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Assessment of Transportation Emissions for Ferrous Scrap Exports from the United States: Activity-Based Maritime Emissions Model and Theoretical Inland Transportation Model.

Description: Industrial ecology is a field of study that encourages the use of closed-loop material cycles to achieve sustainability. Loop closing requires the movement of materials over space, and has long been practiced in the iron and steel industry. Iron and steel (ferrous) scrap generated in the U.S. is increasingly exported to countries in Asia, lengthening the transportation distance associated with closing the loop on the iron and steel life cycle. In order to understand the environmental cost of transporting this commodity, an activity-based maritime transportation model and a theoretical in-land transportation model are used to estimate emissions generated. Results indicate that 10.4 mmt of total emissions were generated, and emissions increased by 136 percent from 2004 to 2009. Increases in the amount of emissions generated are due to increases in the amount of scrap exported and distance it is transported.
Date: December 2011
Creator: Caldwell, Amanda
Partner: UNT Libraries

ADHD Symptomology and Overweight Among College Men

Description: Attention deficit/hyperactivity disorder (ADHD) is a childhood disorder that often persists into adulthood. Among adults, ADHD is highly comorbid with addictive behaviors (e.g., substance abuse and dependence), and depressive disorders. Recently, an association between ADHD and obesity has been reported in the literature; emotional and binge eating may be “addictive behaviors” that contribute to weight gain in this population. The purpose of this study was to test competing models of the hypothesized link between ADHD symptomology and overweight. Specifically, in Model 1, symptoms of depression are expected to mediate the relationship between symptoms of impulsivity and inattention and emotional and binge eating which, in turn, leads to weight gain (i.e., increased BMI). In Model 2, however, the impulsive symptoms have direct relationships with emotional and binge eating in addition to being mediated by depressive symptoms. Structural equation modeling (SEM) was employed to test how the models fit the data of 790 college men. Both models fit the data well, with Model 2 being preferred because of its greater connection to theory. All paths were significant indicating that increased impulsive and inattentive symptoms predicted increased symptoms of depression that, in turn, predicted increased emotional/binge eating, which has a direct and positive relationship with increased BMI. Moreover, impulsive symptoms were also directly related to emotional/binge eating, suggesting different paths to overweight across ADHD subtypes. The findings of the current study elucidate the links between ADHD symptoms and overweight (i.e., increased BMI).
Date: December 2011
Creator: Johnson, Leslee M.
Partner: UNT Libraries

Effectiveness Of Group Activity Play Therapy On Internalizing And Externalizing Behavior Problems Of Preadolescent Orphans In Uganda

Description: This pilot study investigated the impact of group activity play therapy (GAPT) on displaced orphans aged 10 to 12 years living in a large children.s village in Uganda. Teachers and housemothers identified 60 preadolescents exhibiting clinical levels of internalizing and externalizing behavior problems. The participants ethnicity was African and included an equal number of females and males. Participants were randomly assigned to GAPT (n = 30) or reading mentoring (RM; n = 30), which served as an active control. Preadolescents in both treatment groups participated in an average of 16 sessions, twice weekly with each session lasting 50 minutes. Sessions were held in the school located within the village complex. A two (group) by two (repeated measures) split plot ANOVA was used to analyze the data. According to teacher reports using the Teacher Report Form (TRF) and housemother reports using the Child Behavior Checklist (CBCL), children receiving the GAPT intervention demonstrated statistically significant decreases (p < .025) in internalizing behaviors (TRF: p < .001; CBCL: p < .001 ) and externalizing behaviors (TRF: p = .006; CBCL: p < .001) from pretest to posttest compared to children who received RM. The GAPT intervention demonstrated a large treatment effect on reducing orphaned childrenÆs internalizing problems (TRF: ?p2= .213; CBCL: ?p2 = . 244) and a moderate to large treatment effect on reducing externalizing problems (TRF: ?p2= .121; CBCL: ?p2 = .217). The statistical, practical, and clinical significance of the findings provided strong, preliminary support for using GAPT as a developmentally and culturally responsive school-based intervention for troubled Ugandan orphans.
Date: December 2011
Creator: Ojiambo, Deborah
Partner: UNT Libraries

Risk Management And Market Efficiency On The Midwest Independent System Operator Electricity Exchange.

