Digital Commons Network^™

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 …

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 …

Are People Reading Local News? A Content Analysis Of Popular News Stories On Nine Newspaper Websites, Peter Shiang Chen

Master's Theses

The news industry has come under tremendous pressure in the last decade. None more so than the newspaper industry, which has seen all aspects of its operation: readership, revenue, staff, distribution and reputation decline dramatically. This study uses content analysis to examine the reading habits of news consumers from nine newspaper-based websites from the Advance Publishing chain. The samples were the stories in the “most popular this hour” list, examined every 5 days from August to September, 2014. These stories were separated into categories such as news, sports, business, etc., and further coded based on their proximity to the news …

A Study On Photodegradation And The Fate Of Pyrogenic Carbon, John Thomas Howell

Master's Theses

Accounting for all possible sources of atmospheric CO₂ is a pressing issue today due to the increasing effects of climate change. Estimates suggested that on the order of 1.3 million tons of dissolved pyrogenic carbon (pyDOC) could be entering the northern Gulf of Mexico annually. Assessing the fate of pyDOC in aquatic systems is crucial to understanding ecosystem impacts and potential feedback to climate change. Current research indicates that despite a generally lower susceptibility to biodegradation than their unpyrolyzed equivalents, pyrogenic carbon is not environmentally inert. While the role of microorganisms on the fate and transformation …

Geographical Analysis Of Hub City Transit, Joshua Adam Watts

Master's Theses

This study assess Hub City Transit, the public bus system of Hattiesburg, MS. Statistical analysis is used to determine how well the transit system serves low income areas of the city. A 0.5 mile buffer was applied to the bus routes to determine the coverage of the transit system. Areas of disorder along the routes were also assessed to analyze the landscape routes pass through. Lastly, an analysis of ridership on each route was performed to determine the most heavily used areas, as well as to assess where riders are going on each route.

The findings show that Hub City …

Marine Snow Settling Velocities At An Oil Spill Site And A Control Site In The Northern Gulf Of Mexico, Clayton Hugh Dike

Master's Theses

After budgeting for response efforts and natural processes, over one million barrels of oil from the BP oil spill were unaccounted for. A hypothesis coined "The Dirty Blizzard" formed subsequent to observations of large and numerous oiled marine snow aggregates amidst the surface slick proposed that a large quantity of oil sank to depth via the aggregates. Having reached the seafloor, aggregates were subject to microbial degradation and to redistribution due to bottom currents. To assist in characterizing redistribution of particles near the seafloor, sediment traps, marine snow cameras, and acoustic Doppler current profilers (ADCPs) were deployed at two sites …

The Use Of Technology In Secondary Mathematics Classrooms: The Case Of One School District, Cononiah Latrece Watson

Master's Theses

Integration of technology into secondary education mathematics classes has been shown to increase student motivation and performance. In order for technology to be a component of students’ education, teachers must have training on various technologies available for their subjects of study. This research study surveys thirty-one 6-12^th grade teachers in the Lamar County School District in southern Mississippi regarding availability of technologies, use of technologies, and professional development needs concerning technology use.

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 …

Optimizing The Pistachio Supply Chain And Logistics Network For Fresno County Using Geographic Information Systems Network Analysis Method, Farnaz Daneshpour

Master's Theses

ABSTRACT

Optimizing the Pistachio Supply Chain and Logistics Network for Fresno County Using Geographic Information Systems Network Analysis Method

Farnaz Daneshpour

This study aims to optimize the transportation of pistachios from orchards to processing centers in Fresno County, California to improve logistics efficiency and reduce environmental impacts. This study evaluates the current transportation situation and compared it with the case in which a new processing center is built. Also, this study evaluates transportation efficiency based on calculations of total driving distance, driving time, fuel cost, and Co2 emission and assesses how much of these variables will be saved if a …

Detecting Learning Styles In Video Games, Benjamin Cooley

Master's Theses

Video games are increasingly becoming more intelligent, able to adapt themselves to the individual gamer. Learning styles are a set of models used to categorize people into different types of learners to explain why some people learn better through different methods. Since learning and exploration are such fundamental parts of the video game experience, it is interesting to consider the possibility of applying these learning style models to video games, allowing the video game to adapt to its player, providing a better experience. To consider such adaptation, the game must first be able to detect that learning style from how …

