Cellular materials, often called lattice materials, are increasingly receiving attention for their ultralight structures with high specific strength, excellent impact absorption, acoustic insulation, heat dissipation media and compact heat exchangers. In alignment with emerging additive manufacturing (AM) technology, realization of the structural applications of the lattice materials appears to be becoming faster. Considering the direction dependent material properties of the products with AM, by directionally dependent printing resolution, effective moduli of lattice structures appear to be directionally dependent. In this paper, a constitutive model of a lattice structure, which is an octet-truss with a base material having an orthotropic material property considering AM is developed. In a case study, polyjet based 3D printing material having an orthotropic property with a 9% difference in the principal direction provides difference in the axial and shear moduli in the octet-truss by 2.3 and 4.6%. Experimental validation for the effective properties of a 3D printed octet-truss is done for uniaxial tension and compression test. The theoretical value based on the micro-buckling of truss member are used to estimate the failure strength. Modulus value appears a little overestimate compared with the experiment. Finite element (FE) simulations for uniaxial compression and tension of octet-truss lattice materials …

Karlheinz Stockhausen’s Kathinkas Gesang als Luzifers Requiem presents mental, physical, and musical challenges that go beyond the usual expectations of an instrumentalist, extending and redefining the traditional idea of virtuosity. Using firsthand performance experience, score and recording study, and flutist interviews, this document explores the effects of some of these heightened demands and argues that the particular performance situation presented by Kathinkas Gesang brings up critical questions about the performer’s role, the nature of performance and of the musical work, and the existence of an authoritatively “authentic” interpretation. Employing an expanded definition of virtuosity that includes interpretation and encompasses both choices and actions, the document discusses the extensions of virtuosity into two main areas: first, memory; and second, staging and movement, covering both practical suggestions and larger implications. Finally, it examines how the performer’s negotiation of these challenges relates to questions about authenticity and agency. Performance is defined here as a creative and collaborative act, not attempting to duplicate previous performances or recordings, but rather to give the best realization of the piece possible in the given circumstances, according to the individual’s interpretation of the score’s directions. There is no single “authentic” interpretation, but rather a rich multiplicity of possibilities, …

The formation of state borders is often told through the history of war and diplomacy. What is neglected is the tale of how borders of seemingly peaceful and long-extant places were set. In drawing Egypt’s borders, nineteenth-century cartographers were drawing upon a well of knowledge that stretched back into antiquity. Relying on the works of Greco-Roman writers and the Bible itself, cartographers and explorers used the authority of these works to make sense of unfamiliar lands, regardless of any current circumstances. The border with Palestine was determined through the usage of the Old Testament, while classical scholars like Herodotus and Ptolemy set the southern border at the Cataracts. The ancient cartography of Rome was overlaid upon the Egypt of Muhammad Ali. Given the increasing importance Egypt had to the burgeoning British Empire of the nineteenth century, how did this mesh with the influences informing cartographical representations of Egypt? This study argues that the imagined spaces created by Western cartographers informed the trajectory of Britain’s eventual conquest of Egypt. While receding as geopolitical concerns took hold, the classical and biblical influences were nonetheless part of a larger trend of Orientalism that colored the way Westerners interacted with and treated the people …

As video capturing devices become more ubiquitous from surveillance cameras to smart phones, the demand of automated video analysis is increasing as never before. One obstacle in this process is to efficiently locate where a human operator’s attention should be, and another is to determine the specific types of activities or actions without ambiguity. It is the special interest of this dissertation to locate spatial and temporal regions of interest in videos and to develop a better action representation for video-based activity analysis. This dissertation follows the scheme of “locating then recognizing” activities of interest in videos, i.e., locations of potentially interesting activities are estimated before performing in-depth analysis. Theoretical properties of regions of interest in videos are first exploited, based on which a unifying framework is proposed to locate both spatial and temporal regions of interest with the same settings of parameters. The approach estimates the distribution of motion based on 3D structure tensors, and locates regions of interest according to persistent occurrences of low probability. Two contributions are further made to better represent the actions. The first is to construct a unifying model of spatio-temporal relationships between reusable mid-level actions which bridge low-level pixels and high-level activities. Dense …

The overall main goal of this research is to assist with the planning and creation of an ethnobotanical addition at the Heronswood Garden, a botanical garden located in northwest Washington state recently purchased by the Port Gamble S’Klallam Tribe. Methods included a three month long ethnographic study of Heronswood Garden as an official intern, and conducting a needs assessment that primarily employed participant observation and semi-structured open-ended interviews with all garden employees. Information revealed through the research includes causal issues behind a lack of community participation at the garden, elaboration on the solutions to various issues facilitated by negotiating and combining the views and opinions of the garden’s employees, and author reflections on the needs assessment report and the project as a whole. This research connects itself with and utilizes the methodologies and theories from applied anthropology, environmental anthropology, and environmental science to provide contemporary perspective into the subject of preserving or preventing the loss of biodiversity, language diversity, and sociocultural diversity.

