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Investigating the effects on parallel play between siblings: Teaching children with autism to emit social phrases to their typically developing sibling.
The focus of this study was three fold. First, modeling and feedback were investigated as a training package for social interactions between siblings. Second, the effects of social phrases taught to the sibling with autism were investigated. Third, the magnitude of these social phrases was measured by timing duration of parallel play. The experimental design is an A-B-A1-A2 design conducted in a clinic, with a probe for generalization in the home environment. This intervention was replicated across an additional sibling dyad to indicate its effectiveness. This study ascertained that the sibling with autism was a viable participant in learning new social skills that could function as a behavioral cusp and increase sibling interactions. digital.library.unt.edu/ark:/67531/metadc28370/
An Investigation of Malingering and Defensiveness Using the Spanish Pai Among Spanish-speaking Hispanic American Outpatients
For response styles, malingering describes the deliberate production of feigned symptoms by persons seeking external gain such as financial compensation, exemption from duty, or leniency from the criminal justice system. In contradistinction, defensiveness occurs when patients attempt to downplay their symptoms of psychological impairment. Both of the aforementioned response styles can markedly affect the accuracy of diagnosis, especially on self-reports, such as multiscale inventories. As an important oversight, no studies have been conducted to examine the effect of culturally specific response styles on profile validity and the classification of malingering among Hispanic American clinical populations. The current study investigated whether the Spanish Personality Assessment Inventory (PAI) effectively distinguished between Spanish-speaking outpatient groups randomly assigned to honest, feigning, and defensive experimental conditions. In examining the results, PAI malingering indicators utilizing Rare Symptoms strategies (NIM and MAL) demonstrated moderate to large effect sizes. For defensiveness, Spanish PAI indicators also demonstrated moderate to very large effect sizes (M d = 1.27; range from 0.94 to 1.68). Regarding psychometric properties, Spanish PAI validity scales, provide adequate to good data on reliability and discriminant validity. Clinical utility of the Spanish PAI increases as different cut scores are employed. digital.library.unt.edu/ark:/67531/metadc283782/
A New Wireless Sensor Node Design for Program Isolation and Power Flexibility
Over-the-air programming systems for wireless sensor networks have drawbacks that stem from fundamental limitations in the hardware used in current sensor nodes. Also, advances in technology make it feasible to use capacitors as the sole energy storage mechanism for sensor nodes using energy harvesting, but most current designs require additional electronics. These two considerations led to the design of a new sensor node. A microcontroller was chosen that meets the Popek and Goldberg virtualization requirements. The hardware design for this new sensor node is presented, as well as a preliminary operating system. The prototypes are tested, and demonstrated to be sustainable with a capacitor and solar panel. The issue of capacitor leakage is considered and measured. digital.library.unt.edu/ark:/67531/metadc28378/
Grounds-Based and Grounds-Free Voluntarily Child Free Couples: Privacy Management and Reactions of Social Network Members
Voluntarily child free (VCF) individuals face stigmatization in a pronatalist society that labels those who do not want children as deviant. Because of this stigmatization, VCF couples face privacy issues as they choose to reveal or conceal their family planning decision and face a variety of reactions from social network members. Therefore, communication privacy management and communication accommodation theory was use to examine this phenomenon. Prior research found two different types of VCF couples: grounds-based and grounds-free. Grounds-based individuals cite medical or biological reasons for not having children, while grounds-free individuals cite social reasons for not having children. The purpose of this study is to examine how grounds-based and grounds-free VCF couples manage their disclosure of private information and how social network members react to their family planning decision. Findings revealed that grounds-free individuals are more likely to engage in the self-defense hypothesis and grounds-based individuals are more likely to engage in the expressive need hypothesis. Grounds-based individuals were asked about their decision in dyadic situations, whereas grounds-free individuals were asked at group gatherings. Additionally, social network members used under-accommodation strategies the most frequently and grounds-free individuals experienced more name calling than grounds-based. Finally, while grounds-free individuals experienced non-accommodation and over-accommodation strategies, grounds-based did not. Findings suggest that grounds-free individuals are more stigmatized by social network members. Implications for merging CPM and CAT are discussed. digital.library.unt.edu/ark:/67531/metadc28374/
A Performance Guide to Arvo Pärt's Concerto Piccolo Über B-A-C-H for Trumpet, Strings, Harpsichord, and Piano
Arvo Pärt's Concerto Piccolo über B-A-C-H for trumpet, strings, harpsichord, and piano is a brief yet challenging work in the trumpet repertoire. A carefully articulated performance guide is necessary to aid trumpeters in overcoming the numerous musical challenges presented in this piece. Currently, there is no resource that helps in solving performance choices and difficulties in this work. This first section of this document provides historical and contextual information on Arvo Pärt, his compositional output during his experimental period, and subsequently, Concerto Piccolo. The second section includes a performance analysis of the work, while the third gives trumpet players pedagogical suggestions and practical exercises for proper preparation of Concerto Piccolo. This guide presents performers with relevant background, analytical, and pedagogical information required for an informed and high-level performance. digital.library.unt.edu/ark:/67531/metadc283781/
A study of freshman interest groups and leadership practices at Texas Woman's University
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This study investigated the level of leadership practices and retention rates of freshman students at Texas Woman's University. The data for the study were collected using the Leadership Practices Inventory, Student Version. The sample for the study consisted of 151 freshman students. The students were each placed in one of three control groups. Group A students (the treatment group) were in the Neighbors Educated Together Program (NET). Group B students (control group) were in one of two university-sponsored programs (COLORS or University 1000), and Group C students (control group) were the residual group of first-time college freshmen. These three groups were surveyed prior to their participation in the NET program or a university-sponsored program and again at the end of 14 weeks. In addition, retention rates were examined on the 12 class day of the spring semester. The study found statistically significant differences (p <. 05) on the pretests and posttests between Group C, residual students, and the other two groups on the Enabling the Followers to Act subscale, the Inspiring a Shared Vision subscale, and Encouraging the Heart subscale. Group A, NET students, and Group B, COLORS/University 1000 students, showed no statistically significant differences between groups. The difference from the residual group could indicate that students who self-select into programs such as NET, COLORS, and University 1000 are more likely to engage in practices measured by the subscale prior to enrollment in the respective programs. No statistically significant differences were found on the Challenging the Process or Modeling the Way subscales. The lack of significance shows that there are no differences in practices for any of these groups prior to enrollment at the university or as a result of participation in a university-sponsored program such as NET, COLORS, or University 1000. A chi-square test was performed following the 12 class day for the Spring 2001 th semester. Approximately 89% of the students in Group C Residual, 97% of Group B COLORS/University 1000, and 91% of Group A NET were retained. The chi- square frequency test revealed no statistically significant differences in level of retention between groups. digital.library.unt.edu/ark:/67531/metadc2837/
