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Polyethylene Oxide Hydration In Solutions, Nanoconfinement And Nanostructures, Udaya Dahal

Doctoral Dissertations

Amphiphilic water-soluble polymers are actively used in designing novel nanomaterials and have been the subject of extensive experimental and simulation studies. Polyethylene oxide (PEO) is a water soluble, biocompatible, non-toxic synthetic polymer capable of preventing protein adsorption which is widely used in industry and biomedicine for protein crystallization, control of particle aggregation and drug delivery. Most of the applications of PEO and PEO-based nanoparticles are utilized in an aqueous environment as PEO is highly soluble in water due to its ability to form hydrogen bonds with water and therefore understanding the role of water on the conformation and dynamics of …

Cultural Values And Romantic Relationship Satisfaction In Mexican Adolescents: The Moderating Effects Of Parental Psychological Control And Gender, Alexander Reid

Doctoral Dissertations

Guided by a developmental contextual (Chen & Rubin, 2011; Ford & Lerner, 1992) and Collins’s (2003) five-feature framework on adolescent romantic relationships, the goal of this study was to examine whether perceived mothers’ and fathers’ psychological control and gender moderated the associations between cultural values (i.e., machismo, caballerismo, views of female virginity) and romantic relationship satisfaction in Mexican adolescents. Self-report survey data collected from 214 adolescents (M = 14.59 years old; 50.5% girls) from two public schools in Mexico reported on their age, gender, endorsement of cultural values (i.e., machismo, caballerismo, views of female virginity), perceived parental psychological control, …

Marital Violence And Fertility In A Relatively Egalitarian High-Fertility Population, Jonathan Stieglitz, Benjamin C. Trumble, Hillard Kaplan, Michael Gurven

ESI Publications

Ultimate and proximate explanations of men’s physical intimate partner violence (IPV) against women have been proposed. An ultimate explanation posits that IPV is used to achieve a selfish fitness-relevant outcome, and predicts that IPV is associated with greater marital fertility. Proximate IPV explanations contain either complementary strategic components (for example, men’s desire for partner control), non-strategic components (for example, men’s self-regulatory failure), or both strategic and non-strategic components involving social learning. Consistent with an expectation from an ultimate IPV explanation, we find that IPV predicts greater marital fertility among Tsimané forager-horticulturalists of Bolivia (n = 133 marriages, 105 women). This …

Système, Trupti Pomaje

Theses

In today’s throwaway world, the rate at which and the amount of goods that are getting discarded has developed an alarming situation. Electronic industry has evolved rapidly since the invention of transistors in 1947. From these days onwards, efforts have been taken to make the products more efficient in terms of their performance, reduce design and production cost and have higher profit margins. However, this has led to products being designed in a way which makes people want to dispose them early, in turn making them part of waste after usage. Electronic products contain certain materials and components which are …

Node-Based Resilience Measure Clustering With Applications To Noisy And Overlapping Communities In Complex Networks, John Matta, Tayo Obafemi-Ajayi, Jeffrey Borwey, Koushik Sinha, Donald C. Wunsch, Gunes Ercal

Electrical and Computer Engineering Faculty Research & Creative Works

This paper examines a schema for graph-theoretic clustering using node-based resilience measures. Node-based resilience measures optimize an objective based on a critical set of nodes whose removal causes some severity of disconnection in the network. Beyond presenting a general framework for the usage of node-based resilience measures for variations of clustering problems, we experimentally validate the usefulness of such methods in accomplishing the following: (i) clustering a graph in one step without knowing the number of clusters a priori; (ii) removing noise from noisy data; and (iii) detecting overlapping communities. We demonstrate that this clustering schema can be applied successfully …

Genetic Diversity In An Invasive Clonal Plant? A Historical And Contemporary Perspective, Elliot D. Weidow

LSU New Orleans Theses and Dissertations

Introduced populations of Eichhornia crassipes (Pontederiaceae) possess extremely low levels of genetic diversity due to severe bottleneck events and clonal reproduction. While populations elsewhere have been well studied, North American populations of E. crassipes remain understudied. We used Amplified Fragment Length Polymorphism markers to assess genetic diversity and population structure in North American E. crassipes populations. Patterns of diversity over the past fifty years were analyzed using herbarium specimens. Furthermore, we sampled populations across the Gulf Coast of the United States throughout a year to determine contemporary genetic diversity and assess potential seasonal effects. Genetic diversity was found to be …

