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  Partner: UNT Libraries
 Collection: UNT Theses and Dissertations
Molecular Modeling Study of Oxidative Degradation of Polyperfluoroethers Catalyzed by Iron Fluoride Surfaces : An Extended Hückel Theory Approach

Molecular Modeling Study of Oxidative Degradation of Polyperfluoroethers Catalyzed by Iron Fluoride Surfaces : An Extended Hückel Theory Approach

Date: May 1995
Creator: Wang, Yanbin
Description: Extended Hückel methods are known to be a useful tool in understanding surface phenomena. Important quantities about atoms and chemical bonds can be obtained from this computationally simple method, although caution must be exercised in interpreting the results. Application of Extended Hückel calculations to large metal clusters reveals the role of d orbitals in solids. Basic ideas of constructing model compounds have been developed. Several model systems for surface chemisorption processes are constructed in order to understand the surface catalyzed oxidative degradation of polyperfluoroethers. The activation of oxygen molecules can be explained. The Lewis acid character of the iron fluoride surface can be predicted. Based on these results, mechanisms of the degradation processes are discussed.
Contributing Partner: UNT Libraries
Molecular Structure Analyses of Asymmetric Hydrocarbon Liquid Compounds in the Gas Phase Using Chirped-pulse Fourier Transform Microwave Spectroscopy: Acyl Chlorides and Perfluorinated Acyl Chlorides

Molecular Structure Analyses of Asymmetric Hydrocarbon Liquid Compounds in the Gas Phase Using Chirped-pulse Fourier Transform Microwave Spectroscopy: Acyl Chlorides and Perfluorinated Acyl Chlorides

Date: August 2011
Creator: Powoski, Robert A.
Description: Examinations of the effects of (a.) alkyl carbon chain length and (b.) perfluorination of acyl chlorides; propionyl chloride, butyryl chloride, valeroyl chloride, and perfluorinated acyl chlorides; perfluoropropionyl chloride and perfluorobutyryl chloride, are reported and compared using CP-FTMW spectroscopy. All of these molecules are already published in various journals except for valeroyl chloride. The chapters are organized by molecule alkyl chain length and include some background theory. Conformational stability, internal rotation, helicity, and ionic character of the C-Cl bond via the nuclear electric quadrupole coupling constant (χzz) are analyzed. Results show syn, syn-anti/syn-gauche, and syn-anti-anti/syn-gauche-anti stable conformations. Internal rotation was only seen in propionyl chloride. Helicity was not observed. (χzz) was observed to be inert to alkyl chain length, ~ 60 MHz and ~ 65 MHz for the nonfluorinated and fluorinated acyl chlorides. Partial fluorination and varying functional groups are recommended.
Contributing Partner: UNT Libraries
Molecular systematics of Baird's pocket gopher (Geomys breviceps)

Molecular systematics of Baird's pocket gopher (Geomys breviceps)

Date: August 2010
Creator: Bodine, Deanna Martinez
Description: Baird's pocket gopher (Geomys breviceps) is found in eastern Texas, eastern Oklahoma, central and western Arkansas, and western Louisiana. The cytochrome-b gene was sequenced and analyzed for 16 pocket gophers from throughout the range of the species. Similar phylogenetic trees were obtained using maximum-parsimony, maximum-likelihood, neighbor-joining, and Bayesian analyses. Two major clades were formed with northern individuals belonging to clade I and southern individuals belonging to clade II. G. b. sagittalis was paraphyletic in relation to G. b. breviceps in all analyses. Based on inconsistencies between the taxonomic classification and systematic relationships within Baird's pocket gopher, a taxonomic restructuring appears warranted.
Contributing Partner: UNT Libraries
Moments: a Diary

Moments: a Diary

Date: May 1998
Creator: Craig, Mendy J. (Mendy Jeneen)
Description: In my preface I have tried to show what a diary is, why they might be of interest to others, why I think they are valid and should be considered as such. I have defended my diary as being worthy material for a thesis, or myself as worthy of being called a writer. (Traditionally, writing in a diary doesn't qualify one as being a writer, even though you might write millions of pages and spend your entire lives doing it.) Edited selections of my diary make up the body of the thesis. These selections are divided into four main sections which suggested themselves during editing. To summarize the diary as a whole, I would say it's about human relationships.
Contributing Partner: UNT Libraries
Monaural and Binaural Speech Reception Thresholds in Normal Children and Those at Risk for Central Auditory Processing Disorders

Monaural and Binaural Speech Reception Thresholds in Normal Children and Those at Risk for Central Auditory Processing Disorders

