Index Catalog // ScholarsArchive@OSU

"Doing weddings" : couples' gender strategies in wedding preparation

Creator:: Humble, Aine M.
Abstract:: Men today are doing more household labor than in previous generations, but research suggests that gender still strongly influences household labor. A great deal of labor goes into creating family rituals, which may be central carriers for gender construction. Weddings, in particular, are rituals based on a gender dichotomy that...
Resource Type:: Dissertation

1) Improving the Uptake and Retention of Gadolinium in Tumors for Potential Gadolinium-Neutron Capture Therapy. 2) Integration of Gemcitabine or Localized Irradiation into dsRNA Therapy Significantly Enhanced the Resultant Anti-tumor Activity

Creator:: Le, Uyen Minh
Abstract:: Cancer is one of the leading causes of death in the U.S., and new approaches to control cancer are constantly sought. This dissertation is comprised of two parts: (i) improving the uptake and retention of gadolinium in tumors for potential gadoliniumneutron capture therapy (Gd-NCT) and (ii) integration of gemcitabine or...
Resource Type:: Dissertation

1/f noise of GaAs resistors on semi-insulating substrates, and 1/f noise due to temperature fluctuations in heat conduction

Creator:: Choi, Mun-Seork
Abstract:: This research work focuses on the mechanism of 1/f noise in GaAs resistors on semi-insulating substrates and 1/f noise due to temperature fluctuations in heat conduction in resistors, diodes, and bipolar transistors. The goal of this research is to generate accurate models to explain physical origin of 1/f noise in...
Resource Type:: Dissertation

A beta dosimeter and spectrometer utilizing plastic scintillators and a large-area avalanche photodiode

Creator:: Kriss, Aaron A.
Abstract:: The purpose of this research was to develop and test a radiation detector to perform beta dosimetry and spectroscopy. The detector utilizes plastic scintillator volumes to produce scintillation light in proportion to the amount of energy deposited in them, and a large-area avalanche photodiode to convert the light to electrical...
Resource Type:: Dissertation

A biomechanical and physiological comparison of deep-water running styles

Creator:: Killgore, Garry L.
Abstract:: Purpose: The purpose of this investigation was to identify a deep-water running (DWR) style that most closely approximates terrestrial running. Methods: Twenty healthy male and female intercollegiate (NCAA III) distance runners were videotaped from the right sagittal view while running on a treadmill (TR) and in deep water at 55-60%...
Resource Type:: Dissertation

A case study of how upper-division physics students use visualization while solving electrostatics problems

Creator:: Browne, Kerry P.
Abstract:: Presented here is a case study of the problem-solving behaviors of upper-division undergraduate physics majors. This study explores the role of visual representations in students' problem solving and provides a foundation for investigating how students' use of visualization changes in the upper-division physics major. Three independent studies were conducted on...
Resource Type:: Dissertation

A case study of inclusion : its time to get mad

Creator:: O'Dell, Marti
Abstract:: Since the passage of the Education for All Handicapped Children Act in 1975, a number of common problems have emerged. Primarily they involve the difficulties both experienced and created by public schools attempting to fulfill the federal mandate to provide students with disabilities an appropriate public education. The purpose of...
Resource Type:: Dissertation

A cognitive-motivational-relational examination of angry driving : applying Lazarus' model to a public health concern

Creator:: Flint, Matthew O.
Abstract:: Angry driving behaviors that lead to acts of road rage have become a major public health concern. Understanding the differences between people who drive with a high level of anger and those who do not provides insight into possible prevention approaches. This study applied Richard Lazarus' Cognitive-Motivational-Relational (CMR) Model to...
Resource Type:: Dissertation

A comparative analysis of household owned woodlots and fuelwood sufficiency between female and male headed households : a pilot study in rural Malawi, Africa

Creator:: Chikoko, Mercy Gwazeni
Abstract:: Fuelwood is a basic need for rural households in Malawi. However, deforestation has reduced the quantity of forest products such as fuelwood available to households. This has negatively affected rural Malawian quality of life, especially for women who are forced to walk long distances to collect fuelwood, prepare foods with...
Resource Type:: Dissertation

A conditional analysis method applied to globally intermittent turbulence

Creator:: Klipp, Cheryl L.
Abstract:: Globally intermittent turbulence is characterized by sudden switching from significant turbulence to weak turbulence and back on time scales ranging from seconds to tens of minutes as opposed to microscale intermittency, which is due to organization of small scale gradients by individual eddies on scales as small as the Kolmogorov...
Resource Type:: Dissertation

A cross cultural examination of factors influencing exercise during pregnancy

Creator:: Nevarez, Holly Clements
Abstract:: Overweight and obesity are a growing national concern, particularly among women and selected minority populations (Ayala, Elder, Campbell, Slymen, Roy, Engelberg, et al., 2004; NHANES, 2003). Pregnant women bear a disproportionate risk of becoming overweight or obese (Greene, Smickikias-Wright, Scholl, & Karp, 1988; Gunderson et al., 2000; Rossner, 1999). Although...
Resource Type:: Dissertation

A decision framework for the implementation of appropriate logging practices in developing countries : case study -- Ethiopia

Creator:: Spong, Ben
Abstract:: In many areas of the developing world, the continued overexploiting forest resources has the potential to have significant detrimental impacts be placed on sustainable forest management (SFM) can help communities and organizations responsibly manage and utilize the remaining forests over the long term. Ethiopia’s forest lands provide tangible benefits from...
Resource Type:: Dissertation

A descriptive analysis of the tasks and focus of individual supervision in an agency setting

