revise the genus Suwallia and to evaluate the potential taxonomic importance of adeagal and other genitalic characters, adult pigment patterns and egg characters. The revision concentrates on western North American species while providing coverage of all species, except Suwallia asiatica Zhiltzova and Lavanidova where only presumed females have been available for study. Communication and mate locating behaviors in adult stoneflies are critical for life cycle completion and species perpetuation. Drumming signals are known for numerous species of Plecoptera, but mate searching patterns and specifically, if or how vibrational communication is utilized for locating mates are virtually unknown for all stonefly species. I conducted field or laboratory studies of three species to elucidate mate searching patterns and how vibrational communication is used for locating mates. The species studied included a bushtopper, Suwallia pallidula (Banks); a ground scrambler, Claassenia sabulosa (Banks); and treetopper, Perlinella drymo (Newman). The "fly-tremulate-search". "rock to rock" and "fly-drum-search" search patterns exhibited by these species are described, as well as how vibrational communication is used for mate finding. Vibrational signal production by tremulation is reported for the first time in Suwallia, and for only the second time Plecoptera.
Date:
August 1997
Creator:
Alexander, Kevin D. (Kevin Dewayne)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Oral History Interview with Harry Strawn, August 16, 1997
Access:
Use of this item is restricted to the UNT Community
Transcript of an interview with Harry C. Strawn, Army Air Forces veteran (31st Fighter Group, 12th Air Force; and 413th Fighter Group, 14th Air Force), concerning his experiences as a fighter pilot in the European, Mediterranean, and Pacific Theaters during World War II. Appendix includes the introduction to "In a now forgotten sky: the 31st fighter group in WW2" by Dennis C. Kucera.
Date:
August 16, 1997
Creator:
Alexander, William J. & Strawn, Harry C., 1918-
Object Type:
Book
System:
The UNT Digital Library
Comparison of Titles VI & VII of the Civil Rights Act of 1964; Americans with Disabilities Act; Age Discrimination in Employment Act; Title IX of Education Amendments of 1972; and Rehabilitation Act of 1973
None
Date:
August 6, 1997
Creator:
Allman, Alane; Mander, Andre; Schmerling, Michael; Skolnik, Cary & Greely, Kevin
Object Type:
Report
System:
The UNT Digital Library
Microwave dissolution of plant tissue and the subsequent determination of trace lanthanide and actinide elements by inductively coupled plasma-mass spectrometry
Recently there has been much concern with the ability of plants to uptake heavy metals from their surroundings. With the development of instrumental techniques with low detection limits such as inductively coupled plasma-mass spectrometry (ICP-MS), attention is shifting toward achieving faster and more elegant ways of oxidizing the organic material inherent in environmental samples. Closed-vessel microwave dissolution was compared with conventional methods for the determination of concentrations of cerium, samarium, europium, terbium, uranium and thorium in a series of samples from the National Institute of Standards and Technology and from fields in Idaho. The ICP-MS technique exhibited detection limits in parts-per-trillion and linear calibration plots over three orders of magnitude for the elements under study. The results obtained by using nitric acid and hydrogen peroxide in a microwave digestion system for the analysis of reference materials showed close agreement with the accepted values. These values were compared with results obtained from dry- and wet-ashing procedures. The findings from an experiment comparing radiometric techniques for the determination of actinide elements to ICP-MS are reported.
Date:
August 1, 1997
Creator:
Alvarado, J. S.; Neal, T. J.; Smith, L. L. & Erickson, M. D.
Object Type:
Report
System:
The UNT Digital Library
The Newsletter of the Texas Chapter of the American Fisheries Society, Volume 23, Number 3, Fall 1997
Newsletter of the Texas Chapter of the American Fisheries Society containing information about the organization, membership, and field of aquaculture and ecosystem management.
Date:
August 1997
Creator:
American Fisheries Society. Texas Chapter.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Analysis driven mechanical redesign
This paper documents an effort to use a constrained nonlinear optimization package (OptdesX) to drive a feature-based mechanical design system (Pro/Engineer) in an optimization loop. Optimizations performed in this manner can maximally respect the design intent built into the model, and eliminate the need to propagate optimization results back to design, a flaw of most current optimization systems. A prototype system was built to demonstrate the capability; use of the prototype uncovered a variety of issues that should be addressed to productionize this kind of capability.
Date:
August 1, 1997
Creator:
Ames, A. L. & Robison, R. H.
Object Type:
Report
System:
The UNT Digital Library
The VirtualwindoW for nuclear applications
Throughout the Department of Energy (DOE) complex there are numerous facilities which were constructed to research and develop nuclear materials during the cold war era. As a result, there are now many facilities such as reactors which require dismantlement and clean up. Technological advances over the past 10 years have significantly increased the state of computers, electronics and automated machinery. Because of this rapid growth, the technology of robotics has played a key role in clean up and remote operations. While robotic systems which perform hazardous tasks are being advanced, the human interface has not. Only within the past few years has the human/machine interface been addressed. A growing concern with the rapid advances in technology is that the robotic systems will become so complex that operators will be overwhelmed by the complexity and number of controls. Thus there is an on going effort within the remote and teleoperated robotic field to develop better man-machine interfaces. The Department of Energy`s Idaho National Engineering Laboratory (INEL) has been researching methods to simplify this interface including telepresence techniques which are applicable to nuclear environments. Initial telepresence research conducted at the INEL developed a concept called the VirtualwindoW. This system minimizes the complexity …
Date:
August 1, 1997
Creator:
Anderson, M.O.; McKay, M.D. & Willis, W.D.
Object Type:
Article
System:
The UNT Digital Library
Stratigraphy of the unsaturated zone and the Snake River Plain aquifer at and near the Idaho National Engineering Laboratory, Idaho
The unsaturated zone and the Snake River Plain aquifer at and near the Idaho National Engineering Laboratory (INEL) are made up of at least 178 basalt-flow groups, 103 sedimentary interbeds, 6 andesite-flow groups, and 4 rhyolite domes. Stratigraphic units identified in 333 wells in this 890-mile{sup 2} area include 121 basalt-flow groups, 102 sedimentary interbeds, 6 andesite-flow groups, and 1 rhyolite dome. Stratigraphic units were identified and correlated using the data from numerous outcrops and 26 continuous cores and 328 natural-gamma logs available in December 1993. Basalt flows make up about 85% of the volume of deposits underlying the area.
Date:
August 1, 1997
Creator:
Anderson, S.R. & Liszewski, M.J.
Object Type:
Report
System:
The UNT Digital Library