Generalizing Multistage Partition Procedures For Two-Parameter Exponential Populations, Rui Wang

LSU New Orleans Theses and Dissertations

ANOVA analysis is a classic tool for multiple comparisons and has been widely used in numerous disciplines due to its simplicity and convenience. The ANOVA procedure is designed to test if a number of different populations are all different. This is followed by usual multiple comparison tests to rank the populations. However, the probability of selecting the best population via ANOVA procedure does not guarantee the probability to be larger than some desired prespecified level. This lack of desirability of the ANOVA procedure was overcome by researchers in early 1950's by designing experiments with the goal of selecting the best …

Characterization Of Genes Involved In The Biosynthesis Of Phycoerythrin I And Ii In Cyanobacteria, Adam Nguyen

LSU New Orleans Theses and Dissertations

Cyanobacteria are photosynthetic prokaryotes that able to produce oxygen. They have light harvesting complexes called phycobilisomes (PBS). PBS are generally composed of an allophycocyanin core with phycocyanin and phycoerythrin rods connected to the core. PBS are able to efficiently harvest light energy from different wavelengths of visible light due to the evolution of PBP. Phycoerythrin has five chromophores that are attached to six cysteine residues and is essential for efficient green light capture and transfer of energy for use in photosynthesis. The attachment of these chromophores to PBP is facilitated by enzymes known as bilin lyases.

In this study, we …

Thiophene-Based Molecular Sensors Towards The Selective Detection Of Mercury(Ii) And Other Metals, Austin Kazuo Shigemoto

Dissertations and Theses

This work describes several thiophene-based molecular sensors and various modifications aimed to improve and understand the photophysical and supramolecular properties, such as the association constant (K_a) and selectivity, towards the development of a selective mercury(II) sensor. From the first generation of sensors containing pyridine and thiophene groups, it was determined that thiophene can offer good selectivity for mercury(II) against other transition metal ions, and provide a ratiometric absorption and fluorescent response. The projects following this focused on improving the K_a of the first generation of sensors through several different strategies. Substitution of thiophene for dibenzothiophene was …

Prevalence Rates Of Arthritis Among Us Older Adults With Varying Degrees Of Depression: Findings From The 2011 To 2014 National Health And Nutrition Examination Survey, Jessica L. Brooks, Alexander J. Titus, Courtney A. Polenick, Nicole M. Orzechowski, Manney Carrington Reid, Todd A. Mackenzie, Stephen J. Bartels, John A. Batsis

Dartmouth Scholarship

Arthritis and depressive symptoms often interact and negatively influence one another to worsen mental and physical health outcomes. Better characterization of arthritis rates among older adults with different levels of depressive symptoms is an important step toward informing mental health professionals of the need to detect and respond to arthritis and related mental health complications. The primary objective is to determine arthritis rates among US older adults with varying degrees of depression. Using National Health and Nutrition Examination Survey 2011 to 2014 data (N = 4792), we first identified participants aged ≥50 years. Measures screened for depressive symptoms and …

Evidence For The Formation Of A Radical-Mediated Flavin-N5 Covalent Intermediate, Yumin Dai, Hannah Valentino, Pablo Sobrado

Chemistry Faculty Research & Creative Works

The redox-neutral reaction catalyzed by 2-haloacrylate hydratase (2-HAH) leads to the conversion of 2-chloroacrylate to pyruvate. Previous mechanistic studies demonstrated the formation of a flavin-iminium ion as an important intermediate in the 2-HAH catalytic cycle. Time-resolved flavin absorbance studies were performed in this study, and the data showed that the enzyme is capable of stabilizing both anionic and neutral flavin semiquinone species. The presence of a radical scavenger decreases the activity in a concentration-dependent manner. These data are consistent with the flavin iminium intermediate occurring by radical recombination.

