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Higher Education In And For The Workplace: Models And Methods, Ray Coughlan

Theses

This dissertation reports on research and development work, undertaken from 2000 to 2005, to develop and apply innovative models and methods to the establishment of a provision, within higher education in Ireland, tuned to the identified needs of diverse groups of learners in the workplace and in society at large.

Initial research identified, from the workplace perspective, the characteristics required of such provision and the topics it should address. The role of higher education in establishing such provision is reviewed in supporting learner development through the continuum; competence, capability, creativity. Relevant models and methods are identified as existing along a …

Generic And Professional Health Care Beliefs, Expressions And Practices Of Syrian Muslims Living In The Midwestern United States, Hiba Wehbe-Alamah

Electronic Theses and Dissertations

The purpose of this ethnonursing study was to discover the generic and professional health care beliefs, expressions, and practices of Syrian Muslims living in the Midwestern United States and to describe the influence of worldview, cultural context, and social structure, such as technological, religious, political, educational, and economical factors on their folk care beliefs and practices. Leininger's Culture Care Theory was used as an orientational framework for this study. Ten key and twenty general informants participated in this study. Several qualitative enablers were used to assist with the collection and analysis of data. QSR NUD*IST 4, a qualitative research software …

On The Oxidative Degradation And Stabilization Of Future Jet Fuels, Li Gao

Electronic Theses and Dissertations

It is believed that when air saturated jet fuels are subjected to high temperatures, two major fuel decomposition processes occur; thermal oxidation (autoxidation) and pyrolysis. Thermal oxidative degradation occurs when the fuel reacts with the dissolved oxygen present in the fuel and usually starts at temperatures above 120 °C. The deposition process usually occurs from 200-300 °C with deposits stopping after the consumption of the oxygen at about 300 °C. With increasing temperatures (~ 450 °C) the fuel begins to decompose thermally and form pyrolytic deposits.

It is believed that the autoxidation of jet fuel involves a peroxyl radical chain …

Dissipative Lipschitz Dynamics, Vinicio Rafael Rios

LSU Doctoral Dissertations

In this dissertation we study two related important issues in control theory: invariance of dynamical systems and Hamilton-Jacobi theory associated with optimal control theory. Given a control system modelled as a differential inclusion, we provide necessary and sufficient conditions for the strong invariance property of the system when the dynamic satisfies a dissipative Lipschitz condition. We show that when the dynamic is almost upper semicontinuous and satisfies the dissipative Lipschitz property, these conditions can be expressed in terms of approximate Hamilton-Jacobi inequalities, which subsumes the classic infinitesimal characterization of strongly invariant systems given under the Lipschitz assumtion. In the important …

The Stereoselective Synthesis Of The Butyrolactone-Bridged [8-5-5] Tricyclic Ring Systems Of (+/-)-Asteriscanolide Via The Titanium-Mediated Hetero-Pauson-Khand Reaction, Mohamed G. Sherriff

LSU Doctoral Dissertations

The stereoselective construction of the tricyclic ring system of asteriscanolide from cyclooctadiene has been achieved. The synthesis involves two main steps; the synthesis of the aldehyde precursor(5)and the titanium-mediated cabocyclization of 5 to make the three rings of 43 stereoselectively.

Shear Induced Orientation In Polymer-Clay Solutions And Their Influence On The Structure In Multilayered Films, Matthew Michael Malwitz

LSU Doctoral Dissertations

The influence of shear on viscoelastic solutions of poly(ethylene oxide) (PEO) and clay (Cloisite, CNA) was investigated by rheology and small angle neutron scattering (SANS) under shear. These measurements determined the shear-induced orientation of the clay and the polymer as well as their relaxation behavior after cessation of shear. Comparison of PEO-CNA solutions (~100 nm diameter platelets) to previously studied PEO-Laponite gels (~30 nm diameter platelets) found that the orientation of CNA platelets occurs at much lower shear rates. Additionally, the relaxation times were much longer for CNA platelets than for Laponite platelets. From these solutions and gels, multilayered nanocomposite …

