Digital Commons Network^™

Synthesis And Characterization Of C8 And N2 2'-Deoxyguanosine Adducts Of 6-Nitrochrysene, A Cancer-Causing Agent, Kimberly R. Rebello

Master's Theses

Nitropolycyclic aromatic hydrocarbons are ubiquitous in the environment, and many compounds of this family are carcinogenic. 6-Nitrochrysene, a representative member of this group, is a suspected human carcinogen that has been shown to cause lung, breast, and other forms of cancer in rodents. It is believed that this derivative of chrysene causes cancer by forming DNA adducts, which, in turn, induce mutations in critical gene sequences. The goal of my research is to synthesize one or more of the major DNA adducts formed by 6-nitrochrysene, which will be introduced in DNA in order to study their biological effects.

The initiation …

Effects Of Auditory And Visual Variability On Word Learning In Children: A Pilot Study, Kelly A. Casey

Master's Theses

For infants, acquiring vocabulary for nouns is a dynamic, complex process that involves pairing an auditory token with a visual referent. This process is computationally complex because the acoustic information produced for a verbal production of any given noun varies considerably due to factors including the person who is speaking, speaking rate, and linguistic context. Likewise, visual referents are also variable in characteristics such as size, shape, material, and color. Research suggests that variability in either the auditory or visual domains can facilitate early word learning. However, the role of simultaneous variability in these domains on noun learning remains unexplored. …

The Relationship Between Drug Use And Depressive Symptoms Among High School Students, Andrea Huntley

Master's Theses

No abstract provided.

The Effects Of Three Shoeing Methods On Hoof Growth And Health In Horses, Amanda Morris

Master's Theses

Fourteen mixed breed mares and geldings ranging in age from 4 to 20 years were selected to participate in this study to determine the effects on hoof growth and health with three shoing method. Each horse was randomly assigned a treatment: shod, barefoot, or Easyboots. Measurements were taken on the body and on the hoof at the beginning and conclusion of each shoeing method. Global Positioning Systems (GPS) were attached to each horse using a surcingle during turnout at the beginning and conclusion of each shoeing method.

There were minimal changes in morphometric measurements between the barefoot, Easyboot and shod …

Assessing Knowledge And Attitudes Of The Human Papillomavirus Infection And Vaccine Among Adolescents In Hartford, Ct, Anita C. Chandrasekaran

Master's Theses

No abstract provided.

“Un Pueblo Tan Dulce”: Diabetes, Depression, And Obesity Syndemics In Puerto Rico, Shir Lerman

Master's Theses

No abstract provided.

The Impacts Of Youth Conservation Corps On Participants: A Multi-Method Examination 2015, Nicholas Justin Prechel

Master's Theses

The purpose of this study was to examine the benefits that participants receive from serving in youth conservation corps. The entire population of one youth conservation corps was selected to participate in the study during the summer of 2012 trail work season. The study utilized a mixed-method approach that included a one-time pre/posttest with a retrospective pretest adapted from the American Camp Association’s Youth Outcomes Battery (YOB) and an open ended interview session. Of the 109 participants in the field at the time, 101 chose to participate in the quantitative survey. The YOB tested four areas: independence, responsibility, teamwork, and …

The Relationship Between Motivation And Volunteer Satisfaction In Conservation Programs 2015., Raena Blumenthal

Master's Theses

Conservation leisure service organizations are relying more heavily on volunteers to sustain their services and protect natural resources (Strigas, 2006). However, research focusing on volunteer vacationers, those who spend money to volunteer, is still in its infancy. Drawing on functional theorizing (Bruyer & Rappe, 2007; Clary, Snyder, Ridge, Copeland, Stukas, Haugen, & Miene, 1998; Houle, Sagarin, & Kaplan, 2005; Katz, 1960; Smith, Bruner, & White, 1956), this study explored volunteer vacationers’ motivations and the relationships between motivations to volunteer, satisfaction with the volunteer vacation experience, and inclinations to volunteer in the future (in both local and nonlocal settings). The study …

Prison-Based Animal Programs: A Descriptive Analysis, Alicia M. Loe

Master's Theses

There are many types of programs used in prisons. One such type is known as prison-based animal programs (PAPs). Prison-based animal programs bring animals into facilities in order to help offenders with emotional and behavioral problems. However promising these programs are, there is little empirical research. If these programs are to be continued, more research is needed. There has only been one national study looking at PAPs (Furst 2006). This current study will help fill the gap on PAP research. A national study was conducted using 302 randomly selected correctional facilities. Characteristics of PAPs were gathered through the use of …

Geographic Patterns Of Genetic Distribution Within Calochortus Gunnisonii In The Central And Southern Rocky Mountains, Ryan Scott Fuller

