Resource Type
Partner
Collection
UNT Theses and Dissertations
432
Office of Scientific & Technical Information Technical Reports
257
Technical Report Archive and Image Library
5
TRAIL Microcard Collection
3
UNT Undergraduate Student Works
3
UNT Graduate Student Works
2
Abilene Library Consortium
1
National Advisory Committee for Aeronautics Collection
1
Sayles and Sayles Collection
1
Southwestern University Archival Collections
1
1 More
Degree Department
Degree Discipline
Degree Level
States
Decade
Month
Language
702 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
702
next
Base Effects on the Thermal Decomposition of Sec-butyllithium Solutions
The pyrolysis of sec-butyllithium in solution was studied in an attempt to understand the loss of stereo-specificity and the atypical kinetics that have been reported. Additionally, the effect of added lithium alkoxides was studied to determine their effects on the highly reactive sec-butyllithium substrate.
Date:
June 1966
Creator:
Adams, George Michael
System:
The UNT Digital Library
The Position of Texas in the Relations Between the United States and Mexico from 1876 to 1910
"The purpose of this study was to show the position of Texas in the relations between the United States and Mexico from 1876 to 1910. With this thought in mind, the general problem has been to link the two countries through Texas. The Texas border relations between the United States and Mexico during this period were interesting because they showed the continued success of the efforts of the past years in building up better principles of settlement. " --leaf 129
Date:
June 1942
Creator:
Alexander, Gladys M.
System:
The UNT Digital Library
The Nocturnes of Chopin
John Field (1782-1837), an Irishman, was the first composer to use the French term "nocturne," and was the inventor of the nocturne for piano. It can be seen with a glance at the scores that the orchestral notturni by the eighteenth century composers were very different than what is generally thought of today as a nocturne. Field introduced the idea of the nocturne that has remained much the same since. Frederic Chopin enlarged and improved the genre invented by Field, but it was Field's originality that brought this type of piece to piano literature. Indeed, John Field is hardly remembered today except as the inventor of the nocturne for the piano and for his influence on Chopin's Nocturnes. For that alone musicians will remain indebted to him.
Date:
June 1957
Creator:
Alexander, Monte Hill Davis
System:
The UNT Digital Library
Pressure-Flow Relationships in the Isolated Cerebral Circulation of the Dog
The purpose of this investigation is to determine the pressure-flow relationships in the isolated canine cerebral vascular bed. These relationships in vessels which supply an organ surrounded by bone are theoretically influenced by limiting factors which are not present in those vessels surrounded by soft tissue. An evaluation of the extent of these limitations is essential to thorough understanding of the dynamics of the cerebral vascular bed.
Date:
June 1962
Creator:
Alexander, William Carter
System:
The UNT Digital Library
Measurement of Single Spin Asymmetries in Semi-Inclusive Deep Inelastic Scattering Reaction n↑ ( e,e' pi{sup +}) X at Jefferson Lab
What constitutes the spin of the nucleon? The answer to this question is still not completely understood. Although we know the longitudinal quark spin content very well, the data on the transverse quark spin content of the nucleon is still very sparse. Semi-inclusive Deep Inelastic Scattering (SIDIS) using transversely polarized targets provide crucial information on this aspect. The data that is currently available was taken with proton and deuteron targets. The E06-010 experiment was performed at Jefferson Lab in Hall-A to measure the single spin asymmetries in the SIDIS reaction n↑(e, e′π{sup ±}/K{sup ±})X using transversely polarized {sup 3}He target. The experiment used the continuous electron beam provided by the CEBAF accelerator with a beam energy of 5.9 GeV. Hadrons were detected in a high-resolution spectrometer in coincidence with the scattered electrons detected by the BigBite spectrometer. The kinematic coverage focuses on the valence quark region, x = 0.19 to 0.34, at Q{sup 2} = 1.77 to 2.73 (GeV/c){sup 2}. This is the first measurement on a neutron target. The data from this experiment, when combined with the world data on the proton and the deuteron, will provide constraints on the transversity and Sivers distribution functions on both the u …
Date:
June 1, 2010
Creator:
Allada, Kalyan
System:
The UNT Digital Library
A Comparative Study of Three Sonatas for Solo Brass Instruments and Piano by Paul Hindemith
In the years during the writing of The Craft of Musical Composition, and for the next few years afterwards, Hindemith was engaged in writing a solo sonata for each of the instruments of the orchestra. Muser states that this series of sonatas continues a definite policy of providing music for people who want to play music, and not merely to listen to it. The three sonatas for solo brass instruments and piano were written during this period. The sonatas, written for trumpet, horn, and trombone, were written in the following order: Sonata for Trumpet and Piano—1939; Sonata for Horn and Piano—1939; Sonata for Trombone and Piano—1941. These sonatas, being written rather closely together, should have certain stylistic characteristics in common, and there should also be certain features peculiar to each sonata. To study these sonatas and compare them with each other structurally and stylistically is the purpose of this work.
