Digital Commons Network^™

Stable Carbon Isotope Discrimination By Rubisco Enzymes Relevant To The Global Carbon Cycle, Amanda J. Boller

USF Tampa Graduate Theses and Dissertations

Five different forms of ribulose 1,5-bisphosphate carboxylase/oxygenase (RubisCO; IA, IB, IC, ID, II), the carboxylase of the Calvin-Benson-Bassham cycle (CBB), are utilized by plants, algae and autotrophic bacteria for carbon fixation. Discrimination against ¹³C by RubisCO is a major factor dictating the stable carbon isotopic composition (δ¹³C = {[¹³C/¹²C sample/¹³C/¹²C standard] - 1} X 1000) of biomass. To date, isotope discrimination, expressed as ε values (={[¹²k/¹³k] - 1} X 1000; ¹²k and ¹³k …

Strategizing Relationships 2.0: An Analysis Of International Companies' Use Of Social Media, Jessica Marie Brightman

USF Tampa Graduate Theses and Dissertations

Because of technological advances and the blurring of boundaries, the world is becoming a global community. Global communications have made it essential for multinational corporations to develop and maintain a consistent worldwide identity and brand image. It is no longer possible to classify people into simple and stable segments of customers; the world is evolving and so is the population. The purpose of this research is to bridge the gap between the academic and professional world of international public relations by expanding the stream of literature and incorporating a global aspect. Within the last few years, social media has seen …

Aggregation Of Sediment And Bacteria With Mucilage From The Opuntia Ficus-Indica Cactus, Audrey Lynn Buttice

USF Tampa Graduate Theses and Dissertations

Flocculants are commonly used in industrial settings where solid-liquid separations are desired including industrial and municipal wastewater management and potable water production facilities. Conventional flocculants include inorganic metal salts and synthetic organic polymers. The cost, availability, and harmful effects of the non-biodegradable nature of these flocculants have led to the widespread study of natural flocculants. Current natural flocculants being studied include polysaccharides cultivated from microbial extracellular matrix products and plant based materials. In this study, the mucilage of Opuntia ficus-indica cactus was evaluated as a natural flocculant for sediments and bacteria. The O. ficus-indica cactus is also known as the …

An Exploratory Study Of Reception Of Organizational Citizenship Behaviors And Work Related Outcomes: It Is Good For Your Co-Workers, Xinxuan Che

USF Tampa Graduate Theses and Dissertations

The predictors of organizational citizenship behavior (OCB) - performance that supports the social and psychological environment in which task performance takes place - have been studied extensively in previous research. Surprisingly, only a few studies have looked into OCB's effects on individuals who might benefit from it. The purpose of the current study was to explore effects of individual-level OCB on its recipients. Reception of OCB (ROCB) is described and proposed to be related to targets' performance, job stress and job strains. In addition, narcissism and proactive personality were explored as predictors of reception of OCB also as moderators of …

Digital Holographic Measurement Of Nanometric Optical Excitation On Soft Matter By Optical Pressure And Photothermal Interactions, David C. Clark

USF Tampa Graduate Theses and Dissertations

In this dissertation we use digital holographic quantitative phase microscopy to observe and measure phase-only structures due to induced photothermal interactions and nanoscopic structures produced by photomechanical interactions. Our use of the angular spectrum method combined with off-axis digital holography allows for the successful hologram acquisition and processing necessary to view these phenomena with nanometric and, in many cases, subnanometric precision. We show through applications that this has significance in metrology of bulk fluid and interfacial properties.

Our accurate quantitative phase mapping of the optically induced thermal lens in media leads to improved measurement of the absorption coefficient over existing …

Modernization From Above: Social Mobilization, Political Institutionalization And Instability: A Case Study Of Iran (1953-1979), Jeffrey Robert Cobb

USF Tampa Graduate Theses and Dissertations

This case study is in an effort to demonstrate the disastrous effects of modernization via social mobilization and economic development when initiated from above and through foreign intrusion. Initially, this research will examine previous theoretical literature regarding the political phenomenon of modernization and social mobilization. My primary focus will center on the problems that occur when rapid modernization, based on an exogenous model, is forced onto a traditional society by elites and social mobilization outpaces political institutionalization. My case study will focus on the country of Iran, as the political and societal factors of interest seem to be highly illustrative …

