Recursos de colección

OhioLINK DRC (219.754 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.

University of Toledo ETDs

Mostrando recursos 1 - 20 de 251

  1. A study on the use of polarized light in application to noninvasive tissue diagnostics

    Li, Yanfang
    In this dissertation, multiple investigations on the implementation and use of polarized light for noninvasive diagnostics in turbid media are reported on and discussed. The first study focuses on the development and construction of an automated Mueller matrix imaging system. In the first investigation, a method was developed to estimate the scattering coefficient contribution as a function of particle size in complex mixtures of polystyrene spheres. A partial least squares approach is used to accurately predict the individual scattering coefficient contributions in phantoms containing 0.2, 0.5, 1, and 2 µm diameter spheres. It is also shown how scattering type is encoded...

  2. Identification of Factors Affecting Contaminant Levels and Determination of Infiltration of Ambient Contaminants in Public Transport Buses Operating on Biodiesel and ULSD Fuels

    Kadiyala, Akhil
    This experimental project presents a comprehensive study of indoor pollutant behavior in the public transport buses in the city of Toledo running on alternative fuels and an understanding of the contribution of outdoor pollutant concentrations to in-vehicle pollutant levels. The indoor pollutants monitored are particulate matter, carbon dioxide, carbon monoxide, sulphur dioxide, nitric oxide, and nitrogen dioxide. Temperature and relative humidity are also measured inside the vehicle in addition to the in-vehicle pollutants. The various factors affecting indoor air quality are indoor sources of pollutants (people, furniture, etc.), ventilation, outdoor air quality, meteorology, pollutant decay, and vehicular traffic. The diurnal,...

  3. Optimal Call Admission Control Policies in Wireless Cellular Networks Using Semi Markov Decision Proces

    Ni, Wenlong
    This dissertation investigates the optimal call admission control (CAC) policies for Non Priority Scheme (NPS) and Reserved Channel Scheme (RCS) in wireless cellular networks for the following cases: 1. Homogenous traffic in a cell; 2. Multimedia traffic in a cell; 3. Homogenous traffic in a network; 4. Multimedia traffic in a network. Both new call and handoff call arrival processes are assumed to be Poisson processes, and the call holding times are exponentially distributed with different rate for new calls and handoff calls. Admitting each call would bring a reward to the network provider but holding each call in the system...

  4. Effects of Microcrystallinity on Physical Aging and Environmental Stress Cracking of Poly (ethylene terephthalate) (PET)

    Zhou, Hongxia
    The dependence of polymer properties on structure has been of great practical importance. In this study, the microstructures of two types PET copolymer sheets made from different polymerization process and catalyst systems have been characterized in terms of density, crystallinity, modified structural factor, conformational isomer contents, as well as spherulite sizes. The relation of microcrystallinity to physical aging and environmental stress cracking was systematically evaluated. It is found that physical aging occurs in both amorphous and semi-crystalline PET stored above room temperature, but below the glass transition. Some physical property changes resulting from aging were recorded. Results indicate that after aging,...

  5. Thin film CdTe as high energy x-ray detector material for medical applications

    Kang, Jun
    The purpose of this work is to investigate thin film CdTe as a possible large area detector system to be implemented for electronic portal imaging devices (EPID) in radiation therapy application. The material properties, average atomic number of 50, high electron density, remarkable radiation hardness and high band gap, already made them popular as small-area room-temperature crystalline x-ray detectors. The objective of our project is to define the range of the parameters applicable to a thin-film polycrystalline CdTe x-ray detector for mega-voltage energy beam. Due to small thickness of the film, we plan on using photovoltaic CdTe detector in combination...

  6. Cation Influence on Negative Thermal Expansion in the A2M3O12 Family

    Gates, Stacy D.
    Negative thermal expansion (NTE) describes materials that shrink when they are heated. Most materials expand when heated displaying positive thermal expansion coefficient. Several oxide families display negative thermal expansion behavior. Recently, it has been shown that NTE materials can be used to reduce thermal expansion,and to achieve a more desirable expansion coefficient α, when incorporated into composites. In general, thermal expansion varies for every material. Therefore, problems may arise when attempting to bond multiple materials for applications if the thermal expansion coefficients differ significantly. Such a mismatch in thermal expansion may result in stresses, cracks, or separation at the interface. This...

  7. A Phase 2 Task Analysis Study of the Process-Experiential Narrative Trauma Retelling Task in a Clinical Sample

    Breighner, Emily Sara
    The rising popularity of narrative techniques in psychotherapy (Advi & Georgaca, 2007; Foa, Molnar, & Cashman, 1995; Neimeyer, 2006) calls for careful research investigations of the efficacious properties and outcomes of narrative work. Narrative theory suggests that clients benefit from focusing attention on the construction of their life stories, and the sense they create from their life experiences (White & Epston, 1990). Narrative theory has been applied in the treatment of trauma, as it has been found that clients’ explication of trauma narratives can aid in emotional processing of their intense emotional experiences, which can facilitate progress toward a sense...

