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Articles 2281 - 2310 of 135657
Full-Text Articles in Entire DC Network
Southern Language, Ideology, And Identity In A High School Sorority, Sara Lide
Southern Language, Ideology, And Identity In A High School Sorority, Sara Lide
Theses and Dissertations
This dissertation explores the language practices of high school sorority members in a mid-sized city in the U.S. South. Specifically, it describes how economically privileged, white, female youth in the Young Ladies’ Society of Midway (YLSM) used Southern language to position themselves and others in relation to widely and locally circulating ideologies of language, region, gender, and class. Drawing on sociolinguistic and linguistic anthropological methods, this study addresses the issues of how Southern language practices and language ideologies relate and how indexical meanings and social identities emerge through linguistic interaction. As a study that examines the language of a group …
Pattern Extraction From Spatial Data - Statistical And Modeling Approches, Hu Wang
Pattern Extraction From Spatial Data - Statistical And Modeling Approches, Hu Wang
Theses and Dissertations
Exploratory and statistical spatial data analyses are commonly used in a wide range of research fields, such as epidemiology, disease surveillance and crime analysis. Spatial epidemiology, for example, needs to detect significant spatial clusters of disease incidents to help epidemiologists identify environmental factors and spreading patterns associated with certain diseases. Existing spatial analysis approaches mostly focus on the analysis of spatial lattice data, i.e., observations organized by locations such as county or census tract. With the wide spread of location-aware technologies such as GPS and smart phones, spatial interaction data have become increasingly available, e.g., human daily mobility, traveling and …
Saint Dominguan Refugees In Charleston, South Carolina, 1791-1822: Assimilation And Accommodation In A Slave Society, Margaret Wilson Gillikin
Saint Dominguan Refugees In Charleston, South Carolina, 1791-1822: Assimilation And Accommodation In A Slave Society, Margaret Wilson Gillikin
Theses and Dissertations
During the 1790s and the first decade of the nineteenth century, nearly 20,000 refugees fled the French colony of Saint Domingue for asylum in the United States. They found new homes in such American port cities as New York, Philadelphia, Baltimore, Charleston, and New Orleans. This dissertation explores the experiences of the white planters, gens de couleur, and slaves who sought asylum in Charleston, South Carolina, and the effect their presence had on the city’s long time residents. It might seem from first glance that finding acceptance in Charleston would be easy for them, but this was not the case. …
Behavior Of Piezoelectric Wafer Active Sensor In Various Media, Tuncay Kamas
Behavior Of Piezoelectric Wafer Active Sensor In Various Media, Tuncay Kamas
Theses and Dissertations
The dissertation addresses structural health monitoring (SHM) techniques using ultrasonic waves generated by piezoelectric wafer active sensors (PWAS) with an emphasis on the development of theoretical models of standing harmonic waves and guided waves. The focal objective of the research is to extend the theoretical study of electro-mechanical coupled PWAS as a resonator/transducer that interacts with standing and traveling waves in various media through electro-mechanical impedance spectroscopy (EMIS) method and guided wave propagation. The analytical models are developed and the coupled field finite element analysis (CF-FEA) models are simulated and verified with experiments. The dissertation is divided into two parts …
Surface Functionalization Of Inorganic Substrates With Polymeric Ligands Using Raft Polymerization, Anand Viswanath
Surface Functionalization Of Inorganic Substrates With Polymeric Ligands Using Raft Polymerization, Anand Viswanath
Theses and Dissertations
This work focused on using polymers to modify the surface of various inorganic substrates, ranging from TiO2, ITO, CDSe and CdS nanostructures to micron sized silica particles. The synthesis of the polymers using the RAFT technique and the characterization of the functionalized substrates were analyzed in detail to provide insights into their use for various applications. In the first part of this work, novel phosphate based RAFT agents and phosphate containing polymers, including poly(methyl methacrylate) (PMMA), poly(glycidyl methacrylate) (PGMA) and poly(dimethyl siloxane) (PDMS) were synthesized. Alkyne functionalized PGMA was used to click to ITO surfaces in a grafting-to method, and …
Attention-Deficit/Hyperactivity Disorder And Academic Performance: Student Engagement In The Classroom, Emily B. Mancil
