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Biodiversity of Dragonflies and Damselflies (Odonata) of the South-Central Nearctic and Adjacent Neotropical Biotic Provinces (open access)

Biodiversity of Dragonflies and Damselflies (Odonata) of the South-Central Nearctic and Adjacent Neotropical Biotic Provinces

The south-central United States serves as an important biogeographical link and dispersal corridor between Nearctic and Neotropical elements of western hemisphere odonate faunas. Its species are reasonably well known because of substantial collections, but there has been no concerted effort to document the extent of biodiversity and possible geographic affinities of dragonflies and damselflies of this region. The recent discoveries of Argia leonorae Garrison, Gomphus gonzalezi Dunkle and Erpetogomphus heterodon Garrison from southern and western Texas and northern Mexico suggest that Odonata species remain to be discovered in this area, particularly from far south Texas and northern Mexico. I have documented a total of 12,515 records of Odonata found in 408 counties within the south-central U.S. A total of 73 species of damselflies and 160 species of dragonflies was revealed in the region. The 233 (197 in Texas) Odonata species are distributed among 10 families and 66 genera. Illustrated family, generic, and species-level keys are provided. Since the beginning of this work in the Fall of 1993, one species has been added each to the Louisiana and Oklahoma faunas, and 12 species have been added, previously unreported from Texas, including four new to the U.S. The area of highest Odonata …
Date: May 1999
Creator: Abbott, John C.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Effect of Presence of Support Systems and Level of Agreement on the Performance of Work Groups (open access)

The Effect of Presence of Support Systems and Level of Agreement on the Performance of Work Groups

In the study of team-based organizations most of the research has focus on the internal make-up and structure of teams. Recently there has been more interest in the effects that environment has on teams. With this new focus Support Systems in organizations have become an area of interest. Examining the perceptions of workers with respect to support systems of organizations could give insight into performance. This study specifically examines the interaction between a team's shared perception of the support in their environment and the level of support in their environment. The interaction between the two does seem to have a strong relationship with perceived performance. How do the two concepts interact, and what does this mean for organizational designers? Both questions are discussed.
Date: May 1999
Creator: Adcock, John R. (John Roger)
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Current and Future Trends in Computer Use in Elementary School Settings (open access)

Current and Future Trends in Computer Use in Elementary School Settings

The study examined current and future trends in computer use in elementary school settings. A survey instrument was developed and validated for distribution to a random sample of 200 technology coordinators in the public school districts in the state of Texas from whom 95 responses were received. The survey instrument was used to obtain information about five areas of computer use in elementary schools. These areas are: physical configurations, instructional uses, implementation issues, training and staff development, and Internet use. The study found that all public school districts that participated in the study have acquired computer hardware in their elementary schools. In addition, some other advanced computer technology components are starting to be found in elementary schools, such as teacher workstations, CD-ROM, interactive video, computer multimedia, LCD panels, and laser printers. Respondents reported that elementary school teachers in their districts have incorporated computers into their classrooms as an instructional tool and many changes have occurred in teachers’ teaching styles due to computers. However, there are some problems that hinder the effective use of computers. The major problem is lack of training. A high percentage of respondents, 81.3%, indicated that the majority of their elementary school teachers had completed less than …
Date: August 1999
Creator: Al-Awidi, Hamed M.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
A Computer-Based Process Control System for a Target Station in a LINAC Facility (open access)

A Computer-Based Process Control System for a Target Station in a LINAC Facility

An event-driven, sequential, process control system was designed for International Isotopes, Inc., to automate and remotely control a target station at the company's linear accelerator facility. The designed system consisted of two major sections: a software program (virtual instrument), which was developed by LabVIEW, and a hardware interface (FieldPoint Modular Distributed I/O System by National Instrument), which had to be a pre-developed system that did not require customization. The designed virtual instrument was tested on a simulation model that mimed the target station. The result was a valid design.
Date: May 1999
Creator: Al-Shantaf, Abdulraouf O.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Teacher Implementation of a Pretreatment Assessment Procedure in a Public Middle School (open access)

Teacher Implementation of a Pretreatment Assessment Procedure in a Public Middle School

In an attempt to determine the effectiveness of a pretreatment assessment procedure known as the scatter plot (Touchette, MacDonald, & Langer, 1985), direct observational data was collected by 13 middle school teachers on four "problem" students. After four weeks of data collection, interobserver agreement probes were calculated and a visual analysis of the plotted data was performed to ascertain a possible pattern of problem behavior. Additionally, in an attempt to assess the teachers' perceptions of the scatter plot, the 13 teachers were asked to complete a questionnaire. Although a visual analysis of the plotted data suggested a possible pattern of problem behavior, interobserver agreement probes failed to achieve a desired overall reliability of 90% or higher. Despite a low IOA, results of the questionnaire administered to the 13 teachers generally supported the use of the scatter plot as a means of assessing student behavior. Possible reasons for failing to attain an IOA of 90% or higher include the total number of students in a class, the number of subjects observed per period, the teacher's location in the classroom, and the subjects ability to recognize if the teacher was "looking." Recommendations are provided regarding future research concerning the scatter plot and …
Date: May 1999
Creator: Alcala, Angelo L. (Angelo Lee)
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Power Politics of Hells Canyon (open access)

