Digital Commons Network^™

Adsorption/Desorption Process Of Stimuli-Responsive Polymers On Simulated Natural Surfaces Using Qcm-D & Afm Analysis, Yan Zong

Master's Theses

The stimuli-responsive adsorption of polyelectrolytes to biosurfaces provides an important vehicle for development of protective coatings, delivery of therapeutic agents, and cosmetic applications. Developing a fundamental understanding of the mechanisms and kinetics of adsorption/desorption processes of polymeric systems to biological surfaces is of critical importance in predicting performance and designing new formulations. This study describes quartz crystal microbalance and atomic force microscopy analysis of a poly(methyl vinyl ether-alt-maleic anhydride) copolymer (Gantrez® S97 BF) adsorption on dental mimicking surfaces to determine properties including thickness, morphology, viscoelasticy, and rate of adsorption/desorption of the polymer layer as a function of solution environment. A …

Friction Ridge Dysplasia And Its Preponderance In The Afghanistan Population, Chelsea Elyse Woullard

Master's Theses

Friction Ridge Dysplasia is a rare genetic disorder in which the friction skin ridge units do not fuse together to form continuously flowing friction ridges. The skin affected by Friction Ridge Dysplasia is generally localized to one area and gives a similar appearance of the pebbled state of skin on the snout of a dog. Many authors have briefly discussed Friction Ridge Dysplasia in their publications; however, in-depth reflection as to the cause and rate of occurrence of Friction Ridge Dysplasia has not been documented. The objective of this study is to determine whether or not Friction Ridge Dysplasia is …

Stimulant Use, Associated Psychopathology, And Eating Disordered Symptomatology, Tiffany Ann Hopkins

Master's Theses

The current study developed profiles of eating disorder, personality, and other psychopathological symptoms related to the use of central nervous system stimulants versus other types of drug use. Participants included 124 women in residential treatment for substance use with and without comorbid eating disorders. Symptomatology was measured by the Eating Disorders lnventory-3 (EDI-3), Millon Multiaxial Inventory-III (MCMI-III), and Personality Assessment Inventory (PAl). The current study utilized a series of six multivariate analyses of variance (MANOVAs) and discriminant analyses to determine patterns of psychopathology separating stimulant use from other drug use. Results indicated that women who used stimulants were primarily separated …

Legislated Landscape: A Comparison Of New Deal Farm Communities In Hattiesburg, Mccomb, And Tupelo, Mississippi, Joy Delaine Rhoads

Master's Theses

Government New Deal farm policies of the 1930s changed the realities of farming and the landscape in Mississippi. This research endeavors to compare three farm communities created by New Deal legislation in the state: Hattiesburg, McComb, and Tupelo. The economic crisis that was the Great Depression created a highly politicized environment as citizens looked to the government for economic relief. A crisis this severe would require an exceptional effort to mitigate the economic hardships it created, in varying degrees, for millions of Americans. The actions of the federal government during the Great Depression were an interesting mix of paternalism, desperation, …

Melancholia & Metaphor In Kazuo Ishiguro's The Remains Of The Day, Kristin Lasheaú Teston

Master's Theses

Critics widely acknowledge the psychological grounding of Kazuo Ishiguro's writing. His 1989 novel The Remains of the Day presents a central character deeply afflicted by his inability to acknowledge his condition. Both literal and figurative loss proliferates throughout the novel, and turning to Sigmund Freud's influential essay, "Mourning and Melancholia," allows us to understand how loss influences Stevens's narrative. In this essay, Freud explores conditions that result after the loss of person or an ideal. For Stevens, the lost object is the myth of pre-war English traditions. Freud's theories regarding melancholia provide a crucial insight to Stevens's inability to acknowledge …

Narratives By Six Year Old And Nine Year Old Boys: Brute: Institutional, And Non-Institutional Mental Facts, Adam Craig Whipple

Master's Theses

Brute facts, institutional facts, and non-institutional mental facts were studied. The philosophy of constructionism and the theory of intent provided a framework for this research. Intentionality provided the basis for social facts. Brute, institutional, and noninstitutional mental facts were operationally defined. This study analyzed the use of these facts in the narratives of 6-year-old boys and 9-year-old boys. There were a total of 19 participants in this research. This research established brute, institutional, and non-institutional mental facts as appropriate operational categories for studying children's narratives. The 6-year-old boys produced more brute facts than the 9-year-old boys. The 9-year-old boys produced …

