500 research outputs found

    Historic Caddo Archaeological Sites in Cherokee County, Texas

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    The historic archaeology of the Caddo Indian peoples in East Texas has been the subject of considerable interest by Caddo archaeologists for a number of years. Much of that interest has been focused on the investigation of the effects of European contact on Caddo cultural traditions and practices, particularly the impact of introduced European epidemic diseases, and the impact of Spanish, French, and American colonization efforts. In recent years, another focus of Historic Caddo archaeological investigations has been on characterizing the material culture record of the different clusters of Caddo Indian sites in East Texas, most notably the study of the diversity in the decorative styles and technologies of their hand-made ceramic vessels as clues to identifying clusters of ethnically and socially related communities in the Angelina and Neches River basins that were living in the region after the mid-17th century A.D. Herein, we discuss the archaeological findings from four Historic Caddo sites in the Bowles Creek basin in Cherokee County, Texas, that have ceramic assemblages that help to better characterize the nature of what has been defined as Neche cluster sites; “a cluster is strictly a group of possibly related sites in close geographic proximity to each other” suggests that certain sites in the middle Neches River basin (and the Bowles Creek valley) are affiliated with the Neche Caddo groups, and the sites described in this article may well belong to the Neche cluster

    Computational fluid dynamics (CFD) modeling for CdTe solar cell manufacturing

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    2011 Fall.Includes bibliographical references.The CdTe solar cell manufacturing process developed at Colorado State University used a vapor source that utilized infrared heating lamps as the heating source. This was used in the initial research system that was used to develop the inline CdTe solar cell manufacturing method used in industry. This system has since been redesigned to improve its ability to function as a more versatile research tool. This thesis focuses on the modeling efforts used in the development and understanding of an embedded NiCr heating unit for the vapor source. The traditional infrared heating lamps, while effective, were inefficient. A new design consisting of a NiCr heating element embedded in to the graphite deposition crucible, was developed as a more efficient and robust replacement to the infrared lamps. Four distinct models of increasing complexity were developed using the heat transfer modeling capabilities of ANSYS Fluent. The first two models helped to determine the overall thermal uniformity and the ability of the new heating designs ability to reach the needed temperatures of the deposition processes. The third model discussed in this thesis, aided in the development of the top heater that would maintain the desired steady state temperature at the process station used to deposit CdS films. The final model developed contains a higher level of detail used to determine the validity of previous assumptions and to gain an understanding of the internal temperature profile of the completed source. This modeling effort was extended to the system used in industry. The experimental data was compared to the modeled data verifying the model accuracy. The calculated temperatures were within 2.5% of the measured temperatures. The modeling efforts of both the CSU and Abound Solar deposition systems have proved the usefulness of CFD modeling as an important tool to equipment development and characterization

    Current Research: Recent Documentation of Ceramic Vessels and Other Funerary Objects in the Titus Phase Cemetery at the Tuck Carpenter Site, Camp County, Texas

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    Recently, we had the opportunity to complete the documentation of Late Caddo period Titus phase ceramic vessels and other funerary offerings from the Tuck Carpenter site (41CP5) in the Big Cypress Creek basin in Camp County, Texas. This portion of the funerary assemblage from the site has been in the hands of R. W. Walsh since the 1960s. Unable to properly care for the assemblage, he recently donated his collection to an anonymous individual, who graciously allowed us to fully document these funerary offerings. The Tuck Carpenter site (41CP5), on Dry Creek several miles from its confluence with Big Cypress Creek, is perhaps the best known Titus phase cemetery in the Big Cypress Creek basin in East Texas. This is due to the careful analysis and reporting of the recovered funerary offerings and remains from 45 burials excavated by Robert L.Turner and R. W. Walsh between 1963-1967. More than 95 percent of the graves had the bodies of single individuals laid in an extended supine position on the floor of the pit, but two burial features had two individuals placed side by side in the burial pit

    A Mutagenic Approach to Test a Structural Model for the Self-Association of Human Plasma Vitronectin

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    Computational model and empirical study of the self-undermining proposition in job demands-resources theory, A

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    2019 Summer.Includes bibliographical references.The current conceptual model in job demands-resources (JD-R) theory contains eight propositions to explain the dual processes through which job demands and resources influence individuals' strain, motivation, and job performance. Although the theory is generally well-supported and widely-used in industrial-organizational (I-O) and occupational health (OHP) psychology literature, more research is needed to validate its two most recent propositions; that motivation and strain can lead to increases in job resources and demands through job crafting and self-undermining behaviors, respectively. The goal of this study was to test the dynamic variable relationships in the self-undermining proposition through two research methods in an academic context. First, I developed and tested a computational model of the self-undermining proposition based in JD-R theory and other psychological theories and research. Second, I collected longitudinal data from undergraduate students at two U.S. universities and analyzed the data through cross-lagged panel analyses and repeated measures multivariate analyses of variance. The results of the two methods were contradictory. Specifically, the specifications and theoretical assumptions of the computational model resulted in simulations of a perpetual loss spiral via a positive feedback loop, whereas statistical analyses of the longitudinal data did not identify or support the self-undermining proposition. Overall, the results did not support the self-undermining proposition and were influenced by several methodological limitations of this study, but these limitations and results exemplified several broader limitations of JD-R theory and suggested that the theory is currently inviable and in need of respecification

