Digital Commons Network^™

Bayesian Analysis Of Continuous Curve Functions, Wen Cheng

Theses and Dissertations

We consider Bayesian analysis of continuous curve functions in 1D, 2D and 3D spaces. A fundamental feature of the analysis is that it is invariant under a simultaneous warping/re-parameterization of all target curves, as well as translation, rotation and scale of each individual if necessary. We introduce Bayesian models based on a special curve representation named Square Root Velocity Function (SRVF) introduced by Srivastava et al. (2011, IEEE PAMI). A Gaussian process model for the SRVFs of curves is proposed, and suitable prior models such as the Dirichlet distribution are employed for modeling the warping function as a cumulative distribution …

A Quantitative Analysis Of White-Tailed Deer Harvest Across States And Counties, Rebecca Lynne Cain

Theses and Dissertations

White-tailed deer (Odocoileus virginianus) have gone from locally extirpated to overabundant in many areas in the United States since the early 1900s. Ecosystems with chronically overabundant populations experience many disastrous effects resulting from the selective browsing behavior of deer. White-tailed deer are managed at the state level resulting in different management strategies, harvest data collection, and deer management goals between states. However recreational hunting is the primary tool used by wildlife agencies to control population growth. As such, it is beneficial to understand the influence each regulatory variable has on white-tailed deer harvest.

For this research, I compiled historical harvest …

Inorganic Biodegradable Devices For Temporary Implants, Kassan Unda

Masters Theses

"Implantable electronic devices have great potential to benefit many health care technologies. They comprise of two different categories. The first is permanent prosthetic devices like cardiac pacemakers or nerve stimulants. The other category includes temporary devices for interventional medical monitoring and control scenarios, which lose functionality and become unnecessary after their intended operational lifetime. This can cause serious electromagnetic and biomechanical safety concerns if not removed from the body by an additional surgical operation.

This thesis focuses on exploring the feasibility of implantable inorganic bioresorbable thin film resistive devices utilizing bioactive glass as the core structural material. This device will …

Biomineralization Of Carbonates In Modern Microbial Sediments And Its Implications For Co₂ Sequestration, Varun Gnanaprian Paul

Doctoral Dissertations

"Several bacterial species influence carbonate mineral precipitation by modifying pH, alkalinity, Ca²⁺ activity and by providing nucleation sites for mineralization. Two studies have been undertaken to explore microbial influence in the mineralization of carbonates. In the first study, the ability of sulfate-reducing bacteria (SRB) to induce carbonate mineralization was investigated as a means to enhance mineral sequestration of CO₂. Sulfate-reducing bacteria enriched from hypersaline Storr's Lake, The Bahamas; Lake Estancia, New Mexico; and Great Salt Plains Lake, Oklahoma, were tested in reactors under varying CO₂ concentrations. Carbonate mineral precipitation was achieved only in reactors with Lake Estancia SRB community and …

A Central Support System Can Facilitate Implementation And Sustainability Of A Classroom-Based Undergraduate Research Experience (Cure) In Genomics, Jeremy Buhler, Elaine Mardis, Wilson Leung, Christopher Shaffer, Jennifer Threlfall, Sarah C.R. Elgin, David Lopatto, Charles Hauser, Christopher Jones, Don Paetkau, Vidya Chandrasekaran, David Dunbar, Christy Mackinnon, Joyce Stamm, Consuelo Alvarez, Daron Barnard, James Bedard, April Bednarski, Satish Bhalla, John Braverman, Martin Burg, Hui-Min Chung, Randall Dejong, Justin Diangelo, Chunguang Du, Todd Eckdahl, Julia Emerson, Amy Frary, Donald Frohlich, Anya Goodman, Yuying Gosser, Shubha Govind, Adam Haberman, Amy Hark, Arlene Hoogewerf, Diana Johnson, Lisa Kadlec, Marian Kaehler, Catherine Silver-Key, Nighat Kokan, Olga Kopp, Gary Kuleck, Jane Lopilato, Juan Martinez-Cruzado, Gerard Mcneil, Stephanie Mel, Alexis Nagengast, Paul Overvoorde, Susan Parrish, Mary Preuss, Laura Reed, Gloria Regisford, Dennis Revie, Srebrenka Robic, Jennifer Roecklien-Canfield, Anne Rosenwald, Michael Rubin, Kenneth Saville, Stephanie Schroeder, Karim Sharif, Mary Shaw, Gary Skuse, Christopher Smith, Mary Smith, Sheryl Smith, Eric Spana, Mary Spratt, Aparna Sreenivasan, Jeffrey Thompson, Matthew Wawersik, Michael Wolyniak, James Youngblom, Leming Zhou