Dating violence (DV) among young adults, specifically in college settings, is a serious issue with potential severe repercussions – both physically and psychologically – for victims of DV (DV victimization), and even financially on societal institutions as a whole. Exposure to parental intimate partner violence (IPV) has been associated with DV in young adults. Such violent behaviors appear to be associated with a recurrent pattern of aggressive thought processes, content, and arousing emotions. This study investigated the mediating effects of explicit socio-cognitive processes, through the reformulated social information processing (SIP) model, and implicit cognitive processes for exposure to parental IPV on DV perpetration and victimization, as well as the moderating effects of identification with parental figures and emotional arousal for exposure to parental IPV on predicting DV perpetration and victimization. 85 college students (men n = 23, M age = 22.29) were recruited for the study and results revealed that exposure to father-to-mother IPV predicted DV victimization, and that the interaction between exposure to father-to-mother IPV and identification with maternal figure predicted DV victimization. Conversely, identification with a parental figure negatively predicted DV victimization. The results revealed that SIP processes did not mediate the relationship for exposure to parental IPV …

In recent years, considerable concern has arisen over cross-national student’s math achievement. A number of studies focusing on eighth grade student’s math achievement have been published. However, the most important role we should consider is not only students, but also teachers. A good teaching training program could help teachers improve their teaching expertise and student’s math achievement. Moreover, most studies only focused on explained predictions of the effect between potential factors. Therefore, the purpose of this study is to implement a hierarchical linear model and cluster analysis techniques to re-examine the Trends in International Mathematics and Science Study (TIMSS) 2011 among eighth grade students in the United States (U.S.), South Korea, Singapore, and Taiwan. These techniques were applied to provide a teacher characteristics and student math achievement model and identify a new institutional typology based on the pattern of teacher characteristic types and countries. Based on these patterns and model, this study presented the findings, as well as suggestions for improving educational policies and teaching training program in, South Korea, Singapore, Taiwan, and the U.S.

Food selectivity exhibited by children with autism creates a myriad of barriers for families and children, ranging from social to nutritional. The typical approach to food selectivity is pathological. The pathological approach attempts to eliminate food selectivity through the use of techniques such as escape extinction. While successful in decreasing aspects of food challenges, such as food refusals, the pathological approach does not necessarily establish desired responses to foods or mealtimes (e.g., favorable affect, approach, generalized sampling, etc.). The purpose of the current study was to explore an alternative, constructional approach to food challenges presented by two children diagnosed with autism. This approach focuses on the development of favorable responses to food through the use of shaping. Furthermore, the shaping process involved a conceptual and procedural widening of the stimulus and response classes selected. The results of a non-concurrent multiple baseline experiment, suggest this approach was successful in expanding the number of food the children tasted and ate while maintaining favorable or neutral affect and child assent.

Since their discovery in the 1930s, polymeric foams have been widely used in the industry for a variety of applications such as acoustical and thermal insulation, filters, absorbents etc. The reason for this ascending trend can be attributed to factors such as cost, ease of processing and a high strength to weight ratio compared to non-foamed polymers. The purpose of this project was to develop an “indestructible” material made of polycarbonate (PC) for industrial applications. Due to the high price of polycarbonate, two foaming methods were investigated to reduce the amount of material used. Samples were foamed physically in supercritical CO2 or chemically with 5-phenyl-1H-tetrazole. After thermal characterization of the foams in differential scanning calorimetry (DSC), we saw that none of the foaming methods had an influence on the glass transition of polycarbonate. Micrographs taken in scanning electron microscopy (SEM) showed that foams obtained in physical and chemical foaming had different structures. Indeed, samples foamed in supercritical CO2 exhibited a microcellular opened-cell structure with a high cell density and a homogeneous cell distribution. On the other hand, samples foamed with 5-phenyl-1H-tetrazole had a macrocellular closed-cell structure with a much smaller cell density and a random cell distribution. Compression testing showed …