Convergence Of Life History Phenotypes In Two Species Of Topminnows, Fundulus Notatus And Fundulus Olivaceus, Jared Aubin Harris

Master's Theses

Convergent evolution is the independent evolution of similar characteristics by means of natural selection. Convergence is a well-known phenomenon, but convergence resulting from equivalent environmental gradients has only been pursued in a few cases. The main purpose of this study was to look for evidence of convergence of life history traits between two sympatrically distributed topminnows. The two species typically separate along a stream size gradient with Fundulus notatus inhabiting the downstream environment, and F. olivaceus inhabiting the upstream headwater environment. However, there are at least three known drainages where the normal distribution pattern is reversed, and F. notatus is …

Sensitivity And Species Specificity Of Bisulfite Modification And Pyrosequencing Technology Used To Identify Tissue-Specific Dna Methylation Patterns In Common Biofluids Foudn In Crime Scenes, Sitara Christian Shirwani

Master's Theses

In order to convict the guilty or exonerate the innocent in criminal cases, it is crucial to reconstruct the crime scene and/or determine the nature of the crime. Identifying the different biofluids found at a crime scene can help shed light on these aspects of forensic casework. Recently, DNA methylation has been used as a means of identifying biological materials, as opposed to conventional protein/enzyme based methods. DNA methylation is the addition of a methyl group to the 5' carbon on a cytosine base (C), which is directly followed by a guanine base (G) and are called CpG sites. The …

Variations Of Vibrio Populations In Pacific White Shrimp, Litopenaeus Vannamei, Aquaculture Raceways, Tracy Rene Berutti

Master's Theses

Reducing incidence of vibrioses in intensive aquaculture systems is essential to maintaining yields. This study performed real-time qPCR (quantitative polymerase chain reaction) using primers targeting 16s rDNA sequences for total bacteria, the Vibrio genus, and Vibrio parahaemolyticus in aquaculture tanks over the growing season. Total DNA concentrations in each sample were measured with a NanoDrop 2000 Spectrophotometer (Thermo Scientific, Inc. USA). These data were compared to two levels of bio-floc solids removal in addition to physical and chemical tank parameters such as temperature, ammonia, nitrite, nitrate and phosphate. The total bacteria gene copy abundances were higher (p = 0.0081) …

Alcohol Consumption And Unwanted Sexual Experiences Among College Females: The Mediating Role Of Protective Behavioral Strategies, Kayla Darlene Moorer

Master's Theses

The narrowing gender gap regarding consumption has resulted in more alcoholrelated consequences specific to females. Compared to males, females report more sexual consequences, such as doing something they later regret, as a result of alcohol consumption. For this reason, there is a vital need for researchers to identify active methods that females can engage in while consuming alcohol in order to reduce the risk of unwanted sexual experiences (UWS). Protective behavioral strategies (PBS) have been shown to decrease overall alcohol-related consequences, but further investigation is needed to determine which strategies are most influential in reducing the occurrence of specific alcohol-related …

Age, Growth, Mortality, And The Effects Of Trawling On Mortality Of The Longspine Porgy, Stenotomus Caprinus, Cher Marie Newman

Master's Theses

Stenotomus caprinus (Longspine Porgy) is one of the most abundant bycatch species caught in trawl fisheries in the northern Gulf of Mexico (GOM). Biological data of length, weight, and abundance have been collected since 1972 on the Southeast Area Monitoring and Assessment Program (SEAMAP) surveys with a variety of GOM species, including Longspine Porgy, using trawl nets during groundfish surveys. In 2010-2011 five Longspine Porgy were obtained from Groundfish and Pelagic surveys at each station for further analysis. Age distribution was determined through von Bertalanffy length and weight-age models. The samples were separated into two regions of the GOM to …

Renewable Ocean Energy Site Selection Using A Gis: Gulf Coast Potential, Thomas Paul Wissing

Master's Theses

Development of offshore renewable wind energy for coastal states, counties and federally owned regions must account for numerous constraints and factors. In the northern Gulf of Mexico, decisions on developing sites for renewable wind energy have traditionally stemmed from environmental, socioeconomic, and political bases. Environmentally, new renewable off-shore projects cannot infringe on wetlands, marine sanctuaries, and fragile ecosystems (EFH). Placement of an offshore wind turbine should not significantly impact the surrounding environment. Taking into account maritime concerns, shipping lanes must not be impeded, and active military fly zones must be avoided.

