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An Ensemble Study Of The Sea Level Rise Impact On Storm Surge And Inundation In The Coastal Bangladesh, Mansur Ali Jisan

Electronic Theses and Dissertations

The hydrodynamic model Delft3D is used to study the impact of Sea Level Rise (SLR) on storm surge and inundation in the coastal region of Bangladesh. To study the present-day inundation scenario, track of two known tropical cyclones (TC) were used: Aila (Category 1; 2009) and Sidr (Category 5; 2007). Model results were validated with the available observations. Future inundation scenarios were generated by using the strength of TC Sidr, TC Aila and an ensemble of historical TC tracks but incorporating the effect of SLR. Since future change in storm surge inundation under SLR impact is a probabilistic incident, that’s …

An Exploratory Study On The Possible Effect Of Hydraulic Fracturing Activities On Air Quality In The Eagle Ford Shale Region Of Texas., Laura B. Fimibama

Electronic Theses and Dissertations

Eagle Ford Shale (EFS) play is one out of five major oil and gas formations in Texas, found in the South-Eastern region with approximately 30 counties. In addition to natural gas, it produces crude oil and petroleum liquids which in recent times has resulted in a surge in drilling due to a new drilling technology – hydraulic fracturing that injects massive quantities of water along with sand and chemical additives into a well to create tiny hairline cracks in rock formations. The success of this technology has made gas extraction more economically feasible. However, this technique has generated an array …

Cloning And Expression Of Bovine Alpha S1 Casein Peptides Of Variable Size And Position Of Sppep Inhibitor Sequence, Avleen Kaur Vishram

Electronic Theses and Dissertations

Eurygaster integriceps Puton (Sunn pest) is the most damaging insect pest of wheat in areas of North Africa, Eastern Europe and Western and Central Asia. Sunn pest injects an enzyme characterized as a prolyl endylprotease (spPEP) into wheat grains that digests the gluten protein (Darkoh et al., 2010). Previous studies have shown that casein peptides generated by Lactobacillus species have inhibitory effects on human (hPEP) and bacterial prolyl endoproteases (bPEP) which makes casein a good natural candidate to inhibit spPEP. Developing biopesticides for food products from αS1 casein is complicated due to some allergenic amino acid sequences. Ruiter et al …

Geologic And Geochemical Characterization Of Cross-Communication Potential Within The Northern Edwards Aquifer System, Texas, Ingrid J. Eckhoff

Electronic Theses and Dissertations

The Edwards Aquifer is a large, complex groundwater system located throughout Central Texas in association with the Balcones Fault Zone. The San Antonio and Barton Spring segments of the Edwards Aquifer have been extensively studied in the past because they provide groundwater resources to the largely urbanized areas of San Antonio and Austin, respectively, and smaller communities along the Interstate 35 corridor. Previous research has been conducted on these southern and central portions of the Edwards Aquifer system, which have characterized the structural, hydrogeological and geochemical variations within the highly karsted region. However, the Northern Segment of the Edwards Aquifer …

Observations And Light Curve Analysis Of Transiting Extra-Solar Planets, Clark M. Holcomb

Electronic Theses and Dissertations

The purpose of this research was to perform the procedures to study transiting exoplanets in their entirety, from the data collection process to determining physical characteristics and orbital properties. The research was conducted with two telescopes of different sizes (16” and 12”) at multiple sites in order to refine the detection process. Both Maxim DL and Mira Pro x64 software were used to process the resulting images. The PHOEBE program was used to model the data to determine the properties of the exoplanets, which were then compared to the results obtained by other astronomers. The data collection process as well …

Tobacco Use, Cessation, And Locus Of Control Among College Students, Bernard Ambe

Electronic Theses and Dissertations

ABSTRACT

The purpose of this study was to (a) determine the locus of control among American college students (b) determine if tobacco use or cessation correlate with any demographic variables to better understand the efficacy of tobacco interventions and help design an intervention most effective in the prominent LOC of college students.