Biology Faculty Research

In their 2012 report, the President's Council of Advisors on Science and Technology advocated "replacing standard science laboratory courses with discovery-based research courses"-a challenging proposition that presents practical and pedagogical difficulties. In this paper, we describe our collective experiences working with the Genomics Education Partnership, a nationwide faculty consortium that aims to provide undergraduates with a research experience in genomics through a scheduled course (a classroom-based undergraduate research experience, or CURE). We examine the common barriers encountered in implementing a CURE, program elements of most value to faculty, ways in which a shared core support system can help, and the …

Design Research Using Game Design As An Instructional Strategy, Jason Paul Siko, Michael Barbour

Education Faculty Publications

Game design as an instructional tool can be expensive and time-consuming, as new software requires not only capital outlay but also training for teachers and students. Therefore, researchers have looked at low-tech design platforms to accomplish the same educational goals. One such way is to use Microsoft PowerPoint as a game design tool. In the second iteration of a design study, we have changed the way a homemade PowerPoint game project is implemented in an environmental chemistry classroom by providing more structure and more opportunities for instruction and feedback on the elements of the game design. We compared the performance …

Synthesis Of Radioactive And Nonradioactive Nanostructures Through Radiolytic And Wet Chemistry, Jessika Viviana Rojas Marin

Doctoral Dissertations

"In this work the synthesis of non radioactive and radioactive nanoparticles (NPs) through radiolytic and wet chemistry was studied. Non radioactive NPs of rhenium, iridium, and rhodium were synthesized from aqueous solutions containing the metal salt precursors by gamma irradiation. The solutions were irradiated to generate reducing species that led to the nucleation and growth of the nanoparticles. Amorphous rhenium oxide nanoparticles with average sizes ranging from 10 nm to 55 nm were obtained. Metallic iridium and rhodium nanoparticles were produced in polyvinyl-pyrrolidone (PVP) having narrow particle size distributions and average particle sizes from 2 nm to 6 nm. The …

The Role Of Potential Antioxidant In Medicinal Drug-Induced Oxidative Stress, Weili Fan

Doctoral Dissertations

"Most medicinal drugs have adverse effects. Among the most commonly used of these drugs are several types, known as "oxidative drugs". These are believed to cause adverse effects that induce oxidative stress, an imbalance of generation and detoxification of reactive oxygen species. So it is a reasonable assumption that the antioxidant might alleviate the toxicity induced by these drugs. N-acetylcysteine (NAC), a synthetic thiol, is a free-radical scavenger and a precursor of glutathione (the main endogenous antioxidant). However, the negative charge of NAC at physiological pH limits its bioavailability. N-acetylcysteineamide (NACA) is neutral in charge and is believed to have …

Femtosecond Laser Micro-Machined Optical Fiber Based Embeddable Strain And Temperature Sensors For Structural Monitoring, Armadeep Kaur

Doctoral Dissertations

"Structural monitoring technology is becoming increasingly important for managing all types of structures. Embedding sensors while constructing new structures or repairing the old ones allows for continual monitoring of structural health thus giving an estimate of remaining utility. Along with being embeddable, miniaturized sensors that are easy to handle are highly sought after in the industry where in-situ monitoring is required in a harsh environment (corrosive atmosphere, high temperatures, high pressure etc.).

