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High-Temperature Corrosion of Aluminum Alloys: Oxide-Alloy Interactions and Sulfur Interface Chemistry (open access)

High-Temperature Corrosion of Aluminum Alloys: Oxide-Alloy Interactions and Sulfur Interface Chemistry

The spallation of aluminum, chromium, and iron oxide scales is a chronic problem that critically impacts technological applications like aerospace, power plant operation, catalysis, petrochemical industry, and the fabrication of composite materials. The presence of interfacial impurities, mainly sulfur, has been reported to accelerate spallation, thereby promoting the high-temperature corrosion of metals and alloys. The precise mechanism for sulfur-induced destruction of oxides, however, is ambiguous. The objective of the present research is to elucidate the microscopic mechanism for the high-temperature corrosion of aluminum alloys in the presence of sulfur. Auger electron spectroscopy (AES), low energy electron diffraction (LEED), and scanning tunneling microscopy (STM) studies were conducted under ultrahigh vacuum (UHV) conditions on oxidized sulfur-free and sulfur-modified Al/Fe and Ni3Al(111). Evaporative deposition of aluminum onto a sulfur-covered iron surface results in the insertion of aluminum between the sulfur adlayer and the substrate, producing an Fe-Al-S interface. Aluminum oxidation at 300 K is retarded in the presence of sulfur. Oxide destabilization, and the formation of metallic aluminum are observed at temperatures > 600 K when sulfur is located at the Al2O3-Fe interface, while the sulfur-free interface is stable up to 900 K. In contrast, the thermal stability (up to at least 1100 …
Date: December 2000
Creator: Addepalli, Swarnagowri
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Role of Intelligent Mobile Agents in Network Management and Routing (open access)

The Role of Intelligent Mobile Agents in Network Management and Routing

In this research, the application of intelligent mobile agents to the management of distributed network environments is investigated. Intelligent mobile agents are programs which can move about network systems in a deterministic manner in carrying their execution state. These agents can be considered an application of distributed artificial intelligence where the (usually small) agent code is moved to the data and executed locally. The mobile agent paradigm offers potential advantages over many conventional mechanisms which move (often large) data to the code, thereby wasting available network bandwidth. The performance of agents in network routing and knowledge acquisition has been investigated and simulated. A working mobile agent system has also been designed and implemented in JDK 1.2.
Date: December 2000
Creator: Balamuru, Vinay Gopal
Object Type: Thesis or Dissertation
System: The UNT Digital Library
A Behavioral Economic Analysis of Different Reinforcers: Sound-Clips Versus Points Exchangeable for Money (open access)

A Behavioral Economic Analysis of Different Reinforcers: Sound-Clips Versus Points Exchangeable for Money

Human operant studies frequently use points exchangeable for money as reinforcers. Some studies employ more immediately consumable reinforcers to emulate properties of food reinforcers. This study examined demand for points/money and for sound-clips to compare their economic characteristics. Across four participants, demand was often higher and less elastic for points/money than for sounds. During subsequent exposures at each response requirement, demand for sounds often decreased to a greater degree than demand for points/money. Thus, sound-clips seem less durable than points/money across prices and across repeated exposure to the same price. Response rates for points/money were often higher than for sounds, suggesting that reinforcers that generate higher response rates may be less elastic than reinforcers that generate lower response rates.
Date: December 2000
Creator: Alvey, Debi A.
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Parts of Women

Access: Use of this item is restricted to the UNT Community
Parts of Women contains a scholarly preface that discusses the woman's body both in fiction and in the experience of being a woman writer. The preface is followed by five original short stories. "Parts of Women" is a three-part story composed of three first-person monologues. "Controlled Burn" involves a woman anthropologist who discovers asbestos in her office. "Tango Lessons" is about a middle-aged woman who's always in search of her true self. "Expatriates" concerns a man who enters the lives of his Hare Krishna neighbors, and "Rio" involves a word-struck man in his attempt to form a personal relationship.
Date: May 2001
Creator: Murphy, Maria Christine
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Teen ages: Youth market romance in Hollywood teen films of the 1980s and 1990s