Efficient Integral Equation Method For 2.5d Microwave Circuits In Layered Media, Wee-Hua Tang

University of Kentucky Doctoral Dissertations

An efficient integral equation method based on a method of moment (MoM) discretization of the Mixed-Potential Integral Equation (MPIE) for the analysis of 2.5D or 3D planar microwave circuits is presented. The robust Discrete Complex Image Method (DCIM) is employed to approximate the Greens functions in layered media for horizontal and vertical sources of fields, where closed-form formulations of the z-integrations are derived in the spectral domain. Meanwhile, an efficient and accurate numerical integration technique based on the Khayat-Wilton transform is used to integrate functions with 1/R singularities and near singularities. The fast iterative solver - Quadrature Sampled Pre-Corrected Fast …

The Thermal Degradation Of Bisphenol A Polycarbonate In Air, Bok Nam Jang, Charles A. Wilkie

Chemistry Faculty Research and Publications

The thermal degradation of polycarbonate in air was studied as a function of mass loss using TGA/FTIR, GC/MS and LC/MS. In the main degradation region, 480–560 °C, the assigned structures of smaller molecules and linear molecules that evolved in air were very similar to those obtained from the degradation in nitrogen; the degradation of polycarbonate follows chain scission of the isopropylidene linkage, in agreement with the bond dissociation energies, and hydrolysis/alcoholysis of carbonate linkage. Compared to the degradation in nitrogen, some differences were observed primarily in the beginning stage of degradation. Oxygen may facilitate branching as well as radical formation …

Polyethylene And Polypropylene Nanocomposites Based Upon An Oligomerically-Modified Clay, Jinguo Zhang, David D. Jiang, Charles A. Wilkie

Chemistry Faculty Research and Publications

Montmorillonite clay was modified with an oligomeric surfactant, which was then melt blended with polyethylene and polypropylene in a Brabender mixer. The morphology was characterized by X-ray diffraction and transmission electron microscopy, while thermal stability was evaluated from thermogravimetric analysis and the fire properties by cone calorimetry. The nanocomposites are best described as mixed immiscible/intercalated/delaminated systems and the reduction in peak heat release rate is about 40% at 5% inorganic clay loading.

Student Perceptions And Performance In The First Year Of A Mixed Physical Therapy Curriculum, Barbara J. Hoogenboom

Master's Theses and Doctoral Dissertations

Background: Physical Therapy (PT) is a dynamic health profession. There is a compelling need to educate physical therapists to become self-directed, lifelong learners capable of thinking critically. Mixed-design curricula utilize various teaching methods to instruct students in a variety of knowledge areas, psychomotor skills, and cognitive constructs, such as problem-solving, reflection, and critical thinking (CT).

Purpose: To describe outcomes for PT students enrolled in the first year of the mixed design curriculum at Grand Valley State University (GVSU). Outcomes included the development of self-directed learning (SDL) and CT, as well as student-described satisfaction with and perceptions of the first year …

Characterization Of Aged Polymer Modified Asphalt Cements For Recycling Purposes, Codrin Daranga

LSU Doctoral Dissertations

Since polymer modified asphalt cement (PMAC) has been employed for a decade, the lifetime and wear on some of these pavements is reaching a stage where resurfacing is necessary. This research focuses on the characterization of aged polymer modified asphalt cements (PMAC) to evaluate their potential for recycling. A styrene-butadiene-styrene tri-block (SBS) polymer modified asphalt cement was selected and characterized using standard asphalt binder qualification techniques, i.e., the Superpave PG protocol. We developed a procedure to characterize the relative concentration of polymer in asphalt cements by gel permeation chromatography (GPC). Infrared spectrographic, thermogravimetric and rheological techniques were used to identify …

