Digital Commons Network^™

A Depolymerization Based Model Of Neuron Growth Cone Shape And Motility, Neerajha Nagarajan

Master's Theses

Cell migration is a ubiquitous process underlying critical biological mechanisms like wound healing, cancer metastasis and even neuron growth cone motility. It is a critical process for the living organisms as it ensures proper functioning of the system, for example, crawling fibroblasts endure closure of wounds during wound healing. Here we focus our interest on neuron growth cones, a sensory and motile organelle present at the tip of extending neurites, like the axons, in neurons. These are responsible for neuron pathfinding onto specific targets and synapses, in responses to various guidance cues. Interestingly, the motility of the growth cones is …

Weather-Based Damage Prediction Models For Electric Distribution Networks, David W. Wanik

Master's Theses

From thunderstorms to hurricanes, electric distribution networks are subject to a wide range of warm weather storm events. Tropical Storm Irene (2011) and Hurricane Sandy (2012) are two events in recent memory that disrupted over half of The Connecticut Light and Power Company’s (CL&P) service territory, which left some customers without power for up to eleven days. This research study investigates a damage prediction framework for both thunderstorms and hurricanes that combines two generalized linear models to probabilistically determine the occurrence and extent of damages, known as trouble spots, to the overhead power distribution network. The models are inputted with …

Ultra-Stable Protein-Polymer Bioconjugates, Kyle S. Cole

Master's Theses

No abstract provided.

Effects Of Neonatal Hypoxic Ischemic Brain Injury On Spatial Working Memory, Amanda L. Smith

Master's Theses

Children born prematurely or at very low birth weight (VLBW) have an increased risk for hypoxic ischemic brain injury (HI). HI refers to a lack of adequate blood and oxygen flow in the brain. HI can also occur in the term infant due to birth complications such as prolonged labor, placental dysfunction, or cord prolapse. In both populations (though exact patterns of neuropathology vary) brain damage is likely to occur in the form of decreased hippocampal and cortical volume, and enlargement of the ventricles (Kesler et al., 2004, Nagy et al., 2009). Resulting neuropathology can in turn lead to cognitive …

Investigation Of In-Situ Immobilization Of Contaminated Sediments Using Alginate Gels For The Reduction Of Ecological Risk, Michael V. Podany Mr.

Master's Theses

Remediation methods for contaminated sediments include dredging, treatment and disposal and sediment isolation through capping. These methods are costly and adversely impact local ecosystems, in some cases causing major disturbances to the sediment bed and water column. A new remediation technique is proposed for slowly biodegradable contaminants using alginate hydrogels as a binding agent of sediment. The rational is that sediment particles bound in alginate hydrogel are less likely to be resuspended and the treatment is less disruptive than capping. Here we show addition of alginate increased the shear strength of sediment comprised of defined particle sizes. The increase in …

Role Of Tonic Protein Kinase A On Sk2 Channel Expression, Krithika Abiraman

Master's Theses

Small conductance calcium-activated potassium channels (SK) play a fundamental role in synaptic transmission, plasticity, learning and memory (Hammond, 2006; Faber, 2008; Lin et al., 2008) . A very recent study successfully combined single molecule atomic force microscopy (AFM) and toxin pharmacology to quantitatively map SK channels in living neurons (Maciaszek et al., 2012). In addition to localizing native SK channels, this study also showed that SK channel distribution is dynamic with a decrease in SK channel surface expression upon addition of forskolin (FSK), a protein kinase A (PKA) activator. This finding raised further questions about the mechanism through which FSK …

Detection Of Genomic Inversion From Single End Read, Pankaj Ghimire

Master's Theses

Structural Variations (SVs) are genomic rearrangements that include both copy-number variants,such as insertion,deletions, duplications and balanced variants like inversion and translocations. These SVs are getting more attentions for research and investigation because of their role on human phenotype, genetic diseases and genomic rearrangements. Evolution of Next-generation Sequencing has provided golden opportunities to investigate these variants and make their wider and clear spectrum in human genome. This investigation includes identification of type of SVs and their breakpoints at base pair level. For their effective identification and breakpoint resolution, many techniques are devised mainly based on paired end read. With relatively low …

Cultural Traditions And The Reproductive Health Of Somali Refugees And Immigrants, Nancy S. Deyo

Master's Theses

Millions of Somalis began fleeing their country in 1991 to escape the civil war. The largest Diaspora of Somali refugees in the United States currently reside in Minnesota. Utilizing a qualitative research approach, four focus groups with 25 Somali women, two focus groups with 12 Somali men, one focus group with Somali religious leaders and seven in-depth interviews with American healthcare professionals were conducted in Minneapolis to help develop culturally sensitive reproductive health programs for Somali mothers. Twenty key distinctions between Somali cultural traditions and Western medicine were identified. For many Somali women, prenatal care is a new concept. There …

