Digital Commons Network^™

Owss And Mimo-Stc-Ofdm: Signaling Systems For The Next Generation Of High Speed Wireless Lans, Dinesh Divakaran

USF Tampa Graduate Theses and Dissertations

The current popularity of WLANs is a testament primarily to their convenience, cost efficiency and ease of integration. Even now the demand for high data rate wireless communications has increased fourfold as consumers demand better multimedia communications over the wireless medium. The next generation of high speed WLANs is expected to meet this increased demand for capacity coupled with high performance and spectral efficiency. The current generation of WLANs utilizes Orthogonal Frequency Division Multiplexing (OFDM) modulation. The next generation of WLAN standards can be made possible either by developing a different modulation technique or combining legacy OFDM with Multiple Input …

Re-Establishing Place Through Knowledge: A Facility For Earth Construction Education In Pisco, Peru, Hannah Jo Sebastian

USF Tampa Graduate Theses and Dissertations

Human vulnerability can be characterized as people living with uncertain livelihood options, precariously settled in structurally unsafe buildings. A striking aspect of this vulnerability is the large number of people living in earthen structures within seismically active zones. This reality is exemplified by the earthquake which occurred this past summer around Pisco, Peru. The earthquake caused enormous damage to more than 80% of the adobe buildings. Although confined masonry is the preferred construction technique for families who can afford it, adobe is still the only economically viable alternative for most.

Presently reconstruction efforts are focused on encouraging residents to build …

Sedimentation Of Organic - Inorganic Composites By Optical Turbidity, Reshma K. Harrinauth

USF Tampa Graduate Theses and Dissertations

Sedimentation is one of many characterization tools used to test materials in nanotechnology. Characterization of settling behavior is complex as there are many variables which can affect sedimentation. In our research, we focused on sedimentation in colloidal systems with the aid of an optical turbidometer. Nanoparticles of CeO₂ (Ceria Oxide) and TiO₂ (Titanium Dioxide) are embedded onto a polymeric matrix of a thermally responsive microgel of poly(N-isopropylacrylamide) (PNIPAM) and interpenetrating chains of poly(acrylic acid) to create novel composites. The composites are loaded with the inorganic oxide nanoparticles at different weight percent from a low value of 10 weight …

Reburb: Redefining The Suburban Family Unit Under A New Construction Ecology, Matthew A. Lobeck

USF Tampa Graduate Theses and Dissertations

“Our structures might be machines for living in, but there was no longer much about them that was alive.”

-William McDonough, Cradle to Cradle

Home ownership is a significant driver within American culture. In Florida single-family homes represent one of the largest components of our built surroundings, significantly impacting the environment through material use and energy consumption. Currently, homes typically are built with little regard to the environmental context. By designing for the immediate goal of separation from the elements, they do not provide for convenient spatial expansion or adaptability, using material assemblies that do not lend themselves to be …

Landscape As Urbanism, Ryan Nicholas Abraham

USF Tampa Graduate Theses and Dissertations

Scholars have suggested that landscape become the main ordering device in the development of the built environment. Traditional methods of urban planning have categorized landscape as a cosmetic application, the purpose of which is to beautify the urban environment after the planning and development phases. The problems associated with globalization and rapid urbanization at present includes the commoditization of urban form. As a result of this trend, many cities are becoming less and less distinguishable from one another, as urban form is generated without considering the particularities of site and context. The lack of a more specific understanding of a …

Copper Doped Window Layer For Cdse Solar Cells, Sheetal Kumar Chanda

USF Tampa Graduate Theses and Dissertations

CdSe solar cells with ZnTe as the window layer deposited by CSS process have shown V_oc's around 630mV. However the currents were very low and also the voltages were not meeting the desired objectives. To improve the performance the contact energy at the ZnTe/Cu interface should be minimized by doping the window layer.