    BEYOND THE BATTLE: RELIGION AND AMERICAN TROOPS IN WORLD WAR II

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    This dissertation examines the ways in which military personnel interacted with religion during World War II. It argues that the challenges of wartime service provided the impetus and the opportunity to improvise religious practices, refine religious beliefs amid new challenges, and broaden religious understanding through interaction with those from other traditions. Methodologically, this dissertation moves beyond existing analyses that focus primarily on institutions and their representatives such as military chaplains. Instead, it explores first-person accounts left by men and women who were not part of the chaplain corps and analyzes ways in which non-chaplains engaged religion. The exigencies of war contributed to religious innovation as soldiers and sailors improvised religious practices. Lay leaders sometimes filled in to lead services as chaplains were often not available. Soldiers and sailors also modified individual religious practices such as diet, fasting, and prayer to fit the context of military service. The challenges of wartime service also led troops to refine previously held religious beliefs as well as to adopt new interpretations based on personal experiences. Soldiers and sailors often clung to whatever religious beliefs or practices they saw as potentially beneficial. Finally, religious mixing combined with social dislocation and stress to create an atmosphere in which troops questioned and reformulated their religious identities. As soldiers and sailors formed bonds with those from other traditions, it became more difficult to maintain previous assumptions rooted in suspicion and rumor about other faiths. Understanding how soldiers and sailors interacted with religion in World War II anticipates significant aspects of what many scholars have described as a religious revival in the two decades following the war. It suggests that many veterans returned to civilian life with more confidence in their own religious agency and with sharpened conceptions of what they considered religious essentials

    Major Questions, Common Sense?

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    The Major Questions Doctrine (“MQD”) is the newest textualist interpretive canon, and it has driven consequential Supreme Court decisions concerning vaccine mandates, environmental regulation, and student loan relief. But the new MQD is a canon in search of legitimization. Critics allege that the MQD displaces the Court’s conventional textual analysis with judicial policymaking. Textualists have now responded that the MQD is a linguistic canon, consistent with textualism. Justice Barrett recently argued in Biden v. Nebraska that the MQD is grounded in ordinary people’s understanding of language and law, and scholarship contends that the MQD reflects ordinary people’s understanding of textual clarity in “high stakes” situations. Both linguistic arguments rely heavily on “common sense” examples from philosophy and everyday situations. This Article tests whether these examples really are common sense to ordinary Americans. We present the first empirical studies of the central examples offered by advocates of the MQD, and the results undermine the argument that the MQD is a linguistic canon. Even worse for proponents of the MQD, we show that the interpretive arguments used to legitimize the MQD as a linguistic canon threaten both textualism and the Supreme Court’s growing anti-administrative project

    Archaeological Investigations at the Bowles Creek Site (41CE475), Cherokee County, Texas, in Early 2017

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    The Bowles Creek is a substantial Historic Caddo period Allen phase settlement on a natural rise in the Bowles Creek floodplain in the Neches River basin in East Texas. There have been several rounds of work completed at the site since it was first recorded by Stingley, including shovel testing, the excavation of 1 x 1 m units, and the remote sensing of a 2400 square meter area. In this article, we discuss the archaeological findings from work done at the site in January and February 2017

    Feng Shui and Neighborhood Development

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    Planning is a rational process where we rely on training and our five senses, but not so much on our instincts. How can we reclaim this missing element and balance the rational with the intuitive? Feng Shui provides a method for enhancing the current planning process by evaluating the physical form through observation and management of the movement of ch\u27i energy. The Feng Shui Neighborhood Evaluation checklist, created in Excel, allows the planner to examine the form of a neighborhood to assess the quality of the ch\u27i. Individual ratings are input for each evaluation point within a category. The Bagua is used to intentionally link uses in a neighborhood to those areas where the strongest supportive energy already exists. Supplementing the planning process with Feng Shui places the focus on the well-being of the residents to create greater harmony, a stronger sense of community, and a higher quality of life

    Numerical simulation of transom-stern waves

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    The flow field generated by a transom-stern hullform is a complex, broad-banded, three-dimensional phenomenon marked by a large breaking wave. This unsteady multiphase turbulent flow feature is difficult to study experimentally and simulate numerically. The results of a set of numerical simulations, which use the Numerical Flow Analysis (NFA) code, of the flow around the Model 5673 transom stern at speeds covering both wet- and dry-transom operating conditions are shown in the accompanying fluid dynamics video. The numerical predictions for wet-transom and dry-transom conditions are presented to demonstrate the current state of the art in the simulation of ship generated breaking waves. The interested reader is referred to Drazen et al. (2010) for a detailed and comprehensive comparison with experiments conducted at the Naval Surface Warfare Center Carderock Division (NSWCCD).Comment: Fluid Dynamics Video for 2010 APS Division of Fluid Dynamics Gallery of Fluid Motion include
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