Offshore projects must be financially self-sustaining for states and …

Influence Of Parenting Styles And Protective Behavioral Strategies On College Students' Alcohol Use And Alcohol-Related Consequences, Saarah Danielle Kison

Master's Theses

The current study examined the relationships between parenting styles, protective behavioral strategies (PBS), alcohol use and negative alcohol-related consequences in college students. While parenting styles have been associated with alcohol use, there are no studies which have investigated the relationship between parenting styles and negative alcohol-related consequences. Further, while alcohol use and negative consequences have been related to PBS, no studies have investigated the relationship between parenting styles and PBS. The current study hypothesized that PBS will be a partial mediator between parenting styles and alcohol use. The current study also hypothesized that PBS will be a partial mediator between …

Maladaptive Personality Traits And Sex Addiction Profiles, Jonathan Knute Jore

Master's Theses

How do pathological personality traits relate to specific expressions of compulsive sexual behaviors? Previous studies have concluded that there are only small relationships between these two constructs, but such studies have usually conceptualized sexual compulsion as a unidimensional construct. The current study used a correlational design to evaluate the relationship between pathological personality traits and six general domains of sexually compulsive behaviors and cognitions in an inpatient and outpatient clinical sample (N = 540) of males seeking treatment for sex addiction. The pathological personality trait results were assessed using the MMPI-2 Psychopathology Five (PSY-5) domain and facet traits. The sexually …

Loyalist Or Patriot: The Precarious Position Of Edmund Randolph, 1774-1786, Tanisha Jean Staten

Master's Theses

On May 29, 1787, Governor Edmund Randolph took the floor of the Constitutional Convention in Philadelphia with a radical plan for a new federal government. Randolph was a key member of the influential Virginia delegation which paved the way for United States' Constitutionalism. An examination of his early life, legal career, and politics offers a new lens with which to view the emergence of American constitutional ideology. Building off the work ofT.H. Breen, who argues that Virginia's landed gentry inhabited a distinct culture, this work illuminates the dynamics of these elites who were absolutely pivotal in shaping a new sense …

Assessing Respiration Rates And Nutrient Dynamics Of Aritifical Reef Biofilms And Bacterioplankton In The Mississippi Sound, Lynn Elizabeth Wilking

Master's Theses

Artificial reefs are primarily used to provide a suitable habitat for target fish populations, but the structures can also improve water quality and benefit non-target organisms. Laboratory incubation experiments were conducted in the presence of biofilm on rubble and in its absence to examine bacterial growth, community respiration, and nutrient dynamics at four artificial reef habitats in the Mississippi Sound. Biofilm samples were also collected from settlement plates deployed at each site and were analyzed for 813C and 81sN stable isotope content. Respiration rates were always higher in the presence of biofilm but bacterial abundance often declined over time, and …

Seasonal And Diurnal Behavioral Patterns Of Bottlenose Dolphins, Tursiops Truncatus, That Exhibit High Site And Low Site Fidelity To Mississippi Sound, Shauna Marisa Mcbride

Master's Theses

This study examined whether bottlenose dolphins (Tursiops truncatus) exhibit site fidelity to the Mississippi Sound and how the seasonal and diurnal behavioral patterns of dolphins that exhibit high site fidelity to the Mississippi Sound differ from those of dolphins with lower site fidelity. Opportunistic surveys conducted from July 2006 to April 2010 were analyzed. Statistical analyses consisted of nonparametric tests (Spearman's correlation, loglinear models, and Pearson's chi-square) to compare behavioral patterns of high site fidelity, mixed, and low site fidelity groups. Behavioral patterns significantly differed between site fidelity groups across seasons and diurnal periods. Feeding behavior was observed significantly more …

Synthesis And Study Of Stimuli-Responsive Fluorescent Polymeric Thin Films For Early Corrosion Detection By Directly Monitoring Iron Dissolution From Steel Substrates, Kevin William Harman