The Global Adult Tobacco Survey (GATS) was modified for the purposes of this study and used to determine demographic factors and tobacco usage status. The modified GATS survey also included the LOC questionnaire which yielded the data. Seventy-four responses were recorded. The mean locus of control scores were …

Effect Of Reproductive Efficiency In Regards To Workload On Peripheral Circulations Of Blood Cortisol And Leptin In The Open Mare, Michaelle K. Coker

Electronic Theses and Dissertations

ABSTRACT

Effect of Reproductive Efficiency in Regards to Workload on Peripheral Circulations of Blood Cortisol and Leptin in the Open Mare

(December, 2016)

Michaelle Kathleen Coker, B.S., Texas A&M University

Thesis Director: Dr. John Michael Mehaffey

Quarter and Paint horse mares (n= 9) were randomly assigned to 1 of 3 groups after being blocked based by expected conception date. Groups consist of mares on no work (NW), light work (LW), and moderate work (MW). Blood was taken weekly via jugular venipuncture prior to first heat cycle from each mare. Additionally, blood was taken at time of ovulation and then weekly …

Zirconium Diboride, Hexagonal Boron Nitride, And Amorphous Alumina Thin Films For High Temperature Applications, David Murdock Stewart

Electronic Theses and Dissertations

The use of microelectronic sensors and actuators in harsh, high temperature environments, such as power plants, turbine engines, and industrial manufacturing, could greatly improve the safety, reliability, and energy efficiency of these processes. The primary challenge in implementing this technology is the breakdown and degradation of thin films used in fabricating these devices when exposed to high temperatures >800 °C and oxidizing atmospheres. Zirconium diboride, hexagonal boron nitride, and amorphous alumina are candidate materials for use as thin film sensor components due to their high melting temperatures and stable phases. Zirconium diboride thin films have metallic-like electrical conductivity and remain …

An Analysis Of Gulf Of Maine Cod Metapopulation Structure And Localized Stability, With Application To Area-Based Fisheries Management, Derek Olson

Electronic Theses and Dissertations

The complex metapopulation structure of groundfish stocks in the Gulf of Maine, particularly Atlantic cod (Gadus morhua), is largely ignored under the current system of broad-scale stock assessment and management. This mismatch of biological and administrative scales has contributed to severe overall stock decline and localized serial depletion of Gulf of Maine cod. Such chronic management failure has led to growing calls for a more area-based, finer-scale approach to managing groundfish in the Gulf of Maine. A primary difficulty hindering the development of finer-scale groundfish management has been the challenge of estimating fishing mortality upon local stock components. …

Wabanaki Access To Sweetgrass (Hierochloe Odorata) Within Coastal Maine's Diminishing Open Land Tradition, Amanda Marie Ellis

Electronic Theses and Dissertations

Nontimber forest products (NTFPs), refer to a class of resources (i.e. moss, fungi, mushrooms, plants, etc.) gathered in both rural and urban landscapes. NTFPs are utilized by a variety of cultures all over the world and are a critical part of medicinal, spiritual, dietary, and economic practices. In fact, some NTFP species are so critical to people that they are considered ‘cultural keystone species’ (Garibaldi and Turner 2004). This designation means that without access to the NTFP, cultural survival is at risk. This is the case in Maine where the Wabanaki, a confederacy of four tribes (Passamaqouddy, Penobscot, Mikmaq, and …

Roles Of Siphon Flows In Suspension Feeding, Kevin Du Clos

Electronic Theses and Dissertations

Benthic marine suspension feeders provide an important link between benthic and pelagic ecosystems. The strength of this link is determined by suspension-feeding rates. Many studies have measured suspension-feeding rates using indirect clearance-rate methods, which are based on the depletion of suspended particles. Direct methods that measure the flow of water itself are less common, but they can be more broadly applied because clearance-rate measurements are affected by properties of the cleared particles. We present pumping rates for three species of suspension feeders, the clams Mya arenaria and Mercenaria mercenaria and the tunicate Ciona intestinalis, calculated using a direct method …

Sperner's Lemma, The Brouwer Fixed Point Theorem, The Kakutani Fixed Point Theorem, And Their Applications In Social Sciences, Ayesha Maliwal

Electronic Theses and Dissertations

Can a cake be divided amongst people in such a manner that each individual is content with their share? In a game, is there a combination of strategies where no player is motivated to change their approach? Is there a price where the demand for goods is entirely met by the supply in the economy and there is no tendency for anything to change? In this paper, we will prove the existence of envy-free cake divisions, equilibrium game strategies and equilibrium prices in the economy, as well as discuss what brings them together under one heading.