Description: Midwest Independent Transmission System Operator, Inc. (MISO) is a non-profit regional transmission organization (RTO) that oversees electricity production and transmission across thirteen states and one Canadian province. MISO also operates an electronic exchange for buying and selling electricity for each of its five regional hubs. MISO oversees two types of markets. The forward market, which is referred to as the day-ahead (DA) market, allows market participants to place demand bids and supply offers on electricity to be delivered at a specified hour the following day. The equilibrium price, known as the locational marginal price (LMP), is determined by MISO after receiving sale offers and purchase bids from market participants. MISO also coordinates a spot market, which is known as the real-time (RT) market. Traders in the real-time market must submit bids and offers by thirty minutes prior to the hour for which the trade will be executed. After receiving purchase and sale offers for a given hour in the real time market, MISO then determines the LMP for that particular hour. The existence of the DA and RT markets allows producers and retailers to hedge against the large fluctuations that are common in electricity prices. Hedge ratios on the MISO exchange are estimated using various techniques. No hedge ratio technique examined consistently outperforms the unhedged portfolio in terms of variance reduction. Consequently, none of the hedge ratio methods in this study meet the general interpretation of FASB guidelines for a highly effective hedge. One of the major goals of deregulation is to bring about competition and increased efficiency in electricity markets. Previous research suggests that electricity exchanges may not be weak-form market efficient. A simple moving average trading rule is found to produce statistically and economically significant profits on the MISO exchange. This could call the long-term survivability of the ...
Date: December 2011
Creator: Jones, Kevin
Partner: UNT Libraries

An Examination Of Soft Skills Listed In Texas Electronic Job Postings And Undergraduate Business Information Systems Syllabi

Description: The purpose of this study was to explore the alignment of soft skills sought by current business IS entry-level employers in electronic job postings, with the integration of soft skills in undergraduate business information systems (IS) syllabi of public four-year universities in Texas. One hundred fifty job postings were extracted from two major electronic career databases. Ten undergraduate AACSB-accredited programs in the field of business information systems (IS) were investigated, and syllabi for the 70 major courses of the business IS programs were obtained for review. Content analysis was applied to all job postings and syllabi, exposing all soft skills related to the 9 categories used in this study adapted from the 21st Century Framework for Learning (Partnership for 21st Century Learning, 2009). Frequencies were tabulated to determine rank of soft skills in job postings and syllabi, and Jaccard’s coefficient statistic of occurrence was used for cluster analysis. Soft skills within all 9 categories were found in job postings (n = 1554) and course syllabi (n = 774). Three soft skill categories were aligned between job postings and syllabi: (1) initiative and self-direction, (2) social and cross-cultural skills, and (3) flexibility and adaptability. However, because differences in the higher ranked frequencies of soft skills in job postings and syllabi were noted, the null hypothesis of this study was rejected.
Date: December 2011
Creator: Scott-Bracey, Pamela
Partner: UNT Libraries

A Study Of The Perception Of Cataloging Quality Among Catalogers In Academic Libraries

Description: This study explores the concept of "quality" in library cataloging and examines the perception of quality cataloging among catalogers who work in academic libraries. An examination of the concept of "quality cataloging" in library science literature revealed that even though there is some general agreement on how this concept is defined, the level of detail and focus of these definitions often vary. These various perceptions were dissected in order to develop a framework for evaluating quality cataloging definitions; this framework was used to evaluate study participants' definitions of quality cataloging. Studying cataloger perceptions of quality cataloging is important because it is catalogers (particularly original catalogers) who are largely responsible for what is included in bibliographic records. Survey participants (n = 296) provided their personal definition of quality cataloging as well as their opinions on their department's cataloging, their influence upon their department's policies and procedures, and the specific data that should be included in a quality bibliographic record. Interview participants (n = 20) provided insight on how their opinions of quality cataloging were formed and the influences that shaped these opinions.
Date: December 2011
Creator: Snow, Karen
Partner: UNT Libraries

The Use Of Effect Size Estimates To Evaluate Covariate Selection, Group Separation, And Sensitivity To Hidden Bias In Propensity Score Matching.