Accuracy and Interpretability Testing of Text Mining Methods
Extracting meaningful information from large collections of text data is problematic because of the sheer size of the database. However, automated analytic methods capable of processing such data have emerged. These methods, collectively called text mining first began to appear in 1988. A number of additional text mining methods quickly developed in independent research silos with each based on unique mathematical algorithms. How good each of these methods are at analyzing text is unclear. Method development typically evolves from some research silo centric requirement with the success of the method measured by a custom requirement-based metric. Results of the new method are then compared to another method that was similarly developed. The proposed research introduces an experimentally designed testing method to text mining that eliminates research silo bias and simultaneously evaluates methods from all of the major context-region text mining method families. The proposed research method follows a random block factorial design with two treatments consisting of three and five levels (RBF-35) with repeated measures. Contribution of the research is threefold. First, the users perceived a difference in the effectiveness of the various methods. Second, while still not clear, there are characteristics with in the text collection that affect the algorithms ability to extract meaningful results. Third, this research develops an experimental design process for testing the algorithms that is adaptable into other areas of software development and algorithm testing. This design eliminates the bias based practices historically employed by algorithm developers. digital.library.unt.edu/ark:/67531/metadc283791/
Comparative Phyto-uptake Across Distribution Coefficients of Pharmaceutical Compounds and Aquatic Macrophytes: Carbamazepine and Amiodarone Uptake in Lemna Spp
Few studies have been conducted on the effectiveness of phytoremediation of pharmaceutical compounds, although the persistent and non-acutely toxic nature of many of these compounds in today's water bodies may yield an ideal application for this practice. To quantify the potential effectiveness of plant uptake, kinetic and proportional bioconcentration factors (BCFk, and BCFp, respectively) in nanograms (ng) carbamazepine and amiodarone per gram (g) wet weight plant tissue for Lemna spp. were determined utilizing a 14-day continuous flow-through study. Samples were analyzed using isotope dilution liquid chromatography-tandem mass spectrometry (ID-LC-MS/MS) running in positive ion mode. Kinetic BCF was estimated at 0.538, while proportional BCF was estimated at 0.485. Kinetic BCF for the amiodarone study was estimated at 23.033, whereas proportional BCF was estimated at 41.340. Possible contamination of the C18 column and peristaltic pump failure may have impacted uptake results. In light of variability and current lack of research in the field, this work should be considered exploratory rather than conclusive. digital.library.unt.edu/ark:/67531/metadc283798/
Correlates Between Adult Romantic Attachment Patterns and Dimensional Personality Pathology
Previous research has suggested that adult attachment disturbance is related to maladaptic interaction patterns and personality disorder constructs. Specifically, research indicates that those with attachment disturbance are significantly more likely to meet criteria for a number of personality disorders, including borderline personality disorder, narcissistic personality disorder, and antisocial personality disorder. The purpose of this study was to investigate the associations between adult attachment and the new dimensional model of personality disorders scheduled to be released in the Diagnostic and Statistical Manual for Mental Health Diosrders (5th ed.) in spring 2013. Participants completed the Schedule for Adaptive and Nonadaptive Personality (SNAP) to measure dimensional personality functioning and the Experiences in Close Relationships (ECR-R) and the Attachment Prototypes to measure adult attachment patterns. Additionally, select scales from the Personality Assessment Inventory (PAI) and the Five Factor Model (FFM) will be utilized as secondary measures of personality patterns. The results suggest strong associations between adult attachment orientations and specific maladaptive personality characteristics. digital.library.unt.edu/ark:/67531/metadc283794/
Transition Metal Mediated C-o Bond Cleavage: From Co2 Activation to Lignin Degradation
CO2 activation and conversion mediated by transition metal (TM) catalysts were investigated. Homogeneous catalysis of the reverse water gas shift reaction CO2+H2→H2O+CO was studied as a means to reduce CO2.  β-diketiminato metal models L'MI ( L' =C3N2H5-; M = first-row TMs) were considered as potential catalysts. The thermodynamics of prototypical reaction pathways were simulated using B3LYP/aug-cc-pVTZ. Results show that middle series metal complexes result in more thermodynamically favorable properties; therefore, more detailed thermodynamic and kinetic studies were carried out for Mn, Fe, and Co complexes. On the other hand, heterogeneous catalysis of the reduction of CO2 to CO was carried out on Fe, Co, Ni, and Cu surfaces, using the PBE functional. Reaction barriers were calculated using the climbing image nudged elastic band method. Late 3d and 4d transition metal ion (Fe, Co, Ni, Cu, Ru, Rh, Pd, and Ag) mediated activation of dimethyl ether was studied to investigate the intrinsic catalytic properties of metals for C-O bond cleavage. A set of density functional theory (DFT) methods (BLYP, B3LYP, M06, M06-L, B97-1, B97-D, TPSS, and PBE) with aug-cc-pVTZ basis sets was calibrated with CCSD(T)/CBS calculations on reaction energies and barriers. digital.library.unt.edu/ark:/67531/metadc283790/
The Masculinity Masquerade: the Portrayal of Men in Modern Advertising
The depiction of gender in advertising is a topic of continuous discussion and research. The present study adds to past findings with an updated look at how men are represented in U.S. advertising media and the real effects these portrayals have on the male population under the theoretical framework of hegemony and social cognitive theory. This research is triangulated with a textual analysis of the ads found in the March 2013 editions of four popular print publications and three focus group sessions separated by sex (two all-male, one all-female), each of which is composed of a racially diverse group of undergraduate journalism and communications students from a large Southwestern university. The results of the textual analysis reveal little ethnic or physical diversity among male figures in advertising and distinguish six main profiles of masculinity, the most frequent of which is described as the "sophisticated man." The focus groups identify depictions of extreme muscularity and stereotypical male incompetence as the most negative representations, while humorous and hyperbolic portrayals of sexual prowess and hyper-masculinity are viewed positively as effective means of marketing to men. digital.library.unt.edu/ark:/67531/metadc283789/
Deconstructing Webern's Op 25, Drei Lieder: a Multidimensional Assessment
Webern scholarship has not comprehensively examined op. 25, drei lieder. If the selection of text for op. 25 is viewed as one work in three movements they create a ternary form (A-B-A1). To show how this form is developed in the music the author creates a new analytical system based on Schoenberg's Grundgestalt which is defined by three basic ideas: symmetry, liquidation, and variation. The relationship between the voice and accompaniment and Webern's deliberate manipulation of the text is used to reveal the use of a program which is then tied to the numerical symbolism of 2 and 3. digital.library.unt.edu/ark:/67531/metadc283780/
Mechanics and Mechanisms of Creep and Ductile Fracture
