Digital Commons Network^™

Characterization Of The Electromagnetic Fields Inside A Wire Mesh Cage For Biotelemetry, Johnny Bernard Lienau

Master's Theses (2009 -)

A wire mesh cage composed of thin conductive wires will influence the behavior of electromagnetic fields within it. Theory suggests that the cage will behave like a low Q cavity. Many researchers have investigated electromagnetic field behavior in solid walled cavities and waveguides, but little of this work has probed into the effects of a wire mesh. Additionally, few studies have investigated RF communication in these types of environments. The primary goal of this work is to research wireless communication inside a low Q wire mesh cavity in the 200-700 MHz range. Through simulated and experimental results, ideal antenna locations …

Numerical Modeling Of Hemodynamics In The Thoracic Aorta And Alterations By Dacron Patch Treatment Of Aortic Coarctation, Ronak Jashwant Dholakia

Master's Theses (2009 -)

Coarctation of the aorta (CoA) is a major congenital heart disease, characterized by a severe stenosis of the proximal descending thoracic aorta. Traditionally, surgery has been the treatment of choice for CoA. Dacron patch aortoplasty gained increased popularity after its introduction in the mid-twentieth century due to its advantages over other surgical treatment methods available at the time. A major complication with Dacron patch aortoplasty has been the formation of late aneurysm with as much as 51% incidence reported in follow up studies. The change in aortic morphology and formation of aneurysms after Dacron patch surgery could lead to local …

Isolation And Dependency Resolution Of Presentation, Processing And Persistence, Mehrab Monjur

Master's Theses (2009 -)

For business application development it is important to isolate programming efforts of the concerns: Presentation, Processing and Persistence. Development of each of these concerns has an independent thinking process and requires somewhat different programming languages and development tools. In order to isolate the concerns, we provide passages between the concerns and control the flow of execution by following essentially three rules: 1. Presentation and Processing are coroutines, 2. Processing is finished before Presentation can begin to show output, and 3. Persistence is a subsystem of Processing. We explain how these rules come to existence, and what the implications are in …

Design, Synthesis And Study Of The Bridged And Cofacially-Arrayed Poly-P-Phenylene Molecular Wires, Matthew J. Modjewski

Master's Theses (2009 -)

Two novel series of bridged and cofacially-arrayed poly-p-phenylenes have been designed synthesized and studied. The bridged poly-p-phenylenes have been synthesized from a readily available diacetylenic precursor utilizing three high yielding steps, and their structures were determined by 1H/13C NMR spectroscopy as well as X-ray crystallography. The racemization barrier between the two atropoisomers was found to be ~12 Kcal mol-1; the versatility of the synthesis employed was extended to synthesis a triply bridged tetra-p-phenylene and a quadruply bridged penta-p-phenylene.

The cofacially-arrayed poly-p-phenylenes have shown that the X-ray crystal structures of the neutral compounds are largely dominated by C-H--π-interactions interactions while the …

Quirky, Not Quacky: Quantum Computing For Librarians, Jill Cirasella

Publications and Research

This slideshow introduces librarians and non-scientists to the relatively young field of quantum computing.

A Stochastic Simulation Of The North Dakota Ethanol Production Incentive, Andrew Hamilton Kurth

Agribusiness and Applied Economics

The objective of this research is to determine the effect the North Dakota Ethanol Production Incentive has on ethanol plant survivability. This thesis uses a stochastic simulation to show the financial performance of an ethanol plant with and without subsidy support. Historical corn and ethanol prices are used to simulate market conditions a typical ethanol might face. Using the forecast prices, an ethanol plant balance sheet was created to show how a plant would perform in normal market conditions, as well as how the plant would perform with the Ethanol Production Incentive and also with alternative subsidy structures that were …

The Impacts Of Expected Structural Changes In Demand For Agricultural Commodities In China And India On World Agriculture, Alyssa Tangen

Agribusiness and Applied Economics

The objective of this study is to evaluate the changes in import and export demand in China and India on the United States and global agriculture in 2018. A spatial equilibrium model is developed to optimize production and trade in China, India, and other major importing and exporting regions in the world. This research focuses on four primary crops: wheat, com, rice and soybeans. In the model China and India are divided into 31 and 14 producing and consuming regions, respectively. The model also includes five exporting countries and ten importing countries/regions. The results indicate that India will be able …

