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The Psychological and Social Adjustment of International Students at a Selected Institution of Higher Education

Description: The purposes of this study were to examine the problems of international students, assess the intensity of these problems, and describe relationships between the intensity of the problems and the following demographic variables: age, gender, number of years in the study of English, number of years living in the United States, grade point average at North Texas State University, major area of study at North Texas State University, and country of origin. International students pragmatically view their sojourn in the United States as an educational experience that will allow them to improve their minds and to travel. Financial concerns were expressed by the desire to work either part time or during vacation periods. As a group, international students do not exhibit concerns which debilitate their movement toward established goals. However, there are individual students who are in need of cultural refraining, communication abilities, and coping skills.
Date: December 1978
Creator: Senner, Gary Allan
Partner: UNT Libraries
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Identification of the Cognitive Skills Expected of Graduating Nursing Students in Two-Year and Four-Year Programs

Description: This study was undertaken to identify the differences in cognitive behaviors expected of graduating students in two and four-year nursing education programs as perceived by instructors. The problem to which this study was addressed was the uniformity of assignment for graduates of the two programs as they enter initial employment in episodic care agencies. Of concern also was the lack of uniformity in the admission requirements for two-year graduates seeking a baccalaureate degree in nursing. The identification of significantly different expectations of the two groups of nurse educators for their graduating students indicates a need to examine the assignments of graduates in their initial employment. Further, there was greater agreement in the expected behaviors among the four-year program respondents than among those from the two-year programs as groups viewed their respective graduating students.
Date: December 1978
Creator: White, Geraldine J.
Partner: UNT Libraries
open access

Mulima

Description: Mulima is a work intended to be used as the score for a ballet. The composition utilizes a large orchestra: 2-3-3-3, 4-3-3-1, 5 percussion, and full strings. The work is constructed in one large act which is comprised of three scenes and lasts approximately 45 to 50 minutes.
Date: August 1978
Creator: Long, David J.
Partner: UNT Libraries
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Concertante : For Violoncello and Magnetic Tape

Description: The composition is in one movement for cello and two-channel tape, requiring approximately twelve minutes for performance. The character of the work is aggressive and decisive in nature, with areas of repose occurring only at the beginning and before the conclusion. The title "concertante" is used to describe a concert-piece in which each of the two instruments.
Date: May 1978
Creator: Headrick, Samuel Philip, 1952-
Partner: UNT Libraries
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Attitudes and Other Concerns Related to Women Being Employed as Public School Administrators in Texas

Description: Interest in this study was evoked by concern over the small percentage of women employed as school administrators. Despite recent legislation, this situation has not changed markedly. This study was needed to determine the current status, attitudes, and concerns of women certified as administrators in Texas with those of the superintendents of Texas public school districts? and to compare the differences of the two concerning this situation. It was concluded that not only did a larger percentage of the women prefer to be employed as elementary school administrators, but also the superintendents felt they would be more likely to be employed at that level. It was further concluded that a majority of the superintendents were likely to give women substantial consideration for employment as elementary school administrators, but were unlikely to hire them as chief administrators of their secondary schools. Many of the women also perceived that Texas school districts are still "in effect" participating in sexually discriminatory hiring practices whether or not the superintendents are aware of the situation. The attitudes of the women and the superintendents very clearly differed concerning opportunities available for female administrators in Texas.
Date: August 1978
Creator: Hurlbut, Jo Ann
Partner: UNT Libraries
open access

Variations on a Theme by Shostakovich

Description: The Variations on a Theme by Shostakovich is scored for an orchestra of 3 flutes, 3 oboes, 2 bassoons, contra-bassoon, 4 horns, 3 C trumpets, 3 trombones, harp, harpischord, piano, percussion and strings. The entire work is approximately 17 minutes in duration. The subject for the Variations comes from the Fifteenth Symphony of Shostakovich, last movement. There are many allusions to the writing of Shostakovich in terms of gesture, orchestration, and harmonic structure.
Date: May 1978
Creator: Miller, Karl Frederick
Partner: UNT Libraries
open access

A Descriptive Study of Returning Student Services and Programs in Public Four-Year Colleges and Universities in the United States