The main aim of this dissertation is to relate measurable and hopefully controllable features of a material's microstructure to its observed failure modes to provide a basis for designing better materials. The understanding of creep in materials used at high temperatures is of prime engineering importance. Single crystal Ni-based superalloys used in turbine aerofoils of jet engines are exposed to long dwell times at very high temperatures. In contrast to current theories, creep tests on Ni-based superalloy specimens have shown size dependent creep response termed as the thickness debit effect. To investigate the mechanism of the thickness debit effect, isothermal creep tests were performed on uncoated Ni-based single crystal superalloy sheet specimens with two thicknesses and under two test conditions: a low temperature high stress condition and a high temperature low stress condition. At the high temperature, surface oxidation induced microstructural changes near the free surface forming a layered microstructure. Finite element calculations showed that this layered microstructure gave rise to local changes in the stress state. The specimens also contained nonuniform distribution of initial voids formed during the solidification and homogenization processes. The experiments showed that porosity evolution could play a significant role in the thickness debit effect. This motivated a basic mechanics study of porosity evolution in single crystals subjected to creep for a range of stress states. The study was performed using three-dimensional finite deformation finite element analysis of unit cells containing a single initially spherical void in a single crystal matrix. The materials are characterized by a rate-dependent crystal plasticity constitutive relation accounting for both primary and secondary creep. The effect of initial void spacing and creep exponent was also explored. Based on the experimental observations and results of finite element calculations a quantitative mechanistic model is proposed that can account for both bulk and surface damage effects and assess their relative roles in the observed thickness debit effect. Another set of calculations aim at relating the crack growth resistance and fracture surface morphology to material microstructure for ductile structural metals. The process that governs the ductile fracture of structural materials at room temperature is one of nucleation, growth and coalescence of micron scale voids, and involves large plastic deformations. Experimental studies have shown that fracture surfaces in a wide variety of materials and under a wide variety of loading conditions have remarkable scaling properties. For thirty years, the hope to relate the statistical characterization of fracture surfaces to a measure of a material's crack growth resistance has remained unfulfilled. Only recently has the capability been developed to calculate sufficient amounts of three dimensional ductile crack growth in heterogeneous microstructures to obtain a statistical characterization of the predicted fracture surfaces. This development has enabled the exploration of the relation of both fracture toughness and fracture surface statistics to material properties and microstructure when the fracture mechanism is one of void nucleation, growth and coalescence. The relation of both toughness and the statistical properties of fracture surfaces in calculations of heterogeneous microstructures to various microstructural features is discussed and a remarkable correlation between fracture surface roughness and fracture toughness is shown for the first time. digital.library.unt.edu/ark:/67531/metadc283799/
The Phantom Menace: the F-4 in Air Combat in Vietnam
The F-4 Phantom II was the United States' primary air superiority fighter aircraft during the Vietnam War. This airplane epitomized American airpower doctrine during the early Cold War, which diminished the role of air-to-air combat and the air superiority mission. As a result, the F-4 struggled against the Soviet MiG fighters used by the North Vietnamese Air Force. By the end of the Rolling Thunder bombing campaign in 1968, the Phantom traded kills with MiGs at a nearly one-to-one ratio, the worst air combat performance in American history. The aircraft also regularly failed to protect American bombing formations from MiG attacks. A bombing halt from 1968 to 1972 provided a chance for American planners to evaluate their performance and make changes. The Navy began training pilots specifically for air combat, creating the Navy Fighter Weapons School known as "Top Gun" for this purpose. The Air Force instead focused on technological innovation and upgrades to their equipment. The resumption of bombing and air combat in the 1972 Linebacker campaigns proved that the Navy's training practices were effective, while the Air Force's technology changes were not, with kill ratios becoming worse. However, the last three months of the campaign introduced an American ground radar system that proved more effective than Top Gun in improving air-to-air combat performance. By the end of the Vietnam War, the Air Force and Navy overcame the inherent problems with the Phantom, which were mostly of their own making. digital.library.unt.edu/ark:/67531/metadc283785/
Programming for the Latino Youth: a Content Analysis of Prime Time Television Programs By Three Spanish-language Broadcast Networks
This study reviews U.S. Spanish-language broadcast networks' prime time programming content targeted to the Latino youth audience. It explores the relationship between the Latino youth and prime time programming by Spanish-language broadcast networks and how they seek to attract this market as is reflected in the characteristics and quantity of their content and preferred formats by using the strategic management theory. This study identifies the amount and type of prime time programming that was catered to the Latino youth audience between 2003 and 2012 by the three major Spanish-language networks: Univision, Telemundo, and Telefutura. An observed pattern reveals that prime time programming targeting Latino teenagers is relatively smaller and older in comparison to programming delivered through the general programming. digital.library.unt.edu/ark:/67531/metadc283795/
Slaves and Slaveholders in the Choctaw Nation: 1830-1866
Racial slavery was a critical element in the cultural development of the Choctaws and was a derivative of the peculiar institution in southern states. The idea of genial and hospitable slave owners can no more be conclusively demonstrated for the Choctaws than for the antebellum South. The participation of Choctaws in the Civil War and formal alliance with the Confederacy was dominantly influenced by the slaveholding and a connection with southern identity, but was also influenced by financial concerns and an inability to remain neutral than a protection of the peculiar institution. Had the Civil War not taken place, the rate of Choctaw slave ownership possibly would have reached the level of southern states and the Choctaws would be considered part of the South. digital.library.unt.edu/ark:/67531/metadc28371/
Shared Norms, Hierarchical Maintenance, and International Hierarchy
The dissertation studies two aspects of international hierarchy. The world of international politics is not one of completely sovereign states competing in anarchy. Patterns of hierarchy, where a dominant state has legitimate control over some actions of a subordinate state, color the globe. First, I look at shared norms and hierarchy. Most studies concerning hierarchy focus on material maximization as an explanation for hierarchy--if hierarchy increases the wealth and security of two states, then hierarchy is more likely. I argue that shared norms held by two states facilitate hierarchy. Shared norms produce a common in-group community, generate common interests, create common ways of doing business, and give rise to common values that increase subordinate states' ability to persuade the dominant state. These factors ease the creation and maintenance of international hierarchical relationships. Second, I study interstate behaviors that can be explained as actions of maintenance by dominant states over subordinates to preserve or increase a level of hierarchy. I theorize that sticks and carrots from a dominant state (like economic sanctions, military interventions, and foreign aid) help sustain a dominant state's rule by convincing subordinate states to follow the dominant state's commands and expectations. Using data on U.S. hierarchies from 1950 to 2010, I utilize multivariate regressions to test hypotheses drawn from these theories. I find that shared norms associate with hierarchy, and maintenance actions uncommonly associate with compliance. digital.library.unt.edu/ark:/67531/metadc283783/
