Digital Commons Network^™

Laboratory Study Of Responses Of Anuran Amphibians To Roundup¨ Exposures: Experimental Design And Role Of Sediment, Latice Fuentes

All Theses

The contribution of incidental exposures of Roundup¨ herbicide to amphibian declines can be evaluated with carefully designed laboratory tests. Sensitive, sentinel species of larval anurans were exposed to two formulations: the original formulation of Roundup¨ and Roundup WeatherMax¨ in 96-hour acute, aqueous and water-sediment tests. An experimental design was developed that considered and held constant relevant laboratory conditions which produced precise, replicable data. Experimental design factors decreased variability and increased precision by considering and incorporating the following: 1) range-finding tests; 2) reference toxicity tests; 3) the relative sensitivity of the species tested; 4) differences in formulation; 5) the number of …

The Courage And Endurance To Remain In His Own Country And Fight The Battle Out: Donald Davidson And The South, 1893-1968, Michael Sisk

All Theses

This thesis examines the life of Donald Grady Davidson (1893-1968) and the forces - external and internal - that drove him to contribute to I'll Take My Stand: The South and the Agrarian Tradition, in 1930 and remain an avid apologist for Southern Agrarianism for the remainder of his life. Davidson, who began his literary career as a devotee of modernism, opposed much of his native culture yet suddenly changed directions around 1925 and embraced the distinctiveness of his Southern heritage. This thesis argues that events surrounding the Scopes Trial in 1925 caused Davidson to reevaluate his position on the …

Application Of Web Services To A Simulation Framework, Matthew Bennink

All Theses

The Joint Semi-Automated Forces (JSAF) simulator is an excellent tool for military training and a great testbed for new SAF behaviors. However, it has the drawback that behaviors must be ported into its own Finite State Machine (FSM) language. Web Services is a growing technology that seamlessly connects service providers to service consumers. This work attempts to merge these two technologies by modeling SAF behaviors as web services. The JSAF simulator is then modeled as a web service consumer.
This approach allows new Semi-Automated Forces (SAF) behaviors to be developed independently of the simulator, which provides the developer with greater …

Solarization Effects On Chemical Properties Of Soils Under Kudu (Pueraria Montana) Invasion, Nicole Gilbert

All Theses

Solarization is an effective method for managing small areas with kudzu (Pueraria montana) invasions that may alter soil chemical properties. Conducted from 2005 to 2007 at the Clemson University Experimental Forest in Clemson, South Carolina on a Cecil clay loam (fine, kaolinitic, thermic Typic Kanhapludult), this study compares soil chemical properties under thermally-treated and non-treated plots at different depths invaded by Kudzu.
The experimental factors of treatment and depth were arranged in a factorial treatment design with 15 treatments arranged in a split plot design. The five thermal treatments were the whole plot factors which were arranged in a randomized …

From The Gilded Ghetto To Hollywood: Bruce Lee, Kung Fu, And The Evolution Of Chinese America, Darcy Coover

All Theses

As has been true for most groups of immigrants arriving in the United States, the Chinese have undergone a wide-ranging, and at times rapid, transformation in the eyes of mainstream America. No other ethnic or racial group in American history has been so singled out for immigration regulation as have the Chinese--the Exclusion Act, passed in 1882, still represents the only time that a particular ethnic group was selected for immigration restriction. While an analysis of the legal history of the era reveals the various restrictions faced by Chinese immigrants in terms of the state, a look at American popular …

Comparison Of Caddisfly Species (Insecta:Trichoptera) In The Northern Saluda Watershed Over A Thirty-Seven Year Period, In Correlation With Land Development And Use., Michael Biondi

All Theses

Land use and development in South Carolina has greatly increased in the last 50 years. This study focused on land cover change in Northern Pickens County and changes in caddisfly populations at three sites in three sub-watersheds in the South Saluda River watershed. I collected caddisflies from March 31 to October 20 in 2005 and 2006 and compared them to collections performed at the same sites in the same manner in 1969 by John C. Morse for his Master's thesis. I used a geographic information system to assess the land cover change over this thirty-seven year period and correlated the …

