Digital Commons Network^™

Temper-Bead/Half-Bead/Control Deposition Repair Welding Techniques Used For Low Alloy And Cr-Mo Steels, Yumin Wang

Masters Theses

Half-bead/temper-bead/controlled deposition repair welding techniques, which utilize the thermal cycles of the second and later weld layers to temper and refine the HAZ of the first layer, have been applied in accordance with ASME Boiler and Pressure Vessel Code Section XI for inservice repair welding of nuclear power plant components. Thus Postweld Heat Treatment (PWHT) may be omitted without causing degraded properties of the component; especially the base metal HAZ. The University of Tennessee, Knoxville (UTK) joined hands with the Ontario Hydro Company in May 1989 to conduct research on the Temper-Bead welding techniques employed in Cr-Mo and low alloy …

A Literature-Based Approach To Reading, Cheryl L. Lester

Masters Theses

This study examined the impact that a primarily literature-based reading program had on a third grade class in becoming proficient independent readers and writers. Using authentic literature, students were taught reading content, prioritized strategies, and necessary reading skills. Progress was assessed using theme tests, periodic reading surveys, skills surveys, observation checklists and forms, student portfolios, and standardized tests.; The results of this study indicated that a primarily literature-based approach inspired and motivated children to become successful readers and writers. The literature produced, emphasized, and enforced positive learning experiences. The assessments used demonstrated that the class became stronger and more enthusiastic …

Perceptions Of Current Club Managers Regarding College Coursework Necessary For Preparation For A Career As A Club Manager, Candice E. Clemenz

Masters Theses

The purpose of this research was to gather and interpret the perceptions of current club managers regarding the college coursework that they believed was necessary to prepare a student for a career as a club manager. First, a list of course areas was developed via a review of hospitality curriculums, and conversations with industry professionals. The list was used to design Part 1 of a questionnaire that featured 13 course areas with corresponding descriptive and ascending levels of competencies. Instructions clearly directed club managers to select the highest level of competency for each course area that they thought should be …

White-Tailed Deer Crown Height Measurements And Mortality Profiles From The Hayes Site, Middle Tennessee, Renee Beauchamp

Masters Theses

Previous research at the Hays Site (40ML139) prompted an investigation of white-tailed deer remains from the site. An evaluation of aging techniques revealed that the dental crown height measurement technique is the best method for aging white-tailed deer. A regression formula was developed with a known-age sample of Mississippi white-tailed deer. An investigation of mortality profile interpretations defines attritional, living structure, and prime-dominated mortality profiles. The mortality profile interpretations are used to define seasonality and hunting intensity for the white-tailed deer from the Hayes site. A modified iterated age length key is used to derive mortality profiles. Results for hunting …

Wastewater Treatment Using A Constructed Wetland And Recirculating Gravel Filter System, Gregory Lynn Askew

Masters Theses

The use of constructed wetlands (CW) and recirculating gravel filters (RGF) as a wastewater treatment system was demonstrated at a municipal treatment plant. The demonstration was a proof-of-concept test for the use of RGFs to treat CW effluent for ammonia. Inadequate ammonia conversion by nitrification is characteristic of most CWs in operation. Additionally, total nitrogen removal was planned by discharging the nitrified RGF effluent at the head of the CW which was typically anoxic. Three existing CWs (two free water surface and one subsurface flow), each with an area of 1.46 ha, were used to treat effluent from a 6.47 …

In-Line Monitoring Of Filler Content In Polyethylene Terephthalate Extrusion Using Near Infrared Spectroscopy, Jitender Batra

Masters Theses

Viability of using NIR spectroscopy for in-line composition monitoring of polymeric system was demonstrated. Spectroscopic measurements were made in-line, at the exit port of a single screw extruder and a gear pump. System of polyethylene terephathalate (PET) filled with an inorganic filler, titanium dioxide (TiO₂), was the subject of study. Various mixtures of filled and unfilled PET resins, in increments of 10%, were run through the extrusion system. The spectral data, in the wavelength range of 1200 nm to 2400 nm, was collected on the flowing polymer stream. Presence of inorganic filler caused the scattering of light. The …

