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2012

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Use Of Two-Dimensional Agarose-Gel Analysis To Characterize Processing Of Uv-Irradiated Plasmids And The Composition Of The Replisome Following Uv-Induced Arrest, Harout Arthur Jeiranian Jan 2012

Use Of Two-Dimensional Agarose-Gel Analysis To Characterize Processing Of Uv-Irradiated Plasmids And The Composition Of The Replisome Following Uv-Induced Arrest, Harout Arthur Jeiranian

Dissertations and Theses

In this thesis, I address two fundamental questions related to our understanding of how DNA damage is processed and repaired during replication. Using Two-dimensional (2-D) agarose gel analysis, I first examine whether DNA damage on plasmids introduced by transformation is processed in a manner similar to that observed on endogenously replicating plasmids and the chromosome. The original intent for using this approach was to develop a technique that could examine how different DNA adducts would be repaired in various sequence contexts. However, I found that distinct differences exist between the processing of DNA damage on transforming plasmids and the chromosome. …

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Causes And Consequences Of Mitochondrial Variation In Caenorhabditid Nematodes, Kiley Ann Hicks Jan 2012

Causes And Consequences Of Mitochondrial Variation In Caenorhabditid Nematodes, Kiley Ann Hicks

Dissertations and Theses

Mitochondria are dynamic organelles that harbor their own stream-lined genome and generate much of the ATP necessary to sustain eukaryotic life via an electron transport chain (ETC). Because of the central role for mitochondria in organismal physiology, mitochondrial genetic and phenotypic variation can alter organismal fitness and affect population genetic and evolutionary outcomes. Despite the far-reaching relevance of mitochondria to evolutionary processes and human health, we lack a basic understanding of the causes and consequences of mitochondrial genetic and phenotypic variation. In this thesis, I quantified mitochondrial reactive oxygen species (ROS), membrane potential (δΨM), and mitochondrial morphological traits within Caenorhabditis …

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The Influence Of Late Registration On Academic Outcomes And Retention At A Multi-Campus Community College, Kathy John Maalouf Jan 2012

The Influence Of Late Registration On Academic Outcomes And Retention At A Multi-Campus Community College, Kathy John Maalouf

Counseling & Human Services Theses & Dissertations

In response to the increasing challenge for community colleges to uphold their mission of accessibility with an open door policy, while being held accountable for student success, higher education administrators and counselors need to have a better comprehension on the relationship among community college students, institutional enrollment policies, and academic success. The overall purpose of study was to broaden the understanding of the implications of late registration policy on community college students. Specifically, the purpose was to (1) investigate if there are statistical relationships between the demographics of community college students, registration behaviors, academic outcome, and retention (2) identify possible …

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"With All Due Respect, Mr. President:" A Rhetorical Analysis Of Al Sharpton's Speech Ot The 2004 Democratic National Committee Convention, Jennifer E. Potter Jan 2012

"With All Due Respect, Mr. President:" A Rhetorical Analysis Of Al Sharpton's Speech Ot The 2004 Democratic National Committee Convention, Jennifer E. Potter

Iowa Journal of Communication

On July 23, 2004, President George W Bush spoke to the National Urban League and questioned African Americans' allegiance to the Democratic Party. Two days later, the 2004 DNC convention began and Al Sharpton, previously known as an unbelievable politician, gave a memorable speech responding to the President. This essay explains how Sharpton delivered a speech that appealed to the broader American electorate while still speaking about issues important to the African American community and exposes how Sharpton discussed race without doing so blatantly, all the while answering Bush's questions posed to the Urban League.

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The Lived Experience Of High School Policy Debate In Oregon, Ameena Annamaria Amdahl-Mason Jan 2012

The Lived Experience Of High School Policy Debate In Oregon, Ameena Annamaria Amdahl-Mason

Dissertations and Theses

This study seeks to explore the lived experience of competitors in high school level Oregon Style Cross-Examination Policy Debate in the state of Oregon. To elucidate this experience, between fifteen former competitors, graduating between 2003 and 2010, were interviewed in order to find common themes within the interviewees' experiences. The common themes that emerged from the interviews included establishing a knowledge base, the ability to research, effective use of communication skills, the development of confidence, and political awareness.

