21,382 Matching Results

Search Results

prev Results: 49 - 72 next
open access

Processing and Characterization of Polycarbonate Foams with Supercritical Co2 and 5-Phenyl-1H-tetrazole

Description: Since their discovery in the 1930s, polymeric foams have been widely used in the industry for a variety of applications such as acoustical and thermal insulation, filters, absorbents etc. The reason for this ascending trend can be attributed to factors such as cost, ease of processing and a high strength to weight ratio compared to non-foamed polymers. The purpose of this project was to develop an “indestructible” material made of polycarbonate (PC) for industrial applications. Due to the high … more
Date: May 2015
Creator: Cloarec, Thomas
Partner: UNT Libraries
open access

Michael Tippett's piano sonata No. 1: A study of his eclectic approach to the sonata form in the twentieth century, and three recitals with works by Beethoven, Bartok, Bach/Busoni, Schumann, Mozart, Ginastera, Barber, and Chopin

Description: The intent of this dissertation is to investigate Michael Tippett's eclectic approach to the sonata form in the twentieth century as demonstrated in his Sonata No. 1. Topics of discussion include historical background of English music, particularly the English piano sonata, at the turn of the century (chapter 1), biographical information and a general overview of Tippett's music (chapter 2), a brief examination of Tippett's Sonata Nos. 2, 3, and 4 (chapter 3) and a formal analysis of Sonata No.… more
Date: May 1999
Creator: Kwak, Stacy (Stacy Joo Yeon)
Partner: UNT Libraries
open access

A Technical and Historical Analysis of Alban Berg's Sonata for Piano, op. 1

Description: This sonata by Alban Berg is a product of Arnold Schoenberg's teachings and is, indeed, a musical reflection of the Schoenberg of 1907-1908. At this time the musical thought of Schoenberg himself was in a state of metamorphosis, developing from the chromaticism of the late Romantic composers toward the twelve-tone technique which he was to formulate a few years later. The sonata, as a whole and above all, reflects the growth of an important composer, one who is perhaps the most important link b… more
Date: August 1962
Creator: Evans, Billy G., 1938-
Partner: UNT Libraries
open access

Increasing Telecommunications Channel Capacity: Impacts on Firm Profitability

Description: In calling for the deployment of high-capacity telecommunications infrastructures, the Clinton Administration is relying on market forces to drive demand toward self-sustaining development. There is little doubt that many firms will embrace the new telecommunications services for a variety of reasons including market differentiation, vertical market integration, and other organization-specific factors. However, there is little evidence at the firm level that adopting the use of increased-capaci… more
Date: August 1997
Creator: Clower, Terry L.
Partner: UNT Libraries
open access

Effect of Acute Alcohol Ingestion on Resistance Exercise Induced mTORC1 Signaling in Human Muscle

Description: The purpose of this project was to further elucidate the effects post-exercise alcohol ingestion. This project had many novel aspects including using a resistance exercise (RE) only exercise design and the inclusion of women. To our knowledge, we are the first to investigate the effect of post-RE alcohol ingestion in women. In the first chapter of this project, information on the prevalence of alcohol use and the importance of skeletal muscle as a dynamic and metabolic tissue was provided. In c… more
Date: August 2015
Creator: Duplanty, Anthony A.
Partner: UNT Libraries
open access

Forward Genetic Characterization of Medicago truncatula Tnt1 Insertion Mutants Defective in Nodule Development and Symbiotic Nitrogen Fixation

Description: Legumes are unique plants because they form special structures “nodules”, via symbiotic relationships with rhizobial bacteria present in the soil. Once rhizobia mature inside nodules, they fix atmospheric nitrogen providing a source of bioavailable nitrogen to the plant. To discover novel genetic components involved in the legume-rhizobia symbiosis by using forward genetic screening, we have isolated Medicago truncatula Tnt1 insertion mutants in the R108 ecotype, which are defective in nodule d… more
Date: May 2015
Creator: Kadel, Khem L.
Partner: UNT Libraries
open access

A Study of Anomalous Conduction in n-Type Amorphous Silicon and Correlations in Conductivity and Noise in Gold Nanoparticle-Ligand Arrays

Description: This work explores two very different structural systems: n-type hydrogenated amorphous silicon (a-Si:H) and gold nanoparticles (AuNPs) suspended in a matrix of organic ligands. For a-Si:H, examination of the gas-phase concentration of dopant (1-6% PH3/SiH4) and argon diluent effects includes the temperature dependent conductivity, low-frequency electronic noise, and Raman spectroscopy to examine structure. It is found that a-Si:H samples grown with high dopant concentration or with argon dilut… more
Date: August 2021
Creator: Western, Brianna J
Partner: UNT Libraries
open access

The Effects of Selective Serotonin Reuptake Inhibitors (Ssri) on Auditory Measures in Clinically Depressed Subjects.