This paper examines three …

The Forgotten Cousin In Freshwater Community Ecology: Tidal Freshwater Wetlands, Jack R. Mclachlan

Electronic Theses and Dissertations

Tidal freshwaters are unique in their placement in the landscape, forming where freshwater riverine flows are sufficient to overwhelm the saline water of the incoming tide, but not strong enough to suppress tidal water-height fluctuations. Tidal freshwaters and their wetlands have been overlooked by freshwater and marine researchers alike; neither discipline considers tidal freshwaters to fall under their purview. Invertebrate communities in tidal freshwaters are thought to be species depauperate; the consensus is that they support fewer taxa than nearby non-tidal freshwaters, but little is known about how these communities are structured. This study investigated how tidal hydrology, an atypical …

Experimental Methods And Practices For The Study Of Toroidal Inflated, Braided Fabric Members, Daniel J. Whitney

Electronic Theses and Dissertations

Inflatable structures have become a very important area of interest for many differing applications where lightweight packable structures are required. NASA is developing Hypersonic Inflatable Aerodynamic Decelerator (HIAD) technology that takes advantage of stacked, inflated fabric tori to form a decelerating spacecraft nose cone. The tori consist of a bladder, braided fabric shell, and reinforcing in the form of integral cords or externally bonded straps. The focus of this thesis is on the development of methods for the structural testing of inflated fabric tori and developing an enhanced understanding of their behavior. This is essential for providing insight into the …

The Influence Of The Invasive Chinese Tallow (Triadica Sebifera) Leaf Litter On Aquatic Chemistry And Microbial Community Composition, Raymond D. Montez

Electronic Theses and Dissertations

Global climate change and anthropogenic activity have facilitated the movement and invasive potential of nonnative plants in native environments. These invasions can have negative effects on ecosystem diversity and function. The nonnative and invasive plant, Chinese Tallow (Triadica sebifera), has already invaded much of the south eastern US where it is outcompeting native tree species and changing ecosystem diversity in a variety of habitats. Leaf litter from the Chinese tallow has been shown cause changes in dissolved oxygen and pH in the aquatic environment. Turbidity is also affected when Chinese tallow litter is present in water. A series of …

Chemical And Non-Chemical Control Of Potato Pink Rot, Xuemei (Missi) Zhang

Electronic Theses and Dissertations

Pink rot of potato (Solanum tuberosum) is a widespread soilborne disease that causes significant losses in the field and storage. It is caused by Phytophthora erythroseptica (Pethybr.), an oomycete pathogen that produces sexual spores that can survive in soil for years. The management of pink rot mainly relies on chemical control. However, the most effective chemical in pink rot control, mefenoxam, is losing its efficacy owing to the development of mefenoxam resistance in P. erythroseptica. To evaluate alternative fungicides (including chemical and biological fungicides) to mefenoxam in pink rot control, two greenhouse experiments and three field trials …

Monotonic Testing Of Fully And Partially Anchored Wood-Shear Walls, Sean Michael Pezeshk

Electronic Theses and Dissertations

Currently in the United States of America (USA), there are around 125 million single-family dwellings (SFDs), most of which consist of wood-frame construc-tion (SSA 2015). Traditionally wood frame construction SFDs have performed well in seismic events but more efficient designs against earthquake loads is de-sired. More than 143 million Americans are living in seismic regions and nearly 28 million live in high seismic regions (SSA 2015). During an earthquake event, the lateral forces created are characterized as cyclic and random. The main lateral force resisting system for these wood-frame SFDs is the shear wall, there-fore it is critical that the …

Carrie Mae Weems And The Construction Of Visual Text, W Michael Mosby

Electronic Theses and Dissertations

Once photography's democratization of image started to take root in mid-1800's the evolution of the projected character of Emancipated African American became entwined with the visual, as well as the literary. My work examines MacArthur Fellow Carrie Mae Weems's series From Here I Saw What Happened and I Cried as a contemporary literary text in direct dialogue with Frederick Douglass's ideas about photography's place in the regeneration of "self-image" for the new race of free African Americans. Weems's use of historical photographs originally intended to reinforce the same stereotypes Douglass hoped to defeat reclaims the individual in each image of …

An Analysis Of The Relationship Between The Perceptions Of Value-Added Measurement And Teacher Job Satisfaction, Meagan A. Viar