Polymer-Supported Reagents Utilized In The Synthesis Of Radiopharmaceuticals, Karla Renee Bowers

Masters Theses

Single Photon Emission Computed Tomography (SPECT) is a medical imaging technique which provides three-dimensional images of living systems after infusion of radiolabeled chemical compounds. These radiolabeled pharmaceuticals must be synthesized and delivered to the patient quickly to ensure that loss of the radiolabel is minimal. This means that the synthesis and handling of the imaging agent should be efficient and as simple as possible. Current methods of radioiodination involve lengthy purification techniques usually via column chromatography. The use of polymer supported hydrides for radioiodinations could eliminate the need for such purifications by making possible the removal of polymer-bound by-products by …

An Experimental And Computational Investigation Of The Flowfield About An Aeroassisted Space Transportation Vehicle At Mach 10, Thomas P. Dye

Masters Theses

A combined experimental and computational investigation of the flowfield about an Aeroassisted Space Transportation Vehicle (ASTV) has been performed. The configuration examined was a 70° sphere cone with a cylindrical afterbody at nominal Mach 10, perfect gas conditions. The experimental portion of the investigation was performed in the NASA Langley 31-Inch Mach 10 Tunnel at zero degrees angle of attack. Reynolds number behind the normal shock, based on the forebody diameter was nominally 14,950. Measurements of surface pressure and heat transfer were made on the ASTV forebody, base, and on a cylinder in the near wake. The computational portion of …

Characterization Of Activated Carbon Adsorption Applied To A Thin Bed System, Christopher Charles Hood

Masters Theses

Research has been conducted by Textiles and Nonwoven Development Center (TANDEC) and the University of Tennessee Civil and Environmental Engineering Department to investigate the possible use of non-woven materials impregnated with activated carbon as a potential liner for chemical warfare suits. The objectives of this thesis were to evaluate the breakthrough time and capacity of these materials in a bench scale adsorption system, and then conduct preliminary modeling of the system using existing adsorption theory. The theory is based on the adsorbent and adsorbate following a Freundlich type isotherm of the form:

C_e = α (X_sat)^{β …}

Assessment Of Living Level Indoor Radon In Detached Single-Family Homes In The Coastal Plains Town Of Freehold, New Jersey, David A. King

Masters Theses

Indoor radon levels are influenced by underlying geology, ventilation rates, indoor environments, building structure, and many other variables that must be taken into account when predicting where the highest levels may occur. To uncover which factors have the greatest influence in Freehold, New Jersey, alpha track detectors were exposed in 125 detached dwellings for three months. Houses in Freehold were found to have indoor radon levels with a geometric mean of 2.8 pCi/L which is well above the national aver average of 1 pci/L. Statistical tests determined that the factors that most contribute to high indoor radon levels in Freehold …

The Effects Of Limiting The Domain Pool Size On Fractal Image Compression, Robert William Mauck

Masters Theses

Fractal image compression describes an image by storing the relationship between different regions of an image in the form of contractive affine transforms. This technique provides extremely high compression rates while maintaining good image fidelity and rapid access to the image. The disadvantage of this technique is the intensive computational requirements for image compression. Computational requirements can be reduced by minimizing the number of comparisons that must be made.

A set of domains and ranges were defined over each image compressed. For each range a domain pool was defined consisting of all domains within a given distance (in pixels) from …

Effect Of Lead On Globin Mrna In Vivo And In Vitro, C. A. Aethranis

Masters Theses

The total amount of mRNA recovered from Pb²⁺-treated rabbits was not significantly influenced by lead but dose-dependent loss of template activity of the poly A+ fraction was observed. These observations lead to the conclusion that the messenger RNA of rabbit reticulocytes exposed to Pb²⁺ in vivo was damaged and inactivated without extensive depolymerization of the mRNA.