Access: Use of this item is restricted to the UNT Community
This thesis examines the differences between teen romantic comedy films marketed to Generation X teenagers in the 1980s and Generation Y teenagers in the 1990s, focusing on the presentation of gender roles, consumptive behavior, and family. The 1980s films are discussed within the social context of the Reagan era and the conservatism of the New Right. The 1990s films are examined as continuing a conservative sensibility, but they additionally posit consumption as instrumental to achieving an idealized romance. Romantic comedy is traditionally a conservative genre, but these films illustrate female liberation through consumption. The source of difference between the cycles of teen romantic comedy is attributed to the media's attempt to position Generation Y teenagers as ideal consumers.
Date: May 2001
Creator: Murphy, Caryn E.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Thematic Apperception Test: The relationship between scored fanasy aggression and aggressive behavior (open access)

The Thematic Apperception Test: The relationship between scored fanasy aggression and aggressive behavior

This study attempted to determine the relationship between fantasy aggression and behavioral aggression, and whether fantasy aggression measured by the Thematic Apperception Test is related to behavioral aggression. Participant TAT protocols from psychology clinic files were scored for fantasy aggression, and these scores were correlated with self-reported presence or absence of behavioral aggression. The scoring system used was a blend of popular aggression scales used in the 1960s and newer theory. Other variables that were examined were story length and gender in relation to the measured amount of fantasy and behavioral aggression.
Date: December 2000
Creator: Fabrick, Joanne Madeline
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Jules Massenet's Musical Prosody Focusing on His Eight Song Cycles And A Collection, Expressions Lyriques: A Lecture Recital, Together with Recitals of Selected Works of W. A. Mozart, F. Schubert, C. Debussy, R. Strauss, D. Argento, V. Bellini, J. Marx, W. Walton, C. Gounod, A. Scarlatti, G. Fauré, J. Rodrigo, H. Wolf, and Others (open access)

Jules Massenet's Musical Prosody Focusing on His Eight Song Cycles And A Collection, Expressions Lyriques: A Lecture Recital, Together with Recitals of Selected Works of W. A. Mozart, F. Schubert, C. Debussy, R. Strauss, D. Argento, V. Bellini, J. Marx, W. Walton, C. Gounod, A. Scarlatti, G. Fauré, J. Rodrigo, H. Wolf, and Others

Jules Massenet's mélodies feature a distinct vocal treatment regarding musical prosody through his eight song cycles, including Poëme d'Avril, Poëme Pastoral, Poëme du Souvenir, Poëme d'Amour, Poëme d'Hiver, Poëme d'un Soir, and Quelques Chansons Mauves, and a collection, Expressions Lyriques. These mélodies show the influence of the trend of salon music and the high-level poetry from the poetic movements of romanticism, Parnassianism, and symbolism. This study deals with Massenet's mélodies relating to the prosody idea, which is conspicuous in his vocal treatment. His melodic styles feature four distinct aspects of vocal treatment including lyrical, recitative or parlando, melodramatic, and déclamation rhythmée, and represent the idea of musical prosody of phonetic, syntactic, and semantic aspects. Massenet's other musical idioms such as harmony, form, and piano treatment, are also closely related to the prosody matter as a semantic aspect, reinforcing the poetic mood and content. In this study, each melodic style related to French versification is examined in detail. The musical analysis regarding the other musical idioms on selected examples presents the semantic feature of prosody idea. The brief review of French versification and opinions regarding the performance are included. Massenet's contribution to the genre of mélodie, with the prose melody and …
Date: December 2000
Creator: Chae, Eunhee
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Performance Improvement in an Accounting Firm: Comparing Operational and Financial Data Before and After Process Redesign (open access)

Performance Improvement in an Accounting Firm: Comparing Operational and Financial Data Before and After Process Redesign

The case study described in this thesis involves a process improvement project in the Tax Department of a Certified Public Accounting firm. A process map was created by interviewing employees involved in the process. A process analysis identified problems and possible solutions. The Partners in the firm decided to streamline the process for simple tax returns in order to make them more profitable. This study examined what impact, if any, the process improvement intervention had on key financial and operational measures. Results indicated that the tax returns prepared in the new process were faster, cheaper, and more profitable. This study indicates that organizations conducting process improvement interventions can beneficially affect key financial and operational measures.
Date: December 2000
Creator: Chhabra, Meeta Kaur
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Inequality in Access to, and Utilization of, Health Care - The Case of African American and Non-Hispanic White Males

