Digital Commons Network^™

Characterization Of Photonic Waveguides Using Fourier Analysis, Sam Olson

University Honors Theses

In this work, several characteristics of indium tin oxide (ITO) thin-film waveguides are analyzed. The simulation software COMSOL Multiphysics is used to create two waveguide models, one with a single 400 nm diameter hole, and one with two 400 nm diameter holes. A 410 nm light source is incident upon the models at an angle of 60° from the normal. Fourier analysis performed upon the normalized electric field at the surface led to effective indices in the waveguide of about 1.76 and 2.05.

Mindfulness-Based Stress Reduction (Mbsr) As An Alternative Therapy For Chronic Pain, Kayla Ohlgren

University Honors Theses

This thesis discusses the possibility of Mindfulness-Based Stress Reduction (MBSR) as an alternative therapy for chronic pain in contrast to traditional medical care. It examines 18 peer-reviewed scholarly articles and identifies benefits for chronic pain patients in terms of pain severity, quality of life, psychological distress, and duration of benefits. This thesis also identifies practical benefits of MBSR such as cost, implementation, no negative side effects, and the creation of life-long skills to be used after treatment has ended. In conclusion, there is a significant gap in the current academic literature pertaining to chronic pain patients who are minorities, men, …

Trust & Growth In The Workplace: An Analysis Of Leadership In Flat Organizations, Drake George

University Honors Theses

Management styles affect the overall performance of employees and the growth of a business. Intertwined with leadership are the concepts of trust and credibility in relation to the success of a business and the satisfaction of employees and customers. A leader’s ability to adapt their management style to forecast changes in their industry strengthens their command of the business, and can establish trust. The overall challenge of transparency is that it is multifaceted. Trust from employees to leadership, trust from leadership to employees and trust from consumer to business all play a large role in establishing honest business practices. Through …

Perceived Addiction To Pornography, Level Of Distress And Their Correlates, Paul Grimes

University Honors Theses

Negative psychological states such as distress, shame and depression have been linked to problematic porn use. This is a proposal for a study that seeks to identify if perceived addiction to pornography and stress are correlated. In addition to this perceived addiction to porn, other perceived addictions (food, sex, alcohol, marijuana and cigarettes) will be tested to determine the level of comorbidity of addictions in people. The hypothesis of this study is: People that perceive themselves as having pornography addiction will have higher rates of other perceived addictions than those who do perceive themselves to be addicted to pornography; in …

The Ethics And Evolution Of Library Information Sharing: Lessons From Interlibrary Loan Services For Library Open Access Publishing, Beth Posner

Publications and Research

One of the most essential missions of academic research libraries is to facilitate access to information. Librarians do this by sharing their print collections, as well as digital information, with members of their local communities. They also share this information, with each other, through interlibrary loan (ILL) services.

A fundamental belief in the mission of information access and the value of sharing information is why so many librarians also support the open access movement. In addition to this shared mission and value, there are also lessons the open access movement can learn by exploring how traditional ILL services – and …

Teaching Music History With Your Mouth Shut, Anne Stone

Publications and Research

No abstract provided.

Cryptography With Right-Angled Artin Groups, Ramon Flores, Delaram Kahrobaei

Publications and Research

In this paper we propose right-angled Artin groups as a platform for secret sharing schemes based on the efficiency (linear time) of the word problem. Inspired by previous work of Grigoriev-Shpilrain in the context of graphs, we define two new problems: Subgroup Isomorphism Problem and Group Homomorphism Problem. Based on them, we also propose two new authentication schemes. For right-angled Artin groups, the Group Homomorphism and Graph Homomorphism problems are equivalent, and the later is known to be NP-complete. In the case of the Subgroup Isomorphism problem, we bring some results due to Bridson who shows there are right-angled Artin …

The Conflict Resolution Case Study In Urban Life: Bull Run Watershed Case, Chang-Yu Hong

Geography Faculty Publications and Presentations

The City of Portland and the United States Department of Agriculture (USDA) Forest Service are working together, along with citizens, to formulate a comprehensive new policy to guide joint management of the Bull Run watershed at Mt. Hood National Forest. This process has brought about four decades of conflict, resulting from differences between the federal view of multiple use and the local view of exclusive use for producing high quality water. The new policy is being formulated by the City of Portland and the Forest Service through negotiation of a comprehensive Memorandum of Understanding that structures the parties’ roles, responsibilities, …