In vitro experiments on the effect of Pb²⁺ on purified rabbit globin mRNA were also performed. After incubation with Pb²⁺ at micromolar concentrations, the 7-methyl guanosine cap was removed from the mRNA, while damage to the remainder of the …

Effect Of Lead On Globin Mrna In Vivo And In Vitro, Ca Aethranis

Masters Theses

The total amount of mRNA recovered from Pb²⁺-treated rabbits was not significantly influenced by lead but dose-dependent loss of template activity of the poly A+ fraction was observed. These observations lead to the conclusion that the messenger RNA of rabbit reticulocytes exposed to Pb²⁺ in vivo was damaged and inactivated without extensive depolymerization of the mRNA. In vitro,/u> experiments on the effect of Pb²⁺ on purified rabbit globin mRNA were also performed. After incubation with Pb²⁺ at micromolar concentrations, the 7-methyl guanosine cap was removed from the mRNA, while damage to the remainder of the …

Modelling Bone Fracture Behavior : The Case For Fuzzy Logic, Taisuke Akasaka

Masters Theses

This thesis, entitled "Modelling Bone Fracture Behavior: The Case for Fuzzy Logic," is based on the laboratory experiments for the research project sponsored by Japan Automobile Manufacturers' Association (JAMA). The ultimate research goal is focused to develop an advanced computer code that can simulate bone fracture behaviors under impact loading. To seek possible approaches and determine the one best capable of describing bone fracture behaviors as efficiently and accurately as possible, a number of theories and methods are researched here. In this thesis, the basics of impact fracture mechanics, finite element method for crack simulation, and fuzzy logic theory are …

A Microcontrolled Input-Output Device For A Personal Multimedia Machine, Richard Paul Beam

Masters Theses

This thesis describes both the design and the design process for a unique input and output device intended to be part of a consumer multimedia machine. Because of the peculiar demands of the multimedia machine, "off the shelf" solutions did not exist. The configuration of this design is a quality analog joystick for input and a series of LED displays for output. The input and output systems are controlled by a single microcontroller which interfaces to the host machine via an RS-232 asynchronous communications channel. Surface-mount components were used in its construction to minimize size and weight, which were critical …

Classroom Learning Environment And Student Achievement In An Enlisted Professional Military Education Environment, Pattie S. Boring

Masters Theses

This study examined the difference in academic performance between two groups of enlisted Professional Military Education (PME) students attending the Noncommissioned Officer Academy (NCOA). One group consisted of students who perceived their actual learning environment to be very similar (congruent) to their ideal learning environment. The other group consisted of students who perceived their actual learning environment to be very dissimilar (divergent) to their ideal learning environment. In addition age and gender differences were compared for both groups. The subjects of this study were initially 74 enlisted Air Force sergeants. Each participant completed the Ideal and Actual Versions of the …

Identification Of Temperate Rainforest Environments In The Southern Appalachians, Michael J. Daly

Masters Theses

The natural vegetation of the Southern Appalachian region included exceptional cove forests exhibiting characteristics typically associated with temperate rainforest formations. Human impacts over the past few centuries have almost completely eliminated these exceptional forests. The distribution of environments capable of supporting these forests is controlled regionally by climate, and locally by topography. The Thornthwaite climatic classification is applied in the context of a GIS to identify the regional extent of the temperate rainforest (perhumid) climate under both average and drought conditions. A GIS database incorporating manually-derived topographic data and land use and forest vegetation data derived from a 1990 Landsat …

An Accessibility Evaluation Of Selected East Tennessee State Parks For Use By Persons With Disabilities, Chase Ezell

Masters Theses

Parks should be developed and available for persons with disabilities. 4. An extensive training effort should be implemented for park rangers/managers to educate personnel on the minimum guidelines for accessibility within state parks. 5. Accessible programming within state parks should be evaluated.