Electronic Theses and Dissertations

Educational leaders are struggling with the issue of academic reform as it pertains to accountability for student achievement. With increasing pressures to improve student achievement, many states have adopted value-added measures to monitor student growth and teacher effectiveness. This study undertook a quantitative approach to examine the relationship between teacher perceptions of value-added evaluations, teachers' three-year mean value-added scores, and teacher job satisfaction using One-Way Analysis of Variance (ANOVAs). The four major questions posed in this study are as follows: 1) What are selected TN teachers' perceptions of the TVAAS-based teacher evaluation system in terms of fairness, accuracy, understandability, and …

Converting Clinician To Educator: Preparation For Dental Education By Continuing Professional Education, Lynn Samons Russell

Electronic Theses and Dissertations

Healthcare education is of the utmost importance for all individuals in our society. Those that teach in healthcare professional programs are often unprepared for the challenges that are present. Ill-prepared educators may or may not provide a quality education to those students who will eventually care for us. This research addresses this problem by questioning dental and dental hygiene educators currently involved in educating students. It further focuses on the manner in which the interviewed individuals have been prepared to offer instruction and whether that preparation has been adequate. Data was obtained by semi-structured interviews of dental educators who had …

Metabolic Alteration Induced By Time Restricted Feeding At Different Points In The Circadian Cycle, Laura Brooks Crone

Electronic Theses and Dissertations

The goal was to determine if a high fat diet given in a time restricted fashion can protect against obesity and inflammatory mediators. 12 week old C57BL/6 male mice were assigned to either a standard chow diet or a diet containing 45% fat. The high fat diet was provided ad libitum or in a time restricted fashion, either during the first of the second half of the active phase for 8 weeks. Time restricted meal intake reduced body mass gain, adiposity, glucose intolerance and cholesterol levels in mice fed a high fat diet. Mice fed a high fat diet, even …

The Effect Of Melatonin Upon Post-Acute Withdrawal Among Males In A Residential Treatment Program (M-Paws): A Randomized, Double-Blind, Placebo Controlled Trial, Corry D. Bondi

Electronic Theses and Dissertations

The study goal was to assess melatonin as an adjuvant treatment along with current pharmaco- and behavioral therapy for 28 days on weekly self-reported severity of anxiety, depression, stress, and sleep complaints as well as how sleep is affecting daily life in a sample of males in recovery from chemical dependency at a single, residential treatment site, Salvation Army Harbor Light Center in Pittsburgh, PA. This study was a single-center, randomized, double-blind, placebo-controlled, parallel group trial of 28 days. Participants were randomized to melatonin (5 mg) or placebo and instructed to administer the intervention nightly at bedtime. Primary self-reported outcome …

Microstructural Analysis Of Thermoelastic Response, Nonlinear Creep, And Pervasive Cracking In Heterogeneous Materials, Alden C. Cook

Electronic Theses and Dissertations

This dissertation is concerned with the development of robust numerical solution procedures for the generalized micromechanical analysis of linear and nonlinear constitutive behavior in heterogeneous materials. Although the methods developed are applicable in many engineering, geological, and materials science fields, three main areas are explored in this work. First, a numerical methodology is presented for the thermomechanical analysis of heterogeneous materials with a special focus on real polycrystalline microstructures obtained using electron backscatter diffraction techniques. Asymptotic expansion homogenization and finite element analysis are employed for micromechanical analysis of polycrystalline materials. Effective thermoelastic properties of polycrystalline materials are determined and compared …

Investigating The Relationship Among Sleep, Stress, And Body Mass Index In At-Risk First-Year College Students, Grace A. Violette

Electronic Theses and Dissertations

The study objective was to investigate relationships among body mass index (BMI), sleep quality/duration, and perceived stress in 1,176 first semester college students who enrolled in Get Fruved, an 8-state social marketing intervention to prevent unwanted weight gain. Research was limited to first-year college students at-risk for unwanted weight gain. Eligibility was based on self-report of inadequate fruit and vegetable intake and subjects meeting one or more health-risk criteria (e.g., high BMI). Students (mean age=181 years; 65% white) completed physical measurements and an online survey, including the Pittsburgh Sleep Quality Index (PSQI) (score range 0-21; ˃5=disordered sleep) and the Cohen …

A Comparison Of Global Climate Reanalysis And Climate Of South Greenland And The North Atlantic, Jeff Auger

