Digital Commons Network^™

Experimental And Analytical Study Of Friction Stir Processing, Basil M. Darras

University of Kentucky Master's Theses

Friction stir processing (FSP) has recently become an effective microstructural modifications technique. Reported results showed that for different alloys, FSP produces very fine equiaxed and homogeneous grain structure. FSP is considered to be a new processing technique and more experimental and analytical investigations are needed to advance the industrial utilization of FSP. Most of the work that has been done in the friction stir processing field is experimental and limited modeling activities have been conducted. Attempts to develop a predictive model to correlate the resulting microstructure with process parameters are scarce. In this work, commercial 5052 Aluminum alloy sheets are …

Modeling And Optimization Of Machining Performance Measures In Face Milling Of Automotive Aluminum Alloy A380 Under Different Lubrication/Cooling Conditions For Sustainable Manufacturing, Abhijit Dilip Kardekar

University of Kentucky Master's Theses

The use of cutting fluids in machining process is very essential for achieving desired machining performance. Due to the strict environmental protection laws now in effect, there is a wide-scale evaluation of the use of cutting fluids in machining. Consequently, minimal quantity lubrication (MQL), which uses very small quantity of cutting fluids and still offers the same functionality as flood cooling, can be considered as an alternative solution. This thesis presents an experimental study of face milling of automotive aluminum alloy A380 under four different lubrication/cooling conditions: dry cutting, flood cooling, MQL (Oil), and MQL (Water). Experiments were design using …

Polyaniline Nanotubes: Catalysis And Their Conversion To Carbon Nanotubes, Stephen Paquette

Theses

Polyaniline nanotubes, first synthesized by Parasarathy and Martin in 1994, have been studied extensively in recent years.[1] The study of these nanodimensional particles has been oriented mostly toward an attempt to understand the electrical and magnetic properties surrounding these semi-one dimensional objects and also toward applications for their utilization.[2] The ability to produce these nano-particles chemically but, without a template was first discovered by Wan in 1999.[3] The use of chemical oxidants often produces undesirable byproducts during the reaction. Therefore, we have used this as a launching point in order to first mirror this template-less synthesis in our lab and …

Automated Extraction Of Disease-Gene Relationships From Medline, Jennifer R. Paine

Theses

The increasing amount of scientific information available to researchers in the form of biomedical literature is beginning to bring about a need for the development of tools to extract information automatically from these sources. One segment of information of particular interest to researchers is the linkage information between genes and diseases. These linkages can help researchers interpret large-scale genomics studies as well as make logical connections between gene expression levels and certain phenotypes. To make the finding and collecting of this information practical, automated methods of information extraction are required. In this paper, I propose a method for the automated …

Phylogenetic Analysis Of Kentucky Strains Of Xylella Fastidiosa, J. Nicole Mundell

University of Kentucky Master's Theses

Phytopathogenic bacterium, Xylella fastidiosa, causes a number of economically important diseases, including Pierces disease (PD) of grape and bacterial leaf scorch (BLS) of a number of landscape trees. In Kentucky (KY), BLS affects a number of shade trees including many oak and maple species. In 2001, PD was diagnosed in grapevines in western KY. Xylella fastidiosa is also detected in many asymptomatic landscape plants and grasses. It was the goal of this research to identify hosts of X. fastidiosa around KY and use phylogenetic analysis to compare sequences of the 16S rDNA and gyrase B (gyrB) genes between samples. This …

Using Sequential Imagery To Evaluate Aspects Of Seed Vigor And Germination, Manjul Dutt

University of Kentucky Master's Theses

A sequential imaging system using a flat bed scanner interfaced to a personal computer was developed to study seed germination and vigor. The utility of the system was demonstrated in studies relating aspects of seed vigor in impatiens seed lots and for dormancy release in two woody perennials. Impatiens seed lots were kept in storage for 6 months to obtain a range in vigor levels. The ability to see differences at the individual seed level was possible because of the development of the sequential imaging system. It was observed that seeds deteriorated both under optimum 4OC as well as 25OC …

Neurodevelopmental Models Of The Heterogeneous Syndrome Of Schizophrenia, Gwen Decelles

Theses

Not included.