Date: August 1997
Creator: Robinson, Shirley R. (Shirley Ruth)
Description: Children with central auditory processing disorders (CAPD) have a normal pure-tone audiogram, however, they have difficulty understanding speech in the presence of background noise. The present study examined binaural hearing in normal children and those with possible CAPD. Each subject was administered the SCAN or SCAN-A, screening tests for CAPD, to determine whether they were at risk for CAPD. Participants were then subjected to several monaural and binaural speech tasks, in quiet and noise. Spondee words were utilized in each task, under headphone and soundfield conditions.
Contributing Partner: UNT Libraries
Money in Four of the Early Novels of Henry James

Money in Four of the Early Novels of Henry James

Date: August 1966
Creator: Swearingen, Wilba Shaw
Description: The purpose of the study at hand is to follow up the suggestions in Winters's observations and Booth's thesis, and to examine both the extent and the nature of money and other financial considerations as these matters appear in the four most important novels of James's early period.
Contributing Partner: UNT Libraries
"Money Only Pays for It" and other stories.

"Money Only Pays for It" and other stories.

Date: August 2004
Creator: Edgington, Manford L.
Description: This thesis includes a novel of eight short stories and a critical preface. The preface begins with a section placing the stories in their literary historical context in regards to masculinity theory. It goes on to discuss the craft of fictionalizing autobiographical stories. Finally, the preface talks about the choice of a first person narrator. Each of the stories should stand alone, though they follow the narrator's life for a number of years. Todd Welles is the narrator of all the stories, with the exception of a few. In the stories where Todd does not do all of the narration, he is interrupted by the narration of his "friend," Percy 2 Hard Welles, III.
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Monitoring and Increasing Goal Related Instruction and Engagement in Groups of Children with Autism

Monitoring and Increasing Goal Related Instruction and Engagement in Groups of Children with Autism

Date: May 2012
Creator: Rossi, Kathleen Anne
Description: A high rate of instructional engagement is important to maximize progress in early intensive behavioral interventions (EIBI). Teachers responsible for eliciting instructional engagement may need additional support to maintain high rates of engagement. Literature suggests that goal setting and feedback is effective in increasing performance. the purpose of this study was to evaluate whether goal setting and group feedback would increase engagement in instructional activities related to the children’s goals. Results indicate that goal setting and group feedback was successful in increasing engagement in instructional activities. the results are discussed in the context of engagement, staff performance, group contingencies and performance feedback.
Contributing Partner: UNT Libraries
Monitoring or moral hazard? Evidence from real activities manipulation by venture-backed companies.

Monitoring or moral hazard? Evidence from real activities manipulation by venture-backed companies.

Date: December 2009
Creator: Liu, Xiang
Description: Prior literature suggests two competing theories regarding the role of venture capitalists (VCs) in their portfolio companies. The VC monitoring hypothesis argues that VCs effectively resolve the managerial agency problem through close monitoring and restraining managers' earnings management behavior. The VC moral hazard hypothesis argues that VCs aggravate the private benefits agency problem by exerting influence over managers to artificially inflate exit stock price through earnings management. Using a sample of IPO firms between 1987 and 2002, after controlling for the magnitude of accruals manipulation (AM), I compare the magnitude of real activities manipulation (RM) between venture-backed and non-venture-backed companies. I find that relative to non-venture-backed companies, venture-backed companies show significantly less RM in the first post-IPO fiscal year. The results are robust after controlling for the VC selection endogeneity. The finding supports the VC monitoring hypothesis that VCs restrain managers' RM behavior. Furthermore, I document that venture-backed companies exhibit a significant difference from non-venture-backed companies only in the first post-IPO fiscal year. The difference between the two groups in either the IPO year or the second post-IPO fiscal year is not significant, or at best, is weak. This finding is consistent with the argument that VCs tighten their control ...
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The Monomythic Pattern in Three Novels by D. H. Lawrence

The Monomythic Pattern in Three Novels by D. H. Lawrence

Date: August 1968
Creator: Hoffmann, Dorothy A.
Description: Sons and Lovers, The Rainbow, and Women in Love present sequentially in fictional version Lawrence's own personal journey into self-discovery in the form of a creation myth of sensual love which repeats the archetypal patterns of some of the great mythologies. It is the purpose of the following pages to show how these three novels reveal the major archetypal patterns of mythology as suggested by Joseph Campbell in his study, The Hero with A Thousand Faces.
Contributing Partner: UNT Libraries