Digital Commons Network^™

Drainage Reversals Due To Tectonic Uplift: An Investigation Through Modeling, Max Gregory Bordal

University Honors Theses

In mountainous landscapes throughout the world bedrock dominated river channels record a history of the tectonic and climatic evolution of the drainage basins that contain them. In traditional analysis of river profiles, uplift and erosion are considered to be in balance in a steady state. In this study the transient state of a drainage basin is explored and numerically modeled, where a Gaussian shaped pulse of tectonic uplift overwhelms the river's incision and forces a diversion of the drainage network. I review the derivation of and use the detachment limited stream power equation to execute a model to find the …

Classification Of Four Meteorite Samples, Karla Farley

University Honors Theses

The petrography, mineralogy, and mineral chemistry of four unclassified Northwest Africa meteorites in the Cascadia Meteorite Laboratory collection (CML0005, 0023, 0024, 0032) were studied using optical microscopy and scanning electron microscopy. The data will be used to classify the meteorites and to obtain official names for the meteorites. CML0023 has the preliminary classification of L6 (S3) W1, CML0024 has L6 (S3) W1, and CML0032 has L6 (S2) W1. CML0005 has chemistry and mineralogy that indicate it is an anomalous acapulcoite.

A Method For Reducing Ill-Conditioning Of Polynomial Root Finding Using A Change Of Basis, Edison Tsai

University Honors Theses

The problem of solving polynomial equations is one of the oldest problems in mathematics. Many ancient civilizations developed systems of algebra which included methods for solving linear equations. Around 2000 B.C.E. the Babylonians found a method for solving quadratic equations which is equivalent to the modern quadratic formula. Several Italian Renaissance mathematicians found general methods for finding roots of cubic and quartic polynomials. But it is known that there is no general formula for finding the roots of any polynomial of degree 5 or higher using only arithmetic operations and root extraction. Therefore, when presented with the problem of solving …

Mindfulness And Test Performance After Stereotype Activation: A Randomized Experiment, Charles J.Z. Daniel

University Honors Theses

Although stereotype threat – pressure to avoid confirming or being judged based on a stereotype – has been found to affect performance on an array of tasks, few studies have examined ways to alleviate the threat after it has been activated. Previous research has demonstrated several outcomes of mindfulness exercises - increased emotional regulation, increased attentional regulation, change in perspective of self, and greater resources available to devote to learning – which parallel four potential mechanisms for stereotype threat: anxiety and SNS arousal, decreased working memory capacity, mindset, and effort. The present study tested the impact of two interventions - …

Does U.S. Macroeconomic News Make Emerging Financial Markets Riskier?, Esin Cakan, Nadia Doytch, Kamal P. Upadhyaya

Publications and Research

This study analyzes the impacts of US macroeconomic announcement surprises on the volatility of twelve emerging stock markets by employing asymmetric GJR-GARCH model. The model includes both positive and negative surprises about inflation and unemployment rate announcements in the U.S. We find that volatility shocks are persistent and asymmetric. Asymmetric volatility increases with bad news on US inflation in five out of the twelve countries studied and it increases with a bad news on U.S. unemployment in four out of twelve countries. Asymmetric volatility decreases with good news about US employment situation in eight countries out of twelve countries. Such …

Variance Predicts Salience In Central Sensory Processing, Ann M. Hermundstad, John J. Briguglio, Mary M. Conte, Jonathan D. Victor, Vijay Balasubramanian, Gašper Tkačik

Publications and Research

Information processing in the sensory periphery is shaped by natural stimulus statistics. In the periphery, a transmission bottleneck constrains performance; thus efficient coding implies that natural signal components with a predictably wider range should be compressed. In a different regime—when sampling limitations constrain performance—efficient coding implies that more resources should be allocated to informative features that are more variable. We propose that this regime is relevant for sensory cortex when it extracts complex features from limited numbers of sensory samples. To test this prediction, we use central visual processing as a model: we show that visual sensitivity for local multi-point …

Proceedings Of The 1st Annual Cuny Games Festival, Robert O. Duncan, Joe Bisz, Francesco Crocco, Carlos Hernandez, Kathleen Offenholley, Leah Potter, Maura A. Smale, Cuny Games Network

Publications and Research

Proceedings of the CUNY Games Conference, held from January 17-18, 2014, at the CUNY Graduate Center and Borough of Manhattan Community College.