Description: Covariate quality has been primarily theory driven in propensity score matching with a general adversity to the interpretation of group prediction. However, effect sizes are well supported in the literature and may help to inform the method. Specifically, I index can be used as a measure of effect size in logistic regression to evaluate group prediction. As such, simulation was used to create 35 conditions of I, initial bias and sample size to examine statistical differences in (a) post-matching bias reduction and (b) treatment effect sensitivity. The results of this study suggest these conditions do not explain statistical differences in percent bias reduction of treatment likelihood after matching. However, I and sample size do explain statistical differences in treatment effect sensitivity. Treatment effect sensitivity was lower when sample sizes and I increased. However, this relationship was mitigated within smaller sample sizes as I increased above I = .50.
Date: December 2011
Creator: Lane, Forrest C.
Partner: UNT Libraries

Anti-bullying Policies And Practices In Texas Middle Schools

Description: For over a decade national attention to bullying in American schools has increased, fueled by publicity about suicides of severely bullied youth. Schools have the charge of maintaining the safety of all students in order to ensure a positive learning environment, but there is little information about what they are doing to prevent bullying. The purpose of this study was to provide information on principals’ perceptions of bullying and what anti-bullying policies, procedures, and programs exist in Texas middle schools. Ninety-nine principals completed an online questionnaire that addressed: 1) their knowledge of district and campus policies concerning bullying; 2) their direct experience with bullying; and, 3) bullying-prevention strategies and training in place in their schools. Principals reported direct experience with all types of bullying included on the questionnaire in their schools, but had a surprisingly small mean of 14.8 verified bullying incidents during the 2010-2011 year. Over 60% felt the level of physical safety in their school was good or very good, but only 35% rated their school’s emotional safety as good or very good. Students, parents, and teachers reported bullying to the majority of principals; however, few schools conducted annual student surveys that could provide accurate information about bullying in their schools. Procedures required by state law were more likely to be in place than those not required, though not all schools complied with all requirements. Fewer than 10% of schools had implemented a formal anti-bullying program. The most commonly cited obstacles to effectively addressing bullying were lack of time to conduct investigations and getting parents to file written reports (40%); however, despite having anti-bullying training, 27% felt limited by the lack of strategies. This study fills a void in the literature by providing a statewide overview of middle school principals’ knowledge of district and campus policies and procedures ...
Date: December 2011
Creator: Robbins, Rosemary
Partner: UNT Libraries

An Experimental Examination Of The Effects Of Goal Framing And Time Pressure On Auditors’ Professional Skepticism

Description: Professional skepticism is a critical component of audit practice and current auditing standards direct auditors to remain skeptical throughout the duration of each audit engagement. Despite the importance and prevalence of an emphasis on professional skepticism throughout auditing standards, evidence indicates that auditors often fail to exercise an appropriate degree of professional skepticism. Prior accounting research suggests that auditors’ professionally skeptical behavior is affected by individual personality traits as well as situational (state) influences, whereby both factors contribute to auditor professional skepticism. Yet, prior research has primarily focused on trait skepticism; and little research to date has investigated the concept of state skepticism. The purpose if this research study is to experimentally investigate the impact of time pressure and trait skepticism on state skepticism, and to test a potential debiasing procedure on the impact of time pressure on state skepticism. In addition, this study examines the influence of both skepticism types on skeptical behavior.This research offers several contributions to accounting literature and practice. First, I contribute to the existing debate regarding the influences of professional skepticism by providing evidence that professional skepticism may be categorized as a temporary state, induced by situational aspects, in addition to being classified as an enduring trait. Second, I identify certain situational conditions which create differences in the level of state professional skepticism exhibited within an auditing context. Lastly, my findings may also be important to audit firms as they consider tools within their training arsenal equipped to promote an appropriate level of professional skepticism among employees. If auditor skepticism can be influenced by the frames they are provided, then audit firms may create an environment that promotes consistency in auditors’ application of professional skepticism, simply by engaging in goal framing.
Date: December 2011
Creator: Robinson, Shani N.
Partner: UNT Libraries

The Relationship Between Professional Sexual Boundary Violation And Sex Addiction: An Exploratory Study Of Post-treatment And Retrospective Pre-treatment Dispositions

