Plant Remains from Shelby Mound (41CP71), Camp County, Texas

Nine lots of botanical samples collected during 1988 and 1992 excavations at the Shelby Mound site (41CP71) were submitted for identification prior to their eventual curation at Stephen F. Austin State University. Some botanical samples from these excavations have been previously reported. Excavations at Shelby Mound were conducted in a 10 x 10 ft. unit divided into four 5 x 5 ft. squares. Botanical samples were recovered using 1/4-inch screen. Shelby Mound, also known as the Tracy site and the Greasy Creek site, is a large Late Caddo village, community cemetery, and mound center. Most of the community cemetery at the site was destroyed by looters more than 30 years ago

BCAUS Project description and consideration of separation of data and control

The commonly stated truths that data may be segregated from program control in generic expert system shells and that such tools support straightforward knowledge representation were examined. The ideal of separation of data from program control in expert systems is difficult to realize for a variety of reasons. One approach to achieving this goal is to integrate hybrid collections of specialized shells and tools instead of producing custom systems built with a single all purpose expert system tool. Aspects of these issues are examined in the context of a specific diagnostic expert system application, the Backup Control Mode Analysis and Utility System (BCAUS), being developed for the Gamma Ray Observatory (GRO) spacecraft. The project and the knowledge gained in working on the project are described

A study of commuter air service

A regionally oriented overview of the commuter air service industry is provided. A framework for an eventual assessment of potential technology directions that may be of benefit to the industry is presented. Data are provided on the industry's market characteristics, service patterns, patronage characteristics, aircraft and airport needs, economic characteristics and institutional issues. Using personal interview and literature survey methods, investigation of a considerable cross-section of the industry was made

Recent advances in structural technology for large deployable and erectable spacecraft

Ultra-low mass deployable and erectable truss structure designs for spacecraft are identified using computerized structural sizing techniques. Extremely slender strut proportions are shown to characterize minimum mass spacecraft which are designed for shuttle transport to orbit. Discrete element effects using a recently developed buckling theory for periodic lattice type structures are presented. An analysis of fabrication imperfection effects on the surface accuracy of four different antenna reflector structures is summarized. The tetrahedral truss has the greatest potential of the structures examined for application to accurate or large reflectors. A deployable module which can be efficiently transported is identified and shown to have significant potential for application to future antenna requirements. Investigations of erectable structure assembly are reviewed

Structural sizing considerations for large space structures

A number of missions for the space shuttle were proposed which involve placing large truss platforms on-orbit. These platforms range in size from tens of meters in span for reflector application to several thousand meters for solar power collector application. These proposed sizes and the operational requirements considered are unconventional in comparison to Earthbound structures and little information exists concerning efficient proportions of the structural elements forming the framework of the platforms. Such proportions are of major concern because they have a strong influence on the packaging efficiency and, thus, the transportation effectiveness of the shuttle. The present study is undertaken to: (1) identify efficient ranges of application of deployable and erectable platforms configured for shuttle transport to orbit, and (2) determine sensitivity to key parameters of minimum mass deployable and erectable platform designs

Confucius Institutes and Sino-American soft power diplomacy.

Since 2004, China has attempted to promote its image abroad through a number of soft power initiatives including culture and language learning programs called Confucius Institutes. Though ostensibly a nonprofit organization akin to other language teaching programs like the German Goethe Institutes, Spanish Cervantes Institutes, Alliance Française, and the British Council, the Confucius Institute has drawn scrutiny from academic and political leaders for its close ties to the Chinese government, threat to academic freedoms, and other questionable practices. This essay seeks to examine that debate, assess critical viewpoints, and offer suggestions for future research and policy direction. Using recently published reports on CI development and administration, this essay will explore how the institutes are founded and run – an aspect often overlooked in critical inquiry. Given the importance of postsecondary education in political socialization, it is understandable that many are wary of any outside influence in American universities. The lingering fear is that through soft power programs like the Confucius Institute, the Beijing-sanctioned view of politics and history will become the lens for American perception of China. Ultimately, the evidence against the Confucius Institute is often based on a notion of what could happen rather than what usually is the norm. Finally, this essay will seek to clarify criticisms that have become overdrawn, point out the most pressing structural and contractual issues, and recommend future research on the topic

Interactive modeling of enzyme-inhibitor complexes at Merck macromolecular modeling graphics facility