Topics in Game Design - Teaching with Virtual and Augmented Realities - Writing with Games - Breaking the Magic Circle: Games & Real Life - Interactive Game Design (What's Your Game Plan? - Designing Ethical Games - Games and Gender - Gaming English Language and Literature - Game, Narrative, Literacy - Teaching with Games - Games, Storytelling, and Narrative - Games and STEM - Learning by Design - Students as Game Designers - Experiencing Reality in Popular Games …

Regional Differences In Beverage And Fruit Consumption In China, Xiaotian Wu

Agribusiness and Applied Economics

The purpose of this thesis was to examine the impact of regional and other demographic characteristics, such as age, education level, and household income, on food consumption in China. In total, data for 2342 households from 11 different Chinese cities were analyzed. Two separate studies on fruits and beverages were conducted, each with four `home food' groups and four `away from home food' groups. A two-step quadratic ideal demand system model was used to analyze the regional differences and the effects of the other demographic characteristics on food consumption in China. Regional differences in beverage and fruit consumption were identified …

Geodesy- And Geology-Based Slip-Rate Models For The Western United States (Excluding California) National Seismic Hazard Maps, Mark D. Petersen, Yuehua Zeng, Kathleen M. Haller, Robert Mccaffrey, William C. Hammond, Peter Bird, Morgan Moschetti, Zheng-Kang Shen, Jayne Bormann, Wayne R. Thatcher

Geology Faculty Publications and Presentations

The 2014 National Seismic Hazard Maps for the conterminous United States incorporate additional uncertainty in fault slip-rate parameter that controls the earthquake-activity rates than was applied in previous versions of the hazard maps. This additional uncertainty is accounted for by new geodesy- and geology-based slip-rate models for the Western United States. Models that were considered include an updated geologic model based on expert opinion and four combined inversion models informed by both geologic and geodetic input. The two block models considered indicate significantly higher slip rates than the expert opinion and the two fault-based combined inversion models. For the hazard …

Central Cascadia Subduction Zone Creep, Gina M. Schmalzle, Robert Mccaffrey, Kenneth C. Creager

Geology Faculty Publications and Presentations

Central Cascadia between 43ºN and 46ºN has reduced interseismic uplift observed in geodetic data and coseismic subsidence seen in multiple thrust earthquakes, suggesting elevated persistent fault creep in this section of the subduction zone. We estimate subduction thrust "decade-scale" locking and crustal block rotations from three-component continuous Global Positioning System (GPS) time series from 1997 to 2013, as well as 80 year tide gauge and leveling-derived uplift rates. Geodetic observations indicatecoastal central Oregon is rising at a slower rate than coastal Washington, southern Oregon and northern California. Modeled locking distributions suggest a wide locking transition zone that extends inland undercentral …

The Impact Of The Panama Canal Expansion On U.S. Soybean Exports, Brian Paul Gallagher

Agribusiness and Applied Economics

The objective of this study was to evaluate the impact of the Panama Canal Expansion on the flow of soybeans from producing regions in the U.S. to its ports for export. Specific objectives of this study were to determine the toll rate at which the Panama Canal Authority will maximize their toll revenues for soybeans transiting the canal, and to analyze the impact of the canal expansion on soybean shipments from U.S. producing regions to ports for export. To conduct this study a spatial optimization model was developed. The model minimizes all transportation costs associated with the transportation of soybeans. …

Survival Analysis Of Foreclosures By Housing And Neighborhood Characteristics, Resha Shehari Aviena Dias

Agribusiness and Applied Economics

Losing a home affects not only the homeowner but the community at large. This thesis examines both housing and neighborhood characteristics to determine which characteristics have an impact on the speed of the sale of a foreclosed property. The findings from the Cox Proportional hazard model show which characteristics buyers value more when buying a foreclosed property. These characteristics can be different from the ones that are used to determine the sales price of a foreclosed property. Both financial institutions and real estate speculators can benefit from knowing which housing characteristics are preferred in a foreclosed property, allowing them to …

A Historical Analysis Of Natural Gas Demand, Nathan Richard Dalbec

Agribusiness and Applied Economics

This thesis analyzes demand in the US energy market for natural gas, oil, and coal over the period of 1918-2013 and examines their price relationship over the period of 2007-2013. Diagnostic tests for time series were used; Augmented Dickey-Fuller, Kwiatkowski–Phillips–Schmidt–Shin, Johansen cointegration, Granger Causality and weak exogeneity tests. Directed acyclic graphs were used as a complimentary test for endogeneity. Due to the varied results in determining endogeneity, a seemingly unrelated regression model was used which assumes all right hand side variables in the three demand equations were exogenous. A number of factors were significant in determining demand for natural gas …

3d Printing Of Crystallographic Models And Open Access Databases, Werner Kaminsky, Trevor J. Snyder, Peter Moeck

Physics Faculty Publications and Presentations

Provides a brief overview of opportunities for crystallography allowed by the recent developments in 3D printing technology. in combination with open access databases.