Description: In this exploratory study, 35 male professionals who had successfully completed residential sex addiction treatment were surveyed. Respondents’ median age was 47.5, and reported ethnicities were White (89%), Asian, (9%) and Hispanic (2%). Prior to intake, 17 respondents had reportedly violated sexual boundaries with patients, clients, or staff (BV group) and 18 reportedly had not (NBV group). Respondents completed a demographic information form and two validated instruments: (a) Sexual Symptom Assessment Scale (S-SAS), measuring symptom severity of Compulsive Sexual Behavior (CSB); and (b) Boundary Violation Index (BVI), assessing frequency of risk factors for Sexual Boundary Violation (SBV). Respondents reported a very large decrease in CSB symptom severity over time (partial 2 = .856), change that was statistically equal for respondents in the BV and NBV groups. Furthermore, respondents reported a large decrease in SBV risk over time (partial 2 = .620); however, the BV group reported a greater decrease in SBV risk than the NBV group (partial 2 = .221). Reductions in both CSB symptoms and SBV risk were stable over time, up to five years post discharge. CSB symptoms and SBV risk were not correlated at retrospective pre-treatment, but for practical purposes, were moderately correlated at post treatment (r = 0.386, n = 25, p = 0.057). Although not significant, correlation at pre-treatment was more than twice as strong for the BV group than for the NBV group. Days of Treatment was a meaningful, although non-significant, contributor to decreases in CSB symptom severity (? = -.323). Similarly, Days of Treatment (? = -.785), Counseling (? = -.303), Recovery Support (? = -.292), and Continuing Education (? = -.259) were meaningful, although non-significant, contributors to decrease in SBV risk. At study participation, 77.1% of respondents had reportedly retained their professional licenses, although 15.4% reported having received a new licensing board ...
Date: December 2011
Creator: Menassa, Bret Michael
Partner: UNT Libraries

Ninth-grade Students’ Negotiation Of Aesthetic, Efferent, And Critical Stances In Response To A Novel Set In Afghanistan

Description: This qualitative, action research study was guided by two primary research questions. First, how do students negotiate aesthetic, efferent, and critical stances when reading a novel set in Afghanistan? Second, how do aesthetic and efferent stances contribute to or hinder the adoption of a critical stance? A large body of research exists that examines student responses to literature, and much of that research is based on the transactional theory of reading. However, it remains unclear how critical literacy fits into this theory. This study describes how one group of high school students’ aesthetic and efferent responses to a novel set in Afghanistan supported their development of critical stances. Six students enrolled in a ninth-grade English course participated in this study. Data were collected for 13 weeks. Data included two individual interviews with each student, student writing assignments in the form of 6 assigned journal entries and 7 assigned essays, transcriptions of 12 class discussions, field notes, lesson plans, a teacher researcher journal, and research memos. Data were analyzed using the constant comparative method. Three major findings emerged from this study. First, class discussions provided a context for students to adopt stances that were not evident in their individual written responses to the novel, which were completed prior to the discussions. Second, the discussions provided scaffolding that helped several of the students adopt world-efferent and critical stances. Third, both the aesthetic and the efferent stances contributed to students’ adoption of critical stances.
Date: December 2011
Creator: Taliaferro, Cheryl
Partner: UNT Libraries

"The Rainy Fragrance Musical”: Wintter Watts’ Song Cycle Vignettes Of Italy With Poetry By Sara Teasdale

Description: Wintter Watts (1884-1962) was one of the most admired composers of American art song in the early twentieth century. The history of great singers who performed his songs at that time attests to the reputation of Watts as a song composer. Unfortunately the songs of Watts have become largely neglected by singers from later generations. The song cycle Vignettes of Italy (1919) for high voice is regarded by many as Watts♠ best-known composition. Vignettes of Italy was frequently performed by many famous singers in America in his day, but is little known in the current repertoire of American art song and rarely performed today. Vignettes of Italy is worthy of reintroduction to contemporary audiences and singers. This study explores the significant contributions Wintter Watts made to the body of American art song in the early twentieth century and presents a thorough investigation of Watts♠ compositional techniques of Sara Teasdale♠s texts in his song cycle Vignettes of Italy. These techniques include the use of carefully tailored rhythms, modulations, harmonic progressions, and accompaniment figures to give unique treatment to the musical setting of individual words, poetic ideas, and broader moods. I hope this research provides a foundation of understanding of this cycle, assists singers and pianists in presenting artistically coherent performances, and creates a fuller comprehension and appreciation of Watts songs.
Date: December 2011
Creator: Kwon, Hye-Ryung
Partner: UNT Libraries