Hedging Default And Price Risks In Commodity Trading, Norifumi Kimura

Agribusiness and Applied Economics

Many risk factors exist in the commodity markets, especially those related to price and quantity. Recently, the risk of counterparty default has been increasing. The purpose of this study is to develop a portfolio-hedging model to hedge both price and default risks using exchange traded commodity futures and option contracts. Two approaches are taken to determine the optimal hedge ratios (HR) using futures and options: an analytical approach that mathematically derives closed-form mean-variance (E-V) maximizing solutions, and an empirical approach that uses stochastic optimization and Monte Carlo simulation under mean-value-at-risk (E-VaR) framework. Based on the analytical approach, we proved that …

The Risks Associated With Barley Production In North Dakota, Bernt Louis Nelson

Agribusiness and Applied Economics

The market for barley has shifted from a demand for exports and livestock feed, to a demand for human food and alcohol production. Due to the crop qualities required for malting in the alcohol industry, barley is perceived to be a more financially risky crop to grow in comparison to other crops. Monte Carlo simulation was used to estimate the distributions of net return to labor and management for barley, hard red spring wheat, corn, soybean, and canola in the primary, North Central, and transitional, Central, crop reporting districts of North Dakota. Stochastic efficiency with respect to a function was …

A Single Dose Tmv-Ha Vaccine Protects Mice From H5n1 Influenza Challenge, Jyothi K. Mallajosyula, Trushar Jeevan, Rachel Chikwamba, Richard J. Webby, Alison A. Mccormick

Faculty Publications & Research of the TUC College of Pharmacy

Recombinant subunit vaccines are an efficient strategy to meet the demands of a possible influenza pandemic, because of rapid and scalable production. However, vaccines made from recombinant Hemagglutinin (HA) subunit protein are often of low potency, requiring repeated boosting to generate a sustained immune response. Previously, we demonstrated improved immunogenicity of a plant-made H1 Hemagglutinin (HA) vaccine by chemical conjugation to the surface of the Tobacco Mosaic Virus (TMV) which is non infectious in mammals. Antigen coated TMV is taken up by mammalian dendritic cells and is a highly effective antigen carrier for subunit protein vaccines. In this work, we …

The Importance Of The Artist's Intent, Daniel Conrad

Contemporary Aesthetics (Journal Archive)

Does considering artists' aesthetic intentions enrich our experience of art and enhance art’s aggregate value for human culture? By examining non-aesthetic intent, working motivations, biographical/historical context, and cases in which an announced intent drives aesthetic transformation, I argue that, while its specific value varies from case to case, aesthetic intent is a key part of our cumulative experience of art, correlates with specific neuroanatomical loci, and raises interesting and compelling questions specific to this age of automatized thinking.

Evolutionary Escalation: The Bat–Moth Arms Race, John M. Ratcliffe

Dartmouth Scholarship

Echolocation in bats and high-frequency hearing in their insect prey make bats and insects an ideal system for studying the sensory ecology and neuroethology of predator–prey interactions. Here, we review the evolutionary history of bats and eared insects, focusing on the insect order Lepidoptera, and consider the evidence for antipredator adaptations and predator counter-adaptations. Ears evolved in a remarkable number of body locations across insects, with the original selection pressure for ears differing between groups. Although cause and effect are difficult to determine, correlations between hearing and life history strategies in moths provide evidence for how these two variables influence …

Regional Federal Administration, Dave Owen

Faculty Scholarship

No abstract provided.

