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OhioLINK DRC (218,898 recursos)
Ohio campuses are treasure troves of knowledge, but valuable resources are often hidden. The Ohio Digital Resource Commons (DRC) provides a robust, statewide platform for saving, discovering and sharing—free of charge—the instructional, research, historic and creative materials produced by the University System of Ohio and Ohio's private colleges.

Ohio University ETDs

Mostrando recursos 1 - 20 de 2,604

1. Exploring Algorithms for Branch Decompositions of Planar Graphs - Dinh, Hiep
A branch decomposition is a type of graph decomposition closely related to the widely studied tree decompositions introduced by Robertson and Seymour. Unlike tree decompositions, optimal branch decompositions and the branch-width of planar graphs can be computed in polynomial time. The ability to construct optimal branch decompositions in polynomial time leads to efficient solutions for generally hard problems on instances restricted to planar graphs. This thesis studies efficient algorithms for computing optimal branch decompositions for planar graphs. Our main contribution is an improved software package for graph decompositions with efficient implementations of two additional decomposition classes: carving decompositions and branch decompositions....

2. Pre-service Teachers Attitudes Toward Integration: Does a Student Teacher Placement in an Integrated Classroom Make a Difference? - Theaker, Sherri L.
The primary purpose of this study was to determine whether a student teaching placement in an integrated classroom would promote a positive change in pre-service teachers attitude toward children with disabilities. Sixty-nine senior level pre-service teachers in early childhood education completing preschool student teaching participated in this study. Using a true-experimental design, participants were randomly assigned to two groups using a matched pair technique. The control group was placed into a preschool classroom with no children having disabilities and the experimental group was placed in a classroom with at least one child with and Individualized Education Plan (IEP). Participants completed the...

3. Implementation of a 3D Imaging Sensor Aided Inertial Measurement Unit Navigation System - Venable, Donald T.
This thesis describes an implementation of a 3D imaging sensor aided Inertial Measurement Unit navigation system. The thesis describes previous efforts in the area of alternative navigation, and describes current 3D imaging navigation techniques. The thesis then describes a method of extracting planar surfaces from acquired 3D data. Also described is methodology describing the association of planar surfaces between 3D camera frames. The method of calculating a position solution from extracted and associated planar surfaces is described, along with the implementation of a complimentary Kalman filter to provide a tightly integrated navigation solution between the 3D imaging sensor and the...

4. Presidential Decision-Making During the Vietnam War - Garey, Julie Marie
The relationship between the president and the people is often hard to determine, especially in times of war. Several questions arise when looking at this relationship, including whether or not the president feels that the public is competent enough to formulate opinion and whether the president feels compelled to act as a direct result of incoming opinions from both the public and the media. The following analysis looks at the Vietnam War and the three administrations most closely dealing with the war - the administrations of John F. Kennedy, Lyndon B. Johnson, and Richard M. Nixon - to determine whether...

5. U.S. Elite Newspapers' Pre- and Post-tsunami Coverage, 2003-2006: A Case Study of Sri Lanka - Suryanarayan, Renuka
This study's focus, the tragic December 26, 2004, Indian Ocean tsunami, took more than 31,000 lives in Sri Lanka alone. All 543 stories about the island nation in 3 elite and influential U.S. newspapers, The New York Times, Los Angeles Times, and Christian Science Monitor, were analyzed 18 months before and 18 months after the tsunami (excluding the tsunami itself) by comparing Keesing's Record of World Events (the "menu") to covered events (the "diet"). Results showed that 43% of pre and 76% of post-tsunami Keesing's events were covered. Military/defense was the number 1 topic both pre and post-tsunami. After grouping...

6. The functional roles of the Lateral Pyloric and Ventricular Dilator neurons in the pyloric network of the lobster, Panulirus interruptus - Weaver, Adam L.
Recent work has suggested that particular functions can be ascribed to specific neurons in distributed networks. To investigate this issue, we carried out hyperpolarization “removal” studies of the Lateral Pyloric (LP) and Ventricular Dilator (VD) neurons in the lobster (Panulirus interruptus) pyloric network. We found that these neurons regulate network cycle period; the LP neuron slows the network when present and the VD neuron speeds it. When sufficient current is injected into the pacemaker Anterior Burster (AB) neuron to force the network to cycle outside of its physiological range, the LP neuron disrupts normal patterning when the network is driven...