This dissertation demonstrates the use of femtosecond laser-fabricated Fabry-Perot interferometer (FPI) based optical fiber sensors for embedded applications like structural health monitoring. Two types of Fabry-Perot interferometer sensors, …

Part I: In-Situ Fluorometric Quantification Of Microalgal Neutral Lipids Part Ii: Thermal Degradation Behavior Of Investment Casting Polymer Patterns, Hongfang Zhao

Doctoral Dissertations

"Research described in this dissertation covers two topics. Part-I is focused on in-situ determination of neutral lipid content of microalgae using a lipophilic fluorescent dye. The traditional Nile red stain-based method for detecting microalgal intracellular lipids is limited due to varying composition and thickness of rigid cell walls. In this study, the addition of dilute acid and heating of solution, were found to greatly enhance staining efficiency of Nile red for microalgal species evaluated. Oil-in-water (O/W) microemulsion stabilized by a non-ionic surfactant was employed as a pseudo-standard that mimics lipid-bearing microalgal cells suspended in water. The average neutral lipid contents …

Impact Of Slickwater Fracturing Fluid Compositions On The Petrophysical Properties Of Shale And Tightsand, Yongpeng Sun

Doctoral Dissertations

"A tight reservoir always requires hydraulic fracturing before production to increase production rate. The additives in hydraulic fluids are highly considerable for a successful stimulation. A friction reducer is often used to reduce the flowing friction in the wellbore during hydraulic fracturing. Extensive researches have been conducted to examine the extent it can reduce the fluid friction in tubings; however, no research has been reported on its behavior in a reservoir, which is related to the fracture extension. A breaker is also pumped into the formation to degrade the friction reducer. However, it is not clear that what is the …

Semiconductor Nanocrystals For Novel Optical Applications, Jong-Sik Moon

Doctoral Dissertations

“Inspired by the promise of enhanced spectral response, photorefractive polymeric composites photosensitized with semiconductor nanocrystals have emerged as an important class of materials. Here, we report on the photosensitization of photorefractive polymeric composites at visible wavelengths through the inclusion of narrow band-gap semiconductor nanocrystals composed of PbS. Through this approach, internal diffraction efficiencies in excess of 82%, two-beam-coupling gain coefficients in excess of 211 cm^-1, and response times 34 ms have been observed, representing some of the best figures-of-merit reported on this class of materials. In addition to providing efficient photosensitization, however, extensive studies of these hybrid composites …

Bioactive Glass/Polymer Composites For Bone And Nerve Repair And Regeneration, Ali Mohammadkhah

Doctoral Dissertations

"Bioactive glasses have several attractive properties in hard and soft tissue repair but their brittleness limited their use, as scaffolding materials, for applications in load- bearing hard tissue repair. At the same time, because of their bioactive properties, they are being studied more often for soft tissue repair. In the present work, a new glass/polymer composite scaffold was developed for the repair of load-bearing bones with high flexural strength and without brittle behavior. The new composites have 2.5 times higher flexural strength and ~100 times higher work of fracture (without catastrophic failure) compared to a similar bare glass scaffold.

Also …

The Bombs Bursting In Air: A History Of The Effects Of Atmospheric Nuclear Weapons Testing On Washington County, Utah, 1951-1963, Paul W. Bridges Ii

College of Graduate Studies: Theses & Dissertations

This thesis explores the effects of atmospheric nuclear weapons tests conducted at the Nevada Test Site from 1951-1962 on Washington County, Utah, specifically focusing on the effects of these detonations on the local population, the local flora and fauna, and the ensuing impact of political and economic forces. While some Americans readily concede that these tests were necessary for the survival of the United States in the face of Soviet nuclear aggression, other Americans (notably, those who were most closely affected) do not share such a patriotic view of the government’s conduct in performing such extensive and damaging experiments. Therefore, …