Chinese Love Stories From Ch'ing-Shih, Hua-Yuan Li Mowry, Menglong Feng

Dartmouth Scholarship

About the Book

Ch'ing-shih is a lovingly made anthology of love stories, provided we push the limits of definition of "love story" just a little wider than they are usually set. The stories are classified into twenty-four major categories, each further divided into subsections and concluded with a paragraph of commentary. Professor Mowry provides a sampling of the contents of each category but not of each subsection, though the headings themselves are enough to pique our curiosity: shall we turn next to "incomplete resurrections," or "unusual degenerates"? The stories were collected in the early seventeenth century, just a decade or …

Functional Mechanisms Underlying Pleiotropic Risk Alleles At The 19p13.1 Breast–Ovarian Cancer Susceptibility Locus, Kate Lawrenson, Siddhartha Kar, Karen Mccue, Karoline Kuchenbaeker, Kyriaki Michailidou, Jonathan Tyrer, Jonathan Beesley, Susan J. Ramus, Qiyuan Li, Melissa K. Delgado, Janet M. Lee, Kristiina Aittomäki, Irene L. Andrulis, Hoda Anton-Culver, Volker Arndt, Banu K. Arun, Brita Arver, Elisa V. Bandera, Monica Barile, Rosa B. Barkardottir, Daniel Barrowdale, Matthias W. Beckmann, Javier Benitez, Andrew Berchuck, Maria Bisogna, Line Bjorge, Carl Blomqvist, William Blot, Natalie Bogdanova, Anders Bojesen, Stig E. Bojesen, Manjeet K. Bolla, Bernardo Bonanni, Anne-Lise Børresen-Dale, Hiltrud Brauch, Paul Brennan, Hermann Brenner, Fionna Bruinsma, Joan Brunet, Shaik Ahmad Buhari, Barbara Burwinkel, Ralf Butzow, Sandra S. Buys, Qiuyin Cai, Trinidad Caldes, Ian Campbell, Rikki Canniotto, Jenny Chang-Claude, Jocelyne Chiquette, Ji-Yeob Choi, Kathleen B.M Claes, Gemo Study Collaborators, Linda S. Cook, Angela Cox, Daniel W. Cramer, Simon S. Cross, Cezary Cybulski, Kamila Czene, Mary B. Daly, Francesca Damiola, Agnieszka Dansonka-Mieszkowska, Hatef Darabi, Joe Dennis, Peter Devilee, Orland Diaz, Jennifer A. Doherty

Dartmouth Scholarship

A locus at 19p13 is associated with breast cancer (BC) and ovarian cancer (OC) risk. Here we analyse 438 SNPs in this region in 46,451 BC and 15,438 OC cases, 15,252 BRCA1 mutation carriers and 73,444 controls and identify 13 candidate causal SNPs associated with serous OC (P = 9.2 X 10^-20), ER-negative BC (P = 1.1 X 10^-13), BRCA1 -associated BC (P = 7.7 X 10^-16) and triple negative BC (P-diff = 2 X 10^-5). Genotype-gene expression associations are identified for candidate target genes ANKLE1 (P = 2 X 10^{-3 …}

Effects Of Maternal Nutrition On Fructose, Glucose, And Cationic Amino Acid Transporter Expression In Bovine Utero-Placental Tissues From Days 16 To 50 Of Gestation, Matthew Scott Pennell Crouse

Animal Sciences

Poor Maternal nutrition has been implicated to reduce nutrient transport to the conceptus. Therefore, we hypothesized that maternal nutrition and day of gestation would impact mRNA expression of nutrient transporters GLUT1, GLUT3, GLUT5, GLUT14, CAT-1, CAT-2, and CAT-3 in beef heifers. Crossbred Angus heifers (n = 49) were bred via AI, assigned to nutritional treatment (CON = 100% of requirements for 0.45 kg/d gain and RES = 60% of CON) and ovariohysterectomized on d 16, 34, or 50 of gestation. Expression of CAT-2 was the only gene in any tissue to demonstrate a day × treatment interaction. Expression of nutrient …

Does Beef Inclusion In A Modern American Diet Influence Risk Factors For Obesity-Related Metabolic Disorders Via A Swine Biomedical Model, Alexis Michelle Siomka

Animal Sciences

Using swine as a model for humans, this study was conducted to determine if replacing the sugar present in the average American diet (SUG) with ground beef (GB) would alter developmental body composition, onset of puberty, and risk factors for obesity-related metabolic disorders. Twenty-four Berkshire gilts of common age and sire line were obtained at weaning, assigned to one of two dietary treatments (SUG vs. GB), and pair-fed at an average of 3.7 % body weight for 93 d. Over time, GB gilts had superior body weight gain (P < 0.01), larger cross-sectional longissimus muscle area (P < 0.0001), less subcutaneous fat depth (P = 0.0005), and greater percentage lean body mass (P < 0.0001) than SUG. Reproductive tracts were prepubertal across treatments; however, follicular development was observed in GB gilts. Sodium, hematocrit, hemoglobin, and insulin-like growth factor 1 were higher and ionic calcium lower for GB compared to SUG gilts.