Creator:: Aasheim, Lisa Langfuss
Abstract:: Individual supervision is a widely accepted practice in the counseling profession, yet the tasks and focus of individual supervision in an agency setting remain largely uninvestigated. The tasks and focus areas inherent to agency supervision are especially important to counselors, counselor educators, agency administrators, and licensing boards, all of whom...
Resource Type:: Dissertation

A Diels-Alder approach to biaryl synthesis

Creator:: Ashburn, Bradley O.
Abstract:: An expedient approach to the synthesis of a wide range of highly programmable biaryl templates has been accomplished. Utilizing the Diels-Alder [4+2] cycloaddition, a wide range of tri- and tetra-ortho-substituted biaryls have been synthesized in only three to four steps from commercially available materials. We have successfully synthesized entire classes...
Resource Type:: Dissertation

A direct-drive wave energy converter with contactless force transmission system

Creator:: Agamloh, Emmanuel B.
Abstract:: Commonly proposed ocean wave energy converters (OWEC) use inefficient and maintenance demanding intermediate hydraulic and pneumatic systems. We propose a novel rotary direct-drive OWEC that eliminates these intermediate stages. The new device employs a contactless force transmission system (CFTS) comprising a “piston” and a “cylinder” and a ball screw to...
Resource Type:: Dissertation

A dual-path 2-0 MASH ADC with dual digital error correction

Creator:: Zhang, Zhenyong
Abstract:: This dissertation presents a dual-path 2-0 MASH (Multi-stAge-noise -SHaping) ADC with two verified digital corrections of DAC mismatch error and quantization noise leakage. By using these two techniques, the requirements for the analog circuits are greatly relaxed. The dual-path structure generates two outputs, one only composed of conversion errors, the...
Resource Type:: Dissertation

A fistful of Astragalus : phenotypic and genotypic basis of the most taxon rich species in the North American flora

Creator:: Knaus, Brian J.
Abstract:: The study of the infra-specific ranks (i.e., subspecies and variety) can be considered the study of the process of speciation. Astragalus lentiginosus Douglas ex Hooker (Fabaceae) is the most taxon rich species in the U.S. flora currently including 40 taxonomic varieties. These varieties were described using traditional taxonomic methods primarily...
Resource Type:: Dissertation

A formal model of construction safety and health risk management

Creator:: Hallowell, Matthew R.
Abstract:: Despite recent efforts to improve site safety, construction still accounts for a disproportionate injury and illness rate. According to the 2007 injury and illness data released by the National Safety Council, the construction industry has a fatality and disabling injury rate that is approximately three times higher than the all-industry...
Resource Type:: Dissertation

A formative evaluation of pre-service preparation of substance abuse counseling in CACREP accredited school counseling programs

Creator:: Biles, Kathy E.
Abstract:: Substance abuse is a prevalent occurrence among adolescents. A review of the literature revealed that adolescent substance abuse has a strong connection to their academic performance. School counselors address adolescents' academic and personal/social needs by providing services through prevention education, responsive services, and collaboration with community members. Yet, there is...
Resource Type:: Dissertation

A formative evaluation of pre-service suicide prevention training in CACREP accredited school counseling programs

Creator:: House, Terrie J.
Abstract:: Suicide is currently the third leading cause of death for adolescents ages 15- 24. While much attention has been given to this topic, no research has examined what specific information is being taught to pre-service school counselors. The purpose of this descriptive study was to evaluate the pre-service suicide prevention...
Resource Type:: Dissertation

A fully digital technique for the estimation and correction of the DAC error in multi-bit delta sigma ADCs

Creator:: Wang, Xuesheng
Abstract:: This thesis proposes a novel fully digital technique for the estimation and correction of the DAC error in multi-bit delta sigma ADCs. The structure of the DAC error is indicated through a simple model for unit-element based DACs. The impact of the DAC error on the performance of ADC is...
Resource Type:: Dissertation

A macroscale measurement and modeling approach to improve understanding of the hydrology of steep, forested hillslopes

Creator:: Graham, Christopher Brian
Abstract:: The dominant controls on flow generation in steep, forested hillslopes are poorly understood. This dissertation examined the dominant flow processes operating at the hillslope scale, using a combined macroscale measurement and model development and analysis framework. Irrigation experiments at two steep forested hillslopes were conducted to isolate individual hillslope flow...
Resource Type:: Dissertation

A mathematical modeling framework for scheduling and managing multiple concurrent tasks

Creator:: Shakeri, Shakib
Abstract:: Occurrence of human error in highly complex systems, such as a cockpit, can be disastrous and/or overwhelmingly costly. Mismanagement of multiple concurrent tasks has been observed by researchers to be a type of repetitive human error in previous studies of accidents and incidents. This error may occur in the form...
Resource Type:: Dissertation

A methodology to solve large-scale group fleet replacement problems

Creator:: Somboonwiwat, Tuanjai
Abstract:: This research addresses the large-scale group fleet replacement problem with multiple vehicle types of multiple units, under budget and demand constraints. Past research in group fleet replacement is limited and has focused on one vehicle type, with multiples units and constraints. Many studies in fleet replacement have also dealt with...
Resource Type:: Dissertation

A microscopic and phenological study of pollen development and bloom in selected cultivars of hazelnut (Corylus avellana)

Creator:: Tiyayon, Chantalak
Abstract:: Pollen development is an important process in male flower development, the timing of which may be correlated with time of pollen shed in hazelnut (Corylus avellana L.). Early to very late blooming cultivars were identified and the relationship of microsporogenesis and microgametogenesis, and time of pollen shed were studied in...
Resource Type:: Dissertation