  8. Systems Process Engineering for Renal Transplants at The University of Toledo Medical Center Utilizing the Six Sigma Approach

    Bedal, Kyle W.
    Six Sigma is a comprehensive and flexible system for achieving, sustaining and maximizing business success. It strives to improve quality, productivity, and bottom line success using statistical tools. Six Sigma’s methodology consists of five phases: Define, Measure, Analyze, Improve, and Control (DMAIC). In manufacturing, Six Sigma has been used extensively with great success. The application of Six Sigma to the healthcare field is in its early stages and, hence, has not been fully explored. This research investigated the use of Six Sigma with the goal of improving the renal implant process and demonstrating the positive impact of Six Sigma on the healthcare industry. The objective of the research...

  9. Balancing the Tripod: Security, Immigration and the Economy In the Post-9/11 United States

    Roy, Nalanda
    This thesis is an exploration of the changing relationship between immigration and security in the post-9/11 United States. When it comes to immigration before 9/11, security was not the overarching concern in the United States. The focus was on economic interest, skilled and unskilled labor, and family reunification. However, immediately after 9/11, security became indisputably prioritized. September 11 changed the way Americans started to look at security. Immigration continues to make significant contributions to the US economy, whether in terms of manual labor from Mexico and Central America or in terms of more skilled labor mainly from Asia. September 11,...

  10. A Socio-Historical Analysis of U.S. State Terrorism from 1948 to 2008

    Malone, Chad Allen
    This thesis is a critical examination of U.S. foreign intervention from 1948 to 2008. Using a comparative/historical analysis of seven cases – -Iran, Guatemala, Indonesia, Chile, Nicaragua, Panama, and Iraq – -this study finds patterns of U.S. state/state-sponsored terror and intervention. Using world-system theory and G. William Domhoff's class-domination theory of power, this study explains how and why the U.S. government, the U.S. military, the CIA, and U.S. corporations participate in economically motivated terrorist acts to support the capitalist mode of production, U.S. investments, and access to markets and natural resources. Finally, this study reveals patterns (in addition to the use of...

  11. Analysis of the Interactions between the 5' to 3' Exonuclease and the Single-Stranded DNA-Binding Protein from Bacteriophage T4 and Related Phages

    Boutemy, Laurence S.
    DNA replication and repair is one of the most important cellular processes, since preserving the integrity of the DNA genome is essential to all forms of life. Many proteins are involved in the DNA replication process, and their interaction ensures that the DNA is duplicated and repaired in a coordinated and efficient manner. Bacteriophage T4 is a very good model to study DNA replication, since it encodes all the proteins required at the replication fork, proteins which have been extensively characterized. However, how these proteins interact and coordinate the replication process is still largely unknown. One of these interactions that...

  12. Stimulus Generalization to Different levels of Illumination in Paramecium caudatum

    Gurney, Rebecca L.
    This study was conducted to determine if paramecia (P. caudatum), unicellular organisms, could exhibit stimulus generalization as do mammals and other multicellular organisms. Paramecia were placed in a trough that was divided into two equal portions, one light and one dark, and were trained on a light-dark discrimination. They were rewarded for remaining in the half of the trough that was connected to the cathode of an electrical stimulator, as such cathode stimulation had been shown to be attractive to paramecia. For half of the paramecia, the cathode was connected to the light half of the trough during training. During...

  13. Instructional Strategies in Early Childhood Teacher Education: A Comparison of Two Approaches

    Allen, Amy E.
    In an effort to identify the impact of teacher education on P-12 classroom practices, and ultimately on P-12 student learning, this study investigates the differences between two instructional environments in an undergraduate early childhood teacher education program. Data in this qualitative study were collected from students in two methods courses. Content for each course was identical. However, one instructor taught in a center-based instructional environment while the other instructor taught in a non center-based instructional environment. The data show that students in the center-based environment perceived more opportunities to develop autonomy and intrinsic motivation compared to students in the non...

  14. Determining the Intracellular Localization and Efficacy of Novel Anticancer Agents in Human Breast Cancer Cell Lines Through the Use of Fluorescent Microscopy

    Koegle, Eric Richard
    Breast cancer is the second most frequently diagnosed cancer and it ranks second among cancer deaths in women. The anthracycline antibiotic doxorubicin, more commonly known as Adriamycin, is a drug widely used in breast cancer chemotherapy. The mechanism of action of this particular drug is still somewhat unclear, although it is thought to interrupt the progression of a known DNA unwinding enzyme, Topoisomerase II. Another drug used in breast cancer is the anthracenedione, Mitoxantrone. This drug is used in the treatment of metastatic breast cancer. Mitoxantrone is also a Topoisomerase II inhibitor. In some cases, patients become resistant to chemotherapies...

