Digital Commons Network^™

Resident Benthic Fishes Of Artificial Reefs In The Mississippi Sound: Effects Of Habitat Relief And Subregion, Claire Louise Matten

Master's Theses

One of the fundamental questions of artificial reef research concerns the capability of these manmade structures to promote secondary production. Many researchers have questioned whether artificial reefs increase the production of fish biomass, or simply aggregate existing fish biomass. Most previous research has focused on production of transient fish biomass, because of the high recreational and commercial value of these species. Establishing a link between transient fish production and artificial reef primary and secondary production has proved difficult. Therefore, the goal of this study was to examine the productivity of benthic fishes resident to artificial reefs in the Mississippi Sound, …

The Effects Of Stocking Density And Feeding Frequency On Aggressive And Cannibalistic Behaviors In Larval Hatchery-Reared Spotted Seatrout, Cynosion Nebulosus, Christopher Burton Manley

Master's Theses

The Spotted Seatrout (Cynoscion nebulosus) is a euryhaline fish that inhabits coastal regions from Massachusetts to Texas. Due to its predaceous nature and proximity to coastal shorelines it is the most important marine finfish in the Gulf of Mexico. Because of this importance, Spotted Seatrout has been identified as a possible candidate for stock enhancement. Stock enhancement is the practice of releasing hatchery-reared juveniles to increase local recruitment beyond existing levels. However, raising enough Spotted Seatrout in an intensive aquaculture system has proven difficult due to aggression and cannibalism during the larval stages.

The manipulation of stocking density …

The Impact Of Serotonin And Dopamine On Human Aggression: A Systematic Review Of The Literature, Caroline Isabelle Jalain

Master's Theses

Aggressive behaviors can have serious impacts on both the population at-large and the criminal justice system (Fish, DeBold, & Miczek, 2002); but despite these potential repercussions, no adequate treatment options have been identified to prevent (or reduce) such consequential actions. An increasing amount of research has, however, developed (over the years) in response to these treatment needs. Recently, the disciplines of neurobiology and neuropsychology have discovered specific anti-aggressive treatments. Studies on the prefrontal cortex specifically reveal that certain areas of the brain, along with an array of chemical imbalances, are related to aggressive behavior (Barrett, Edinger, & Siegel, 1990). Specifically, …

School, Disability Status, And Delinquency: An Examination Of Delinquency Among Rural Adolescents, Miriam Yvonne Brooks

Master's Theses

Extensive research has been devoted to identifying risk-factors that contribute to the onset of juvenile delinquency. Furthermore, evidence has suggested that a disproportionate number of adolescents with learning disabilities are confined in juvenile correctional facilities. Yet, there is a substantial gap in empirical research that explores the possible relationship between learning disabilities and delinquent behavior. The purpose of the current study is to assess how specific learning disabilities relate to various forms of delinquent behavior among adolescents from rural high schools in a southern state. Specifically, this study aims to assess how Dyslexia, Dyscalculia, and Dysgraphia relate to drug use, …

Taxonomy, Diversity, And Distribution Patterns Of Portunid Crab Megalopae In The Northern Gulf Of Mexico During Fall Of 2003, Carley Rain Knight

Master's Theses

The field of zooplankton biology contributes to more accurate stock assessments as well as to a greater understanding of the marine food web. However, adequate information for the invertebrate component of zooplankton is lacking compared to the ichthyoplankton component. In this thesis, identification of Portunidae (Crustacea: Decapoda) megalopae collected during the fall of 2003 from a NOAA SEAMAP cruise revealed 7 species and 11 morphs with 90% of the total density comprised of Callinectes sapidus, Achelous gibbesii, Callinectes similis, Achelous spinicarpus, and Achelous sp.I. Keys and detailed descriptions are provided along with photographs and morphological drawings for each morph to …

Characterization Of Biomechanical Properties Of Mitral Valve Chordae Tendineae, Keping Zuo

Master's Theses

Objective: Mitral regurgitation and prolapse are the two most common diseases of the mitral valve and result in the leakage of blood back into the left atrium during systole. Rupture of the chordae tendinae is the most common cause of mitral insufficiency. The goal of this study was to characterize the biomechanical properties of the mitral valve chordae tendineae of aged human and ovine hearts.

