Digital Commons Network^™

Long-Range, Passive Wireless Monitoring Using Energy-Efficient, Electrically-Small Sensor Nodes And Harmonic Radar Interrogator, Ibrahim Nassar

USF Tampa Graduate Theses and Dissertations

This dissertation investigates the use of the harmonic radar technique for passive wireless sensing applications. Issues of DC power consumption, high RF activation power, large node size, and short communication range associated with the existing passive wireless sensing technologies are addressed by the development of novel, completely passive, high efficiency, compact 3-D harmonic sensor nodes. The node transceiver employs a passive frequency doubler to return the second harmonic of the interrogation signal, and electrically-small 3-D antennas to achieve the compactness and high efficiency. The developed nodes fit inside a sphere with a diameter < 3 cm and achieve communication range > 60 m using a 43 dBm EIRP …

Evaluating The Effects Of Guided Notes And Response Cards In Student Performance, Viviana Gonzalez

USF Tampa Graduate Theses and Dissertations

Abstract

Guided notes and response cards have individually been found effective at increasing student performance and active participation, however, no known studies have compared the effects of response cards with the effects of guided notes to determine if one is more effective than the other at increasing student performance and on-task behavior. In order to evaluate the efficacy of these two teaching methods, two different teaching conditions were examined: guided notes and response cards for in-lecture review. An alternating treatments design was used to evaluate the effects of these two conditions on post-lecture quiz scores, competing academic behaviors and academic …

Utilizing Tagteach To Enhance Proficiency In Dance Movements, Mallory Joanne Quinn

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to evaluate TAGteach as a training procedure to increase the fluency of three dance movements in a multiple baseline across behaviors design with 4 students of dance. Target behaviors included a pirouette/turn, kick, and a leap/jump, respective of the level of the class. A dance instructor was trained to implement the TAGteach procedure by the primary researcher. The targeted dance movements remained at a stable level during baseline and improved sequentially for each participant following the introduction of the TAGteach training. Implications for future research are discussed.

Classification Models In Clinical Decision Making, Eleazar Gil-Herrera

USF Tampa Graduate Theses and Dissertations

In this dissertation, we present a collection of manuscripts describing the development of prognostic models designed to assist clinical decision making. This work is motivated by limitations of commonly used techniques to produce accessible prognostic models with easily interpretable and clinically credible results. Such limitations hinder prognostic model widespread utilization in medical practice.

Our methodology is based on Rough Set Theory (RST) as a mathematical tool for clinical data anal- ysis. We focus on developing rule-based prognostic models for end-of life care decision making in an effort to improve the hospice referral process. The development of the prognostic models is …

Design Of A Highly Portable Data Logging Embedded System For Naturalistic Motorcycle Study, Noureddine Elmehraz

USF Tampa Graduate Theses and Dissertations

According to Motorcycle Industrial Council (MIC), in USA the number of owned

motorcycle increased during last few years and most likely will keep increasing. However, the

number of the deadly crash accidents associated with motorcycles is on the rise. Although MIC

doesn't explain why the accident rate has increased, the unprotected motorcyclist gear can be one

of the reasons. The most recent National Highway Traffic Safety Administration (NHTSA)

annual report stated that its data analyses are based on their experiences and the best judgment is

not based on solid scientific experiment [3]. Thus, building a framework for the data acquisition …

Media That Objectify Women: The Influence On Individuals' Body Image And Perceptions Of Others, Ross Krawczyk

USF Tampa Graduate Theses and Dissertations

Past research has examined body image and eating-related outcomes of exposure to mass media. This research has generally found that such exposure is a significant risk factor for body image disturbance and disordered eating. However, a causal relationship has not yet been firmly established. Several theories, including objectification theory (Fredrickson & Roberts, 1997), have attempted to explain this relationship with some success. The current study had two primary goals. First, it was designed to further explore the potential causal relationship between mass media exposure and body image and affect disturbance. Second, it attempted to go beyond individuals' body image and …

Factors Associated With Fear Of Breast Cancer Recurrence Among Survivors, Jean Marie Lucas

