Digital Commons Network^™

Smart Grid Communications, Christopher W. Asbery

Theses and Dissertations--Electrical and Computer Engineering

Smart grid technologies are starting to be the future of electric power systems. These systems are giving the utilities detailed information about their systems in real time. One of the most challenging things of implementing smart grid applications is employing the communications into the systems. Understanding the available communications can help ease the transition to these smart grid applications. Many of the utility personnel are spending too much time trying to figure out which communication is better for their application or applications. So this thesis presents the different communication types available with discussing the different attributes in which these communication …

Formulation And Solution Of Electromagnetic Integral Equations Using Constraint-Based Helmholtz Decompositions, Jin Cheng

Theses and Dissertations--Electrical and Computer Engineering

This dissertation develops surface integral equations using constraint-based Helmholtz decompositions for electromagnetic modeling. This new approach is applied to the electric field integral equation (EFIE), and it incorporates a Helmholtz decomposition (HD) of the current. For this reason, the new formulation is referred to as the EFIE-hd. The HD of the current is accomplished herein via appropriate surface integral constraints, and leads to a stable linear system. This strategy provides accurate solutions for the electric and magnetic fields at both high and low frequencies, it allows for the use of a locally corrected Nyström (LCN) discretization method for the resulting …

Fuel Price, State Taxation, And Fleet Mileage Reduction, Kris Harmon

MPA/MPP/MPFM Capstone Projects

This paper utilizes several models to gauge the annual impact of state gasoline taxes and pump prices on the vehicle miles traveled in the United States. Regression models in first differences were used to analyze annual changes in the variables. The models indicate that annual increases in pump prices correspond to significant decreases in mileage, while state fuel taxes do not significantly impact mileage. With local, state, and federal taxation only composing 12 percent of the pump price of fuel, the impact of changes to these taxes are diminished. This suggests that if policymakers choose to adopt a policy of …

Nutrition Policy, Nonmarket Failure, And The Obesity Epidemic, James Woodward

MPA/MPP/MPFM Capstone Projects

The Dietary Guidelines for Americans, which are based on the Dietary Goals for the United States, represent the federal government’s first attempt to improve the nation’s health by recommending that Americans avoid certain foods. The Guidelines were based on what was perceived, by the government and nutritionists alike, to be solid scientific evidence that consumption of fat and saturated fat in particular, increase the risk of developing heart disease. They also emphasized, and continue to emphasize, the importance of exercise and calorie restriction as the primary means of maintaining a healthy weight. In short, the Guidelines sought to …

Student And Instructor Perceptions Of Factors Important For Student Success In Online And In-Person Algebra Classes At Somerset Community College, Richard S. Matika

Theses and Dissertations--Educational Policy Studies and Evaluation

Online mathematics courses at Somerset Community College (SCC) have traditionally had a lower retention rate than their in-person counterparts. This study looked at online and in-person students at SCC in the courses Intermediate Algebra and College Algebra. Beginning of semester student demographics were considered to determine whether or not the online and in-person student populations were comparable. End of semester student demographics, retention rates, and grades on the final exams were examined to determine whether or not there were patterns among completer students. Finally, a survey was administered to students and instructors to determine their perceptions of several factors …

You Can’T Post That . . . Or Can You? Legal Issues Related To College And University Students’ Online Speech, Neal H. Hutchens

Educational Policy Studies and Evaluation Faculty Publications

Online activities increasingly represent a common part of the student experience. Along with seeking to engage students in positive ways in relation to their online activities, colleges and universities must also deal with instances of when students’ online expression potentially violates campus conduct standards. This article provides a review of legal standards relevant to students’ online speech, including an examination of cases arising in an online context.

