Digital Commons Network^™

Evaluation Of Tagging Techniques Gamma-Decay Probabilities Using The Surrogate Method, Timothy Lee Reed

Masters Theses

A detailed analysis of the statistical and discrete [gamma]-decay tagging techniques was conducted using the absolute surrogate and surrogate ratio method (SRM) to obtain the 92Mo(n,[gamma]) cross section in an equivalent neutron energy range of 80 to 880 keV. Excited 93Mo and 95Mo nuclei were populated using (d,p) reactions on 92Mo and 94Mo targets, respectively. The absolute surrogate 92Mo(n,[gamma]) cross sections disagreed with evaluated neutron capture cross section data by as much as a factor of 4 using the statistical tagging approach, whereas the discrete [gamma]-decay tag absolute surrogate cross section disagreed with the evaluated neutron capture cross section by …

Geographic Variation In The Lower Temperature Tolerance In The Invasive Brown Anole, Anolis Sagrei And The Native Green Anole, Anolis Carolinensis (Sauria: Polychrotidae), Laura Carolina Maria Rubio

Masters Theses

Invasive species are considered to be the second greatest threat to native biodiversity and several factors have been identified as contributing to the success of introduced species, including their initial genetic variation and the ability of populations to adapt to a new environment. Temperature has a significant impact on reptilian ecology and distribution since they ordinarily rely on external heat sources for the maintenance of body temperatures suitable for normal activity. Body temperature affects performance in these organisms given its importance for all aspects of behavior, locomotion, courtship and rates of feeding and growth. Critical thermal tolerances can, therefore, give …

"Lost Shadows", Julle Oksanen

Masters Theses

There are thousands of pages of technical argumentation on lighting. We could say that there is already a legacy of technical lighting. It is the result of the activity of technically oriented people. In the 1900, CIE was founded to research oil socks and their properties. Standardization got a huge boost in 1931 when CIE introduced international trichromatic colorimetry system, known as “CIE System”. Engineers became active in illumination engineering societies. Sadly, the more visual skills of the lighting designer started to ebb. The lighting design work shifted from the hands of visually oriented people to the hands of technically …

Consider The Source: Receiver-Assigned Attributions Of Credibility To Influential Bloggers, Aaron Michael Sachs

Masters Theses

The purpose of this study is to examine credibility as it pertains to blogging. While studies have traditionally considered credibility in the context of the material being created, this study examines source credibility in the context of the personality creating the material. Therefore, this study functions primarily as an exploratory study and seeks to present an understanding of source credibility from the perspective of the individuals participating in blogging communities cultivated by influential bloggers. An interview questionnaire was specially developed for this study. Ten participants were selected for this study. Eight of them are females, two of the participants are …

Acculturation And Identity Development Of Deaf Ethnic Minorities, Glennise Candice Schlinger

Masters Theses

This study examined whether experiences in the family and the education systems could influence Deaf ethnic identity development. Data were collected via administration of the Deaf Acculturation Scale (DAS). Participants’ responses were assessed as outlined by the developers of the DAS (Maxwell-McCaw & Zea, 2011). Results suggested that parents’ attitude towards their child’s deafness may affect the deaf individual’s identity development. Semi-structured interviews were also conducted with four deaf ethnic minority participants: One Venezuelan American and three African American. Two hearing parents (both mothers) also participated in the interview: one Venezuelan American and one African American. Thematic analysis was used …

Implicitly And Explicitly Assessed Relationship Satisfaction, Matthew Jason Shaffer

Masters Theses

This study investigates the relationship between implicitly assessed (i.e., unexpressed, sometimes unconscious, “gut-level”) attitudes and explicitly assessed attitudes in romantic couples. 135 newlywed couples were examined in a laboratory session. A series of Hierarchical Linear Models were run to assess whether implicitly assessed attitudes predict the use of demand-withdraw behaviors in conflict discussion tasks. Results indicate that, for demand behaviors, there is a 3-way interaction between implicitly assessed attitudes, participant sex, and partner behavior during the discussion task. Implicitly assessed attitudes did not predict withdraw behaviors. Theoretical implications for both implicitly assessed attitudes research and romantic relationships research are discussed.