Hall Ways Magazine, Georgia Southern University

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Impact Of Race And Insurance On Door-To-Appendectomy Time Among Pediatric Patients, Carla M. Lopez, Emily R. Christison-Lagay, Daniel Solomon

Journal of Health Disparities Research and Practice

Racial and ethnic disparities in the rate of appendiceal rupture have been widely reported among the pediatric population. The main reasons for this remain largely unknown given that previous explanations pointing to signs of poor health care access have recently been shown to account for only a small percentage of the difference in perforation rates between white and minority children. Because the risk of perforation increases with time, racial disparities in time delay from emergency department presentation to OR appendectomy may help account for the higher appendiceal perforation rates observed among minority children. This is the first study dedicated to …

Blood Pressure And Job Domains Among Hotel Housekeepers, Marie-Anne Sanon Rosemberg Phd, Mn, Rn, Bidisha Ghosh Ms., John Shaver Bsn, Maria Militzer Ma, Julia Seng Phd, Cnm, Faan, Marjorie C. Mccullagh Phd, Rn, Aphn-Bc, Cohn-S, Faaohn, Faan

Journal of Health Disparities Research and Practice

Hotel housekeepers have challenging working conditions, putting them at risk for poor health such as hypertension. Despite their risks, few studies have measured their blood pressure (BP). The purpose of this study was to explore hotel housekeepers’ blood pressure and the associations between work and BP. Methods: A community engagement approach was used to recruit study participants. Data sources included questionnaires, and BP measurement. Results: Over 25% of the 39 hotel housekeepers reported hypertension diagnosis and/or antihypertensive medication used. Across the job domains, job satisfaction was correlated with diastolic BP, and workload was correlated with systolic BP. There were difference …

Exploring H.Pylori Seropositivity As A Risk Factor For Type 2 Diabetes, Virginia Chaidez, Yumou Qiu

Journal of Health Disparities Research and Practice

Background: In the US, the percentage of adults with diagnosed diabetes are higher in members of racial and ethnic minority groups compared to non-Latino Whites. Understanding why such disparities exist has been less forthcoming.

Methods: Secondary data analysis was conducted using the National Health and Nutrition Examination Survey (NHANES) 1999-2000 cross-sectional data.

Results: H.pylori seropositivity was highest in Mexican Americans (43.7%), lowest in non-Hispanic Whites (18.1%). Diabetes was highest in non-Hispanic Blacks (5.9%); lowest in non-Hispanic whites (4.3%). H.pylori seropositivity was associated with greater likelihood of having type 2 diabetes (1.927, 95% CI 1.142, 3.257) compared to H.pylori negative in …

Human Papillomavirus Infections In The Southern And Other United States Regions, Dudith Pierre-Victor, Mary Jo Trepka, Dionne Stephens, Tan Li, Timothy Page, Purnima Madhivanan

Journal of Health Disparities Research and Practice

Human papillomavirus (HPV) infection is the most common sexually transmitted infection worldwide and has been linked to several cancers, including cervical cancer. In the United States, the Southern region has a disproportionate burden of cervical cancer, and research about the epidemiology of HPV in the region is scarce. This study estimates the prevalence and correlates of HPV infection among 14–59 year-old females.

Data from 4,250 females aged 14–59 years collected during the 2007–2010 National Health and Nutrition Examination Survey (NHANES) were used. We estimated the prevalence of HPV infection for the South and the rest of the country. We performed …

Inhibition Of Inflammatory Rage Signaling In Breast Cancer And Metabolic Diseases, Owen Willis

Open Access Theses

The Receptor for Advanced Glycation End-products (RAGE) is normally expressed at low levels, but is highly expressed in a variety of inflammatory states. RAGE has been implicated in pathogenic progression of cancer and various metabolic diseases, and therefore provides a potential therapeutic target in these disease states. RAGE knockout (RKO) mice are viable and display no developmental defects, suggesting therapeutic targeting of RAGE to be a viable approach. Our lab has identified two RAGE inhibitors that can be used in both in vitro and in vivo models: FPS-ZM1 (FPS) and TTP-488 (TTP). Previously, our lab has established one of these …

Toward A Blue Economy : A Pathway For Sustainable Growth In Bangladesh, Pawan G. Patil, John Virdin, Charles Colgan, M Gulam Hussain, Pierre Failler, Amaya Vega