Master's Theses

Organismal population ranges and genetic architecture have largely been shaped by climatic events. The Quaternary Period (2.6 million years to present) has been characterized by a series of climatic events manifested as Ice Ages. During glacial periods, plants and animals in temperate and arctic regions were restricted to small patches of suitable habitat less affected by expanding glaciers and extreme cooling. These refugia held importance for the persistence of organisms through glacier interphases. Mountain system vegetation in temperate latitudes was affected by patchy glacier patterns that separated some species into multiple refugia. The isolation of such populations has had a …

Can Dolphins Cooperate To Solve A Novel Task?, Kelley Ann Winship

Master's Theses

Bottlenose dolphins cooperate in a variety of contexts, including foraging,acquiring mates, playing, and assisting distressed conspecifics. To better understand the capacity for cooperative behaviors, animals are often given tasks that require pairs of animals to coordinate their actions in order to receive a reward. This paper reports the results of an aquatic version of one such task: cooperative rope-pulling. Three groups of captive bottlenose dolphins (Tursiops truncatus) were given an apparatus that could most easily be opened by the two animals working together. Two untrained adult males at one location were successful in opening the apparatus together, sharing …

A Comparison Of Habitat And Geomorphic Changes On East Ship Versus Sand Islands Mississippi, 2007-2014, Carlton Peter Anderson

Master's Theses

ABSTRACT

A COMPARISON OF HABITAT AND GEOMORPHIC CHANGES ON EAST SHIP VERSUS SAND ISLANDS MISSISSIPPI, 2007-2014

by Carlton Peter Anderson

May 2015

The islands of the Mississippi-Alabama (MS-AL) barrier island chain along the micro-tidal northern Gulf of Mexico are highly dynamic coastal features subject to rapid changes in habitat, geomorphology, and elevation by natural and anthropogenic disturbances, such as hurricanes, subsidence, sea-level rise, and dredging activities. The purpose of this study was to compare elevation, total volume, habitat-type coverage, and short-term change between “naturally” formed East Ship Island and “man-made” Sand Island (Disposal-Area 10). This study used a combination of …

Excerpts From Television's Greatest Hits And Other Stories, Zachary Stephen Williams

Master's Theses

The short stories contained in this manuscript are mostly of the realist stripe, with a few concessions made to my more fabulist tendencies. Each is about men and women being forced to relive their old lives or finding themselves at the cusp of new ones, propositions which prove simultaneously attractive and repulsive. By the end of each story, it is my hope to transmit that the characters have survived somewhat intact, though reconstituted. There is a man in grief over the death of the wife he couldn’t stop cheating on, adults trick-or-treating at the expense of their children’s youths, a …

Seasonal Variation In Corticosterone, Stress Responses, And Physiology In The Northern Cardinal Cardinalis Cardinalis, Benjamin Matthew Duckworth

Master's Theses

Seasonal regulation of the adrenocortical response (e.g., ‘stress response’) appears to be ubiquitous in mid- to high-latitude vertebrates. Northern Cardinals (Cardinalis cardinalis) are a Temperate dwelling passerine of Tropical-descent with a wide species range (tropics to Northern Temperate zones). This species encounters a wide variety of environmental conditions and strong seasonality, however corticosterone (CORT, the main adrenal stress hormone) has not been studied with regards to changes in seasonal levels. I initially analyzed samples from cardinals collected between 2007-2011 from the Lake Thoreau Environmental Research and Educational Center (Hattiesburg, Mississippi, USA). The data suggested seasonal differences of CORT, with higher …

Effects Of Pre-Release Physical Stressors On Post-Release Success Of Hatchery-Reared Spotted Seatrout, Taylor Westbrook Guest

Master's Theses

Alteration of habitat associated with coastal development and increased demand for food and recreation can result in the depletion of fisheries resources such as the Spotted Seatrout (Cynoscion nebulosus), the Gulf of Mexico’s most popular recreational fish. Stock enhancement, or the release of cultured fish to supplement wild populations, is one potential tool for managing important fisheries resources. Although much effort has gone into marine stock enhancement, the effectiveness of stocking is not well established, and techniques for ensuring success have not been developed. Although the basic biology of the Spotted Seatrout is well known, comparatively little is known about …

Eight Degree Of Freedom Vehicle Model With Pitch, Yaw, Tire Control And Sensor Inputs, Sean T. Hirtle

Master's Theses

This research focuses on the development of an eight degree of freedom vehicle model in the MATLAB computing language. Its purpose is to provide flexibility in the modeling and implementation of signal inputs and crash avoidance logic while maintaining accuracy in the physics of the vehicle’s motion. Firstly, the equations of motion for the bodies involved under a reasonable set of assumptions were developed. Next the model was translated to computer code. By writing the model in SimuLink with *.m files, the modularity of the code is enhanced. To validate the model, several well defined tests were simulated.