While many investigations have been performed to establish a better understanding of the effects that magnetic fields and nanoparticles have on cells, the fundamental mechanisms behind the interactions are still yet unknown, and investigations on concurrent exposure are quite limited in scope. This study was therefore established to investigate the biological impact of concurrent exposure to magnetic nanoparticles and extremely-low frequency magnetic fields using an in-vitro CHO-K1 cell line model, in an easily reproducible manner to establish grounds for further in-depth mechanistic, proteomic, and genomic studies. Cells were cultured and exposed to 10nm Fe3O4 nanoparticles, and DC or low frequency (0Hz, 50Hz, and 100Hz) 2.0mT magnetic fields produced by a Helmholtz coil pair. The cells were then observed under confocal fluorescence microscopy, and subject to MTT biological assay to determine the synergistic effects of these concurrent exposures. No effects were observed on cell morphology or microtubule network; however, cell viability was observed to decrease more drastically under the combined effects of magnetic field and nanoparticle exposures, as compared to independent exposures alone. It was concluded that no significant difference was observed between the types of magnetic fields, and their effects on the nanoparticle exposed cells, but quite clearly there are …

The goal of this project was to reduce processing time for forensic DNA testing without incurring significant added costs and/or the need for new instrumentation, while still generating high quality profiles. This was accomplished by: 1) extraction normalization using the ChargeSwitch® Forensic DNA Purification Kit such that a small range of DNA concentrations was consistently obtained, eliminating the need for sample quantification and dilution; 2) developing fast PCR protocols for STR primer sets using shorter amplification methods, low volume reactions and non-fast thermal cyclers; and 3) developing a quicker 3130xl Genetic Analyzer detection method using an alternative polymer/array length combination. Extraction normalization was achieved through a reduction in bead quantity, thereby forcing an increase in bead binding efficiency. Four products (AmpliTaq Gold® Fast PCR Master Mix, KAPA2G™ Fast Multiplex PCR Kit, SpeedSTAR™ HS DNA Polymerase and Type-it Microsatellite PCR Kit) were evaluated for low volume (3μl) fast PCR on a 384-well Veriti® thermal cycler with the Identifiler primer set. KAPA2G™ was selected for 3μl fast PCR protocols using PowerPlex 16 HS and Identifiler Plus primer sets (42-51min), as well as 5μl and 6μl Identifiler fast reactions on a 9700 thermal cycler (51-60min). Alternative detection (POP-6™/22cm) achieved 24-28min run times, but …

This dissertation provides a feminist restorative model of environmental justice that addresses the injustices found within UNICOR’s e-waste recycling operations. A feminist restorative environmental justice challenges the presupposition that grassroots efforts, law and policy, medical and scientific research, and theoretical pursuits (alone or in conjunction) are sufficient to address the emotional and relational harm of environmental injustices. To eliminate environmental harms, this model uses collaborative dialogue for interested parties to prevent environmental harm. To encourage participation, a feminist restorative model accepts many forms of knowledge and truth as ‘legitimate’ and offers an opportunity for women to share how their personal experiences of love, violence, and caring differ from men and other women and connect to larger social practices. This method of environmental justice offers opportunities for repair, reparation and reintegration that can transform perspectives on criminality, dangerous practices and structures in the PIC, and all persons who share in a restorative encounter.

Video message delivered by United States Senator John Cornyn for the 2015 UNT Open Access Symposium, hosted by the UNT Dallas College of Law.

Article on the fear of negative evaluation and differences amongst librarians.

This dissertation focuses on three of Busoni’s late orchestral works known as “orchestral elegies”: Berceuse élégiaque (Elegie no. 1, 1909), Gesang vom Reigen der Geister (Elegie no. 4, 1915), and Sarabande (Elegie no. 5, 1918-19). The study seeks to provide a better understanding of Busoni’s late style as a crucial bridge from late nineteenth-century chromaticism in the works of Liszt, Wagner, and others to the post-tonal languages of the twentieth century. At the heart of this study lies a particular concept that forms the basis of many characteristic features of Busoni’s late style, namely the concept of polyphonic harmony, or harmony as a cumulative result of independent melodic lines. This concept is also related to a technique of orchestration in which the collective harmony is sounded in such a way that the individual voices are distinct. In the highly personal tonal language of Busoni’s late works, passages often consist of a web of motives weaved throughout the voices at the surface level of the music. Linear analysis provides a means of unravelling the dense fabric of voices and illustrating the underlying harmonic progressions, which most often consist of parallel, primarily semitonal, progressions of tertian sonorities. Chapter 1 provides a backdrop …