USF Tampa Graduate Theses and Dissertations

The purpose of this cross-sectional, secondary data analysis was to explore, non-modifiable (stable) trait factors and modifiable (transient) state factors associated with fear of recurrence (FOR) in breast cancer survivors. Antecedent trait factors included demographic, clinical, social/behavioral factors, postulated mediator state factors included pain, fatigue, sleep disturbances, depression, state anxiety and perceived stress, and FOR was the outcome variable. The study used baseline data from an R-21 NCI funded (grant #R21CA109168) randomized control trial that examined the effects of mindfulness based stress reduction in early stage breast cancer recovery. Instruments from this study for antecedent variables (trait factors) included a …

School Library Media Specialists' Perceptions Of Collaboration, Leadership And Technology, Jozan Maria Powell

USF Tampa Graduate Theses and Dissertations

School impact media studies indicate that a well-staffed and funded school library media program with a certified school library media specialist (SLMS) positively correlates with increased student achievement. SLMS must have a shared understanding of their roles and responsibilities to positively impact student success. In an effort to determine prior knowledge and differentiated learning objectives, the method of certification is critical for planning professional development. This dissertation presents a multi-method investigation of differences between Alternatively Certified (AC) and Traditionally Certified (TC) SLMS as it relates to their perceptions of collaboration, leadership and technology described in Information Power: Building Partnerships for …

Applications Of Agent Based Approaches In Business: A Three Essay Dissertation, Shankar Prawesh

USF Tampa Graduate Theses and Dissertations

The goal of this dissertation is to investigate the enabling role that agent based simulation plays in business and policy. The aforementioned issue has been addressed in this dissertation through three distinct, but related essays. The first essay is a literature review of different research applications of agent based simulation in various business disciplines, such as finance, economics, information systems, management, marketing and accounting. Various agent based simulation tools to develop computational models are discussed. The second essay uses an agent-based simulation approach to study important properties of the widely used most popular news recommender systems (NRS). This essay highlights …

Community Arts In The Lives Of Disadvantaged African American Youth: Educating For Wellness And Cultural Praxis, Mabel Sabogal

USF Tampa Graduate Theses and Dissertations

The main purpose of this study was to analyze the role and potential of community arts programs and organizations in improving the lives of disadvantaged African American youth, through the creation of a participatory video project and the internal evaluation of the same; using applied anthropological methods, and cultural praxis (an innovative educational design), and following the recommendations of expert community arts programs evaluators. The study responds to the need identified in the community arts literature to offer robust program evaluations that explain the benefits of such programs. The lack of evidence seems to derive not only from the difficulties …

Strategic Messaging In A Political Crisis: Testing The Integrated Model For Explaining The Communication Behavior Of Publics, Tiffany Lynn Schweickart

USF Tampa Graduate Theses and Dissertations

Crisis response message strategies were examined using a post test-only randomized experiment (N=252) to determine their influence on perceptual, cognitive, and motivational antecedents to communication behavior in a political context. Results indicate that: (1) strategy type influences perceived strategy effectiveness; (2) situational beliefs influence situational motivation, subjective norm, and attitudes; (3) subjective norm and attitudes influence behavioral intention; and (4) referent criterion, situational motivation, and behavioral intention influence communicative action in publics during a political crisis.

From Limited-English-Proficient To Educator: Perspectives On Three Spanish-English Biliteracy Journeys, Elizabeth Visedo

USF Tampa Graduate Theses and Dissertations

The purpose of this multicase study was to describe and explain the perceptions of three Spanish-English culturally and linguistically diverse (CLD) high achievers on their biliteracy journeys to become educators in the United States (U.S.), by answering: What elements constitute the perspectives of three L1-Spanish/L2-English CLD high achievers on the relevance of their biliteracy experience in order to become educators in the U.S.?; What factors do these three L1-Spanish/L2-English CLD high achievers perceive as key to describe their biliteracy experience?; What relevance, if any, do these three L1-Spanish/L2-English CLD high achievers perceive their biliteracy experience had for them to become …

Cause-Related Controversy: An Analysis Of Corporate Sponsor Response To The Susan G. Komen/Planned Parenthood Crisis, Christina Maria Cameron