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Groundwater Surface Trends In The North Florence Dunal Aquifer, Oregon Coast, Usa, Sarah Rebecca Doliber Jan 2012

Groundwater Surface Trends In The North Florence Dunal Aquifer, Oregon Coast, Usa, Sarah Rebecca Doliber

Dissertations and Theses

The North Florence Dunal Aquifer is the only feasible source for drinking water for the coastal city of Florence, Oregon and Florence's Urban Growth Boundary. High infiltration rates and a shallow groundwater table leave the aquifer highly susceptible to contamination from septic tank effluent, storm runoff, chemical fertilizers and recreational ATV use throughout the dunes. Public interest in the quality and quantity of the aquifer water has been sparked since the City of Florence received a grant from the Environmental Protection Agency for a watershed protection and restoration project. Delineation of the shallow groundwater surface and its relationship to the …

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Understanding Sand Mining On The Maha Oya: The Conflict Between Economic And Environmental Survival, Meredith Corea Talbert Jan 2012

Understanding Sand Mining On The Maha Oya: The Conflict Between Economic And Environmental Survival, Meredith Corea Talbert

Dissertations and Theses

River sand mining from the Maha Oya is the main source of income and a force that drives economic activity for residents along the river. This study takes place in Sri Lanka, there are three villages included in this project: Jambugaswatte, Janituspuraya and Thoppuwa. In Sri Lanka, sand serves as the main building material. It is used to make bricks, tiles, asphalt and concrete, therefore demanding a high market value. However, the over-extraction of sand comes along with significant environmental problems. These communities depend on the river in many ways and the health of the river directly corresponds to the …

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Reservoir Evolution Following The Removal Of Marmot Dam On The Sandy River, Oregon, Mackenzie Karli Keith Jan 2012

Reservoir Evolution Following The Removal Of Marmot Dam On The Sandy River, Oregon, Mackenzie Karli Keith

Dissertations and Theses

The October 2007 removal of Marmot Dam, a 14.3-m-tall dam on the Sandy River in northwestern Oregon storing approximately 730,000 m3 of impounded sediment, provided an opportunity to study short- and long-term geomorphic effects of dam removal. Monitoring reservoir morphology during the two years following dam decommissioning yields a timeline of reservoir channel change. Comparison of a pre-dam survey in 1911 with post-removal surveys provides a basis from which to gage the Reservoir Reach evolution in the context of pre-dam conditions. Analyses of time-lapse photography, topographic surveys, and repeat LiDAR data sets provide detailed spatial and temporal documentation of a …

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Human Trafficking And Slavery: Towards A New Framework For Prevention And Responsibility, Dana S. Hathaway Jan 2012

Human Trafficking And Slavery: Towards A New Framework For Prevention And Responsibility, Dana S. Hathaway

Dissertations and Theses

Human trafficking and slavery are horrific crimes that require strict penalties for perpetrators and effective protections for survivors, but these crimes are in part facilitated by a system of laws and norms that effectively marginalize certain populations--the "unskilled" migrant. In this thesis I aim to reexamine and reinterpret the problem of human trafficking and slavery in a way that highlights the background conditions to the problem. I argue that the framework used as a conceptual foundation for addressing the problem limits the scope of responsibility. Specifically, the framework fails to acknowledge structural contributing factors I show to be relevant: law, …

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Agency, Consolidation, And Consequence: Evaluating Social And Political Change In New Orleans, 1868-1900, Christopher Joseph Cook Jan 2012

Agency, Consolidation, And Consequence: Evaluating Social And Political Change In New Orleans, 1868-1900, Christopher Joseph Cook

Dissertations and Theses

In the last twenty years, recent scholarship has opened up fresh inquiry into several aspects of New Orleans society during the late nineteenth century. Much work has been done to reassess the political and cultural involvement, as well as perspective of, the black Creoles of the city; the successful reordering of society under the direction of the Anglo-Protestant elite; and the evolution of New Orleans's social conditions and cultural institutions during the period initiating Jim Crow segregation. Further exploration, however, is necessary to make connections between each of these avenues of study. This thesis relies on a variety of secondary …