A multi-bit delta sigma audio digital-to-analog converter

Creator:: Wang, Ruopeng
Abstract:: Digital-to-analog converters (DACs) with wide dynamic range and high linearity are required for high-end audio applications. A multi-bit delta sigma audio DAC, using a novel gain-correction technique, is described in this thesis. For widely varying on-chip RC time constant, the DAC gain can be accurately controlled by the correction circuitry....
Resource Type:: Dissertation

A multi-bit hybrid DSM over full-scale range without feedback DEM

Creator:: Kwon, Sunwoo, 1974-
Abstract:: Evolution of the mobile communication standards and proliferation of hand-held devices mandate stringent Analog-to-Digital Converter (ADC) speciﬁcations. Among various ADCs, a ∆Σ ADC is best known as a power-eﬃcient ADC when more than 12b is required. However, a conventional discrete-time (DT) ∆Σ Modulator (∆ΣM) is inadequate for low-power wideband applications...
Resource Type:: Dissertation

A multi-case study of elementary classroom teachers' transitions to reform-based mathematics instruction

Creator:: White, Elizabeth Busch
Abstract:: The National Council of Teachers of Mathematics published their vision of active, problem-centered instruction with a goal of conceptual understanding in 1989. Fifteen years after these reforms were proposed the changes are reflected in school policy and elementary mathematics curriculum, but only limited change has actually occurred in classroom instruction....
Resource Type:: Dissertation

A multi-product, multi-depot periodic distribution problem

Creator:: Parthanadee, Parthana
Abstract:: Physical distribution is one of the key functions in logistics systems, involving the flow of products from manufacturing plants or distribution centers through the network of transportation to consumers. The function is very costly, especially for the distribution industries. During the past decades, the significance of physical distribution has increased...
Resource Type:: Dissertation

A new trigonal huntite material and subgroup relationships between crystallographic space groups

Creator:: Hruschka, Michael Archimedes and Hruschka, Michael A.
Abstract:: The use of an adjacency matrix to determine distant (not maximal or minimal) subgroup and supergroup relationships between crystallographic spacegroup types is described. Full lists of space-group types that are supergroups and subgroups for every space-group type were compiled. A list of the space-group types connected to each space-group type...
Resource Type:: Dissertation

A novel lattice Boltzmann method for treatment of multicomponent convection, diffusion, and reaction phenomena in multiphase systems

Creator:: Parker, James Muirhead
Abstract:: In this work, a multicomponent lattice Boltzmann model is developed for the simulation of multiphase mixing, reactions, and separations processes. This model is unique in that diffusive mass transfer of a component in the model is driven by gradients of chemical potential. This fundamentally correct description of diffusion accurately captures...
Resource Type:: Dissertation

A novel mechanism of chemoprevention by sulforaphane : inhibition of histone deacetylase

Creator:: Myzak, Melinda C.
Abstract:: Targeting the epigenome, including the use of histone deacetylase (HDAC) inhibitors, is a novel strategy for cancer chemoprevention. Sulforaphane (SFN), a compound found at high levels in broccoli and broccoli sprouts, is a potent inducer of Phase 2 detoxification enzymes and inhibits tumorigenesis in animal models. SFN also has a...
Resource Type:: Dissertation

A novel self-sealing chewable sustained release tablet of acetaminophen ; Development and evaluation of novel itraconazole oral formulations ; A novel zero order release matrix tablet

Creator:: Rakkanka, Vipaporn
Abstract:: This thesis describes evaluation of a novel self-sealing chewable sustained release tablet that can maintain controlled release of drug regardless of compaction, crushing, or chewing. The new formulation contains polyethylene oxide which produces a sealant effect for cracks produced in the polymer coating during compaction. Dissolution studies were conducted and...
Resource Type:: Dissertation

A perceived-risk curriculum for at-risk learners

Creator:: Kash, Laurel Renee
Abstract:: Although perceived-risk curriculum, that is, where the learner experiences effects of eustress (positive stress), has been used in Arts or outdoor activities, it has not been used in school classrooms. Milkman’s 1996 studies of after-school Project Self Discovery demonstrated that at-risk students lessened their adverse risky behaviors, such as substance...
Resource Type:: Dissertation

A phenomenological inquiry into the experience of reflection by older adults in adventure-based experiential education

Creator:: Brennan, L. A.
Abstract:: This phenomenological inquiry explored dimensions of reflection for older adults in a developmental oriented adventure education experience. Data were gathered from emergent interviews with four individuals while participating in a multi-day, self-contained experiential education program conducted in a rugged environment, and led by a Navajo leader. Two principle research questions...
Resource Type:: Dissertation

A prospective study of functional performance balance self-efficacy, and bone mineral density in community-dwelling elderly women

Creator:: Gunter, Katherine B.
Abstract:: In the United States, falls are the leading cause of unintentional death with one of every three people 65 years and older falling each year. Falls account for approximately 95% of hip fractures among older adults and falls to the side predominate hip fracture related falls in this population. However,...
Resource Type:: Dissertation

A proteomic approach to 1,2-dichloroethane bioactivation and reaction with redox-active protein disulfide isomerase

Creator:: Kaetzel, Rhonda Sue
Abstract:: Protein disulfide isomerase (PDI), a member of the thioredoxin superfamily, contains two domains with significant sequence homology to the active sites in thioredoxin. PDI facilitates the folding of nascent proteins in the endoplasmic reticulum (ER), binds hormones and Ca²⁺, catalyzes the glutathione dependent reduction of dehydroascorbate, serves as a major...
Resource Type:: Dissertation

A study of adiabatic and diabatic flow boiling in parallel microchannels and fractal-like branching microchannels

