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Use of a semiconductor laser in infrared spectroscopy

Description: A semiconductor laser has certain properties which makes its use desirable as a continuous monitor of atmospheric pollutants. Its energy output is concentrated in widely separated energy modes of very narrow bandwidths (less than 10/sup -5/ cm/sup -1/) which can be centered on one infrared absorption line of one gas. This makes the laser quite selective. The energy in each mode is typically greater than 200 ..mu.. watts, and, because of the laser's small size, its light energy can be colli… more
Date: December 1, 1977
Creator: Morris, R. N.
Partner: UNT Libraries Government Documents Department
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Inductively coupled plasma--atomic emission spectrometry: trace elements in oil matrices

Description: The simultaneous determination of up to 20 trace elements in various oil matrices by inductively coupled plasma-atomic emission spectrometry is reported. The oil matrices investigated were lubricating oils (for wear metals), fuel oil, centrifuged coal liquefaction product, crude soybean oil, and commercial edible oils. The samples were diluted with appropriate organic solvents and injected into the plasma as an aerosol generated by a pneumatic nebulization technique. Detection limits of the 28 … more
Date: December 1, 1977
Creator: Peterson, C. A.
Partner: UNT Libraries Government Documents Department
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Analytical applications of resins containing amide and polyamine functional groups

Description: A dibutyl amide resin is used for the separation of uranium(VI), thorium(IV), and zirconium(IV) from each other and several other metal ions. Uranium(VI) and thorium(IV) are determined in the presence of large excesses of foreign metal ions and anions. A practical application of the amide resin is studied by determining uranium in low grade uranium ores. The amide resin is also used for the selective concentration of gold(III) from sea water.
Date: December 1, 1977
Creator: Orf, G. M.
Partner: UNT Libraries Government Documents Department
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Lanthanide extraction with 2,5-dimethyl-2-hydroxyhexanoic acid

Description: This research is concerned with the solvent extraction into chloroform of the lanthanides, using 2,5-dimethyl-2-hydroxyhexanoic acid (DMHHA). This acid is the first ..cap alpha..-hydroxy aliphatic acid to be studied as an extracting agent for the lanthanides. The chloroform-water DMHHA partition constant was determined to be 1.0 (at 0.1 M ionic strength and 25/sup 0/C). The acid dimerizes in chloroform with a constant of 56. The light lanthanides can be extracted into chloroform by forming comp… more
Date: December 1, 1977
Creator: Miller, J. H.
Partner: UNT Libraries Government Documents Department
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A Study of the Physical Facilities of Industrial Arts Metalworking Laboratories in the State of Texas

Description: The purposes for conducting this study were to ascertain whether the housing for industrial arts metalworking laboratories was adequate, whether the enrollment of the school showed any correlation with the availability of a metalworking facility, and to what extent the physical facility for metalworking laboratories met current standards.
Date: December 1972
Creator: Teague, Ben W.
Partner: UNT Libraries
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Passive Dispersal of Algae and Protozoa Internally and Externally by Selected Aquatic Insects

Description: This investigation was concerned with three aspects of the problem of passive dispersal of algae and protozoa by aquatic insects: the role of odonates in passive dispersal of viable small aquatic organisms, the passage of viable algae and protozoa through digestive tracts of field-collected herbivorous and carnivorous aquatic insects, and the viability duration of selected algae, during insect transport under monitored conditions.
Date: December 1970
Creator: Solon, Bernard M. (Bernard Michael), 1932-
Partner: UNT Libraries
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Multiconfigurational electronic wavefunctions in the full optimized reaction space: the isomerization of nitrosyl hydride to nitrogen hydroxide in the lowest singlet and triplet states

Description: Energy curves are determined for the lowest singlet and triplet states of the HNO molecule. The geometry is varied in that the hydrogen moves through 13 positions around the NO core to describe the isomerization reaction HNO yields HON. Quantitatively determined are the stable and metastable equilibrium positions in both states, the energy differences between these two equilibrium positions and between the two states, and the barriers with respect to isomerization. The calculations are carried … more
Date: December 1, 1977
Creator: Dombek, M. G.
Partner: UNT Libraries Government Documents Department
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Electronic transitions of some pi-molecular charge transfer complexes. [Anthracene--pyromellitic dianhydride (PMDA) or pyrene--PMDA in naphthalene--PMDA host]