A Descriptive, Survey Research Study Of The Student Characteristics Influencing The Four Theoretical Sources Of Mathematical Self-Efficacy Of College Freshmen, Tonja Motley Locklear

Theses and Dissertations--Science, Technology, Engineering, and Mathematics (STEM) Education

The Sources of Middle School Mathematics Self-Efficacy Scale (Usher & Pajares, 2009) was adapted for use in this study investigating the impact that gender, race, sexual orientation, hometown location (rural, suburban, or urban), high school GPA, college GPA and letter grade of a mathematics course in the previous semester had on the four sources of mathematical self-efficacy of 102 college freshmen attending three small, private, liberal arts institutions. Even though this study found no interaction effects between the student characteristics, the four sources of mathematical self-efficacy, or the three subcategories of the vicarious experience construct, this study did find statistically …

Internationalization Of An African University In The Post-Colonial Era: A Case Study Of The University Of Nairobi, Iddah A. Otieno

Theses and Dissertations--Educational Policy Studies and Evaluation

This case study uses post-colonial and dependency theoretical lenses to investigate the forces influencing policy, procedures, and participation in international activity in the post-colonial African university environment of Kenya’s first national public university—the University of Nairobi (UoN). The research addresses (1) the approaches and strategies adopted by UoN to engage in international activity; (2) the changes that have taken place over time in international activity engagement at UoN since the attainment of political independence by the Republic of Kenya; and (3) the rationales driving participation in international activity. This investigation included library research, document analysis, multiple campus visits, and 20 …

The Influence Of Corporate Leadership And Management Practices On A Public School District, Randall Paul Napier Jr.

Theses and Dissertations--Educational Leadership Studies

The purpose of this case study is to understand how management and leadership ideas that were present in Toyota Motor Manufacturing Kentucky influenced management and leadership practices adopted by Scott County Public Schools during 2002-2011. Data for the study were collected during the summer of 2011, using individual and focus group interviews including teachers, administrators, community and Toyota Motor Manufacturing Kentucky employees; on-site participant observations, and documents.

This study examined Scott County Public Schools implementation of the Quest for Useful Employment Skills for Tomorrow, the formation of The Center for Quality People and Organizations, changes in Science Technology Engineering Math …

An Exploration Of The Use Of Data, Analysis And Research Among College Admission Professionals In The Context Of Data-Driven Decision Making, Kimberly Ann Chaffer Schroeder

Theses and Dissertations--Educational Policy Studies and Evaluation

Increasing demands for accountability from both the public and the government have resulted in increasing pressure for higher education professionals to use data to support their choices. There is significant speculation that professionals at all levels of education lack the knowledge to implement data-driven decision making. However, empirical studies regarding whether or not professionals at four-year postsecondary institutions are utilizing data to guide programmatic and policy decisions are lacking. The purpose of this exploratory study was to explore the knowledge and habits of undergraduate admission professionals at four-year colleges and universities regarding their use of data in decision making. A …

Professional Identity Development In Online Christian Theological Education: A Case Study Of Preparing Pastoral Practice Through Discursive Activity, Rovina L. Hatcher

Theses and Dissertations--Curriculum and Instruction

The purpose of this dissertation study was to explore the professional preparation of students in online classes at a Christian theological seminary. Concerns of theological education involve the capacity or incapacity of community development and somatic or embodied learning in online education. Using a theoretical framework drawn from communities of practice (Wenger, 1998), professional clergical preparation (Foster, Dahill, Golemon, & Tolentino, 2005), and Gee’s (2000-2001) dimensions of identity development, the researcher focused the analyses on students’ written texts located in the discussion board fora of the online courses. These records were examined for indications of formation of the professional identity …

Opera And The Modern Culture Of Film: The Genesis Of Cinemopera, Its Intertextuality And Expansion Of Operatic Source Material, Yuell "Chuck" E. Chandler Iv

Theses and Dissertations--Music

The boundaries of opera, as in all art forms, are constantly being re-evaluated. This analysis examines one of the most recent developments in opera-the use of film as source material, and connections to the film world- through analyzing three operas: Austrian composer, Olga Neuwirth’s opera, Lost Highway, Chinese-American composer, Tan Dun’s opera, The First Emperor, and acclaimed American film composer, Rachel Portman’s opera, The Little Prince. Each of these works exemplifies the modern relationship of opera and film in different ways. To classify these newly film-influenced works, the term cinemopera is used in describing operas connected to …

Recreational Music-Making In Music Pedagogy: A Manifesto For Change, Brandon Keith Wood

Theses and Dissertations--Music

The arts are an essential part of any student’s well rounded education. The future of music in education will depend on its ability to deliver relevant, effective, and measurable outcomes. However, the expectations and performance nature of traditional curricula often foster a sense of musical elitism and ostracizes students that are solely interested in music as a recreational outlet. Incorporating recreational music-making into education can provide opportunities for students to experience self-expression, creativity, social connection, and enjoyment. These values will not only enhance their education, but also lead to acquired skills for use in all areas of their lives. Activities …