Electronic Theses and Dissertations

Global climate reanalysis models are regularly used in many scientific fields concerning climate and atmospheric observation. This thesis utilizes reanalysis models in two chapters in order to gain insight into North Atlantic climate teleconnections and their relation to precipitation across South Greenland. This first chapter of this thesis compares the four most recent reanalysis models – ECMWF Reanalysis Interim (ERA-I), NCEP Climate Forecast System Reanalysis (CFSR), JMA 55-year Reanalysis (JRA-55), and NASA Modern-Era Retrospective Analysis for Research and Applications (MERRA) – and develops from these models a monthly-mean ensemble average of common meteorological variables for the period 1979-2013. Results from …

Structural And Functional Analysis Of Grapefruit Flavonol-Specific-3-O-Gt Mutant P145t, Sangam Kandel Mr

Electronic Theses and Dissertations

This research is focused on the study of the effect of mutating proline 145 to threonine on the substrate and regiospecificity of flavonol specific 3-O-glucosyltransferase (Cp3GT). While the mutant P145T enzyme did not glucosylate anthocyanidins, it did glucosylate flavanones and flavones in addition to retaining activity with flavonols. HPLC was used for product identification and showed mutant P145T glucosylated naringenin at the 7-OH position forming naringenin-7-O-glucoside and flavonols at the 3-OH position. Homology modeling and docking was done to predict the acceptor substrate recognition pattern and models were validated by experimental results. In other related work, …

Computational Quantum Chemistry Studies Of The Stabilities Of Radical Intermediates Formed During The Oxidation Of Melatonin, Constance E. Warden

Electronic Theses and Dissertations

Melatonin, a nontoxic natural antioxidant, is of interest as a possible spin trap for use in spectroscopic methods to observe and identify short-lived free radicals, which have been linked to oxidative stress that may result in serious health problems. However, the reaction mechanisms for the oxidation of melatonin to form the product N¹-acetyl-N²-formyl-5-methoxykynuramine are still not well understood. Computational quantum chemistry studies have been done on four proposed reaction mechanisms, involving the following major intermediate structures: a dioxetane, an epoxide, a melatonin radical cation, and a spin radical adduct. Molecular geometries were optimized at the …

Elementary Principal Perceptions Of The Tennessee Educator Acceleration Model, Jason W. Vance

Electronic Theses and Dissertations

The Tennessee Educator Acceleration Model (TEAM) had been in a state of reform since being awarded the Race to the Top Grant. Few teachers admit that an evaluation influenced them significantly; additionally, few administrators agreed that when they evaluated a teacher, it did not significantly affect the teacher or students. The purpose of this qualitative study was to determine the perceptions of building‑level principals regarding the effectiveness (i.e., increased teacher participation and quality) and efficiency (i.e., produces the required results) of the TEAM in regard to teacher evaluations. Four elementary school principals from East Tennessee participated in the study. The …

Investigating Barriers To Mental Health Care In Law Enforcement Officers, Samantha F. Johnson

Electronic Theses and Dissertations

The profession of law enforcement is an inherently stressful job. Although the physical stress of the job is often discussed, the mental health impact on officers is often ignored, resulting in poor mental health and increased risk for suicide. The purpose of the current study was to investigate factors related to the reluctance of law enforcement officers (LEOs) to seeking treatment, as well as to gain an understanding of the prevalence rates of disorders in a law enforcement population. Convenience sampling was used to recruit participants (N = 306) across a variety of agencies. Correlation, moderated regression analysis, and structural …

Pharmacokinetics, Tissue Distribution, Synergistic Activity, And Antitumor Activity Of Two Isomeric Flavones, Crystal L. Whitted

Electronic Theses and Dissertations

Flavonoids are polyphenolic secondary metabolites found in plants that have bioactive properties including antiviral, antioxidant, and anticancer. Two isomeric flavone were extracted from Gnaphalium elegans and Achyrocline bogotensis, plants used by the people from the Andean region of South America as remedies for cancer. 5,7-dihydroxy-3,6,8-trimethoxy-2-phenyl-4H-chromen-4-one (5, 7–dihydroxy- 3, 6, 8 trimethoxy flavone/ flavone A) and 3,5-dihydroxy-6,7,8-trimethoxy-2-phenyl-4H-chromen-4-one (3, 5–dihydroxy-6, 7, 8–trimethoxy flavone/ flavone B) have shown antineoplastic activity against colon cancer cell lines dependent upon their differentiation status. Pharmacokinetic studies reported herein were used to determine dosing for antitumor assays, as well as determine target tissue concentration. These included the …