Master's Theses

The successful measurement and prediction of material lifetimes is of high importance for proper maintenance on metal infrastructures for prevention of asset loss through corrosive processes. Current testing protocols include mismatched accelerated weathering techniques in combination with visual corrosion detection that consume substantial amounts of time and resources and often lead to inaccurate extrapolation to natural conditions. For corrosion science and engineering to evolve further, accurate and early detection methods of efficiently evaluating materials are necessary. Fluorescence spectroscopy is one established non-destructive analytical technique that is highly sensitive and selective to a variety of metal ion species and chemical environments …

Anticipated Life Role Salience And Career Decision-Making Difficulties, Emily A. Schedin

Master's Theses

With the dual-earner population increasingly becoming the norm, undergraduate students are forced to consider the ways in which their career choice may affect their future family life, as well as how their family life may affect their career. Research has shown that undergraduate students may alter their vocational aspirations or adjust their future family plans to avoid work-family role conflict thus implying that students are making career decisions based on their prioritization of anticipated future life roles. The present study sought to investigate how the salience of different life roles may factor into the level of career decision-making difficulty (CDMD) …

Effects Of Waste Placement Practices On The Engineering Response Of Municipal Solid Waste, Jason Taylor Cox

Master's Theses

An extensive laboratory and field investigation was conducted at Santa Maria Regional Landfill (SMRL) in Santa Maria, CA to determine the effects of waste placement practices on the engineering response of municipal solid waste (MSW). Laboratory and field testing was used to determine the engineering properties and monitor field response of MSW.

The specific gravity (G_s) of manufactured MSW (MMSW), fresh MSW (FMSW), and old MSW (OMSW) was determined experimentally using a modified version of standard soil testing procedures. Effects of particle size, compactive effort, and degradation on the specific gravity of waste were evaluated. Specific gravity …

Numerical Flow Field Analysis Of An Air Augmented Rocket Using The Axisymmetric Method Of Characteristics, Jeffrey Massman

Master's Theses

An Axisymmetric Rocket Ejector Simulation (ARES) was developed to numerically analyze various configurations of an air augmented rocket. Primary and secondary flow field visualizations are presented and performance predictions are tabulated. A parametric study on ejector geometry is obtained following a validation of the flow fields and performance values.

The primary flow is calculated using a quasi-2D, irrotational Method of Characteristics and the secondary flow is found using isentropic relations. Primary calculations begin at the throat and extend through the nozzle to the location of the first Mach Disk. Combustion properties are tabulated before analysis to allow for propellant property …

Protective Effects Of Sphingomyelin Against Uv Photodamage In Human Keratinocytes, Kathleen De Guzman

Master's Theses

Ultraviolet (UV) radiation has been demonstrated in numerous studies to be a major risk factor for non-melanoma skin cancer development. Despite the emergence of current UV-preventative strategies, such as sunscreens and skin-protective clothing, the incidence of non-melanoma skin cancer has continued to rise. This has encouraged investigations on alternative methods for UV prevention. In particular, bovine milk sphingomyelin has been studied for its potential in protecting human skin against UV photodamage. While the previous studies have suggested that sphingomyelin exhibits UV-protective properties in a human skin equivalent model, the exact mechanisms behind sphingomyelin’s photoprotective effects are yet unknown.

This thesis …

Parsing Of Natural Language Requirements, Jamie L. Patterson

Master's Theses

The purpose of this thesis was to automate verification of the software requirements for an implantable cardioverter defibrillator with minimal manual rework. The requirements were written in plain English with only loose stylistic constraints. While full automation proved infeasible, many significant advances were made towards solving the problem, including a framework for storing requirements, a program which translates most of the natural language requirements into the framework, and a novel approach to parts of speech analysis.