Radical Politics In Revolutionary Times: The South Carolina Secession Convention And Executive Council Of 1862, Eric Lager

All Theses

This thesis examines the political culture and behavior in South Carolina during the secession crisis and first two years of the Civil War. Historians have analyzed antebellum politics in South Carolina but few recent attempts have been made to trace those issues to the larger narrative of state politics during the Civil War. I argue that serious political divisions existed in the Palmetto State during the sectional crisis over the proper method and procedure of secession. Once secession became a reality South Carolina politicians attempted to bury these differences for the sake of unity, but ultimately the pressures of war …

P-M Characteristics Of Reinforced Concrete Sections, Paul Johnson

All Theses

This manuscript presents two parametric studies which were performed to evaluate a provision which originated in the 1994 Uniform Building Code (UBC). This provision states that if gravity-induced axial loads carried by a reinforced concrete member are greater than 35% of the pure axial load-carrying capacity (Po) of that member, then the member cannot be used as part of the lateral force resisting system (LRFS). Along with the UBC provision, the Structural Engineers Association of California's (SEAOC) Blue Book states that the value of 0.35Po corresponds to the level of axial load representing a balanced state of strain, i.e., the …

Finite Element Analysis Of Carbon Fiber Composite Ripping Using Abaqus, Joy Pederson

All Theses

An energy dissipation system is proposed for use on consumer passenger automotive vehicles and auto racing stock cars. This system will be utilized to protect the occupants from frontal impacts with stationary or near stationary objects. The system will be affixed to the front of the car's primary structure. It is proposed to replace the traditional steel bumper currently in use. This system will not increase the weight of the car, nor will it adversely affect the aerodynamics of the body. The system will improve the crashworthiness of the vehicle. Advanced composites will be the primary sacrificial element in the …

An Integrated Routing And Distributed Scheduling Approach For Hybrid Ieee 802.16e Mesh Networks For Vehicular Broadband Communications, Rahul Amin

All Theses

An integrated routing and distributed scheduling approach for fast deployable IEEE 802.16e networks is presented where distributed base stations with dual radios form a mesh backhaul and subscriber stations communicate through these base stations. The mesh backhaul is formed via an IEEE 802.16e mesh mode radio on each base station, while the subscriber stations communicate with base stations via PMP mode radios. The proposed routing scheme divides the deployed network into several routing zones. Each routing zone contains several base stations that form the mesh backhaul with one base station equipped with either a fiber, satellite or any other point-to-point …

Transmission Error Analysis And Avoidance For Ieee 802.15.4 Wireless Sensors On Rotating Structures, Jobin Jacob

All Theses

Wireless sensors are increasingly adopted in manufacturing and vehicular systems for monitoring critical components under continuous operation. Many such components move rapidly and frequently in metallic containments with challenging radio propagation characteristics.
For wireless sensors mounted on rotating structures, previous studies identified an eminent increase in packet transmission errors at higher rotation speeds. Such errors were found to occur at specific locations around the rotating spindle's periphery and such locations depended sensitively on sensor location and surrounding geometry. This thesis presents a systematic study of the expected packet error rates due to such errors, and analytically derives the first transmission …

Sex Trafficking: Explanations And Suggested Solutions, Tylee Potter

All Theses

This thesis employs framing theory (Goffman 1974) to analyze interviews with sex workers and three groups of service providers experienced with sex trafficking: (1) law enforcement officials, (2) social service agents, and (3) health care providers. The data set, 'International and Domestic Trends in Sex Trafficking of Women in the United States, 1999-2000,' was collected in 2000 by Dr. Donna Hughes and Dr. Janice Raymond and entails verbatim interviews on various topics regarding sex trafficking including explanations for occurrence and solutions for combating sex trafficking in the United States. Framing theory was used to analyze the diagnostic and prognostic frames …

Development Of A Quadrotor Testbed For Control And Sensor Development, Abhishek Bhargava

