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A Multimedia Atlas of Dissection for Comparative Anatomy of the Vertebrates

Description: This interactive multimedia content is part of the thesis that was prepared for the degree of Master of Science in Biology: http://digital.library.unt.edu/ark:/67531/metadc2224. Traditional methods of teaching the laboratory course for Comparative Anatomy of the Vertebrates could be improved by applying current computer technology to construct an interactive, multimedial atlas of dissection. Five specimens used in comparative anatomy courses at most institutions were chosen as representative members of the Phylum Chordata: amphioxus, lamprey, dogfish shark, mud puppy, and cat. Specimens were dissected according to the modified method of Wischnitzer, 1993, and each stage was photographed with a Kodak DC120 digital zoom camera. These images were processed on a Power Macintosh 7600 computer with Adobe Photoshop v. 5.0. The atlas was constructed from these images using Macromedia Authorware v. 4.0.3. Each image contains a series of interactive objects that display a highlight and descriptive text as the cursor passes over each object.
Access: This item is restricted to UNT Community Members. Login required if off-campus.
Date: August 1999
Creator: Curran, Anthony A., Jr.
Partner: UNT Libraries

The Doppler Effect in Fast Neutron Reactors

Description: Report issued by the APDA over studies conducted on the Doppler Effect in fast neutron reactors. Methods and results of the studies are presented and discussed. This report includes tables, and illustrations.
Date: June 1960
Creator: Nicholson, Richard Benjamin
Partner: UNT Libraries Government Documents Department

Modelos de Simulación a Diferentes Escalas de la Dinámica del Bosque Tropical. Reserva Forestal Imataca. Sector Central.

Description: Thesis submitted to the National Experimental University of Guayana as partial requirement for the degree of Master of Science in Environmental Science. This thesis discusses simulation models at different scales of tropical forest dynamics.
Date: June 2000
Creator: Delgado, Luz A. & Acevedo, Miguel F.
Partner: UNT College of Engineering

UTSI/CFFF MHD PROGRAM COMPLETION AND RELATED ACTIVITY

Description: Maintenance work on the DOE CFFF facility and other related government property is no longer authorized under this contract in accordance with the DOE-UT Settlement Agreement. Environmental remediation preservation of the facility continued. Government property has been transferred to UTSI as owner which frees up many items for proper disposal. Actions are underway to dispose of other wastes, and control pests and water at the DOE CFFF. Only one high temperature superconductivity project is active under Task 6. Under the particular Subtask 6.02, samples of nickel obtained from Plastronics, Inc. were coated with the LAO precursor solution. These coated samples have been characterized using the x-ray diffraction unit, and the results from the x-ray diffraction characterizations were further analyzed using a statistical program to develop multi-regression coefficients. Based on these regression coefficients, the variables that have significant effect on the coating of LAO over nickel substrate have been identified. A Master of Science thesis was prepared describing these findings and it will be defended in front of the committee members during July, 2000.
Date: August 1, 2000
Partner: UNT Libraries Government Documents Department

Center for Volcanic and Tectonic Studies: 1992--1993 annual report

Description: The annual report of the Center for Volcanic Studies (CVTS) contains a series of papers, reprints and a Master of Science thesis that review the progress made by the CVTS between October 1, 1992 and February 1, 1994. During this period CVTS staff focused on several topics that have direct relevance to volcanic hazards related to the proposed high-level nuclear waste repository at Yucca Mountain, Nevada. These topics include: (1) polygenetic/polycyclic volcanism in Crater Flat, Nevada; (2) the role of the mantle during crustal extension; (3) the detailed geology of Crater Flat, Nevada; (4) Pliocene volcanoes in the Reveille Range, south-central Nevada; (5) estimating the probability of disruption of the proposed repository by volcanic eruptions. This topic is being studied by Dr. C.H. Ho at UNLV. The report contains copies of these individual papers as they were presented in various conference proceedings.
Date: December 31, 1994
Partner: UNT Libraries Government Documents Department

The Historical Development and Future of the National Technological University

Description: The National Technological University (NTU), a consortium of more than twenty American engineering schools, broadcasts courses produced at member institutions to professional engineers at corporate sites across the country. It is a nonprofit institution.begun in fall 1984 with headquarters in Fort Collins, Colorado, which offers only course work leading to the Master of Science degree in various branches of technology, or applied science. Students must be sponsored by their corporate employers who pay their tuition. This is the first systematic examination of the instructional process at an educational institution created in response to the demands of the governmental and corporate sectors' technological needs. This study includes an attempt to explore the effectiveness of that instructional process and the use of computers in distance education at NTU and implications for institutions of the future. This study focuses on distance education, corporate education, national universities and nontraditional institutions and the extent to which NTO exemplifies each of these concepts. It covers the organizational structure and methods of operation of NTU, and offers opinions of students, faculty, and other personnel associated with the institution as reflected by surveys, interviews, and the media.
Date: August 1988
Creator: Mays, Marilyn Elaine
Partner: UNT Libraries