Description: Since the end of World War II, the number of returning college students aged twenty-five years or older has increased so rapidly in American colleges and universities that college administrators, either through lack of interest and understanding or through failure to function as proactive change agents, have not kept pace with the needs of older student populations. In recent years, as enrollment among traditional younger students has declined, enrollment among mature returning students has grown to the extent that they presently constitute more than a third of all college and university students in the United States. As a result of findings obtained in the study, the following recommendations are offered for consideration; (1) institutions of higher learning should place major emphasis upon development of Services and Programs for Returning Students; (2) colleges and universities should give greater priority to orientation program(s) for returning students; (3) returning students should be given credit for life experience and independent learning; (4) financial resources for returning student services should be standardized as line items in the institution's budget; (5) existing programs should be evaluated in order to determine their effectiveness; and (6) a follow-up study should be conducted in five years to provide statistical data for trend analysis.
Date: August 1978
Creator: Casey, Ives June
Partner: UNT Libraries
open access

Effects of Reality Therapy on Teacher Attitudes, Student Attitudes, Student Achievement, and Student Behavior

Description: This study investigated whether Reality Therapy classroom management techniques could be used effectively to improve teacher attitudes, student attitudes, student achievement, and student classroom behavior. The findings of the study support the following conclusions. 1. Reality Therapy inservice education and implementation of Reality Therapy Teaching techniques in classrooms produce significant changes in the way teachers regard student discipline. 2. implementation of Reality Therapy practices in junior high classrooms produces positive changes in attitude toward school environment. 3. Implementation of Reality Therapy techniques in junior high classrooms does not seem to be effective in producing changes in student attitude toward self. 4. Implementation of Reality Therapy techniques in junior high classrooms can be effective in producing higher student grade point averages. 5. Reality Therapy techniques in junior high classrooms are not effective in producing lower rates of student misbehavior.
Date: August 1978
Creator: Browning, Bobby Donald
Partner: UNT Libraries
open access

Components of Life Satisfaction of Older Texans: A Multidimensional Model

Description: The purpose of this study was to examine the relationship between majority and ethnic status and life satisfaction. Several studies have examined the relationship between race and life satisfaction. The comparisons have been between Anglos and Blacks, and no previous research has included Anglos, Blacks, and Mexican-Americans in studying the effect of majority and ethnic status on life satisfaction. The findings suggest that multidimensional models are feasible to measure life satisfaction of elderly individuals of different racial or ethnic groups. Furthermore, on the basis of this study future research should include the variable, transportation, in any multivariate analysis of life satisfaction.
Date: August 1978
Creator: Holley, Mary R.
Partner: UNT Libraries
open access

A Study of the Developmental Problems of an Educational Counseling and Information Brokering Center for Adults

Description: The purposes of this study were to identify the problems and issues encountered in the development of an educational information and counseling brokering service for adults and to determine their relative significance to the success of an educational brokering service. To accomplish this, the relevant developmental issues were identified by a search of the literature. These were sent to a consultant of the National Center for Educational Brokering who selected forty issues and problems as salient. These statements were formulated into a questionnaire to determine their significance in each stage of development. The initial questionnaire was submitted to four additional consultants for recommendations. The questionnaires were then mailed to the directors of 135 educational brokering centers listed in the Directory of the National Center for Educational Brokering. Based on the findings of the study, eleven issues were considered very significant by the total population of respondents. The three most significant issues were: flexibility and responsiveness in service, maintaining clarity of purpose while attempting to meet diverse needs, and insuring continuing financial viability.
Date: August 1978
Creator: Harkness, Helen Leslie
Partner: UNT Libraries
open access

Catalytic conversion of solvent refined coal to liquid products

Description: Catalytic reactions of solvent refined coal (SRC) were studied using mixed metal oxide and low melting Lewis acid catalysts in extracting solvent media. From characterization of the benzene- and cyclohexane-soluble products, ZnCl/sub 2/ and SnCl/sub 2/ were determined to be the most effective at hydrogenating and solubilizing SRC while assisting in heteroatom removal. ZnCl/sub 2/ and SnCl/sub 2/ were also found to be more effective at producing oil-like products rather than alphaltene-like products. Further enhancement of the solubilization of SRC could be achieved by the addition of isopropanol to the Lewis acid-substrate-solvent reaction mixture. Dry HCl was also investigated for its effect on the solubilization of SRC. Characterization of the solubilized products and residues was performed by elemental analysis, /sup 1/H-NMR, and gel permeation chromatography. Investigations were performed to determine what effect reaction temperature, hydrogen pressure, and catalyst loading had on the yield of soluble products as well as the chemical analyses of the products. The results showed that the conversion of SRC to soluble products increases monotonically with hydrogen pressure and catalyst loading. The effect of temperature is not as straightforward.
Date: February 1, 1978
Creator: Tanner, K.I. & Bell, A.T.
Partner: UNT Libraries Government Documents Department
open access

Thermodynamics of solid and liquid group III-V alloys

Description: Solid-state electrochemical techniques are applied to the Ga-In-Sb-O system to measure some thermodynamic properties important for the analysis of solid-liquid phase equilibria in these important semiconductor materials. The standard Gibbs energies of formation of the most stable oxides of gallium and of indium are determined with a high-temperature solid-state electrochemical cell utilizing calcia-stabilized zirconia as the solid electrolyte and a (CO + CO/sub 2/) gaseous mixture as the reference electrode.
Date: October 1, 1978
Creator: Anderson, T. J.
Partner: UNT Libraries Government Documents Department
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Chemistry of coal model compounds: cleavage of aliphatic bridges between aromatic nuclei catalyzed by Lewis acids.