Description: The purpose of this study was to investigate the relationship between selective serotonin reuptake inhibitor (SSRI) medication on auditory skills in clinically depressed subjects. Experimental subjects prescribed an SSRI were tested in a medicated and an unmedicated condition, and the test results were compared. Furthermore, the experimental group was compared with a control group consisting of normal subjects. Test measures included pure tone audiometry, tympanometry, acoustic reflex threshold… more
Date: May 2002
Creator: Goodale, Elizabeth S.
Partner: UNT Libraries
open access

Amine Derivatives of 3-chloro-5(8?)-nitro-1,4-naphthoquinone

Description: This work deals with the preparation of amine derivatives of 3-chloro-5(8?)-nitro-1,4-naphthoquinone which are to be tested for anti-tubercular activity by Parke, Davis and Company.
Date: August 1952
Creator: Whitaker, Leroy, 1929-
Partner: UNT Libraries

Medicago truncatula NPF1.7: Structure-Function Assessment and Potential as a Phytohormone Transporter

Description: In Medicago truncatula, the MtNPF1.7 transporter has been shown to be essential for root morphology and nodulation development. The allelic MtNPF1.7 mutants, Mtnip-1 (A497V), Mtnip-3 (E171K), and Mtlatd (W341STOP), show altered lateral root growth and compromised legume-rhizobium symbiosis. To assess the role of a series of distinct amino acids in the transporter's function, in silico structural predictions were combined with in planta complementation of the severely defective Mtnip-1 mutant pl… more
Date: December 2022
Creator: Yu, Yao Chuan
Partner: UNT Libraries

Regulation of Receptors in Neuronal Cilia with Development, Seizures, and Knockouts: Implications for Excitability

Description: Neurons commonly have a primary cilium, which is a non-motile organelle extending from the centrosome into the extracellular space. In most brain regions, neuronal cilia are enriched in either somatostatin receptor type 3 (SstR3) or melanin concentrating hormone receptor type 1 (MCHR1), or both. The present immunohistochemical study provides novel evidence that primary cilia regulate neuronal excitability via G-protein coupled receptors (GPCRs), and that their identity is governed by brain re… more
This item is restricted from view until September 1, 2027.
Date: August 2022
Creator: Shrestha, Jessica
Partner: UNT Libraries
open access

Influence of Alice 3: Reducing the Hurdles to Success in a Cs1 Programming Course

Description: Learning the syntax, semantics, and concepts behind software engineering can be a challenging task for many individuals. This paper examines the Alice 3 software, a three-dimensional visual environment for teaching programming concepts, to determine if it is an effective tool for improving student achievement, raising self-efficacy, and engaging students. This study compares the similarities and differences between a Fundamentals of Programming course with and without Alice integrated into the … more
Date: May 2013
Creator: Daly, Tebring
Partner: UNT Libraries

Investigating the Mechanisms involved in Traffic-Generated Air Pollution: Mediated Disruption of the Blood-Brain Barrier in a Wild Type Mouse Model using a Pharmaceutical Intervention Approach

Description: This study investigated whether oxLDL and/or angiotensin (Ang) II signaling pathways mediate traffic-generated air pollution- exposure induced alterations in blood-brain barrier (BBB) integrity and permeability in a healthy wild type (C57Bl/6) mouse model; additionally, whether these outcomes are exacerbated by a high fat-diet investigated. An environmentally relevant concentration of a mixture of vehicle engine exhaust (MVE) was used. To investigate the hypotheses, 12 wk old male C57Bl/6 mice… more
Date: August 2020
Creator: Suwannasual, Usa
Partner: UNT Libraries
open access

A Descriptive Analysis of the Preludes (Book 1) of Claude Debussy

Description: The purpose of this thesis is to discuss and give a descriptive analysis of twelve of the twenty-four preludes written by Claude Debussy. This paper also includes a brief history of preludes as well as possible influences upon Debussy and his compositions.
Date: January 1956
Creator: Hudgins, Mary Nan
Partner: UNT Libraries

Identification and Characterization of Genes Required for Symbiotic Nitrogen Fixation in Medicago truncatula Tnt1 Insertion Mutants

Description: In this dissertation I am using M. truncatula as a model legume that forms indeterminate nodules with rhizobia under limited nitrogen conditions. I take advantage of an M. truncatula Tnt1 mutant population that provides a useful resource to uncover and characterize novel genes. Here, I focused on several objectives. First, I carried out forward and reverse genetic screening of M. truncatula Tnt1 mutant populations to uncover novel genes involved in symbiotic nitrogen fixation. Second, I focused… more
This item is restricted from view until August 1, 2028.
Date: July 2023
Creator: Cai, Jingya
Partner: UNT Libraries
open access

Lowell Liebermann's Concerto No. 1 for Piano and Orchestra, Opus 12: An Historical and Analytical Study