The Power Politics of Hells Canyon

This study examines the controversy regarding Hells Canyon on the Snake River, North America's deepest gorge. Throughout the 1950s, federal and private electric power proponents wrangled over who would harness the canyon's potential for generating hydroelectricity. After a decade of debate, the privately-owned Idaho Power Company won the right to build three small dams in the canyon versus one large public power structure. The thesis concludes that private development of Hells Canyon led to incomplete resource development. Further, support of private development led to extensive Republican electoral losses in the Pacific Northwest during the 1950s.
Date: August 1999
Creator: Alford, John Matthew
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Southwest Retort, Volume 51, Number [4], January 1998 (open access)

Southwest Retort, Volume 51, Number [4], January 1998

This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date: January 1999
Creator: American Chemical Society. Dallas/Fort Worth Section.
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
Southwest Retort, Volume 51, Number [5], February 1999 (open access)

Southwest Retort, Volume 51, Number [5], February 1999

This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date: February 1999
Creator: American Chemical Society. Dallas/Fort Worth Section.
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
Southwest Retort, Volume 51, Number [6], March 1999 (open access)

Southwest Retort, Volume 51, Number [6], March 1999

This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date: March 1999
Creator: American Chemical Society. Dallas/Fort Worth Section.
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
Southwest Retort, Volume 51, Number [7], April 1999 (open access)

Southwest Retort, Volume 51, Number [7], April 1999

This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date: April 1999
Creator: American Chemical Society. Dallas/Fort Worth Section.
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
Southwest Retort, Volume 51, Number [8], May 1999 (open access)

Southwest Retort, Volume 51, Number [8], May 1999

This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date: May 1999
Creator: American Chemical Society. Dallas/Fort Worth Section.
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
Southwest Retort, Volume [52], Number 1, September 1999 (open access)

Southwest Retort, Volume [52], Number 1, September 1999

This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date: September 1999
Creator: American Chemical Society. Dallas/Fort Worth Section.
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
Southwest Retort, Volume [52], Number 2, October 1999 (open access)

Southwest Retort, Volume [52], Number 2, October 1999

This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date: October 1999
Creator: American Chemical Society. Dallas/Fort Worth Section.
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
Southwest Retort, Volume 52, Number 3, November 1999 (open access)

Southwest Retort, Volume 52, Number 3, November 1999

This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date: November 1999
Creator: American Chemical Society. Dallas/Fort Worth Section.
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
Southwest Retort, Volume 52, Number 4, December 1999 (open access)

Southwest Retort, Volume 52, Number 4, December 1999

This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date: December 1999
Creator: American Chemical Society. Dallas/Fort Worth Section.
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
Chemical Information Bulletin, Volume 51, Number 1, Spring 1999 (open access)

Chemical Information Bulletin, Volume 51, Number 1, Spring 1999

Periodic supplement for "the regular journals of the American Chemical Society," containing annotated bibliographies of chemical documentation literature as well as information about meetings, conferences, awards, scholarships, and other news from the American Chemical Society (ACS) Division of Chemical Literature.
Date: Spring 1999
Creator: American Chemical Society. Division of Chemical Information.
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
Chemical Information Bulletin, Volume 51, Number 2, Fall 1999 (open access)

Chemical Information Bulletin, Volume 51, Number 2, Fall 1999

Periodic supplement for "the regular journals of the American Chemical Society," containing annotated bibliographies of chemical documentation literature as well as information about meetings, conferences, awards, scholarships, and other news from the American Chemical Society (ACS) Division of Chemical Literature.
Date: Autumn 1999
Creator: American Chemical Society. Division of Chemical Information.
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
Letter to the Editor: Review of Parting Visions (open access)

Letter to the Editor: Review of Parting Visions

Letter from Thomas A. Angerpointner to the editor of the Journal of Near-Death Studies on the topic "Review of Parting Visions."
Date: Autumn 1999
Creator: Angerpointner, Thomas A.
Object Type: Letter
System: The UNT Digital Library