Can You Believe She Did That?!:Breaking The Codes Of "Good" Mothering In 1970s Horror Films, Jessica Michelle Collard

USF Tampa Graduate Theses and Dissertations

The threats found in horror films change with time, each decade consisting of threats that were most frightening for the time period. Horror film scholars, such as Andrew Tudor, determined that in 1970s horror films the threat has migrated from external forces into the home and the family. Invading aliens and monsters were thrown replaced by psychosis and evil children. This notion of making the familiar unfamiliar and threatening is paralleled in concerns addressed during the second-wave of feminism; women were making the normative and familiar idea of mother unfamiliar as they migrated from the private and into the public …

Talking About Talk: The Problem Of Communication As An Object Of Study In Public Participation Research, Lauren Leigh Cutlip

USF Tampa Graduate Theses and Dissertations

When citizens participate in risk assessment and decision-making for environmental and other issues that affect members of the public, more robust decisions may be made. Public participation in policy decisions is not only more democratic, but it also enables members of the public to contribute valuable expertise to the decision-making process. However, the development of an effective forum for such participatory projects has been difficult. Participation mechanisms that foster dialogue and interactive exchange between participants have been regarded as the most beneficial, but the practical application of these mechanisms has been observed to be problematic. The goal of this study …

The Effects Of Food Insecurity On Mental Wellbeing In Monteverde Costa Rica, Robert Eugene Cowherd

USF Tampa Graduate Theses and Dissertations

The rapid expansion of ecotourism in the Monteverde zone of Costa Rica has increased the incidence in food insecurity in the area. Changes in food preferences and availability have led to a more homogenized diet that is increasingly delocalized and reliant on processed foods. Additionally, there has been a rapid economic shift away from agricultural and dairy farming to an economy more reliant on tourism. This NSF supported study builds upon data from a longitudinal investigation (#BNS 0753017) examining the nutritional effects of this rapid economic transition. Using a mixed methods approach, a culturally appropriate scale of stress was developed …

Painting Puertorriqueñidad: The Jíbaro As A Symbol Of Creole Nationalism In Puerto Rican Art Before And After 1898, Jeffrey L. Boe

USF Tampa Graduate Theses and Dissertations

In the three decades surrounding the Spanish-American war (1880-1910), three prominent Puerto Rican artists, Francisco Oller (1833-1917), Manuel E. Jordan (1853-1919), and Ramón Frade (1875-1954) created a group of paintings depicting "el jíbaro," the rural Puerto Rican farm worker, in a way that can be appropriately labeled "nationalistic." Using a set of motifs involving clothes, customs, domestic architecture and agricultural practices unique to rural Puerto Rico, they contributed to the imagination of a communal identity for creoles at the turn of the century. ("Creole" here refers to individuals of Spanish heritage, born on the island of Puerto Rico.) …

Efficacy Of Increased Ube3a Protein Levels In The Brain In Rescuing The Phenotype Of An Angelman Syndrome Mouse, Jennifer L. Daily

USF Tampa Graduate Theses and Dissertations

Angelman syndrome (AS), a genetic disorder occurring in approximately one in every 15,000 births, is characterized by severe mental retardation, seizures, difficulty speaking and ataxia. The gene responsible for AS was discovered to be UBE3A and encodes an E6-AP ubiquitin ligase. A unique feature of this gene is that it undergoes maternal imprinting in a neuron-specific manner. In the majority of AS cases, there is a mutation or deletion in the maternally inherited UBE3A gene, although other cases are the result of uniparental disomy or mismethylation of the maternal gene. While most human disorders characterized by severe mental retardation involve …

The Relationship Between The Social Construction Of Race And The Black/White Test Score Gap In, Toriano M. Dempsey

USF Tampa Graduate Theses and Dissertations

ABSTRACT

This research is an investigation into the relationship between the resegregation of American

public schools and the social creation of race. This research is based on the popular notion that

American public schools are failing to produce students capable of competing in today's global society.

The proof most often used to assert the failure of American public schools is the Black/White Test Score

Gap. For the purposes of this research the Black/White Test Score Gap is defined as the gap between

the scores on academic standardized tests between Black public school students and White public school

students regardless of …

Impact Of Occupational Health Interventions In Indonesia, Hanifa Maher Denny

USF Tampa Graduate Theses and Dissertations

Although the Ministry of Health, Indonesia, has achieved some successful occupational health interventions, published literature on such interventions in Indonesia remains scarce.