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Toward The Complete Characterization Of Atmospheric Organic Particulate Matter: Derivatization And Two-Dimensional Comprehensive Gas Chromatography/Time Of Flight Mass Spectrometry As A Method For The Determination Of Carboxylic Acids, Alexandra Jeanne Boris Jan 2012

Toward The Complete Characterization Of Atmospheric Organic Particulate Matter: Derivatization And Two-Dimensional Comprehensive Gas Chromatography/Time Of Flight Mass Spectrometry As A Method For The Determination Of Carboxylic Acids, Alexandra Jeanne Boris

Dissertations and Theses

Understanding the composition of atmospheric organic particulate matter (OPM) is essential for predicting its effects on climate, air quality, and health. However, the polar oxygenated fraction (PO-OPM), which includes a significant mass contribution from carboxylic acids, is difficult to speciate and quantitatively determine by current analytical methods such as gas chromatography-mass spectrometry (GC-MS). The method of chemical derivatization and two-dimensional GC with time of flight MS (GC×GC/TOF-MS) was examined in this study for its efficacy in: 1) quantifying a high percentage of the total organic carbon (TOC) mass of a sample containing PO-OPM; 2) quantitatively determining PO-OPM components including carboxylic …

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Community Earth System Model: Implementation, Validation, And Applications, William Christian Porter Jan 2012

Community Earth System Model: Implementation, Validation, And Applications, William Christian Porter

Dissertations and Theses

The Community Earth System Model (CESM) is a coupling of five different models which are combined to simulate the dynamic interactions between and within the Earth's atmosphere, ocean, land, land-ice, and sea-ice. In this work, the installation and testing of CESM on Portland State University's Cluster for Climate Change and Aerosol Research (CsAR) is described and documented, and two research applications of the model are performed. First, the improved treatment of cloud microphysics within recent versions of CESM's atmospheric module is applied to an examination of changes in shortwave cloud forcing (SWCF) and results are compared to output from older …

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Atheist Scripts In A Nation Of Religiosity: Identity Politics Within The Atheist Movement, Jacqueline Frost Jan 2012

Atheist Scripts In A Nation Of Religiosity: Identity Politics Within The Atheist Movement, Jacqueline Frost

Dissertations and Theses

This thesis explores the use of identity politics within the atheist movement at both the national and individual levels. I conducted a content analysis of two national atheist groups and three best-selling atheist authors in order to assess the use of atheist identity politics at the national level. I then conducted 15 in-depth interviews with a sample of atheists in Portland, Oregon about their atheist identity and their reactions to and identification with national atheist movement strategies. Findings suggest that national atheist organizations and atheist authors are using a strategy of identity politics that encourage atheists to "come out" as …

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Examining The Effect Of Maternal High-Fat Diet Consumption On The Physiology And Pancreas Development Of Fetal And Juvenile Nonhuman Primate Offspring, Sarah Michelle Comstock Jan 2012

Examining The Effect Of Maternal High-Fat Diet Consumption On The Physiology And Pancreas Development Of Fetal And Juvenile Nonhuman Primate Offspring, Sarah Michelle Comstock

Dissertations and Theses

The purpose of these studies was to investigate the impact of high-fat diet (HFD) exposure during pregnancy and the early post-natal period on fetal and post-natal development of the endocrine pancreas of the Japanese macaque. Specifically I hypothesized that the HFD would alter islet morphology and lead to disturbances in glucose homeostasis in these animals. Adult female Japanese macaques were placed on either a control (CTR) or HFD diet for 4 years. Fetuses were collected at gestational day 130 (G130), while other offspring from the CTR and HFD mothers were carried to term. After birth, infant animals were maintained with …

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A Systems Approach To Ecological Economic Models Developed Progressively In Three Interwoven Articles, Takuro Uehara Jan 2012

A Systems Approach To Ecological Economic Models Developed Progressively In Three Interwoven Articles, Takuro Uehara

Dissertations and Theses

My dissertation develops and analyzes ecological economic models to study the complex dynamics of an ecological economic system (EES) and investigate various conditions and measures which can sustain a developing economy over the long term in view of resilience and sustainability. Because of the intrinsic complexity of the system, I take a systems approach, using economics as the foundation for the basic structure of an ecological economic model, and system dynamics as the method to build and analyze such a complex ecological economic model. Throughout my dissertation, the model developed by Brander and Taylor (1998) is adopted as a baseline …