In recent years a great deal of interest has been focused on the synthesis of transitional metal (e.g. Ag, Cu, Fe, Au) nanosystems at the surface to sub-surface regions of Si and SiO2 matrices for fundamental understanding of their structures as well as for development of technological applications with enhanced electronic and optical properties. The applications of the metal nanoparticle or nanocluster (NC) systems range from plasmonics, photovoltaic devices, medical, and biosensors. In all of these applications; the size, shape and distribution of the metallic NCs in the silicon matrix play a key role. Low energy ion implantation followed by thermal annealing (in vacuum or gas environment) is one of the most suitable methods for synthesis of NCs at near surfaces to buried layers below the surfaces of the substrates. This technique can provide control over depth and concentration of the implanted ions in the host matrix. The implanted low energy metal ions initially amorphizes the Si substrates while being distributed at a shallow depth near the substrate surface. When subject to thermal annealing, the implanted ions agglomerate to form clusters of different sizes at different depths depending upon the fluence. However, for the heavier ions implanted with high fluences …

Cardiovascular disease is the leading cause of death in the United States. Chronic short sleep duration is also a significant public health problem and has been linked to several markers and outcomes of cardiovascular disease. To date, inconsistency of assessments of sleep duration and insufficiency, use of covariates, and cardiovascular disease measurement across studies limits strong conclusions about the relationship between sleep duration, sleep insufficiency, and cardiovascular disease. The current study examined the association between sleep duration, sleep insufficiency, and a marker of preclinical coronary heart disease (i.e., carotid intima-media thickness) in a community sample using a cross-sectional design. Some evidence for a relationship between sleep duration and cIMT was found, with longer sleep duration predicting higher cIMT in some segments. Additionally, the interaction between sleep duration and sleep insufficiency was significant. However, neither of these effects were significant after adjusting for age and in some cases race/ethnicity, suggesting demographics may explain this association. Actigraphy and sleep diary duration assessments demonstrated significantly different correlations with cIMT in some segments, suggesting the nature of the assessment method may impact the strength or direction of the relationship between sleep duration and cIMT. Limitations and future directions are discussed.

The goal of this dissertation is not only to introduce the unique cadenza by Alkan but also to offer an argument from the performer’s point of view, for why Alkan’s cadenza should be considered when there exists a cadenza by Beethoven himself, not to mention those by a number of other composers, both contemporaries of Beethoven and later. Information in reference to the brief history of the cadenza and the pianoforte in the time of Mozart and Beethoven is presented in Chapter 2. A brief bibliography about Alkan is presented in Chapter 3. Chapter 4 describes not only the cadenza in the era of Alkan, but also a comparison which is presented between Beethoven and Alkan's cadenzas. Examples of the keyboard range, dynamic contrast, use of pedal and alternating notes or octaves, and creative quote are presented in Chapter 4. In conclusion, the revival of Alkan's cadenza is mentioned, and the author's hope to promote the Alkan's cadenza is presented in Chapter 5.

The Barnett shale basin, the largest onshore gas field in the state of Texas, mainly produces natural gas. The basin’s oil and gas productions have dramatically increased over the past two decades with the enhancement via shale fracturing (fracking) technology. However, recent studies suggest that air emissions from shale fracking have significantly contributed to the growing air pollution problem in North Texas. In this study, air emissions from the Barnett shale basin during the production phase of the oil and gas activities (once the product is collected from the wells) are quantified. Oil and gas production data were acquired from the Texas Railroad Commission for the baseline years of 2010 through 2013. Methodology from prior studies on shale basins approved by the Texas Commission on Environmental Quality was employed in this study and the emission inventories from the production phase sources were quantified. Accordingly, the counties with the most gas operations in the basin, Tarrant, Johnson, Denton and Wise, were found to be the highest emitters of air pollutants. Tarrant County was responsible for the highest emitted NOx (42,566 tons) and CO (17,698 tons) in the basin, while Montague County released the maximum VOC emissions (87,601 tons) during the study …