Design Of An Aluminum Powder Combustor For Simulating The Combustion Conditions In Solid Rocket Motors, Robert John Geierman

Masters Theses

This research presents the design of a combustion device which will simulate the aspects of aluminum particle combustion inside a solid rocket motor. At the same time this combustor will allow optical data to be collected during the combustion process.

The first step in this combustor design was to examine past experiments and methods which have been used to examine the combustion of aluminum particles. Next, the fuels and oxidizers, which will be used in the first planned combustion experiments, were selected. The flame temperatures and transport properties of these fuels and oxidizers were calculated using a version of a …

Development Of A Hypercard-Based Graphical Users Interface Program For Implementing Liquid Rocket And Test Facility Component Performance Models, Stephen Douglas Howard

Masters Theses

This project involved the development of a graphical users interface (GUI) that linked a thermal properties data subroutine to liquid rocket component performance models. Three generic liquid rocket engine components were selected to demonstrate the computer program and its interactive interface. These components were a pump, a valve, and a propellant tank. The program, entitled LRE-CP², combines a modified thermophysical properties routine with a graphical user interface (GUI) using shell-based stacks created using Hypercard® software. The user enters a set of required conditions for a given component on a CRT screen in a screen specific format, and the …

The Importance Of The Residual Layer In Characterizing Ozone Episodes In East Tennessee, Eric Kevin Hutton

Masters Theses

This thesis was written to characterize episodes of high concentrations in East Tennessee. The trajectory ozone analysis of high pressure air masses revealed that the trajectory of a high pressure system impacting East Tennessee was not as important as whether the system stagnated. Four ozone episodes have also been analyzed. In May 1992, stations representative of the residual layer observed an excellent example of a nocturnal increase of ozone due to regional transport that contrasted a simultaneous decrease in ozone concentrations at nearby low altitude monitors. Using ozone isopleth maps and comparisons of individual stations representative of the residual layer …

Design Of Saturn Automotive Plastic Door Panels For Assembly, Barton Kirk Ideker

Masters Theses

This project was an investigation of new methods for attaching Saturn plastic automobile door panels to metal frames. The design emphasis was on assembly. The current Saturn door attachment process was considered too slow and labor intensive. Three new attachment schemes were devised--the sliding concept, the flexing concept, and quarter-turn fastener concept. The sliding and the flexing concepts were designed in detail, prototyped and tested. A detailed design was not necessary for the quarter-turn concept due to the commercial availability and wide-spread use of these fasteners. The sliding and flexing prototypes were refined to a level where assembly simulations could …

Properties And Site Substitutions For Ternary Chromium Additions To B2 Iron Aluminides, Sanjeev Khosla

Masters Theses

The equiatomic and iron-rich ordered iron aluminides are potential medium temperature materials because of their low cost and good elevated temperature properties. However, their chief drawback is their brittleness at room temperature. Attempts have and are being made to increase their ductility by alloying. It has also been established that the site preference of the ternary element could affect the mechanical properties of these aluminides. A study was made of the site substitution of Cr in the B2 FeAl using the variable x-ray energy of a synchrotron source. Seven compositions were chosen of which three were binary FeAl alloys. It …

The Design, Fabrication, And Testing Of A Centrifuge For Laser Materials Processing Under Enhanced Gravity Conditions, Cindy R. Mckowen

Masters Theses

A simple, cost-effective centrifuge for use in an enhanced gravity laser materials processing system was developed. This system is capable of producing an acceleration normal to the sample surface ranging from 2g_e to 10g_e Design constraints include a maximum resultant acceleration of 10g_e and a beam delivery system which is capable of using either a CO₂ or Nd:YAG laser system as the energy source. The available process diagnostics include photodiodes, thermocouples, a CCD camera, and accelerometers in three axes.