Description: The condensed polynuclear aromatic clusters of coal are believed to be linked principally by straight-chain aliphatic bridges varying from 0 to 4 carbon atoms in length and the cleavage of these linkages is expected to be an important step in the coal liquefaction process. This study focuses on the means by which Lewis acid catalysts, specifically AlCl/sub 3/ and ZnCl/sub 2/, promote the cleavage of these linkages. To facilitate product identification and interpretation of reaction mechanisms, organic compounds which model the aliphatic bridges were used on substrates. All experiments were performed in a magnetically stirred autoclave under either an H/sub 2/ or N/sub 2/ atmosphere at elevated pressure to determine the role of H/sub 2/. Reaction temperatures ranging from 200 to 350/sup 0/C were used to avoid the complication of pyrolysis reactions. Reaction products were identified with the aid of gas chromatography/mass spectrometry, and quantitative product yields were determined by gas chromatography. Experiments with AlCl/sub 3/ and the substrates containing two phenyl rings linked by 0 to 4 carbon atoms showed that AlCl/sub 3/ catalyzed cleavage of all the aliphatic bridges. ZnCl/sub 2/ was totally inactive in cleaving the alkyl bridges in these compounds. Substitution of a phenyl group by a hydroxyphenyl or a naphthyl group in the model compounds promoted the cleavage of aliphatic linkages in the presence of AlCl/sub 3/. In contrast to reactions with the diphenylalkanes, ZnCl/sub 2/ was also found to catalyze the cleavage of these compounds. Plausible reaction mechanisms are proposed which explain the experimental results. The role of gaseous H/sub 2/ in these mechanisms was also investigated.
Date: April 1, 1978
Creator: Taylor, N. D.
Partner: UNT Libraries Government Documents Department
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Flow cytometric analysis of mitotic cycle perturbation by chemical carcinogens in cultured epithelial cells. [Effects of benzo(a)pyrene-diol-epoxide on mitotic cycle of cultural mouse liver epithelial cells]

Description: A system for kinetic analysis of mitotic cycle perturbation by various agents was developed and applied to the study of the mitotic cycle effects and dependency of the chemical carcinogen benzo(a)pyrene-diolepoxide, DE, upon a mouse lever epithelial cell line, NMuLi. The study suggests that the targets of DE action are not confined to DNA alone but may include cytoplasmic structures as well. DE was found to affect cells located in virtually every phase of the mitotic cycle, with cells that were actively synthesizing DNA showing the strongest response. However, the resulting perturbations were not confined to S-phase alone. DE slowed traversal through S-phase by about 40% regardless of the cycle phase of the cells exposed to it, and slowed traversal through G/sub 2/M by about 50%. When added to G/sub 1/ cells, DE delayed recruitment of apparently quiescent (G/sub 0/) cells by 2 hours, and reduced the synchrony of the cohort of cells recruited into active proliferation. The kinetic analysis system consists of four elements: tissue culture methods for propagating and harvesting cell populations; an elutriation centrifugation system for bulk synchronization of cells in various phases of the mitotic cycle; a flow cytometer (FCM), coupled with appropriate staining protocols, to enable rapid analysis of the DNA distribution of any given cell population; and data reduction and analysis methods for extracting information from the DNA histograms produced by the FCM. The elements of the system are discussed. A mathematical analysis of DNA histograms obtained by FCM is presented. The analysis leads to the detailed implementation of a new modeling approach. The new modeling approach is applied to the estimation of cell cycle kinetic parameters from time series of DNA histograms, and methods for the reduction and interpretation of such series are suggested.
Date: August 1, 1978
Creator: Pearlman, A.L.
Partner: UNT Libraries Government Documents Department
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Equation of state and transport measurements on expanded liquid metals up to 8000/sup 0/K and 0. 4 GPa