Access: Use of this item is restricted to the UNT Community
Using data from the Household Component of the 1996 Medical Expenditure Panel Survey, the study compares (1) the accessibility, and (2) the predictors of health care services utilization among African American and non-Hispanic White males, 18 to 65 years old in the United States. Using ANOVA procedure in comparing the means for use of physicians, hospitals, doctors, and difficulty obtaining care, seven hypotheses were tested in the study. First, it was hypothesized that African American men of working age will have less access to health care services (physicians, hospitals, and dentists), and be more likely to report having experienced delay or difficulty obtaining care, compared to non-Hispanic white males of working age. Second, it was hypothesized that, controlling for health status, African American men of working age will have less access to health care services (physicians, hospitals, and dentists), and will also be more likely to experience delay or difficulty obtaining care, than non-Hispanic white males. This was followed by the third hypothesis which compared utilization of physicians, hospitals, dentists, and difficulty obtaining care among African American and non-Hispanic white males, controlling for health status and insurance coverage (any insurance, private insurance, any public insurance, and Medicaid). Hypotheses four through …
Date: May 2001
Creator: Sakyi-Addo, Isaac
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Analysis of the Impact of CACREP Accreditation of Counselor Education Programs on Student Knowledge Outcomes

Access: Use of this item is restricted to the UNT Community
The principal investigator (PI) for this study analyzed mean scores on the National Counselor Examination (NCE) of students from CACREP accredited and non- CACREP accredited programs. Data was provided by the National Board of Certified Counselors, Inc., for a total of ten examination administrations across six years. The fourteen variables examined in the study consisted of the eight common-core knowledge domains identified in CACREP standards, the five counselor work behavior areas identified by NBCC via periodic job analysis of counseling practice, and one overall or total score on the NCE. NCE mean scores of students from CACREP accredited programs were higher than NCE mean scores of students from non-CACREP accredited programs on all variables across all ten NCE administrations. Data seem to indicate that students from CACREP accredited programs perform significantly better on the NCE than students from non-CACREP accredited programs, in all fourteen variables. Sample size was large, totaling 9707, so the PI calculated effect sizes using Cohen's d for each variable to aid interpretation of statistical significance. Five variables had large effect sizes of .70 or higher. The higher effect size statistics were associated with the counselor work behavior areas, with the highest effect size (.85) associated with …
Date: May 2001
Creator: Scott, Susan W.
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Temporally Correct Algorithms for Transaction Concurrency Control in Distributed Databases

Access: Use of this item is restricted to the UNT Community
Many activities are comprised of temporally dependent events that must be executed in a specific chronological order. Supportive software applications must preserve these temporal dependencies. Whenever the processing of this type of an application includes transactions submitted to a database that is shared with other such applications, the transaction concurrency control mechanisms within the database must also preserve the temporal dependencies. A basis for preserving temporal dependencies is established by using (within the applications and databases) real-time timestamps to identify and order events and transactions. The use of optimistic approaches to transaction concurrency control can be undesirable in such situations, as they allow incorrect results for database read operations. Although the incorrectness is detected prior to transaction committal and the corresponding transaction(s) restarted, the impact on the application or entity that submitted the transaction can be too costly. Three transaction concurrency control algorithms are proposed in this dissertation. These algorithms are based on timestamp ordering, and are designed to preserve temporal dependencies existing among data-dependent transactions. The algorithms produce execution schedules that are equivalent to temporally ordered serial schedules, where the temporal order is established by the transactions' start times. The algorithms provide this equivalence while supporting currency to the …
Date: May 2001
Creator: Tuck, Terry W.
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Reflections on the Development of Children of Alcoholics

Access: Use of this item is restricted to the UNT Community
The specific purpose of this study was to try and understand why unique experiences of living with an alcoholic parent could create developmental deficits which emotionally challenge COAs' when faced with the life lessons a college environment offers. This study offered four possible explanations for experiencing challenges in its theoretical background: (1) psychosocial development, (2) the epistemology of alcoholism and its effects on the family, (3) personality development and the concurrence of building resilience, and (4) the college environment itself, with the phenomenon of binge drinking--forcing COAs to confront family alcoholism. A total of 7 participated in this study--4 men and 3 women. Despite the dynamic differences in the answers overall, all 7 participants acknowledged one important concept. When the participants were asked about their own drinking habits, each participant said, though in different ways, they had to be careful with their drinking habits. Participants seemed to be aware that whether alcoholism is genetic or a learned addiction, they were at risk of becoming alcoholics themselves. This study found overall, as previous literature suggests, no matter how COAs are studied, they are found to be a heterogeneous population. Specifically, this study's results points out that they are indeed heterogeneous, yet …
Date: May 2001
Creator: Weise, Molly Amanda
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Effects of Free Play As an Instructional Tool on the Quality of Improvisation of First, Second, and Third Grade Children (open access)