Supercritical Fluid Extraction Of Rice Bran With Adsorption On Rice Hull Ash, Paresh Manilal Patel

LSU Doctoral Dissertations

Rice bran oil was extracted using environmentally-friendly supercritical carbon dioxide at varying conditions. Experimental treatments included pressure (27.6, 41.4 and 55.2 MPa), temperature (40 and 60 oC) and flow rates (25, 45 and 65 g/min) of supercritical carbon dioxide. Extracts collected at different time intervals during 4-hour extraction runs in a 3-L extractor were analyzed for oil yield and antioxidants. Normal-phase HPLC was used for analyzing the extract for important antioxidant compounds of oryzanol, tocopherols, tocotrienols. Silica rich rice hull ash adsorbent was also incorporated in combined extraction-adsorption experiments under similar supercritical fluid conditions. Supercritical extraction yields of rice bran …

On The Stability Of Rotor Bearing Systems Based On Hopf Bifurcation Theory, Jianke Wang

LSU Doctoral Dissertations

This research is aimed to establish instability criteria for a rotor-bearing system which consists of a rotor supported by two fluid-film journal bearings. The static and dynamic characteristics of rotor-bearing systems with consideration of turbulent effects are evaluated by applying the Hopf bifurcation theory (HBT) to the equations of motion. A method is developed for predicting the stability envelope of rotor-bearing systems using HBT. Results are compared with published literature obtained using a trial-and-error method. A method based on HBT is presented for predicting the occurrence of a hysteresis phenomenon, which is observed in experimental results dealing with the instability …

Photocatalysis In A Novel Semiconducting Optical Fiber Monolithic Reactor For Wastewater Treatment, Hongfei Lin

LSU Doctoral Dissertations

The development of photocatalytic reactors is essential for the successful exploitation of heterogeneous photocatalysis on semiconductor particles, which has been shown to be an effective means of removing organic pollutants from wastewater streams. In this dissertation, a novel photocatalytic optical fiber monolith reactor (OFMR), which employed a ceramic multi-channel monolith as a support for TiO2 and quartz fibers inserted inside the monolithic channels as both a light-transmitting conductor and a support for TiO2, was developed for wastewater treatment by investigating the photocatalytic degradation of o-dichlorobenzene (DCB) and phenanthrene (PHE). This configuration provides a high surface area for catalyst coating per …

A Public Relations Case Study On The United States Navy And Marine Corps' Role In Operation Unified Assistance Following The South Asia Tsunami, Hans H. Chun

University of the Pacific Theses and Dissertations

The purpose of this study is to examine from a public relations point-of-view, the public image impact on the United States from the efforts of the U.S. Navy and Marine Corps' response to the tsunami crisis. The thesis analyzes the disaster that affected so many nations, and the humanitarian response of the United States Navy and Marine Corps in Operation Unified Assistance and the role of Navy Public Affairs following the earthquake and tsunami disaster and the importance of visual media.

Blurring The Boundaries Between Immigration And Crime Control After Sept. 11th, Teresa A. Miller

Journal Articles

Although the escalating criminalization of immigration law has been examined at length, the social control dimension of this phenomenon has gone relatively understudied. This Article attempts to remedy this deficiency by tracing the relationship between criminal punishment and immigration law, demonstrating that the War on Terror has further blurred these distinctions and exposing the social control function that pervades immigration law enforcement after September 11th prioritized counterterrorism. In doing so, the author draws upon the work of Daniel Kanstroom, Michael Welch, Jonathan Simon and Malcolm Feeley.

The Ecology Of Breastfeeding, Kim Diana Connolly

Journal Articles

This essay reflects on the ecological advantages of breastfeeding, and argues that that laws promoting and supporting breastfeeding should be included among laws labeled as “environmental.”

Like Crabs In A Barrel: Economy, History And Redevelopment In Buffalo, John Henry Schlegel

Other Scholarship

No abstract provided.