Creator:: Daniels, Brian J.
Abstract:: A one-dimensional numerical model has been developed to study diabatic and adiabatic flow boiling in microchannels. This model accounts for developing flow effects and variable property effects. The model uses correlations for void fraction and two-phase multipliers found in the literature. The model has been used to study the performance...
Resource Type:: Dissertation

A study of cavitation instabilities in solids

Creator:: Puttapitukporn, Tumrong
Abstract:: Cavitation instabilities in elastic-plastic solids under spherically-symmetric and axisymmetric loadings were investigated using the finite element method. Both quasi-static and dynamic analyses were used to solve these problems. In the quasi-static analyses, we investigated a cavitation instability in elastic/perfectly-plastic, linear hardening elastic-plastic, power hardening elasticplastic, and constrained silver materials. Here,...
Resource Type:: Dissertation

A summative evaluation of a dolphin assisted therapy program for children with special needs

Creator:: Dilts, Rachel M.
Abstract:: This dissertation reviews the literature on the specialty area of dolphin assisted therapy (DAT), a subfield of animal assisted therapy (AAT). To date the literature on the effectiveness of DAT has been mixed although a majority of it is positive. The study was conducted with 40 parents whose children were...
Resource Type:: Dissertation

A systems thinking approach to education reform : addressing issues surrounding teacher burnout through comprehensive school change

Creator:: Matier, Kimberly E.
Abstract:: There is a wealth of research on issues surrounding teacher burnout and school reform. The literature on burnout, however, does not provide information on system-based burnout prevention models. Comprehensive reform, although intended to improve schools as a whole, does not look at reform models developed as sources of teacher support....
Resource Type:: Dissertation

A technology acquisition tool for key decision makers

Creator:: Self, Stephen
Abstract:: Objectives The purpose of this study was to investigate the need for a technology acquisition tool to be used in the capital purchasing process in health care organizations. Design Multi-method approach consisting of interviews of ten executives of health care organizations. A written survey was then mailed to Chief Executive...
Resource Type:: Dissertation

A theoretical description of anisotropic chemical association and its application to hydrogen-bonded fluids

Creator:: Peery, Travis B.
Abstract:: The thermodynamic and structural effects of highly anisotropic, short-ranged attraction are investigated for single- and four-site interaction models using Wertheim's multi-density graph theory of chemical association. Both models consist of associating hard spheres, where the saturable attraction sites are described by conical wells centered in the hard core and evaluated...
Resource Type:: Dissertation

A unified model of one-dimension two-fluid horizontal flows and its stability analysis

Creator:: Kim, Dong-Wan
Abstract:: An improved version of the one-dimensional horizontal two-fluid flow model has been developed by incorporating physical terms for gravity and local void fraction profiles. Introduction of an interface mixing layer concept allows the one-dimensional two-fluid model to remain hyperbolic. This will overcomes a major obstacle in using the current one-dimensional...
Resource Type:: Dissertation

A wideband low-power continuous-time delta-sigma modulator for next generation wireless applications

Creator:: Chen, Xuefeng
Abstract:: Delta-Sigma (ΔΣ) analog-to-digital converters (ADCs) are widely used in wireless transceivers. Recently, continuous-time (CT) ΔΣ ADCs gain growing interest in wireless applications for their lower power consumption and wider input bandwidth as compared with the discrete-time (DT) counterparts. In this thesis, a wideband low-power CT ΔΣ modulator for next generation...
Resource Type:: Dissertation

Aboveground biomass and ecosystem carbon pools in tropical secondary forests growing in six life zones of Costa Rica

Creator:: Cifuentes Jara, Miguel
Abstract:: Carbon sequestration in tropical secondary forests growing in all climates must be quantified to understand their potential role in adaptation and mitigation strategies of global climate change. Total aboveground biomass (TAGB), soil carbon, and total ecosystem carbon (TEC) were measured in 54 secondary forests growing along a broad bioclimatic gradient...
Resource Type:: Dissertation

Academic achievement : Case studies of a group of Yemeni women

Creator:: Al-Saaidi, Faiza A. H.
Abstract:: This qualitative study explored the life experiences of a small group of Yemeni women who are academically successful and identified factors perceived by this group to have played a major role in their academic success. One of the key objectives was to gain a better understanding of the processes which...
Resource Type:: Dissertation

Academic achievement trajectories of adolescents from Mexican and East Asian immigrant families

Creator:: Jeong, Yu Jin
Abstract:: Academic achievement of adolescent children is directly associated with their success in adulthood. Little is known, however, regarding how adolescents in immigrant families academically grow over time and what factors influence the trajectories. Drawing on the National Educational Longitudinal Survey 1988 (NELS: 88), this study aimed to: 1) identify the...
Resource Type:: Dissertation

Academic libraries at the center of instructional change : Faculty and librarian experience of library leadership in the transformation of teaching and learning

Creator:: Gilchrist, Debra L.
Abstract:: This phenomenological inquiry explored the experiences of library leaders and discipline faculty members engaging in a collaborative instructional change initiative focused on a process-based learning pedagogy and led by an academic library. The investigation’s purpose was providing insight and understanding concerning the: (a) library’s role in instructional leadership; (b) experience...
Resource Type:: Dissertation

Accumulation and effects of 4-nonylphenol in chinook salmon fry and their estuarine amphipod prey

Creator:: Hecht, Scott A.
Abstract:: 4-nonylphenol (NP), a surfactant degradation product, is an unregulated, ubiquitous aquatic contaminant and endocrine disruptor, for which aquatic life criteria are currently under development by U.S. EPA. The effects of NP on estuarine amphipods and chinook salmon fry were investigated, and this dissertation reports research into the impacts of NP...
Resource Type:: Dissertation