Optimizing Harris Corner Detection On Gpgpus Using Cuda, Justin Loundagin

Master's Theses

ABSTRACT

Optimizing Harris Corner Detection on GPGPUs Using CUDA

The objective of this thesis is to optimize the Harris corner detection algorithm implementation on NVIDIA GPGPUs using the CUDA software platform and measure the performance benefit. The Harris corner detection algorithm—developed by C. Harris and M. Stephens—discovers well defined corner points within an image. The corner detection implementation has been proven to be computationally intensive, thus realtime performance is difficult with a sequential software implementation. This thesis decomposes the Harris corner detection algorithm into a set of parallel stages, each of which are implemented and optimized on the CUDA platform. …

Combination Of A Probabilistic-Based And A Rule-Based Approach For Genealogical Record Linkage, Pooja P. Shah

Master's Theses

Record linkage is the task of identifying records within one or multiple databases that refer to the same entity. Currently, there exist many different approaches for record linkage. Some approaches incorporate the use of heuristic rules, mathematical models, Markov models, or machine learning. This thesis focuses on the application of record linkage to genealogical records within family trees. Today, large collections of genealogical records are stored in databases, which may contain multiple records that refer to a single individual. Resolving duplicate genealogical records can extend our knowledge on who has lived and more complete information can be constructed by combining …

A Three-Dimensional Anatomically Accurate Finite Element Model For Nerve Fiber Activation Simulation Coupling, Shain Ann Fischer

Master's Theses

Improved knowledge of human nerve function and recruitment would enable innovation in the Biomedical Engineering field. Better understanding holds the potential for greater integration between devices and the nervous system as well as the ability to develop therapeutic devices to treat conditions affecting the nervous system. This work presents a three-dimensional volume conductor model of the human arm for coupling with code describing nerve membrane characteristics. The model utilizes an inhomogeneous medium composed of bone, muscle, skin, nerve, artery, and vein. Dielectric properties of each tissue were collected from the literature and applied to corresponding material subdomains. Both a fully …

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 …

Design Methods For Remotely Powered Unmanned Aerial Vehicles, William Beaman Howe

Master's Theses

A method for sizing remotely powered unmanned aerial vehicles is presented to augment the conventional design process. This method allows for unconventionally powered aircraft to become options in trade studies during the initial design phase. A design matrix is created that shows where, and if, a remotely powered vehicle fits within the design space. For given range and power requirements, the design matrix uses historical data to determine whether an internal combustion or electrical system would be most appropriate. Trends in the historical data show that the break in the design space between the two systems is around 30 miles …

Predicting Flood Severity For New England Basins With A Semi-Distributed Hydrologic Model, Eric W. Buckley

Master's Theses

In an effort to modernize the state of practice of flash flood forecasting, recent research has shown promise in utilizing regionalized, continuous, distributed hydrologic models. Additional avenues of refining the forecasting methods have included attempting to forecast event frequencies in lieu of relying on flood magnitudes generated by the models. It is anticipated that this additional post processing of the distributed modeling results can alleviate some modeling errors inherent with trying to represent any natural process. This study examines the application of a regional distributed hydrologic model of lower New England, specifically the results calculated at internal sub-basins by comparing …

Methods And Observations For The Influence Of Temperature On Volatile Loss From Wine Fermentation, David Martin Goldfarb

Master's Theses

Background and Aims: Volatile loss of carbon dioxide, ethanol, esters and other compounds occurs during wine fermentation. When collected nondestructively, valuable ethanol and aroma compounds can be preserved for various uses while mitigating production restrictions and regulations regarding volatile organic compound (VOC) loss from wine production. Knowledge of the volume of volatiles lost during wine fermentation contributes to a better understanding of the magnitude of possibilities for resource recovery/aroma recovery, the implications of volatile loss on wine composition as well as a more clear understanding of the possible effect of alcoholic fermentation on air quality. The aim of this study …

Modeling The Effects Of Vertically Variable Soil Parameters And Hillslope Shape On Runoff, Benjamin L. Smith