On Decision Making: Bayesian And Stochastic Optimization Approaches, Yang Shen

Masters Theses

Decision analysis provides a framework for searching an optimal solution under uncertainties and potential risks. This thesis focuses on two problems arising in transportation engineering and computer sciences, respectively.

First, it is considered a centralized controller which imposes actions on a number of interacting subsystems. Employing an appropriate Markov Decision Process framework, we establish that the Pareto optimal solution of each subsystem will be optimal for the entire system. Synthetic data have been taken into account for verifying this claim.

Next, we focus on a supercomputing problem utilizing a hierarchical Bayesian model. We estimate an optimal solution in order to …

The Accidental College Student, Phyliss Dubinsky Shey

Masters Theses

This narrative study began as a retrospective of an in-depth interview study with a young woman who navigated the move from a large, suburban school system in the mid-Atlantic region before the fifth grade to a small, isolated rural school in Southern Appalachia in the 1990s. She graduated from the only high school serving the county in which she lived. Over the course of two formal interviews, hundreds of informal conversations for more than ten years, and particularly through writing this analysis (Goodall, 2000), I realized that even though there were vast differences between our ages, cultural backgrounds, and current …

The Impacts Of Surface Mining Restoration Efforts On Soil Dwelling Nematode Communities In The Appalachian Region, Haley Shae Smith

Masters Theses

Traditional restoration of post mining sites in the southeastern U.S. utilizes methods that discourage above and below-ground succession of native floral and faunal communities. Recent advances in mining restoration techniques proposed by the Appalachian Regional Reforestation Initiative (ARRI) have improved above-ground plant succession and growth rates in reclaimed sites by developing the Forestry Reclamation Approach (FRA), a process that discourages substrate compaction and encourages native plant succession. The below-ground component of these reclaimed areas remains undescribed, however. Below-ground invertebrate communities in mining restoration sites have been largely ignored, despite their potential importance to the long-term recovery of these profoundly disturbed …

Rejection Sensitivity In Adolescent Offspring Of Mothers With Borderline Personality Disorder, Jennifer Marie Strimpfel

Masters Theses

Borderline Personality Disorder (BPD) is a chronic and severe psychological disorder with symptoms including fear of abandonment, negative relationships, and inappropriate expressions of anger. Individuals with BPD score higher on rejection sensitivity than do normative comparisons. The present study assessed rejection sensitivity in a sample at high risk for developing BPD—adolescent offspring of women with BPD. We hypothesized that adolescents whose mothers have BPD would have higher levels of rejection sensitivity than would normative comparisons, adolescents’ rejection sensitivity would be positively correlated with their mother’s borderline features, and adolescents’ rejection sensitivity would be positively correlated with their own borderline features. …

Characterizing The Concentration, Duration, And Frequency Of Turbid Events In Tennessee Streams: Potential For Macroinvertebrate Impairment, Robert Ryan Woockman

Masters Theses

The impairment of lotic systems due to siltation is one of the most common factors leading to a stream being placed on the 303d list. Once a stream reach is placed on the 303d list, a state’s environmental regulatory agency must then develop sediment total maximum daily loads (TMDLs). However, a deficiency exists in available methods for assessing biotic response to siltation, creating the inability to set TMDLs functionally related to cause of impairment. Water quality sondes can collect voluminous amounts of turbidity data and stage data at intervals that can be used to characterize concentration, duration, and frequency (CDF) …

Exploring Anaerobic Reductive Dechlorination At Low Ph Environments, Yi Yang

Masters Theses

Chlorinated aliphatic hydrocarbons (CAHs), such as tetrachloroethene (PCE) and trichloroethene (TCE), are ubiquitously pollutants in aquifer sediments and groundwater due to their heavy usage in industry and inappropriate disposal in the last century. Among about 1300 NPL (National Priorities List) sites, PCE and TCE are the two most frequently detected hazardous contaminants.