Date:
June 1957
Creator:
Alley, Edward Lee
System:
The UNT Digital Library
CARBON-13 NMR STUDIES OF LIQUID CRYSTALS
High resolution, proton decoupled {sup 13}C nmr are observed for a series of neat nematic liquid crystals, the p-alkoxyazoxybenzenes, and a smectic-A liquid crystal, diethylazoxydibenzoate in a magnetic field of 23 kG. The (uniaxial) order parameters S = <P{sub 2}(cos{theta})> are found to be about 0.4 and 0.9 for the nematic and smectic-A phase respectively at the clearing points. The order parameter increases with decreasing temperature in the nematic phase but is constant, or nearly so, with temperature in the smectic-A phase. In the nematic series studied, the ordering exhibits an even-odd alternation along the series and qualitative agreement with a recent theory due to Marcelja is found. In both phases, the spectra show that the molecule rotates rapidly about its long axis. Tentative conclusions about molecular conformational motion and {sup 14}N spin relaxation are presented for both nematic and smectic-A phases. In the smectic-A phase, the sample is rotated about an axis perpendicular to H{sub 0} and the resulting spectra are discussed. The theory of observed chemical shifts in liquid crystals is treated in an appendix. Equations are derived which relate the nmr spectra of liquid-crystals to the order parameters. A model for the smectic-C phase due to Luz …
Date:
June 1, 1975
Creator:
Allison, Stuart
System:
The UNT Digital Library
The Relationship between the Interaction of Two Anxiety Variables and Creative Production
It is evident that educators and industrial psychologists alike recognize the effect that situational climate may have upon creative production. The present study will, hopefully, contribute some useful information leading to a better definition of the relationship between anxiety and creative production, which will lead in time to suggestions regarding the essential conditions of an optimum creative climate. The exploration of some of the aspects involved in situational climates is the point of departure for the present study.
Date:
June 1967
Creator:
Allred, Raymond Coye, 1930-
System:
The UNT Digital Library
Multiple Window Editor
This paper is written to present the design purpose and design process of the Multiple Window Editor. Multiple Window Editor is a software which allows the user to edit or view different files or the same file on the screen by the window facilities provided by this software. All the windows can be dynamically created, changed, moved, and destroyed. The main purpose of this program is to improve the programming environment for the users. The design motivations will be introduced through the comparison of the present existing window facilities and the editor components. The design process will be introduced by analyzing the design decision, design tradeoffs and implementation problems.
Date:
June 1986
Creator:
Alphy, Yu Cherng-Der
System:
The UNT Digital Library
Novel materials and methods for solid-phase extraction and liquid chromatography
This report contains a general introduction which discusses solid-phase extraction and solid-phase micro-extraction as sample preparation techniques for high-performance liquid chromatography, which is also evaluated in the study. This report also contains the Conclusions section. Four sections have been removed and processed separately: silicalite as a sorbent for solid-phase extraction; a new, high-capacity carboxylic acid functionalized resin for solid-phase extraction; semi-micro solid-phase extraction of organic compounds from aqueous and biological samples; and the high-performance liquid chromatographic determination of drugs and metabolites in human serum and urine using direct injection and a unique molecular sieve.
Date:
June 24, 1997
Creator:
Ambrose, D.
System:
The UNT Digital Library
CONTAMINATION OF GROUNDWATER BY ORGANIC POLLUTANTS LEACHED FROM IN-SITU SPENT SHALE
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 …
Date:
June 1, 1978
Creator:
Amy, Gary L.