The Effects of Free Play As an Instructional Tool on the Quality of Improvisation of First, Second, and Third Grade Children

To look at the effect of free play on the musical improvisations of first, second and third grade children, 108 children were randomly assigned to either a control or treatment group. Subjects were tested using a researcher-designed instrument to elicit an improvisatory response. The control group then received regular music instruction (120 minutes every 2 weeks) and the treatment group received regular music instruction in conjunction with musical free play (100 minutes of instruction and 20 minutes of free play every 2 weeks). The treatment lasted 14 weeks. At the end of the treatment, all students were tested with the same testing instrument used for the pre test. Videotapes of the improvisations were submitted to three independent judges to rate for quality on a 5-point Likert scale. The change in ratings between pre and post tests were analyzed with an analysis of variance to determine if there were significant differences between the control and treatment groups. The analysis of the data revealed no significant difference in the change of ratings between control and treatment groups for the group as a whole, or for any particular grade level within the total group.
Date: December 2000
Creator: Burger, Tammie L.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Dark Houses: Navigating Space and Negotiating Silence in the Novels of Faulkner, Warren and Morrison (open access)

Dark Houses: Navigating Space and Negotiating Silence in the Novels of Faulkner, Warren and Morrison

Poe's "The Fall of the House of Usher," as early as 1839, reveals an uneasiness about the space of the house. Most literary scholars accept that this anxiety exists and causes some tension, since it seems antithetical to another dominant motif, that of the power of place and the home as sanctuary. My critical persona, like Poe's narrator in "The House of Usher," looks into a dark, silent tarn and shudders to see in it not only the reflection of the House of Usher, but perhaps the whole of what is "Southern" in Southern Literature. Many characters who inhabit the worlds of Southern stories also inhabit houses that, like the House of Usher, are built on the faulty foundation of an ideological system that divides the world into inside(r)/outside(r) and along numerous other binary lines. The task of constructing the self in spaces that house such ideologies poses a challenge to the characters in the works under consideration in this study, and their success in doing so is dependant on their ability to speak authentically in the language of silence and to dwell instead of to just inhabit interior spaces. In my reading of Faulkner and Warren, this ideology of …
Date: December 2000
Creator: Berger, Aimee E.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Effects of Biofeedback on Task Performance (open access)

The Effects of Biofeedback on Task Performance

This experiment attempted to study the effectiveness of biofeedback training on an individual's peak performance while performing a stress-provoking task. In a between subjects design 30 individual college students were divided into 2 groups. One group received auditory biofeedback and relaxation training, and the other group received no training. Both groups met the researcher for 1 hour a week for seven weeks. During each session the participant completed a ten-minute Competition and Coaction (C & C) computer software program (Shea, 1992). The biofeedback equipment recorded the physiological state of each of the participants while he/she performed the C & C task. Both groups' physiological values and C & C scores were compared using the SPSS software. The biofeedback group had statistically lower stress values than the non-biofeedback group (Schwartz, 1995). There was no statistical difference between the 2 groups' C & C scores. The STAI Y-1 and Y-2 anxiety inventories were given to each of the participants at the 1st and 7th session to examine the anxiety differences between the 2 groups. There were no statistical differences between the 2 groups' STAI scores. This study's findings show that individuals can be taught to lower their stress response while performing a …
Date: December 2000
Creator: Bruce, Kurt
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Preparation and Characterization of a Treated Montmorillonite Clay and Epoxy Nanocomposite (open access)

Preparation and Characterization of a Treated Montmorillonite Clay and Epoxy Nanocomposite

Montmorillonite reinforced polymers are a new development in the area of nanocomposite materials. Since reinforcement of epoxy is important to the development of high strength adhesives and composite matrices, the introduction of montmorillonite to epoxy is of interest. Compositional effects on epoxy reactivity, on molecular relaxation, and on mechanical properties were investigated. Change in reactivity was determined by Differential Scanning Calorimetry. Tensile properties at room temperature indicated improved modulus and retention of strength of the epoxy matrix but a decreased elongation to failure. Depression of dry nanocomposite glass transition was observed for nanocomposites beyond 5% by weight montmorillonite. Samples that were saturated with water showed lower moduli due to the epoxy matrix. The greatest moisture absorption rate was found at 7%, the least at 3%.
Date: December 2000
Creator: Butzloff, Peter Robert
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Unexpected Unexpected Utilities: A Comparative Case-Study Analysis of Women and Revolutions (open access)