Attention-Deficit/Hyperactivity Disorder And Academic Performance: Student Engagement In The Classroom, Emily B. Mancil
Theses and Dissertations
Youth with Attention/Deficit-Hyperactivity Disorder (ADHD) have many obstacles to positive development (including difficulties in school settings) and are in need of support. However, few studies have focused on the ways in which positive factors, such as student engagement (SE), may be beneficial for this population to identify strategies for supporting their strengths. Although many studies have examined academic and behavioral aspects of SE, few studies have examined the psychological (i.e., teacher-student relationships, peer support for learning, family support for learning) and cognitive (i.e., control and relevance of school work, future aspirations and goals, extrinsic motivation) sub-components of engagement. The current …
Independence At Large: Contemporary China's Alternative Music Scenes And The Cultural Practices Of Post-Socialist Urban Youth, Shan Huang
Theses and Dissertations
Using contemporary Beijing’s alternative music scenes as a focal point, this ethnographic research seeks to enrich the understanding of China’s post-socialist urban youth by examining their cultural practices. First, this thesis offers an analytical account of the popularizing embrace of “independent cultures,” which is defined as a collection of experienceable objects and activities in musical, filmic, theatric, and other cultural forms that are well recognized yet believed by advocates as having aesthetic and participatory features that are different from those produced in the popular culture industry. While the vogue for independent cultures is substantially conditioned by the socioeconomic attributes of …
Context-Sensitive Seismic Strengthening And Repair Of Substandard Confined Masonry, Rahim Ghorbani
Context-Sensitive Seismic Strengthening And Repair Of Substandard Confined Masonry, Rahim Ghorbani
Theses and Dissertations
Confined masonry (CM) is a construction system consisting of load-bearing masonry panels that are confined with cast-in-place reinforced concrete tie columns and beams. Due to satisfactory seismic performance, CM has become the predominant low-rise residential construction system in several areas around the world. However, in developing regions, the use of substandard materials, details and construction practices may result in inadequate performance as highlighted in the 2010 earthquakes in Haiti and Chile. In the aftermath of an earthquake, households are often reluctant to reoccupy their dwellings due to concerns about safety of structures. If feasible, preventive (pre-hazard) strengthening or structural repair …
Who Let The Elephant In The Room? Analyzing Race And Racism Through A Critical Family Literacy Book Club, Lamar L. Johnson
Who Let The Elephant In The Room? Analyzing Race And Racism Through A Critical Family Literacy Book Club, Lamar L. Johnson
Theses and Dissertations
The purpose of this study was to interpret, investigate, and analyze how race, racism, and power are embedded and intertwined not only in society but also in the education system and in homes and communities. Specifically, through parent and student engagement during a series of book club meetings, I investigated how parents’ racial identities impacted how they created critical dialogue pertaining to issues of race, racism, and power with their children. Guided by critical race pedagogy, critical race theory (CRT) and CRT methodology, this study used race as a critical analytic lens to examine the lives and work of people …
Zinc And Copper Isotopic Fractionation During Planetary Differentiation, Heng Chen
Zinc And Copper Isotopic Fractionation During Planetary Differentiation, Heng Chen
Arts & Sciences Graduate Student Theses and Dissertations
Zinc and copper are two important transition metal elements that are widely involved in every stage of planetary formation and differentiation. Their isotopic ratios are robust tracers used to understand the origin of the Solar System, planetary formation and differentiation processes. In this thesis, I focus on their isotopic behaviors during magmatic processes. I report the Zn isotopic compositions of representative igneous rocks to determine potential isotopic fractionations associated with magmatic processes, and to estimate the bulk silicate Earth value. I report isotopic compositions of various groups of iron meteorites (samples of which represent the core of asteroids) and discuss …
Taxonomy, Host-Plant Associations And Phylogeny Of African Crotalaria-Feeding Seed Beetles (Coleoptera, Chrysomelidae, Bruchinae): The Conicobruchus Strangulatus (Fåhraeus) Species Group, Bruno P. Le Ru, Alex Delobel, Zoltán György, Gwenaëlle Genson, Gael J. Kergoat