USF Tampa Graduate Theses and Dissertations

ABSTRACT

This qualitative study advances crisis communication and relationship management application and theory by examining the crisis response strategies used by corporations during a time of crisis involving a nonprofit partner. A qualitative content analysis was performed on the Facebook pages of 57 companies that were corporate partners of Susan G. Komen in early 2012. Nineteen companies responded using their Facebook accounts during two crisis periods studied. The researcher argues that consideration must be given to additional contingent factors beyond those proposed by situational crisis communication theory. Contingent variables related to the corporations' relationship with the charity, including level of …

Desert In The Springs: Ethnography Of A Food Desert, Margeaux Alana Chavez

USF Tampa Graduate Theses and Dissertations

"Food desert" commonly describes food insecure areas with few fresh food outlets. Though used in a number of sources, the definition of "food desert" remains largely undeveloped and research is often deficit oriented, failing to account for community assets that may exist within food deserts but are underutilized or under-supported. Using an assets-based, ethnographic approach, this study combines GIS and survey methodology with participant observation and qualitative interviews to assess the potential positive effect of urban agriculture on food accessibility in Sulphur Springs, a USDA identified urban food desert in Tampa, Florida.

Ethnographic data suggest that within this neighborhood, residents …

Counselor Discomfort With Sexual Issues And Supervisory Role, Barbara Lofrisco

USF Tampa Graduate Theses and Dissertations

ABSTRACT

Sexual issues are common among the general population; therefore it is likely that clients suffer with them whether or not they are presenting issues. Because unresolved sexual issues may contribute to harm, counselors have an ethical obligation to ensure these issues are addressed during therapy. Yet, many fail to do so for a variety of reasons. Because clinical supervisors are in a unique position to nurture and mentor novice counselors, their influence is salient to this issue.

Although some research has been done to address this issue, results are inconclusive and somewhat contradictory. This study attempts to fill in …

A Polarizable And Transferable Carbon Dioxide Potential For Materials Simulation, Ashley Lynn Mullen

USF Tampa Graduate Theses and Dissertations

Intermolecular potential energy functions for CO₂ have been developed from first principles for use in heterogeneous systems, including one with explicit polarization. The intermolecular potentials have been expressed in a transferable form and parameterized from nearly exact electronic structure calculations. Models with and without explicit many-body polarization effects, known to be important in simulation of interfacial processes, are constructed. The models have been validated on pressure-density isotherms of bulk CO₂ and adsorption in three metal-organic framework (MOF) materials. The present models appear to offer advantages over high quality fluid/liquid state potentials in describing CO₂ interactions in interfacial …

Assessing Appropriate Technology Handwashing Stations In Mali, West Africa, Colleen Claire Naughton

USF Tampa Graduate Theses and Dissertations

Proper hand hygiene is the most effective and efficient method to prevent over 1.3 million deaths annually from diarrheal disease and Acute Respiratory Infections (ARIs). Hand hygiene is also indispensable in achieving the fourth Millennium Development Goal (MDG) to reduce the childhood mortality rate by 2/3rds between 1990 and 2015. Handwashing has been found in a systematic review of studies to reduce diarrhea by 47%#37; and is, thus, capable of preventing a million deaths (Curtis et. al., 2003). Despite this evidence, hand washing rates remain seriously low in the developing world (Scott et al., 2008).

This study developed and implemented …

Weather Patterns Associated With Green Turtle Hypothermic Stunning Events In St. Joseph Bay And Mosquito Lagoon, Florida, Kelsey Roberts

USF Tampa Graduate Theses and Dissertations

January of 2010 brought record-breaking cold temperatures to Florida. Such freeze events can upset vulnerable populations of marine life and other species that rely on stable water temperatures. Sea turtles are one group of species that are particularly susceptible to abrupt drops in water temperature. When water temperatures drop below 10°C, a mass hypothermic stunning, or cold-stunning, event for sea turtles can be expected, with many debilitated turtles washing onshore with a very limited time window to be rehabilitated (Foley et al. 2007). The species of sea turtle that appears to cold-stun with the most frequency is the green turtle, …