Structure Vs. Properties Using Chemical Graph Theory, Tabitha N. Williford

College of Graduate Studies: Theses & Dissertations

Chemical graph theory began as a way for mathematicians to bring together the areas of the Physical Sciences and Mathematics. Through its use, mathematicians are able to model chemical systems, predict their properties as well as structure-property relationships. In this dissertation, we consider two questions involving chemical graph theory and its applications. We first look at tree-like polyphenyl systems, which form an important family of compounds in Chemistry, particularly in Material Science. The importance can be seen in LEDs, transmitters, and electronics. In recent years, many extremal results regarding such systems under specific constraints have been reported. More specifically are …

Sessile Invertebrate Colonization On Rocky Outcrops At Gray's Reef National Marine Sanctuary, Brittany Poirson

College of Graduate Studies: Theses & Dissertations

Documenting patterns of sessile invertebrate community development is important for predicting recovery patterns after disturbance and designing effective marine reserves. In the South Atlantic Bight, invertebrate assemblages can differ significantly from one rocky outcrop to another, but the factors driving these differences are not well understood. I tracked community development for fourteen months at four rocky outcrops at Gray’s Reef National Marine Sanctuary (GRNMS) to address the predictions that (i) developing sessile invertebrate communities in this system do not exhibit a predictable pattern of succession and (ii) recolonization patterns for small patches of open space that become available are influenced …

Stimulus Modality And The Rotational Error: An Examination Of The Various Reorientation Accounts In Humans Using A 3d Virtual Environment, Samuel P. Police

College of Graduate Studies: Theses & Dissertations

Reorientation occurs when an organism enters a novel environment and utilizes cues within said environment to get its bearings. Though reorientation occurs, little is known about which cues are utilized to reorient and the mechanism underlying this reorientation process. Three competing accounts of how the reorientation process occurs were presented and discussed in terms of which cues are predicted to be utilized in reorientation: the geometric module, the associative strength model, and the adaptive-combination view. In the present experiment, human participants were trained in an immersive, 3D virtual environment trapezoid to local a goal location in the presence of either …

The Prevalence And Effect Of Wolbachia Infection On The Brown Widow Spider (Latrodectus Geometricus), Brittany Dane' Arrington

College of Graduate Studies: Theses & Dissertations

Wolbachia was recently identified in the Brown Widow Spider (Latrodectus geometricus). This symbiont has not previously been found in this genus, therefore the consequences on the host’s population dynamics are unknown. The frequency of endosymbiont infection can provide insight into the population dynamics of the host as this bacteria is known to alter host life history. In my 1^st chapter I determine the prevalence of Wolbachia pipentis infection in in the Brown Widow Spider (Latrodectus geometricus) from five locations in the Southeastern United States. Infection frequency differed significantly among sampling locations, ranging from 20% to …

Temporal Patterns Of Aquatic Macroinvertebrate Communities And Organic Matter Standing Stock Availability In A Coastal Floodplain (Altamaha River, Georgia), Erica L. Johnson

College of Graduate Studies: Theses & Dissertations

River floodplain habitats of the Southeastern United States are sites of high biological productivity that rely on a predictable flooding event as a keystone process. This study took place in a river-floodplain area of the Altamaha River, an unimpounded large-order river in the Coastal Plains region of the US. This study aims to investigate how aquatic macroinvertebrate communities changed over the course of the annual flood pulse. I predicted that the communities would be different and that the differences would be driven by hydrology at the main stem and organic matter standing stock availability. I took quantitative samples of benthic …

Classworks As A Means To Gaining Equity In The General Education Math Classroom: Perceptions Of Students Receiving Special Education Services, Diane Marshall