7. Perceived Spousal Criticism, Self-Efficacy, and Adherence to Diet and Exercise Self-Care Behaviors in Adults with Type 2 Diabetes - Merrill, Jennifer C.
Objective: The primary aim of the current study was to assess the relationships between perceived spousal criticism and dietary and exercise self-care adherence in adults with type 2 diabetes and to determine if self-efficacy mediated this relationship. Research Design and Methods: This study used a cross-sectional survey design. Potential participants were mailed self-report questionnaire packets that included measures of perceived spousal criticism, adherence to diet and exercise, self-efficacy, depressive symptoms and positive and negative affect. Results: The total sample (N=90) was predominantly White (90.0%) and female (53.3%). The mean age was 59.8 years (S.D. 10.6) and 44.4% of participants reported completing a...

8. High-fidelity Distributed Physics for Continuous Interactive Virtual Worlds Using Server Clusters - Nykl, Scott L.
Today's virtual worlds are places of immense interaction and realism that give rise to highly immersive environments. One of the most critical aspects providing this realism is the simulation of motion and the physical interaction between objects, i.e., physics. The physics of a virtual world is governed by mathematical equations that approximate the physical attributes of the real world. As virtual worlds grow larger, the computational complexity grows; thus, the processing time needed to simulate the virtual world grows. Once the processing time required to simulate an amount of time within the virtual world is greater than that same time...

9. Thinking in the Spirit: The Emergence of Latin American Pentecostal Scholars and Their Theology of Social Concern - O’Neil, Sean S.
Latin American Pentecostalism is often characterized as being either socially and politically conservative or apolitical. Nevertheless, Latin American Pentecostal scholars have expressed progressive political and social concerns. In this thesis, I synthesize Latin American progressive Pentecostal theology and explore the prominence given to the Holy Spirit in such doctrine. I also examine the influences of liberation theology on the movement. I argue that the emergence of progressive Latin American Pentecostal scholars has thus far been an ambiguous phenomenon. These scholars have played an important role in bringing Latin American Pentecostals into the ecumenical sphere. Also, their social doctrine seems to...

10. Environmental and Natural Resources Management and Sustainable Rural Development in the Atebubu District, Ghana - Abonkrah, Charles Kwasi
Man’s ability to alter his environment to achieve perceived goals has undoubtedly made an enormous contribution to his economic and social well-being. Unfortunately, this ability to alter the environment often outstrips man’s ingenuity to foresee the negative effects these may bring to present and future generations. This study examined the environmental issues in the Atebubu District in the Brong Ahafo Region in Ghana. It investigated the social distribution of environmental benefits in the district. It further examined the weaknesses and threats to the sound environmental management in the area. In anticipation of the realities that will emerge from the field...

11. A Quadrotor Sensor Platform - Stepaniak, Michael J.
A quadrotor sensor platform capable of lifting a ten pound payload is presented. Platform stabilization is accomplished using classical control methodology and is implemented on a field programmable gate array. The flight control system relies on attitude information derived using a technique that circumvents the electromagnetic susceptibility of the inertial unit while minimizing the propagation of errors. This dissertation develops models for the high-power brushless motors. In particular, the rotational losses as a function of motor speed and the operational characteristics of the electronic speed controller are considered. Furthermore, losses within the batteries are found to dominate the power budget at planned operating...

12. An Assessment of the Impact of the Deregulation of the Electric Power Sector in the U.S. on the Efficiency of Electricity Generation and the Level of Emissions Attributed to Electricity Generation - Sharabaroff, Alexander M.
The present research analyzes the impact of the deregulation of the electric power industry in the United States on the efficiency of electricity generation and the level of emissions attributed to electricity generation. The concepts of econometrics and regression analysis are used as a basis for the empirical analysis. The results of the research suggest that there is a significant and positive relationship between deregulation and the efficiency of electricity generation, i.e. deregulation stimulates the improvement in the efficiency of electricity production. Furthermore, the results indicate that deregulation appears to be significant in reducing the level of sulfur dioxide and...

13. Subjective Reactions to Blood Donation in Donors With and Without Social Support - Hanson, Sarah A.
BACKGROUND: The experience of unpleasant blood donation reactions (e.g., dizziness, nausea, and fainting) has been linked to negative attitudes about donation and consequently decreased likelihood of repeat donation. For that reason, interventions designed to reduce the adverse effects of blood donation are important and likely to increase donor retention. Based on laboratory studies suggesting that social support attenuates both physical and psychological responses to stress, the present study hypothesized that the presence of a supportive person during the donation process may help reduce donors' perceptions of stress and consequent pre-faint reactions. STUDY DESIGN AND METHODS: 31 male and 34 female...