Description: Equilibrium measurements of pressure, enthalpy, density, temperature and resistivity have been made on liquid lead, platinum, gold-copper, uranium, niobium, and niobium-hafnium at high temperatures and pressures. A unique method of determining sample temperatures from multi-channel fast radiation pyrometry has been developed and used to calculate temperatures between 1600 and 8000 K without definitive emissivity information. Pseudo-potential theory has been used to model the lead resistivity and equation of state measurements and t-matrix theory has been applied to the uranium resistivity data.
Date: May 1, 1978
Creator: Hodgson, William Mark
Partner: UNT Libraries Government Documents Department
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Initial Research for the Development or Purchase of a Computerized Synthesizer For Use as a Composer's Aid

Description: The author's primary goal is to begin research leading ot the attainment of a low cost computer/music system which will allow the composer to write polyphonic music of up to eight voices into a computer through a terminal, and have the music played back by means of computer synthesized sound or by means of a conventional synthesizer controlled by a computer via digital-to-analog converters. The goal system will allow the composer to retreat and hear his product objectively as the painter steps back to review his canvas.
Date: August 1978
Creator: Vaughan, Scott
Partner: UNT Libraries
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A Report on Control of Access to Stored Information in a Computer Utility

Description: Time-sharing computer systems permit large numbers of users to operate on common sets of data and programs. Since certain parts of these computer resources may be sensitive or proprietary, there exists the risks that information belonging to one user, may, contrary to his intent, become available to other users, and there is the additional risk that outside agencies may infiltrate the system and obtain information. The question naturally arises of protecting one user's stored program and data against unauthorized access by others.
Date: 1978
Creator: Shakiba-Jahromi, Mostafa
Partner: UNT Libraries
open access

A Computer Solved Scheduling Problem

Description: The purpose of this paper is to illustrate the use of the computer in solving complex real time scheduling problems. This problem involves the airline industry and is concerned with the local scheduling of security personnel to the gate areas for outgoing flights from one terminal at Dallas-Fort Worth airport. The purpose of this type of program is to enhance personnel efficiency and management control over a large group of people while cutting the cost of lower management.
Date: April 1978
Creator: Messinger, Stanley Eugene
Partner: UNT Libraries
open access

A Method for Applying Scientific Subroutine Package in Microprocessor

Description: The scientific subroutine package is one of the most important parts of the software for the scientific industry. By now, most big computers have scientific packages, but applying such a software package in microprocessors requires consideration of the microprocessor's facilities, such as limited main memory, slow execution time, and only a few small registers. In any scientific package, the trigonometric functions are the ones more widely used. This paper discusses a method for implementing several trigonometric function programs in a scientific package in microprocessors. These programs will contain routines for computing sin, cos, tan, and cot of any angle within the range of (-360°,+360°).
Date: April 1978
Creator: Latifi, Akbar
Partner: UNT Libraries
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Analysis and Development of FACE Automatic Apparatus for Rapid Identification of Transuranium Isotopes

Description: A description of and operating manual for the FACE Automatic Apparatus has been written along with a documentation of the FACE machine operating program, to provide a user manual for the FACE Automatic Apparatus. In addition, FACE machine performance was investigated to improve transuranium throughput. Analysis of the causes of transuranium isotope loss was undertaken both chemical and radioactive. To lower radioactive loss, the dynamics of the most time consuming step of the FACE machine, the chromatographic column output droplet drying and flaming, in preparation of sample for alpha spectroscopy and counting, was investigated. A series of droplets were dried in an experimental apparatus demonstrating that droplets could be dried significantly faster through more intensie heating, enabling the FACE machine cycle to be shortened by 30-60 seconds. Proposals incorporating these ideas were provided for FACE machine development. The 66% chemical loss of product was analyzed and changes were proposed to reduce the radioisotopes product loss. An analysis of the chromatographic column was also provided. All operating steps in the FACE machine are described and analyzed to provide a complete guide, along with the proposals for machine improvement.
Date: September 1, 1978
Creator: Sebesta, E.H.
Partner: UNT Libraries Government Documents Department
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SUPERCONDUCTING TRANSITION EDGE BOLOMETER AND NOISE IN THIN FILMS