Pharmacology Of Dextromethorphan: Relevance To Dextromethorphan/Quinidine (Nuedexta®) Clinical Use, Charles P. Taylor, Stephen F. Traynelis, Joao Siffert, Laura E. Pope, Rae Reiko Matsumoto

Faculty Publications & Research of the TUC College of Pharmacy

Dextromethorphan (DM) has been used for more than 50 years as an over-the-counter antitussive. Studies have revealed a complex pharmacology of DM with mechanisms beyond blockade of N-methyl-D-aspartate (NMDA) receptors and inhibition of glutamate excitotoxicity, likely contributing to its pharmacological activity and clinical potential.

DM is rapidly metabolized to dextrorphan, which has hampered the exploration of DM therapy separate from its metabolites. Coadministration of DM with a low dose of quinidine inhibits DM metabolism, yields greater bioavailability and enables more specific testing of the therapeutic properties of DM apart from its metabolites. The development of the drug combination DM hydrobromide …

Convergence Of Excitatory And Inhibitory Projections In The Mouse Medial Geniculate Body, Blaise Andre Clarke

LSU Master's Theses

The medial geniculate body (MGB) is the target of excitatory and inhibitory inputs from several neural sources. Among these, the inferior colliculus (IC) is an important nucleus in the midbrain that acts as a nexus for many auditory pathways and projections, ascending and descending, throughout the rest of the central auditory system and provides both excitatory and inhibitory projections to the MGB. In addition, the thalamic reticular nucleus (TRN) is a major source of inhibition to the MGB, particularly in rodents. Finally, the auditory cortex (AC) is a major source of descending input to the MGB, providing direct excitation and …

Development Of Single-Well Gas Assisted Gravity Drainage Process For Enhanced Oil Recovery, Bikash Deep Saikia

LSU Doctoral Dissertations

EOR application in prolific deepwater Gulf of Mexico (DGOM) reservoirs has remained a challenge. Exorbitant well cost (>200M$) precludes having extensive injection patterns and very characteristics of the reservoirs themselves are partly to blame for negligible EOR activity in DGOM. We have been able to develop and demonstrate a novel design in the form of Single Well – Gas Assisted Gravity Drainage (SW-GAGD) process, which is potentially cost effective, at the same time ensuring very high oil recoveries. In this design, a single well acts as an injector as well as a producer, thereby minimizing well cost. The efficacy …

Re-Envisioning Macro Social Work Practice, Bowen Mcbeath

School of Social Work Faculty Publications and Presentations

This article presents 10 recommendations supporting a re-envisioning of macro practice for the 21^st century. These strategies are needed to counter a generational trend of disinvestment in macro social work practice and to support the historic vision of the social work profession as equally responsive to the needs of at-risk, disadvantaged populations and the organizational, community, and policy roots of social injustice. Before describing these recommendations and discussing their implications for the social work profession, I first briefly review the challenges facing macro practice and current initiatives promoting its renewal. The goal of this analysis is to define the …

Language Rich Early Childhood Classroom: Simple But Powerful Beginnings, Erin E. Flynn

School of Social Work Faculty Publications and Presentations

This article highlights research exploring the benefits of small group storytelling as a way to promote rich language in early childhood classrooms. Using the storytelling of children from a preschool classroom serving lower SES children, the collaborative affordances of story circles are explored. Results show that small group storytelling engages children in ways of using language associated with literacy learning. When storytelling, children use language in extended, multi-clause turns, relaying what happened in another context. Story requires children to communicate what happened as well as the interpersonal significance of events. Small group storytelling also gives children a chance to practice …

Adjustment To College In The United States: Perceptions Of Qatari Students, Janet S. Walker, Jennifer E. Blakeslee, Batoul Khalifa, Ramzi Nasser, Atmane Ikhlef