An Experimental Investigation of Two-Phase, Two-Component Flow in a Horizontal, Converging-Diverging Nozzle

Description: Report that "describes an investigation of the flow characteristics in a horizontal, converging-diverging nozzle for a two-phase, two-component system" (p. 1) using air and water and "attempting to determine the effects of accelerating the liquid phase by the gaseous phase" (p. 1).
Date: July 1963
Creator: Vogrin, Joseph A., Jr.
Partner: UNT Libraries Government Documents Department

Implementation of an interactive matching scheme for the Kapchinskij-Vladimirskij equations in the WARP code

Description: The WARP code is a robust electrostatic particle-in-cell simulation package used to model charged particle beams with strong space-charge forces. A fundamental operation associated with seeding detailed simulations of a beam transport channel is to generate initial conditions where the beam distribution is matched to the structure of a periodic focusing lattice. This is done by solving for periodic, matched solutions to a coupled set of ODEs called the Kapchinskij-Vladimirskij (KV) envelope equations, which describe the evolution of low-order beam moments subject to applied lattice focusing, space-charge defocusing, and thermal defocusing forces. Recently, an iterative numerical method was developed (Lund, Chilton, and Lee, Efficient computation of matched solutions to the KV envelope equations for periodic focusing lattices, Physical Review Special Topics-Accelerators and Beams 9, 064201 2006) to generate matching conditions in a highly flexible, convergent, and fail-safe manner. This method is extended and implemented in the WARP code as a Python package to vastly ease the setup of detailed simulations. In particular, the Python package accommodates any linear applied lattice focusing functions without skew coupling, and a more general set of beam parameter specifications than its predecessor. Lattice strength iteration tools were added to facilitate the implementation of problems with specific applied focusing strengths.
Date: April 15, 2008
Creator: Chilton, Sven H.
Partner: UNT Libraries Government Documents Department

Cyclic Polarization of AA 3102 in Corrosive Electrolytes Containing Sodium Chloride and Ammonium Sulfate

Description: Corrosion of all aluminum microchannel heat exchangers present a challenge in automotive and heating, ventilation, and air conditioning (HVAC) industries. Reproducibility of Salt Water Acetic Acid Test (SWAAT) has been questioned and a need to new corrosion tests with better reproducibility has risen. Cyclic polarization, that is an electrochemical test, was explored for its suitability for the assessment of AA 3102 tube material that is currently a popular aluminum alloy used in manufacturing of heat exchanger. Corrosive electrolytes containing 3.5 % sodium chloride with 0.5 % ammonium sulfate (high chloride) or 0.5 % sodium chloride with 3.5 % ammonium sulfate (high sulfate) at their pH or acidic (pH=4) were used to measure corrosion potential (Ecorr), protection potential (Epp), pitting potential (Epit), Tafel constants (βa and βc), corrosion rate (mpy). Corrosive electrolyte used in SWAAT test (4.2% Sea Salt at pH 2.9) was also used to compare corrosion resistance of AA 3102 in SWAAT electrolyte compared to the other electrolytes used in this research. Scanning electron microscopy (SEM) was used to observe and document sample surface corrosion damage after each electrochemical test on all samples. Results of the cyclic polarization tests indicated that SWAAT electrolytes was the most aggressive electrolyte resulting in highest corrosion rates compared to all other electrolytes used in this investigation. SEM results indicated AA 3102 alloy exhibited higher pitting tendency in electrolytes with high sodium chloride whereas high sulfate electrolytes cause appearance of uniform corrosion surface damage on this alloy. Both high sulfate and SWAAT electrolytes showed intergranular corrosion but high chloride electrolyte showed severe pitting of AA 3102. Mohammad Navid Dorreyatim- Cyclic Polarization of AA 3102 in Corrosive Electrolytes Containing Sodium Chloride and Ammonium Sulfate. Master of Science (Mechanical and Energy Engineering), December 2016, 98 pp., references, 31 titles.
Date: December 2016
Creator: Dorreyatim, Mohammad
Partner: UNT Libraries

A Theoretical Framework for a Program of Graduate Education for Teachers and Administrators in Nursing Education