Thermal evaporation was used to deposit ZnTe to have more control over the composition of the film. Initial experiments were done by depositing Cu doped ZnTe films on plain glass by co-evaporating both ZnTe and Cu. The conductivity was in the order of 10e3 which …

Impact Of Seizure-Related Variables And Psychopathology On Health-Related Quality Of Life In Pediatric Epilepsy, Aja M. Meyer

USF Tampa Graduate Theses and Dissertations

Psychopathology typically is a lasting condition that is persistent from childhood to adulthood. Therefore, it is imperative that children with health conditions and comorbid psychiatric disorders are treated for both conditions as they are likely to have a significant negative impact on children's overall health-related quality of life (HRQL). More specifically, it is important to identify the variables that affect HRQL in children with epilepsy. Research has shown that biomedical variables such as seizure severity and frequency have only moderate relationships with HRQL; therefore, additional factors, such as depression and anxiety, must be identified so that they also may be …

Talking With Exotic Pet Owners: Exploratory Audience Research On Wildlife Television And Human-Animal Interactions, Susannah L. Smith

USF Tampa Graduate Theses and Dissertations

This qualitative grounded study explores the potential relationship between wildlife TV viewing and human-animal interactions for exotic pet owners. The method involved 13 in-depth interviews and a qualifying open-ended questionnaire with 37 individuals. The interviews gathered viewers' interpretations of two different human-wildlife interactions on TV and served as a launching point for discussion. Findings supported the literature in that wildlife TV was an important source of information, emotion, and contradictory messages. Themes also emerged regarding participants' characterizations of their relationships with their pets. Drawing from social cognitive theory, this thesis suggests the following potential motivators for participants to model animal …

Eco_Urbanism Restitching Clearwater's Urban Fabric Through Transit And Nature, Daniel P. Uebler

USF Tampa Graduate Theses and Dissertations

Downtown Clearwater has grown to be disconnected from its surroundings due to an adjacent buffer area and the lack of a transit system to bring people into the city. The downtown core is also separated from its neighboring residential areas by an area of vacant land that holds in it the potential to become a gateway into the city. On a macro scale the city has grown to be separated from the Tampa Bay area due to the lack of a mass transit system.

The goal of this project is to create a new "new urbanism" in which transit and …

Permanent Supportive Housing In Tampa, Florida: Facilitating Transition Through Site, Program, & Design, Nicole Lara Dodd

USF Tampa Graduate Theses and Dissertations

Rapid re-housing of the homeless into permanent supportive housing has proven to be cost effective. The improved quality of life and stability reduces stress on the formerly homeless and therefore increases their viability as self-sufficient individuals.

Hillsborough County (which encompasses Tampa, Florida) reported 9,532 homeless persons on any given night in the year 2007. Currently, there is not enough housing to meet the needs of every individual. While existing housing facilities contribute a great deal to this community, their locations in dilapidated urban conditions are not the most conducive environments for homeless persons to succeed. The stigma associated with the …

Socializing Housing Phased Early Response To Impromptu Migrant Encampments In Lima, Peru, Raul E. Mayta

USF Tampa Graduate Theses and Dissertations

Every year hundreds of people migrate from the highlands of Peru to the coastal capital of Lima searching for economic and social stability. These groups of people have similar characteristics that keep them together they come from the same city, are members of the same family, have the same religion, have similar goals, and so on. Once in Lima they take possession of the only free areas left in the city: the mountains. Due to a lack of economic resources, poor urban planning and unsuitable site conditions the settlements grow for years in a disorderly, unsafe and unsanitary way, creating …

The Virtual Landscape Of Geological Information Topics, Methods, And Rhetoric In Modern Geology, Sarah Elizabeth Fratesi

USF Tampa Graduate Theses and Dissertations

Geology is undergoing changes that could influence its knowledge claims, reportedly becoming more laboratory-based, technology-driven, quantitative, and physics- and chemistry-rich over time. This dissertation uses techniques from information science and linguistics to examine the geologic literature of 1945-2005. It consists of two studies: an examination of the geological literature as an expanding network of related subdisciplines, and an investigation of the linguistic and graphical argumentation strategies within geological journal articles.