This study utilized mixed methods of qualitative and quantitative research for the years 2010 and 2011. The qualitative study covered respondents in West, Central, and East Java Provinces to gather stakeholders' perspectives on the impact, effectiveness, adoption, implementation, maintenance, and barriers of occupational health services for informal sectors in Indonesia. The quantitative portion measured the impact of occupational health training for community health officers using Reach, Efficacy, Adoption, Implementation and Maintenance (RE-AIM) dimensions. West Java, as a province …

Targeting Α4 Integrin Containing Complexes In Multiple Myeloma Using Peptidomimetics, Michael Foster Emmons

USF Tampa Graduate Theses and Dissertations

In our previous work we demonstrated that the integrin antagonist, HYD1, induced necrotic cell death in myeloma cell lines in vitro and in vivo as a single agent. In order to further delineate biomarkers of response to HYD1 we developed an isogenic drug resistant variant named H929-60. We show that the acquisition of resistance towards HYD1 correlates with reduced expression of the cleaved α4 integrin subunit and beta 1 integrin. Moreover, we demonstrate that HYD1 interacts with α4 integrin in myeloma cells. Consistent with reduced VLA-4 expression, the resistant variant showed ablated functional binding to fibronectin, VCAM-1 and the bone …

Reciprocity And Development In Disaster-Induced Resettlement In Andean Ecuador, Albert J. Faas

USF Tampa Graduate Theses and Dissertations

This dissertation addresses gaps in anthropological knowledge about how reciprocity--and a specifically Andean form of reciprocity--works in disaster and resettlement settings. This study looks at the practices of reciprocity in a disaster-affected community (Manzano) and a disaster-induced resettlement (Pusuca) in the Andean highlands of Ecuador. Specifically, it examines two aspects of reciprocal exchange practices in these sites. It first looks at some of the factors that affect the continuity of reciprocal exchange practices, which other studies have found to play a vital role in recovery from disasters and resettlement. It then looks to the roles of unequal power relations in …

Variability In Hydrology And Ecosystem Properties And Their Role In Regulating Soil Organic Matter Stability In Wetlands Of West-Central Florida, Sharon Jean Feit

USF Tampa Graduate Theses and Dissertations

Soil organic matter (SOM) provides many ecosystem services that are necessary for continued ecosystem function. The accumulation of SOM in an ecosystem is a function of its persistence time which can range from days to thousands of years. Ecosystem properties including dominant vegetation type, soil texture, and soil moisture in various habitats can regulate the persistence time of SOM.

Wetlands, because of their associated ecosystem properties, promote SOM accumulation, but little has been done to determine the ecosystem properties that regulate its persistence over time. In west-central Florida, urbanization and increased water demands have suppressed water tables in isolated wetland …

Development Of Materials And Structures For P-Type Contacts In Cdte Solar Cells, Dino Ferizovic

USF Tampa Graduate Theses and Dissertations

Solar cells based on CdTe absorbers are attractive due to the optimal direct band gap energy and large absorption coefficient of CdTe, however, their performance and commercialization is hindered by the lack of reliable p-type contacts. CdTe has a low carrier concentration and a large electron affinity, which results in a requirement of non-realistic work functions for metals to be used as back contacts in the solar cell. Even noble metals such as Ag present a significantly large potential barrier for holes, thereby reducing the hole current through the semiconductor/metal interface. Several attempts to resolve this challenge have been …

A Multi-Perspective Exploration Of A Cross-Age Tutoring Initiative: An Analysis Of The Responses Of All Students, Ann Elizabeth Gillies

USF Tampa Graduate Theses and Dissertations

This exploratory study assessed the effectiveness of a cross-age tutoring intervention on adaptive behavior goals of three PreKindergarten/Kindergarten-aged students with labels of autism spectrum disorder. Data were collected in an inclusive environment; the school library. Three fourth grade general education cross-age tutors were trained to use a simple, naturalistic least-to-most prompting strategy to support the young students with individualized adaptive behavior goals while in the library. A mixed method design was utilized in this study; a quantitative single case multiple baseline across participants design to show performance outcomes of the young students as a result of the tutoring intervention, and …