Predictors Of Physical Activity Participation In The Older Foreign-born Population In The United States: Data From The National Health Interview Survey (Nhis) 2002-2009

Description: Promoting physical activity in older adults is an important part of healthy aging. With an increasing older foreign-born population in the United States, there is limited information on physical activity participation in this group and even less for those experiencing difficulties in physical functioning and chronic illnesses. The primary objective of the study was to determine how physical factors, psychological issues, chronic illnesses, pain symptoms, perceived health status, and number of years living in the U.S. influence physical activity participation in older foreign-born respondents. The secondary objective was to identify the difference of predictors of physical activity participation between older foreign-born and older native-born respondents. The study is based on data collected from the National Health Interview Survey (NHIS) conducted from 2002 to 2009 for adults aged 50 or older. Ordinal logistic regression analysis was used to predict and explain the physical activity participation in older foreign-born respondents. Factors associated with more physical activity participation included a higher level of education, more time living in the U.S., more positively perceived health status, and having at least one chronic illnesses, or pain symptoms. Having more difficulties in physical functioning caused older foreign-born respondents to participate less in physical activity. This study provides the most recent evidence to health-care professionals to develop and implement policies and strategies to facilitate physical activity programs that will be beneficial to elderly immigrants living in the U.S.
Date: December 2011
Creator: Junrith, Kittiwan
Partner: UNT Libraries

Fugal And Canonic Techniques In Selected Large Chorale Preludes Of Clavierübung III By J.S. Bach

Description: Numerous scholars have studied the Clavierübung III, but their studies mainly focused on the relationship between the chorale text and Bach♠s response in music. Analysis without explaining J.S. Bachs word painting in other chorale preludes can be found easily, but most analyses treat rhetoric, especially those dealing with Clavierübung III. There have been numerous studies linking Bach's organ works to Lutheran doctrine. However, to give a better understanding of the work's structure and its implications for performance, a contrapuntal analysis is indispensable. This study deals with an analysis focused on canonic and fugal techniques in selected large chorales, and it will provide a better understanding of Clavierbung III. For purposes of comparison with typical fugal techniques, the C minor fugue from the Well-Tempered Clavier I, BWV 847, is taken as a model. This work reveals typical eighteenth-century, late Baroque fugal structure with a well-defined subject. The episode modulates through the keys of Eb major-G minor and C minor. Below is an outline of the present paper. Chapter I discusses the purpose of this study. Chapter II covers the earlier research on Clavierübung III and includes a discussion of the general background of the Clavierübung III. Chapter III provides a contrapuntal analysis of the three chorale preludes. A translation of the text will be included in each analysis.Chapter IV, the conclusion, will summarize and confirm the findings from the present study of the analysis.
Date: December 2011
Creator: Kwon, Wonjung
Partner: UNT Libraries

Missed Opportunities: Examining The LiteracyExperiences Of African American Students Displaced By Hurricane Katrina.

Description: The purpose of this study was to examine how five African American middle school students, who were displaced by Hurricane Katrina represent their literacy experiences before, during, and after their displacement. Specifically, the two research questions were: (a) What are the stories that these middle school students tell about their lives, before, during, and after their displacement, and (b) What do their stories reveal about their literacy experience before, during, and after their displacement? Narrative Inquiry was the chosen methodology for the study, which allowed the participants to tell their experiences from a first-person perspective. It also encouraged the participants to reflect upon these experiences, in order to give meaning to their thoughts and emotions. Employing a critical lens and perspective, I constructed a narrative profile for each participant, which was then analyzed using these methods. Each narrative profile detailed the literacy experiences of the participants before Hurricane Katrina, during the transition period, and current literacy experiences now that the participants are resettled and attending school in the host city. These data were supplemented by archival data such as report cards, individual education plans (IEPs), and Texas Assessment of Knowledge and Skills (TAKS) scores. Data analysis of the five participants’ literacy experiences revealed common themes. These participants have pleasant memories of school literacy before the storm and mentioned “choice” as a component of those experiences. During the transition period, few or no literacy experiences took place. Hence, there were missed opportunities for the participants to use literacy experiences to make connections to their new world. Participants reported current classroom and school experiences were controlled environments that led to controlled literacy experiences. This compartmentalization of literacy experiences is not consistent with the critical literacy perspective adopted in this study. Their interviews suggested that they that they saw no connection between school ...
Date: December 2011
Creator: Pollard, Tamica McClarty
Partner: UNT Libraries