Taxonomy, Host-Plant Associations And Phylogeny Of African Crotalaria-Feeding Seed Beetles (Coleoptera, Chrysomelidae, Bruchinae): The Conicobruchus Strangulatus (Fåhraeus) Species Group, Bruno P. Le Ru, Alex Delobel, Zoltán György, Gwenaëlle Genson, Gael J. Kergoat
All Peer-Reviewed Publications
A small group of six morphologically related seed beetles (Coleoptera: Chrysomelidae: Bruchinae) belonging to the Conicobruchus genus is reviewed. Species in this group for which host-plants are known feed on various species of Crotalaria (Fabaceae, Crotalarieae). Here we provide diagnoses and a dichotomous key for all six species. The following synonymies are proposed: Conicobruchus cicatricosus (Fåhraeus, 1839) (= Bruchus cicatricosus pallidioripennis Pic, 1941) syn. nov.; Conicobruchus strangulatus (Fåhraeus, 1839) (= Bruchus hargreavesi Pic, 1933) syn. nov. The corresponding Conicobruchus strangulatus species group is hereby designated. New host-plant data are also included, which correspond to the results of recent collections of …
Certified 2014 Population Estimates For Oregon And Counties, Portland State University. Population Research Center
Certified 2014 Population Estimates For Oregon And Counties, Portland State University. Population Research Center
Oregon Population Estimates and Reports
Certified Population Estimates for Oregon and Its Counties. This item also contains estimates for Incorporated Cities/Towns.
Evolution Of Ecological Dominance Of Yeast Species In High-Sugar Environments, Kathryn Marie Williams
Evolution Of Ecological Dominance Of Yeast Species In High-Sugar Environments, Kathryn Marie Williams
Arts & Sciences Graduate Student Theses and Dissertations
Two challenging goals of evolutionary biology are to understand how evolutionary innovations evolve and how they contribute to the success of lineages. Evolutionary innovations may arise following whole genome duplication (WGD) events and they are suspected to contribute to the success of lineages by creating ecological opportunity. However, direct evidence for duplicated genes involved in evolutionary innovations remains rare, and the relationship between evolutionary innovations and the success of lineages may be very complex. In this study, I explore the relationship of evolutionary innovation, WGD, and the ecological dominance of yeast species in high-sugar environments. In budding yeast, a major …
An Essential Role For Self-Pmhc Throughout The Life Of A Cd4 T Cell: Contributions In The Thymus And Periphery, Stephanie Rodriguez
An Essential Role For Self-Pmhc Throughout The Life Of A Cd4 T Cell: Contributions In The Thymus And Periphery, Stephanie Rodriguez
Arts & Sciences Graduate Student Theses and Dissertations
It is well established that self-peptide Major Histocompatibility Complexes (hereafter self-pMHC) are essential for the development of a broad repertoire of mature, self-tolerant CD4 and CD8 T cells. Despite clear knowledge that the pool of self-ligands is critical for positive and negative selection, the exact kinetics and dynamic nature of thymocyte interaction with self-pMHC class II (self-pMHCII) bearing antigen-presenting cells (APCs) during development is still largely a mystery. The enigmatic nature of selecting self-pMHC is not unique to the thymic environment; increasingly evident is the dependence of peripheral T cells on extra-thymic self-pMHC expression, specifically selecting self-pMHC, for their homeostatic …
Modulation Of Nmda Receptor Activity During Physiological And Pathophysiological Events, Christine Marie Emnett
Modulation Of Nmda Receptor Activity During Physiological And Pathophysiological Events, Christine Marie Emnett
Arts & Sciences Graduate Student Theses and Dissertations
N-methyl-D-aspartate receptors (NMDARs) are ionotropic glutamate receptors that serve crucial signaling and neurotrophic functions throughout the central nervous system. Both hyperfunction and hypofunction of NMDARs are associated with neurological and neuropsychiatric conditions. Thus, both positive and negative pharmacological NMDAR modulators are of clinical interest as treatments. Understanding drug mechanisms could lead to more rational drug design. Memantine and ketamine are NMDAR open channel blockers that exhibit similar pharmacodynamics at NMDARs but have different clinical uses. Memantine improves cognitive decline during Alzheimer's disease. Ketamine is an anesthetic and analgesic with psychotomimetic effects, but it is also a rapid acting and long-lived …
Isotope Harvesting At Heavy-Ion Fragmentation Facilities, Tara Elise Mastren
Isotope Harvesting At Heavy-Ion Fragmentation Facilities, Tara Elise Mastren
Arts & Sciences Graduate Student Theses and Dissertations