The first investigation is a large-scale study of topics within articles from 67 geologic journals. Clustering of subdiscipline journals based on titles and keywords reveals six major areas of geology: …

Reestablishing The Neighborhood: Exploring New Relationships & Strategies In Inner City Single Family Home Development, Jeremy Michael Hughes

USF Tampa Graduate Theses and Dissertations

Since the end of World War II, American cities have been stuck in the development trend of urban sprawl. The suburban ideal and proliferation of the automobile have fostered this trend, as well as several other negative issues in our society including inefficient land use and isolation of lower social and economic groups. After fifty years as the model by which American cities grow, it has proven itself to be both inefficient in land use and ineffective in bridging the social gaps that have existed since its inception. A new model for city growth is necessary, one that encourages steady …

Beyond Risk Factors: The Theoretical Contextualization Of Illicit Adhd Medication Use Among High School Students, William Christopher Watkins

USF Tampa Graduate Theses and Dissertations

Prescription ADHD medication has been shown to be on the rise as a drug of abuse among young people. Unlike other drugs that serve only the purpose of achieving a high, this particular substance can also be perceived as useful and beneficial by those who abuse it. It is these positive attributes given to the illicit use of these drugs that make them so dangerous, especially in the hands of youths. To date extant research has made little effort to contextualize this type of drug use within theories of deviance. This study looks to fill that void as well as …

Public Perceptions Of The Separation Of Church And State, Donald Foster

USF Tampa Graduate Theses and Dissertations

Much of the scholarly work in the area of the separation of church and state in America has centered on such lofty goals as examining the Constitution of the United States and voluminous court documents. Others meticulously scrutinize every word ever uttered by the founding fathers on the subject. During the last two decades, there has been a considerable increase in the debate concerning the separation of church and state. The religious right has become determined to infuse our governmental institutions with a decidedly more religious tone, while the religious left prefers the separation of church and state as it …

Reconstructions: The Contemporary Southern Landscape By Its Photographers, Natalie Kersey Gillis

USF Tampa Graduate Theses and Dissertations

The purpose of this thesis is to examine the work of landscape photographers living and working in the Southern region of the United States and to explore what their images visually communicate about their relationship to the Southern land and its distinctive history. This objective is accomplished through an analysis of the work of three contemporary landscape photographers who reside in the South, and work primarily within their local hometowns.

This thesis examines the work of photographers William Christenberry, Sally Mann, and John McWilliams. Each is a photographer who is native to the American South and has used his or …

Protecting The Self: An Ethnographic Study Of Emotion Management Among Child Protective Investigators, Aaron Christopher Howell

USF Tampa Graduate Theses and Dissertations

The question that I investigate here is what emotion work is performed by child protective investigators in order to be successful at their work, and how do they manage these emotional challenges within a community of their peers? Many different workers, from airline employees (Hochschild, 1983) to mortuary science students (Cahill, 1999) to 911 operators (Shuler & Sypher, 2000), have been studied to examine strategies and effects of emotion management. Yet scholars do not agree on whether emotion management at work is positive or negative.

For my research, I conducted interviews with ten investigators and observed a night unit of …

Thin Film Metal-Insulator-Metal Tunnel Junctions For Millimeter Wave Detection, Subramanian Krishnan

USF Tampa Graduate Theses and Dissertations

Millimeter wave imaging systems are the next generation imaging systems being developed for security and surveillance purposes. In this work, thin film metal-insulator-metal (MIM) tunnel junction based detector using Ni-NiO-Cr has been developed for the first time for millimeter wave detection operating at 94 GHz. Extensive process development has been carried out to fabricate the MIM junctions. Arrays of MIM junctions with 1 µm² contact area and ultra-thin insulator layer of ~3 nanometer have been developed using e-beam lithography and reactive sputtering, respectively. MIM diodes were also fabricated in a bulk-micromachined diaphragm configuration to minimize surface wave loss.