3d Printing & Open Access Databases For Crystallographic College Education, Peter Moeck, Jennifer Stone-Sundberg, Trevor J. Snyder, Werner Kaminsky, Saulius Grazulis, International Advisory Board Of The Crystallography Open Database

Physics Faculty Publications and Presentations

Presentation gives an overview of available open access databases of crystals and crystal structures, as well as discussions of how newly developed 3D printing technologies can be used to teach crystallography at the college level. Offers advice regarding conversion of crystallographic information files to 3D printing files, and shares news from the 3D printing of crystallographic models community.

3d Printing Of Crystallographic Models For Interdisciplinary College Education, Peter Moeck, Werner Kaminsky, Trevor J. Snyder

Physics Faculty Publications and Presentations

Provides a brief overview of the Crystallography Open Database, and how advances in 3D printing have created opportunities in teaching of college level crystallography courses.

Advances In Crystallographic Image Processing For Scanning Probe Microscopy, Peter Moeck, Taylor T. Bilyeu, A. Mainzer Koenig, Jack C. Straton

Physics Faculty Publications and Presentations

Brief overview of advances in image processing for scanning probe microscopes, as related to high resolution images of crystals and arrays of membrane proteins.

Kinesthetic Activities For The Classroom, Elliot E. Mylott, Justin C. Dunlap, Lester Lampert, Ralf Widenhorn

Physics Faculty Publications and Presentations

Educators have found that kinesthetic involvement in an experiment or demonstration can engage students in a powerful way. With that as our goal, we developed three activities that allow students to connect with and quantitatively explore key physics principles from mechanics with three fun physical challenges. By presenting these activities as competitions, we can challenge students to use what they know about the relevant physics to improve their performance and beat their own score or those of other students. Each activity uses an original, real-time data collecting program that offers students and educators a simple, clear method to demonstrate various …

Patent Trolling Why Bio & Pharmaceuticals Are At Risk, Robin Feldman, Nicholson W. Price Ii

Faculty Scholarship

No abstract provided.

Legal Wilderness Its Past And Some Speculations On Its Future, John D. Leshy

Faculty Scholarship

No abstract provided.

The Perils Of Ignoring (Or Misunderstanding) Politics And Organizing, David Johns

Political Science Faculty Publications and Presentations

Conservation scientists and advocates were surprised by the U.S. Congress stripping away protection for wolves in the US northern Rocky Mountains. If they had paid attention to earlier political lessons in which court victories had been undermined by determined political organizing they would not have been surprised and could have adopted strategies that would have given them much more leverage with elected officials. Instead conservationists were out-organized and elected officials normally supportive of the U.S. Endangered Species Act responded to anti-wolf groups because they brought more pressure to bear than conservationists. Although political lessons are specific to the system in …

Auroral Ionospheric F Region Density Cavity Formation And Evolution: Mica Campaign Results, M. Zettergren, Kristina A. Lynch, D. Hampton, M. Nicolls, B. Wright, M. Conde, J. Moen, M. Lessard, R. Miceli, S. Powell

Dartmouth Scholarship

Auroral ionospheric F region density depletions observed by PFISR (Poker Flat Incoherent Scatter Radar) during the MICA (Magnetosphere-Ionosphere Coupling in the Alfvén Resonator) sounding rocket campaign are critically examined alongside complementary numerical simulations. Particular processes of interest include cavity formation due to intense frictional heating and Pedersen drifts, evolution in the presence of structured precipitation, and refilling due to impact ionization and downflows. Our analysis uses an ionospheric fluid model which solves conservation of mass, momentum, and energy equations for all major ionospheric species. These fluid equations are coupled to an electrostatic current continuity equation to self-consistently describe auroral electric …

Rational Linear Spaces On Hypersurfaces Over Quasi-Algebraically Closed Fields, Todd Cochrane, Craig V. Spencer, Hee-Sung Yang

Dartmouth Scholarship

Let k = F-q(t) be the rational function fi eld over F-q and f(x) is an element of k[x(1),..., x(s)] be a form of degree d. For l is an element of N, we establish that whenever s > l + Sigma(d)(w=1)w(2)(d - w + l - 1 l - 1), the projective hypersurface f(x) = 0 contains a k-rational linear space of projective dimension l. We also show that if s > 1 + d(d + 1)(2d + 1)/6, then for any k-rational zero a of f(x) there are in fi nitely many s-tuples (pi(1),...,pi(s) ) of monic irreducible polynomials over …