Development of a Coaxiality Indicator

Access: Use of this item is restricted to the UNT Community
The geometric dimensioning and tolerancing concept of coaxiality is often required by design engineers for balance of rotating parts and precision mating parts. In current practice, it is difficult for manufacturers to measure coaxiality quickly and inexpensively. This study examines feasibility of a manually-operated, mechanical device combined with formulae to indicate coaxiality of a test specimen. The author designs, fabricates, and tests the system for measuring coaxiality of holes machined in a steel test piece. Gage Repeatability and Reproducibility (gage R&R) and univariate analysis of variance is performed in accordance with Measurement System Analysis published by AIAG. Results indicate significant design flaws exist in the current configuration of the device; observed values vary greatly with operator technique. Suggestions for device improvements conclude the research.
Date: December 1999
Creator: Arendsee, Wayne C.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Theory of Essence. [Part] 3: Neuroanatomical and Neurophysiological Aspects of Interactionism (open access)

The Theory of Essence. [Part] 3: Neuroanatomical and Neurophysiological Aspects of Interactionism

Article continuing the construction of a dualistic interactionist theory of the near-death experience (NDE), the theory of essence, which was begun in two previous articles. The present work represents an extension of the theory to the microscopic level of analysis, in order to specify in detail the mechanism of essence-brain interaction and to address some general and specific objections to interactionism and the theory of essence.
Date: Winter 1999
Creator: Arnette, J. Kenneth
Object Type: Article
System: The UNT Digital Library
Examining the Nature of Interactions which Facilitate Learning and Impact Reading Achievement During a Reading Apprenticeship: A Case Study of At-risk Adolescent Readers (open access)

Examining the Nature of Interactions which Facilitate Learning and Impact Reading Achievement During a Reading Apprenticeship: A Case Study of At-risk Adolescent Readers

The purpose of this qualitative case study was to explore the interactions that take place during a reading apprenticeship which facilitate the learning of reading strategies by adolescent students who are at the middle school level and are still at-risk for reading failure and to investigate how a reading apprenticeship affects reading achievement in the areas of fluency, vocabulary development, comprehension, and the self-perception of the reader. The case study was descriptive and interpretive in nature, and examined two students, each of whom was part of a one-to-one reading apprenticeship. The researcher served as participant observer in both cases and was the teacher in each of the one-to-one reading apprenticeships. The primary data set was qualitative in nature, and elements of quantitative data were also considered. Sessions included pretesting and posttesting using the Classroom Assessment of Reading Processes (Swearingen & Allen, 1997), reading from narrative or expository books, working with words, writing, and dialoguing about the reading. Reading strategies were directly taught, modeled, and reinforced by the teacher/researcher with the goal of the students internalizing the strategies and improving their reading in the areas of fluency, vocabulary development, and comprehension, as well as improving their attitudes toward reading and their …
Date: December 1999
Creator: Arthur, Mary L.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
JAC: A Journal of Composition Theory, Volume 19, Number 1, 1999 (open access)

JAC: A Journal of Composition Theory, Volume 19, Number 1, 1999

JAC: A Journal of Composition Theory contains a collection of papers regarding writing and rhetoric: "The JAC is a forum for theory, research and pedagogy regarding (1) those writing courses beyond the freshman courses, excluding technical and creative writing, (2) writing in courses which are not themselves writing courses, particularly in the liberal arts and sciences, and (3) work in theory, research or pedagogy which is advanced or progressive and will shed light on the field as a whole while at the same time providing insights for advanced composition" (volume 1, number 1).
Date: 1999
Creator: Association of Teachers of Advanced Composition (U.S.)
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
JAC: A Journal of Composition Theory, Volume 19, Number 2, 1999 (open access)

JAC: A Journal of Composition Theory, Volume 19, Number 2, 1999

JAC: A Journal of Composition Theory contains a collection of papers regarding writing and rhetoric: "The JAC is a forum for theory, research and pedagogy regarding (1) those writing courses beyond the freshman courses, excluding technical and creative writing, (2) writing in courses which are not themselves writing courses, particularly in the liberal arts and sciences, and (3) work in theory, research or pedagogy which is advanced or progressive and will shed light on the field as a whole while at the same time providing insights for advanced composition" (volume 1, number 1).
Date: 1999
Creator: Association of Teachers of Advanced Composition (U.S.)
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
JAC: A Journal of Composition Theory, Volume 19, Number 3, 1999 (open access)

JAC: A Journal of Composition Theory, Volume 19, Number 3, 1999

JAC: A Journal of Composition Theory contains a collection of papers regarding writing and rhetoric: "The JAC is a forum for theory, research and pedagogy regarding (1) those writing courses beyond the freshman courses, excluding technical and creative writing, (2) writing in courses which are not themselves writing courses, particularly in the liberal arts and sciences, and (3) work in theory, research or pedagogy which is advanced or progressive and will shed light on the field as a whole while at the same time providing insights for advanced composition" (volume 1, number 1).
Date: 1999
Creator: Association of Teachers of Advanced Composition (U.S.)
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library