Publications

This report aims to synthesize the current theory and practice of the blue economy concept to govern economic activity linked to the ocean, and to provide a framework for the Government of Bangladesh to analyze its potential. With the peaceful resolution of maritime boundary disputes with its neighbors in 2012 and 2014, the Government has recently defined the ocean space under its jurisdiction and prioritized its use as a key source of future economic growth. The Government has prioritized the use of these spaces as a key source of future growth. However, a number of questions remain in embarking on …

Low-Tech Riparian And Wet Meadow Restoration Increases Vegetation Productivity And Resilience Across Semiarid Rangelands, Nicholas L. Silverman, Brady W. Allred, John Patrick Donnelly, Teresa B. Chapman, Jeremy D. Maestas, Joseph Michael Wheaton, Jeff White, David E. Naugle

Watershed Sciences Faculty Publications

Restoration of riparian and wet meadow ecosystems in semiarid rangelands of the western United States is a high priority given their ecological and hydrological importance in the region. However, traditional restoration approaches are often intensive and costly, limiting the extent over which they can be applied. Practitioners are increasingly trying new restoration techniques that are more cost‐effective, less intensive, and can more practically scale up to the scope of degradation. Unfortunately, practitioners typically lack resources to undertake outcome‐based evaluations necessary to judge the efficacy of these techniques. In this study, we use freely available, satellite remote sensing to explore changes …

Nature, Place, And Story: Rethinking Historic Sites In Canada By Claire Campbell, Emma K. Morgan-Thorp

The Goose

Review of Claire Campbell's Nature, Place, and Story: Rethinking Historic Sites in Canada.

Commencement Convocation Program, St. Petersburg Campus, August 5, 2018, University Of South Florida St. Petersburg

USF St. Petersburg Graduations and Commencements

No abstract provided.

Fabrication Of Mnox/Mwcnts-Gc Nanocatalyst For Oxygen Evolution Reaction, Yaser M. Asal Mr, Islam M. Al-Akraa Dr, Amr M. Arafa Eng.

Chemical Engineering

Manganese oxide (MnOx) and multiwalled carbon nanotubes (MWCNTs) are intended to modify the GC electrode for oxygen evolution reaction (OER). Optimization of MnOx loading is carried out and the deposition of 55 cycles was sufficient to obtain the highest activity toward OER. The stability of the catalyst is enhanced by the addition of MWCNTs. As a result, an amount of 22 kWh/Kg of O₂ of energy is saved. Several techniques including cyclic voltammetry, linear sweep voltammetry, chronoamperometry, chronopotentiometry, field-emission scanning electron microscopy, and energy dispersive X-ray spectroscopy will be combined to track the catalyst activity and to determine its …

Using Expert Interviews Within Modes In Online And Offline Spaces To Extend Comprehensive Literature Review Processes, Alana Morris, Anthony J. Onwuegbuzie, Hannah R. Gerber

The Qualitative Report

In this article, we explore a 7-step process for conducting a comprehensive literature review (CLR). Specifically, after describing each of the steps, we explain the importance of expanding the search beyond traditional databases through 5 multimodal tasks that Onwuegbuzie and Frels (2016) refer to as MODES (Media, Observations, Documents, Experts, and Secondary Data), which can be undertaken separately, or which may interact with each other. Then, we highlight and provide an exemplar process for the Experts task, which motivates researchers to identify, to seek out, and to interview 1 or more experts associated with their research question(s). Furthermore, we illustrate …

Interpersonal Hardiness As A Critical Contributing Factor To Persistence Among International Women In Doctoral Programs: A Trioethnographic Study, Eraldine S. Williams-Shakespeare 2153760, Joyce E. Bronteng, Adhwaa Alahmari

The Qualitative Report

Women in PhD programs, in particular minority and international women, are especially at risk for drop-out (Castro, Garcia, Cavazos, & Castro, 2011; Haynes et al., 2012). This initial part of a longitudinal trioethnography captures the experiences of three international women in a doctoral program, highlighting the challenges, support systems, and coping mechanisms they engage with in the process of completing their degrees. Discoveries include the identification of “Interpersonal Hardiness” as the potential vehicle which could ensure our success.