Alchemies
This thesis consists of a collection of poems and a critical preface. The preface is a discussion of Elizabeth Bishop's descriptive mode, as demonstrated by three of her poems: "Sandpiper," "The Monument," and "Santarém." I argue for Bishop's descriptions as creative acts, and examine the gestures that help her make the reader aware of the shaping power she exercises. digital.library.unt.edu/ark:/67531/metadc283793/
Manipulating Sucrose Proton Symporters to Understand Phloem Loading
Phloem vascular tissues transport sugars synthesized by photosynthesis in mature leaves by a process called phloem loading in source tissues and unloading in sink tissues. Phloem loading in source leaves is catalyzed by Suc/H+ symporters (SUTs) which are energized by proton motive force. In Arabidopsis the principal and perhaps exclusive SUT catalyzing phloem loading is AtSUC2. In mutant plants harboring a T-DNA insertion in each of the functional SUT-family members, only Atsuc2 mutants demonstrate overtly debilitated phloem transport. Analysis of a mutant allele (Atsuc2-4) of AtSUC2 with a T-DNA insertion in the second intron showed severely stunted phenotype similar to previously analyzed Atsuc2 null alleles. However unlike previous alleles Atsuc2-4 produced viable seeds. Analysis of phloem specific promoters showed that promoter expression was regulated by Suc concentration. Unlike AtSUC2p, heterologous promoter CoYMVp was not repressed under high Suc conc. Further analysis was conducted using CoYMVp to test the capacity of diverse clades in SUT-gene family for transferring Suc in planta in Atsuc2 - / - mutant background. AtSUC1 and ZmSUT1 from maize complemented Atsuc2 mutant plants to the highest level compared to all other transporters. Over-expression of the above SUTs in phloem showed enhanced Suc loading and transport, but against expectations, plants were stunted. The implications of SUT over-expression to enhance phloem transport and loading are discussed and how it induces a perception of phosphate imbalance is presented. digital.library.unt.edu/ark:/67531/metadc283792/
An Evaluation of the Effects of Two Different Role Play Formats on the Outcomes of a Parent Training Curriculum
The current study was designed to replicate and extend previous research on the effectiveness of behavioral parent training. Specifically, the effectiveness of the Behavior Management and Parenting Services (BMAPS) curriculum in teaching parents to exhibit a set of parenting skills and respond accurately to a multiple choice examination about positive parenting techniques was evaluated. In addition, the curriculum was revised so that the relative effectiveness and acceptability of two role play formats could be assessed. The outcomes of the study showed an improvement in the participants' ability to identify correct answers on a multiple choice examination and apply the parenting skills taught in class within a role play format; results pertaining to the efficacy of each role play format were less conclusive. digital.library.unt.edu/ark:/67531/metadc28377/
Love Poem with Exiles
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Love Poem with Exiles is a collection of poems with a critical preface. The poems are varied in terms of subject matter and form. In the critical preface, I discuss my relationship with poetry as well as the idea that we inherit poems, and that if we are inspired by them, we can transform them into something new. digital.library.unt.edu/ark:/67531/metadc28465/
Computational Study of Small Molecule Activation via Low-Coordinate Late First-Row Transition Metal Complexes
Methane and dinitrogen are abundant precursors to numerous valuable chemicals such as methanol and ammonia, respectively. However, given the robustness of these substrates, catalytically circumventing the high temperatures and pressures required for such transformations has been a challenging task for chemists. In this work, computational studies of various transition metal catalysts for methane C-H activation and N2 activation have been carried out. For methane C-H activation, catalysts of the form LnM=E are studied, where Ln is the supporting ligand (dihydrophosphinoethane or &#946;-diketiminate), E the activating ligand (O, NCH3, NCF3) at which C-H activation takes place, and M the late transition metal (Fe,Co,Ni,Cu). A hydrogen atom abstraction (HAA) / radical rebound (RR) mechanism is assumed for methane functionalization (CH4 à CH3EH). Since the best energetics are found for (&#946;-diket)Ni=O and (&#946;-diket)Cu=O catalysts, with or without CF3 substituents around the supporting ligand periphery, complete methane-to-methanol cycles were studied for such systems, for which N2O was used as oxygen atom transfer (OAT) reagent. Both monometallic and bimetallic OAT pathways are addressed. Monometallic Fe-N2 complexes of various supporting ligands (LnFe-N2) are studied at the beginning of the N2 activation chapter, where the effect of ligand on N2 activation in end-on vs. side-on N2 isomers is discussed. For (&#946;-diket)Fe-N2 complexes, the additional influence of diketiminate donor atom (N(H) vs. S) is briefly addressed. The remainder of the chapter expands upon the treatment of &#946;-diketiminate complexes. First, the activation and relative stabilities of side-bound and end-bound N2 isomers in monometallic ((&#946;-diket)M-N2) and bimetallic ((&#946;-diket)M-N2-M(&#946;-diket)) first row transition metal complexes are addressed. Second, the thermodynamics of H/H+/H- addition to (&#946;-diket)Fe-bound N2, followed by subsequent H additions up to release of ammonia, is discussed, for which two mechanisms (distal and alternating) are considered. Finally, the chapter concludes with partial distal and alternating mechanisms for H addition to N2 in bimetallic (&#946;-diket)Fe-N2-Fe(&#946;-diket) and (&#946;-diket)M-N2-M(&#946;-diket) (M = Ti,V,Fe), respectively. digital.library.unt.edu/ark:/67531/metadc28462/
The Application of Hackman and Oldham's Job Characteristic Model to Perceptions Community Music School Faculty Have Towards Their Job
Hackman and Oldham's Job Characteristic Model was applied to study of perceptions community music school faculty hold towards their job. The research questions addressed core job characteristics of skill variety, task identity, task significance, autonomy, and feedback, critical psychological states (experienced meaningfulness, experienced responsibility, and knowledge of results); personal and work outcomes of satisfaction and motivation; need for professional growth. The results were compared to the national norms for nine different job families provided by Oldham, Hackman, and Stepina. Thirty-three schools, all members of the National Guild of Community Schools of the Arts, located in every geographical region of the United States, yielded 437 faculty responses (64% return rate). Of the core job characteristics, dealing with others and autonomy received the highest ratings; feedback and task significance received the lowest ratings. Of the psychological states, experienced responsibility yielded the highest rating and experienced meaningfulness yielded the lowest ratings. Of the personal/work outcomes, personal development and colleague relations received the highest ratings; pay satisfaction and overall general satisfaction received the lowest ratings. A comparison to the professional job family norms, using a one-sample ttest, found significant differences in 16 out of the 18 variables measured by the Job Characteristic Model. Strong positive feelings for growth combined with less than strong feelings for the core job dimensions yielded a low motivating potential score of 96.18. digital.library.unt.edu/ark:/67531/metadc2885/
Case studies in terrorism-drug connection: the Kurdistan Workers' Party, the Liberation Tigers of Tamil Eelam, and the Shining Path