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Sustainability Education As A Framework For Enhancing Environmental Stewardship In Young Leaders: An Intervention At Tryon Creek Nature Day Camp, Andrea Nicole Lawrence Jan 2012

Sustainability Education As A Framework For Enhancing Environmental Stewardship In Young Leaders: An Intervention At Tryon Creek Nature Day Camp, Andrea Nicole Lawrence

Dissertations and Theses

UNESCO established Sustainability Education as a top priority when it declared 2005 - 2014 to be the global decade for sustainability. Sustainability education can be implemented in outdoor programs such as nature summer camps in order to build environmental stewardship and ecological literacy in counselors and campers. This study sought to determine the extent to which an ecology and leadership training given to assistant counselors at Tryon Creek State Natural Area day camp achieved the goals of sustainability education--for the assistant counselors to learn about ecology, develop stewardship attitudes and behaviors toward the environment, and become positive role models for …

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Late Pleistocene And Holocene Aged Glacial And Climatic Reconstructions In The Goat Rocks Wilderness, Washington, United States, Joshua Andrews Heard Jan 2012

Late Pleistocene And Holocene Aged Glacial And Climatic Reconstructions In The Goat Rocks Wilderness, Washington, United States, Joshua Andrews Heard

Dissertations and Theses

Eight glaciers, covering an area of 1.63 km2, reside on the northern and northeastern slopes of the Goat Rocks tallest peaks in the Cascades of central Washington. At least three glacial stands occurred downstream from these glaciers. Closest to modern glacier termini are Little Ice Age (LIA) moraines that were deposited between 1870 and 1899 AD, according to the lichenometric analysis. They are characterized by sharp, minimally eroded crests, little to no soil cover, and minimal vegetation cover. Glacier reconstructions indicate that LIA glaciers covered 8.29 km2, 76% more area than modern ice coverage. The average LIA equilibrium line altitude …

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At The End Of The Peninsula, Jonathan David Fine Jan 2012

At The End Of The Peninsula, Jonathan David Fine

Dissertations and Theses

In 1865, a settler named James John laid out a small neighborhood at the end of the north Portland peninsula, near the confluence of the Willamette and Columbia Rivers. For a half century, until its annexation to Portland in 1915, St. Johns was an independent municipality. Factories lined the waterfront, and a full complement of businesses in the small downtown area--grocers, bakers, hardware stores, clothing shops--catered to all the residents' needs. St. Johns was always a working-class town with a strong sense of identity. But after World War II, as Portland grew, St. Johns began to seem defined less by …

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Exploring Ethnic Differences In The Predictors And Outcomes Of Academic Engagement During Middle School, Robin Margarett Johnson Jan 2012

Exploring Ethnic Differences In The Predictors And Outcomes Of Academic Engagement During Middle School, Robin Margarett Johnson

Dissertations and Theses

Guided by a motivational framework derived from self-determination theory, a study was conducted to examine the role of academic engagement in helping to explain and ameliorate ethnic differences in school achievement. Building on decades of research that documents both the importance of engagement to learning in European American students as well as its malleability, this study relied on an ethnically diverse sample of 6th and 7th grade students to examine three questions (1) Are achievement differences across ethnic groups due to differences in engagement? (2) Does engagement predict achievement similarly or differently across ethnic groups? and (3) Are the predictors …

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Fluorescence Detection Of Biological Thiols, Yixing Guo Jan 2012

Fluorescence Detection Of Biological Thiols, Yixing Guo

Dissertations and Theses

Glutathione (GSH) is an important biological thiol, it performs significant biological functions such as serving an antioxidant which protect cells from oxidative stress by trapping free radicals which damage DNA and RNA. It is known that abnormal plasma levels of GSH have been linked to various human diseases. Therefore, the rapid, sensitive and highly selective detection of GSH is of great importance for investigating its functions in diseases diagnosis. Interestingly, we found in cetyl trimethylammonium bromide (CTAB) medium, the resorufin-based probe shows an extremely fast, highly selective response to GSH. The result indicates that this dye can be employed to …

