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An Investigation of the Perceptions of Christian Seminary Counseling Students Regarding Play Therapy (open access)

An Investigation of the Perceptions of Christian Seminary Counseling Students Regarding Play Therapy

The threefold purpose of this study was to assess the extent to which counseling seminary students' beliefs corresponded to the tenets of child-centered play therapy, the amount of training seminary counseling students received in the area of child counseling and play therapy, and the applicability of child-centered play therapy courses in seminary counselor education programs. The researcher pursued this purpose through administration of a survey instrument she developed. The instrument consisted of 22 demographic items and 23 5-point Likert scale items based on the tenets of child-centered play therapy. The sample was comprised of 206 seminary counseling students from 12 Christian seminaries across the United States: 155 female and 51 male participants ranging in age from 21 to 60 years old and including 5.3% African American, 3.9% Asian, 1.5% Biracial/Multiracial, 3.4% Hispanic, 83% White (Non-Hispanic), 2.4% Other. Multiple regression analysis was utilized to determine which demographic variables were significant predictors of respondents' beliefs regarding child-centered play therapy. Results indicated significance at p < .05 level. Specifically, respondents who reported feeling more prepared to counsel children reported beliefs more congruent with child-centered play therapy, and respondents from the Southwestern and Southeastern portions of the United States exhibited beliefs less congruent with …
Date: August 2010
Creator: Thacker, Andi
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Role of N-Acylethanolamines in Plant Defense Responses: Modulation by Pathogens and Commercial Antimicrobial Stressors (open access)

Role of N-Acylethanolamines in Plant Defense Responses: Modulation by Pathogens and Commercial Antimicrobial Stressors

N-acyl ethanolamines (NAEs) are a class of lipids recently recognized as signaling molecules which are controlled, in part, by their degradation by fatty acid amide hydrolase (FAAH). On the basis of previous studies indicating increased NAE levels in a tobacco cell suspension-xylanase elicitor exposure system and the availability of FAAH mutants, overexpressor and knockout (OE and KO) genotypes in Arabidopsis thaliana, further roles of NAEs in A. thaliana plant defense was investigated. The commonly occurring urban antimicrobial contaminant triclosan (TCS) has been shown to suppress lipid signaling associated with plant defense responses. Thus, a second objective of this study was to determine if TCS exposure specifically interferes with NAE levels. No changes in steady state NAE profiles in A. thaliana-Pseudomonas syringae pv. syringae and A. thaliana-flagellin (bacterial peptide, flg22) challenge systems were seen despite evidence that defense responses were activated in these systems. There was a significant drop in enoyl-ACP reductase (ENR) enzyme activity, which catalyzes the last step in the fatty acid biosynthesis pathway in plants, on exposure of the seedlings to TCS at 10 ppm for 24 h and decreased reactive oxygen species (ROS) production due to flg22 in long term exposure of 0.1 ppm and short term …
Date: August 2010
Creator: Vadapalli, Vatsala
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Aesthetic and Technical Analysis on Soar! (open access)

Aesthetic and Technical Analysis on Soar!

Soar! is a musical composition written for wind ensemble and computer music. The total duration of the work is approximately 10 minutes. Flocking behavior of migratory birds serves as the most prominent influence on the imagery and local structure of the composition. The cyclical nature of the birds' journey inspires palindromic designs in the temporal domain. Aesthetically, Soar! portrays the fluid shapes of the flocks with numerous grains in the sounds. This effect is achieved by giving individual parts high degree of independence, especially in regards to rhythm. Technically, Soar! explores various interactions among instrumental lines in a wind ensemble, constructs overarching symmetrical structures, and integrates a large ensemble with computer music. The conductor acts as the leader at several improvisational moments in Soar! The use of conductor-initiated musical events in the piece can be traced back through the historic lineage of aleatoric compositions since the middle of the twentieth century. [Score is on p. 54-92.]
Date: August 2010
Creator: Wang, Hsiao-Lan
Object Type: Thesis or Dissertation
System: The UNT Digital Library
DNA Degradation as an Indicator of Post-Mortem Interval (open access)