Engineered bioremediation, including biostimulation and bioaugmentation, is a promising technology to clean those PCE and/or TCE contaminated sites. However, in many contaminated groundwater systems and hazardous waste sites, pH can be lower than 5 to 6. And release of HCl (strong acid) from anaerobic reductive dechlorination may lower …

Motivated Endorsement Of Interethnic Ideologies: An Optimal Distinctiveness Approach, Kevin Lee Zabel

Masters Theses

The current study examined the effects of need for inclusion and differentiation (Brewer, 1991) activations on endorsement of colorblind and multicultural ideologies, and the roles ideological endorsements played in visual social perception. A total of 238 university students were given false feedback on a personality inventory to activate needs for differentiation and inclusion, as well as completed interethnic ideology measures and a morphed faces judgment task in which they perceived whether paired others were exactly the same or different. Bootstrapping analyses (Preacher & Hayes, 2008) confirmed that, consistent with hypotheses, need for inclusion activation participants endorsed colorblind ideology to a …

Power Management For Cloud-Scale Data Centers, Yanwei Zhang

Masters Theses

Recent years have seen the rapid growth of large and geographically distributed data centers deployed by Internet service operators to support various services such as cloud computing. Consequently, high electricity bills, as well as negative environmental implications (e.g., CO2 emission and global warming) come along. In this thesis, we first propose a novel electricity bill capping algorithm that not only minimizes the electricity cost, but also enforces a cost budget on the monthly bill for cloud-scale data centers that impact the power markets. Our solution first explicitly models the impacts of the power demands induced by cloud-scale data centers on …

Optimizing Maize Planting Date, Plant Population, And Fertilizer Application Rates For Lesotho Subsistence Farmers, Matthew Ryan Bruns

Masters Theses

Due to perpetually low yields, smallholder farmers throughout Southern Africa plow increasingly large plots of land in an attempt to increase their household food security. However, extensive agriculture further depresses yields because expensive inputs are spread over a larger area, provides little soil cover, and results in high soil erosion rates. To address these challenges, farmers in the Kingdom of Lesotho are beginning to adopt conservation agriculture (CA) systems. Under CA and conventional tillage systems the optimum plant population, planting date, and fertilizer rates are unknown. The effects of field preparation, planting date, weed control strategies, plant populations, and nitrogen …

Public Land In A Changing Climate: Planning For An Uncertain Future, Kathleen Marie Hauser

Masters Theses

This thesis investigates the ways in which institutions and actors consider climate change, and how the inclusion of diverse perspectives and challenges in the planning process shapes climate change governance. In particular, I asked how the participants, place-specific contexts, and decision-making processes affect environmental decision-making in Alaska’s National Parks. I discuss the literature on geographical perspectives on climate change, environmental and climate change governance, how uncertainty and risk affect decision-making in the context of climate change, and the history of land use management in the United States. This project incorporates qualitative methods to research the Climate Change Scenario Planning project …

Die Rolle Des Opfers In Der Fiktionalen Darstellung Der „Landshut“- Entfuehrung In Literatur & Film, Annica Esther Eisenhofer

Masters Theses

In this thesis I examine the cinematic and literary portrayal of victims during the hijacking of the Lufthansa plane, Landshut by Palestinian terrorists in October 1977. I discuss the book, Mogadischu Fensterplatz by the German author Friedrich Christian Delius and two films, the docudrama Todesspiel by the director Heinrich Breloer, and the film Mogadischu by the director Roland Suso Richter.

The study compares and contrasts alternate means of portraying the plight of the hijacking victims through different forms of media. Mogadischu Fensterplatz is a book whose text comprises a single victim’s personal narrative. The backbone of Todesspiel is a chronology …

"Sing To The Lord A New Song": Memory, Music, Epistemology, And The Emergence Of Gregorian Chant As Corporate Knowledge, Jordan Timothy Ray Baker

Masters Theses

Following the Christianization of the crumbling Roman Empire, a wide array of disparate Christian traditions arose. A confusion of liturgical rites and musical styles expressed the diversity of this nascent Christendom; however, it also exemplified a sometimes threatening disunity. Into this frame, the Carolingian Empire made a decisive choice. Charlemagne, with a desire to consolidate power, forged stronger bonds withRome by transporting the liturgy ofRome to the Frankish North. The outcome of this transmission was the birth of a composite form of music exhibiting the liturgical properties ofRome but also shaped by the musical sensibilities of the Franks—Gregorian chant.