Benthic And Pelagic Pathways Of Methylmercury Bioaccumulation In Estuarine Food Webs Of The Northeast United States, Celia Y. Chen, Mark E. Borsuk, Deenie M. Bugge, Terill Hollweg

Dartmouth Scholarship

Methylmercury (MeHg) is a contaminant of global concern that bioaccumulates and bioamagnifies in marine food webs. Lower trophic level fauna are important conduits of MeHg from sediment and water to estuarine and coastal fish harvested for human consumption. However, the sources and pathways of MeHg to these coastal fisheries are poorly known particularly the potential for transfer of MeHg from the sediment to biotic compartments. Across a broad gradient of human land impacts, we analyzed MeHg concentrations in food webs at ten estuarine sites in the Northeast US (from the Hackensack Meadowlands, NJ to the Gulf of Maine). MeHg concentrations …

Dependence Of Ice-Core Relative Trace-Element Concentration On Acidification, Bess G. Koffman, Michael J. Handley, Erich C. Osterberg, Mark L. Wells, Karl J. Kreutz

Dartmouth Scholarship

To assess the role of methodological differences on measured trace-element concentrations in ice cores, we developed an experiment to test the effects of acidification strength and time on dust dissolution using snow samples collected in West Antarctica and Alaska. We leached Antarctic samples for 3 months at room temperature using nitric acid at concentrations of 0.1, 1.0 and 10.0% (v/v). At selected intervals (20 min, 24 hours, 5 days, 14 days, 28 days, 56 days, 91 days) we analyzed 23 trace elements using inductively coupled plasma mass spectrometry. Concentrations of lithogenic elements scaled with acid strength and increased by 100–1380% …

A Direct Solver With O(N) Complexity For Variable Coefficient Elliptic Pdes Discretized Via A High-Order Composite Spectral Collocation Method, A. Gillman, P. G. Martinsson

Dartmouth Scholarship

A numerical method for solving elliptic PDEs with variable coefficients on two-dimensional domains is presented. The method is based on high-order composite spectral approximations and is designed for problems with smooth solutions. The resulting system of linear equations is solved using a direct (as opposed to iterative) solver that has optimal $O(N)$ complexity for all stages of the computation when applied to problems with nonoscillatory solutions such as the Laplace and the Stokes equations. Numerical examples demonstrate that the scheme is capable of computing solutions with a relative accuracy of $10^{-10}$ or better for challenging problems such as highly oscillatory …

T1 Magnetic Resonance Imaging Head Segmentation For Diffuse Optical Tomography And Electroencephalography, Katherine L. Perdue, Solomon G. Diamond

Dartmouth Scholarship

No abstract provided.

Wendy Ewald Edited By Nolan Calisch, Wendy Ewald, Nolan Calisch

Reference Points

"Wendy Ewald, edited by Nolan Calisch, offers a survey of the past and present work of photographer and conceptual artist Wendy Ewald, including insight into her collaborative process and inspiration, and a collection of thoughtful reflections from a collaborator, a colleague, and a contemporary artist who have been touched by her work.

This book is part of the Reference Points series published through Portland State University Art and Social Practice MFA Program. The series is an evolving pedagogical framework in which graduate students formulate and research a significant topic or practitioner(s) related to socially engaged art. Because …

Framing Transportation Planning Pedagogy For Sustainability Generalists, Beth Sweeney, Ann Scheerer, Vicki Elmer

TREC Final Reports

This paper describes a pilot graduate sustainable transportation course developed at the University of Oregon to provide hands-on project experience for students studying sustainability. New approaches to sustainability and transportation pedagogies will provide a galvanizing force for tomorrow’s graduates, who must respond to concerns about climate change and the environment, social equity, and an uncertain economy. They will require an aptitude for both technical skills and collaborative leadership and communication skills. The course was guided by a framework founded in five themes from the literature on sustainability education and transportation planning and engineering education: leading with sustainability’s cornerstones of people, …

Dynamic Simulation Of The Effect Of Tamper Resistance On Opioid Misuse Outcomes, Alexandra E. Nielsen, Wayne Wakeland

Complex Systems Faculty Publications and Presentations

The objective of the study was to develop a system dynamics model of the medical use of pharmaceutical opioids, and the associated diversion and nonmedical use of these drugs. The model was used to test the impact of the a tamper resistance intervention in this complex system. The study relied on secondary data obtained from the literature and from other public sources for the period 1995 to 2008. In addition, an expert panel provided recommendations regarding model parameters and model structure. The behavior of the resulting systems-level model compared favorably with reference behavior data. After the base model was tested, …