Nano-Structure Formation Driven By Local Protonation Of Polymer Thin Films, Carsten Maedler, Harald Graaf, Mingdi Yan, Andres H. La Rosa

Physics Faculty Publications and Presentations

We report the creation of nano-structures via Dip Pen Nanolithography by locally exploiting the mechanical response of polymer thin films to an acidic environment. Protonation of cross linked poly(4-vinylpyridine) (P4VP) leads to a swelling of the polymer. We studied this process by using an AFM tip coated with a pH 4 buffer. Protons migrate through a water meniscus between tip and sample into the polymer matrix and interact with the nitrogen of the pyridyl group forming a pyridinium cation. The increase in film thickness, which is due to Coulomb repulsion between the charged centers, was investigated using Atomic Force Microscopy. …

Crystallography Open Database – An Open-Access Collection Of Crystal Structures, Saulius Grazulis, Daniel Chateigner, Robert T. Downs, A. F. T. Yokochi, Miguel Quirós, Luca Lutterotti, Elena Manakova, Justas Butkus, Peter Moeck, Armel Le Bail

Physics Faculty Publications and Presentations

The Crystallography Open Database (COD), which is a project that aims to gather all available inorganic, metal–organic and small organic molecule structural data in one database, is described. The database adopts an openaccess model. The COD currently contains 80,000 entries in crystallographic information file format, with nearly full coverage of the International Union of Crystallography publications, and is growing in size and quality.

Precession Electron Diffraction And Its Advantages For Structural Fingerprinting In The Transmission Electron Microscope, Peter Moeck, Sergei Rouvimov

Physics Faculty Publications and Presentations

The foundations of precession electron diffraction in a transmission electron microscope are outlined. A brief illustration of the fact that laboratory-based powder X-ray diffraction fingerprinting is not feasible for nanocrystals is given. A procedure for structural fingerprinting of nanocrystals on the basis of structural data that can be extracted from precession electron diffraction spot patterns is proposed.

Paraprofessionals Who Work With Elementary Grade Students With Significant Disabilities In Inclusive Settings, Regina Moreno

Dissertations and Theses

The use of paraprofessional services is an established and crucial aspect in the pursuit of a free and appropriate public education for students with disabilities. Paraprofessionals are often the primary providers of instruction for students with severe disabilities yet are the least trained instructional personnel in schools. Identified competencies and necessary training content for paraprofessionals who serve students with severe disabilities are nearly absent in the professional literature.

This study extended the current literature regarding paraprofessionals who serve students with disabilities in public schools by focusing specifically on those paraprofessionals who serve students with severe disabilities in inclusive general education …

Quantitative Imaging Of Scattering Changes Associated With Epithelial Proliferation, Necrosis And Fibrosis In Tumors Using Microsampling Reflectance Spectroscopy, Venkataramanan Krishnaswamy, P Jack Hoopes, Kimberley S. Samkoe, Julia A. O'Hara, Tayyaba Hasan, Brian W. Pogue

Dartmouth Scholarship

Highly localized reflectance measurements can be used to directly quantify scatter changes in tissues. We present a microsampling approach that is used to raster scan tumors to extract parameters believed to be related to the tissue ultrastructure. A confocal reflectance imager was developed to examine scatter changes across pathologically distinct regions within tumor tissues. Tissue sections from two murine tumors, AsPC-1 pancreas tumor and the Mat-LyLu Dunning prostate tumor, were imaged. After imaging, histopathology-guided region-of-interest studies of the images allowed analysis of the variations in scattering resulting from differences in tissue ultra-structure. On average, the median scatter power of tumor …

Non-Linearity In Ecosystem Services: Temporal And Spatial Variability In Coastal Protection, Evamaria W. Koch, Edward Barbier, Brian R. Silliman, Denise J. Reed, Gerardo M. E. Perillo, Sally D. Hacker, Elise F. Granek, Jurgenne H. Primavera, Nyawira Muthiga, Stephen Polasky, Benjamin S. Halpern, Christopher J. Kennedy, Carrie V. Kappel, Eric Wolanski

Institute for Sustainable Solutions Publications and Presentations

Natural processes tend to vary over time and space, as well as between species. The ecosystem services these natural processes provide are therefore also highly variable. It is often assumed that ecosystem services are provided linearly (unvaryingly, at a steady rate), but natural processes are characterized by thresholds and limiting functions. In this paper, we describe the variability observed in wave attenuation provided by marshes, mangroves, seagrasses, and coral reefs and therefore also in coastal protection. We calculate the economic consequences of assuming coastal protection to be linear. We suggest that, in order to refine ecosystem-based management practices, it is …