Description: We report the development of the composite superconducting transition edge bolometer. The temperature sensitive element is an aluminum strip evaporated onto the sapphire substrate. A bismuth film evaporated on the reverse side of the substrate is used to absorb the submillimeter radiation. The noise limitation of the bolometer is calculated. The fabrication and measured performance are described. The best electrical NEP (noise-equivalent-power) obtained is (1.7 {+-} 0.1) x 10{sup -15} WHz{sup -1/2} at 2 Hz at an operating temperature of 1.27 K. This NEP is within a factor of 2 of the thermal noise limit. The effective absorptivity of the bismuth film is measured to be 0.47 {+-} 0.05, and the corresponding detectivity D* is calculated to be (1.1 {+-} 0.1) x 10{sup 14} cm w{sup -1}Hz{sup 1/2}. Suggestions are made for further improvements in sensitivity. The current-dependent noise in thin metal films at the superconducting transition has been further investigated. The measured noise power spectrum of the tin film on sapphire substrate at the superconducting transition is compared with the cosine transforms of the decay curves obtained from step-function and {delta}-function thermal perturbations. The nature of the noise driving term is found to be a random current flowing inside the sample, in agreement with the uncorrelated thermal fluctuation model. This result is consistent with the case of a freely suspended tin fiber at the superconducting transition, but in contrast to the room temperature measurement where the cosine transform of the step-function response gives the noise power spectrum, in agreement with the correlated fluctuation model.
Date: June 1, 1978
Creator: Yeh, Nan-Hsiung
Partner: UNT Libraries Government Documents Department
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ELECTROCHEMICAL MACHINING OF CARBIDES AND BORIDES

Description: The use of high rate anodic dissolution (electrochemical machining) for shaping titanium carbide, zirconium carbide, titanium boride and zirconium boride has been investigated in 2N potassium nitrate and 3N sodium chloride under current densities ranging from 20 to 120 A/cm{sup 2} (corresponding to cutting rates of 0.3 to 1.8 mm/min). The dissolution stoichiometry for all these materials is independent of the current density in the range 20 to 120 A/cm{sup 2}. Both titanium and zirconium appear to dissolve in the +4 state, boron in the +3 state and the weight loss measurements indicate that carbon is oxidized to CO and CO{sub 2}. The current voltage curves permit to establish that, over the entire current density and flow range investigated, dissolution occurs in the transpassive state. The surface roughness obtained on TiC and ZrC is within 3-5 {micro}m and is independent of current density, applied voltage or flow rate.
Date: July 1, 1978
Creator: Dissaux, Bernard Antoine; Muller, Rolf H. & Tobias, Charles W.
Partner: UNT Libraries Government Documents Department
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CONTAMINATION OF GROUNDWATER BY ORGANIC POLLUTANTS LEACHED FROM IN-SITU SPENT SHALE

Description: The potential for contamination of groundwater by organic pollutants leached from in-situ spent shale was studied in a series of laboratory leaching experiments. Both batch-mode and continuous-flow column experiments were conducted to study the leaching phenomenon. Experimental variables included retorting characteristics of spent shale, leaching time, initial quality of leach water, temperature of leach water, and particle size of spent shale. Several unique samples of spent shale were examined during the eaching experiments, including spent shale samples produced during combustion retorting, inert gas retorting, and combustion retorting employing recycle gas. The solid-phase organic carbon content of spent shale samples ranged from 0.2 to 3.9 percent by weight. Leachate derived from the batch-mode experiments was analyzed for organic carbon, organic nitrogen, phenols, and acid/base/netral fractions. The highest levels of organic carbon were detected in leachate derived from spent shale produced during either inert gas retorting or combstion retorting using recycle gas. The highest levels of phenols were observed in leachate obtained from spent shale produced during inert gas retorting; significant levels of organic nitrogen were also detected in various leachate samples. The most predominant organic fraction measured in leachate samples was the neutral fraction associated with spent shale produced during inert gas retorting. Batch-mode experimental results describing equilibrium conditions were analyzed according to the Freundlich and langmuir isotherm models. Those models were found to be appropriate for describing equilibrium relationships between leachate and spent shale produced during inert gas retorting. To a somewhat lesser extent, these same models were found to be appropriate for modeling equilibrium relationships involving combustion-retorted spent shale. A kinetic analysis of results derived from the continuous-flow column experiments was conducted in an attempt to identify a rate-controlling mass transfer mechanism. Internal diffusion appeared to be the most likely rate-limiting mechanism for leaching from combustion-retorted spent shale. In …
Date: June 1, 1978
Creator: Amy, Gary L.
Partner: UNT Libraries Government Documents Department
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The Incorporation of Silkscreen Techniques in the Decoration of Raku-Fired Ceramics

Description: The questions answered by this investigation are as follows: 1. Which silkscreens and stencils will work in screening flat and three-dimensional objects? 2. Which mediums and coloring agents will survive a glaze firing to produce an acceptable image? 3. How can the image be modified by screening during the different stages of a ceramic piece (wet, green, bisque, glazed)? 4. What glazes and glaze applications will be compatible? 5. Generally, what is the relationship between the image and the object?
Date: May 1978
Creator: Allen, James Franklin
Partner: UNT Libraries
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