This study scrutinizes the drug-terrorism nexus critically with intent to conceive possible remedies for the problem. The vast turnover of the global illicit drug industry constitutes the largest portion of organized crime enterprises' income. Different circles have argued that these enterprises are not the sole actors of the drug business, but terrorist groups, whose ultimate aim is a political change rather than financial strength, also profit from the “business.” The controversial nature of the problem fuelled heated debates and requires an in depth and impartial analysis, which was the main subject of the current study. At the first stage, three different cases, the PKK, the LTTE, and the SL, were studied either to prove or deny the alleged phenomenon. The sampled groups' ideology, structure, and operations helped understand the motives pushing the organizations into the ‘business.' Subsequently, several recommendations capturing vital issues both in countering terrorism and breaking terrorism-drugs link were spelled out. digital.library.unt.edu/ark:/67531/metadc2871/
Memory Management and Garbage Collection Algorithms for Java-Based Prolog
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Implementing a Prolog Runtime System in a language like Java which provides its own automatic memory management and safety features such as built--in index checking and array initialization requires a consistent approach to memory management based on a simple ultimate goal: minimizing total memory management time and extra space involved. The total memory management time for Jinni is made up of garbage collection time both for Java and Jinni itself. Extra space is usually requested at Jinni's garbage collection. This goal motivates us to find a simple and practical garbage collection algorithm and implementation for our Prolog engine. In this thesis we survey various algorithms already proposed and offer our own contribution to the study of garbage collection by improvements and optimizations for some classic algorithms. We implemented these algorithms based on the dynamic array algorithm for an all--dynamic Prolog engine (JINNI 2000). The comparisons of our implementations versus the originally proposed algorithm allow us to draw informative conclusions on their theoretical complexity model and their empirical effectiveness. digital.library.unt.edu/ark:/67531/metadc2825/
The Characteristics of a Community of Practice in a National Writing Project Invitational Summer Institute
This qualitative naturalistic descriptive case study provides an understanding of the characteristics of a community of practice within a National Writing Project Invitational Summer Institute. This study utilized naturalistic, descriptive case study methodology to answer the research question: What characteristics of a community of practice are revealed by the perceptions and experiences of the fellows of a National Writing Project Invitational Summer Institute? Data were gathered in the form of interviews, focus group, observations, field notes, and participant reflective pieces. Peer debriefing, triangulation, thick rich description, as well as member checking served to establish credibility and trustworthiness in the study. Bracketing, a phenomenological process of reflecting on one's own experiences of the phenomenon under investigation was utilized as well. The findings of this study point to five analytic themes. These themes, ownership and autonomy, asset-based environment, relationships, socially constructed knowledge and practices, and experiential learning, intertwine to illuminate the three essential components which must be present for a community of practice to exist: joint enterprise, mutual engagement, and shared repertoire. Participants' portraits provide a description of their unique experiences as they moved fluidly between the periphery and core of the community of practice. digital.library.unt.edu/ark:/67531/metadc28461/
Making the Connection: How Mentors Choose Protégés in Academic Mentoring Relationships
Among other things, mentoring research is concerned with how mentors go about the process of choosing who they should mentor. Even when mentoring relationships are assigned, mentors need to feel that the efforts they are putting forth are worth the time and energy. What protégé attributes best attract the attention of a mentor? What mentor attributes make some protégés more attractive to them than others? This study looks at 3 explanations for mentor-protégé attraction, shedding light on the mental processes that influence why some protégés find it easy to get mentors and why some have a much tougher time finding the right person to mentor them. Practical and theoretical implications of this study are included. digital.library.unt.edu/ark:/67531/metadc28469/
On Their Own: How Thirty-One Tribal Colleges Address Five Educational Concepts
This qualitative research, specifically a content analysis of 31 tribal colleges' mission statements and curricula, examined how the colleges' curricula aligned with the five educational concepts suggested in the colleges' mission statements. Cajete's (1994) seven foundations to indigenous thinking proved to be a major theoretical framework which provided a worldview for tribal learning. The study concluded that whereas the five educational concepts aligned between mission statements and curricula, the curricula emphasized culture, tribal community, and academic success at a greater level than mission statements indicated. Further, tribal colleges' curricula did not emphasize economic concepts as the mission statements indicated. A particular finding suggests that tribal colleges' are investing in environmental studies programs, thus increasing their intellectual capacity to protect their environmental interests while promoting indigenous thinking and community learning across all academic disciplines. Considerable implications include that an increase of American Indian environmental studies graduates may have a positive impact on environmental justice matters as well as the ability to promote new agricultural technologies. Additional implications include how mainstream universities will adapt to an increase of native students studying the sciences rather than liberal arts. digital.library.unt.edu/ark:/67531/metadc28466/
Evaluation of the Easter Seals North Texas Autism Treatment Program: Progress in Meeting Program Mission
Applied behavior analysis (ABA) remains at the forefront of effective interventions for children with autism. In some cases, the high cost of treatment and other environmental factors limit families from accessing services. The Easter Seals North Texas (ESNT) Autism Treatment Program (ATP) was created to reach high risk, underserved families in the North Texas area by providing early intensive behavioral intervention (EIBI) services to children with autism. This evaluation was conducted to analyze the success of meeting the ESNT ATP program mission to provide culturally responsive ABA to children. The evaluation includes the design of assessments, the analysis of the assessment data, and a set of recommendations to maintain and increase program accessibility. digital.library.unt.edu/ark:/67531/metadc28463/
Problems Encountered in Money Laundering Investigations
The purpose of this study is to identify how the U.S. is responding to money laundering and what kind of problems arise while countering it, beginning with a detailed description of money laundering, its stages, typologies, impacts, and complications. Due to the broad nature of this subject only three main issues form the focal point of this study: problems concerning the banking industry and other financial organizations, problems resulting from the limitations of law enforcement agencies, and problems arising from the lack of cooperation between and within financial institutions and law enforcement agencies. Several probable solutions to the above problems are identified: Considering the financial industry, there are loopholes in the Bank Secrecy Act (BSA) and in other regulations that apply to the industry. Thus, there is a comparison of the Subjective Model vs. Objective Model in terms of reporting systems for financial organizations. On the law enforcement side, the priority is the need to update and upgrade their technology and investigation mechanisms in order not to fall behind the criminals. Finally, cooperation is something that can be achieved through mutual respect and understanding of the priorities of each side, which can be achieved by the creation of an upper agency of whose members represent both sides of the combat efforts. digital.library.unt.edu/ark:/67531/metadc2856/
Grandparent-Grandchild Attachment as a Predictor of Psychological Adjustment among Youth from Divorced Families