Planetary Boundaries: Exploring The Safe Operating Space For Humanity, Johan Rockström, W. L. Steffen, Kevin Noone, Åsa Persson, F. Stuart Chapin Iii, Eric Lambin, Timothy M. Lenton, Marten Scheffer, Carl Folke, Hans Joachim Schellnhuber, Björn Nykvist, Cynthia A. De Wit, Terry Hughes, Sander Van Der Leeuw, Henning Rodhe, Sverker Sörlin, Peter K. Snyder, Robert Costanza, Uno Svedin, Malin Falkenmark, Louise Karlberg, Robert W. Corell, Victoria J. Fabry, James Hansen, Brian Walker, Diana Liverman, Katherine Richardson, Paul Crutzen, Jonathan Foley

Institute for Sustainable Solutions Publications and Presentations

Anthropogenic pressures on the Earth System have reached a scale where abrupt global environmental change can no longer be excluded. We propose a new approach to global sustainability in which we define planetary boundaries within which we expect that humanity can operate safely. Transgressing one or more planetary boundaries may be deleterious or even catastrophic due to the risk of crossing thresholds that will trigger non-linear, abrupt environmental change within continental- to planetary-scale systems. We have identified nine planetary boundaries and, drawing upon current scientific understanding, we propose quantifications for seven of them. These seven are climate change (CO2 concentration …

A Hypergraph Regularity Method For Linear Hypergraphs, Shoaib Amjad Khan

USF Tampa Graduate Theses and Dissertations

Szemerédi's Regularity Lemma is powerful tool in Graph Theory, yielding many applications in areas such as Extremal Graph Theory, Combinatorial Number Theory and Theoretical Computer Science. Strong hypergraph extensions of graph regularity techniques were recently given by Nagle, Rödl, Schacht and Skokan, by W.T. Gowers, and subsequently, by T. Tao. These extensions have yielded quite a few non-trivial applications to Extremal Hypergraph Theory, Combinatorial Number Theory and Theoretical Computer Science. A main drawback to the hypergraph regularity techniques above is that they are highly technical. In this thesis, we consider a less technical version of hypergraph regularity which more directly …

Finding Confucianism In Scientology: A Comparative Analysis, John Albert Kieffer

USF Tampa Graduate Theses and Dissertations

Scientology holds considerable interest for scholars of new religious movements. As such, this study aims to contribute new data and insight to ongoing theoretical work within this area of religious studies scholarship. Engaged in this inquiry are the similarities between Scientology, the new religious movement founded in 1951 by L. Ron Hubbard (1911-1986), and the Chinese religion, Confucianism, which originates with the teachings of Confucius (551-479 BCE). Though Hubbard admits being influenced by eastern thinking such as Buddhism and Daoism in shaping his worldview, he specifically discounts Confucius as relevant in this regard. However, through comparisons between Scientology and Confucianism, …

Numerical Heat Transfer During Partially–Confined, Confined, And Free Liquid Jet Impingement With Rotation And Chemical Mechanical Planarization Process Modeling, Jorge C. Lallave-Cortes

USF Tampa Graduate Theses and Dissertations

No abstract provided.

Multiple Approaches To The Validation Of The Scores From The Study Anxiety Inventory, George Douglas Lunsford

USF Tampa Graduate Theses and Dissertations

The Study Anxiety Inventory (SAI), consisting of the factors of worry and emotionality, was developed to measure college students' self-reported levels of anxiety while studying for an exam. Data from 2002 undergraduate students from four colleges (Arts and Sciences, Engineering, Business, and Education) at a southeastern state university were used to evaluate the validity of the scores from the 16-item Study Anxiety Inventory. Results of confirmatory factor analyses for the two factor model, conducted separately for each college, indicated marginally acceptable fit for the data (median fit measures across the four colleges: CFI =.915, SRMR=.049, RMSEA=.098), a pattern that was …