Master's Theses

Soil parameters used in hydrologic modeling, such as porosity, volumetric water content, and saturated hydraulic conductivity (K_sat) are commonly known to be variable over depth within the soil profile, however these parameters are often modeled as single values, constant over depth. Also, hillslopes found in glacial till features of Connecticut tend to have an S-shaped profile over distance. This study proposes that using variably vertical soil parameters and hillslope shape has effects on runoff modeling results. The effects of vertical soil heterogeneity and hillslope shape on runoff production are evaluated by comparing soil water drainage and runoff …

Indoor Location Tracking And Orientation Estimation Using A Particle Filter, Ins, And Rssi, Cameron Ramin Nouri

Master's Theses

With the advent of wireless sensor technologies becoming more and more common-place in wearable devices and smartphones, indoor localization is becoming a heavily researched topic. One such application for this topic is in the medical field where wireless sensor devices that are capable of monitoring patient vitals and giving accurate location estimations allow for a less intrusive environment for nursing home patients.

This project explores the usage of using received signal strength indication (RSSI) in conjunction with an inertial navigation system (INS) to provide location estimations without the use of GPS in a Particle Filter with a small development microcontroller …

The Television Viewing, Dating, And Academics Of Young Adults, Michael D. Milmine

Master's Theses

Purpose of the Study

More than ever before, young adults have access to television content. Television programs are no longer relegated to the television set, but can be accessed on desktops, laptops, tablets, and even smartphones. The accessibility of television has increasingly allowed young adults to spend a significant portion of their day viewing these programs. Gathering information on how this viewing is related to their dating and academic habits is important to better understand the decision-making and outcomes for young adults in these two central areas of their lives. The purpose of this study was to measure the relationship …

Ranking Interesting Changes In Correlation Coefficient Matrix Results From Varying Data Partitions In Causal Graphic Modeling, Yesica Daniela Bravo Gonzalez

Master's Theses

Problem

In life we need to compare situations in order to select the best solution. The study in this paper is about analyzing data (variables), which is also called data mining. There are situations where it is not enough to compare variables among themselves at one specific moment. Sometimes it is necessary to compare the behavior of variables at different periods of time and know how they behave at different times in order to select the best arrangements for any situation.

Method

To find correlation among variables, traffic intersections were simulated so they could be compared, since the correlation coefficient …

Multi-Directional Warning Message Dissemination Protocol Based On Motion Vector Clustering For Vanets, Hung-Chou Wang

Master's Theses

Problem. Most broadcast suppression protocols in vehicular ad hoc networks (VANET) mainly focus on one-dimensional message dissemination model for both highway and urban scenarios. Due to the non-line-of-sight (NLOS) problem occuring frequently in urban scenario, protocols mostly rely on either infrastructure or the vehicle that is passing through the intersection to forward the message in multiple directions manner. However, these one-dimensional message dissemination models fail to take into account realistic road topologies and traffic distribution. As a result, they tend to miss some possible dissemination directions.

Method. Vehicles travelling on the same road share similar motion pattern due to the …

A Mathematical Framework Of Human Thought Process: Rectifying Software Construction Inefficiency And Identifying Characteristic Efficiencies Of Networked Systems Via Problem-Solution Cycle, Jonathan Sarbah-Yalley

Master's Theses

Problem

The lack of a theory to explain human thought process latently affects the general perception of problem solving activities. This present study was to theorize human thought process (HTP) to ascertain in general the effect of problem solving inadequacy on efficiency.

Method

To theorize human thought process (HTP), basic human problem solving activities were investigated through the vein of problem-solution cycle (PSC). The scope of PSC investigation was focused on the inefficiency problem in software construction and latent characteristic efficiencies of a similar networked system. In order to analyze said PSC activities, three mathematical quotients and a messaging wavefunction …

A Comparison Of Secondary Dropout Rates In Rural And Urban Costa Rica, Mary Flynn Doran

Master's Theses

This study examined the issue of secondary school abandonment in Costa Rica. It took the national percentage of dropouts as well as the evident problem of regional disparities in terms of high school completion into consideration while it analyzed the opinions of high school aged students in both a rural and urban area. There were four participant groups in total, two in each location. The groups consisted of 5 enrolled and 5 previously enrolled subjects in both areas and each participant was asked open ended questions about their education, future, opinion on high school in general, and attitudes in regards …