Description: A unique phonon progression in the phosphorescence spectrum of pyrene-PMDA (Py-PMDA) in naphthalene-PMDA (N-PMDA) is reported. Calculations of the electron-phonon coupling strength parameter for the ground and excited states indicate strong coupling for the fractional CT contribution of Py-PMDA to the observed phosphorescent state. Model calculations indicate that the observed low frequency phonon mode corresponds to a low energy rotation of the rigid guest complex and not a symmetric donor-acc… more
Date: December 1, 1977
Creator: Beckman, R. L.
Partner: UNT Libraries Government Documents Department
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Relationship of MMPI Profile Clusters to Pain Behaviors

Description: The purpose of this study is to replicate and extend earlier work involving cluster analysis of MMPI profiles among persons with chronic low back pain. There are two specific goals. The first goal is to demonstrate the existence in a new sample of four distinct and homogenous profile clusters that have been found in previous research. The second goal is to investigate the relationship of the four profiles to the subjects, self-reported pain history and response to treatment. This study conclude… more
Date: December 1979
Creator: McGill, Jerry C.
Partner: UNT Libraries
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A Survey of Speech Programs in the Public Community Colleges in the State of Texas

Description: This study is a survey of public community college speech programs in Texas. An investigation of the literature revealed that only three similar studies had been made concerning Texas junior colleges. Chapter Four concludes the study by reviewing the current status of public community college speech programs in Texas and making recommendations for the improvement of these speech programs.
Date: December 1979
Creator: Anderson, Johnny R.
Partner: UNT Libraries
open access

Superintendents' Value Perceptions Regarding P.L. 94-142 as it Applies to Texas School Districts

Description: This study addressed superintendents' value perceptions of nineteen component parts of P.L. 94-142, The Education For All Handicapped Children Act of 1975. In addition, the study sought to determine whether relationships existed between superintendents' value perceptions of P.L. 94-142 and (1) school district size and (2) total years experience as a superintendent. As a result of this research, twenty-one conclusions were drawn, consisting of Texas superintendents' perceptions of several aspect… more
Date: December 1979
Creator: Koenig, Joseph P.
Partner: UNT Libraries
open access

Early English Organ Music: Some Contributions from the Mulliner Book of W. Blitheman, T. Tallis and J. Taverner: Together with Three Recitals of Selected Works of J. S. Bach, D. Buxtehude, M. Duruflé, C. Franck, G. Frescobaldi, J. J. Frogerber, P. Hindemith, O. Messiaen, M. Reger, J. H. Tallis, and C.-M. Widor

Description: The lecture recital was given April 16, 1971. An Excellent Meane, six settings of Gloria Tibi Trinitas, Eterne rerum conditor, and Te Deum laudamus by William Blitheman, In Nomine by John Taverner, and Ecce tempus idonem by Thomas Tallis were performed, together with a choir of four men's voices, following a lecture on various aspects of organ music in early Tudor England. In addition to the lecture recital, three other public recitals, all solo programs, were performed. The first solo recital,… more
Date: December 1977
Creator: Lowry, David Michael
Partner: UNT Libraries
open access

Financial Leverage and the Cost of Capital

Description: The objective of the research reported in this dissertation is to conduct an empirical test of the hypothesis that, excluding income tax effects, the cost of capital to a firm is independent of the degree of financial leverage employed by the firm. This hypothesis, set forth by Franco Modigliani and Merton Miller in 1958, represents a challenge to the traditional view on the subject, a challenge which carries implications of considerable importance in the field of finance. The challenge has led… more
Date: December 1977
Creator: Brust, Melvin F.
Partner: UNT Libraries
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An Examination of the Hawthorne Effect in a Verbal Learning Situation in an Educational Setting

Description: This study was an examination of the Hawthorne Effect in a verbal learning situation in an educational setting. The Hawthorne Effect was defined as the facilitating effect(s) produced in experimental situations when the subjects of the experiment expect that they are the objects of special attention. The purpose of the study was to determine if contamination by the Hawthorne Effect existed in an educational setting. Comparisons were made between "experimentally inexperienced" subjects and "expe… more
Date: December 1977
Creator: Simpson, Bert L.
Partner: UNT Libraries
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An Investigation into the Determinants of Performance in the Dual-Fund Industry in the United States from Inception Through 1973