DNA Degradation as an Indicator of Post-Mortem Interval

The question of post-mortem interval (PMI) or time since death is often the most sought after piece of information associated with a medical death investigation. Based on the observation that DNA degradation disproportionately affects the analysis of larger genetic loci, it was proposed that DNA degradation, as a result of autolysis or putrefaction, could prove suitable as a potential rate-of-change indicator of PMI. Nine randomly amplified polymorphic DNA (RAPD) analysis primers and three sets of directed amplification primers were evaluated to determine their suitability for use in assessing the degree of DNA fragmentation in tissue samples. They were assessed for amplicon specificity, total DNA target sensitivity, allele monomorphism and the observance of degradation-based profile changes. Markers meeting the requisite criteria were then used to assess a range samples degraded under controlled and uncontrolled conditions. Tissue samples collected from seven domestic pigs (Sus scrofa) were incubated under controlled laboratory or uncontrolled field conditions to produce samples simulating those potentially collected in a forensic case. DNA samples isolated from these specimens were then analyzed at those loci which had been determined to meet the requisite criteria. Collectively, data generated from these analyses indicate that genetic profiles generated by this approach can provide …
Date: August 2010
Creator: Watson, William H.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Middle School Students in Virtual Learning Environments (open access)

Middle School Students in Virtual Learning Environments

This ethnographic study examined middle school students engaged in a virtual learning environment used in concert with face-to-face instruction in order to complete a collaborative research project. Thirty-eight students from three eighth grade classes participated in this study where data were collected through observation of student work within the virtual learning environment, an online survey, and focus group sessions with students involved in the project. Results indicated students found the virtual learning environment to be valuable as a platform to complete a collaborative research assignment because of portability, ease of use, and organization. Embedded resources within the environment were helpful because of the convenience. Other people, including peers and teachers, were the preferred source of help when problems navigating the environment or finding information arose. Students communicated within the virtual learning environment as a social outlet, a way to check in, and a means to offer content related comments. Ideally the study's findings will give insight into student experiences in a virtual learning environment in order to help educators design more effective learning experiences and incorporate useful supports within such environments.
Date: August 2010
Creator: Wyatt, Erin Drankwalter
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Cold-Formed Steel Bolted Connections Using Oversized and Slotted Holes without Washers (open access)

Cold-Formed Steel Bolted Connections Using Oversized and Slotted Holes without Washers

In cold-formed steel (CFS) construction, bolted connections without washers for either oversized or slotted holes may significantly expedite the installation process and lower the cost. However, the North American Specification (AISI S100, 2007) for the Design of Cold-Formed Steel Structural Members requires washers to be installed in bolted connections with oversized or slotted holes. A research project (Phase 1) sponsored by American Iron and Steel Institute (AISI) was recently completed at the University of North Texas (UNT) that investigated the performance and strength of bolted CFS connections with oversized and slotted holes without using washers. The research presented in this thesis is the Phase 2 project in which the bolted CFS connections were studied in a broader respect in terms of the failure mechanism, the material thickness, and the hole configurations. Single shear and double shear connections without washers using oversized holes, oversized combined with standard or slotted holes were experimentally examined. Combined with Phase 1 results, the Phase 2 gives a comprehensive evaluation of the behavior and strength of bolted CFS connections with oversized and slotted holes without using washers. Revisions to the existing AISI North American Specification requirements for bolted connections are proposed to account for the reduction …
Date: August 2010
Creator: Xu, Ke
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Ecological Sustainability and Peace: The Effect of Ecological Sustainability on Interstate and Intrastate Environmental Conflict (open access)

Ecological Sustainability and Peace: The Effect of Ecological Sustainability on Interstate and Intrastate Environmental Conflict