Grandparent-Grandchild Attachment as a Predictor of Psychological Adjustment among Youth from Divorced Families digital.library.unt.edu/ark:/67531/metadc2895/
The Role of Brand Equity in Reputational Rankings of Specialty Graduate Programs in Colleges of Education: Variables Considered by College of Education Deans and Associate Deans Ranking the Programs
Seeking to identify and further understand the variables considered when ranking specialty programs in colleges of education, this research study surveyed all deans, and associate deans responsible for graduate education, at United States institutions that offer the terminal degree in at least one of the ten education specialty areas. The study utilized a three-dimension model of brand equity from the marketing literature, which included the elaboration likelihood model of persuasion. Descriptive statistics determined that research by the faculty of the specialty program is the variable most widely considered by deans and associate deans when determining reputation. In order to determine what predicts a person's motivation to correctly rank programs, a principal components analysis was utilized as a data reduction technique, with parallel analysis determining component retention. The model identified five components which explained 66.224% of total variance. A multiple regression analysis determined that characteristics of a specialty program was the only statistically significant predictor component of motivation to correctly rank programs (&#946; = .317, p = .008, rs2 = .865); however, a large squared structure coefficient was observed on perceived quality (rs2 = .623). Using descriptive discriminant analyses, the study found there is little evidence that marketing efforts have differing effects on groups. Further, a canonical correlation analysis that examined the overall picture of advertising on different groups was not statistically significant at F (15, 271) = .907, p = .557, and had a relatively small effect size (Rc2 = .099). digital.library.unt.edu/ark:/67531/metadc28447/
Medical School Admissions Across Socioeconomic Groups: An Analysis Across Race Neutral and Race Sensitive Admissions Cycles
While the relationship between academic variables and admission into medical school has been well documented, the relationship between socioeconomic background and admission has not been extensively examined. In 2001, the Texas Legislature passed HB 1641, which allowed for the use of socioeconomic variables in the admission of graduate and professional school students. Additionally, the Grutter v. Bollinger decision in 2003 removed a prohibition on the use of race or ethnicity in the admission of students in the state of Texas. The study examined the role medical school admissions selectivity as it relates to the socioeconomic background during a race neutral admissions cycle in 2005 and a race sensitive admissions cycle in 2006. The results of data analysis found that in a race neutral admissions cycle socioeconomic background was a significant factor in the admission of applicants to medical school. However, it was not a significant factor for applicants from underrepresented minority groups. The analysis also found that socioeconomic background was a significant factor in the admission of applicants to medical school in a race sensitive admissions cycle as well. Finally, the study found that variances in selectivity led to differences in the socioeconomic makeup of entering students across different medical schools. From the data analyzed in this study, it can be argued admission to medical school is in agreement with the sociological literature in that parental socioeconomic status is positively related to academic opportunities for their offspring. digital.library.unt.edu/ark:/67531/metadc28440/
The Pettis Integral and Operator Theory
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Let (Ω, Σ, µ) be a finite measure space and X, a Banach space with continuous dual X*. A scalarly measurable function f: Ω→X is Dunford integrable if for each x* X*, x*f L1(µ). Define the operator Tf. X* → L1(µ) by T(x*) = x*f. Then f is Pettis integrable if and only if this operator is weak*-to-weak continuous. This paper begins with an overview of this function. Work by Robert Huff and Gunnar Stefansson on the operator Tf motivates much of this paper. Conditions that make Tf weak*-to-weak continuous are generalized to weak*-to­weak continuous operators on dual spaces. For instance, if Tf is weakly compact and if there exists a separable subspace D X such that for each x* X*, x*f = x*fχDµ-a.e, then f is Pettis integrable. This nation is generalized to bounded operators T: X* → Y. To say that T is determined by D means that if x*| D = 0, then T (x*) = 0. Determining subspaces are used to help prove certain facts about operators on dual spaces. Attention is given to finding determining subspaces far a given T: X* → Y. The kernel of T and the adjoint T* of T are used to construct determining subspaces for T. For example, if T*(Y*) ∩ X is weak* dense in T*(Y*), then T is determined by T*(Y*) ∩ X. Also if ker(T) is weak* closed in X*, then the annihilator of ker(T) (in X) is the unique minimal determining subspace for T. digital.library.unt.edu/ark:/67531/metadc2844/
An Experimental Study on Situated and Dynamic Learning Assessment (SDLA) Environment
The current supplementary web based English learning in Taiwan provides online learning resources and gives assessments at the end of each lesson to evaluate learners' online learning results. Based on the testing results, instructors may adjust their in-class instructional method to focus on the students' weaknesses. For the average classroom size of 40 students with one instructor, it is extremely difficult to provide individual learning content for each learner's needs because each student has his or her own weaknesses. This study conducted the situated environment with Vygotsky's dynamic assessment theory to test learner's learning achievements and satisfactions as compared to the current web learning environment. The study finds that when both groups of Taiwanese students used Internet based learning, those that utilized the situated and dynamic learning assessment environment showed a statistically significant higher achievement score than those using only the current online learning environment (p < .01). In addition, learners in the SDLA environment had statistically significant higher satisfaction scores than those in the current web learning environment. digital.library.unt.edu/ark:/67531/metadc28448/
Dr. Richard Price, the Marquis de Condorcet, and the Political Culture of Friendship in the Late Enlightenment
The eighteenth century saw many innovations in political culture including the rise of the public sphere where political ideas were freely and openly discussed and criticized. The new public sphere arose within the institutions of private life such as the Republic of Letters and salons, so the modes of behavior in private life were important influences on the new political culture of the public sphere. By studying the lives and careers of Richard Price and the Marquis de Condorcet, I examine the role that the private institution of friendship played in the new political culture of the late Enlightenment. During the 1780s, friendship became an important political symbol that represented the enlightened ideals of equality, reciprocity, liberty, and humanitarianism. digital.library.unt.edu/ark:/67531/metadc2888/
Home: A Memoir
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Home: A Memoir, a creative non-fiction thesis, is a memoir in the form of personal essays, each exploring some aspect of the meaning of home, how my sense of self has been formed by my relationship to home, and the inevitability of leaving home. Chapter I explores the nature of memory and of memoir, their relationship to each other and to truth, and how a writer's voice shapes memoir. Chapter II, “Paternity,” is an attempt to remember my father, resulting in renewed interest in his past and renewed awareness of his legacy. Chapter III, “Home,” is on the surface about my grandparents' house, but is really about my grandmother. Chapter IV, “Dixie,” is about my contradictory feelings for the South, and my eventual acceptance of the South's complexities. digital.library.unt.edu/ark:/67531/metadc2841/
Structuralist and interactionist perspectives of collective behavior and control of crowds.