The Pedagogical Significance Of The Bush Stem Cell Policy: A Window Into Bioethical Regulation In The United States (President George W. Bush, Fifth Anniversary Essay Collection), O. Carter Snead

Journal Articles

The enormous significance of the Bush stem cell funding policy has been evident since its inception. The announcement of the policy on August 9, 2001 marked the first time a U.S. president had ever taken up a matter of bioethical import as the sole subject of a major national policy address. Indeed, the August 9th speech was the President's first nationally televised policy address of any kind. Since then, the policy has been a constant focus of attention and discussion by political commentators, the print and broadcast media, advocacy organizations, scientists, elected officials, and candidates for all levels of office …

Some Varieties And Vicissitudes Of Lochnerism, Barry Cushman

Journal Articles

This article is a contribution to the Lochner Centennial Symposium at Boston University School of Law. Until recently, a consensus appeared to be emerging among constitutional historians concerning how best to interpret Lochner-era decisions involving Fifth and Fourteenth Amendment challenges to state and federal economic regulation. After decades during which the Court's jurisprudence had been characterized as the product of a reactionary judiciary's commitments to Social Darwinism and laissez-faire economics, more recent scholars had come to see the Court's police powers decisions as animated by what Professor Howard Gillman has called the principle of neutrality. On this view, the Court's …

Trehalose Loading Through The Mitochondrial Permeability Transition Pore Enhances Desiccation Tolerance In Rat Liver Mitochondria., Xiang-Hong Liu, Alptekin Aksan, Michael Menze, Steven Hand, Mehmet Toner

Faculty and Staff Scholarship

Trehalose has extensively been used to improve the desiccation tolerance of mammalian cells. To test whether trehalose improves desiccation tolerance of mammalian mitochondria, we introduced trehalose into the matrix of isolated rat liver mitochondria by reversibly permeabilizing the inner membrane using the mitochondrial permeability transition pore (MPTP). Measurement of the trehalose concentration inside mitochondria using high perfOrmance liquid chromatography showed that the sugar permeated rapidly into the matrix upon opening the MPTP. The concentration of intra matrix trehalose reached 0.29 mmoVmg protein (-190 mM) in 5 min. Mitochondria, with and without trehalose loaded into the matrix, were desiccated in a …

Cryopreservation Of Human Hematopoietic Stem And Progenitor Cells Loaded With Trehalose : Transient Permeabilization Via The Adenosine Triphosphate-Dependent P2z Receptor Channel., Sandhya S. Buchanan, Michael A. Menze, Steven C. Hand, David W. Pyatt, John F. Carpenter

Faculty and Staff Scholarship

Hematopoietic stem and progenitor cells (HPCs) are a heterogenic population of cells used to treat a number of human diseases. Multilineage differentiation is a required function in successful hematopoietic reconstitution after transplantation of cryopreserved grafts. Conventional use of the cryoprotectant dimethyl sulfoxide (DMSO) has resulted in some reports of infusion related toxicity attributed to DMSO and/or damage to cells during freezethawing procedures. The purpose of this study was to explore the use of trehalose, a nontoxic disaccharide of glucose, as an alternative cryoprotectant. Trehalose was introduced into HPCs using the P2Z receptor, known to form nonselective pores in the presence …

Making A Mark In The Internet Economy: A Trademark Analysis Of Search Engine Advertising, Mark Bartholomew

Journal Articles

No abstract provided.

Aggregate Gradation Optimization -- Literature Search, David Newton Richardson

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

No abstract provided.