This study examines the relationship between ecological sustainability and violent conflict at both the interstate and intrastate level. In particular, this study explores the effect of ecological sustainability of a society on the initiation and the occurrence of violent conflict. By developing a theory, which is named "Eco-peace," this study hypothesizes that the more ecologically sustainable the socioeconomic system of societies, the less likely the society is to initiate interstate conflict. Regarding intrastate conflict, it is hypothesized that the more ecologically sustainable the mode of development pursued by the Third World society is, the more likely that society is to experience intrastate conflicts. To test the hypotheses, this study conducts cross-national time-series analyses for 97-127 countries. Negative binomial and Poisson models are used for interstate conflict during 1960-2001, and logit and rare event logit models are used for intrastate conflict during 1960-1999. Militarized interstate dispute dataset and Uppsala Armed Conflict Program dataset are employed for interstate and intrastate conflict. For ecological sustainability, Ecological sustainability factor index and Environmental sustainability index are used. Through the analyses, this study found the supports for the theoretical argument that the ecologically unsustainable modes of development cause the initiation of interstate conflict and the incidence …
Date: August 2010
Creator: Yoon, Jong-Han
Object Type: Thesis or Dissertation
System: The UNT Digital Library
A Collaborative Affair: The Building of Museum and School Partnerships (open access)

A Collaborative Affair: The Building of Museum and School Partnerships

This study examined two art museum and school partnerships in order to learn how partnerships enable an integration of goals, participants' beliefs and values, and learning objectives. This study examined the partnerships through a social constructivist lens and used narrative analysis as way to interpret participants' stories about collaboration. The research found three major themes among participants' stories. Participants: a) valued good communication to establish relationships between partners, b) believed partnership offered students experiences that educated the whole person, and c) felt that students making meaning by interacting in the museum environment was an indicator of success. The study closes with discussion of the researchers' own constructions as they developed throughout the study.
Date: August 2010
Creator: Yount, Katherine
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Socioscope: Human Relationship and Behavior Analysis in Mobile Social Networks (open access)

Socioscope: Human Relationship and Behavior Analysis in Mobile Social Networks

The widely used mobile phone, as well as its related technologies had opened opportunities for a complete change on how people interact and build relationship across geographic and time considerations. The convenience of instant communication by mobile phones that broke the barrier of space and time is evidently the key motivational point on why such technologies so important in people's life and daily activities. Mobile phones have become the most popular communication tools. Mobile phone technology is apparently changing our relationship to each other in our work and lives. The impact of new technologies on people's lives in social spaces gives us the chance to rethink the possibilities of technologies in social interaction. Accordingly, mobile phones are basically changing social relations in ways that are intricate to measure with any precision. In this dissertation I propose a socioscope model for social network, relationship and human behavior analysis based on mobile phone call detail records. Because of the diversities and complexities of human social behavior, one technique cannot detect different features of human social behaviors. Therefore I use multiple probability and statistical methods for quantifying social groups, relationships and communication patterns, for predicting social tie strengths and for detecting human behavior …
Date: August 2010
Creator: Zhang, Huiqi
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Differences Among Abused and Nonabused Younger and Older Adults as Measured by the Hand Test (open access)

Differences Among Abused and Nonabused Younger and Older Adults as Measured by the Hand Test

The purpose of this study was to explore the effects of participants' abused or nonabused status as it interacted with their age and gender in producing different patterns of Hand Test responses as a function of the age or gender of the card. Participants, 61 young adults (M age = 23) and 60 older adults (M age = 73), were presented with the original Hand Test cards, as well as four alternate versions (e.g., young male, young female, older male, and older female). Expected effects varying by age, gender, and abuse status were not found. Results indicated main effects for participant abuse status, which were largely consistent with previous Hand Test research. Significant interaction effects were also found for participant age by participant abuse status (p < .05), as well as participant age by participant gender by participant abuse status (p < .05). An interaction effect was also found for Hand Test version by participant abuse status (p < .05), Hand Test version by participant age by participant abuse status (p < .05), as well as Hand Test version by participant gender by participant abuse status (p < .05). These results suggest that the alternate forms of the cards may …
Date: August 2010
Creator: Sergio, Jessica A.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Sex and Older Americans: Exploring the Relationship Between Frequency of Sexual Activity and Happiness (open access)

Sex and Older Americans: Exploring the Relationship Between Frequency of Sexual Activity and Happiness