Attitude Toward Digital And Print-Based Reading: A Survey For Elementary Students, Diedre D. Allen

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to create a valid and reliable survey to measure third through fifth grade students' attitudes toward reading across three mediums: print, e-reader, and Internet. The theoretical framework pulls from self-determination theory and affective models to guide the development of a survey intended for use with intermediate elementary students. The Attitude Toward Reading Survey (ATRS) was developed and field-tested, revised, and field-tested again. Data analysis included confirmatory and exploratory factor analysis, Cronbach's alpha reliability, and cumulative logit modeling. The results indicate the survey is a reliable and valid tool for teachers to use. The ATRS …

Factors Related To The Professional Management Of Early Breastfeeding Problems: Perspectives Of Lactation Consultants, Erica Hesch Anstey

USF Tampa Graduate Theses and Dissertations

Addressing the sub-optimal breastfeeding initiation and duration rates has become a national priority. Inadequate support for addressing early breastfeeding challenges is compounded by a lack of collaboration between providers such as lactation professionals, nurses, pediatricians, and the family. The purpose of this exploratory study was to understand International Board Certified Lactation Consultants' (IBCLCs) perceived barriers to managing early breastfeeding problems. This qualitative study was guided by the symbolic interactionist framework through a grounded theory methodological approach. In-depth interviews were conducted with 30 IBCLCs from across Florida. IBCLCs were from a range of practice settings, including hospitals, WIC clinics, private practice, …

The Relationship Between Attitudes And Perspectives Of American Sign Language University Students Towards Deaf People, Beth Lilessie Cagle Brightman

USF Tampa Graduate Theses and Dissertations

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Analytical Modeling, Perturbation Analysis And Experimental Characterization Of Guided Surface Acoustic Wave Sensors, Onursal Onen

USF Tampa Graduate Theses and Dissertations

In this dissertation, guided surface acoustic wave sensors were investigated theoretically and experimentally in detail for immunosensing applications. Shear horizontal polarized guided surface acoustic wave propagation for mass loading sensing applications was modeled using analytical modeling and characterized by perturbation analysis. The model verification was performed experimentally and a surface acoustic wave immunosensor case study was presented. The results of the immunosensing were also investigated using the perturbation analysis.

Guided surface acoustic wave propagation problem was investigated in detail for gravimetric (or mass loading) guided wave sensors, more specifically for immunosensors. The analytical model was developed for multilayer systems taking …

Framing Colombian Women's Beliefs, Values And Attitude Towards Sex And Sexual High-Risk Behaviors, Rosa Ore

USF Tampa Graduate Theses and Dissertations

Hispanic immigrants constitute the largest and fastest growing groups of minorities in the United States. According to the 2010 Census, there are 50.5 million Hispanics in the United States, making up 16.3% of the total population (Passel, Cohn & Lopez, 2011). Furthermore, the state of Florida is home to 4,223,806 Hispanics (U.S. Census Bureau, 2010). Because the Hispanic population continues to grow, it is important to study their sexual health behaviors because diseases linked to risky sexual behaviors account for approximately 20,000 U.S. deaths each year, and are linked to a number of adverse reproductive outcomes (Abraido-Lanza, Chao, & Florez, …

Gradients In Season, Latitude, And Sea Ice: Their Effect On Metabolism And Stable Isotopic Composition Of Antarctic Micronekton, Erica H. Ombres

USF Tampa Graduate Theses and Dissertations

Respiration, metabolic enzyme assays, and body composition parameters were measured in the Antarctic krill Euphausia superba during the summer, fall and winter on the Western Antarctic Peninsula (WAP). E. superba of all sizes decrease their metabolism from the summer to the winter. These same parameters were also measured along the WAP during the austral fall 2010. E. superba's enzyme activity indicated that there was a latitudinal gradient to the decline in metabolism along the WAP with the more northerly sites having significantly higher metabolic enzyme activities than the sites to the south.