Mixture Distributions With Application To Microarray Data Analysis, O'Neil Lynch

USF Tampa Graduate Theses and Dissertations

The main goal in analyzing microarray data is to determine the genes that are differentially expressed across two types of tissue samples or samples obtained under two experimental conditions. In this dissertation we proposed two methods to determine differentially expressed genes. For the penalized normal mixture model (PMMM) to determine genes that are differentially expressed, we penalized both the variance and the mixing proportion parameters simultaneously. The variance parameter was penalized so that the log-likelihood will be bounded, while the mixing proportion parameter was penalized so that its estimates are not on the boundary of its parametric space. The null …

Photography’S Creative Influence On Lewis Carroll’S Alice’S Adventures In Wonderland And Through The Looking Glass And What Alice Found There, Bridget Mahoney

USF Tampa Graduate Theses and Dissertations

Lewis Carroll's novels Alice's Adventures in Wonderland and Through the Looking Glass and What Alice Found There share many characteristics with the author's photographs. Both Carroll's portraits and literature utilize dreamlike imagery to move beyond the present time and space into a dream world. The similar imagery demonstrates an important creative link between Carroll's novels and photographs. The creation of Carroll's masterpiece, Alice's Adventures in Wonderland and its sequel, Through the Looking Glass and What Alice Found There, creatively depended on the photographic images Carroll produced. Utilizing the four step process of creativity generally accepted by psychologists, Carroll's photographs are …

Teaching Social Studies In An Age Of Globalization: A Case Study Of Secondary Social Studies Teachers’ Participation In The Una-Usa’S Global Classrooms Curriculum Program, Kelly R. Miliziano

USF Tampa Graduate Theses and Dissertations

The researcher found few studies that explore decisions of social studies teachers as they plan what and how to teach their classes. Over a century, social studies educators have adapted and responded to political, social, and economic changes. From educating immigrants a century earlier to addressing contemporary cross-border issues, social studies educators inherit unique challenges in today's increasingly globalized world. In addition to these external forces, constraints are placed on teachers which prescribe what content must be included in an already crowded curriculum. This qualitative approach using a case study provides a better understanding of the influence a globally oriented …

Characterization Of Electrowetting Systems For Microfluidic Applications, Pradeep K. Mishra

USF Tampa Graduate Theses and Dissertations

Electrowetting is the change in apparent surface energy in the presence of an electric field. Recently, this phenomenon has been used to control the shape and location of individual droplets on a surface. However, many microfluidics researchers have acknowledged unexplained behaviors and performance degradation. In this work, electrowetting systems are characterized with different methods. The electrowetting response is measured by measuring contact angle for different applied voltages. A novel technique for direct measurement of Electrowetting Force (EWF) using nano indenter is proposed in this work. The EWF measurements show that, for aqueous solution the EWF is more as compared to …

Gallium Nitride Sensors For Hydrogen/Nitrogen And Hydrogen/Carbon Monoxide Gas Mixtures, Christopher Nicholas Monteparo

USF Tampa Graduate Theses and Dissertations

As hydrogen is increasingly used as an energy carrier, gas sensors that can operate at high temperatures and in harsh environments are needed for fuel cell, aerospace, and automotive applications. The high temperature Fischer-Tropsch process also uses mixtures of hydrogen and carbon monoxide to generate synthetic fuels from non-fossil precursors. As the Fischer-Tropsch process depends upon particular gas mixtures to generate various fuels, a sensor which can determine the proper ratio of reactants is needed. To this end, gallium nitride (GaN) has been used to fabricate a resistive gas sensor. GaN is a suitable semiconductor to be used in hydrogen …

Ecis Assessment Of Cytotoxicity And Trans-Endothelial Migration Of Metastatic Cancer Cells, Daniel Opp

USF Tampa Graduate Theses and Dissertations

The investigations conducted within this dissertation centers around the use of electric cell-substrate impedance sensing (ECIS). This system is able to characterize in real-time analysis, the adhesion of cells to their substrate and neighboring cells. With this, valuable information can be gathered with in-vitro experiments regarding a tissue culture's response to physiological stimulation. This dissertation has taken advantage of ECIS' ability to analyze toxicology, barrier function, and cancer invasion on a tissue culture. With proper analysis modifications, trans-epethelial resistance (TER) can be used as a cytotoxicity assay with higher sensitivity than previously thought. In vitro assessment of cytotoxicity based on …

Exploring Efficient Design Approaches For Display Of Multidimensional Data To Facilitate Interpretation Of Information, Chitra S. Pathiavadi