Materials and Methods: A total of 115 chordae specimens from fresh ovine hearts (n=18, weight = 374.833 47.947g, age of 1-2 year old), and 152 from human hearts (n=14, weight = 516.538 125.718g, mean age …

Handling Risk: Testosterone And Risk Preference, Evidence From Dhaka, Bangladesh, Tobias Sytsma

Master's Theses

The relationship between testosterone and risk aversion is of increasing interest in the experimental economics. Using the ratio of the second digit to the fourth digit (2D:4D) as a rough indicator of level of prenatal testosterone exposure, this study attempts to replicate recent results from Garbarino et al., (2011), which found that individuals with digit ratios above the sample average were significantly more risk averse, and individuals with digit ratios one standard deviation below the sample average were significantly more risk seeking in a subject pool of male and female Caucasian students. Here, a subject pool from Dhaka, Bangladesh, is …

Land As Power, An Analysis Of Female Land Inheritance And Intrahousehold Bargaining In Rwanda, Eric Adebayo

Master's Theses

Do increased levels of female land inheritance lead to increases in female intrahousehold bargaining power? Analysis of an expansive Rwandan household survey dataset from 2010-2011 suggests that female land inheritances are positively associated with female intrahousehold bargaining power. The results support the relative efficacy of intrahousehold bargaining models over that of unitary household models. The findings have implications for Rwandan lawmakers debating changes to the country's “Succession law” which makes gender discrimination in land inheritance illegal. This is the first paper of its kind to estimate female land inheritance's effect on bargaining power in Rwanda.

Determinants Of Family Planning Service Uptake And Use Of Contraceptives Among Postpartum Women In Rural Uganda, Katelyn M. Sileo

Master's Theses

Uganda is among the countries with the highest unmet needs for family planning, which is associated with both negative health outcomes for women. The present study was a cross-sectional secondary data analysis using Andersen’s Behavioral Model of Health Service Use (ABM) as a theoretical framework to identifying factors influencing family planning service uptake and contraceptive use among postpartum women in rural Uganda. Participants were 258 women who attended antenatal care at a rural Ugandan hospital and completed an interview approximately 13 weeks postpartum. Bivariate logistic regression models in SPSS were used to test hypothesized ABM factors as determinants of family …

Benzathine Penicillin G For The Prevention Of Rheumatic Fever And Rheumatic Heart Disease In The Developing World: A Global Survey Of The Quality And Quantity Of Supply, Stephen B. Marko

Master's Theses

No abstract provided.

Hemodynamics Of The Aortic Root Upon Transcatheter Aortic Valve Implantation, Joseph D. Calderan

Master's Theses

No abstract provided.

Risk And Protective Factors That Affect Married Women’S Reproductive Health In A Low-Income Community In Mumbai, India, Benjamin D. Hallowell

Master's Theses

In low and middle-income countries (LMICs), symptoms of reproductive morbidities are the most common health problem reported by women. Women in developing countries are often at higher risk for these problems due to the social, behavioral, cultural, infrastructural, and demographic barriers they face in daily life and in receiving medical treatment. Previous studies conducted in LMICs have found an association between women’s self-reported symptoms of reproductive morbidity and negative life situations and have suggested, that rather than a biomedical issue, women in LMICs may express these symptoms to reflect other problems in their lives. Currently, however, women who self-report symptoms …

Efficacy Of Plant Compounds For Reducing Foodborne Pathogens On Fresh Produce, Tyler E. Mattson