This …

The Influence Of Dietary Variety And Course Sequence On Fruit Intake In Preschool-Aged Children, Chelsi Celcilia Cardoso

Masters Theses

Background: Fruit and vegetable (F&V) intake in preschool-aged children remains below recommendations. As the environment can affect food consumption, this study tested the effects of two environmental factors, dietary variety and course sequence, on fruit and overall intake of a snack in preschool-aged children. Methods: Using a 2 x 2 x 2 design (between-subjects factor of order and the within-subjects factors of dietary variety and courses), 16 children (4.1 + 0.7 years of age, 56.3% female, 75.0% White, 93.8% non-Hispanic or Latino, and 0.5 + 1.3 BMI z-score) from 2 preschool classrooms (classroom 1 [n = 7] and …

Application Of Highway Capacity Manual 2010 Level-Of-Service Methodologies For Planning Deficiency Analysis, James Oliver Ensley

Masters Theses

Influence on investment in the infrastructure is critical for decision-making by State planning departments. Judgments which are made for funding purposes and are based on limited data analysis by states can results in economic disasters for the state and nation. The Tennessee Department of Transportation (TDOT) uses the Evaluation of Roadway Efficiency (EVE) database to prioritize the importance of roadway projects in the state. In addition, EVE is also used as a method to provide deficiency analysis results for roadways in the state. This study will add support to the methodology of the current decision-making process in regards to Tennessee …

The Effects Of Leucine On Mitochondrial Biogenesis And Cell Cycle In A-375 Melanoma Cells, Tia Marie Filhiol

Masters Theses

Most cancer cells undergo the Warburg effect, a shift from oxidative to glycolytic metabolism accompanied by suppression of p53. We have demonstrated leucine stimulation of mitochondrial biogenesis, fatty acid oxidation, and p53 expression in both muscle and fat cells. Accordingly, we now sought to determine if leucine stimulates mitochondrial biogenesis and exit from cell cycle in A-375 melanoma cells. Because these cells use glucose as their primary substrate, cells were grown under both standard (11.1 mM) and reduced (5.5 mM) glucose conditions. Increasing glucose reduced mitochondrial mass 50-60%, and accelerated cell proliferation by ~20%. Leucine (0.25, 0.5, 0.75, and 1.0 …

Validation Of Weak Form Thermal Analysis Algorithms Supporting Thermal Signature Generation, Elton Lewis Freeman

Masters Theses

Extremization of a weak form for the continuum energy conservation principle differential equation naturally implements fluid convection and radiation as flux Robin boundary conditions associated with unsteady heat transfer. Combining a spatial semi-discretization via finite element trial space basis functions with time-accurate integration generates a totally node-based algebraic statement for computing. Closure for gray body radiation is a newly derived node-based radiosity formulation generating piecewise discontinuous solutions, while that for natural-forced-mixed convection heat transfer is extracted from the literature. Algorithm performance, mathematically predicted by asymptotic convergence theory, is subsequently validated with data obtained in 24 hour diurnal field experiments for …

Synthesis Of Palladium-Based Electrocatalysis—From Pure Metal To Bimetallic Nanoparticles, Haijun Gao

Masters Theses

This thesis focuses on synthesis and characterization of palladium-based nanoparticles. Background information of the research in this thesis is provided in Chapter 1. Preparation and characterization of pure palladium nanoparticles are presented in Chapter 2. A fast and convenient method to prepare ultra small Pd nanoparticles via Pluronic P123 reduction is discussed in detail. Impregnation method and poly method are also studied in this chapter. Chapter 3 reports the studies of these methods to prepare ultra small bimetallic (bimetallic means a mixture of two metals) palladium-based nanoparticles. Oleylamine-mediated method used Pd nanoparticles prepared via P123 reduction as precursor. Ultra small …

Factors Influencing The Feasibility Of Switchgrass Feedstocks: From A Biorefinery’S Perspective, Elizabeth Ann Humphreys

Masters Theses

Research suggests that biomass with high cellulose content like switchgrass is more efficient for producing ethanol than corn grain. The objective of this study is to evaluate factors influencing the economic feasibility of ethanol production from a biorefinery’s perspective using switchgrass as the only feedstock. The research conducted utilizes a model which considers switchgrass procurement costs, transportation costs, storage costs, dry matter loss, biorefinery construction costs, operating and maintenance costs, and ethanol production in determining the break-even price of ethanol. The break-even prices of ethanol estimated range from $2.02 to $2.45 per gallon. The sensitivity analysis demonstrated that when the …