School, Family, And Faith: Social Influences On Educational Outcomes Of Nonmetropolitan Sexual Minority Students, Christopher J. Stapel

Theses and Dissertations--Sociology

Social institutions in rural communities tend to be highly interrelated and social ties tend to be dense and multiplex. Human ecological theoretical models posit that all institutions in which an individual is embedded interact in complex ways. As such, this dissertation examines the influences of school, faith, family, and risk contexts on the grade point averages of students who attended school in nonmetropolitan counties in Appalachian Kentucky. Using data disaggregated by gender from nearly 5,000 adolescents, I identified risk and protective factors on grade point averages by attraction type (exclusively opposite-sex attracted, same-sex attracted, and unsure of attraction), identified differences …

Graduate Employees’ Work And Organizing In Today’S University: A New Social Movement Theory Approach To Internal And External Struggles, Michael Carl Ide

Theses and Dissertations--Sociology

This is a mixed-methods comparative study of union and non-union graduate employees’ work experiences, following Wicken’s (2008) call for additional research into the graduate union movement. I used focus group interviews, finding that nonunionized participants had significantly more negative views of their work and faculty members than unionized participants. Non-unionized participants were also more likely to display greater internalization of neoliberal views and neoliberal subjectivity, and were more likely to see their problems in fatalistic terms. I found increased activity with the union to be associated with both decreased fear and anxiety as well as an increased sense of personal …

Proteasome Regulation Of Caspase-8: Significance In Cancer, Michael Vincent Fiandalo

Theses and Dissertations--Molecular and Cellular Biochemistry

Anti-tumor therapeutic strategies based on combinations of chemotherapeutic agents with a death inducing ligand such as TNF-α Related Apoptosis Inducing Ligand (TRAIL), are directed towards selective and effective cancer cell apoptosis and enhanced therapeutic response. We previously demonstrated that proteasome inhibition sensitizes TRAIL resistant prostate cancer cells to TRAIL-mediated apoptosis via stabilization of the active p18 subunit of initiator caspase-8. The present study investigated the functional link between caspase-8 and the proteasome, by analyzing the impact of caspase-8 ubiquitination and proteasomal degradation on the outcomes of the extrinsic apoptosis pathway in cancer cells. Caspase-8 ubiquitination status was assessed by polyubiquitin …

Structural Basis Of Substrate Recognition In Thimet Oligopeptidase And Development Of Nanoparticles For Therapeutic Enzyme Delivery, Jonathan Mark Wagner

Theses and Dissertations--Molecular and Cellular Biochemistry

Neuropeptidases are responsible for degradation of signaling peptides in the central nervous system and periphery. Some neuropeptidases have also been shown to play a role as part of the cell’s hydrolytic machinery responsible for breaking down proteins and peptides into amino acids, and these enzymes therefore influence small peptide availability for antigen presentation. A better understanding of how neuropeptidases recognize their substrates could lead to therapeutics that modulate the activity of these important enzymes. Alternatively, re-engineering these enzymes to selectively hydrolyze undesirable peptides could make them attractive as therapeutics themselves. A key question in understanding the activity of these enzymes …

Metallic Patterning Using An Atomic Force Microscope Tip And Laser-Induced Liquid Deposition, Carlos Andrés Jarro Sanabria

Theses and Dissertations--Electrical and Computer Engineering

The development of nanoscale patterns has a vast variety of applications going from biology to solid state devices. In this research we present a new direct patterning technique in which laser photoreduction of silver from a liquid is controlled by a scanning atomic force microscope tip. While pursuing the formation of patterns using the plasmonic field enhancement of an electromagnetic wave incident on a metallic Atomic Force Microscope (AFM) tip, our group discovered that contrary to expectations, the tip suppresses, rather than enhances, deposition on the underlying substrate, and this suppression persists in the absence of the tip. Experiments presented …

Tobacco Treatment In College Health, Joanne Brown

DNP Projects

ABSTRACT: Tobacco Treatment in College Health

The college years are a critical time in the development of smoking behavior and tobacco use. Smoking is linked to 30% of cancer deaths, 80% of deaths from chronic obstructive pulmonary disease and early cardiovascular disease and death. Effective treatment interventions at this time provide an opportunity to drastically reduce premature morbidity and mortality.