The Lavender Tide: Lgbtq Activism In Neoliberal Argentina, Andrew Shaffer

Master's Theses

Beginning with the legalization of same-sex marriage in 2010 and following up with the passage of the gender identity law of 2012, Argentina has quickly catapulted itself to the forefront of LGBTQ (lesbian, gay, bisexual, trans*, queer) rights in the world. This study sets out to answer a simple question: how did these vast legal changes come about in a country whose LGBTQ citizens are still met with hostility and discrimination? In order to answer this question I look at the ways LGBTQ activists have argued for the civil rights that they have achieved, and measure their success by analyzing …

The Globalization Of Cosmetic Surgery: Examining Bric And Beyond, Lauren E. Riggs

Master's Theses

What is driving the globalization of cosmetic surgery? Using BRIC (Brazil, Russia, India, China) countries as a model, this master's thesis systematically identifies and analyzes (1) the origins of cosmetic surgery in historical, regional, and country-specific terms, and (2) examples of how cosmetic surgery has become normalized. As a result, clear patterns emerge in regards to: embedded power structures related to racism and war; the results of Western interests rapidly opening countries’ markets to high media and corporate influence—especially in the wake of political oppression and austerity; the exacerbation of pre-existing class, color, race, and gender prejudice by hyper-consumerism; the …

Countering Youth Incarceration: Community Strategies In New Orleans And Cape Town, Ariel Marshall

Master's Theses

This research project looks at community-level remedial strategies addressing high youth incarceration and recidivism rates in the cities of Cape Town and New Orleans. Working within a theoretical framework of structural violence, I argue that the dominant discourse of Criminal Justice is based in punitive and retributive methodologies that have severe and long term implications for the psychological and social well being of detained youth, as well as the communities to which they return after imprisonment. My aim was to take a ‘bottom-up’ approach and examine the community-based projects in the two cities, which are developing counter-hegemonic knowledge and practices …

Oil, Power, And Discourse: How Chevron Evaded Its Dues To The Indigenous Communities Of The Ecuadorian Amazon, Kine Norland

Master's Theses

Abstract

The principal objectives of this thesis were to shed lights on the backside of oil and to question the great power of big corporations. I researched why Chevron refused to acknowledge its legal obligation to remedy the complex problems it has caused in the Ecuadorian Rainforest. The catastrophes the indigenous communities have been facing are about to change as a result of grass root mobilization against Chevron. By the use of observations, discourse analysis of the media, and the use of theories from Michel Foucault, I was able to explain how Chevron has managed to escape from the terrible …

Theta Dynamics: Speed, Acceleration And Contribution To Cognition, Lauren L. Long

Master's Theses

No abstract provided.

What’S In Your Cup: A Critique Of The Fair Trade System And Its Ability To Support Qualitative Socioeconomic And Environmental Transformation, Brittan M. Stockert

Master's Theses

No abstract provided.

The Flow Of Water, Power, And Ideas: Water Commodification In Cape Town, South Africa And The Stratified Experiences Of Time And Space Compression, Jenna Washburn

Master's Theses

I use the neoliberalization of the water sector in Cape Town, South Africa in order to test my theory of unequal development. I assert that the neoliberal economic practices of water commodification, business-friendly tariff policies, and prepaid management devices keep people along the periphery from accessing water, power, and ideas – thus causing a stratification of time and space compression between the core and the periphery.

By painting a theoretical picture of world cities, I wish to complicate the dominant views of time/space compression and suggest that, much like development and arguably because of it, time and space compression actually …

Quantum Dot Deposition Into Pdms And Application Onto A Solar Cell, Christopher Marcus Botros, Richard N. Savage

Master's Theses

Research to increase the efficiency of conventional solar cells is constantly underway. The goal of this work is to increase the efficiency of conventional solar cells by incorporating quantum dot (QD) nanoparticles in the absorption mechanism. The strategy is to have the QDs absorb UV and fluoresce photons in the visible region that are more readily absorbed by the cells. The outcome is that the cells have more visible photons to absorb and have increased power output. The QDs, having a CdSe core and a ZnS shell, were applied to the solar cells as follows. First, the QDs were synthesized …

Factors Influencing The Spatial And Temporal Distrubtion Of Primary Productivity And Community Respiration In The Mississippi Coastal Estuarine Region, Ryan Anthony Vandermeulen