USF Tampa Graduate Theses and Dissertations

Prescriptions for effective display of quantitative information involving more than two variables are not available. To explore the effectiveness of retinal variables in facilitating the interpretation of information and decision making when used in conjunction, a study with 135 participants was conducted. The study involved the use of color shape, color value, and value shape as retinal variables in interactive displays that required participants to answer nine questions in three levels of complexity (identification of data points, analyses of local comparisons and global trends). Time-on-task scores and performance scores were measured. In addition, a View Clamp eye tracker system was …

An Explanatory Examination Of Relationships Between Measures Of School And Student Socioeconomic Status And Reading And Math Achievement Of Hispanic Limited English Proficient (Lep) High School Students, Osvaldo Piedra

USF Tampa Graduate Theses and Dissertations

Hispanics are the largest and fastest growing minority population in the U.S. requiring limited English proficiency services (Guglielmi, 2008). Many schools and school districts place heavy emphasis on high stakes testing. The No Child Left Behind (NCLB) Act of 2001 requires all children to have access to a fair, equal, and high-quality education. Many schools and school districts focus on individual students to show grade level performance for small populations such as limited English proficient (LEP) students. The purpose of this study was to examine the question, "What was the relationship between measures of school and student socioeconomic status, and …

Digital Holography Applications In Ophthalmology, Biometry, And Optical Trapping Characterization, Mariana Camelia Potcoava

USF Tampa Graduate Theses and Dissertations

This dissertation combines various holographic techniques with application on the two- and three-dimensional imaging of ophthalmic tissue, fingerprints, and microsphere samples with micrometer resolution. Digital interference holography (DIH) uses scanned wavelengths to synthesize short-coherence interference tomographic images. We used DIH for in vitro imaging of human optic nerve head and retina. Tomographic images were produced by superposition of holograms. Holograms were obtained with a signal-to-noise ratio of approximately 50 dB. Optic nerve head characteristics (shape, diameter, cup depth, and cup width) were quantified with a few micron resolution (4.06 -4.8 microns). Multiple layers were distinguishable in cross-sectional images of the …

Cocrystals Of Nutraceuticals: Protocatechuic Acid And Quercetin, Twarita Anil Pujari

USF Tampa Graduate Theses and Dissertations

The cocrystallization of two or more pure compounds by crystal engineering to create a new functional material is of a great academic and industrial interest. Pharmaceutical cocrystallization has allured a lot of attention by means of altering the physicochemical properties of Active Pharmaceutical Ingredient (API) such as solubility, stability and bioavailability. Crystal engineering of nutraceuticals can produce novel compounds such as pharmaceutical cocrystals. To establish the importance of nutraceutical cocrystallization and its use; polyphenols, a major class of nutraceuticals and potential disease preventing agents, are the appropriate targets. The work herein focuses on two polyphenols, protocatechuic acid and quercetin, which …

Determination Of Nanogram Mass And Measurement Of Polymer Solution Free Volume Using Thickness-Shear Mode (Tsm) Quartz Resonators, Anthony James Richardson

USF Tampa Graduate Theses and Dissertations

More commonly referred to as a quartz crystal microbalance (QCM), thickness-shear mode (TSM) quartz resonator devices utilize an acoustic wave to establish a bulk-detection mechanism prompting their utilization as gravimetric sensors with nanogram mass sensitivity and capability to measure various film property dynamics, due to variations in the system environment, of thin-films that are uniformly distributed across the resonator surface. The development of an absolute TSM-based nanobalance and an experimental technique using conventional TSM resonators for the real-time measurement of the change in the viscoelastic shear modulus and fractional free-hole volume of a poly(isobutylene) film due to the sorption of …

Calculating The Volume Of The May 18, 1980 Eruption Of Mount St. Helens, Dâvid Nuñez Wickham

Environmental Science and Management Professional Master's Project Reports

The May 18, 1980 eruption of Mount St. Helens created a massive amount of sediment and debris, thought to be as much as 5.5 billion cubic yards. This sediment causes infill of river stretches and collects along levees protecting southwest Washington State. The sediment must be removed to ensure these areas do not flood. The US Army Corps of Engineers (USACOE) is tasked with flood protection for southwest Washington State and the levees protecting the cities of Castle Rock, Lexington, Kelso, and Longview. The Sediment Retention Dam, opened in 1989 is able to filter out larger particulate but fine grain …