Isotope harvesting from heavy-ion fragmentation facilities is a potential source of isotopes of interest for applications research. With the upgrade of the National Superconducting Cyclotron Laboratory (NSCL) to the Facility for Rare Isotope Beams (FRIB) usable quantities of many isotopes of interest will be produced and available for harvest from an aqueous beam dump. If available, these isotopes would be of interest to a broad range of applications such as medicine, geology, and stockpile stewardship. Preliminary experiments were performed at the NSCL in order to determine the feasibility of isotope harvesting at (FRIB).A water target station that consisted of a …
Study Of Ii-Vi Colloidal Semiconductor Magic-Size Nanoclusters And Crystalline Quantum Platelets, Yuanyuan Wang
Study Of Ii-Vi Colloidal Semiconductor Magic-Size Nanoclusters And Crystalline Quantum Platelets, Yuanyuan Wang
Arts & Sciences Graduate Student Theses and Dissertations
The main objective of this project is to prepare and isolate the smallest, discrete, magic-size nanoclusters of cadmium selenide (CdSe) and to grow crystalline, wurtzite CdSe quantum platelets (QPs) at room temperature. The achievement of these goals enables us to provide a general synthesis of II-VI semiconductor magic-size nanoclusters and low-temperature routes to well-passivated nanocrystals having a range of compositions and morphologies.The magic-size nanocluster (CdSe)13 is grown in a lamellar-bilayer soft template at room temperature. The results described in this thesis strongly suggest that [(CdSe)13(n-octylamine)13] is the most thermodynamically stable nanocluster and serves as a key intermediate in the formation …
Power To Appoint: A Model Of Appointments To The United States Federal Judiciary, Alicia Bernice Uribe
Power To Appoint: A Model Of Appointments To The United States Federal Judiciary, Alicia Bernice Uribe
Arts & Sciences Graduate Student Theses and Dissertations
This dissertation project considers judicial appointments in a new light. The project, first, considers how appointments to the United States Federal Judiciary might be thought of differently if the appointment to multiple positions were thought of as interdependent decisions rather than independent decisions. I create a simulation based model that matches judges with vacant positions in the judiciary to see how our expectations of appointments should differ for different levels of the judiciary and in different political environments. I then consider how this approach might translate to other selection mechanisms comparing the selection system for the federal judiciary with other …
The Automatic And Controlled Influence Of Environmental Cues During Recognition Judgments, Diana Selmeczy
The Automatic And Controlled Influence Of Environmental Cues During Recognition Judgments, Diana Selmeczy
Arts & Sciences Graduate Student Theses and Dissertations
Recognition judgments are often made in the context of environmental information, such as instructions or payout regimens that observers have been shown to use in order to adaptively bias their memory judgments. These adaptive biases are usually characterized as a strategic, controlled process that observers adopt intentionally, and this is formalized in signal detection theory wherein strategic criterion placement is assumed fully independent of recognition evidence signals. However, recent pilot research in our laboratory suggests that the ability to regulate recognition decision biases in the context of environmental cues may not be fully controlled by observers suggesting an automatic or …
Mono-N-Acyl-2,6-Diaminopimelic Acid Derivatives: Analysis By Electromigration And Spectroscopic Methods And Examination Of Enzyme Inhibitory Activity, Jan Hlaváček, Miloslava Vítovcová, Petra Sázelová, Jan Pícha, Václav Vaněk, Miloš Buděšínský, Jiří Jiráček, Danuta M. Gillner, Richard C. Holz, Ivan Mikšík, Václav Kašička
Mono-N-Acyl-2,6-Diaminopimelic Acid Derivatives: Analysis By Electromigration And Spectroscopic Methods And Examination Of Enzyme Inhibitory Activity, Jan Hlaváček, Miloslava Vítovcová, Petra Sázelová, Jan Pícha, Václav Vaněk, Miloš Buděšínský, Jiří Jiráček, Danuta M. Gillner, Richard C. Holz, Ivan Mikšík, Václav Kašička
Chemistry Faculty Research and Publications
Thirteen mono-N-acyl derivatives of 2,6-diaminopimelic acid (DAP)—new potential inhibitors of the dapE-encoded N-succinyl-l,l-diaminopimelic acid desuccinylase (DapE; EC 3.5.1.18)—were analyzed and characterized by infrared (IR) and nuclear magnetic resonance (NMR) spectroscopies and two capillary electromigration methods: capillary zone electrophoresis (CZE) and micellar electrokinetic chromatography (MEKC). Structural features of DAP derivatives were characterized by IR and NMR spectroscopies, whereas CZE and MEKC were applied to evaluate their purity and to investigate their electromigration properties. Effective electrophoretic mobilities of these compounds were determined by CZE in acidic and alkaline background electrolytes (BGEs) and by MEKC in acidic and alkaline BGEs …