College of Graduate Studies: Theses & Dissertations

With the importance of math steadily increasing, researchers in the field of special education have made efforts to increase the performance of students with disabilities (Fuchs et al., 2008; Gersten, Jordan, & Flojo, 2005). Despite the deficits these students face, the trend has been for many years that most students with disabilities in math receive their instruction in the general education classroom. The purpose of this study was to examine the perceptions that students receiving special education services have regarding the effectiveness of Classworks, a computer-assisted instructional program, in helping them gain equity in the general education math classroom. Critical …

The Caring Beliefs And Practices Of Effective Teachers, Barbara D. Mccollum

College of Graduate Studies: Theses & Dissertations

Current educational reform tends to emphasize an impersonal test-driven approach to teaching while the present research maintains this reform is inequitable because it neglects the personal component of teacher caring, which is necessary to reach all students, especially disaffected underachievers. The purpose of the present multi-case study was to determine the caring beliefs and practices of six effective teachers in two Title I Elementary schools in a central Georgia school system, how these beliefs and practices manifested in the classroom, and in what ways the teachers’ beliefs and practices may have been influenced by their own cultural and socioeconomic backgrounds …

The Effects Of Herbicide On The Endangered Herb Baptisia Arachnifera And Preliminary Nutrient Survey Of Leaf Tissue And Soil, Ruth Ann C. Steinbrecher

College of Graduate Studies: Theses & Dissertations

Baptisia arachnifera (Hairy Rattleweed) is an endangered herbaceous legume that only occurs in Wayne and Brantley Counties of Georgia, United States. Many of the remaining populations exist in areas now managed for timber. This study investigated the effects of Imazapyr, an herbicide commonly used in timber management, on health and vitality of B. arachnifera under both field and greenhouse conditions. This study also analyzed leaf and soil samples from six populations of B. arachnifera to determine the nutrient content of the leaves. A recensus of a B. arachnifera population was also conducted in a site without commercial timber management. In …

Social Experience During Adolescence Influences How Male Zebra Finches (Taeniopygia Guttata) Group With Conspecifics, Tim Ruploh, Hans Joachim Bischof, N Von Engelhardt

School of Biological and Marine Sciences

No abstract provided.

Occupational Exposure To Anti-Cancer Drugs: A Review Of Effects Of New Technology., Nitin Vyas, Dennis Yiannakis, Andrew Turner, Graham J. Sewell

School of Geography, Earth and Environmental Sciences

Because anti-cancer drugs are non-selective, they affect both cancerous and non-cancerous cells. Being carcinogenic and mutagenic, many anticancer drugs therefore present a major health risk to healthcare staff working with them. This paper reviews the means by which exposure to anti-cancer drugs in the workplace may be monitored, assessed and reduced. Both biological monitoring, using non-selective methods or compound-selective methods, and environmental monitoring have provided information on the nature and degree of exposure in the workplace. Pharmaceutical isolators, used for the compounding of cytotoxic IV infusions and the preparation of injectable drugs, provide a physical barrier between pharmacists and cytotoxic …

The Personality Behind Cheating: Behavioural Types And The Feeding Ecology Of Cleaner Fish, Alexander D.M. Wilson, Jens Krause, Je Herbert‐Read, Ashley J.W. Ward

School of Biological and Marine Sciences

AbstractThe complex mutualistic relationship between the cleaner fish (Labroides dimidiatus) and their ‘clients’ in many reef systems throughout the world has been the subject of debate and research interest for decades. Game‐theory models have long struggled with explaining how the mixed strategies of cheating and honesty might have evolved in such a system and while significant efforts have been made theoretically, demonstrating the nature of this relationship empirically remains an important research challenge. Using the experimental framework of behavioural syndromes, we sought to quantitatively assess the relationship between personality and the feeding ecology of cleaner fish to provide novel insights …

Clinical And Biochemical Characteristics Of Children With Juvenile Idiopathic Arthritis, Shakeel Ahmed, Syed Rehan Ali, Sidra Ishaque, Nabil Sami

Department of Paediatrics and Child Health

Objective: To determine the clinical and biochemical characteristics of children with Juvenile Idiopathic Arthritis (JIA) at a tertiary care centre in Karachi, Pakistan.