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Electronic Properties And Structure Of Functionalized Graphene, Pavel Plachinda Jan 2012

Electronic Properties And Structure Of Functionalized Graphene, Pavel Plachinda

Dissertations and Theses

The trend over the last 50 years of down-scaling the silicon transistor to achieve faster computations has led to doubling of the number of transistors and computation speed over about every two years. However, this trend cannot be maintained due to the fundamental limitations of silicon as the main material for the semiconducting industry. Therefore, there is an active search for exploration of alternate materials. Among the possible candidates that can may [sic] be able to replace silicon is graphene which has recently gained the most attention. Unique properties of graphene include exceedingly high carrier mobility, tunable band gap, huge …

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Finding The Past In The Present: Modeling Prehistoric Occupation And Use Of The Powder River Basin, Wyoming, Catherine Anne Clark Jan 2012

Finding The Past In The Present: Modeling Prehistoric Occupation And Use Of The Powder River Basin, Wyoming, Catherine Anne Clark

Dissertations and Theses

In the Powder River Basin of Wyoming, our nation's interest in protecting its cultural heritage collides with the high demand for carbon fuels. "Clinker" deposits dot the basin. These distinctive buttes, created by the underground combustion of coal, are underlain by coal veins; they also provided the main lithic resources for prehistoric hunter-gatherers. These deposits signify both a likelihood of extractable carbon and high archaeological site density. Federal law requires that energy developers must identify culturally significant sites before mining can begin. The research presented here explains the need for and describes a statistical tool with the potential to predict …

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Metabolic Support Of Anaerobiosis In Embryos Of The Annual Killifish Austrofundulus Limnaeus, Andrew Mccracken Jan 2012

Metabolic Support Of Anaerobiosis In Embryos Of The Annual Killifish Austrofundulus Limnaeus, Andrew Mccracken

Dissertations and Theses

Embryos of the annual killifish Austrofundulus limnaeus display a remarkable tolerance to anoxia during development, most notably during embryonic diapause. Little is known about the metabolic or enzymatic changes that accompany this state of anoxia tolerance. This study examined the metabolic changes associated with exposure to anoxia by measuring the activity of the enzyme phosphoenolpyruvate carboxykinase (PEPCK), and by profiling the concentration of 31 metabolites ranging from amino acids to citric cycle intermediates at 4 different developmental stages, diapause 2 (DII), 4 days post diapause (dpd), 12 and 22 dpd. Embryos of A. limnaeus showed stage specific changes in concentrations …

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Euthanasia, The Ethics Of Patient Care And The Language Of Propaganda, Elizabeth Maria Krapf Jan 2012

Euthanasia, The Ethics Of Patient Care And The Language Of Propaganda, Elizabeth Maria Krapf

Dissertations and Theses

This thesis is an examination of euthanasia, eugenics, the ethic of patient care, and linguistic propaganda in the Second World War. The examination of euthanasia discusses not only the history and involvement of the facility at Hadamar in Germany, but also discuss the current euthanasia debate. Euthanasia in World War II arose out of the Nazi desire to cleanse the Reich and was greatly influenced by the American eugenics movement of the early 20th century. Eugenics was built up to include anyone considered undesirable and unworthy of life and killed many thousands of people before the invasion of allied troops …

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Coping With Interpersonal Conflicts At Work: An Examination Of The Goodness Of Fit Hypothesis Among Nurses, Robert Randon Wright Jan 2012

Coping With Interpersonal Conflicts At Work: An Examination Of The Goodness Of Fit Hypothesis Among Nurses, Robert Randon Wright

Dissertations and Theses

Increasingly, evidence indicates that workplace interpersonal conflicts (WIC) are the most upsetting/troublesome daily work stressors (Sulsky & Smith, 2007), and within the context of nursing, WIC is a problem of high prevalence and intensity (Baltimore, 2006; Farrell, 1999). In relation to coping with stressors such as WIC, Lazarus and Folkman (1984) established the transactional model of stress and coping, where cognitive appraisals of the stressor (e.g., perceived control) are central to coping and classified all coping behaviors as either problem-focused or emotion-focused. They also proposed the "goodness of fit hypothesis", which predicts that problem-focused coping efforts used to cope with …