To establish …

Challenges In Transitioning From Waterfall To Scrum, Rini Iyju

Master's Theses

In today's fast-paced, fiercely competitive world; speed and flexibility are essential. Companies are increasingly realizing that the sequential approach to developing new product simply will not get the job done.

The goal of this thesis is to investigate critical issues and challenges that occur during the transition from a traditional software development methodology such as Waterfall to Scrum. During the last decade, Scrum has gained a vast success in software development due to its lightweight character and efficient way of handling the challenges of increased market speed, change and product complexity.

This thesis is based on a sequential exploratory mixed …

Deciphering The Functional Collaboration Of Mid And Bric-A-Brac 2 As Potential Regulators Of Cellular Proliferation Within Adult Drosophila Ovaries, Petra Visic

Master's Theses

Stem cell niches are highly organized and specialized microenvironments located within specific tissues of both vertebrate and invertebrate organisms [1]. In Drosophila melanogaster, three distinct stem cell niches have been identified within the ovary including the germline stem cell (GSC), follicle stem cell (FSC), and escort stem cell (ESC) niche. Recently, Fregoso-Lomas et al. [2] reported that Gurken/Epidermal Growth Factor Receptor (EGFR) signaling is modulated within posterior ovarian follicle cells by Midline (Mid). The mid gene encodes a T-box transcription factor protein that specifies cell fates in the developing heart [3][4], central nervous system [5][6], epidermis [7], and eye …

Exploring Sexual Differentiation In The Tammar Wallaby Using Transcriptomics, Jenny Y. Kwok

Master's Theses

Sex determination and sexual differentiation are some of the most well studied topics in human development. Sex determination is the point where the undifferentiated gonad becomes committed to the ovarian or testicular pathway. This event can be triggered genetically or environmentally. Sexual differentiation occurs after sexual determination and involves the maturation of the gonad, which in turn, coordinates the corresponding physical and behavioral phenotypes. Disorders of sexual development (DSD) are among the most common congenital abnormalities seen in humans and are increasing at an alarming rate. Congenital DSDs can be caused by genetic, hormonal, and/or environmental stimuli. Increased exposure to …

Exploring The Physiological Role Of Vibrio Fischeri Pepn, Sally L. Cello

Master's Theses

The primary contributor to Vibrio fischeri aminopeptidase activity is aminopeptidase N, PepN. Colonization assays revealed the pepN mutant strain to be deficient at forming dense aggregates and populating the host’s light organ compared to wildtype within the first 12 hours of colonization; however the mutant competed normally at 24 hours. To address the role of PepN in colonization initiation and establish additional phenotypes for the pepN mutant strain, stress response and other physiological assays were employed. Marked differences were found between pepN mutant and wildtype strain in response to salinity, acidity, and antibiotic tolerance. This study has provided a foundation …

Evaluating Urban Design Strategies For Climate Change Adaptation In Los Angeles, Kerby Andrew Olsen

Master's Theses

Human interference with the Earth’s climate, through the release of greenhouse gasses (GHGs), is estimated to have already increased average statewide temperatures in California by 1.7° Fahrenheit (F), with a further 2.7°F of warming expected by mid-century. The negative impacts of increased temperatures may be especially acute in mid-latitude cities that currently enjoy a mild climate, such as Los Angeles (LA), which are projected to warm to a point that will significantly affect human health and well being. The built environment increases urban temperatures through building materials that readily absorb heat from the sun, a lack of vegetation, a lack …

A Generalized Logic-Based Approach For Intelligent Fault Detection And Recovery In Power Electronic Systems, Weiqiang Chen

Master's Theses

This thesis presents a generalized logic-based approach for intelligent fault diagnosis in power electronic converters based on correlation between faults and basic measurements. Fault recovery is then applied based on this correlation by using specific signals and quantities from existing measurements. The main purpose is for power electronic systems to cope with the notion of a smart grid and its different smart components. Existing intelligent control of power electronic systems is reviewed along with various short- and open-circuit faults in major power electronic components. Two methods are established to diagnose faults and engage redundancy for fault recovery with one method …

Theory Of Mind Without A Language Model: Effects Of Social Experience, Education And Language Exposure, Deanna L. Gagne

Master's Theses

Theory of Mind (ToM) abilities, i.e., the understanding that others’ internal states differ from one’s own, and that these states guide behavior, are multiply determined. ToM abilities underlie later social and pragmatic abilities, grossly affecting later life experiences, particularly for deaf children. However, previous studies have not clearly identified the effects of language, hearing status, or other exogenous factors, such as education or executive function abilities, on ToM development. To disentangle these, we studied three understudied populations in Nicaragua: Homesigners, who have not acquired a conventional language but have developed gestural communication systems; users of Nicaraguan Sign Language, an emerging …

Bicycle Tourism Plan For Economic Development: A Template For Rural Agricultural Towns And A Case Study For The City Of Winters, California, Marisa Rene Lee

Master's Theses

Bicycling is a method of tourism transportation that is healthy, non-invasive, environmentally responsible, and economically sustainable. It allows freedom, mobility, and sightseeing potential that is not made possible by other modes of transit. Thousands of bicycle tourists travel from all over the globe annually to explore California on touring bikes via established cycling routes and robust determination. Thousands of additional domestic and international visitors take weekend trips, plan family vacations, travel for business, or tour California from abroad, many of whom are excellent candidates for local and regional bicycle touring at a more gentle intensity level.

