Exchange Place: Development of the Commercial Frontier

The archaeological study of early commercial sites and their contribution to regional development has been lacking, particularly in the Upland South. As an adaptive response of an expanding society, these sites originated through specific cultural and historical factors. Via these locations moved people, information, and consumer goods. These sites were strong integrative forces in frontier development and served as infrastructure for an expanding society. A better understanding of the active role that commercial sites played in local and regional development is presented. This is accomplished by a historical, archaeological, and geographical study of the Exchange Place (40SL22), Kingsport, Tennessee. Following a discussion of the historical and archaeological background of the Exchange Place, 1996 testing at the site is evaluated for information pertaining to site history and location of archaeological features. This research will examine the cultural manifestations of the commercial activity at the Exchange Place and the farmstead\u27s commercial development as a manifestation of cultural processes and regional development. The antebellum commercial farmstead is offered as a unique site that characterizes the Exchange Place and possibly other historic sites with similar commercial histories. The site will then be contextualized within southern Appalachia, a newly formed United States, and a growing capitalist world­-system

Bioanalytical Applications in the Near -Infrared Region Using Fluorescent Covalent and Non-Covalent Probes With Near-Infrared Fluorescence Detection.

The research presented in this dissertation entails the preparation, characterization, and analytical application of a series of novel tricarbocyanine, phthalocyanine, and napthalocyanine dyes which can be used as fluorescent probes for bioanalytical assays. The first part of this research focuses on the synthesis of a nuclear staining tricarbocyanine dye used for low-level detection of DNA restriction fragments separated via capillary electrophoresis. The second part focuses on the synthetic, purification, and applications of several tricarbocyanine, phthalocyanine, and naphthalocyanine dyes. The tricarbocyanine dyes were synthesized to contain a heavy atom-modification to enhance k isc through spin-orbit coupling and a reactive functional group to react with primary amines of various biomolecules. The heavy-atom modified tricarbocyanine dyes also possessed similar absorption and emission maxima as well as similar electrophoretic mobilities, but they have unique fluorescence lifetimes. Like the tricarbocyanine dyes, the phthalocyanine and naphthalocyanine dyes were also synthesized to contain a reactive group for facile conjugation to various biomolecules. The methodology for these dyes will be used for base-calling in DNA sequencing involving the use of a single-lane CGE separation of the near-infrared (near-IR) dye-labeled DNA fragments with the terminal bases identified via fluorescence lifetime discrimination

Assessment of semicircular canal function. Part 1 - Measurements of subjective effects produced by triangular waveforms of angular velocity

Nystagmus and sensation of rotation from semicircular canal stimulation by triangular waveforms of angular velocit

Low-speed wind-tunnel investigation of the flight dynamic characteristics of an advanced turboprop business/commuter aircraft configuration

An investigation was conducted to determine the low-speed flight dynamic behavior of a representative advanced turboprop business/commuter aircraft concept. Free-flight tests were conducted in the NASA Langley Research Center's 30- by 60-Foot Tunnel. In support of the free-flight tests, conventional static, dynamic, and free-to-roll oscillation tests were performed. Tests were intended to explore normal operating and post stall flight conditions, and conditions simulating the loss of power in one engine

A GPU Implementation for Two-Dimensional Shallow Water Modeling

In this paper, we present a GPU implementation of a two-dimensional shallow water model. Water simulations are useful for modeling floods, river/reservoir behavior, and dam break scenarios. Our GPU implementation shows vast performance improvements over the original Fortran implementation. By taking advantage of the GPU, researchers and engineers will be able to study water systems more efficiently and in greater detail.Comment: 9 pages, 1 figur

An experimental investigation of the aerodynamics and cooling of a horizontally-opposed air-cooled aircraft engine installation

A flight-test based research program was performed to investigate the aerodynamics and cooling of a horizontally-opposed engine installation. Specific areas investigated were the internal aerodynamics and cooling mechanics of the installation, inlet aerodynamics, and exit aerodynamics. The applicable theory and current state of the art are discussed for each area. Flight-test and ground-test techniques for the development of the cooling installation and the solution of cooling problems are presented. The results show that much of the internal aerodynamics and cooling technology developed for radial engines are applicable to horizontally opposed engines. Correlation is established between engine manufacturer's cooling design data and flight measurements of the particular installation. Also, a flight-test method for the development of cooling requirements in terms of easily measurable parameters is presented. The impact of inlet and exit design on cooling and cooling drag is shown to be of major significance