Master's Theses

Four plant derived compounds, namely carvacrol (CAR), trans-cinnamaldehyde (TC), eugenol (EUG) and β-resorcylic acid (BR) were investigated as wash treatments for reducing Salmonella spp. on tomatoes. In addition, the efficacy of TC and CAR in inactivating E. coli O157:H7 and L. monocytogenes on iceberg lettuce in the presence and absence of 10% organic matter was studied. Results suggest that CAR, TC, EUG and BR were effective in rapidly reducing large populations of Salmonella spp. on tomatoes when used in wash water, and CAR rapidly decreased E. coli O157: H7 and L. monocytogenes populations on lettuce even in …

Continuous Polynomial Adaptive Estimator For Nonlinearly Parameterized Systems, Haitham B. Felemban

Master's Theses

This the sis present the continuous polynomial adaptive estimator CPAE which estimates a nonlinear parameter in nonlinearly parametrized NLP system. It combines the multiple region law with the companion adaptive system presented in [1] to come up with the CPAE. Stability is discussed and general definition of persistence of excitation PE condition is proposed for parameter convergence using the CPAE. As an application, the CPAE was successfully used to estimate the airspeed in presence of airspeed sensor failure on a developed academic aircraft model. As part of Loss of Control Prevention through adaptive reconfiguration project supported by NASA, the IMU …

Dna-Functionalized Gold Nanoparticles For Chemiresistive Vapor Sensing, Kan Fu

Master's Theses

Chemiresistive sensing with functionalized gold nanoparticles is a powerful new technology for vapor sensing. Utilizing changes in behavior of electron tunneling through conductive gold nanoparticles and insulating organic capping layers upon analyte adsorption, this system can achieve intrinsically high sensitivity and rapid response time. A number of thiol-based small-molecule organic ligands have already been successfully used to functionalize gold nanoparticles, yielding an array of organic sensors having various sensitivities towards different organic vapors. With the aid of chemometric analysis tools, gold nanoparticle-based chemiresistive sensors have been rapidly maturing into a vapor quantification and identification technology.

A limiting factor for its …

Characterization Of Changes In Composition And Physicochemical Properties Of Casein Micelles From Raw Milk To Buttermilk, Melissa Ann Looney

Master's Theses

It is well-documented that buttermilk has poor coagulation properties due to changes that occur to the casein micelles during the butter-making process. These modifications are generally attributed to the pasteurization of the cream upon which interactions between the proteins are promoted. It was hypothesized that churning is also a critical step for the changes that occur in composition of the casein micelles. The objective of this work was to learn more about the interactions that occur between casein micelles and MFGM components during the butter making process.

Raw cream was processed using a rotary churn at 18°C for approximately 30 …

Gender Identity, Ethnic Identity, And Self-Esteem In Latino Adolescent Males, Miriam Asya Reder

Master's Theses

The relationship between gender identity and psychological adjustment has long been investigated, but it is only in the 21^st century that gender identity has been examined as a multi-faceted construct. According to Egan and Perry (2001), there are five dimensions comprising a person’s gender identity and they have demonstrated a significant relationship between these dimensions and youth’s psychological adjustment. Three of their gender identity constructs are pertinent to this study: gender typicality, gender contentedness, and felt pressure. While subsequent studies have had similar significant results (Carver, Yunger, & Perry, 2003; Yunger, Carver, & Perry, 2004), one study found that …

Investigation Of Degradation Effects Due To Gate Stress In Gan-On-Si High Electron Mobility Transistors Through Analysis Of Low Frequency Noise, Michael Curtis Meyer Masuda

Master's Theses

Gallium Nitride (GaN) high electron mobility transistors (HEMT) have superior performance characteristics compared to Silicon (Si) and Gallium Arsenide (GaAs) based transistors. GaN is a wide bandgap semiconductor which allows it to operate at higher breakdown voltages and power. Unlike traditional semiconductor devices, the GaN HEMT channel region is undoped and relies on the piezoelectric effect created at the GaN and Aluminum Gallium Nitride (AlGaN) heterojunction to create a conduction channel in the form of a quantum well known as the two dimensional electron gas (2DEG). Because the GaN HEMTs are undoped, these devices have higher electron mobility crucial for …