All Theses

A quadrotor is an under actuated unmanned aerial vehicle (UAV) which uses thrust from four rotors to provide six degrees of freedom. This thesis outlines the development of a general purpose test bed that can be used for sensor and control algorithm development. The system includes the means to simulate a proposed controller and then a hardware in the loop implementation using the same software. The test bed was assembled and verified with a linear controller for both attitude and position control using feedback from an IMU (Inertial measurement Unit) and a Global Position System (GPS) sensor.
The linear controller …

Synchrophasor's Application In State Estimation, Linwood Ross

All Theses

This thesis presents an investigation into the effect of synchrophasor measurements on the accuracy of a state estimator. Two state estimation algorithms have been developed in Matlab and tested on several systems. The first state estimator is the traditional non-linear estimator that is currently being used by most utilities. The second estimator is a hybrid linear state estimator. A bad data detection algorithm has been developed as well to determine the effect of synchrophasor measurements in bad data detection. A total of seven different systems are used for testing the proposed algorithms. Six systems are used in testing the bad …

Analysis Of Speed-Related Crashes Using Event Data Recorder Data, Swathi Korpu

All Theses

Safety in general is defined as 'the absence of unintended harm to living creatures or inanimate objects' (Evans, 2004). Traffic safety is measured in terms of motor vehicle crashes. A crash is an unplanned event which results in either fatality, or injury or property damage. Of all the factors that contribute to a crash, speed is a major issue, as more than 31 percent of all fatal crashes involve speeding (NHTSA, 2007). The speed-safety relationship can be determined by knowing the effect of speed on the frequency and severity of crashes. The relationship between speed and frequency of crashes is …

Examination Of Pre-Diabetes And Diabetes Perceptions And Knowledge Using Focus Groups, Caroline Carter

All Theses

A review of worksite interventions revealed the scarcity of worksite interventions for the prevention of chronic diseases for which research data has been collected. Pre-diabetes is a condition that has been identified as an emerging chronic disease threat which is deserving of immediate attention as it precedes type 2 diabetes and it is becoming more common in the United States. The number of individuals with pre-diabetes has been estimated to be 54 million. As the worksite setting provides easy access to a large adult population it was chosen for this research study. A thorough review of prior worksite interventions was …

First-Generation, Income-Eligible Peer Mentor Study, Charlotte L. Giscombe

Dissertations

This study was designed to determine how mentoring affects the peer mentor. Despite the proliferation of peer mentoring programs, little research has been conducted to consider how mentoring affects the peer mentor's attitudes, leadership ability, and academic accomplishments when engaging in a mentoring relationship.

The focus of this study is on the at-risk peer mentors who are part of the federally funded Student Support Services (SSS) located on a midwestern university campus, and seeks to ascertain whether their grade point average, retention, graduation rates, self-confidence, self-esteem, self-worth, and leadership abilities are changed by serving in a mentoring relationship. Since these …

Contextual Learning For A Global Economy: A Comparative Case Study Of Two Career Technical Centers And Two Machine-Tool Manufacturing Businesses, Jennifer L. Harrison

Dissertations

This qualitative method research dissertation explored the reactions, insights, and current business practices as they pertained to effectively training workers in areas such as problem-solving, higher order thinking and customer service. This body of work examined both changing economic shifts and global paradigms as well as how a systems thinking approach can help educators prepare students for the 21st century and beyond by implementing action research-based methodologies through effective professional learning communities. The problems to which this study addressed were namely (1) to what extent and in what way are there disparities and similarities between career and technical education settings …

Effective Intervention Approaches For Increased Student Achievement With At-Risk Middle School Students: Voices From Parents, Susan J. Peets

Dissertations

Parent involvement is closely linked to student achievement. Research suggests that students, families, and schools benefit from active participation by families in the process of educating children. Many parents provide a broad range of support to their children, although, currently no common agreement on the most effective forms of parent support exists.

This study focused on the gap in the literature as to the needs of middle school at-risk students' parents. Qualitative methods were used to explore how parents of twelve at-risk middle school students (identified by low academic achievement scores of reading at least one year below grade level …

The Impact Of A Community Leadership Academy In A Midwestern County On Graduates' Attitudes And Behavior Toward Community Trusteeship, Robert Harrison

Dissertations

This qualitative case study was designed to investigate how graduates of a community leadership academy changed their attitudes and behaviors toward community trusteeship and changed their level of community involvement. The research was intended to determine whether participation in a community leadership academy builds in graduates an awareness of community issues, develops leadership skills and creates an understanding of the value of community trusteeship resulting in an increase in community involvement.