The purpose of this study is two-fold: (1) to examine the correlation between frequency of sexual activity and general happiness among older Americans and (2) to examine the correlation between frequency of sexual activity and marital happiness among older married Americans. This study employed quantitative data drawn from the 2004-2008 General Social Surveys. Two samples were used. The first sample included all respondents 65 years of age and older with valid responses for the dependent, independent, and control variables. The second sample was a subset of the first and included only the married respondents. Both bivariate cross-tabulations and binary logistic regression analyses were conducted. As expected, the data support a positive association between sexual activity and general happiness in both the total elder sample and the married elder sample (p < 0.05). Also, as expected, the data support a positive association between frequency of sexual activity and marital happiness in the married elder sample (p < 0.05). Even with the introduction of control variables, frequency of sexual activity was found to be a significant predictor of both general and marital happiness (p < 0.05). This study suggests that sexual activity does indeed contribute the happiness and well-being of older Americans.
Date: August 2010
Creator: Jackson, Adrienne
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Service Matters: The Influence of Military Service on Political Behavior, Ideology and Attitudes (open access)

Service Matters: The Influence of Military Service on Political Behavior, Ideology and Attitudes

The objective of this research is to explore the influence of military service on political behaviors and attitudes. Existing studies of the military have long recognized the existence of a predominantly conservative political ideology with a resulting propensity for strong Republican Party support within the military community, but have failed to explain the likely causal mechanism for this. Drawing on multiple sources of data from the 2008 Presidential election cycle, I utilized a descriptive analysis of campaign contribution data and bivariate and multivariate analyses of data from the 2008 Military Times Survey and the 2008 American National Election Survey. Much of the data also permitted me to analyze the effect of an individual's service branch on their attitudes as well. I examined the behavior and attitudes of the military across several dimensions, including candidate support and positions on policies of particular relevance to the military, including the wars in Iraq and Afghanistan. This analysis found that people who serve in the military tend to be conservative but in many ways their political attitudes are reflective of those of the general population. An individual's race, ethnicity and gender appear to have more influence than military factors, with the exception of service …
Date: August 2010
Creator: Johnson, Catherine L.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Rhythms of Interaction in Global Software Development Teams (open access)

Rhythms of Interaction in Global Software Development Teams

Researchers have speculated that global software teams have activity patterns that are dictated by work-place schedules or a client's need. Similar patterns have been suggested for individuals enrolled in distant learning projects that require students to post feedback in response to questions or assignments. Researchers tend to accept the notion that students' temporal patterns adjust to academic or social calendars and are a result of choices made within these constraints. Although there is some evidence that culture do have an impact on communication activity behavior, there is not a clear how each of these factors may relate to work done in online groups. This particular study represents a new approach to studying student-group communication activities and also pursues an alternative approach by using activity data from students participating in a global software development project to generate a variety of complex measures that capture patterns about when students work. Students work habits are also often determined by where they live and what they are working on. Moreover, students tend to work on group projects in cycles, which correspond to a start, middle, and end time period. Knowledge obtained from this study should provide insight into current empirical research on global software …
Date: August 2010
Creator: Kesavan Nair Meena, Suneetha Nair
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Self-Objectification, Body Image, Eating Behaviors, and Exercise Dependence among College Females (open access)

Self-Objectification, Body Image, Eating Behaviors, and Exercise Dependence among College Females

The purposes of this study were to examine the associations between (a) self-objectification, (b) body shame, (c) appearance anxiety, and (d) exercise dependence. Participants (N = 155) completed a demographic questionnaire and a survey packet including the Body Surveillance subscale and Body Shame subscale of the Objectified Body Consciousness Scale, Appearance Anxiety Scale, Eating Attitudes Test 26, and the Exercise Dependence Scale. Correlations were conducted revealing associations between self-objectification, body shame, appearance anxiety, and eating attitudes. Associations were also found between body shame and exercise dependence. Partial correlations were conducting revealing body shame and appearance anxiety mediated the relationship between self-objectification and eating attitudes. Body shame also mediated the relationship between self-objectification and exercise dependence.
Date: August 2010
Creator: Kessler, Kelly L.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Polystylistic Features of Schnittke's Cello Sonata (1978) (open access)

Polystylistic Features of Schnittke's Cello Sonata (1978)