Description: This research is a systematic, in depth empirical test of the strong form of the efficient market hypothesis (EMH) using the dual-fund industry as the research subject. Unlike most strong-form EMH research, this study deals with a small, homogeneous sector of the investment company industry with a comparable origin date. To obtain homogeneity of the research subjects, the sample size is necessarily small (7), thus, making it difficult to find statistically significant results. In general, portf… more
Date: December 1976
Creator: Belt, Brian
Partner: UNT Libraries
open access

The Nocturnes of Frédéric Chopin and Gabriel Fauré, a Lecture Recital, Together with Three Recitals of Selected Works by Other Composers for Piano

Description: The romantic piano literature contains three important collections of nocturnes. The nocturnes of John Field (1782-1837) were the first to appear, and were followed by collections from Frederic Chopin (1810-1849) and Gabriel Faure (1845-1924). While the relationship of the nocturnes of Field to those of Chopin is well documented, the corresponding relationship between Faure and Chopin is not. This study contains a detailed examination of this relationship, and shows the precise nature of Chopin… more
Date: December 1979
Creator: Roberson, Richard E.
Partner: UNT Libraries
open access

Responsibilities of Department Chairpersons as Perceived by Exemplary High School Principals

Description: The problem of this study was to identify a means for improving the administration of curriculum and instruction by exploring the utilization of leadership personnel in addition to the principal. This study focused on the determination of the responsibilities that should be delegated chairpersons and the degree of autonomy that should be associated with each responsibility. Major implications were as follows. 1) Job descriptions should be developed for department chairpersons listing responsibi… more
Date: December 1979
Creator: Ritter, William E.
Partner: UNT Libraries
open access

George I. Sanchez: Don Quixote of the Southwest

Description: This historical study examines the career of George I. Sanchez, New Mexican educator, who led many political and educational battles in New Mexico and Texas to improve educational opportunities for Spanish-speaking children. Archival materials from the State Records' Center of New Mexico, the papers of Senator Bronson M. Cutting, the Rockefeller Foundation Archives, the papers of President Lyndon Baines Johnson, Sanchez's private papers, unpublished materials at the University of Texas in Austi… more
Date: December 1976
Creator: Leff, Gladys R.
Partner: UNT Libraries
open access

Counselor Perception of Selected Client Attributes and the Relationship of These Perceptions to the Counselors' Own Possession of These Same Attributes

Description: The purposes of this study were to determine the accuracy of counselor perception of client attributes after an initial interview, to determine the relationship that exists between counselors' perceptions of a client's attributes and the counselors' possession of the same attributes, to determine the accuracy of counselor self-perception and to determine whether there were significant differences between counselors who are accurate perceivers and counselors who are inaccurate perceivers of clie… more
Date: December 1976
Creator: Elder, Wynona Tipton
Partner: UNT Libraries
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The Personal, Social, and Academic Adjustment Problems of Arab Students at Selected Texas Institutions of Higher Education

Description: The problem of this study was to determine the personal, social, and academic adjustment problems of Arab students at selected Texas institutions of higher education. The students in this study were 315 undergraduate and graduate Arab students attending four Texas institutions of higher education who were enrolled in the spring semester of 1979. The purpose of this study was twofold: (1) to identify the personal, social, and academic adjustment problems perceived by Arab students; and (2) to an… more
Date: December 1979
Creator: Saleh, Mahmoud A.
Partner: UNT Libraries
open access

Biofeedback and Progressive Relaxation in the Treatment of Muscle Tension Headaches: A Comparison

Description: This study was designed to compare the clinical effectiveness of EMG biofeedback and progressive relaxation training in the treatment of muscle tension headache. These procedures also were compared with a treatment-element control group. Results from this study indicated that EMG biofeedback, progressive relaxation, and the control procedures all led to significant improvements across sessions on EMG and most self-report measures. There was little evidence that either treatment technique was su… more
Date: December 1979
Creator: Trahan, Donald Everett
Partner: UNT Libraries
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