The archaeology of the Northern Rio Grande region of New Mexico has recently received an increased amount scholarly attention. In particular, understanding past trends in demographics, agricultural productivity, violence, and social networks have been primary goals of archaeological research. Understanding patterns in animal exploitation has, however, received far less attention due to a small yet growing regional zooarchaeological database. Through the identification of animal remains from a site called Ponsipa (occupied ca. A.D. 1300 to 1600), this thesis adds one large dataset to this growing database. In addition, this thesis expands on the pre-impoundment distribution of an endangered native freshwater fish species in the state of New Mexico called the blue sucker (Cycleptus elongatus). The blue sucker is a unique fish that is currently experiencing range reduction across all of its known North American distribution due to anthropogenic habitat fragmentation and degradation. Skeletal remains that were identified from Ponsipa represent the farthest known northern record of its occurrence in the state of New Mexico and highlight the extent of range restriction of the species in the area. The data concerning the historical biogeography of the blue sucker from Ponsipa have implications for the effective conservation and restoration of blue sucker …

Research has illustrated the interrelatedness of childhood physical fitness and psychological wellbeing, psychological wellbeing and academic achievement, as well as physical fitness and academic achievement. In this study, we proposed that psychological wellbeing (self-esteem and depression) serves as a mediator between physical fitness and academic achievement during adolescence. In a sample of middle school children (N = 1,530), significant correlations were found between all three variables (p.0001). A hierarchical regression analysis was performed to assess the associations between physical fitness, psychological wellbeing, and academic achievement. The regression analysis reported a significant partial mediation effect. The results of this study supported the proposed hypotheses, including a mechanism of psychological wellbeing partially mediating the relationship between physical fitness and academic achievement. The findings of this study support the importance of encouraging activities to promote both physical fitness and psychological wellbeing in schools.

Throughout its current range, the Cross Timbers forest ecosystem is vulnerable to land-use change. In this study, we examined the surrounding land use matrix on the vegetation structure, composition and regeneration of six Cross Timbers forest fragments in Denton County, Texas (north of the Dallas-Fort Worth metroplex). Two fragments adjacent to agricultural land, two to residential neighborhoods, and two formally protected forest sites were selected. In summer 2015, five 100 m2 plots were randomly established in each fragment at least 200 meters from the edge. In each plot, all live and dead trees ≥ 3 cm diameter were identified and their height and diameter at breast height (DBH at 1.3 m aboveground) measured. Evidence of dumping (presence of trash) was recorded as an index of human frequentation. Differences in vegetation structure among the forest fragments were found. Most notably, fragments adjacent to agriculture contained 25% to 50% fewer trees per hectare than all other sites (Kruskal-Wallis, p < 0.02), especially trees <10 cm DBH. However, residential fragments had fewer trees that were ≥15 cm DBH compared to the other fragments, indicating that these are the youngest of the forest patches surveyed. Trash was observed in 60% of plots surveyed at …

Before 1984, nearly 975 of teachers entered the teaching profession after graduating from a traditional university-based program. However, beginning in the mid-1980s, alternative routes leading to teacher certification began to emerge in the United States. As of 2010, nearly one-third of all new teachers graduated from an alternative preparation program. As alternative certification (AC) routes approach 30 years since establishment, programs continue to evolve and increase in enrollment. This study focused on the changes that have come about in the maturation of alternative certification programs in Texas since legislation was passed in 1985. The purpose of the study was to delineate the evolution of AC programs using a historical approach, the study used both primary and secondary resources as research tools and employed the use of eight interviews and the literature review for the collection of data. The prediction of future teacher shortages, the need for diversity in the profession the political view to privatize education, and economic recessions were all motivating factors for establishing alternative teacher programs. In the beginning, graduation from AC programs were perceived as not authentic teachers and not as prepared for teaching as graduates from traditional programs. AC programs have become a legitimate and viable …

The ritual music written for the Compline service of the Liturgy of the Hours, Into Your Hands, is analyzed using an ontological and phenomenological approach, which seeks to answer how such sound/musical phenomena wed to the specific ritual dynamics of Compline in their own right can create a potential for encounter with the Divine. The Jewish philosopher Martin Buber’s understanding of encounter is used to show that the sound/musical phenomena in itself bears similarities with the nature of the Judeo/Christian God, and such a nature is revealed to be both irreducibly non-conceptual as well as an entity that establishes the ontological actuality of one’s being. Studies in the beginnings of humanity at large as well as the beginnings of the individual fetus reveal that an integrated expression of music and ritual can be said to have formed the impetus of such ontological beginnings through encounter. Therefore, one of the first sounds heard in the womb - that of water (or amniotic fluid) - constitutes what may be an archetypal sound of encounter. The phenomenological effects of such an archetype are analyzed in the music of Into Your Hands through topics such as the loss of aural perspective, immersion, dynamic swells, …