Accuracy enhancement techniques in low-voltage high-speed pipelined ADC design

Creator:: Li, Jipeng
Abstract:: Pipelined analog to digital converters (ADCs) are very important building blocks in many electronic systems such as high quality video systems, high performance digital communication systems and high speed data acquisition systems. The rapid development of these applications is driving the design of pipeline ADCs towards higher speed, higher dynamic...
Resource Type:: Dissertation

Accuracy of momentary time sampling : a comparison of varying interval lengths using SOFIT

Creator:: McNamee, Jeff B.
Abstract:: The U.S. Department of Health and Human Services has made the promotion of regular physical activity a national health objective, and experts believe that physical education can play a significant role in the promotion of physical activity. Feasible measurement tools to assess physical activity behavior, by physical educators, are lacking....
Resource Type:: Dissertation

Activity recognition in desktop environments

Creator:: Shen, Jianqiang
Abstract:: Knowledge workers are struggling in the information flood. There is a growing interest in intelligent desktop environments that help knowledge workers organize their daily life. Intelligent desktop environments allow the desktop user to define a set of “activities” that characterize the user’s desktop work. These environments then attempt to identify...
Resource Type:: Dissertation

Activity, composition and structure of soil microbial communities in Savannahshrubs of agroecosystems in semi-arid Senegal

Creator:: Diedhiou, Sire
Abstract:: Piliostigma reticulatum and Guiera senegalensis are two native shrubs that coexist with row crops in parkland systems of the Sahel of Africa. Although permanently green all year around in soil depleted in nutrients and dry for a nine-month period, these shrubs have been largely overlooked. Conventional management of these shrubs...
Resource Type:: Dissertation

Acute and delayed effects of an exhaustive bout of exercise on landing biomechanics in women and men

Creator:: Kipp, Kristof
Abstract:: Although female athletes are at greater risk of non-contact knee injuries than men, the factors that contribute to these injuries are not well understood. One important question is whether intense exercise influences the risk of knee injury, both acutely and over the following days. The purpose of this study was...
Resource Type:: Dissertation

Acute bioactivation and hepatotoxicity of ketoconazole in rat and the determinant presence of flavin-containing monooxygenase (FMO) isoforms in human duodenum, jejunum, ileum, and colon microsomes and Caco-2 cell line

Creator:: Buckholz, Cheryl J.
Abstract:: Two specific goals were addressed for this dissertation. First to investigate and identify the mechanistic profile of ketoconazole (KT)-induced hepatotoxicity by utilizing in vivo and in vitro approaches determining the mechanism of action for the hepatotoxicity incurred. To date, there has not been a mechanistic determination of the hepatotoxicity associated...
Resource Type:: Dissertation

Adaptive diversity and divergence at frog antimicrobial peptide loci

Creator:: Tennessen, Jacob A.
Abstract:: In this dissertation I study evolutionary patterns at genes encoding antimicrobial peptides (AMPs) in frogs. AMPs are short, amphipathic, cationic, secreted proteins that kill bacteria and other pathogens through a non-catalytic mechanism that involves binding to and disrupting the microbial cell membrane. In many animal taxa, positive selection is much...
Resource Type:: Dissertation

Adaptive, wideband analog-to-digital conversion for convergent communication systems

Creator:: Batten, Robert D., 1973-
Abstract:: The exponential rate of advances in modern communication devices in the last several years have brought us higher levels of functionality and performance as well as reductions in physical size and power consumption. To continue this rate of advancement, next generation systems require wider bandwidth and higher resolution ADCs. Additionally,...
Resource Type:: Dissertation

Adult 4-H volunteer empowerment in 4-H youth development settings

Creator:: Olsen, Pamela
Abstract:: The primary purpose of this study was to determine which factors related to adult 4-H volunteer empowerment in 4-H youth development settings. This study examined the relationship of adult 4-H volunteers’ perceived leadership styles of Oregon 4-H Youth Development Educators (YDE) to the adult 4-H volunteer sense of empowerment. In...
Resource Type:: Dissertation

Advanced microarchitecture and circuit design techniques for on-chip memories in CMOS technology

Creator:: Hsu, Steven K.
Abstract:: In modern on-chip memories, an increasing demand for higher performance, lower power, reduced area, and improved robustness creates a rising need for advanced microarchitecture and circuit design techniques. Particularly in large-signal multi-ported register files, these advanced design techniques include: (i) multi-banked arrays, (ii) multi-frequency arrays, (iii) multi-bit width gating, (iv)...
Resource Type:: Dissertation

Advanced separation of concerns and the compatibility of aspect-orientation

Creator:: Dechow, Doug
Abstract:: The appropriate separation of concerns is a fundamental engineering principle. A concern, for software developers, is that which must be represented by code in a program; by extension, separation of concerns is the ability to represent a single concern in a single appropriate programming language construct. Advanced separation of concerns...
Resource Type:: Dissertation

Advanced studies on cyclic amino acids in neurological signaling and peptide antibiotics

Creator:: Blanchard, David, L.
Abstract:: L-pipecolic acid (L-PA) is the higher homolog of proline. It occurs naturally in many organisms, including primates, as an intermediate in lysine degradation. The pathway by which lysine is converted into L-pipecolic acid employs the enzyme Lpipecolate oxidase (L-PO), and appears to be tissue specific to the central nervous system...
Resource Type:: Dissertation

Advances in expression of heterologous protein products by Streptococcus gordonii

Creator:: Warren, Travis Kent
Abstract:: Streptococcus gordonii is a bacterial species that naturally colonizes the oral cavity of most healthy humans. It resides in the mouth as an adherent to dental surfaces and, with few exceptions, does not cause disease in individuals it inhabits. It possesses qualities that encourage its use as a vector to...
Resource Type:: Dissertation