Description: Lowell Liebermann, born in New York City in 1961, is one of America's most distinguished living composers. In addition, he often conducts and performs as pianist in his own works. His musical language is unique and unmistakably rooted in the grand tradition of Western music; however, his style combines old and new, simple and complex, emotional and intellectual aspects. It combines tuneful, catchy melodies with a rich harmonic language, all framed by a strong formal design. This study begin… more
Date: May 2010
Creator: Chang, Hsiao-Ling
Partner: UNT Libraries
open access

The Keyboard Percussion Trios of Toru Takemitsu and Toshi Ichiyanagi, a Lecture Recital, together with Three Recitals of Selected Works of Cahn, Maslanka, Miki, Miyoshi, Ptaszynska, Schultz, Wesley-Smith, and Others

Description: The purpose of this study is to examine the various signatures of compositional style as manifested in the keyboard percussion trios Rain Tree by Toru Takemitsu and Wind Trace by Toshi Ichiyanagi. Significant personal interaction between the aforementioned Japanese composers and American composer John Cage justifies an investigation of his influence on their compositional styles. Toru Takemitsu is currently one of the most prolific Japanese composers. In 1981, Takemitsu composed the percussion … more
Date: August 1995
Creator: Finnie, Jimmy W. (Jimmy Wayne)
Partner: UNT Libraries
open access

Debussy's Use of the Motive in Thematic Construction as Found in "Images I" for Piano

Description: This study seeks to discover the extent and manner of Debussy's use of the motive in thematic material. A total of 40 melodic examples were analyzed in order to show their relationship to a single motive, a three-note figure having a step-leap relationship. Using eighty-four series of examples, the study shows the melodies analyzed to be 85% motive-derived. The study concludes, therefore, that Images I is a remarkably economical work, using a single three-note motive as a unifying and developme… more
Date: May 1977
Creator: Sheridan, John F.
Partner: UNT Libraries
open access

The Significance of Dmitri Shostakovich's Piano Sonata Op.12

Description: The aspiration of this dissertation is to bring forth the significance of Shostakovich's Piano Sonata Op.12. This sonata is a hybrid of the German musical tradition, Russian Modernism, and Liszt's thematic transformation technique. It demonstrates Shostakovich's highly intellectual compositional skills influenced by the education that he received at St. Petersburg Conservatory as well as the exposure to modern music in the 1920s. This dissertation discusses composition techniques, such as the h… more
Date: May 2007
Creator: Kan, Ling-Yu
Partner: UNT Libraries
open access

Language Choice in the ESL and FL Classrooms: Teachers and Students Speak Out

Description: This paper compares English as a second language (ESL) and foreign language (FL) teachers' and students' perspectives regarding target language (TL) and first language (L1) use in the respective classrooms. Teachers and students were given questionnaires asking their opinions of a rule that restricts students' L1 use. Questionnaires were administered to 46 ESL students, 43 FL students, 14 ESL teachers, and 15 FL teachers in Texas secondary public schools. Results were analyzed using SPSS and R.… more
Date: August 2006
Creator: Fernandez, Cody
Partner: UNT Libraries
open access

Ernesto García de León: A Study of Sonata No. I, Op. 13, Las Campanas (The Bells)

Description: The purpose of this document is to further the current research and encourage interest in the music of the Mexican composer Ernesto García de León. This paper will advance the current research with an in-depth analysis of the first movement of Sonata No. I, Op.13, Las Campanas (The Bells) for solo guitar. The analysis will focus on the pervasive presence of the melodic and harmonic intervals of perfect fourths, perfect fifths, and tritones as constructive devises throughout the sonata. This wi… more
Date: December 2008
Creator: Tercero, David R.
Partner: UNT Libraries
open access

Paul Wittgenstein's Transcriptions for Left Hand: Pianistic Techniques and Performance Problems : A Lecture Recital, Together with Three Recitals of Selected Works of R. Schumann, S. Prokofiev, F. Liszt, M. Ravel, and F. Chopin

Description: Paul Wittgenstein (1887-1961) made significant contributions to the piano literature for the left hand through numerous commissioned works as well as his own transcriptions. In the transcriptions, Wittgenstein preserved the texture of two-hand music, aiming for the simulation of the original works. This requires special techniques in the performance by the left hand alone. This dissertation investigations technical means and performance problems associated with the transcriptions as well as Wi… more
Date: August 1999
Creator: Kong, Won-Young
Partner: UNT Libraries
open access

A Statistical Study of the use of the "Mystic Chord" in the First Four Piano Sonatas of Alexander Scriabine

Description: The purpose of this paper is to discover the environmental characteristics of the "Mystic Chord" in the first four Sonatas for Piano by Alexander Scriabine. This paper explores the manner of approach, manner of resolution, harmonic function, position, melodic function, and rhythmic position of the "Mystic Chord".
Date: August 1974
Creator: Hallmark, Philip R.
Partner: UNT Libraries
Back to Top of Screen