AbstractMerck Sharp & Dohme Research Laboratories has developed enzyme-inhibitor modeling procedures based on the convenient display and manipulation features of the FRODO crystallographic modeling program (Jones, 1978, 1982). After implementing the program on a VAX computer controlling an Evans & Sutherland Multi Picture System, we have added useful techniques such as multiple superpositions, color-coded labels and dot surfaces, and a novel real-time atomic contact display (“CLARIFI”) which emphasizes crucial repulsions while showing nonspecific binding.A synthetic chemist in Merck's New Leads Discovery Department has used these tools to develop a revised picture of the transition state and substrate specificity of the zinc protease thermolysin (Hangauer et al., 1983a). A movie illustrating the model was produced with the aid of GRAMPS (O'Donnell & Olson, 1981).Our enzyme-inhibitor modeling also makes use of links to the existing small-molecule Merck Molecular Modeling System, and to empirical energetics programs. These techniques are complementary and should be seen as tools with which a scientist can generate and test structural ideas

Plant Remains from the Washington Square Mound site (41NA49), Nacogdoches, Texas

Botanical remains were identified from 27 lots from the Washington Square Mound site (41NA49). The primary occupation at the site is Middle Caddo period in age. The first pooled set of calibrated radiocarbon dates from the site fell into the period A.D. 1268-1302, while a recent set of five calibrated dates from samples of plant remains discussed in this article range from A.D. 1279 + 17; (2) A.D. 1358 + 57; and three dates on charred corn from Features 36, 81, and 86 range from as early as A.D. 1394 to as late as A.D. 1437. These dates as a group fall in the Middle Caddo period; there is limited evidence at the site for other, smaller occupations, including Late Caddo and Late Woodland/Early Caddo. At least three mounds were visible in the nineteenth century. Much of the site was never plowed, a situation that has resulted in intact shallow deposits and unusually large pottery sherds, although a high school has been built over parts of the non-mound site area. Labels of botanical lots that included excavation dates indicate a range from 1979 to 1983, associating the botanical remains with Stephen F. Austin State University Field School excavations that took place during this time. At least nine features are represented in the botanical lots. Four are described as charcoal-filled pits, one as a pit, and one as a post mold. Feature 36 was a corn cob concentration . Botanical lots for Features 62, 81, and 199 are also present. The Washington Square Mound site is situated in the city of Nacogdoches, Texas, on an interfluve between Banita Creek and La Nana Creek, which drain into La Nana Bayou and the Angelina River. The area lies squarely in the Pineywoods ecological zone, the westernmost extension of the great Southeastern Evergreen Forest that reaches across the southeastern United States to the Atlantic coast (Braun 2001:281). The dominant vegetation type in an upland area such as Washington Square during presettlement times would have been a shortleaf pine community, where shortleaf pines (Pinus echinata) share dominance with dry-site oaks such as southern red oak (Quercus falcata), post oak (Q. stellata), and blackjack oak (Q. marilandica), hickories (Carya spp.), and elms (Ulmus spp.) Springs and marshy areas nearby would have offered aquatic and wetland plants such as river cane (Arundinaria gigantea). A spring-fed pond is reported to have existed north of the site, and a marshy area to the southwest. Pollen studies indicate that use of the modern and recent vegetation is appropriate for understanding the plants and attendant animal resources available to occupants of the sites during prehistoric times. Some fluctuations in rainfall and temperature have taken place, however. In addition, more frequent fires would have made the understory in the uplands less prominent than today. Early explorers in East Texas and other parts of the Eastern Woodlands noted the open, park-like nature of many woodlands

THE ALLOCATION OF STATE APPROPRIATIONS AND STUDENTS ACROSS DIFFERENT TYPES OF PUBLIC INSTITUTIONS OF HIGHER EDUCATION

Public higher education has evolved over time under the control of each individual state. The public system in each state is made up of distinctive types of institutions that together provide higher education in different formats. Public institutions may largely be classified into three groups based on the level of education provided including community colleges, regional institutions, and research universities. While the institutions employed are largely the same in each state, the extent to which each is utilized and the support given reflect the individual characteristics of the state. This dissertation examines appropriations and enrollments by state and year in three classifications of universities: research universities, regional universities, and community colleges. The appropriations and enrollments in regional and community settings are measured relative to the same for research universities. The explanatory variables are political, economic, and demographic variables relevant in state finance to the allocation of state budgets. There are three empirical chapters. The first uses Granger causality concepts to examine whether appropriations and enrollment have strong predictive effects on each other in the following year. Enrollment has no such effect on appropriations, while there is a weak effect the other way. The second chapter studies relative appropriations, finding that the proportion of appropriations allocated to regional institutions has remained consistent, while states have proportionally shifted toward community colleges. The third chapter studies enrollment, which is very stable for regional universities and has shifted toward community colleges relative to research universities. Again, political and economic factors are somewhat different in these models. Examining year effects net of economics and politics, there are no such effects on appropriations; but for enrollment, regional universities grew somewhat relative to research universities in the earlier years (1986 to 1993), and community colleges grew throughout the period with pauses. The Great Recession is clearly visible in community college enrollments, growing as usual during an economic downturn