Struggling Middle School Readers Learning To Make Intertextual Connections With Texts

Description: When people read, they often make connections to their lives, the world, and other texts. Often, these connections are not overt, but are a thinking process invisible to observers. The purpose of this study was to explore the intertextual connections struggling middle school students made as they read multiple topically-related texts to build knowledge, through observation of discussions, surveys, and interviews with students. The students received 30 lessons based on the constructivist model of comprehension. Data sources included observations during the delivery of these interactive lessons and surveys regarding their connections, their use of the connection strategies in content area classes, and their knowledge of the topic. The observations and surveys were analyzed using the constant comparative method. Information rich cases were developed from these data, as well as from interviews with selected students. Although the students were considered struggling readers, they did not respond to the instruction as stereotypical struggling readers. They were engaged, and they led discussions and shared connections with the class. The students demonstrated they learned to make connections and more text-to-text or intertextual connections overall. The students made connections when interested in the topic and had opportunities to discuss the texts. Finally, the students sometimes made connections in content area classes with opportunity in those classes. The study has implications for theory, future research, and practice of teachers and library media specialists.
Date: December 2011
Creator: Johnson, Sunni
Partner: UNT Libraries

Organizational Citizenship Behaviors Among Public Employees In Guadalajara Metropolitan Area, Mexico

Description: This study develops a theoretical framework to examine the major dimensions of transformational leadership style (TLS), public service motivation (PSM), organizational citizenship behavior (OCB), and public organization performance (POP). It is hypothesized that when employees perceived a public organization is practicing a transformational leadership style, they are likely to have a favorable view on the performance of their organization, but the effect is indirect and mediated by OCB. At the same time, if employees have a strong desire to serve and improve the welfare of others, they are likely to perform beyond their job requirements and thus, likely to express a positive view on the organizational performance. A structural equation modeling was used to examine 1,016 public employees (67.7% response rate) in the Guadalajara metropolitan area, Mexico i.e., concerning their perceptions about leadership style, motivation to serve in the public sector, citizenship behaviors, and public organizational performance. The results suggest that if Mexican public employees perceived their leaders to adopt a transformational leadership style, they were likely to have a favorable view on the performance of their organization (direct effect); and that, the effect is mediated by their tendency to engage in activities that would contribute to the functioning of the organization without expecting any kinds of reward (indirect effect). In addition, if employees have a strong motivation to serve in the public sector, they are also likely to have a favorable view on the performance of the organization; and that, the positive effect is mediated by their tendency to act for the goodness of other employees and organizations without expecting some form of reward (indirect effect). A multi-group analysis, based on the hypothesized model, revealed the associations varied across three groups: difference between male and female, places of employment within the public sector (i.e., local or state government), and ...
Date: December 2011
Creator: León Cázares, Filadelfo
Partner: UNT Libraries

Jean-michel Defaye’s Á La Maniére De Debussy Pour Trombone Et Piano: A Compositional Comparison To Claude Debussy’s Harmonic, Melodic, And Rhythmic Practices

Description: Jean-Michel Defaye composed Á La Maniére de Debussy in 2001 as part of a series of trombone solos written to emulate the compositional styles of significant predecessors. This study compares Á La Maniére de Debussy to the harmonic, melodic, and rhythmic practices of Claude Debussy (1862–1918), an innovative French composer and recognized figure of musical Impressionism. At present, there is limited scholarship on Defaye’s Á La Maniére de Debussy and its compositionally imitative nature. The first section of this document presents a survey of historical information, current literature, and methods of examination. The second section provides biographical information on composers Jean-Michel Defaye and Claude Debussy. The third section exhibits a compositional comparison of Á La Maniére de Debussy to Debussy’s use of harmony, melody, and rhythm. The final section draws a conclusion to the piece’s importance to the trombone solo repertoire and includes an interview with French trombonist Jacques Mauger who collaborated with Defaye on Á La Maniére de Debussy. Although this document is not a performance guide, an informed performance of Á La Maniére de Debussy requires a trombonist to understand Debussy’s unique treatment of harmony, melody, and rhythm.
Date: December 2011
Creator: Rader, Aaron Christian
Partner: UNT Libraries