Advances in low-level software protection

Creator:: Van Dyke, Colin William
Abstract:: Preventative methods for software reverse engineering have been given greater attention in recent times due to the increase in computational resources and tools available to the public. The inherent security provided by encoding source into machine code (executable form) can no longer be assumed, given the availability of effective automated...
Resource Type:: Dissertation

Advances in side-channel cryptanalysis : microarchitectural attacks

Creator:: Aciiçmez, Onur
Abstract:: Cryptographic devices leak timing and power consumption information that is easily measurable, radiation of various levels, and more. Such devices also have additional inputs, other than plaintext and keys, like voltage, which can be modified to force the device to produce certain faulty outputs that can be used to reveal...
Resource Type:: Dissertation

Aerobic biotransformation of chlorinated aliphatic hydrocarbons by a benzyl alcohol grown mixed culture : cometabolism, mechanisms, kinetics and modeling

Creator:: Tejasen, Sarun
Abstract:: The aerobic transformation of TCE and cis-DCE by a tetrabutoxysilane-grown microorganism (Vancheeswaran et al., 1999) led to the investigation of novel substrates, including benzyl alcohol, for promoting cometabolism. The culture grew on carboxylic compounds and alcohols, but did not grow on formate, methanol, methane, propane, butane, ethylene, benzene, toluene, or...
Resource Type:: Dissertation

African-American women faculty teaching at institutions of higher-learning in the Pacific Northwest : Challenges, dilemmas, and sustainability

Creator:: Townsend-Johnson, Linda
Abstract:: Title: African-American Women Faculty Teaching at Institutions of Higher Learning in the Pacific Northwest: Challenges, Dilemas, and Sustainability Institutions of higher learning in the Pacific Northwest have successfully recruited African-American faculty, yet these institutions have difficulty retaining African-American faculty for at least five years. African-American women faculty experience problems obtaining...
Resource Type:: Dissertation

Age-related alterations in transcriptional regulation of hepatic glutathione synthesis : remediation by R-alpha-lipoic acid

Creator:: Shenvi, Swapna V.
Abstract:: Glutathione (GSH) is the predominant low molecular weight thiol antioxidant in liver tissue. GSH plays an important role in maintaining the intracellular thiol redox ratio as well as detoxification of electrophiles and xenobiotics. Aging leads to a significant decline (35%; P ≤ 0.05) in hepatocellular GSH levels. Using young (2-4...
Resource Type:: Dissertation

Aging in place : a contemporary social phenomenon

Creator:: Lee, Megan
Abstract:: Most aging individuals prefer to remain in a self-determined home environment, and generally aging adults want to remain in the same home or same community. The benefits of remaining in a self-determined private home environment while aging have been established. Because individuals present a diversity of needs, it takes interdisciplinary...
Resource Type:: Dissertation

ALS-inhibitor resistant downy brome (Bromus tectorum L.) biotypes in Oregon : Mechanism of resistance, fitness, and competition

Creator:: Park, Kee-Woong
Abstract:: Understanding the mechanism of resistance, relative fitness and competitiveness of herbicide resistant biotypes is important to predict population dynamics and to establish resistance management strategies. This study was conducted to determine the level of resistance to acetolactate synthase (ALS) inhibitors and the mechanism of resistance of ALS-inhibitor resistant downy brome...
Resource Type:: Dissertation

Alterations in the permeability of cimetidine by dietary flavonoids using an in vitro transport model, Caco-2 cell

Creator:: Taur, Jan-Shiang
Abstract:: The goal of this dissertation is to investigate the interaction between cimetidine and dietary flavonoids using the Caco-2 cell transport model. It has been shown that flavonoids can change the bioavailability of pharmaceuticals, either by inhibiting metabolizing enzymes or inhibiting the drug efflux transporters. However, the effect of dietary flavonoids...
Resource Type:: Dissertation

Alternative orchard floor management practices, soil quality, nitrogen fertilizeruptake, and apple tree growth and yield

Creator:: McDonald, Sarah Finger
Abstract:: Orchard floor management (OFM) practices can improve soil function and alter the soil biological community. Soil function is dependent on soil forming materials and on management practices but little is known about how OFM affect orchard soil quality, fertilizer N uptake, or tree growth and production. Research plots were located...
Resource Type:: Dissertation

An analysis of consumer response to environmentally certified, ecolabeled forest products

Creator:: Anderson, Roy Carl
Abstract:: Historically, researchers have used surveys, focus groups, and anecdotal evidence to evaluate consumer response to environmentally certified, ecolabeled forest products. These methods generally measure consumer attitudes toward certified forest products. Since the strength of the correlation between attitudes and behavior has long been questioned, consumer response to certified forest products...
Resource Type:: Dissertation

An analysis of Maria Montessori’s theory of normalization in light of emerging research in self-regulation

Creator:: Lloyd, Kathleen M.
Abstract:: The regulation of behavior is a major issue in early childhood development, with important implications for children’s adaptive and maladaptive developmental outcomes. Emerging research suggests that the degree of successful self-regulation depends upon the efficiency of the child’s attentional system and that the ability to focus and sustain attention supports...
Resource Type:: Dissertation

An analysis of technical efficiency and productivity growth in the Pacific Northwest sawmill industry

Creator:: Helvoigt, Ted L.
Abstract:: The objective of this project was to investigate technical efficiency and productivity growth in the Pacific Northwest sawmilling industry over the period 1968-2002. Productivity growth was decomposed into three components: technical change, efficiency change, and scale efficiency change. In addition, using econometric methods, changes in output elasticities and input substitution...
Resource Type:: Dissertation