This document follows the progression from the discussion of the problem to evaluation of an intervention. The first manuscript is a review of existing literature on Internet interventions with young adults, including methodology, theoretical frameworks and outcome measures for tobacco …

Evaluation Of Vascular Changes In Cattle Relative To Time-Off Endophyte-Infected Tall Fescue, Jessica R. Bussard

Theses and Dissertations--Plant and Soil Sciences

Twenty-four steers were grazed on endophyte (Neotyphodium coenophialum)-infected [[Lolium arundinaceum (Schreb.) Darbysh]; E+] tall fescue (TF) and exposed to ergot alkaloids for an 106-d grazing period. Cattle were removed from pasture, placed in dry lots, and fed a non-toxic diet to evaluate changes in vascular contraction relative to time-off E+ TF pasture. Lateral saphenous veins (SV) were biopsied from steers at 0-, 21-, 42-, and 63-d off TF pasture and from 6 control steers at 0- and 63-d off bermudagrass (BG) pasture. To evaluate contractile response, biopsied SV were exposed to increasing concentrations of ergotamine in a multimyograph. Cross-sectional scans …

Method Development For Detecting And Characterizing Manufactured Silver Nanoparticles In Soil Pore Water Using Asymmetrical Flow Field-Flow Fractionation, Annie R. Whitley

Theses and Dissertations--Plant and Soil Sciences

Recent advances in nanotechnology have led to the production of materials with nanoscale dimensions (nm) and properties distinctly different from their bulk (>100 nm) counterparts. With increased use, it is inevitable that nanomaterials will accumulate in the environment and there is concern that the novel properties of nanomaterials could result in detrimental environmental and human health effects. In particular, there has been concern recently regarding the use of silver (Ag) based nanomaterials as antimicrobial agents in consumer and medical products. Current regulations dealing with the discharge of metals into the environment are based on total concentrations with no consideration …

Investigations Of Oxidative Stress Effects And Their Mechanisms In Rat Brain After Systemic Administration Of Ceria Engineered Nanomaterials, Sarita S. Hardas

Theses and Dissertations--Chemistry

Advancing applications of engineered nanomaterials (ENM) in various fields create the opportunity for intended (e.g. drug and gene delivery) or unintended (e.g. occupational and environmental) exposure to ENM. However, the knowledge of ENM-toxicity is lagging behind their application development. Understanding the ENM hazard can help us to avoid potential human health problems associated with ENM applications as well as to increase their public acceptance. Ceria (cerium [Ce] oxide) ENM have many current and potential commercial applications. Beyond the traditional use of ceria as an abrasive, the scope of ceria ENM applications now extends into fuel cell manufacturing, diesel fuel additives …

Removal Of Arsenic(Iii) From Water With A New Solid-Supported Thiol, Partha Jana

Theses and Dissertations--Chemistry

Arsenic is a highly toxic, easily transportable and widespread contaminant in groundwater throughout the world. Arsenic causes acute toxicity by disrupting biological functions. In groundwater arsenic concentrations can reach up to a few milligrams per liter. Current regulations on arsenic content in drinking water are becoming more stringent and require the standard to be reduced to a few parts per billion. Arsenic exists as oxyanions in aqueous solution in either trivalent or pentavalent oxidation states depending on the oxidation-reduction potential and pH of the medium. Several treatment methods are available for removing arsenic from water. However, cost, operational complexity of …

Biosensing Systems For The Detection Of Bacterial Quorum Sensing Molecules: A Tool For Investigating Bacteria-Related Disorders And Food Spoilage Prevention, Nilesh G. Raut

Theses and Dissertations--Chemistry

Quorum sensing enables bacteria to communicate with bacteria of the same or different species, and to modulate their behavior in a cell-density dependent manner. Communication occurs by means of small quorum sensing signaling molecules (QSMs) whose concentration is proportional to the population size. When a QSM threshold concentration is reached, certain genes are expressed, thus allowing control of several processes, such as, virulence factor production, antibiotic production, and biofilm formation. Not only many pathogenic bacteria are known to produce QSMs, but also QSMs have been identified in some bacteria-related disorders. Therefore, quantitative detection of QSMs present in clinical samples may …