Description: The problem with which this investigation is concerned is the development of a theoretical framework for a program of graduate education for the preparation of teachers and administrators in nursing education. The theoretical framework for the program was developed after extensive research of the literature concerning graduate education generally and nursing specifically. Additional data were obtained from four different questionnaires sent to the presidents, chairmen, and faculty of all Texas colleges with programs for an Associate Degree in Nursing as well as to 100 students and 100 graduates representing all Texas programs for the Associate Degree in Nursing. The purpose of the study was to review the history of nursing, its development as a profession, and its system of education, including past, present, and future trends in each category of education. This survey gave a perspective to the graduate program proposed in this study. hen all fifty-seven accredited graduate nursing programs in the United States were analyzed to determine the current nature of graduate education in nursing and innovations initiated by specific graduate programs, as substantiated by the literature. The data from the questionnaires sent to all the Texas programs for the Associate Degree in Nursing paralleled the developments and facts revealed in the literature. From all of this information, a theoretical framework for a graduate program in nursing was developed. A description of the program follows. A master's degree received from an accredited university is considered the acceptable minimum preparation for positions of faculty and administrators of basic educational programs in nursing. The following graduate curriculum was developed in order to strengthen this preparation. The student in the master's degree curriculum is provided with the opportunity to capitalize on past knowledge, skill, and education acquired in any setting and to build on this foundation. A research, teaching/administration, and advanced ...
Date: December 1973
Creator: Bulbrook, Mary Jo Trapp
Partner: UNT Libraries

Ambient and elevated temperature fracture and cyclic-fatigue properties in a series of Al-containing silicon carbides

Description: A series of in situ toughened, Al, B and C containing, silicon carbide ceramics (ABC-SiC) has been examined with Al contents varying from 3 to 7 wt%. With increasing Al additions, the grain morphology in the as-processed microstructures varied from elongated to bimodal to equiaxed, with a change in the nature of the grain-boundary film from amorphous to partially crystalline to fully crystalline. Fracture toughness and cyclic fatigue tests on these microstructures revealed that although the 7 wt.% Al containing material (7ABC) was extremely brittle, the 3 and particularly 5 wt.% Al materials (3ABC and 5ABC, respectively) displayed excellent crack-growth resistance at both ambient (25 C) and elevated (1300 C) temperatures. Indeed, no evidence of creep damage, in the form of grain-boundary cavitation, was seen at temperatures at 1300 C or below. The enhanced toughness of the higher Al-containing materials was associated with extensive crack bridging from both interlocking grains (in 3ABC) and uncracked ligaments (in 5ABC); in contrast, the 7ABC SiC showed no such bridging, concomitant with a marked reduction in the volume fraction of elongated grains. Mechanistically, cyclic fatigue-crack growth in 3ABC and 5ABC SiC involved the progressive degradation of such bridging ligaments in the crack wake, with the difference in the degree of elastic vs. frictional bridging affecting the slope, i.e., Paris law exponent, of the crack-growth curve. In addition an investigation of fracture resistance in non-transforming ceramics toughened by grain bridging mechanism is presented using linear elastic fracture mechanics (LEFM). Linear superposition theorems are used for the superposition of crack opening displacements, as well as stress intensity factors, resulting from the external tractions and the internal compressive bridging stresses. Specifically weight functions are used to relate the CODs, stress intensity factors, and tractions and the bridging stress. Expressions are derived for apparent material resistance, the bridging ...
Date: August 30, 2004
Creator: Yuan, Rong
Partner: UNT Libraries Government Documents Department

[Revised Commencement Program for North Texas State Teachers College, August 23, 1941]

Description: Commencement program for the 1941 graduating class for the North Texas State Teachers College. Printed on the cover are the words, "The Twenty-Ninth Annual Summer Commencement of North Texas State Teachers College Denton, Texas Revised Copy Saturday, August the Twenty-Third Nineteen Hundred and Forty-One At Eight O'clock in the Evening The Auditorium." The program includes the order of service and a list of graduates for both the baccalaureate and master degrees.
Date: Summer 1941
Creator: North Texas State Teachers College
Partner: UNT Libraries Special Collections

[Commencement Program for North Texas State College, August 25, 1950]

Description: Commencement program for the 1950 graduating class of North Texas State College. Printed on the cover are the words, "Summer Commencement of North Texas State College. Denton, Texas. Friday, August Twenty-Fifth Nineteen Hundred and Fifty. At Eight o'Clock in the Evening. The Main Auditorium." The program includes the order of service and a list of graduates for both the baccalaureate and master degrees.
Date: August 1950
Creator: North Texas State College
Partner: UNT Libraries Special Collections