Contextualized Robot Navigation, David Vincent Lu
Contextualized Robot Navigation, David Vincent Lu
McKelvey School of Engineering Graduate Student Theses & Dissertations
In order to improve the interaction between humans and robots, robots need to be able to move about in a way that is appropriate to the complex environments around them. One way to investigate how the robots should move is through the lens of theatre, which provides us with ways to analyze the robot's movements and the motivations for moving in particular ways. In particular, this has proven useful for improving robot navigation. By altering the costmaps used for path planning, robots can navigate around their environment in ways that incorporate additional contexts. Experimental results with user studies have shown …
The Influence Of Metacommunity Size On Species Diversity Across Spatial Scales, Lauren Woods
The Influence Of Metacommunity Size On Species Diversity Across Spatial Scales, Lauren Woods
Arts & Sciences Graduate Student Theses and Dissertations
This dissertation explores the influence of metacommunity size and landscape level processes, such as dispersal, on species diversity. A metacommunity is a group of local communities, or patches, connected by dispersal, and metacommunity size can be defined as the number of discrete local patches within a metacommunity. In chapter 1, I developed a framework to predict the effects of habitat destruction, or a reduction in metacommunity size, on the species richness of local patches of different sizes by integrating metacommunity theory with the equilibrium theory of island biogeography. The effect of metacommunity size on species richness in small and large …
When Life Happens: Theatres Of Hiv And Complexity In South Africa, Jessica S. Ruthven
When Life Happens: Theatres Of Hiv And Complexity In South Africa, Jessica S. Ruthven
Arts & Sciences Graduate Student Theses and Dissertations
This dissertation examines theatre as part of an artistic movement in South Africa to address the social, structural, and emotional repercussions of HIV, as well as a space in which knowledge about HIV/AIDS is actively created, mediated, reproduced, challenged, and presented for public consumption. Although applied theatre has a long history in the country, I focus on innovation in recent theatrical practices that have occurred as artists and members of broader civil society struggle to understand the trajectory of the country's AIDS epidemic and question the scope of popular national HIV intervention campaigns. I use emerging forms of cultural production …
Characterizing The Fitness Landscapes Of Gut Symbionts In Defined Community And Diet Contexts, Meng Wu
Characterizing The Fitness Landscapes Of Gut Symbionts In Defined Community And Diet Contexts, Meng Wu
Arts & Sciences Graduate Student Theses and Dissertations
A species' niche is the description of all the environmental conditions required to permit a population of that species to persist, including the effects of the population on those conditions. This definition includes the species' resource requirements, as well as stress tolerances and interactions with other species acting as competitors, predators, parasites, and mutualists. The human gut microbiota serves as a microbial `metabolic organ' tasked in part with the biotransformation of many components of our diet. Relatively little is known about the factors that allow members of the human gut microbiota to persist in a habitat that experiences marked changes …
Feeling Doctrine: Religious Meanings Of Emotion In Sixteenth-Century German Literature, Georgia Anna Leeper
Feeling Doctrine: Religious Meanings Of Emotion In Sixteenth-Century German Literature, Georgia Anna Leeper
Arts & Sciences Graduate Student Theses and Dissertations
This dissertation explores the intersections of emotion and Protestant theology in late-16th-century German literature. The project demonstrates the availability of even secular texts to confessional readings through the analysis of representations of emotions. Post-Reformation texts practice an emotional exemplarity that highlights the effects - including the spiritual effects - which emotional experiences have on the individual. I argue that narrative representations of emotions at this moment reflect anxieties about the nebulous nature of faith, and its central role in Protestant salvation. Close readings of widely-read texts such as the 1587 Faustbuch, Melusine, and Hans Sach's Judith: ein Comedi, among others …