Polystylism in Alfred Schnittke's music has been considered by scholars as a central aspect of his music. Although there are many published analyses of his choral music, symphonies, concerti and violin sonatas, there is no known published research for Schnittke's first cello sonata. Alfred Schnittke grew up in a culturally diverse environment influenced by many different composers and compositional styles under the restrictions of a communist Russian government. These aspects influenced the development of Schnittke's polystylism, characteristically represented by his Cello Sonata (1978). The detailed musical analysis of this sonata in this study serves the purpose to reveal Schnittke's polystylistic tendencies and his use of cyclic elements. These polystylistic elements in the sonata illustrate how Schnittke de-familiarizes listeners from rules commonly accepted as unavoidable and re-familiarizes listeners with the expressive qualities of tonal, twelve-tone and atonal music. Although Schnittke introduces polystylistic materials in de-familiarized contexts in this sonata, this study finds that Schnittke particularly re-familiarizes the audience's musical and stylistic perception through the reappearance of sections, textures and motifs. Abrupt polystylistic conflicts contrast with the repetition of previous materials, thereby forming a combination of traditional styles with features of discontinuity in 20th century music.
Date: August 2010
Creator: Kleinmann, Johannes
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Developing an Integrated Supply Chain Costing Approach for Strategic Decision Making (open access)

Developing an Integrated Supply Chain Costing Approach for Strategic Decision Making

The supply chain management discipline suggests that information sharing is paramount when attempting to achieve cost reductions and quality improvements. In many cases, the traditional accounting data used to support strategic decisions reflect inaccurate supply chain costs. This research explores the applications of managerial costing techniques, and how they can be used to improve the decision making capabilities of firms in the aerospace and transportation industries. The methodology used to address the research questions consisted of a hybrid of the grounded theory and multiple-case study methods. The objective of this research was to present the antecedents and barriers associated with implementing supply chain costing, and the impact that costing approaches have on strategic decision making. The research identifies a theoretical model that can be used to explain the relationships and themes associated with supply chain costing and strategic decision making. Evidence suggests that there is some movement to implement managerial accounting techniques within these two industries to capture supply chain costing information. However, the reliance on traditional financial accounting suggests that the overarching principles of supply chain management and information sharing amongst of partner firms has yet to be realized.
Date: August 2010
Creator: Knipper, Michael E.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Generation Y Attitudes toward Mobile Advertising: Impacts of Modality and Culture (open access)

Generation Y Attitudes toward Mobile Advertising: Impacts of Modality and Culture

Mobile phone usage has grown rapidly and is widely used as an advertising channel. Both short message service (SMS) and multimedia messaging service (MMS) are typically used for mobile advertising. The goals of this study are to examine the determinants of attitudes toward mobile advertising in an apparel context and subsequent impact on behavior intention and to investigate the effects of modality and culture on attitudes toward apparel mobile advertising. Results indicate that entertainment, informativeness, irritation, and credibility are determinants of attitudes toward apparel mobile advertising, and attitudes can explain behavioral intention at least in part. Perceived entertainment is different between SMS and MMS apparel mobile advertising, and perceived entertainment, informativeness, irritation, and credibility are different between U.S. and Korea participants.
Date: August 2010
Creator: Koo, Wanmo
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Regulation and Political Costs in the Oil and Gas Industry: An Investigation of Discretion in Reporting Earnings and Oil and Gas Reserves Estimates (open access)

Regulation and Political Costs in the Oil and Gas Industry: An Investigation of Discretion in Reporting Earnings and Oil and Gas Reserves Estimates

This study investigates the use of discretion by oil and gas companies in reporting financial performance and oil and gas reserve estimates during times of high political scrutiny resulting from increases in energy prices. Hypotheses tested in prior literature state that companies facing the risk of increasing taxes or new regulations reduce reported earnings to reduce this risk. This study uses a measure of high profitability (rank order of return on assets relative to industry peers) to identify oil and gas companies more likely to manage earnings during the period from 2002 to 2008. Two measures of discretionary accruals (total and current discretionary accruals), and a measure of discretionary depreciation, depletion, and amortization (DDA) were used as indicators of discretion exercised in reporting earnings. Data on oil and gas reserve disclosures was also hand-collected from Forms 10-K to investigate whether managers use reserve estimate revisions to reduce reported earnings through increasing the annual depletion expense. Results suggest that both oil and gas refining and producing firms use negative discretionary accruals to reduce reported earnings. Results also indicate that profitability is an important determinant of the use of negative discretionary accruals by these companies regardless of the time period examined. There …
Date: August 2010
Creator: Kurdi, Ammr
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Device Engineering for Enhanced Efficiency from Platinum(II) Phosphorescent OLEDs (open access)