[Commencement Program for North Texas State College, August 25, 1949]

Description: Commencement program for the graduating class of 1949 of North Texas State College. Printed on the cover are the words, "Summer Commencement of North Texas State College. Denton, Texas. Thursday, August Twenty-Fifth. Nineteen Hundred and Forty-Nine. At Eight o'Clock in the Evening. The Main Auditorium." The program includes the order of service and a list of graduates for both the baccalaureate and master degrees.
Date: Summer 1949
Creator: North Texas State College
Partner: UNT Libraries Special Collections

[Commencement Program for North Texas State Teachers College, August 27, 1948]

Description: Commencement program for the 1948 graduating class of North Texas State Teachers College. Printed on the cover are the words, "Summer Commencement of North Texas State Teachers College. Denton, Texas. Friday, August Twenty-Seventh. Nineteen Hundred and Forty-Eight At Eight o'Clock in the Evening. The Main Auditorium." The program contains the order of service and a list of graduates for both the baccalaureate and master's degree.
Date: August 1948
Creator: North Texas State Teachers College
Partner: UNT Libraries Special Collections

[Commencement Program for North Texas State Teachers College, August 23, 1946]

Description: Commencement program for the graduating class of the North Texas State Texas College of 1946. Printed on the cover are the words, "The Thirty-Fourth Annual Summer Commencement of North Texas State Teachers College. Denton, Texas. Friday, August Twenty-Third Nineteen Hundred and Forty-Six. At Eight o'Clock in the Evening. The Auditorium." The program contains the order of service and a list of graduates for both the baccalaureate and master's degree.
Date: Summer 1946
Creator: North Texas State Teachers College
Partner: UNT Libraries Special Collections

[Revised Commencement Program for the North Texas State Teachers College, August 20, 1943]

Description: 1943 Commencement program of North Texas State Teachers College. Printed on the cover are the words, "The Thirty-First Annual Commencement of North Texas State Teachers College Denton, Texas Revised Friday, August the Twentieth Nineteen Hundred and Forty-Three At Eight o'Clock in the Evening The Auditorium." The program contains the order of service and a list of graduates for both the baccalaureate and masters degree.
Date: August 1943
Creator: North Texas State Teachers College
Partner: UNT Libraries Special Collections

[Commencement Program for North Texas State College, August 24, 1951]

Description: Commencement program for North Texas State College in 1951. Printed on the cover are the words, "Summer Commencement of North Texas. Denton, Texas. Friday August Twenty-Fourth Nineteenth Hundred and Fifty-One at Eight O'Clock in the Evening. The Men's Gymnasium." The program contains the order of service and a list of graduates for both the baccalaureate and master's degree.
Date: Summer 1951
Creator: North Texas State College
Partner: UNT Libraries Special Collections

[Commencement Program for North Texas State Teachers College, August 18, 1944]

Description: 1944 Commencement program for the North Texas State Teachers College graduation. Printed on the cover are the words, "The Thirty-Second Annual Summer Commencement of North Texas State Teachers College. Denton, Texas. Friday, August the Eighteenth Nineteen Hundred and Forty-Four At Eight o'Clock in the Evening. The Auditorium." The program contains the order of service and a list of graduates for both the baccalaureate and master's degree.
Date: Summer 1944
Creator: North Texas State Teachers College
Partner: UNT Libraries Special Collections

[Commencement Program for North Texas State Teachers College, January 31, 1946]

Description: Commencement program for the Winter Commencement of the 1946 graduating class of North Texas State Teachers College. Printed on the cover are the words, "Winter Commencement. North Texas State College. Thursday, January Thirty-First. Nineteen Hundred and Forty-Six at Eight o'Clock in the Evening. The Main Auditorium. Denton, Texas." The program includes the order of service and list of graduate for both the baccalaureate and master degrees.
Date: Winter 1946
Creator: North Texas State Teachers College
Partner: UNT Libraries Special Collections

[Commencement Program for North Texas State Teachers College, June 1, 1947]

Description: Commencement program for the June 1947 graduating class of the North Texas State Teachers College. Printed on the cover are the words, "The Fifty-Seventh Annual Commencement of North Texas State Teachers College. Denton, Texas. Sunday, June First. Nineteen Hundred and Forty-Seven At Eight o'Clock in the Evening. The Main Auditorium." The program contains the order of service and a list of graduates for both the baccalaureate and master's degree.
Date: June 1947
Creator: North Texas State Teachers College
Partner: UNT Libraries Special Collections