In Perfect Xen, A Performance Study Of The Emerging Xen Scheduler, Ryan Hnarakis

Master's Theses

Fifty percent of Fortune 500 companies trust Xen, an open-source bare-metal hypervisor, to virtualize their websites and mission critical services in the cloud. Providing superior fault tolerance, scalability, and migration, virtualization allows these companies to run several isolated operating systems simultaneously on the same physical server. These isolated operating systems, called virtual machines, require a virtual traffic guard to cooperate with one another. This guard known as the Credit2 scheduler along with the newest Xen hypervisor was recently developed to supersede the older schedulers. Since wasted CPU cycles can be costly, the Credit2 prototype must undergo significant performance validation before …

Constant Voltage Hot-Wire Anemometry For The Boundary Layer Data System, Hon Yee Li

Master's Theses

To continue the development of the Boundary Layer Data System (BLDS), a constant voltage hot-wire anemometer (CVA) is implemented into the BLDS for flight-testing. The hot-wire anemometer was chosen as an alternative to the traditional pressure probe because of the ability to measure both average velocity and fluctuating velocity within the boundary layer. Previous work done on the benchtop has led to the design of miniaturization, flight-capable hardware for the BLDS. The next step in the development of the BLDS – CVA calls for quantifying the accuracy of the boundary layer measurements measured by the CVA system. To do this, …

Thermal Modeling And Validation Testing Of A Miniature Xenon Ion Thruster, Samuel R. Parker

Master's Theses

To support the research of miniature ion propulsion, Cal Poly's Miniature Xenon

Ion (MiXI) thruster has been modeled and tested. Using ANSYS Fluent, a two-

dimensional model of the transient thermal environment of MiXI-CP-V3 was

created. Validation testing was conducted in order to assess the accuracy of the

thermal model. During testing, temperature was measured at eight locations

across MiXI. From the test data it was determined that the thermal model did a

poor job of predicting temperature due to incident radiation at the four locations

nearest the keeper electrode. The four remaining locations were affected mostly

by conduction and …

Artist-Driven Fracturing Of Polyhedral Surface Meshes, Tyler Casella

Master's Theses

This paper presents a robust and artist driven method for fracturing a surface polyhedral mesh via fracture maps. A fracture map is an undirected simple graph with nodes representing positions in UV-space and fracture lines along the surface of a mesh. Fracture maps allow artists to concisely and rapidly define, edit, and apply fracture patterns onto the surface of their mesh.

The method projects a fracture map onto a polyhedral surface and splits its triangles accordingly. The polyhedral mesh is then segmented based on fracture lines to produce a set of independent surfaces called fracture components, containing the visible surface …

Adaptive Control Techniques For Transition-To-Hover Flight Of Fixed-Wing Uavs, Brian Decimo Marchini

Master's Theses

Fixed-wing unmanned aerial vehicles (UAVs) with the ability to hover combine the speed and endurance of traditional fixed-wing fight with the stable hovering and vertical takeoff and landing (VTOL) capabilities of helicopters and quadrotors. This combination of abilities can provide strategic advantages for UAV operators, especially when operating in urban environments where the airspace may be crowded with obstacles. Traditionally, fixed-wing UAVs with hovering capabilities had to be custom designed for specific payloads and missions, often requiring custom autopilots and unconventional airframe configurations. With recent government spending cuts, UAV operators like the military and law enforcement agencies have been urging …

High Voltage Pulse Measurement System, Angelo J. Ballungay

Master's Theses

Using isolation and noise immunity techniques, this thesis designs and constructs a low cost measurement system to safely and accurately measure high voltage, high frequency pulses in harsh EM environments. High voltage pulses apply to medical, plasma, and food industries. The difficulty of accurately measuring high voltage pulses continues to pose an issue. Measuring high voltage systems can cause damage to the system, the measurement system, and the user. High voltage and high frequency pulses create a harsh environment of electromagnetic fields that can disrupt the circuitry of the measurement system and harm the user. Implementing isolation from the high …

Action Potential Simulation Of The Hirudo Medicinalis's Retzius Cell In Matlab, Zechari Ryan Tempesta

Master's Theses

Modification of Hodgkin and Huxley’s experimentally derived set of nonlinear differential equations was implemented to accurately simulate the action potential of the Hirudo Medicinalis’s Retzius cell in MATLAB under analogous conditions to those found in the Retzius cell environment. The voltage-gated sodium and potassium channel responses to changes in membrane potential, as experimentally determined by Hodgkin and Huxley, were manipulated to suit simulation parameters established by electrophysiological Retzius cell recordings. Application of this methodology permitted additional accurate simulation of the Hirudo Medicinalis’s P cell under analogous conditions to those found in the P cell environment. Further refinement of this technique …