Master's Theses

This study describes the spatial and temporal distribution of net primary productivity (NetPP) and respiration (RESP) in relation to the biogeochemical, optical, and hydrographic variability in the Mississippi Sound and Mississippi Bight over the course of one year. Surface in-situ measurements of NetPP and RESP were regularly determined at two stations by a time-course detection of dissolved oxygen (DO) using novel optode technology. In addition, various biogeochemical, optical, and hydrographic parameters were examined over 14 stations throughout the estuary over a year, using ground and satellite (MODIS Aqua) measurements. In this study, consistently low dissolved inorganic N:P ratios (average N:P …

Life History Of The Southern Kingfish, Menticirrhus Americanus, From The North-Central Gulf Of Mexico, Samuel Dee Clardy

Master's Theses

Southern kingfish, Menticirrhus americanus, is a common sciaenid along the north-central Gulf of Mexico (GOM), but annual harvest has declined over the last decade. Little is known about the life history of southern kingfish in the north-central GOM, and thus the objectives of this study are to establish the spawning season, spawning frequency, fecundity, sex ratio, female size at 50% maturity, age, and standard morphometrics. Specimens were collected using hook and line in several locations within the Mississippi Sound. A total of 519 southern kingfish (434 females, 85 males) were captured from April 2008 through May 2009 by hook …

Marginalization Of Mothers In The Market: A Comparative Study Of The Limits And Opportunities For Public Policy, Jennifer Mary Crosslin

Master's Theses

Despite significant gains of women living in advanced democracies over the last several decades, sex inequality in the market still exists. Women still earn less, work less, and are less likely to be found in top leadership positions in the market, especially mothers, but disparity between men and women in terms of these outcomes varies among many countries. This study explores the relationship between government policies and the market outcomes of women in the United States and other European nations to determine if the different policies explain the variances, and consequently the necessity of state intervention for achieving gender equality. …

An Analysis Of Human Disturbance To Rocky Intertidal Communities Of San Luis Obispo County, Grant Tyler Waltz

Master's Theses

ABSTRACT

An Analysis Of Human Disturbance To Rocky Intertidal Communities Of San Luis Obispo County

Grant Tyler Waltz

The number of coastal areas open to public access in California and San Luis Obispo County is increasing due to the acquisition by California State Parks of land previously owned by private entities. For example, California State Parks acquired property from the Hearst Corporation in 2005, which included 18 miles of coastline. California State Parks is responsible for providing public access in these newly acquired areas and also for maintaining the health of the natural systems found on these properties. Part of …

Measuring Impedance Of Tissues Using A Microfabricated Microelectrode Array, Ashwini Bhat

Master's Theses

MEASURING IMPEDANCE OF TISSUES USING A MICROFABRICATED MICROELECTRODE ARRAY By Ashwini Bhat

This thesis looks at the possibility of using impedance spectroscopy for differentiating tissue, using a microelectrode array (MEA). The thesis first discusses the background and the motivation for this thesis. It covers the certain basic concepts of the human skin starting from the top epidermis layer all the way to the deep dermis layers of the skin. Then it discusses different types of skin cancer and how they occur, in humans. It also discusses various microfabrication techniques such as oxidation, wet etching, sputtering and photolithography for the creation …

Analysis Of Microsatellites From Sclerocactus Glaucus And Sclerocactus Parviflorus To Assess Hybridization Levels And Genetic Diversity, Anna Louise Schwabe

Master's Theses

Sclerocactus glaucus is an endemic Colorado species that is federally threatened under the Endangered Species Act. Sclerocactus glaucus is losing habitat due to disturbance by oil and gas exploration, urbanization, open range cattle grazing and recreational land use. Due to the low number of wild populations, conservationists question the genetic integrity of the species. Field biologists have observed S. glaucus populations with individuals possessing morphological characteristics of the closely related and widely distributed Sclerocactus parviflorus. Individuals from 28 populations of S. glaucus, 9 populations of S. parviflorus, and 1 population of S. cloveriae were sampled. Microsatellite analysis using 13 variable …

Identifying And Characterizing Non-Coding Rnas In The Dinoflagellate Karenia Brevis, Helen Namataka

Master's Theses

When algal cells proliferate and accumulate in marine and fresh water systems, they form algal blo'oms. The majority of these blooms are beneficial, but a significant number are detrimental and are known as harmful algal blooms (HABs). A number of negative effects, including closing of recreational beaches and economic loss, are observed during HABs. Predictably, the longer a bloom persists, the greater its effects on human, environmental and economic health. Karenia brevis, a mixotrophic dinoflagellate, forms HABs, and blooms caused by this organism have been known to remain several months after formation. For these reasons, research has been conducted to …

Fungal Biofilm Colonization And Succession On Artificial Reefs In The North-Central Gulf Of Mexico, Amy Leigh Salamone