Evaluation Of Red Alder Mortality In The Little Creek Watershed Following The 2009 Lockheed Fire, Dylan Robert Theobald

Master's Theses

Five hundred eighty red alder along a 2.16 km portion of the Little Creek riparian zone were assessed for mortality following the 2009 Lockheed Fire near Davenport, California. The study area was divided into burn severity zones and every red alder within the riparian zone was observed and assessed for mortality. Height, diameter at breast height (DBH), and age were collected on selected trees. An estimation of red alder large woody debris (LWD) input to Little Creek since a 2010 LWD survey (Smith, 2010) was calculated using average red alder tree dimensions applied to Smalian’s formula (MLNRO, 2011). The mean …

Territorial Behavior And Cortical Brain Plasticity In Adult Male Sceloporus Occidentalis, Daniel R. Pfau

Master's Theses

The hippocampus is a brain region that can undergo tremendous plasticity in adulthood. The hippocampus is related to the formation of spatial memories in birds and mammals. In birds, plasticity in the hippocampus occurs when formation of such memories is directly relevant to survival or reproduction, such as for breeding or food caching. In reptiles, the homologues to the hippocampus are the dorsal and medial cortices (DC and MC). In several lizard, snake and turtle species, these structures have been related to spatial memory. Experimental investigations indicate that differences in DC volume are related to space use associated with differing …

The Ecological Effects Of Cattle Grazing On Reptiles And Small Mammals In A San Joaquin Valley Grassland, Michael William Tom

Master's Theses

Livestock grazing is a common and extensive land use practice in the United States occurring in a wide range of habitat types. As such, livestock grazing has the potential to alter ecosystem structure, function and community composition. The primary component (Chapter 1) of this thesis examined the effects of cattle grazing in a San Joaquin Valley grassland on two target taxa: reptiles and small mammals. The study took place on the Chimineas Unit of the Carrizo Ecological Reserve, San Luis Obispo County, California during Fall 2009 and Spring 2010. These taxa were sampled on matched pairs of two grazed and …

Plant Invasion Along An Urban-To-Rural Gradient, Carolyn O. Ariori

Master's Theses

Humans are the most important drivers of invasive species introduction and natural habitat transformation globally. Ecological differences between areas of dense human habitation and minimally managed natural habitats were explored across an urban-to-rural gradient of land use in southern New England. These differences were examined through presence/absence and leaf functional traits for a set of invasive species; and urban and rural environmental conditions. Some species were more restricted to particular sites than others along the urbanization gradient, based on introduction history and habitat preference. A priori urban-classified species showed trait values associated with drought tolerance, including higher LWR, greater leaf …

Roubaud's Circus: Playing With Words And Animals In Les Animaux De Tout Le Monde, Miranda R. Mueller

Master's Theses

It is commonly held that there is a solid, defined line existing between men and animals. This thesis explores the ideological boundary and, through a close examination of Jacques Roubaud’s collection of poetry Les animaux de tout le monde, imagines the line as a fluid structure that can be broken, approached, and multiplied.

In a circus theme following the playful style of Roubaud’s own verses, I include several close readings of poems as well as an analysis of Roubaud’s influence from Lewis Carroll’s nonsense genre, the Fables of Jean de la Fontaine, and Medieval bestiaries in order to create a …

The Relationship Between Obesity And Occupations Among The U.S. Population Based On Occupational Tasks, Luz D. Flaherty

Master's Theses

No abstract provided.