School of Social Work Faculty Publications and Presentations

This qualitative study is part of a collaborative research effort undertaken by investigators based in the United States and Qatar to better understand Qatari student perspectives on their post-secondary adjustment and success. Here, we report findings from structured interviews with Qatari nationals studying abroad in the US, all of whom were males who were, or had recently been, undergraduates at state universities and/or community colleges in Oregon (n=21). Approximately two-thirds were in business or economics programs and about a third in STEM programs (science, technology, engineering, or mathematics). Most of the interviews were conducted in Arabic and translated into English …

Autism, Tara Crapnell, Lynette Lau, Christopher D. Hanks, Christina Nicolaidis, Alice Kuo

School of Social Work Faculty Publications and Presentations

Autism spectrum disorder (ASD) is a complex, lifelong neurodevelopmental condition that is marked by deficits in social communication and interaction, and repetitive or restrictive patterns of behavior, interests, or activities. These symptoms can create challenges for individuals on the autism spectrum and their parents during the transition to adulthood, which may interfere with their ability to access and receive adequate and appropriate health care. Awareness of how the challenges associated with ASD may translate to healthcare barriers can help primary care providers address the complex needs of individuals who are on the autism spectrum and mitigate the risks of additional …

Beyond The Screen: Uneven Geographies, Digital Labour, And The City Of Cognitive-Cultural Capitalism, Dillon Mahmoudi, Anthony M. Levenda

Urban Studies and Planning Faculty Publications and Presentations

In this paper, we demonstrate that an examination of the socio-environmental impacts of digital ICTs remains a fruitless enterprise without “materializing” digital labour. We suggest one approach to materializing digital labour: this first includes connecting political economic analyses of digital ICTs to the co-evolution and geography of planetary urbanization and technological change, and second, examining the relationships between immaterial, digital, labour with the material industrial production system. In the context of broad changes in technology, social life, and urbanization, many scholars have theorized a shift towards a third phase of capitalism, beyond mercantilism and industrialism, based in immaterial, digital, and …

Creating An Inclusionary Bicycle Justice Movement, Aaron Golub, Melody L. Hoffman, Gerardo Francisco Sandoval, Adonia Lugo

Urban Studies and Planning Faculty Publications and Presentations

This is a chapter in: Bicycle Justice and Urban Transformation: Biking for All?

Expressive Cartography, Boundary Objects, And The Aesthetics Of Public Visualization, Patricio Davila, Dave Colangelo, Robert Tu

School of Film Faculty Publications and Presentations

Aesthetic visualization projects that incorporate users, community stakeholders, multiple modalities and technologies necessarily emphasize the way that an artistic visualization can be both an artifact and a process — a conceptualization of aesthetic visualization that is useful for thinking about visualization in general. In this paper, the authors propose the concept of the visualization as boundary object, a move away from the indexical claims of visualization and instead towards an acknowledgement of the entangled nature of social, political, economic, cultural, technological and environmental actants. Through a description of the In The Air, Tonight public visualization project, the authors suggest that …

Pdxscholar Annual Report 2015, Karen Bjork, Sherry Buchanan, David Coate, Bertrand Robinson, Stacey Schlatter

Library Faculty and Staff Publications and Presentations

This report details the fifth year of operation for PDXScholar, Portland State University's institutional repository. The report covers the period between January 1, 2015 and December 31, 2015.

From Grapheme To Phonological Output: Performance Of Adults Who Stutter On A Word Jumble Task, Megann Mcgill, Harvey Sussman, Courtney T. Byrd

Speech and Hearing Sciences Faculty Publications and Presentations

Purpose

The purpose of the present study was to extend previous research by analyzing the ability of adults who stutter to use phonological working memory in conjunction with lexical access to perform a word jumble task.

Method

Forty English words consisting of 3-, 4-, 5-, and 6-letters (n = 10 per letter length category) were randomly jumbled using a web-based application. During the experimental task, 26 participants were asked to silently manipulate the scrambled letters to form a real word. Each vocal response was coded for accuracy and speech reaction time (SRT).

Results

Adults who stutter attempted to solve …