The findings of the study were based on a sample of graduates who did or did not perceive any change following participation. Data collection techniques included a participant information …

Biology And Ecology Of Palmer Amaranth (Amaranthus Palmeri), Prashant Jha

All Dissertations

Palmer amaranth (Amaranthus palmeri S. Wats.) is a troublesome weed of crops in southeastern United States. This research highlights studies on the biology and ecology of Palmer amaranth. Following dispersal in fall, Palmer amaranth seeds require high mean temperatures of 25 to 40 C for germination, which is not likely to occur in South Carolina until the following spring. With dormancy reduction over winter, seeds can germinate at high temperatures (≥25 C) and thermal amplitudes of 15 C during late spring (May) in the presence of light. A majority (>90%) of the non-dormant population in the soil seedbank emerge …

Dwarfing Mechanisms Of Prunus Species As Interstems And Rootstocks On Peach [Prunus Persica (L.) Batsch] Tree Vegetative Growth And Physiology, Antonio Weibel

All Dissertations

The use of small trees in orchard systems reduces manual labor (pruning, thinning and harvesting), and induces precocity, thus making high-density plantations economically advantageous, which has elicited an interest in size-controlling rootstocks. However, the mechanisms involved in the reduction of scion growth by the rootstock are not well understood. The main objective of this study was to gain a better understanding of the dwarfing mechanism induced by size-controlling peach rootstocks. The relationship among different rootstocks (dwarfing to invigorating range) as to stored carbohydrates, tree water status, and interstem and grafting height was evaluated on young and mature `Redhaven' and `Redtop' …

Development And Characterization Of Moisture- And Heat- Activated Oxygen Scavenging Nanoparticle, Youngjae Byun

All Dissertations

Alpha-tocopherol and a transition metal, iron, mixture was evaluated as a possible oxygen scavenger. The effects of moisture, amount of transition metal, and thermal processing on oxygen scavenging capability were also investigated. Results showed that alpha-tocopherol and transition metal had 6.72 cc oxygen per gram of oxygen scavenging capacity and 0.11 cc oxygen per gram per day of oxygen scavenging rate.
Nanoencapsulation technology was adopted for the possible oxygen scavenging activation system. Alpha-tocopherol-loaded poly caprolactone (PCL) nanoparticles were prepared by oil in water (O/W) emulsion solvent evaporation with ultrasonification. The effects of PCL concentration, solvent in oil phase, and ultrasonification …

Ecm Stabilization Strategies For Bioprosthetic Heart Valves For Improved Durability, Devanathan Raghavan

All Dissertations

Abstract
Approximately 85,000 heart valve replacement surgeries are performed every year in United States and about 300,000 surgeries worldwide. It is estimated that half of them are mechanical valve replacements and the other half bioprosthetic valve replacements. The use of bioprosthetic heart valves is slowly increasing. Bioprosthetic heart valves are made from porcine aortic valves or bovine pericardium. Commercially these bioprostheses are currently crosslinked using glutaraldehyde (GLUT) to prevent tissue degradation and reduce tissue antigenicity. GLUT crosslinks these bioprostheses by stabilizing the collagen present in the tissue via a Schiff base reaction of the aldehyde with the hydroxylysine / lysine …

Novel Lactide Derived Polymers; Synthesis, Properties And Applications, Dahlia Haynes

All Dissertations

This dissertation primarily encompasses the synthesis, characterization, properties and discussion of applications for lactide derived polymers. The methodology focuses on altering polylactide's (PLA's) dynamic and physical properties increasing its broad market utility in both traditional and non-traditional applications. The fundamentals of this work include understanding and enhancing the polymer chemistry and materials related processes through the use of copolymerization, fluorination, composite chemistry and materials science.
The first chapter discusses the important of this research with emphasis on current world issues that focuses on the feasibility of renewable resources and sustainability implementation. Modification of renewable resource materials like lactic acid is …