A Social Ecological Approach: Understanding The Factors Associated With Hiv Risk In Fishing Communities In Lake Victoria, Uganda., Paola Chanes-Mora

Master's Theses

Uganda has an estimated 1.4 million Human Immunodeficiency Virus (HIV) -positive adults (United Nations Program on HIV/AIDS [UNAIDS], 2011). The initial cases of acquired immune deficiency syndrome (AIDS) in Uganda were identified in fishing villages on the shores of Lake Victoria in 1985 (Serwadda et al., 1985). Fishing villages continue to remain at high risk of HIV transmission (United Nations Program on HIV/AIDS [UNAIDS], 2012). Evidence suggests that the HIV- prevalence rates among fishermen and commercial sex workers (CSWs) in the Wakiso District are more than 20 percent (Alex, Michael, & Nordin, 2011). The purpose of this study was to …

Effects Of Urbanization On Sediment Microbial Communities In Lotic Ecosystems, Bradley Drury

Master's Theses

The world is becoming increasingly urbanized, with the majority of the world's population now living in urban areas. Urbanization has the potential to significantly alter lotic ecosystems and the services they provide. Benthic microbial communities are key components of lotic ecosystems due to their contributions to primary production and nutrient cycling. Two types of human inputs associated with urbanization that may impact benthic microbial communities in lotic ecosystems are the input of wastewater treatment effluent and the input of emerging contaminants, including pharmaceuticals and personal care products. This work examines the effects of treated WWTP effluent on benthic microbial communities …

Culture Wars: A Quest For Justice In Arizona, Crystal Lynne Pfeiffer

Master's Theses

The Southwest is the location of an ongoing culture clash between proponents of a unified "American" culture and Mexican-American culture. The significance of the debate is not just about Mexican-American studies; it reflects a broader debate about individual and collective identity in the United States. The two cultures have historically had a contentious relationship that is further intensified by their geographical proximity to one another. Some of the tensions have culminated in a conflict within the school system between supporters and opponents of Mexican-American studies. One side of the debate sees the program as a means to help students succeed …

Proteomic Analysis Of Mammary Epithelial Cell Development, Alyssa Kay Conly

Master's Theses

In this set of studies, a proteomic approach was used to investigate the protein profile of the mammary epithelial cell (MEC) through different stages of mammary development. The HC11 cell line was used to investigate protein changes between undifferentiated and differentiated MEC, which represent the pregnant and lactating states of the cells. This comparison revealed an interesting differential expression profile underscoring many recognized processes that occur in differentiated MECs, while others unveiled differences between MEC differentiation in vitro and in vivo. Primary MEC were also isolated from virgin, pregnant, and primiparous quiescent mice to compare the virgin state of the …

Computational Fluid Dynamics Modeling Of Two-Dimensional And Three-Dimensional Segmented Flow In Microfluidic Chips, Katrina Jolene Donovan

Master's Theses

Microfluidics is a rapidly growing topic of interest for scientists, engineers, and medical researchers. The micrometer length scale constrains flow to a laminar behavior, allowing for a more predictable system. High-throughput experimentation is possible with laminar multiphase flow, specifically microdroplets. Manipulating microdroplets by generating, splitting, separating, and fusing provides a versatile environment for analysis in a variety of biological and chemical systems.

The process of design, fabrication, and testing of microfluidic systems is an iterative and tedious procedure. The purpose of this research was to utilize computational fluid dynamics software to expedite the fabrication and design process by simulating time-dependent …

Effects Of Temperature On Sexual Competition In Kelps: Implications For Range Shifts In Foundation Species, Alexis Cynthia Howard

Master's Theses

Kelp populations inhabit some of the most dynamic environments on the planet and often exist close to the limits of their temperature tolerances. Temperature cues reproductive processes in many kelps and fluctuating temperatures can affect kelp recruitment and population persistence. Some kelps compete sexually through their microscopic life history stages by releasing a pheromone that triggers the premature release of spermatozoids of neighboring species, leading to recruitment failure. It is unknown, however, whether changing temperature modifies competitive hierarchies among kelp species. To address this issue, I investigated how temperature affects sexual competition between microscopic stages of three co-existing and possibly …