High School Teachers’ Perceptions Of Their Principals As Culturally Proficient Leaders

Description: This study examined Texas high school teachers’ perceptions of their principals as culturally proficient leaders, focusing specifically on how teacher-, school-, and principal-related factors impacted these perceptions. A sample of 104 teachers in culturally diverse secondary schools from a large urban district in Texas participated. An electronic survey was utilized to collect data. Results yielded an average total cultural proficiency score of 111 out of a possible 175, indicating that teachers perceived their principals “sometimes use” culturally proficient practices. Teachers’ perceptions of their principal’s use of culturally proficient leadership practices varied significantly by years of teachers’ experience and school accountability rating (exemplary, academically acceptable, and academically unacceptable). Perceptions of teachers at an Exemplary school were significantly different (higher than the perceptions of teachers at other schools from the same district). Teachers with 11 to 20 years of teaching experience gave significantly lower ratings (22.45 points) than teachers with 1 to 5 years of experience (125.53) and teachers with over 20 years of experience (118.94). While differences were not statistically significant, black and Hispanic teachers rated their principals’ culturally proficient practices higher than white teachers. Age, subject area taught and teacher’s gender, or race being the same as the principal’s gender or race had no significant effect on total proficiency scores. This study supports prior findings that leadership policy and development programs must be refined to help leaders develop and utilize more culturally proficient skills that will lead to greater academic success for all students. Results indicate that principals need assistance in adapting to and managing the dynamics of difference as well as providing teachers with conflict resolution training. It is recommended that professional development departments conduct similar district-wide proficiency assessments as a first step in helping educators to understand the cultural proficiency conceptual framework. It is also recommended that school ...
Date: December 2011
Creator: Owens Luper, Willene DeeAndra
Partner: UNT Libraries

Indoor Localization Using Magnetic Fields

Description: Indoor localization consists of locating oneself inside new buildings. GPS does not work indoors due to multipath reflection and signal blockage. WiFi based systems assume ubiquitous availability and infrastructure based systems require expensive installations, hence making indoor localization an open problem. This dissertation consists of solving the problem of indoor localization by thoroughly exploiting the indoor ambient magnetic fields comprising mainly of disturbances termed as anomalies in the Earth’s magnetic field caused by pillars, doors and elevators in hallways which are ferromagnetic in nature. By observing uniqueness in magnetic signatures collected from different campus buildings, the work presents the identification of landmarks and guideposts from these signatures and further develops magnetic maps of buildings - all of which can be used to locate and navigate people indoors. To understand the reason behind these anomalies, first a comparison between the measured and model generated Earth’s magnetic field is made, verifying the presence of a constant field without any disturbances. Then by modeling the magnetic field behavior of different pillars such as steel reinforced concrete, solid steel, and other structures like doors and elevators, the interaction of the Earth’s field with the ferromagnetic fields is described thereby explaining the causes of the uniqueness in the signatures that comprise these disturbances. Next, by employing the dynamic time warping algorithm to account for time differences in signatures obtained from users walking at different speeds, an indoor localization application capable of classifying locations using the magnetic signatures is developed solely on the smart phone. The application required users to walk short distances of 3-6 m anywhere in hallway to be located with accuracies of 80-99%. The classification framework was further validated with over 90% accuracies using model generated magnetic signatures representing hallways with different kinds of pillars, doors and elevators. All in all, this dissertation ...
Date: December 2011
Creator: Pathapati Subbu, Kalyan Sasidhar
Partner: UNT Libraries

Factors Affecting Faculty Use Of Learning Object Repositories: An Exploratory Study Of Orange Grove And Wisc-online

Description: The purpose of this study was to identify factors that motivate or impede faculty use of learning object repositories (LORs). The unified theory of acceptance and use of technology (UTAUT) served as the theoretical framework for this study. Both quantitative and qualitative approaches were used in the study to explore two research questions relating to factors affecting faculty use of LORs. Research subjects were faculty and instructional staff users from two LORs: Orange Grove and Wisc-Online. This study was a two-phase design study. In Phase I, I conducted 13 interviews and analyzed data by a content analysis method. Phase II of the study was designed based on the results of Phase I. I collected data by a survey instrument from 38 respondents and analyzed the data by descriptive statistics and analysis of variance in Phase II. The results of the study indicated 22 factors as motivators for faculty use of LORs and 13 factors as barriers for faculty use of LORs. The study is the first to identify factors affecting faculty use of LORs from actual faculty users’ perspectives based on UTAUT. The study’s findings contribute to understanding the reasons that faculty use or do not use LORs and provide foundations for designing strategies to increase faculty use of LORs.
Date: December 2011
Creator: Xu, Hong
Partner: UNT Libraries