Tuning Electronic Correlation With Pressure, Gilberto Fernandes Lopes Fabbris
Tuning Electronic Correlation With Pressure, Gilberto Fernandes Lopes Fabbris
Arts & Sciences Graduate Student Theses and Dissertations
Strongly correlated electron systems display some of the most exotic ground states in condensed matter. In this thesis high pressure is used to tune the degree of electron correlations in systems of current interest. Their electronic and structural properties were investigated at high pressure using x-ray spectroscopy and scattering as well as transport techniques in a diamond anvil cell. The interplay between short- and long-range structural order, one-dimensional charge ordering, and superconductivity was studied in La1.875Ba0.125CuO4. At ambient pressure, this material displays charge ordering at the onset of a low temperature structural phase transition, …
Comparison Of Conventional And Bayesian Analysis For The Ultrasonic Characterization Of Cancellous Bone, Amber Groopman
Comparison Of Conventional And Bayesian Analysis For The Ultrasonic Characterization Of Cancellous Bone, Amber Groopman
Arts & Sciences Graduate Student Theses and Dissertations
This dissertation investigates the physics underlying the propagation of ultrasonic waves in cancellous bone. Although quantitative ultrasound has the potential to evaluate bone quality even better than the current gold standard X-ray based modality, its clinical utility has been hampered by the incomplete understanding of the mechanisms governing the interaction between ultrasound and bone. Therefore, studies that extend the understanding of the fundamental physics of the relationship between ultrasound and trabecular bone tissue may result in improved clinical capabilities.Ultrasonic measurements were carried out on excised human calcaneal specimens in order to study the effects of overlapping fast and slow compressional …
Childhood Poverty And Psychological Health Of Youths In Hong Kong: Mentoring As A Social Capital Intervention, Hor Yan Lai
Childhood Poverty And Psychological Health Of Youths In Hong Kong: Mentoring As A Social Capital Intervention, Hor Yan Lai
Arts & Sciences Graduate Student Theses and Dissertations
Considering that one out of five youths live in poverty in Hong Kong, and poverty is found to have a negative impact on youths' psychological well-being, this dissertation proposes mentoring as a social capital intervention to improve the psychological health of these young people, both who are locally born and who immigrated from Mainland China. In this dissertation, mentoring is defined as a social capital intervention that changes the social resources available to youths living in poverty, and such changes enhance young people's positive psychological outcomes. Based on the social capital theory, poverty-related and psychological theories, three aims were formulated. …
The Influence Of Confucianism On Identity Formation Of A Multi-Skilled Migrant: An Autoethnography, Annabella Fung
The Influence Of Confucianism On Identity Formation Of A Multi-Skilled Migrant: An Autoethnography, Annabella Fung
The Qualitative Report
In this autoethnographical study, I examine how my identities were influenced by Confucianism. Two main Confucian concepts were examined: “selfperfection,” and “filial piety and submissiveness.” As a migrant who left Macau for Australia at fifteen, I have been immersed in diverse cultural climates, experienced gender bias, identity crisis and racial discrimination. I consider all experiences as essential steps of my evolution with ethnographic, interpretative, phenomenological and narrative understandings. This paper introduces the term “seasonal fluctuations” as a way to describe the changing meanings of my lived experiences that were interrogated by my three distinctive personalities: The Writer, The Interpreter and …
Connecting The Dots: A Review Of Norman K. Denzin's Interpretive Autoethnography, Victoria Landu
Connecting The Dots: A Review Of Norman K. Denzin's Interpretive Autoethnography, Victoria Landu
The Qualitative Report
The interpretive autoethnography by Denzin (2014) described the interpretive autoethnography as a biographical study of life experiences and performance of a person. Using examplars, the author tried to connect the dots between lives, performance, the epiphany and its’ interpretation. It also explained strategies to conducting interpretive autoethnography. The book defined several genealogies of terms which helped to broaden the understanding of the explanation of process and performance in autoethnography. The book presented some of the pitfalls to avoid when conducting interpretive autoethnography. Defining several genealogies of terms, the book explained process and performance in autoethnographic study.