The purpose of this thesis is to understand the concept of collective behavior from different theoretical perspectives and the policy implications they imply for the Turkish Riot Police Units. The civil disturbances in the 1960s have clearly illustrated range of problems in the domain of crowd control. This work will start with the general characteristics and the classification of collective behavior. Second, two main perspectives on collective behavior, which are the structuralist and the interactionist perspectives, will be examined respectively. The question will be asked whether these two perspectives efficiently and effectively explain the crowds and the crowd control. Finally, the other factors in crowd control will be explored, and recommendations concerning the handling of crowds in a more peaceful manner will be made. digital.library.unt.edu/ark:/67531/metadc2898/
Virtual Teams and Technology: The Relationship between Training and Team Effectiveness
The impact of training on virtual team effectiveness was assessed in five areas: communication, planning tasks and setting goals, solving problems and making decisions, resolving conflict, and responding to customer requirements. A 12-page survey was developed exploring all aspects of virtual teams. 180 surveys were distributed, 52 were returned representing 43 companies. Training led to higher effectiveness in planning tasks and setting goals, solving problems and making decisions, and conflict resolution, but not in communication and responding to customer requirements. Training may not solve all the problems that virtual teams will encounter; however, training will make the challenges easier to handle. digital.library.unt.edu/ark:/67531/metadc2824/
Two selected works for solo trumpet commissioned by the International Trumpet Guild: A structural and performance analysis with a history of the commission project, with three recitals of selected works by Arutunian, Haydn, Fasch, Chaynes and others
An historical overview of the ITG commission project is presented, as well an analysis of formal organization and significant features for two of the commissioned works: Sonata for Trumpet and Piano by Norman Dello Joio and Sonata for Trumpet and Piano by Eric Ewazen. Complete histories of all works and information concerning their premieres is chronicled. The degree of difficulty of each composition is assessed through an investigation of tessitura, range, melodic contour, endurance factors, articulation, fingerings, and technical features of the accompaniment (when applicable). Analysis of tempi and dynamics, articulation and phrasing, and timbral considerations provides additional points of study. The thirteen commissioned solo works from 1978 to 1993 are: Sonata for Trumpet and Piano by Norman Dello Joio, Concerto for Trumpet and Wind Orchestra by Bernhard Heiden, Laude by Stan Friedman, Concerto for Trumpet and Strings by Raymond Premru, Chamber Music VII: Ceremonies and Chamber Music VIII by Robert Suderburg, Sonata for Trumpet and Piano by Fisher Tull, Concerto for Trumpet and Orchestra by William Schmidt, Concerto for Trumpet and Wind Ensemble by Jan Bach, Arioso for Trumpet and Woodwind Quintet by Jerzy Sapieyevsky, Invocation of Orpheus by Robert X. Rodriguez, Triptych by David Sampson, and Sonata for Trumpet and Piano by Eric Ewazen. The importance of these works and their impact on the trumpet repertoire is assessed. Possible reasons for the acceptance of some of these works by trumpeters versus the lack of acceptance of the others are proposed. Through interviews with some of the composers, analyses of the compositions and a comparative survey of performance programs by members of the International Trumpet Guild, conclusions regarding the effectiveness of the commissioning project and its future are drawn. digital.library.unt.edu/ark:/67531/metadc2859/
Minorities, gender, managerial jobs, and income, 1960-1990
Changes in income and representation in managerial occupations is explored separately for women and men among the United States' eight largest race/ethnic minority groups for each decennial census of 1960, 1970, 1980 and 1990 to determine how much change has occurred between 1960 and 1990 in race and ethnic inequality, and in gender inequality within each race/ethnic group. Insights from gender theory are applied to minority group inequality and insights from minority group theory are applied to gender inequality with some degree of success. Economic change is uneven among the groups, with the largest specific change being the movement of women into managerial jobs. A clear pattern also emerged indicating that the higher the average representation of a minority group in managerial jobs, the greater the gap between women and men. The income of all persons with income, however, did not exhibit such a clear pattern across the different groups. digital.library.unt.edu/ark:/67531/metadc2882/
Social, Demographic, and Institutional Effects on African American Graduation Rates in U.S. Colleges and Universities.
Improving the retention and graduation of African Americans and other minority groups in higher education is an important but highly politicized issue on college and university campuses. Prior studies emphasize the relationship between minority retention and achievement, cultural diversity, and racial policies and climates at predominantly White colleges and universities in the United States. In response to the need for further research, the effects of institutional actions related to diversity, minority group and African American retention, and social integration initiatives on African American graduation rates were examined for a national sample of United States (U.S.) colleges and universities. From a potential list of 7,018 colleges and universities, 2,233 met the inclusion criteria for the study. But necessary and complete information from national directories and the census could only be found for the final sample of 1,105. After dropping 30 outliers, several multiple regression analyses identified the institutional actions, social, and demographic factors that best predicted graduation rates. Public U.S. colleges and universities located in the Midwest region had lower African American graduation rates than private colleges and universities located in the South. Higher African American graduation rates occurred in colleges and universities with Black cultural centers, higher first-year retention rates, higher women enrollment rates, a higher number of student organizations, and Division III athletic programs. Colleges and universities located in a town had higher African American graduation rates than those located in a city, suburb, or rural area. digital.library.unt.edu/ark:/67531/metadc28492/
From Lost Cause to Female Empowerment: The Texas Division of the United Daughters of the Confederacy, 1896-1966
The Texas Division of the United Daughters of the Confederacy (UDC) organized in 1896 primarily to care for aging veterans and their families. In addition to this original goal, members attempted to reform Texas society by replacing the practices and values of their male peers with morals and behavior that UDC members considered characteristic of the antebellum South, such as self-sacrifice and obedience. Over time, the organization also came to function as a transition vehicle in enlarging and empowering white Texas women's lives. As time passed and more veterans died, the organization turned to constructing monuments to recognize and promote the values they associated with the Old South. In addition to celebrating the veteran, the Daughters created a constant source of charity for wives and widows through a Confederate Woman's Home. As the years went by, the organization turned to educating white children in the “truth of southern history,” a duty they eagerly embraced. The Texas UDC proved effective in meeting its primary goal, caring for aging veterans and their wives. The members' secondary goal, being cultural shapers, ultimately proved elusivenot because the Daughters failed to stress the morals they associated with the Old South but because Texans never embraced them to the exclusion of values more characteristic of the New South. The organization proved, however, a tremendous success in fostering and speeding along the emergence of Texas women as effective leaders in their communities. The UDC was an important middle ground for women moving from an existence that revolved around home and family to one that might include the whole world. digital.library.unt.edu/ark:/67531/metadc2829/
A Study Of Correlations Between Learning Styles Of Students And Their Mathematics Scores On The Texas Assessment of Academic Skills Test