Nanoparticle Additives For Multiphase Systems: Synthesis, Formulation And Characterization, Vinod Kanniah

Theses and Dissertations--Chemical and Materials Engineering

Study on nanoparticle additives in multiphase systems (liquid, polymer) are of immense interest in developing new product applications. Critical challenges for nanoparticle additives include their synthesis, formulation and characterization. These challenges are addressed in three application areas: nanofluids for engine lubrication, ultrathin nanocomposites for optical devices, and nanoparticle size distribution characterization.

Nanoparticle additives in oligomer mixtures can be used to develop extended temperature range motor oils. A model system includes poly(α-olefin) based oligomers with a modest fraction of poly(dimethylsiloxane) oligomers along with graphite as nanoparticle additive. Partition coefficients of each oligomer are determined since the oligomer mixture phase separated at …

Fabrication Of An Epithelial Cell-Based Ion-Selective Electrode And Its Application For Use As Alternative Tumor Angiogenesis Assay, Christina Nicole Simmons

Theses and Dissertations--Chemical and Materials Engineering

Previous studies have provided evidence that endothelial cell-based potassium ion selective electrodes possess the ability to quantify substances that have permeability-altering effects on those endothelial cells. The capability of these so-called biosensors to detect elevated concentrations of certain chemical agents found following tumor formation make them useful in the application as an alternative tumor angiogenesis assay. In this study an epithelial cell line, human colon adenocarcinoma epithelial cells (Caco-2), was used to fabricate membranes that were used to test concentrations of these chemical agents, known as cytokines, mimicking the concentrations that have been observed in the serum of healthy individuals …

Application Of Thin Film Analysis Techniques And Controlled Reaction Environments To Model And Enhance Biomass Utilization By Cellulolytic Bacteria, Hsin-Fen Li

Theses and Dissertations--Chemical and Materials Engineering

Cellulose from energy crops or agriculture residues can be utilized as a sustainable energy resource to produce biofuels such as ethanol. The process of converting cellulose into solvents and biofuels requires the saccharification of cellulose into soluble, fermentable sugars. However, challenges to cellulosic biofuel production include increasing the activity of cellulose-degrading enzymes (cellulases) and increasing solvent (ethanol) yield while minimizing the co-production of organic acids. This work applies novel surface analysis techniques and fermentation reactor perturbations to quantify, manipulate, and model enzymatic and metabolic processes critical to the efficient production of cellulosic biofuels.

Surface analysis techniques utilizing cellulose thin film …

Finite Element Analysis Of The Contact Deformation Of Piezoelectric Materials, Ming Liu

Theses and Dissertations--Chemical and Materials Engineering

Piezoelectric materials in the forms of both bulk and thin-film have been widely used as actuators and sensors due to their electromechanical coupling. The characterization of piezoelectric materials plays an important role in determining device performance and reliability. Instrumented indentation is a promising method for probing mechanical as well as electrical properties of piezoelectric materials.

The use of instrumented indentation to characterize the properties of piezoelectric materials requires analytical relations. Finite element methods are used to analyze the indentation of piezoelectric materials under different mechanical and electrical boundary conditions.

For indentation of a piezoelectric half space, a three-dimensional finite element …

Investigation Of The Critical Residues At The C-Terminus Of The E.Coli Periplasmic Chaperone, Sura, Brent Ferrell

Theses and Dissertations--Chemistry

SurA is a molecular chaperone in the periplasm of E.coli and has been implicated in the maturation of outer membrane proteins (OMPs). SurA consists of four domains, but only two of them, namely the N and C-­terminal domains, are necessary for chaperone function. Very little is known about which residues drive the interaction between the N and C-­termini that facilitates normal activity. We mutated several conserved residues on the C-terminus and generated additive truncations to observe the effects of each on the fitness of the cell. We found one mutation E(408):A was sufficient to reduce SurA activity by 3-­fold, but …

When Concerted Conduct Leads To Misuse: An Examination Of The Federal Circuit's En Banc Holding In Princo, Jerrad T. Howard

Kentucky Law Journal

No abstract provided.