Engineered Struvite Precipitation: Impacts Of Component-Ion Molar Ratios And Ph, Jun Wang, Joel Gerard Burken, Xiaoqi Zhang, Rao Y. Surampalli

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Struvite precipitation has the potential for removing and recovering phosphorus from agricultural wastewater streams, such as concentrated animal feeding operations wastewater. However, impacts of anticipated component-ion molar ratios and potentially interfering ions are unknown as are the compounding pH relationship with respect to all potential complexes. This research experimentally investigates and mathematically models these factors. Emphasis is placed upon the composition of formed deposits and model validation with experimental data. Results show that calcium is a major interfering ion affecting the deposit composition, decreasing struvite purity. X-ray diffraction (XRD) and scanning electron microscopy + energy dispersive spectrometry were used to …

Spatial Bioaccumulation Modeling In A Network Of Bayous, Ronaldo Luna, Karen H. Watanabe, Andrew J. Wilding

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

A software system, Spatial Network Bioaccumulation Model (SNBM), was developed to model the bioaccumulation of polycyclic aromatic hydrocarbons (PAHs) in aquatic food webs. The SNBM uses a geographic information system as an engine to: (i) store the spatial representation of input parameters (the data related to the ecosystem), (ii) transfer input and output data to and from the food-web bioaccumulation model, and (iii) display the predicted food-web organism concentrations over a base map of the field site. The bioaccumulation model is a time-dependent, set of first-order ordinary differential equations that are solved numerically. Many sampling locations can be analyzed using …

Condensation On (002) Graphite Of Liquid Bismuth Far Below Its Bulk Melting Point, M. K. Zayed, H. E. Elsayed-Ali

Electrical & Computer Engineering Faculty Publications

Condensation of thermally evaporated Bi on (002) graphite, at temperatures of 300-523K, was studied using in situ reflection high-energy electron diffraction (RHEED) and room temperature ex situ atomic force microscopy (AFM). For deposition at temperatures below 415±5K, transmission RHEED patterns of Bi appeared at an average thickness of ∼0.5 monolayer (ML). AFM images showed that the film consisted of crystallites in the shape of triangular step pyramids with step heights corresponding to single and double Bi layers in the [111] direction. This morphology indicates crystallization from the vapor. For deposition at higher temperatures, diffuse RHEED patterns appeared independent of the …

Suitability Of Pulse Train Control Technique For Bifred Converter, Mehdi Ferdowsi, Ali Emadi, Mark Telefus, Anatoly Shteynberg

Electrical and Computer Engineering Faculty Research & Creative Works

Pulse Train^TM control scheme is presented and applied to a boost integrated flyback rectifier/energy storage dc-dc (BIFRED) converter operating in discontinuous conduction mode (DCM), which avoids the light-load high-voltage stress problem. In contrast to the conventional control techniques, the principal idea of Pulse Train technique is to regulate the output voltage using a series of high and low energy pulses generated by the current of the inductor. The applicability of the proposed technique to both the input and magnetizing inductances of BIFRED converter is investigated. Analysis of BIFRED converter operating in DCM as well as the output voltage ripple …

Automated Control Of Led-Based Illumination Using Image Analysis Metrics, Stephen Mills

Theses

This project discusses a microprocessor controlled illumination system that covers the visible spectrum. It uses multiple discrete wavelength LEDs. Spatial and spectral illumination profiles are achieved by controlling LED currents with an array of voltage controlled current sources. A highly efficient polycarbonate holographic diffuser is used to improve the uniformity of the distribution. System design is underpinned by accurate characterisation and modelling of the LEDs used.

Image analysis techniques are then used to parameterise the recorded scene and to provide a figure of merit for the quality of the illumination. Several functions such as contrast, low/high saturation, average brightness and …

Dredging And Dredge Disposal And Reuse In Ireland, Séamus Sutton

Theses

Dredging involves raising material from a river or estuary bed to the surface and transporting it some distance for disposal or reuse. It may be required to improve navigational access, to allow for port development or for mining aggregates.

This thesis includes a literature review and a detailed study of the dredging industry in Ireland. This study is partly based on a nationwide survey undertaken on dredging and dredge disposal and reuse, the results of which are included in a dredging database created for this project. All the main stakeholders in the industry were invited to complete questionnaire forms for …