Thermal Determinants Of Nest Site Selection In Loggerhead Sea Turtles, Caretta Caretta, At Casey Key, Florida, Lindsey Nicole Flynn

USF Tampa Graduate Theses and Dissertations

Many environmental cues are thought to influence nest site selection by loggerhead sea turtles, Caretta caretta, and much debate exists over the possible influence of sand temperature. This study had two primary objectives: (1) to measure thermal differences across transects of a major nesting beach of Casey Key (28.7 N, 82.3 W), Florida and (2) to evaluate thermal pattern variation that influenced nesting patterns of adult female loggerhead sea turtles. A secondary objective of this study was to determine the efficacy of infrared thermometers to collect sand surface temperatures in the field.

Temperature data were collected from 145 nest …

Task Comparison Between Career Counselors And Vocational Evaluators: What's The Difference?, Jill Flansburg

USF Tampa Graduate Theses and Dissertations

This investigation compared the essential tasks of career counselors and vocational evaluators by surveying experts and practitioners in each specialization. Although both services advise persons about their work and training options, career counseling often takes place in university career centers and vocational evaluation is made available in not-for-profit settings. The null hypothesis is that there are no differences in task importance or frequency between these two jobs. Previous literature and current job descriptions from Florida workplaces are used to identify tasks, which are then presented to experts for input regarding frequency and relative importance to job performance.

Tasks endorsed by …

The Effect Of Tight Glycemic Control On Surgical Site Infection Rates In Patients Undergoing Open Heart Surgery, Sierra Gower

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to investigate the effects of three different glycemic control conditions (tight, conventional, and standard) in the intraoperative period on: 1) postoperative surgical site infections, and 2) postoperative procalcitonin, and C-reactive protein levels in patients undergoing open-heart surgery. Secondary aims of the study were to investigate the effects of the three glycemic treatment conditions on: 1) intraoperative blood glucose; 2) intraoperative glycemic stability; and 3) intensive care unit length of stay, in patients undergoing open-heart surgery.

An experimental design with a multilevel, single factor, within-subjects design was utilized. Patients were nested within anesthesia provider teams. …

Tagline: Information Extraction For Semi-Structured Text Elements In Medical Progress Notes, Dezon K. Finch

USF Tampa Graduate Theses and Dissertations

Text analysis has become an important research activity in the Department of Veterans Affairs (VA). Statistical text mining and natural language processing have been shown to be very effective for extracting useful information from medical documents. However, neither of these techniques is effective at extracting the information stored in semi-structure text elements. A prototype system (TagLine) was developed as a method for extracting information from the semi-structured portions of text using machine learning. Features for the learning machine were suggested by prior work, as well as by examining the text, and selecting those attributes that help distinguish the various classes …

Assessment Of Diver Impact During The Spiny Lobster Sport Season, Florida Keys, Usa, Mark Lewis Hartman

USF Tampa Graduate Theses and Dissertations

The Spiny Lobster (Panulirus argus) fishery in Florida is closed during the spawning season (March-July) except for a two-day recreational `miniseason' for sport divers in July, several days prior to the opening of the commercial fishing season. In Monroe County, recreational fishers, who possess a valid Saltwater Fishing License with crawfish stamp, are allowed to harvest six lobsters per day, each with a minimum carapace length of 76.2 mm (3.0 inches). During these two days, approximately 50,000 people attempt to catch lobster, and the number of boats visiting the reef has been estimated to be up to 900 times higher …

"People...Do Not Come With Standardized Circumstances": Toward A Model For An Anthropology Of E-Government, Marc K. Hebert

USF Tampa Graduate Theses and Dissertations

Many Americans appreciate the availability and ease of using government websites to conduct their business with the state. What then of the most vulnerable in society? How do they access and use a standardized application process for government assistance, considering their potential resource, educational and physical constraints? Many go to public libraries and non-governmental organizations (NGOs), which shifts the responsibility to help applicants from the government agency administering the program to local actors whose primary duties lie elsewhere.