14. Applications of Chemometric Algorithms to Ion Mobility Spectrometry and Matrix Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry - Chen, Ping
Advanced chemometric algorithms have been used for data preprocessing, feature selection, classification, and data compression of ion mobility spectrometry and matrix assisted laser desorption/ionization time-of-flight mass spectrometry data. Ion mobility spectrometry (IMS) furnishes sensitive, portable, robust, and inexpensive sensors that have a variety of potential applications. Matrix assisted laser desorption/ionization mass spectrometry (MALDI-MS) has proved useful for the characterization of bacteria and the detection of biomarkers. A novel method that couples multivariate curve resolution (MCR) and artificial neural networks was first developed to identify toxic industrial chemicals using fused positive and negative ion mobility spectra. This new method enhances the capability...

15. Searle on Intentionality - Allen, Benjamin T.
In 1983 John Searle claimed that perception is intrinsically intentional. If perception is intrinsically intentional then the content of one's subjective experiences cannot be separated from the experiences themselves. It is clear that one can have an experience without attaching a specific meaning to that experience. Therefore Searle's assertion cannot be correct. In this thesis I analyze both Searle's theory of intentionality as it relates to perception and Fred Dretske's criticisms of Searle's theory of intentionality. It is demonstrated that Dretske's initial criticisms fail. The merits of his final criticisms are discussed and used to show that intentionality is not intrinsic...

16. Comparison of Image Generation and Processing Techniques for 3D Reconstruction of the Human Skull - Marinescu, Ruxandra
The purpose of this paper was to compare an unconventional 3D digitizer with an expensive CT-Scan for 3D reconstruction of a human skull. A new method is proposed that will allow the reconstruction of a model from a cloud of points or images and in the same time, will allow the transfer of the reconstructed model in a FEA software. Two models of a human skull were reconstructed, one was reconstructed using a 3D modeling software, 3D Studio Max, from 3D coordinates generated by a 3D digitizer, Microscribe, and another one reconstructed using an image processing software, Surfdriver, from 2...

17. Evaluating Differential Rater Functioning in Performance Ratings: Using a Goal-Based Approach - Tamanini, Kevin B.
Measuring performance in the workplace is an endeavor that has been the central focus of many applied researchers and practitioners. Due to the limited information that objective data provides to decision makers, subjective data are often used to supplement performance ratings. Unfortunately subjective ratings can be biased. Indeed, rating errors frequently bias ratings and have plagued performance evaluations. Much of the performance appraisal (PA) research has focused on ways of eliminating, detecting, or controlling these rater errors. The results from these areas are mixed and insufficient in providing insights and understanding about how to deal with rater errors. This research...

18. Predictors of Academic Success in a Career-Ladder Nursing Program at Hocking College - McKenzie, Beth A. Bancroft
Nursing education programs are faced with the challenge of finding innovative ways to accommodate the growing interest in nursing programs. Educational programs in nursing are lacking the resources to adequately educate the number of students applying for admission. This study seeks to identify predictors of academic success in an LPN program at a two-year public technical college. Logistic regression analysis was used to analyze the research questions for this study. The overall model was 92.7% accurate in predicting academic success in the nursing program. Variables that were significant included math assessment test scores, age, GPA in anatomy and physiology, GPA in...

19. Factors Impacting Student Retention on the Regional Campuses and Centers of Ohio University - Atkinson, Leigh A.
Student retention in higher education is, or at least should be at the center of the radar screen of every college and university. It involves one of the foundations of higher education and the economic health of the institution. The recruitment of new and retention of current students has never been more critical from an economic perspective. This research concentrates on the retention in a different environment, specifically, the regional campuses of Ohio University. This university system incorperates five regional campuses and two centers that have an open-enrollment policy and are non-residential. The campuses offer a variety of associate and...

20. Improvement and Evaluation of Three Cable Haptic Interface - Shank, Jeffrey A.
The Three Cable Haptic Interface (TCHI) prototype built by Williams et. al (2006) is improved by selecting and installing appropriate motors and designing cable reels which together successfully provided the proper amount of force for the intended application. Simulation was performed which showed that the required cable tension force rises almost linearly with frame size, but rises exponentially as the distance from the base plane (Y distance) decreases. Furthermore, it was determined from simulation that the required cable tension can be significantly lessened if the device is configured in such a way as to limited the workspace to approximately 6 cm from...

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