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Social Job Characteristics And Older Workers: Effects On Job Satisfaction And Job Tension, Jennifer Rae Rineer Jan 2012

Social Job Characteristics And Older Workers: Effects On Job Satisfaction And Job Tension, Jennifer Rae Rineer

Dissertations and Theses

The workforce in most industrialized countries is aging and becoming more age diverse, but few studies have examined the implications of age differences in the design of jobs. This study examined the role of age as a moderator in the relationship between job characteristics and two individual outcomes, job satisfaction and job tension. Specifically, the study focused on the relationship between social characteristics of the job (given social support, [received] social support, interdependence, interaction outside the organization, and feedback from others) and job tension and job satisfaction among Portland Water Bureau employees. Based in Socioemotional Selectivity (SES) theory (Carstensen, 1991), …

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Exploring Support Network Structure, Content, And Stability As Youth Transition From Foster Care, Jennifer E. Blakeslee Jan 2012

Exploring Support Network Structure, Content, And Stability As Youth Transition From Foster Care, Jennifer E. Blakeslee

Dissertations and Theses

Many older youth in foster care lack adequate resources and ongoing support in their social networks as they transition into young adulthood, while other youth in these circumstances experience stable social networks providing comprehensive support. Systematically measuring the supportive personal and service-oriented relationships in youth networks expands the scope of inquiry in this area by identifying patterns of social network structure, member composition, and relational qualities that are associated with more or less support provision through formal and informal relationships. These can also be measured over time to observe changes in network form and content and assess network stability. This …

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Involvement In The Online Autistic Community, Identity, Community, And Well-Being, Colleen Anne Kidney Jan 2012

Involvement In The Online Autistic Community, Identity, Community, And Well-Being, Colleen Anne Kidney

Dissertations and Theses

The values of the disability rights movement and community psychology promote research that focuses on improving the lives of individuals with disabilities (Dowrick & Keys, 2001). Using the Internet for social interactions has been shown to contribute to an individual's identity development, sense of community, and well-being (Obst, Zinkiewicz, & Smith, 2002a; Turkle, 1995). While challenges in typical social interactions have traditionally been considered a defining feature of autism spectrum disorder, autistic individuals have taken advantage of the Internet to develop social interactions (Blume, 1997a). The present study focused on the online Autistic community and how the importance and value …

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Scale Invariant Object Recognition Using Cortical Computational Models And A Robotic Platform, Danny Voils Jan 2012

Scale Invariant Object Recognition Using Cortical Computational Models And A Robotic Platform, Danny Voils

Dissertations and Theses

This paper proposes an end-to-end, scale invariant, visual object recognition system, composed of computational components that mimic the cortex in the brain. The system uses a two stage process. The first stage is a filter that extracts scale invariant features from the visual field. The second stage uses inference based spacio-temporal analysis of these features to identify objects in the visual field. The proposed model combines Numenta's Hierarchical Temporal Memory (HTM), with HMAX developed by MIT's Brain and Cognitive Science Department. While these two biologically inspired paradigms are based on what is known about the visual cortex, HTM and HMAX …

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Fundamental Properties Of Functional Zinc Oxide Nanowires Obtained By Electrochemical Method And Their Device Applications, Athavan Nadarajah Jan 2012

Fundamental Properties Of Functional Zinc Oxide Nanowires Obtained By Electrochemical Method And Their Device Applications, Athavan Nadarajah

Dissertations and Theses

We report on the fundamental properties and device applications of semiconductor nanoparticles. ZnO nanowires and CdSe quantum dots were used, prepared, characterized, and assembled into novel light-emitting diodes and solar cells. ZnO nanowire films were grown electrochemically using aqueous soluble chloride-based electrolytes as precursors at temperatures below 90° C. Dopants were added to the electrolyte in the form of chloride compounds, which are AlCl3, CoCl2, CuCl2, and MnCl2. The optical, magnetic, and structural properties of undoped and transition-metal-ion doped ZnO nanowires were explored. Our results indicate that the as-grown nanowire structures have …

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