An experiment was run to test the system and determine the effect of gravity on the weld …

The Development Of A Ground Proximity Warning System For United States Navy Strike-Fighter Jet Aircraft, Richard Michael Manski

Masters Theses

This research attempted to develop guidelines for the development of a Ground Proximity Warning System (GPWS) for United States Navy strike- fighter jet aircraft in an effort to reduce the incidence of controlled flight into terrain. A review of GPWS technology development and capabilities was conducted, as well as an overview of previous and on-going GPWS projects. A GPWS algorithm development began in the Fall of 1991 and began developmental test in the Naval Air Warfare Center/Aircraft Division (NAWC/AD), Manned Flight Simulator (MFS) in the Spring of 1992. Simultaneously, the pilot vehicle interface developmental testing began at the NAWC/AD Aircrew …

Evaluation Of A Submicron Particulate Monitor, Jack Leland Parker

Masters Theses

A Sample Extraction / Dilution System (SEDS) was built at The University of Tennessee Space Institute (UTSI) to measure particle size distributions and mass loadings in a high number density environment The SEDS extracts a sample of particle laden gas from a high particle concentration environment and dilutes it while preventing acid and water condensation. After dilution, a commercially available particle sizing instrument can be used for number density and mass loading measurements. The major advantage of the SEDS over currently available techniques for measuring high loading environments is its on-line, near real-time response to particle number density fluctuations. The …

The Use Of Lemna Minor L. (Lemnaceae) As Assessor Of Water Quality In The Big South Fork River, Cumberland Plateau, Tennessee-Kentucky, Margaret Dianne Parks

Masters Theses

This research investigated the applicability of the response of Lemna minor L. as an indicative, site specific, bioassay of water quality within a riverine system. This standardized bioassay test (ASTM, 1992) does not quantify or specify pollutants, but provides a qualitative, seasonal assessment of phytotoxicity at the primary producer level of the food chain for sample sites. Our intention was to interpret the growth constraints of accessible site water collections in terms of the integrated capability of the BSF as a biotic substrate. It was concluded that Lemna minor can detect river contamination by quantifying growth responses. The method can …

Parametric Positron Emission Tomographic Imaging Using Parallel Virtual Machine : With An Example Using Myocardial Blood Flow Analysis, Christopher S. Patterson

Masters Theses

In this thesis, I integrated Parallel Virtual Machine (PVM) software (University of Tennessee and Oak Ridge National Laboratory), a state space matrix analysis package, (CtrIC, Integrated Systems, Inc., Santa Clara, OA) and an existing computer workstation network to reduce calculation times for myocardial blood flow (MBF) parametric images. Dynamic heart scanning is one of the most frequently utilized clinical procedures in Positron Emission Tomography (PET). A current drawback for physicians is a lack of quantitative data on myocardial blood flow rates for each patient. There is no baseline, no database of parametric MBF images, and no histories that can be …

Nothing That Is So Is So : Disguise And Identity In William Shakespeare's Twelfth Night And Sir Philip Sidney's The Old Arcadia, Laura Antoinette Pritchard

Masters Theses

This thesis compares Shakespeare's festive comedy, Twelfth Night, to Sir Philip Sidney's pastoral romance, The Old Arcadia, in terms of their use of disguise and mistaken identity. The characters must overcome these obstacles of mistaken identities, mistaken beliefs, and disguises so they can find their true identities and re-establish the social order that was disrupted at the beginning of each work. The two works are complementary. By examining their genres, the way they both portray nature, the social order, providence, the folly of self-love, and losing the self to find the self, I have shown that by considering these issues …

Doing Poetry : A Freireian Approach, Lisa Pollard

Masters Theses

The purpose of this study was threefold: (1) to determine whether a Freireian approach to poetry increased students' knowledge of poetry as a craft and as an art; (2) to determine whether a Freireian approach to poetry enhanced students' perceptions of poetry; (3) to ascertain to what extent, if any, a Freireian approach to poetry increased students' self knowledge and their awareness of others. To this end I conducted a case study of a group of ninth grade "basic" students at a local high school from April 16, 1993, until May 16,1993. At the end of the four weeks, I …