Device Engineering for Enhanced Efficiency from Platinum(II) Phosphorescent OLEDs

Phosphorescent organic light emitting diodes (PHOLEDs) based on efficient electrophosphorescent dopant, platinum(II)-pyridyltriazolate complex, bis[3,5-bis(2-pyridyl)-1,2,4-triazolato]platinum(II) (Pt(ptp)2) have been studied and improved with respect to power efficiency, external efficiency, chromacity and efficiency roll-off. By studying the electrical and optical behavior of the doped devices and functionality of the various constituent layers, devices with a maximum EQE of 20.8±0.2 % and power efficiency of 45.1±0.9 lm/W (77lm/W with luminaries) have been engineered. This improvement compares to devices whose emission initially could only be detected by a photomultiplier tube in a darkened environment. These devices consisted of a 65 % bis[3,5-bis(2-pyridyl)-1,2,4-triazolato]platinum(II) (Pt(ptp)2) doped into 4,4'-bis(carbazol-9-yl)triphenylamine (CBP) an EML layer, a hole transporting layer/electron blocker of 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC), an electron transport layer of 1,3,5-tris(phenyl-2-benzimidazolyl)-benzene (TPBI), and a LiF/Al cathode. These devices show the acceptable range for warm white light quadrants and qualify to be called "warm white" even w/o adding another emissive layer. Dual EML devices composed of neat Pt(ptp)2 films emitting orange and CBP: Pt(ptp)2 film emitting blue-green produced a color rendering index (CRI) of 59 and color coordinates (CIE) of (0.47,0.49) at 1000Cd/m² with power efficiency of 12.6±0.2 lm/W and EQE of 10.8±0.2 %. Devices with two blue fluorescent emission layers as singlet …
Date: August 2010
Creator: Li, Minghang
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Wind Energy-related Wildlife Impacts: Analysis and Potential Implications for Rare, Threatened and Endangered Species of Birds and Bats in Texas (open access)

Wind Energy-related Wildlife Impacts: Analysis and Potential Implications for Rare, Threatened and Endangered Species of Birds and Bats in Texas

Texas currently maintains the highest installed nameplate capacity and does not require publicly available post-construction monitoring studies that examine the impacts of wind energy production on surrounding fauna. This thesis examines potential wind energy impacts on avian and bat species in Texas through a three-part objective. The first two objectives synthesize literature on variables attractive to species within wind development areas and estimate impacted ranges outside of Texas, based on studies examining wind energy's environmental impacts. The third objective focuses on Texas wind development potential for interaction with rare, threatened and endangered species of birds and bats using GIS analysis with a potential hazard index (PHI) model, which addresses broad-spectrum, high risk variables examined within the first two objectives. Assuming areas with higher wind speeds have potential for wind development, PHI values were calculated for 31 avian and ten bat species, based on an analysis of species range data obtained from the Texas Parks and Wildlife Department and wind data obtained from the National Renewable Energy Laboratory. Results indicate one avian species, Tympanuchus pallidicinctus, is at high risk for wind development interaction on an annual basis, with 20 species of birds and nine species of bats at higher risk during …
Date: August 2010
Creator: Graham, Tara L.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Relationship Between Sleep Variables and Headache (open access)