Belief In A Just World, School Stress And Academic Success, Elizabeth A. Hepworth

Theses

Belief in a just world, a construct first introduced by Lerner (1978), has been the topic of psychological research for the past forty years (Lerner, 1965; Rubin & Peplau, 1973; Tomaka & Blascovich, 1994; Dalbert, 1999; Hafer, 2000; Furnham, 2003). Much of the research conducted on the belief in a just world focused on its cognitive use as a protective mechanism. For example, Belief in a Just World (BJW) has been positively correlated with helping behavior (Beirhoff, 2002), commitment to long range goals (Hafer, 2000), positive well-being (Dalbert, 2000), and negatively associated with stress (Takoma & Blascovich, 1994). In the …

Meniscus Studies In Water Immersion Optical Lithography At 193 Nm, Kiran J. Sonawane

Theses

A new approach for optical patterning that interposes a liquid between an exposure tool's projection lens and a wafer to achieve better depth of focus and resolution over conventional projection lithography is known as "Immersion Lithography". As industry focus is getting shifted towards the liquid immersion lithography to manufacture the commercial immersion tools, study of fluid flow and distribution is getting very crucial. The focus of this experimental work was to capture fluid flow and distribution and meniscus behavior on both bare and photoresist-coated glass wafers as well as silicon wafers and address one of the major challenges of immersion; …

Gas Plume Species Identification In Lwir Hyperspectral Imagery By Regression Analyses, David Pogorzala

Theses

The goal of this research was to develop an algorithm for identifying the constituent gases in stack releases. At the heart of the algorithm is a stepwise linear regression technique that only includes a basis vector in the model if it contributes significantly to the fit. This significance is calculated by an F-statistic. Issues such as atmospheric compensation, gas absorption and emission, background modeling, and fitting a linear regression to a non-linear radiance model were addressed in order to generate the matrix of basis vectors. Synthetic imagery generated by the DIRISG model were used as test cases. Results show that …

Torque Retention With Polypropylene Bottles, David Garrett Moszak

Theses

Two different case studies were examined to determine how different liner structures or plastic additives affect torque degradation. The first case study examined how torque is affected with and without the use of a zinc stearate plastic additive. The second case study examined how torque retention differs between a synthetic liner and a pulp board backed liner structure. Both torque studies provided a starting point for the application torque range for use in production. The torque studies were used to outline the necessary application torque so that the child resistant closures obtain and maintain the proper torque level over time …

Al2o3 Hosted Attenuated Phase Shift Mask Materials For 157 Nm, Yang Liu

Theses

The Semiconductor Industry Association Roadmap 2003 has put 157 nm optical lithography as the next generation lithography wavelength for the node of 70 nm integrated circuits and below. The small departure from 193 nm puts more challenge on imaging tools and processes. One of the crucial areas is the exploration of thin film optical materials for mask coatings at vacuum ultraviolet (VUV) wavelength. Attenuated Phase Shift Mask (APSM) is one of the optical enhancement technologies pushing critical dimension of lithography to diffraction limits. As no existing single material satisfies those demanding requirements of APSM, non-stoichiometric composite materials will be explored …

Transformable Shoes, Wannida Nivartvong

Theses

Not Included

Application Of Phenology To Assist In Hyperspectral Species Classification Of A Northern Hardwood Forest, Gretchen Sprehe

Theses

Tree species have unique spectral reflectance patterns that allows them to be both compared to other objects and to other types of trees. Increasing the spectral separation of such images may assist with surveying and forestry inventories. In past studies, most classifications were done with summer leaves, which darken and become very similar shades of green. This study utilized the phenology of trees to investigate how the changing colors of young or senescing leaves may assist in species classification based on aerial images. Images were taken of the Hubbard Brook Experimental Forest, which is mainly dominated by sugar maple (Acer …