An assessment of the relationship between culturally specific coping methods and occupational stress for black male counselor educators : Implications for increased diversity in CACREP accredited programs

Creator:: Dempsey, Keith
Abstract:: The absence of Black male counselor educators in CACREP accredited programs is astounding. Out of a pool of 130 CACREP programs, only 31 have at least one Black male full time counselor educator. Although these programs are comprised of approximately 2,000 counselor educators, only 58 of them are Black men....
Resource Type:: Dissertation

An autoethnography of whiteness

Creator:: Burke, Deborah A.
Abstract:: Many White social scientists and educators are unaware of and/or detached from the realities of racism and conduct social research that 1.) perpetuates stereotypes, falsely setting People of Color as inferior and White people as superior and/or 2.) explains the differences of White people and People of Color in terms...
Resource Type:: Dissertation

An ecological analysis of adolescent females' perseptions of sex : implications for onset of sexual intercourse

Creator:: Rink, Elizabeth
Abstract:: This study explores the intrapersonal and interpersonal ecological factors that influence adolescent females' perceptions of sex and the extent to which their perceptions of sex impact onset of sexual intercourse as they mature. Particular attention is given to how depression influences individual, personal and social factors in an adolescent female's...
Resource Type:: Dissertation

An emerging role for the exocyst : plant morphogenesis

Creator:: Cole, Rex A.
Abstract:: Plants develop a vast array of cell shapes and sizes by selectively modifying their surrounding cell walls to expand in some regions and not in others. This process of morphogenesis requires the delivery of secretory vesicles to specific locations at the cell periphery, where exocytosis adds new membrane and proteins...
Resource Type:: Dissertation

An empirical analysis of educator beliefs related to post-industrial labor reforms in the State of Oregon

Creator:: Sampson-Gruener, Gregory Paul
Abstract:: This study examines educator perceptions related to what has been termed New-Union labor reforms. The study provides a review of literature related to teacher Unionization and details a mixed methods analysis of educator beliefs related to three specific labor reforms: (a) alternative salary structures, (b) collaborative, or interest based bargaining...
Resource Type:: Dissertation

An environmental history of Euphoria Ridge, Oregon : a case study for ethnobotany in traditional resource management

Creator:: Fluharty, Suzanne M.
Abstract:: This dissertation looks at one landscape component of the Coquille Indian Tribe's ancestral lands in order to understand the place meaning created and assigned to Euphoria Ridge, Oregon. I focus on three cultural overlays across time that together with the unique biophysical components, generate an importance for the locale to...
Resource Type:: Dissertation

An evaluation into the optimization and application of supercritical fluid extraction and the processing impact on the components in filtrated buttermilk powder

Creator:: Spence, Amy J.
Abstract:: The milk fat globule membrane, a major component in buttermilk, contains many complex lipids known to be involved in a variety of biological processes. Phospholipids, including sphingolipids, exhibit antioxidative, anticarcinogenic, and antiatherogenic properties and have essential roles in numerous cell functions. Filtration coupled with supercritical fluid extraction (SFE) may provide...
Resource Type:: Dissertation

An evaluation of understory vegetation dynamics, ecosystem resilience and state and transition ecological theory in an eastern Oregon ponderosa pine forest

Creator:: Carr, Craig A.
Abstract:: Relatively recent increases in ponderosa pine abundance have effected unprecedented changes to ecosystem structure and function. Efforts to restore ponderosa pine systems are often focused on the manipulation of tree structure and the re-introduction of a more natural fire regime. Successful restoration should also incorporate understory components but information addressing...
Resource Type:: Dissertation

An examination of kin and nonkin foster parents’ experiences

Creator:: De Costa, Jennifer L. (Jennifer Loretta)
Abstract:: The growth of foster care, particularly kin foster care has greatly outpaced our knowledge. The purpose of this exploratory qualitative study was to develop a more informed understanding of foster family functioning from the perspective of foster parents. This study examined the experiences of 9 kin and 12 nonkin foster...
Resource Type:: Dissertation

An experimental study of flow boiling heat transfer enhancement in minichannels with porous mesh heating wall

Creator:: Wang, Hailei
Abstract:: A unique channel surface enhancement technique via diffusion-bonding a layer of conductive fine wire mesh onto the heating wall was developed and used to experimentally study flow boiling enhancement in parallel microchannels. Each channel was 1000 μm wide and 510 μm high. A dielectric working fluid, HFE 7000, was used...
Resource Type:: Dissertation

An exploration of combined distance and direct supervision experiences

Creator:: Clark, Ann T.
Abstract:: The purpose of this study was to discover if a relationship so necessary to effective supervision could be established and maintained over distance. Experiences with a combination of distance and direct supervision in the form of Internet interaction coupled with face-to-face, monthly group supervision were examined. Four participants, all masters-level...
Resource Type:: Dissertation

An exploratory study of an intranet dashboard in a multi-state healthcare system

Creator:: Wolpin, Seth E.
Abstract:: Introduction: Management of complex systems is facilitated through effective information systems that provide real-time data to decision makers. For example, instrument panels in airplanes ensure that pilots have well-designed feedback concerning the status of mission-critical variables. Problem: While pilots have dashboards for feedback and communication, healthcare executives may be unaware...
Resource Type:: Dissertation

An exploratory study of the developmental experience of novice play therapists

Creator:: Aguilera, Mary E.
Abstract:: The purpose of this dissertation was to explore the developmental experience of novice play therapists. A review of the play therapy training literature as well as the counselor development literature suggested that there are characteristics such as patience, flexibility, and a love for children that are needed to work with...
Resource Type:: Dissertation