DC and …

Resting Oxygen Consumption Rates In Divers Using Diver Propulsion Devices, Adam J. Smith

USF Tampa Graduate Theses and Dissertations

The Marine Corps Systems Command documented mission requirements that cannot be met by current rebreathers. They need to extend dive times without compromising the stealth and compact design of existing devices. This can be accomplished by reducing the fresh gas flow rate. The current flow rate is adequate to support a diver in heavy work. However, the diver will be utilizing a Diver Propulsion Device (DPD) during a large portion of the mission in question. The assumption, then, is that this portion of the mission will not require "hard work". Thus, a new fresh gas flow rate can be established …

Nanomanufacturing Of Silica Nanowires: Synthesis, Characterization And Applications, Praveen Kumar Sekhar

USF Tampa Graduate Theses and Dissertations

In this research, selective and bottom-up manufacturing of silica nanowires on silicon (Si) and its applications has been investigated. Localized synthesis of these nanowires on Si was achieved by metal thin film catalysis and metal ion implantation based seeding approach. The growth mechanism of the nanowires followed a vapor-liquid-solid (VLS) mechanism. Mass manufacturing aspects such as growth rate, re-usability of the substrate and experimental growth model were also investigated. Further, silica nanowires were explored as surface enhanced Raman (SER) substrate and immunoassay templates towards optical and electrochemical detection of cancer biomarkers respectively. Investigating their use in photonic applications, optically active …

The Process Of Change Experienced By Pre-Service And In-Service Social Studies Teachers In An Online Content Area Reading Course, Aimee L. Alexander-Shea

USF Tampa Graduate Theses and Dissertations

With the passing of the No Child Left Behind Act of 2001 and subsequent high-stakes tests, including the Florida Comprehensive Assessment Test (FCAT), literacy has become top priority in the field of education (Florida Department of Education [FDOE], no date a; NCLB, 2002). Though social studies was not mentioned in NCLB, nor is it tested by the FCAT, social studies teachers are expected to teach literacy skills in their classrooms. Social studies teachers' accountability for literacy enhancement is evidenced by the fact that some states, including Florida, now require social studies teachers to complete a course in reading integration to …

Supervision In School Psychology: Assessing The Relationship With Professional Practices, Vicki Dumois Papaemaneul

USF Tampa Graduate Theses and Dissertations

The present study examined the relationship between the occurrence of reported supervision and the professional practices of school psychologists. Information provided by more than 1,700 school psychologists in response to the National Association of School Psychologists: Demographic and Professional Practices Survey 1999-2000 School Year - NASP-DPPS 2000 survey were used to create the 1999-2000 national database (Curtis, et al., 2000) and served as the basis for secondary analyses in the current study. The NASPDPPS 2000 collected information regarding the demographic characteristics, employment conditions and professional practices of school psychologists the United States.

Correlational and multiple regression analyses were completed to …

Compliant Prosthetic Knee Extension Aid: A Finite Elements Analysis Investigation Of Proprioceptive Feedback During The Swing Phase Of Ambulation, Adam Daniel Roetter

USF Tampa Graduate Theses and Dissertations

Compliant mechanisms offer several design advantages which may be exploited in prosthetic joint research and development: they are light-weight, have low cost, are easy to manufacture, have high-reliability, and have the ability to be designed for displacement loads. Designing a mechanism to perform optimally under displacement rather than force loading allows underlying characteristics of the swing phase of gait, such as the maximum heel rise and terminal swing to be developed into a prosthetic knee joint. The objective of this thesis was to develop a mechanical add-on compliant link to an existing prosthetic knee which would perform to optimal standards …

Evaluation Of The Public Health Risks Associated With Former Manufactured Gas Plants, Robin Brewer Dehate

USF Tampa Graduate Theses and Dissertations

Regulatory agencies have recently focused on assessing the potential for soil vapor intrusion (SVI) and risk posed to occupants of residential and commercial properties overlying and surrounding former Manufactured Gas Plants (MGPs). This study evaluated the potential for SVI at 10 commercial buildings and 26 single family and multi-family residential properties overlying and/or adjacent to three former MGPs. The potential for SVI exposure was categorized into three groupings according to thickness of the vadose zones: no vadose zone; 0 - 6 feet thick, and 6 to 25 feet thick. Indoor and outdoor air and soil vapor samples were collected and …