Growing A Local Movement: New Social Movements, Food, And Activism, Liam Vangsnes Hysjulien

Masters Theses

Over the last decade, concerns over healthy eating, the systemic causes of hunger, and alternative ideas over food production and consumption have become more prevalent issues in mainstream American society. This has resulted in increasing literature on whether alternative food movements and local food advocates are an emerging social movement. In using Knoxville, Tennessee as a case study, this thesis explores how historical changes in food-based welfare created conditions for increased local activism around issues of hunger and food insecurity. Second, this thesis uses interviews from key local food advocates to determine how their activism is shaped by personal identity, …

Fatty Acid Synthase 1 In Candida Albicans Virulence And The In Vitro Effects Of Fluconazole, Tetracycline In Combinatorial Therapy, Marissa Mandy Rodrigues

Masters Theses

Candida albicans, the causative agent of superficial and invasive mycoses, is a significant fungal pathogen associated with high mortality rates and considerable health-related costs. The most effective class of antifungals used for the treatment of candidiasis includes polyenes, echinocandins and azoles. However with the emergence of resistant strains, new antifungals are warranted for the effective treatment of candidiasis. Genes involved in biosynthetic enzymatic pathways that regulate metabolic processes are important for the survival of pathogenic fungi and can thus be exploited for the development of better antifungals. Fatty acid synthase 1, which is involved in the de novo biosynthesis of …

Impacts Of Beetle Kill On Modeled Streamflow Response In The North Platte River Basin, Jordan Andrew Rudolph

Masters Theses

A beetle epidemic has been sweeping its way across the western United States and into portions of southern Canada that has caused millions of acres of forests to ultimately die. This beetle outbreak, that many have come to know simply as “beetle kill”, has caused many scientists to feel that such dramatic changes in land cover could potentially alter the hydrology throughout much of the West. One of the most important hydrological processes that beetle kill has the potential to impact is streamflow. This paper attempts to evaluate the hydrological impacts on streamflow from land cover change due to beetle …

Design Of A Neutron Detector Capable Of Replacing He-3 Detectors Utilizing Thin Polymeric Films, Matthew J. Urffer

Masters Theses

There exists a significant need to develop a new neutron detection system which would reduce the dependency on the current He-3 based detectors for Domestic Nuclear Detection Office (DNDO) applications. One of the technologies being developed is the use of Li-6 (thermal cross section of 940 barns) in scintillating polymeric thin films. The purpose of this research is to provide a framework for the characterization of thin polymeric films in terms of meeting the detection requirements set forth by the governing bodies, most notability a detector count rate of 2.5 cps/ng with and only misclassifying a neutron as a gamma …

Late Pleistocene Climate, Vegetation, And Fire History From A Southern Appalachian Bog, Whiteoak Bottoms, Nantahala National Forest, North Carolina, U.S.A., Mathew Stephen Boehm

Masters Theses

I examined loss-on-ignition, pollen, and charcoal evidence of climate, vegetation, and fire history at Whiteoak Bottoms (35º04’44”N, 83º31’50”W; 1032 m elevation), a peat-forming wetland located along the Nantahala River in western North Carolina. Previous research by J. McDonald and D. Leigh revealed that this wetland formed in a paleochannel of the Nantahala River between 15,000 and 14,000 cal yr BP. I obtained additional AMS radiocarbon dates, carried out high-resolution loss-on-ignition analysis, and examined pollen and microscopic charcoal assemblages in a 157-cm sediment core from the previous study. Radiocarbon dates and stratigraphic analyses indicate that much of the Holocene is missing …

Energy Balance And Carbon Dioxide Flux In Conventional And No-Till Maize Fields In Lesotho, Southern Africa, Wendy Anne Bruns

Masters Theses

The capacity of soils to sequester carbon is currently of scientific interest because soil management impacts carbon dioxide flux and can mitigate the effects of climate change. Soil carbon sequestration is also essential in areas with degraded soil where land use is primarily subsistence agriculture because of limited inputs to increase fertility and return soil nutrients removed during crop growth. Agricultural soils under no-till management can increase soil carbon levels compared to soils managed with traditional tillage practices in the long-term (decades); this is hypothesized to be caused by the short-term (i.e., seasonal) flux of carbon dioxide between the terrestrial …