A Hierarchical Group Model For Programming Sensor Networks, James Horey

Computer Science ETDs

A hierarchical group model that decouples computation from hardware can characterize and aid in the construction of sensor network software with minimal overhead. Future sensor network applications will move beyond static, homogeneous deployments to include dynamic, heterogeneous elements. These sensor networks will also gain new users, including casual users who will expect intuitive interfaces to interact with sensor networks. To address these challenges, a new computational model and a system implementing the model are presented. This model ensures that computations can be readily reassigned as sensor nodes are introduced or removed. The model includes methods for communication to accommodate these …

Enforceability Of Regulatory Decisions And Protection Of Rights Of Telecommunications Undertakings, Sławomir Dudzik

Yearbook of Antitrust and Regulatory Studies

The article discusses problems of enforceability of regulatory decisions issued by the Polish regulatory authority – the President of the Office of Electronic Communications (UKE) in the context of the protection of the rights of electronic undertakings. The author refers to the standards for implementing decisions and provisional protection developed in the law of the Council of Europe and Community legislation, including Framework Directive 2002/21/EC. He also analyses Polish legal regulations which introduce European solutions, including regulations implementing Community framework for electronic communications, into the national legal order. Special attention is devoted to the competence of Polish administrative courts and …

Morphological Features Of The Staped1us Muscle In Man, Thomas Haberkamp, Alaa Abou-Bieh

Mansoura Medical Journal

Objectives : The aim of this study is to review the gross anatomy and variations of the stapedius muscle and its relations to the structures forming the retrotympanic area. In ad­dition, this study will try to present a theory to explain the reason for these variations from a developmental point of view. ....-*.> Subjects and Methods : Thirty-five temporal bones were dissected, and studied utilizing a microscope and otoendoscopes. The muscle gross anatomy and its relations were stud­ied. •..-.••. .",:_ - .". --. .• Results : Marked variations in the origin and size of the muscle, the course of its …

Immunohistochem1cal Study Of Myoid Cells And Sertoli Cells Of Rat Testis During Postnatal Development, Nawal Hasanain

Mansoura Medical Journal

Microfilaments and intermediate filaments (Ifs) represent an important components of the cytoskeleton. In mammals including rats, peritubular myoid cells (PMCs) contain alpha smooth muscle actin (ct-SMA) micro-filaments, while sertoli cells contain intermediate filaments vimentin. Pre­vious studies mentioned some as­pects about the distribution of these filaments in these cells, however little was mentioned about the changes in their distribution during postnatal (p.n) development. In the present study, immunohisto-chemical methods were used to de­tect the changes in distribution of a-SMA in PMCs and vimentin in sertoli cells during postnatal development of rat testis (one day,7 days,14 days,28 days.42 days and 56 days) …

Mitral Valve Surgery In Patients With Degenerative Mitral Regurgitation And Low Left Ventricular Ejection Fraction

Mansoura Medical Journal

Objectives : The objective of this study is to evaluate survival and changes in left ventricular dimensions and function following mitral valve surgery in patients with mitral regurgi-tation due to degenerative disease and low left ventricular ejection frac­tion (EF <40%). Methods : Mitral valve surgery was performed in 51 patients (43 men and 8 women, mean age 59±14 years). All patients had myxomatous mitral valve disease. Patients with CAD were excluded. Thirty-seven pa­tients (72%) had EF between 20-40% and 14 patients (28%) had EF <20%. Most patients (80%) were in NYHA classes III and IV. All patients were on optimal medical therapy. Twenty-nine patients (57%) had mitral valve repair and 22 patients (43%) had mi­tral valve replacement with mainte­nance of the attachments between papillary muscles and mitral annulus. The meantSD duration of follow-up was 5.9±3.9 years and was complete. Results : There was one operative death (1.9%) and 20 (39%) late deaths, 10 (19.5%) were cardiac re­lated. Five-year survival was 82±5%. &95% of survivors were in NYHA classes II and I. Five-year freedom from reoperation was 97±2%. Five-year freedom from valve-related mor­bidity or mortality was 95+3%.