A Review Of Abstract Concept Learning In Embodied Agents And Robots, A Cangelosi, F Stramandinoli

School of Engineering, Computing and Mathematics

This paper reviews computational modelling approaches to the learning of abstract concepts and words in embodied agents such as humanoid robots. This will include a discussion of the learning of abstract words such as ‘use’ and ‘make’ in humanoid robot experiments, and the acquisition of numerical concepts via gesture and finger counting strategies. The current approaches share a strong emphasis on embodied cognition aspects for the grounding of abstract concepts, and a continuum, rather than dichotomy, view of concrete/abstract concepts differences. This article is part of the theme issue ‘Varieties of abstract concepts: development, use and representation in the brain’.

Verification And Evaluation Of A Passive Intensity Modulation Device For Bolus Conformal Therapy, Elizabeth Noel Hilliard

LSU Master's Theses

Purpose: Bolus electron conformal therapy (BECT) provides effective radiation treatment for superficial cancers and other diseases close to the skin surface, but can have as great as a 30% planning target volume (PTV) dose heterogeneity due to scattering from the irregular proximal bolus surface. Intensity modulated (IM) BECT can improve PTV dose homogeneity, but is not currently available. This study fabricated patient-specific passive intensity modulators and validated their delivering planned dose distributions calculated by a modified pencil beam redefinition algorithm (PBRA).

Methods: Two test-patterns and four patient-specific intensity modulators were designed, fabricated, and tested. Dose plans were generated …

Phaeoviral Infections Are Present In Macrocystis, Ecklonia And Undaria (Laminariales) And Are Influenced By Wave Exposure In Ectocarpales, Da Mckeown, L. Joanna, Jl Schroeder, K Stevens, Et Al

School of Biological and Marine Sciences

Two sister orders of the brown macroalgae (class Phaeophyceae), the morphologically complex Laminariales (commonly referred to as kelp) and the morphologically simple Ectocarpales are natural hosts for the dsDNA phaeoviruses (family Phycodnaviridae) that persist as proviruses in the genomes of their hosts. We have previously shown that the major capsid protein (MCP) and DNA polymerase concatenated gene phylogeny splits phaeoviruses into two subgroups, A and B (both infecting Ectocarpales), while MCP-based phylogeny suggests that the kelp phaeoviruses form a distinct third subgroup C. Here we used MCP to better understand the host range of phaeoviruses by screening a further 96 …

Gw-Sat: Gw's First Satellite With Propulsive 3-Axis-Stabilization, Jonathan Kolbeck, Michael Keidar

Small Satellite Conference

The George Washington University’s proposed satellite mission, GW-Sat, was one of the 34 missions selected by NASA as part of the CubeSat Launch Initiative program. The CubeSat will be built entirely by students from different departments and schools at the university. GW-Sat is a 3 U CubeSat and its primary mission is to validate its propulsion system based on in-house built Micro-Cathode Arc Thrusters. The thrusters will be used to provide the spacecraft with 3-axis stabilization and the ability to perform station-keeping maneuvers, and therefore, increase the mission’s lifetime. In addition to this, the CubeSat will be used to perform …

Commencement Convocation Program, Usf, August 4, 2018, University Of South Florida

USF Graduation and Convocation Programs

King O'Neal Scholars - Katlyn Eastridge, James Garrett, Gautam Krishna Koipallil, Kayla Li, and Olivia Taylor; Outstanding Graduate - Barbora Skopalova; Global Citizens Award - Kayla Li, Phoung Ly, and Hannah Seamans

Tubulins In C. Elegans, Daryl D. Hurd

Biology Faculty/Staff Publications

The C. elegans tubulin family is composed of nine α-, six β-, and one γ-tubulin. Tubulins are highly conserved, functioning as α-β heterodimers that assemble into microtubules. These cylindrical and ubiquitous components of the cytoskeleton are critical for nearly all cellular and developmental processes. C. elegans has provided a model for the study of microtubules in multiple settings including separation of chromosomes, cellular polarity, and neuronal sensation. Tubulins and microtubules interact with a long list of other cellular proteins that regulate tubulin homeostasis, modify microtubule dynamics, and control incorporation into or disassociation of higher-order cellular structures such as spindles or …