Master's Theses

This study represents the first characterization of natural mixed-species fungal biofilm communities on artificial reefs in the marine environment. Previous fungal biofilm studies have failed to observe the naturally-occurring biodiversity in coastal areas, which comprise the most utilized zone of the marine environment. Artificial reefs can increase fishing yields, amplify oyster habitats, contribute to shoreline stabilization, promote good water quality, and deter pollution. Proper management practices of artificial reefs require knowledge of the colonization of these new habitats by marine organisms and their subsequent succession. Fungi, along with bacteria, archaea, protists, algae, and diatoms, quickly form a complex biofilm on …

Spatial And Temporal Variability Of Particulate And Chromophoric Dissolved Organic Matter Absorption In The Northern Gulf Of Mexico, Ashley Ann Lojek

Master's Theses

Coastal regions influenced by large freshwater inputs exhibit large variability in absorption and associated optical properties. Therefore, understanding coastal ecosystem processes requires intensive, ongoing sampling. Analysis of the Mississippi and Atchafalaya River plumes took place on board the RIV Pelican on two separate cruises. MagMix-1 occurred from May 1 to May 8, 2008 and corresponded to the highest discharge periods for both rivers for 2008; MagMix-11 took place October 31 to November 6, 2008 and corresponded to the lowest discharge periods for both rivers for 2008. Samples were collected along four transects in the northern Gulf of Mexico and were …

Carbon And Nitrogen Dynamics In High Intensity Minimal Exchange Shrimp (Litopenaeus Vannamei) Raceways, John Henry Francis

Master's Theses

Three separate shrimp (litopenaeus vannamei) growouts were examined at The University of Southern Mississippi's Thad Cochran Marine Aquaculture Center. The objectives of this project were to (1) determine if there was a significant difference in any water quality parameters between the 2 density treatments, (2) construct carbon and nitrogen budgets to see where the carbon and nitrogen went in the system for all growouts, (3) determine if plastic media had any effects on water quality parameters and shrimp production, (4) determine if plastic media allowed for a nitrifying bacteria population to establish more rapidly, (5) determine if the …

Controlling Nanoparticle Dispersion For Nanoscopic Self-Assembly, Nathan S. Starkweather

Master's Theses

Nanotechnology is the manipulation of matter and devices on the nanometer scale. Below the critical dimension length of 100nm, materials begin to display vastly different properties than their macro- or micro- scale counterparts. The exotic properties of nanomaterials may trigger the start of a new technological revolution, similar to the electronics revolution of the late 20^th century. Current applications of nanotechnology primarily make use of nanoparticles in bulk, often being made into composites or mixtures. While these materials have fantastic properties, organization of nano and microstructures of nanoparticles may allow the development of novel devices with many unique properties. …

Effects Of Silvicultural Management On Coast Redwood Forest Composition, Density And Structure In Santa Cruz And San Mateo Counties, Michael J. Papa

Master's Theses

The multiple-objective exploratory study investigates effects of various silvicultural management regimes commonly applied to coast redwood (Sequoia sempervirens [D. Don] Endl.) forests in Santa Cruz and San Mateo Counties, California, USA. A temporary forest inventory was installed in 24 harvest origin stands and 4 natural origin stands throughout the study area (sample area = 1189 acres). Data from the systematic sample of 233 one-quarter acre nested cluster plots (sample intensity = 4.9%) rendered overall forest descriptions in terms of species composition, density, and structure. The common forestry measures of trees per acre (TPA), basal area per acre (BA), and …

Activation Of Alcohols Toward Nucleophilic Substitution: Conversion Of Alcohols To Alkyl Halides, Amani Atiyalla Abdugadar

Master's Theses

The conversion of alcohols into alkyl halides is one of the most important reactions in organic chemistry. Development of new methodology is still desirable in academic research. Unfortunately, the hydroxyl group of the alcohol is relatively difficult to replace under normal conditions. That necessitates the conversion of alcohols to a more activated functionality before nucleophilic substitution becomes viable. Under vigorous conditions, the replacement is straightforward. Procedures for the generation of halides from alcohols have been extensively examined, e.g., using HX or Mitsunobu inversion. However, these methods require time, strong acid, or catalysis to proceed. These classical methods suffer from issues …

The Effects Of Growth Hormone On Primary Bovine Mammary Cell Models, Lisa Mcdonnell

Master's Theses

The ability of exogenous growth hormone (GH) to increase milk yield through insulin-like growth factor-1 (IGF-I) in dairy cows is well characterized. However, recent studies utilizing mammary epithelial cell lines indicate a direct effect of GH on mammary epithelial cells (MEC). To test if these observations are relevant in vivo and if this response differs between dairy breeds, three mammary models were utilized. Mammary explants from a lactating Jersey cow were cultured in classical lactogenic media (dexamethasone, insulin, and prolactin) with 0 or 10 ng/mL of recombinant bovine GH for 12h. Primary MEC from lactating Holstein and Jersey cows were …