The Relationship Between Sleep Variables and Headache

Headache pain impacts most of the population at some point in life, at an enormous cost to day-to-day functioning. Determination of the variables that are associated with prevalence and severity of headaches has been inconsistent. One area that deserves more attention is the relationship between headaches and sleep. For instance, several sleep parameters may precipitate or exacerbate headaches, but previous research often used inconsistent and limited assessments of both headaches and sleep, making results difficult to interpret and compare. The current study seeks to extend previous research by using more comprehensive and empirically validated assessment techniques to study the relationship between sleep and headaches in a healthy sample. Greater self-reported sleep quality is related to lower headache frequency and severity, and lower self-reported sleep quality is characteristic of individuals having migraine-type headaches. Greater sleep efficiency is related to lower headache severity and shorter headache duration. Greater sleep onset latency is related to longer headache duration and greater headache severity. Greater number of nighttime awakenings is related to greater headache severity and is characteristic of individuals having a diagnosable headache disorder (either tension-type or migraine-type). Stress appeared to be a partial mediator between self-reported sleep quality and headache severity. Further experimental …
Date: August 2010
Creator: Grieser, Emily Ann
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Relationships Among and Between Early and Late Freshmen Admission Applications and Academic Persistence (open access)

Relationships Among and Between Early and Late Freshmen Admission Applications and Academic Persistence

This quantitative study investigated relationships among and between university early and late admitted freshmen and academic performance and persistence. The participants in this study consisted of 3,197 early freshmen applicants and 309 late freshmen applicants admitted at a large southwestern student centered public research university over the course of the year prior to the fall 2008 academic year. Significant results, using a statistical significance level of p < .05, were reported for the majority of variables examined: chi-square analysis revealed a significant relationship between application date and ethnicity; independent-samples t-tests revealed significant differences in SAT scores; 78.06% of late applicants were male compared to 40.83% of early applicants; mean GPA of early applicants was 2.62 compared to 2.18 among those who applied late; and lastly, 76.62% of early applicants returned the following year in comparison to 57.42% of late applicants. The results of this study provide preliminary support for the examination of admission policies and procedures in relation to late application. Recommendations are made for advising, counseling, and other interventions that may ease the transition of freshmen late applicants while enhancing retention and persistence.
Date: August 2010
Creator: Hale, Lynne Rochelle
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Programming for Students with Emotional/Behavioral Disorders:  The Importance, Usage and Preparedness for Implementation of Evidence-Based Interventions Based on Practitioner Perceptions (open access)

Programming for Students with Emotional/Behavioral Disorders: The Importance, Usage and Preparedness for Implementation of Evidence-Based Interventions Based on Practitioner Perceptions

Implementation of evidence-based practices in Texas schools was examined through a survey disseminated through 495 special education directors in 20 state educational service centers. The district-level directors were asked to forward the survey to all personnel providing direct or indirect services to students with EBD. Survey participants were asked to rate 27 evidence-based interventions for students with EBD in three categories on a 5-point Likert scale: (a) importance of the intervention; (b) frequency of use of the intervention; and (c) preparedness to implement the intervention. With a response rate of 32% and representation from all 20 educational service center areas, data were analyzed through simple frequency statistics to determine that most respondents were public school special educators who had been in their current position for 5 years or less. They identified a climate that supports successful teaching and learning and clear rules/expectations as very important. They reported using procedures for the use of physical restraint most frequently, and being most well-prepared to implement clear rules/expectations. A canonical correlation analysis revealed an inverse relationship between importance ratings of tertiary level interventions and frequency of use and preparedness to implement primary level interventions which implies that while practitioners rate tertiary level interventions …
Date: August 2010
Creator: Hathcote, Andrea Raye Dubre
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Atomistic Studies of Point Defect Migration Rates in the Iron-Chromium System (open access)

Atomistic Studies of Point Defect Migration Rates in the Iron-Chromium System

Generation and migration of helium and other point defects under irradiation causes ferritic steels based on the Fe-Cr system to age and fail. This is motivation to study point defect migration and the He equation of state using atomistic simulations due to the steels' use in future reactors. A new potential for the Fe-Cr-He system developed by collaborators at the Lawrence Livermore National Laboratory was validated using published experimental data. The results for the He equation of state agree well with experimental data. The activation energies for the migration of He- and Fe-interstitials in varying compositions of Fe-Cr lattices agree well with prior work. This research did not find a strong correlation between lattice ordering and interstitial migration energy
Date: August 2010
Creator: Hetherly, Jeffery
Object Type: Thesis or Dissertation
System: The UNT Digital Library