Unexpected Unexpected Utilities: A Comparative Case-Study Analysis of Women and Revolutions

Women have been part of modern revolutions since the American Revolution against Great Britain. Most descriptions and analyses of revolution relegate women to a supporting role, or make no mention of women's involvement at all. This work differs from prior efforts in that it will explore one possible explanation for the successes of three revolutions based upon the levels of women's support for those revolutions. An analysis of the three cases (Ireland, Russia, and Nicaragua) suggests a series of hypotheses about women's participation in revolution and its importance to revolutions' success.
Date: December 2000
Creator: Casey, Walter Thomas
Object Type: Thesis or Dissertation
System: The UNT Digital Library

[Betterlight Panoramic of World War II Display]

Panoramic photograph of a World War II exhibit in the UNT Libraries' Rarebooks and Texana Collection.
Date: October 20, 2006
Creator: Phillips, Mark Edward & O'Connor, Mary K.
Object Type: Photograph
System: The UNT Digital Library
Establishment and Competitive Ability of Nelumbo Lutea in Relation to Myriophyllum Spicatum (open access)

Establishment and Competitive Ability of Nelumbo Lutea in Relation to Myriophyllum Spicatum

Limitations from reduced light and increasing water depth on Nelumbo lutea seedlings were determined in tank experiments. Survival was high in all tested light levels. Total biomass increased significantly with increasing light. Biomass allocation shifted significantly to root production between 3 and 6 weeks in the 10 and 24% levels. Survival decreased with increasing planting depth, and biomass of survivors reduced significantly between 0.5, 1.0, and 1.5 m depths. Nelumbo lutea and Myriophyllum spicatum populations were monitored for one season in a 0.7 ha pond to track changes in species dominance. Myriophyllum spicatum dominated early, and N. lutea dominated from July through October, suppressing M. spicatum at all depths. Competitive interactions between N. lutea and M. spicatum were investigated for two seasons in a container experiment situated within a pond. Where established, N. lutea dominated in the presence of M. spicatum. However, N. lutea could not be established in depths greater than 1 meter.
Date: December 2000
Creator: Snow, Joe R.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Comparative Analysis of Intensive Filial Therapy with Intensive Individual Play Therapy and Intensive Sibling Group Play Therapy with Child Witnesses of Domestic Violence (open access)

Comparative Analysis of Intensive Filial Therapy with Intensive Individual Play Therapy and Intensive Sibling Group Play Therapy with Child Witnesses of Domestic Violence

The purpose of this study was to determine the effectiveness of Intensive Filial Therapy in: (a) improving the self-concept of child witnesses of domestic violence; (b) reducing internalizing behavior problems, such as withdrawal, somatic complaints, anxiety and depression, of child witnesses of domestic violence; (c) reducing externalizing behavior problems, such as aggression and delinquency, of child witnesses of domestic violence; (d) reducing overall behavior problems of child witnesses of domestic violence; and (e) increasing communication of empathy between mothers and child witnesses of domestic violence. A second objective of this study was to compare the effectiveness of Intensive Filial Therapy with Intensive Individual Play Therapy and Intensive Sibling Group Play Therapy with child witnesses of domestic violence. The experimental group consisted of 11 child witnesses of domestic violence whose mothers received 12 Intensive Filial Therapy training sessions within a three week period and had 12 mother-child play sessions. The Intensive Individual Play Therapy comparison group, consisting of 11 child witnesses, and the non-treatment control group, consisting of 11 child witnesses, were utilized from the Kot (1995) study. The Intensive Sibling Group Play Therapy comparison group was utilized from the Tyndall-Lind (1999) study. Children in all studies completed the Joseph Preschool …
Date: December 2000
Creator: Smith, Nancy Renfer
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Effects of a Play Therapy Intervention Conducted by Trained High School Students on the Behavior of Maladjusted Young Children: Implications for School Counselors (open access)

The Effects of a Play Therapy Intervention Conducted by Trained High School Students on the Behavior of Maladjusted Young Children: Implications for School Counselors