  15. Achieving Build-to-order Supply Chain Capability through Practices Driven by Supplier Alignment and Supplier Empowerment

    Liao, Kun
    Build-to-order Supply Chain (BOSC) is viewed by many researchers as an effective way to achieve high customer value because BOSC can fulfill an individual or a group of customers’ orders while maintaining low cost, cutting inventory cost, eliminating waste, and achieving short response time through flexible manufacturing and integrated logistics. BOSC is needed to support mass customization, which is the ability to make high variety and low cost products and deliver them quickly to meet the diverging needs of customers. Mass customization can be achieved by implementing modularity-based manufacturing practices, postponing production steps that determine product features and performances, and...

  16. The influences of power and resources on flexibilities in a supply chain context

    Jin, Yan
    As a firm specializes in its core competence, it depends more on its suppliers to respond to customer requests in an increasingly turbulent environment. Flexibility within the firm and its supply chain is recognized as a strategic choice that enables the firm to sustain competitive advantages and achieve superior performance. Building on the literature related to resource based theory, relational view theory, and power theory, four main factors are identified as important to achieving flexibility across the supply chain: (1) manufacturing firm's resources, (2) suppliers' dedicated resources, (3) suppliers' flexibility, and (4) manufacturing firm's power with respect to suppliers. Although...

  17. Multi-scale Simulations of Thin-Film Metal Epitaxial Growth

    Borovikov, Valery V.
    The main objective of the work presented in this thesis is to contribute to the understanding of how the growth conditions may affect the surface morphology during deposition. In thin film growth physical processes in a very wide range of time and length scales are relevant. A set of quite different methods of modeling is required when aiming at a more or less complete realistic picture of the growth process. Accordingly, both computer simulations/modeling and analytic calculations were employed in our studies of thin film growth. In particular, a hybrid multi-scale model, which combines a kinetic Monte Carlo (KMC) simulation for the thermal surface diffusion with a Molecular Dynamics (MD) simulation...

  18. The Effect of Exercise on Endothelial Function in Postprandial Lipemia

    Thompson, Benjamin Charles
    Physical activity can prevent atherosclerotic progression which is characterized by an impaired flow-mediated dilation (FMD) response. Using the postprandial state as a surrogate, some of the mechanisms associated with endothelial dysfunction and physical activity are becoming better understood. PURPOSE: To determine the endothelium-dependent response (FMD) to a high fat meal (HFM) prior to a bout of moderate exercise and to see if the shear stress stimulus is appropriate for the FMD response. METHODS: 9 healthy men [32±8 yrs, 80.5±21.8 kg, 178.4±9.6 cm, 25.3±4.9 kg•m-2 (means±SD)] completed 4 randomized experimental conditions: 1) Control, 2) Meal only, 3) Exercise only, 4) Meal...

  19. Electrochemical Deposition of Transparent Conducting Oxides for Photovoltaic Applications

    Attygalle, Dinesh
    Textured back reflector (BR) is an essential component used in substrate type solar cells for light trapping, which enhances the long wavelength absorption. Most commonly used BR consists of a reflecting metal layer(s) of Ag and/or Al and a transparent conducting oxide (TCO) layer such as ZnO. This type of BR, if properly textured, can lead to about 20% increase in the short-circuit current and cell efficiency. A widely used technique for producing the BR is sputtering due to its simplicity and easy operation for large area thin film solar cell applications. The TCO layer needs to be thick enough...

  20. "Yoshimoto Taka'aki's Karl Marx: Translation and Commentary"

    Yang, Manuel
    In 1966 the Japanese New Left thinker Yoshimoto Taka'aki published his seminal book on Karl Marx. The originality of this overview of Marx's ideas and life lay in Yoshimoto's stress on the young Marx's theory of alienation as an outgrowth of a unique philosophy of nature, whose roots went back to the latter's doctoral dissertation. It echoed Yoshimoto's own reformulation of "alienation" (and Marx's labor theory of value) as key concept in his theory of literary language (What is Beauty in Language), which he had just completed in 1965, and extended his argument – ongoing from the mid-1950s – with Japanese Marxism...

Aviso de cookies: Usamos cookies propias y de terceros para mejorar nuestros servicios, para análisis estadístico y para mostrarle publicidad. Si continua navegando consideramos que acepta su uso en los términos establecidos en la Política de cookies.