To Catch The Sun, Virginia M. Orzel

Theses

Not Included

Formulation And Implementation Of Environmental Strategies In Printing Firms: A Comparison Between The U.S. And Germany, Diana B. Mross

Theses

This thesis will guide the reader through the investigation process of a research area previously ignored in the research literature: the formulation and implementation of environmental strategies in printing companies. It will address strategies in printing firms, primarily from a cultural and structural point of view, which are formulated and implemented to help protect the environment and to save resources. The investigation will include a review of previous literature regarding strategy, environmental management and technology, and health and safety management. It will introduce the research questions, the methodology, and the analysis of research findings.

Through the exploratory case study method, …

Modeling Multiple Scattering And Absorption For A Differential Absorption Lidar System, Daniel D. Blevins

Theses

The Digital Image and Remote Sensing Image Generation (DIRSIG) model has been developed and utilized to support research at the Rochester Institute of Technology (RIT) for over a decade. The model is an established, first-principles-based scene simulation tool that has been focused on passive multi- and hyper-spectral sensing from the visible to long wave infrared (0.4 to 14 pm). Leveraging photon mapping techniques utilized by the computer graphics community, a first-principles-based elastic Light Detection and Ranging (LIDAR) model was incorporated into the passive radiometry framework so that the model calculates arbitrary, time-gated photon counts at the sensor for atmospheric, topographic, …

Pltw/Cims Workcell Design, Brett Handley

Theses

Not included.

Symphony Of Nostalgia, Amena Saeed

Theses

Not included.

Comparison Of Hyperspectral Imagery Target Detection Algorithm Chains, David C. Grimm

Theses

Detection of a known target in an image has several different approaches. The complexity and number of steps involved in the target detection process makes a comparison of the different possible algorithm chains desirable. Of the different steps involved, some have a more significant impact than others on the final result the ability to find a target in an image. These more important steps often include atmospheric compensation, noise and dimensionality reduction, background characterization, and detection (matched filtering for this research). A brief overview of the algorithms to be compared for each step will be presented.

This research seeks to …

Web Service Infrastructure For Supply Chain, Pradip R. Chandratre

Theses

Managing a supply chain is one of the most complicated tasks today when erratic changes in demand must be met as soon as possible for staying competitive, while dealing with multitude of business partners that are involved in the chain. It is imperative that any changes in a corporation's product/service demand be immediately communicated with its suppliers and logistic service providers. This task of communication has long been overtaken by computerized systems from the telephones and fax machines. The computer technologies being used so far to connect two businesses are proving to be too rigid in today's world of mergers, …

Deployment Experiments For Ballooning On Mars (Debom), Aimee Nicolette Lemieux

Theses

One mode of planetary research involves balloons. They are relatively low cost, cover more area than a rover, obtain better resolution than an orbiter, and can collect data about the atmosphere [2]. From the study of their atmospheres, scientists believe that six planets and one moon of Saturn (Titan) can support balloon flights. According to scientists, Mars atmosphere may present the fewest challenges, allowing for a quicker timeline in using balloons [2]. At NASA's Wallops Flight Facility (WFF), experimental research has been conducted on one meter model Montgolfiere, Paraballoons, and Para-Montgolfiere balloons. The balloons were constructed of thin (0.6 mil), …

Effect Of Added C4-Alcohols On The Structure Of Microemulsion Droplets Measured By Small-Angle Neutron Scattering., Elvis A. Zambrano