The aim of this research is to document the experiences of three groups of people, primarily located in a central Florida, urban …

Comparative Outcomes Assessment Of The C-Leg And X2 Knee Prosthesis, Michael Jason Highsmith

USF Tampa Graduate Theses and Dissertations

Background

There are more than 300,000 persons in the U.S. living with transfemoral amputation (TFA). Persons with TFA use a knee prosthesis for gait and mobility. Presently, the C-Leg microprocessor knee prosthesis is the standard of care. C-Leg has significantly improved safety and cost efficacy and has created modest gains in gait efficiency. Recently, a new prosthesis has introduced a new sensor array and processor that reportedly improves knee motion, stair function and standing stability. Early claims of the reported functional benefits of the new Genium knee (formerly X2) have not been validated in a rigorous clinical trial. Therefore, the …

No Honor Among Snails: Conspecific Competition Leads To Incomplete Drill Holes In The Naticid Gastropod Neverita Delessertiana (R Cluz), Jack A. Hutchings

USF Tampa Graduate Theses and Dissertations

The fossil record of drilling predation has been widely used to study predator-prey interactions and their relative importance on long-term evolutionary processes. Incomplete drill holes have been interpreted as indicators of failed attacks due to well-defended prey. However, this interpretation is based on pair-wise interactions between one predator and one prey, a condition commonly compromised in nature. The hypothesis that interference among drilling predators leads to an increase in the relative frequency of incomplete drill holes was tested in the laboratory using the naticid Neverita delessertiana (R cluz) and a common prey, the bivalve Chione elevata (Say). The experiment consisted …

Perceptions Of A Learning Organization And Factors Within The Work Environment That Influence Transfer Of Training In Law Enforcement, Yvonne Olive Hunter-Johnson

USF Tampa Graduate Theses and Dissertations

Abstract

The purpose of this study was to determine law enforcement officers' perception of factors within the workplace that influence transfer of training and their perception of the organization being a learning organization. The study actually had three parts. First, it intended to investigate the perception of law enforcement officers regarding factors within their work environment that influence or impede the transfer of training process (specifically, organizational support and transfer climate/culture). Second, it intended to determine the perception of law enforcement officers concerning the promotion of their organization's learning practices, learning culture, and the continuous learning environment at an individual, …

Effects Of Gps Error On Animal Home Range Estimates, Garrett Hyzer

USF Tampa Graduate Theses and Dissertations

This study examined how variables related to habitat cover types can affect the positional accuracy of Global Positioning System (GPS) data and, subsequently, how wildlife home range analysis can be influenced when utilizing this inaccurate data. This study focused on measuring GPS accuracy relative to five habitat variables: open canopy, sparse canopy, dense canopy, open water, and building proximity. The study took place in Hillsborough County, in residential areas that contain all of these habitat types. Five GPS devices, designed for wildlife tracking purposes, were used to collect the data needed for this study. GPS data was collected under the …

Increasing Parental Involvement In Early Childhood Education, Kendall Jeffries

USF Tampa Graduate Theses and Dissertations

Parental involvement during preschool has been linked with stronger pre-literacy skills, acquisition of mathematical skills, well-developed social skills, and positive attitudes toward school (Arnold, Zeljo, Doctoroff, & Ortiff, 2008; Powell, Son, File, & San Juan, 2010). Parents' active involvement in their children's learning is a recommended strategy in engaging families in children's education experiences (Henderson & Mapp, 2002). The purpose of the current study was to measure the impact of parents' active participation in a parent-directed early literacy intervention on parental home-based involvement, school-based involvement, and home-school conferencing among Head Start parents and their preschool-aged children. The study used a …

Chiral Binol Metal Phosphate/Phosphoric Acid Catalyzed Enantioselective Addition Of Phosphorus And Sulfur Nucleophiles To Imines And Epoxides, Gajendrasingh Ingle

USF Tampa Graduate Theses and Dissertations

The research presented in this dissertation focuses on chiral BINOL metal phosphatephosphoric acid catalyzed enantioselective additions of phosphorus and sulfur nucleophiles to imines and epoxides. In chapter 2, we reported a new method to synthesize chiral amino phosphine oxides. The reaction combines N-substituted imines and diphenylphosphine oxide catalyzed by chiral magnesium 9-antryl phosphate. A wide variety of aliphatic and aromatic aldimines substituted by electron neutral benzhydryl or dibenzocycloheptene groups were excellent substrates for the addition reaction. The imines protected with dibenzocycloheptene protecting group provided better enantioselectivity than those protected with benzhydryl group, while both imines gave comparable yields. Also, …