Gender, Sport & Nationalism: The Cases Of Canada And India, Courtney Glass

USF Tampa Graduate Theses and Dissertations

This research seeks to explore the gendered nature of nationalisms and the ways that they can be challenged and perhaps transformed through the participation of women in sport at the national level. Nationalism is part of the public sphere, while women have historically been relegated to the private sphere. However, many scholars argue that women do in fact taken part in nation building primarily as biological reproducers of the nation. This has led scholars to conclude that nationalism is indeed gendered. Sport has traditionally been a masculine domain where conceptions of hegemonic masculinity as well as the nation are developed …

The Social Context Of Stress And Social Support Among Immigrant Latinas Diagnosed With Breast Cancer, Dinorah Martinez Tyson

USF Tampa Graduate Theses and Dissertations

Social support plays a crucial role in both the physical and mental adjustment to the diagnosis of breast cancer and its treatment. However, the mediating effects of social support are embedded within the larger, social and cultural contexts in which support given and received. Due to language, culture and economic issues, immigrants may find themselves without the social support and networks that had previously enabled them to cope with illness and disease. This research grounds our understanding of social support and breast cancer within that larger context that includes the social environment and the experience of health disparities.

Ethnographic methods …

Vectors Of Brevetoxins To Marine Mammals, Leanne J. Flewelling

USF Tampa Graduate Theses and Dissertations

Mass mortalities of Florida manatees (Trichechus manatus latirostris) and bottlenose dolphins (Tursiops truncatus) have been attributed to brevetoxins produced by the Florida red tide dinoflagellate Karenia brevis. The multiple routes through which marine mammals can be exposed to brevetoxins have complicated efforts to understand the mechanisms that lead to mass mortality events. In spring of 2002, 34 endangered Florida manatees died in southwest Florida, and in spring of 2004, 107 bottlenose dolphins died in the Florida Panhandle. These events provided unique opportunities to make clear connections between ingested brevetoxins and marine mammal mortalities without the …

Seepage Rates In Closed Basins, Volha Martysevich

USF Tampa Graduate Theses and Dissertations

Seepage is an important component of the water budget in closed basins that do not have surface water drainage features. In the shallow water table environment of Florida, internal drainage of soil controls flooding. With the recent rapid population growth and urban development in the state, a simple, field-based method is needed to estimate seepage rates. In this study five locations in Hillsborough County, Florida, were instrumented with wells with pressure transducers measuring water level fluctuations at 1 minute resolution. For closed basins with lakes, evaporation (E) rates were determined using data from a weather station and Penman-Monteith FAO56 method, …

Cultural Factors And Concepts Of Pollution: Colorectal Cancer And Health Behaviors Among Ashkenazi Jewish Women, Karen Besterman-Dahan

USF Tampa Graduate Theses and Dissertations

The colorectal cancer (CRC) incidence in Ashkenazi Jews has been found to be highest of any ethnic group in the world (Feldman, 2001). It is currently unclear how culture and religion influence health behaviors of U.S. Ashkenazi Jews, as well as what other socio-cultural factors influence AJ women's attitudes towards CRC risk and screening practices. This study aimed at exploring and describing the cultural and religious influences on health behaviors and beliefs related to CRC in Ashkenazi Jewish women. Research participants included seven key informants (rabbis) and forty-two Ashkenazi Jewish women ages 50 and up. Methods included in-depth, qualitative interviews …

The Robustness Of Rasch True Score Preequating To Violations Of Model Assumptions Under Equivalent And Nonequivalent Populations, Garron Gianopulos

USF Tampa Graduate Theses and Dissertations

This study examined the feasibility of using Rasch true score preequating under violated model assumptions and nonequivalent populations. Dichotomous item responses were simulated using a compensatory two dimensional (2D) three parameter logistic (3PL) Item Response Theory (IRT) model. The Rasch model was used to calibrate difficulty parameters using two methods: Fixed Parameter Calibration (FPC) and separate calibration with the Stocking and Lord linking (SCSL) method. A criterion equating function was defined by equating true scores calculated with the generated 2D 3PL IRT item and ability parameters, using random groups equipercentile equating. True score preequating to FPC and SCSL calibrated item …