The increasing popularity and …

Increasing Expression Of Hepatitis B Surface Antigen In Maize Through Breeding, Erin Suzanne Miller

Master's Theses

The hepatitis B virus (HBV) is a common virus, with two billion people infected worldwide. It causes approximately 600,000 deaths each year, despite the availability of an effective vaccine since 1982. Maize as a platform for oral vaccination can supply a heat stable vaccine, which does not require syringes or trained personnel to administer. The Hepatitis B Surface antigen was transformed into maize and this seed was used to evaluate expression levels through the breeding process. The transgene was transferred into two elite maize inbreds by backcrossing. Highest expressing ears were selected each generation until approximately 99% commercial parent was …

Conservation Through Limited Development: An Approach For Land Conservancies, Catherine Joy Tarone

Master's Theses

The Land Conservancy of San Luis Obispo County is interested in determining the approach that it may take if it decides to pursue conservation and limited development as a strategy to preserve land. In using conservation and limited development, the Conservancy may put into practice its core values by employing this intensely-collaborative conservation tool and informing itself about development, conservation, collaboration and financing, in order to meet multiple community needs.

Information about the limited development process was collected from books, news articles and personal communications with professionals to determine its components. Each chapter of this report analyzes one component, putting …

A Wearable 1.6ghz Non-Invasive Midfield Wave-Based Blood Glucose Sensor, Danielle Nishida

Master's Theses

A non-invasive glucose sensor has been sought after by millions of Americans living with diabetes and scientists alike. Current blood glucose sensors approved by the FDA involve an invasive collection technique coupled with costly chemical analysis materials, which continue to bring pain to the growing diabetic population in America. Previous research of non-invasive sensing methods has shown promise, but the difficulty of transmitting power through tissue has degraded the sensing consistency and accuracy needed to reach the consumer market. This has been overcome with recent research in midfield wave power transmission at Stanford University, which has provided an opportunity for …

Native Small Mammal Use Of An Invasive Grass: Heermann's Kangaroo Rats (Dipodomys Heermanni) And Veldt Grass (Ehrharta Calycina) In Coastal California, Juliana P. Trunzo

Master's Theses

Invasive species are generally regarded as detrimental to native communities because they cause increased competition and community structure alterations. There is therefore a critical need to understand the ecological processes underlying the establishment and spread of invasive species. While most studies to date have focused on the role of competition in species invasions, trophic dynamics may also play a fundamental role in the establishment and spread of non-natives, especially in cases when a non-native species experiences differential predation pressure relative to a native competitor. Herein I explore the potential for differential granivory pressure by a native rodent (Heermann’s kangaroo rat, …

Comparison Of Regular Ringer's Solution And Glucose Ringer's Solution On The Longevity Of The Hirudo Medicinalis' Retzius Cell, Nicole Arielle Peretti

Master's Theses

In 1882, Sydney Ringer, a professor of medicine at University College in London, experimented with the frog ventricle to better understand how each constituent of blood influences contraction. The ultimate goal was to create an artificial circulating fluid to use for the perfusion of isolated organs, in this case, a frog heart. Today, Ringer’s solution is still used in research for physiological studies requiring the survival and maintenance of specimens outside of their host bodies. One such example is the use of medicinal leech ganglia for electrophysiological measurements. In this thesis, I am comparing two Ringer’s solutions, original versus added …

Passive Tick Surveillance For Ixodes Scapularis And The Incidence Of Lyme Disease In Connecticut, Tsa J. Shelton

Master's Theses

Lyme disease is a tick-borne disease, transmitted to humans via the bite of an Ixodes scapularis tick infected with the spirochetal bacterium Borrelia burgdorferi. This disease is endemic in Connecticut and has been increasing in prevalence throughout New England for the past 30 years. Data collected from I. scapularis ticks submitted by the public to the Connecticut Agricultural Experiment Station and the Connecticut Veterinary Medical Diagnostic Laboratory for B. burgdorferi testing from 2002 to 2012 were compared with Lyme disease case data from the Connecticut Department of Public Health to determine the capacity at which passive tick surveillance can …