The Influence Of Community-Based Summer Programs On Ethnically Diverse, Low-Income Chicago Youth, Amy Governale

Master's Theses

How youth spend their time has become an increasingly important factor in studying adolescent development. During the summer months, longer periods of unsupervised time have been associated with a loss of academic skills and lower social-emotional skills. One support for at-risk youth and adolescents might be summer programs housed in community-based organizations. Using a pre-post test design over an 11-week period, the present study examines the linkages among participation in summer programs, individual characteristics, and youth outcomes among ethnically diverse, low-income Chicago youth. Analyses revealed ethnicity was related to math skills at the end of the summer, although the strongest …

Wide As The Waters: Comparing Student Performance In Alabama And Florida From 1992-2011, Kellie Slappey Nothstine

Master's Theses

The school choice movement has been making significant traction within the United States in the last decade and a record number of states have implemented school choice programs that introduce competition to the traditional public schools and treat education like a market. The marketization of education and making traditional public school truly compete against alternative schooling options is more often discussed in theory but in reality is infrequently applied on a large scale. In an attempt to truly gauge the advantages, disadvantages, and real life application of what can result when market forces are applied to a state’s education system …

Autonomy Support, Elaborativeness, And Problem Solving During Families’ Building Construction In A Children’S Museum, Tayler Grashel

Master's Theses

The current study aimed to promote parent-child interactions that could foster children's early STEM learning. Specifically, the current study focuses on four dimensions of family interactions that have been found in prior work to support children's learning and development: problem solving, parents’ and children’s elaborative talk, and parental autonomy support. This study examined how levels of support on each of these dimensions related to children's abilities to build and fix skyscrapers made out of plastic building materials in the Skyline exhibit at the Chicago Children's Museum. The participants were 74 families with 4- to 8- year old children (M = …

Malaria Transmission Blocking Vaccines, Lukasz Jacek Sewera

Master's Theses

Malaria affects 198 million people and kills 584,000 each year, predominantly in Sub-Saharan Africa (WHO). The most severe form of malaria is caused by the protozoan parasite Plasmodium falciparum. Development of a vaccine against P. falciparum has been hindered by its complex life cycle with multiple antigenically distinct human and mosquito stages. To effectively prevent disease and reduce the parasite burden in populations, a vaccine will need to target multiple stages, including blocking transmission at the mosquito stage.

Antibodies generated against P. falciparum mosquito stage antigen Pfs25 can prevent parasite transmission from humans to mosquitoes. However, Pfs25 is poorly immunogenic …

The Influence Of Eastern Oyster (Crassostrea Virginica) Reef Restoration On Nitrogen Cycling In A Eutrophic Estuary., Michael Hassett

Master's Theses

Oysters (Crassostrea virginica) are functionally extinct in the urbanized Hudson-Raritan estuary (HRE) in New York City, however, oyster restoration is promoted to mitigate nitrogen (N) pollution via oysters' filtration and excretion. Seasonally, I took 12 sediment cores (45 cm2) adjacent to and 10 m away from a recently constructed reef in the HRE. Cores were incubated in flow-through chambers with site water containing (1) no amendments, (2) 15N-ammonium, or (3) 15N-nitrate, from which I calculated coupled nitrification-denitrification and direct denitrification as isotope-enriched N2. Coupled denitrification was minimal at all sites while direct denitrification was elevated near the reef, suggesting organic …

An Examination Of The Mass Limit For Stability At The Triangular Lagrange Points For A Three-Body System And A Special Case Of The Four-Body Problem, Sean Kemp

Master's Theses

While the three-body problem has been without an exact analytical solution for some 400 odd years, we have learned a great deal about the dynamics of three-body systems in that time. There are five points relative to two massive bodies where a third body will remain in a stable orbit. These are called the Lagrange points. Two of these points, located at the vertices of equilateral triangles, are stable equilibria. We find clear evidence for these stable points within our own solar system, most notably Jupiter's Trojan satellites.

It may be possible to place a massive body at one of …