Comparative Analysis Of 105 Higher Education Doctoral Programs In The United States

Description: The mission types of 105 current doctoral programs in higher education and the extent to which their missions have changed since a similar study was conducted by Dressel and Mayhew in 1974 was studied. The curricula offerings of these programs by degree type (e.g., Ed.D. & Ph.D.) were compared with Fife’s 1991 findings. Finally, the study examined the various modes of instruction (e.g., classroom, online, cohort, blended) these programs utilize. The population was the 131 U.S. higher education doctoral program coordinators or directors who were identified using the ASHE Higher Education Program Directory. A total of 46 hosted Ed.D. programs and 59 hosted Ph.D. programs for a combined total of 105 doctoral programs. An electronic survey, developed by utilizing an expert panel and the cognitive interviewing technique, was sent to each participant. A total of 46 hosted Ed.D. programs and 59 hosted Ph.D. programs for a combined total of 105 doctoral programs. A total of 77 institutions (59%) returned usable questionnaires, and six other universities (5%) indicated their doctoral higher education programs no longer existed. Twenty-three of the responding institutions identified with a research-focused mission; 25 institutions identified with a practitioner-based mission; and 28 institutions identified with both types of missions. Pearson r correlation analysis revealed no statistically significant relationship between degree type and course offerings (r = .123, p = .05). However, ? 2 revealed that, compared to Ed.D. programs, Ph.D. programs enrolled significantly more full-time students (? 2 (3) = 14.504, p < .05). Through further analysis, a core of nine courses emerged for more than 75% of all higher education doctoral programs. Those courses are general administration of higher education, finance of higher education, legal studies, history of higher education, philosophy and theoretical foundations of higher education, teaching/learning in higher education, student affairs administration, college student research, ...
Date: December 2011
Creator: Valerin, Marcus P.
Partner: UNT Libraries

Temporal Properties Of Dynamic Processes On Complex Networks

Description: Many social, biological and technological systems can be viewed as complex networks with a large number of interacting components. However despite recent advancements in network theory, a satisfactory description of dynamic processes arising in such cooperative systems is a subject of ongoing research. In this dissertation the emergence of dynamical complexity in networks of interacting stochastic oscillators is investigated. In particular I demonstrate that networks of two and three state stochastic oscillators present a second-order phase transition with respect to the strength of coupling between individual units. I show that at the critical point fluctuations of the global order parameter are characterized by an inverse-power law distribution and I assess their renewal properties. Additionally, I study the effect that different types of perturbation have on dynamical properties of the model. I discuss the relevance of those observations for the transmission of information between complex systems.
Date: December 2011
Creator: Turalska, Malgorzata A.
Partner: UNT Libraries

Baroque Elements In The Piano Sonata, Opus 9 By Paul Creston

Description: Paul Creston (1906-1985) was one of the most significant American composers from the middle of the twentieth century. Though Creston maintained elements of the nineteenth-century Romantic tradition and was categorized as a “Neo-Romantic” or “20th-century traditionalist,” many of Creston’s compositions contain elements of Baroque music. His Piano Sonata, Opus 9 provides significant examples of Baroque elements, while already foreshadowing his mature style. The purpose of this study is to explore Baroque elements in the compositional language of Paul Creston’s Piano Sonata, Opus 9. All four movements of the Piano Sonata will be examined in regards to its stylistic features associated with Baroque practices. These features mainly consist of rhythm, texture, imitative writing, and repeated phrase structure. Each category of the study will include comparisons of Domenico Scarlatti’s keyboard sonatas with Creston’s sonata. Through an examination of the Piano Sonata and its Baroque elements, this study hopes to inspire renewed interest in the work among musicians and to help the performer give a more stylistically coherent, and accurate, performance.
Date: December 2011
Creator: Watanabe, Chie
Partner: UNT Libraries