An integrated study of mechanical forest fuel reduction: quantifying multiple factors at the stand level

Creator:: Bolding, Michael Chad, 1977-
Abstract:: Recent catastrophic wildfires have forced the forest management community to develop new strategies for reducing forest fuels. Tightly spaced understory trees often create a fire ladder allowing surface fires to encroach into the crowns of overstory trees. This situation can lead to intensive, catastrophic, stand-replacement forest fires. Mechanical removal or...
Resource Type:: Dissertation

An intrinsic codimension two cellular decomposition of the Hilbert cube

Creator:: Ghimire, Kailash C.
Abstract:: Cellular sets in the Hilbert cube are the intersection of nested sequences of normal cubes. One way of getting cellular maps on the Hilbert cube is by decomposing the Hilbert cube into cellular sets and using a quotient map. By using a cellular decomposition of the Hilbert cube, an example...
Resource Type:: Dissertation

An investigation into the genetic basis of migration timing in Chinook salmon (Oncorhynchus tshawytscha)

Creator:: O'Malley, Kathleen G.
Abstract:: The genetic basis of adaptation is complex as many fitness-related traits are quantitative and likely influenced by multiple genes with variable effects across different selective environments. One important adaptation for anadromous Chinook salmon (Oncorhynchus tshawytscha) is the time at which individuals return to natal breeding sites within a reproductive season....
Resource Type:: Dissertation

An investigation of carbon and nitrogen metabolism through a genomic analysis of the genus Nitrobacter

Creator:: Starkenburg, Shawn R.
Abstract:: The chemolithoautotrophic nitrite oxidizing bacteria (NOB) participate in the biogeochemical cycling of nitrogen by catalyzing and conserving energy from the oxidation of nitrite (NO₂-) to nitrate (NO₃-) via a nitrite oxidoreductase (NXR). The main objective of this work was to comparatively annotate and analyze the genome sequences of Nitrobacter winogradskyi...
Resource Type:: Dissertation

An investigation of factors affecting the optimal output log distribution from mechanical harvesting and processing systems

Creator:: Marshall, Hamish Douglas
Abstract:: Globally the forest harvesting industry is becoming increasingly mechanized. Driving this trend is the desire to increase productivity and reduce cost, as well as to improve labor-related issues. With mechanization comes an in-forest platform for the introduction of state-of-the-art communication and measurement technologies, and powerful on-board computers. These systems have...
Resource Type:: Dissertation

An investigation of tenth grade students' views of the purpose of geometric proof

Creator:: Gfeller, Mary Katherine
Abstract:: The purpose of this investigation was to describe tenth grade students' views of the purposes of geometric proof within the context of their learning. Classroom observations, the curriculum, assessment tools, journal questions, and a preconceptions questionnaire were used to provide context for the views expressed by students from a single...
Resource Type:: Dissertation

An iterative investigation into the implementation of handheld computers as learning tools in a science museum

Creator:: Phipps, Molly E.
Abstract:: In this study I discuss the state of Free-Choice Learning research, and an investigation into the use of personal ubiquitous technology on visitors' experiences at a science center. The three manuscripts included in this document: 1. Review published research on free-choice learning from 1997-2007 from selected journals 2. Examine visitors'...
Resource Type:: Dissertation

An ontology-based system for representation and diagnosis of electrocardiogram (ECG) data

Creator:: Dendamrongvit, Thidarat
Abstract:: Electrocardiogram (ECG) data are stored and analyzed in different formats, devices, and computer platforms. There is a need to have an independent platform to support ECG processes among different resources for the purposes of improving the quality of health care and proliferating the results from research. Currently, ECG devices are...
Resource Type:: Dissertation

Anaerobic reductive dechlorination of TCE and TCFE in TCE contaminated sediments : enhanced bioremediation and bioaugmentation

Creator:: Lee, Jae-Hyuk
Abstract:: This research focused on the enhanced reductive dechlorination of trichloroethene (TCE) and its surrogate, trichlorofluoroethene (TCFE), using two bioremediation methods in anaerobic conditions. Two anaerobic bioremediation studies were conducted to investigate the effects of microbial communities in the presence of different electron acceptors and donors during anaerobic reductive dechlorination of...
Resource Type:: Dissertation

Analysis of Bayesian anytime inference algorithms

Creator:: Burgess, Scott Alan
Abstract:: This dissertation explores and analyzes the performance of several Bayesian anytime inference algorithms for dynamic influence diagrams. These algorithms are compared on the On-Line Maintenance Agent testbed, a software artifact permitting comparison of dynamic reasoning algorithms used by an agent on a variety of simulated maintenance and monitoring tasks. Analysis...
Resource Type:: Dissertation

Analysis of chlamydial and host proteins associated with infection

Creator:: Chu, Hencelyn
Abstract:: Chlamydiae are obligate intracellular bacteria that infect a variety of eukaryotic hosts and affect normal host processes. Within host cells, their developmental cycle takes place inside non-acidified vacuoles termed inclusions. An inclusion membrane composed primarily of secreted chlamydial synthesized proteins called Incs encloses the inclusion. At this location, Incs have...
Resource Type:: Dissertation

Analysis of high-risk hispanic families in a family support program : characteristics, factors affecting parenting skills over time, and age-paced newsletter efficacy

Creator:: Weatherspoon, Joni
Abstract:: Two studies investigated the characteristics of high-risk Hispanic parents with young children who were enrolled in a primary prevention home visitation program targeting first birth families. In the first study, more and less acculturated high-risk Hispanic families were compared to high-risk non-Hispanic White families on differences in demographic characteristics, risk...
Resource Type:: Dissertation

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