Carbon (δ¹³C) and nitrogen (δ^{15 …}

Navigation And Immersion Of The American Identity In A Foreign Culture To Emergence As A Culturally Relative Ambassador, Lee H. Rosen

USF Tampa Graduate Theses and Dissertations

Abstract

Globalization is forcing many American college students to re-evaluate their perspective on foreign travel. If they are offered an opportunity to improve their cultural relativity skill set by immersing themselves into a new culture, the more astute students might choose to embark on that journey especially if it would result in resume enhancement. This paper focuses upon a group of twelve community college students' cross-cultural experiences, navigation techniques, and adaptation methods as student interns teaching conversational English in Changchun, China for a period of nine to thirteen weeks in spring 2011. Several areas of interest emerged from their experiences …

Collecting Stardust: Matter, Memory, And Trauma In Patricio Guzman's Nostalgia For The Light, Nora Szegvari

USF Tampa Graduate Theses and Dissertations

This work situates Patricio Guzmàn's Nostalgia for the Light in the broader field of essay documentary film and unveils it as a locus of discursive resistance and the generative crux of diverse conventionally isolated academic dialogues. In doing so, it addresses the challenging and controversial questions of historical meaning-making, remembrance and oblivion, melancholia and mourning. My thesis also endeavors to detect the dynamic and anxiety-inducing threshold between singularity and collectivity, and the human and the cosmic. I lay the historically unprecedented common ground for trauma theory and the essayistic comportment and argue that bearing the clash of time planes, paradoxicality, …

"When You Tell Them, Your Secret Is Out There": Experiences Of Sexuality And Intimacy Among Hiv Positive Black Women, Mackenzie Rae Tewell

USF Tampa Graduate Theses and Dissertations

HIV/AIDS infections disproportionately impact African Americans within the United States. In 2010, black Americans made up 12 percent of the United States population, yet accounted for 44 percent of new HIV/AIDS infections (Kaiser Family Foundation 2013). The majority of black women (85 percent) are infected with the virus through heterosexual contact, meaning it is critical examine their sexual lives in order to gain insight into this infection within this population (CDC 2011b). Through semi-structured interviews at a Tampa, Florida AIDS service organization, this study presents the experiences of sexuality and intimacy among HIV positive black women. Results demonstrate that HIV …

Phenotypic And Genotypic Analysis Of In Vitro Selected Miltefosine Resistant Leishmania Donovani, Brian A. Vesely

USF Tampa Graduate Theses and Dissertations

Abstract

Visceral leishmaniasis is a devastating neglected parasitic disease caused by infection with Leishmania donovani. It life cycle has two stages with promastigote (insect stage) and amastigote (animal stage) morphologies. Miltefosine is currently the only commercially available oral drug available to treat leishmaniasis and recent evidence suggests clinical resistance has emerged. Due to the importance of this drug and the scarcity of new drugs in the pipeline, work has been done on understanding the mechanism(s) of miltefosine, yet the mechanism of action for resistance is still not known.

In previous studies investigators generated miltefosine resistance on the insect vector stage …

Comparative Political Corruption In The United States: The Florida Perspective, Andrew Jonathon Wilson

USF Tampa Graduate Theses and Dissertations

Political corruption is a cancer - a malignant phenomenon that affects every political system and every person in the world. Corruption undermines the very fabric of society and the faith of people in their government. It makes goods more expensive, stymies development in developing nations, and it makes both the United States and the world a more dangerous place. Because of its negative effects and universality, corruption should be studied. Its study leads to greater understanding, the discovery of effective approaches to prevention, and restored faith in political systems. Its study also illuminates and breaks down barriers to effective government …

The Choir Books Of Santa Maria In Aracoeli And Patronage Strategies Of Pope Alexander Vi, Maureen Elizabeth Cox

USF Tampa Graduate Theses and Dissertations

This study examines painted leaves and fragments that were extracted from a set of choir books created in the last decade of the fifteenth century for the basilica of Santa Maria in Aracoeli in Rome. These remnants are currently housed within various library and museum collections throughout Europe and the United States. The set is agreed upon generally by scholars to have been commissioned by Alexander VI (Rodrigo Borgia, 1431-1503), who was pope from 1492 to 1503, as a gift to the church during his time as pontiff. The choir books for Santa Maria in Aracoeli contain the bulk of …