System:
The UNT Digital Library
Measurement of the W Boson Mass with the D0 Run II Detector using the Electron P(T) Spectrum
This thesis is a description of the measurement of the W boson mass using the D0 Run II detector with 770 pb{sup -1} of p{bar p} collision data. These collisions were produced by the Tevatron at {radical}s = 1.96 TeV between 2002 and 2006. We use a sample of W {yields} e{nu} and Z {yields} ee decays to determine the W boson mass with the transverse momentum distribution of the electron and the transverse mass distribution of the boson. We measure M{sub W} = XXXXX {+-} 37 (stat.) {+-} 26 (sys. theo.) {+-} 51 (sys. exp.) MeV = XXXXX {+-} 68 MeV with the transverse momentum distribution of the electron and M{sub W} = XXXXX {+-} 28 (stat.) {+-} 17 (sys. theo.) {+-} 51 (sys. exp.) MeV = XXXXX {+-} 61 MeV with the transverse mass distribution.
Date:
June 1, 2008
Creator:
Andeen, Timothy R., Jr.
System:
The UNT Digital Library
The Fission of Lutetium at Low Excitation Energy
None
Date:
June 1, 1964
Creator:
Andre, H. W.
System:
The UNT Digital Library
Dissonance in Relation to Discrepant Information and Anxiety
This thesis discusses dissonance and its relationship to discrepant information and anxiety.
Date:
June 1967
Creator:
Angerstein, Rawley R.
System:
The UNT Digital Library
A Method of Filming a Music and Fine Arts Program
In reviewing the events of the advances of science and technology of the past two decades one is struck by the magnificence of man's accomplishments. The first moon walk televised live in 1969, the widespread utilization of color television receivers, the educational uses of sophisticated audio-visual equipment such as overhead projectors, slide projection, sound tape recorders, close-circuit television and videotape and the almost omniscient usage of television, is ample evidence to demonstrate that the tools necessary to accomplish a task are readily accessible items in this age. We are introduced to new gadgets, innovations, and events (like the moon walk) at such a rapid pace that we have become more flexible and more receptive to change; so much so that at times many of us are even blase about nearly miraculous accomplishments.
Date:
June 1970
Creator:
Antahades, Mary Ella
System:
The UNT Digital Library
A Comparative Study of Three Groups of Intellectually Superior Students who have Completed Two or More Years of College
The purpose of this study was to compare the activities and achievements in college of a population of three groups of academically able students who participated in a high school honors program. The population consisted of (1) those who completed an honors program, (2) those who dropped out of an honors program, and (3) those who entered an honors program at a time later than the entry of the first two groups. This study was concerned with discovering distinguishing activities and achievements of the male and female members of the three groups through an analysis and comparison of data relative to the groups after their completion of two or more years of college.
Date:
June 1967
Creator:
Antoine, Hugh
System:
The UNT Digital Library
Study of B_s Mixing at the D-Zero Detector at Fermilab Using the Semi-leptonic Decay B_s -> D_s mu nu X
B{sub s}{sup 0} mixing studies provide a precision test of Charge-Parity violation in the Standard Model. A measurement of {Delta}m{sub s} constrains elements of the CKM quark rotation matrix [1], providing a probe of Standard Model Charge-Parity violation. This thesis describes a study of B{sub s}{sup 0} mixing in the semileptonic decay B{sub s}{sup 0} {yields} D{sub s}{sup -} {mu}{sup +}{nu}X, where D{sub s}{sup -} {yields} {phi}{pi}{sup -}, using data collected at the D-Zero detector at Fermi National Accelerator in Batavia, Illinois. Approximately 2.8 fb{sup -1} of data collected between April 2002 and August 2007 was used, covering the entirety of the Tevatron's RunIIa (April 2002 to March 2006) and part of RunIIb (March 2006-August 2007). Taggers using both opposite-side and same-side information were used to obtain the flavor information of the B{sub s}{sup 0} meson at production. The charge of the muon in the decay B{sub s}{sup 0} {yields} D{sub s}{sup -}{mu}{sup +}{nu}X was used to determine the flavor of the B{sub s}{sup 0} at decay. The B{sub d}{sup 0} mixing frequency, {Delta}m{sub d}, was measured to verify the analysis procedure. A log-likelihood calculation was performed, and a measurement of {Delta}m{sub s} was obtained. The final result was {Delta}m{sub …
Date:
June 1, 2008
Creator:
Anzelc, Meghan
System:
The UNT Digital Library
Structural Investigations of Surfaces and Orientation-SpecificPhenomena in Nanocrystals and Their Assemblies
Studies of colloidal nanocrystals and their assemblies are presented. Two of these studies concern the atomic-level structural characterization of the surfaces, interfaces, and interiors present in II-VI semiconductor nanorods. The third study investigates the crystallographic arrangement of cobalt nanocrystals in self-assembled aggregates. Crystallographically-aligned assemblies of colloidal CdSe nanorods are examined with linearly-polarized Se-EXAFS spectroscopy, which probes bonding along different directions in the nanorod. This orientation-specific probe is used, because it is expected that the presence of specific surfaces in a nanorod might cause bond relaxations specific to different crystallographic directions. Se-Se distances are found to be contracted along the long axis of the nanorod, while Cd-Se distances display no angular dependence, which is different from the bulk. Ab-initio density functional theory calculations upon CdSe nanowires indicate that relaxations on the rod surfaces cause these changes. ZnS/CdS-CdSe core-shell nanorods are studied with Se, Zn, Cd, and S X-ray absorption spectroscopy (XAS). It is hypothesized that there are two major factors influencing the core and shell structures of the nanorods: the large surface area-to-volume ratio, and epitaxial strain. The presence of the surface may induce bond rearrangements or relaxations to minimize surface energy; epitaxial strain might cause the core and shell lattices …
Date:
June 17, 2006
Creator:
Aruguete, Deborah Michiko
System:
The UNT Digital Library
The Complex Alpha Spectra of the Heavy Elements
None
Date:
June 1, 1953
Creator:
Asaro, F.
System:
The UNT Digital Library
A Study of the Low-Back Vowels and of Certain Diphthongs in the Speech of Selected Groups in Denton, Texas
American dialect studies have progressed rapidly within the last thirty years, but the progress seems to be concentrated within the Southern and New England areas of the United States. Though there have been studies made in other areas, they are sporadic, no work of any significance having yet been published. Texas, unfortunately, is one area of rich dialectal significance which has been neglected, with the exception of Oma Stanley's work on the dialect in East Texas. Even though that work is somewhat dated in many respects, few scholars have seen fit to undertake a revision of Stanley's work or a study of other areas of Texas which would be comparable to The Speech of East Texas. Several master's theses add to the small number of studies concerned with Texas dialects, notably Roy Elders' study of the stressed back vowels in the speech of Parker County, but such studies are also too few. The present investigation was undertaken for the purpose of adding to that collection of Texas dialect studies an examination of the low-back vowels in stressed syllables, of certain diphthongs in stressed syllables, and of the change in frequency of usage of those vowels and diphthongs, occurring within recent …
Date:
June 1962
Creator:
Askew, John Wesley
System:
The UNT Digital Library
The Effectiveness of Two Different Uses of an Autoinstructional Program to Teach the Use of the Air Force Fiscal Account Structure and Codes
The problem of the study was the effectiveness of three techniques to teach the instructional unit, "The Air Force Fiscal Account Structure and Codes." The techniques compared were (1) lecture-demonstration procedure supplemented with the eclectic programed textbook, (2) autoinstructional procedure using only the eclectic programed textbook, and (3) the conventional lecture-demonstration procedure.
Date:
June 1967
Creator:
Askins, Billy Earl
System:
The UNT Digital Library
A Measurement of the Exclusive Branching Fraction for B \to pi K at BaBar
None
Date:
June 11, 2013
Creator:
Aspinwall, L.
System:
The UNT Digital Library
THE THEORY AND IMPLEMENTATION OF SRT DIVISION. Report No. 230.
None
Date:
June 1, 1967
Creator:
Atkins, III, Daniel E
System:
The UNT Digital Library
A Study of the Phytoplankton Population of Lake Dallas
The limnological investigation of any body of water is undertaken in order to secure more accurate information concerning the factors which play an important role in fish production or sanitation. This study shows the qualitative and quantitative planktonic algae in Lake Dallas, for the year 1937-38.
Date:
June 1938
Creator:
Bagwell, Russell L.
System:
The UNT Digital Library