Theses

The role of C₄-alcohols (n-butanol, 2-butanol and tert-butanol) in four component microemulsions is studied using neutron scattering. These microemulsions are dispersions of nanoscale droplets consisting of a core of water surrounded by a surfactant-stabilized shell. The particles are suspended in an oil (octane) continuum. The addition of a co-surfactant, such as a short-chain alcohol, modifies the droplet size and structure, as well as the rigidity of the surrounding shell. In this work, we investigate water-in-oil microemulsions employing small-angle neutron scattering (SANS) experiments performed at the NIST Center for Neutron Research. Using this technique, it is possible to probe …

Implementation Of Urban Corridors Will Ease Environmental Impacts Between Residential And Industrial Zones, Tameria M. Warren

Theses

The objective of this work was to investigate the environmental conditions or patterns that impact cities and urban landscapes and to identify the reasonable buffers or corridors that can ease these impacts, primarily between industrial and residential areas. The hypothesis is that urban cities do face environmental impacts from various sources, a primary source being industrial practices, and that the implementation of corridors or buffers will minimize these impacts and possibly improve the environmental and socioeconomic conditions of the surrounding residential areas and the cities as a whole. The research included defining the structure of urban areas, investigating environmental impacts …

An Online Guide For Traveling In Southern Spain Using Gui Design And Actionscripting, Yun-Ju Peng

Theses

My project is a personal travel experience website as well as a traveling aid for those who are interested in southern Spain, including Cordoba, Seville and Granada. To differentiate it from the traditional media, I've created an online travel book with many movies, flamenco guitar music, attractive Spain photos and other interesting features for users to enjoy. With user-friendly interface and appealing parts, my thesis enables users to experience how and what southern Spain looks like. The users can not only flip the pages, jump to a specific page directly by clicking the part they want, they can also play …

The Mother Immaculate, Calvert J. Waller Iii

Theses

Not included.

Experimental And Theoretical Study Of A Uv Disinfection System For Water Treatment, Wei Yang

Theses

An innovative energy saving ultraviolet disinfection reactor has been developed and tested. The technical approach taken is to establish a relationship between the power consumption and the design features of a UV disinfection system, and then determine these design features by minimizing the power consumption function.

The circular-array type (CAT) UV reactor design consists of four short straight UV bulbs located circumferentially outside a quartz tube. A 4 inches diameter prototype was tested with a water flow rate of 1 1 GPM. Experimental results showed that the CAT UV reactor requires 30% less power consumption (9.6W) compared with a commercial …

What Prospective College Students Say Matters During The College Selection Process, Kari L. Steger

Theses

For most prospective college students, selecting a college is a highly involved, lengthy process. While past research has examined how high school students determine their college choice subsets and what information sources they use most during the college selection process, further research is needed to determine the most effective means of reaching prospective students. The current study employs focus group research to examine students' college selection processes to gain a better understanding of the types of information students seek during their college selection process, the media they use to find it, and the people whose guidance they seek when making …

Aquagp: Approximate Query Answering Using Genetic Programming, Jason Brandon Peltzer

Theses

Speed, cost, and accuracy are crucial performance parameters while evaluating the quality of a query using any Database Management System (DBMS). For some queries it may be possible to approximate the answer using an approximate query answering algorithm or tool. Also, for certain queries, it may not be critical to determine the perfect/exact results so long as the following conditions are true: (a) a high percentage of the relevant data is retrieved correctly, (b) irrelevant or extra data is minimized, and (c) an approximate answer (if available) results in a significant savings in terms of the overall query cost and …

Us Army Military Base Closures In Germany - Evaluation Of Eh&S Activities, Sandra L. Torres

Theses

This research assessed the effectiveness of existing Environmental, Health and Safety (EH&S) Management programs for two army installations located in Germany that were scheduled for closure. These two base closures were separated by a period of four years. This research qualitatively assessed the control measures in place, the effectiveness of these measures, and the final status of EH&S issues upon completion of the base closure process.

EH&S programs were evaluated using interviews of employees involved in the base closure in order to determine what processes were in place to minimize environmental impacts, what actions were taken to ensure the health …