The problem of this study was to determine whether learning styles of students affect their math achievement scores on the Texas Assessment of Academic Skills Test. The research questions addressed relevant to this study were: 1. Is there a positive correlation between students' learning styles and their achievement test scores in mathematics? 2. Is there a positive correlation between specific sub group's (as deemed by the state of Texas) and gender's learning styles and their achievement test scores in mathematics? The Pearson Product Moment Correlation coefficient and the Point-biserial correlation analysis was applied to the data collected from 500 fifth grade students attending a North Texas Intermediate school. The significance level was established at the .05 level. Part of the data was the student's responses to the Learning Style Inventory by Dunn, Dunn and Price. The findings established that the learning style preferences of all students in the area of persistence significantly impacted their math achievement scores. Gender and ethnicity were mitigating factors in the findings. These learning style preferences significantly impacted achievement in the following ways: * Caucasian students' preference of a high level of persistence in completing a difficult task. * Hispanic students' preference for a warm learning environment and motivational factor of pleasing the teacher. * Afro-American students' preference for kinesthetic learning. * Female students' learning style preferences appear in: - the design of the learning environment - the need for intake of food and/or drink - a high level of responsibility - a high sense of self-motivation , of teacher and of parent motivation. * Male students' learning style preferences appear in: - a warm learning environment - a high level of responsibility - the need for intake of food and/or drink - a high sense of teacher and of parent motivation - a late morning learning In summary, the author suggests that supplying the teachers with information concerning students' learning style preferences will benefit student achievement. digital.library.unt.edu/ark:/67531/metadc2889/
Student Engagement Theory: A Comparison of Jesuit, Catholic, and Christian Universities
This research study analyzed the results of the Jesuit Universities Consortium in comparison with the results of the Catholic Colleges and Universities and the Council for Christian Colleges Consortia as measured by the 2005 National Survey of Student Engagement (NSSE) in order to determine and identify any statistically significant differences between the consortia. One-way ANOVA analyses and Tukey HSD post hoc comparisons were conducted on the data from freshmen/first year students and seniors/fourth year students on each of the five clusters of the NSSE to determine any statistically significant difference and, subsequently, the effect size of any found differences. The study found that there were statistically significant differences on the following: 1) freshmen/first year students in the Jesuit Universities Consortium and the freshmen/first year students in the Council for Christian Colleges and Universities Consortium on the NSSE cluster of Academic Challenge, 2) freshmen/first year students in the Jesuit Universities Consortium and the freshmen/first year students in the Catholic Colleges and Universities Consortium on the NSSE cluster of Enriching Educational Experiences, 3) freshmen/first year students in the Jesuit Universities Consortium and the freshmen/first year students in the Council for Christian Colleges and Universities Consortium on the NSSE cluster of Supportive Campus Environment, 4) seniors/fourth year students in the Jesuit Universities Consortium and the seniors/fourth year students in the Catholic Colleges and Universities Consortium on the NSSE cluster of Active and Collaborative Learning, and 5) seniors/fourth year students in the Jesuit Universities Consortium and the seniors/fourth year students in both of the Catholic Colleges and Universities and the Council for Christian Colleges and Universities Consortia on the NSSE cluster of Supportive Campus Environment. While statistically significant differences were found in the aforementioned analyses, effect sizes were small for all. Future research studies, including longitudinal studies, are needed to fully investigate levels of student engagement within the three consortia. digital.library.unt.edu/ark:/67531/metadc28491/
Synthesis and properties of novel cage-functionalized crown ethers and cryptands.
A novel cryptand was synthesized which contained a 3,5-disubstituted-4- oxahexacyclo[5.4.1.02,6.03,10.05,9.08,11] dodecane "cage" moiety. In alkali metal picrate extraction experiments the cryptand exhibited high avidity towards Rb+ and Cs+, when compared with the corresponding model compound. A computational study of a series of cage-functionalized cryptands and their alkali metal-complexes was performed. The X-ray crystal structure of a K+-complexed bis-cage-annulated 20-crown-6 was obtained. The associated picrate anion was found to be intimately involved in stabilization of the host-guest complex. The interaction energy between the host-guest complex and picrate anion has been calculated, and the energy thereby obtained has been corrected for basis set superposition error. digital.library.unt.edu/ark:/67531/metadc2896/
Leadership, Ascendancy, and Gender
By the year 2000 women will constitute more than 50 percent of the workforce in the United States, yet their representation in top management and executive-level positions continues to hover in the single digits. This “glass ceiling,” which is conceptualized as limiting women's advancement into these roles, has been the subject of much debate and research over the last fifteen years. As both an equal rights and key competitive issue, the topic of women and leadership is gaining ever-increasing emphasis and momentum in American corporations. Although leadership skills have been advocated as a key human capital/person-centered variable leading to managerial ascendancy for women, the empirical research directly investigating this link is virtually non-existent. This longitudinal study proposed to measure the strength of this relationship using a matched sample of male and female managers. Eighty-five subjects, from the same U.S. based health-care products corporation, had previously participated in a multirater assessment process where seven different facets of their leadership skills were evaluated. Time two data were collected on four objective measures of ascendancy: percent change in salary, number of promotions (job moves) either offered or accepted, change in number of direct reports, and change in number of indirect reports. Multivariate analysis of covariance indicated that perceived leadership ability did lead to increased ascendancy, specifically in terms of percent salary change, for the female managers, but not for the males. Multiple regressions indicated that the female managers were not rewarded, necessarily, for gender congruent behavior in this organization, while male managers did appear to be rewarded more so on that particular dimension. Implications of these findings for female managers in the workplace were discussed. digital.library.unt.edu/ark:/67531/metadc2897/
Design and Implementation of Large-Scale Wireless Sensor Networks for Environmental Monitoring Applications
Environmental monitoring represents a major application domain for wireless sensor networks (WSN). However, despite significant advances in recent years, there are still many challenging issues to be addressed to exploit the full potential of the emerging WSN technology. In this dissertation, we introduce the design and implementation of low-power wireless sensor networks for long-term, autonomous, and near-real-time environmental monitoring applications. We have developed an out-of-box solution consisting of a suite of software, protocols and algorithms to provide reliable data collection with extremely low power consumption. Two wireless sensor networks based on the proposed solution have been deployed in remote field stations to monitor soil moisture along with other environmental parameters. As parts of the ever-growing environmental monitoring cyberinfrastructure, these networks have been integrated into the Texas Environmental Observatory system for long-term operation. Environmental measurement and network performance results are presented to demonstrate the capability, reliability and energy-efficiency of the network. digital.library.unt.edu/ark:/67531/metadc28493/
Hand Amputees have an Altered Perception of Images at Arm's Length
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The preface to this collection "Dust Clouding: Ambiguity and the Poetic Image," highlights the ways in which poets such as W.S Merwin and Donald Revell use ambiguity and the poetic image to strengthen their poems and encourage equality between reader and writer. Hand Amputees have an Altered Perception of Images at Arm's Length is a collection of poems and poem like adventures. digital.library.unt.edu/ark:/67531/metadc28435/
"Being" a Stickist: A Phenomenological Consideration of "Dwelling" in a Virtual Music Scene
Musical instruments are not static, unchanging objects. They are, instead, things that materially evolve in symmetry with human practices. Alterations to an instrument's design often attend to its ergonomic or expressive capacity, but sometimes an innovator causes an entirely new instrument to arise. One such instrument is the Chapman Stick. This instrument's history is closely intertwined with global currents that have evolved into virtual, online scenes. Virtuality obfuscates embodiment, but the Stick's world, like any instrument's, is optimally related in intercorporeal exchanges. Stickists circumvent real and virtual obstacles to engage the Stick world. Using an organology informed by the work of Heidegger and Merleau-Ponty, this study examines how the Chapman Stick, as a material "thing," speaks in and through a virtual, representational environment. digital.library.unt.edu/ark:/67531/metadc28430/