This research study investigated the effectiveness of a child-centered play therapy intervention conducted by trained high school students on the behavior of preschool and kindergarten children with adjustment difficulties. Specifically, this research determined if play sessions conducted by high school students trained in child-centered play therapy skills and procedures facilitated change in the children's behaviors. The experimental group children (N=14) each received 20 weekly individual play sessions from a high school student enrolled in a Peer Assistance and Leadership class. The high school students were randomly paired with a referred child. The high school students completed 7 one-hour training sessions in child-centered play therapy procedures and skills prior to beginning the weekly, supervised play sessions. The control group (N=12) received no treatment during the study. Pre and post data were collected from parents who completed the Child Behavior Checklist (CBCL) and teachers who completed the Early Childhood Behavior Scale (ECBS). Multivariate analyses of variance of gained scored revealed statistical significance in 2 of the 4 hypotheses. Specifically, the children in the experimental group showed significant decreases in internalizing behaviors (p = .025) and total behaviors (p = .025) on the CBCL. Although not in the statistically significant range, positive trends …
Date: December 2000
Creator: Rhine, Tammy J.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
A Behavioral Economic Analysis of the Demand for Money in Humans (open access)

A Behavioral Economic Analysis of the Demand for Money in Humans

This study investigated the effects of unit price structure, unit price descriptions, and unit price sequence on the demand for money in humans. Six groups of 3 participants solved multiplication problems in exchange for money under various unit prices. Consumption of money decreased as the unit price increased across all conditions. However, the data also showed that: (a) fixed price structures produced slightly more elastic demand than did variable price structures, (b) price descriptions produced more elastic demand under variable price structures but had little or no effect under fixed price structures, and (c) the alternate sequence used with fixed price structures produced slightly more elastic demand.
Date: December 2000
Creator: Reyes, Jorge R.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Epoxy + Liquid Crystalline Epoxy Coreacted Networks (open access)

Epoxy + Liquid Crystalline Epoxy Coreacted Networks

Molecular reinforcement through in-situ polymerization of liquid crystalline epoxies (LCEs) and a non-liquid crystalline epoxy has been investigated. Three LCEs: diglycidyl ether of 4,4'-dihydroxybiphenol (DGE-DHBP) and digylcidyl ether of 4-hydroxyphenyl-4"-hydroxybiphenyl-4'-carboxylate (DGE-HHC), were synthesized and blended with diglycidyl ether of bisphenol F (DGEBP-F) and subsequently cured with anhydride and amine curing agents. Curing kinetics were determined using differential scanning calorimetry (DSC). Parameters for autocatalytic curing kinetics of both pure monomers and blended systems were determined. The extent of cure for both monomers was monitored by using Fourier transform infrared spectroscopy (FT-IR). The glass transitions were evaluated as a function of composition using DSC and dynamic mechanical analysis (DMA). The results show that the LC constituent affects the curing kinetics of the epoxy resin and that the systems are highly miscible. The effects of molecular reinforcement of DGEBP-F by DGE-DHBP and DGE-HHC were investigated. The concentration of the liquid crystalline moiety affects mechanical properties. Tensile, impact and fracture toughness tests results are evaluated. Scanning electron microscopy of the fracture surfaces shows changes in failure mechanisms compared to the pure components. Results indicate that mechanical properties of the blended samples are improved already at low concentration by weight of the LCE added into …
Date: December 2000
Creator: Punchaipetch, Prakaipetch
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Four Major Education GI Bills: A Historical Study of the Shifting National Purposes and Accompanying Changes in Economic Value to Veterans (open access)

The Four Major Education GI Bills: A Historical Study of the Shifting National Purposes and Accompanying Changes in Economic Value to Veterans

Benefits for soldiers follow the formation of ancient and present day armies raised for the purpose of extending the national or state will. Veterans' benefits for defenders of the U.S. emerged during the American colonial period. College benefits began after WWII with the GI Bill of Rights. This study examines the variations in purpose for nationally established educational benefits for veterans and the singular value to the veterans of these 5educational benefits. The study begins with an overview of the history of veterans' benefits. Primary emphasis is then placed on the educational portion of the World War II Servicemen's Readjustment Act and the current educational benefit, the Montgomery GI Bill. As the purpose of awarding educational benefits changed from World War II to the latest U.S. war, the Gulf War of 1990-1991, the economic value to the individual veteran also changed. The WWII GI Bill featured an educational provision intended to keep returning veterans out of the changing economy whereas current GI Bills is intended as a recruiting incentive for an all-volunteer force. Correspondingly, the economic value to the individual veteran has changed. Data supporting this study were extracted from historical documents in primary and secondary scholarly studies and writings, …
Date: December 2000
Creator: Spaulding, Donald James
Object Type: Thesis or Dissertation
System: The UNT Digital Library