Study Design: A descriptive study.

Place and Duration of Study: Paediatric Rheumatology Clinic of The Aga Khan University Hospital (AKUH), Karachi, from January 2008 to December 2011.

Methodology: Clinical and laboratory profile and outcome of children less than 15 years of age attending the Paediatric Rheumatology Clinic of the Aga Khan University, Karachi with the diagnosis of Juvenile Idiopathic Arthritis according to International League against Rheumatism were studied. These children were classified into different types of JIA; …

Immune Responses To Vi Capsular Polysaccharide Typhoid Vaccine In Children 2 To 16 Years Old In Karachi, Pakistan, And Kolkata, India, R. Leon Ochiai, M. Imran Khan, Sajid B. Soofi, Dipika Sur, Suman Kanungo, Young Ae You, Atif Habib, Shah Muhammad Sahito, Byomkesh Manna, Camilo J. Acosta, Mohammad Ali, Sujit K. Bhattacharya, Zulfiqar A. Bhutta, John D. Clemens

Department of Paediatrics and Child Health

The geometric mean concentration (GMC) and the proportion maintaining a protective level (150 enzyme-linked immunosorbent assay (ELISA) units [ELU]/ml) 2 years following a single dose of 25 μg of injectable Vi capsular polysaccharide typhoid vaccine was measured against that of the control hepatitis A vaccine in children 2 to 16 years old in cluster randomized trials in Karachi and Kolkata. The GMC for the Vi group (1,428 ELU/ml) was statistically significantly different from the GMC of the control hepatitis A vaccine group (86 ELU/ml) after 6 weeks. A total of 117 children (95.1%) in the Vi group and 9 (7.5%) …

Motivations And Learning Strategies Of West Virginia College Students In Four Four-Year Institutions: A Correlation Study Of Academic, Social, And Demographic Variables, Kimberly G. Colebank

Graduate Theses, Dissertations, and Problem Reports (ETD)

Certain assumptions have been made about the relationship between acceptance criteria and student success. However, the assumption that a more successful college student can be determined based on acceptance criteria data was in doubt. The current study administered the Motivated Strategies for Learning Questionnaire (MSLQ) created by Pintrich, Smith, Garcia and McKeachie (1991) to analyze the motivations and learning strategies utilized by West Virginia students in an Introduction to Psychology course at four public, four-year institutions. Learning strategies were correlated to academic, social, and demographic variables.;The purpose of the study was to determine if West Virginia college students preferred specific …

Patch-Based Ensemble Learning Scheme For Heterogeneous Face Recognition, Cunjian Chen

Graduate Theses, Dissertations, and Problem Reports (ETD)

The problem of Heterogeneous Face Recognition (HFR) involves comparing and matching face images that look significantly different primarily due to variations in their photometric composition. Examples include matching face images acquired in different spectral bands (e.g., visible versus thermal spectrum), or before and after the application of makeup. In this dissertation, we develop and evaluate a robust face recognition method to address this challenge.;The first part of the thesis deals with the topic of facial cosmetics. In this regard, we demonstrate the negative impact of facial cosmetics on existing face recognition as well as gender and age estimation systems. Next, …

Evaluation Of Primary Stability In Bovine Ribs Following A Correction In Placement Depth, Matthew Bobbera

Graduate Theses, Dissertations, and Problem Reports (ETD)

For an implant to be successfully loaded at the time of placement it must have a certain degree of initial stability. While many factors have been shown to influence primary stability, this study aims to examine the effect of positional change on implant stability. 18 Straumann dental implants (16 Standard plus SLA active 3.3mm RN implants, 1 Standard plus SLA 3.3 mm RN implant, and 1 SLActive 4.1 mm RC bone level implant) were placed into two bovine ribs. Implants were divided into two groups with nine in each group and were either backed out or advanced. The primary stability …