Digital Commons Network^™

Interview With Brandon Hill, Bamboo Sushi, 2010 (Audio), Brandon Hill

All Sustainability History Project Oral Histories

Interview of Brandon Hill by Jeff Francoeur at Bamboo Sushi, SE Portland, Oregon on August 10, 2010.

The interview index is available for download.

Interview With Farhad Ghafarzade, Green Drop Garage, 2010 (Audio), Farhad Ghafarzade

All Sustainability History Project Oral Histories

Interview of Farhad Ghafarzade by Jeff Howard in SE Portland, Oregon on August 6th, 2010.

The interview index is available for download.

Interview With Nicole Stein, Umpqua Bank, 2010 (Audio), Nicole Stein

All Sustainability History Project Oral Histories

Interview of Nicole Stein by Shivon Van Allen at SW Portland, Oregon on August 5th, 2010.

The interview index is available for download.

Interview With Garrett Moon, The Commons Project, 2010 (Audio), Garrett Moon

All Sustainability History Project Oral Histories

Interview of Garrett Moon by Rayne Walter-Young at Portland State University on August 3rd, 2010.

The interview index is available for download.

Experimental Observations Of Active Invariance Striations In A Tank Environment, Jorge E. Quijano, Richard L. Campbell, Tobias G. Oesterlein, Lisa M. Zurk

Electrical and Computer Engineering Faculty Publications and Presentations

The waveguide invariant in shallow water environments has been widely studied in the context of passive sonar. The invariant provides a relationship between the frequency content of a moving broadband source and the distance to the receiver, and this relationship is not strongly affected by small perturbations in environment parameters such as sound speed or bottom features. Recent experiments in shallow water suggest that a similar range-frequency structure manifested as striations in the spectrogram exists for active sonar, and this property has the potential to enhance the performance of target tracking algorithms. Nevertheless, field experiments with active sonar have not …

Supplementary Balance Laws And The Entropy Principle, Serge Preston

Mathematics and Statistics Faculty Publications and Presentations

In this work we study the mathematical aspects of the development in the continuum thermodynamics known as the “Entropy Principle”. It started with the pioneering works of B.Coleman, W.Noll and I. Muller in 60th of XX cent. and got its further development mostly in the works of G. Boillat, I-Shis Liu and T.Ruggeri. “Entropy Principle” combines in itself the structural requirement on the form of balance laws of the thermodynamical system (denote such system (C)) and on the entropy balance law with the convexity condition of the entropy density. First of these requirements has pure mathematical form defining so called …

Climate Change And Globalization In The Americas: Case Studies Of Mitigation And Adaptation, Mary Finley-Brook, Melissa Haeffner, Charmaine Heslop-Thomas, Elma Montaña, Leah Sprain

Environmental Science and Management Faculty Publications and Presentations

Robin Leichenko and Karen O‘Brien have proposed ―double exposure‖ as a conceptual framework to demonstrate how processes of globalization and global environmental change (GEC) redefine risk and encourage new, interrelated responses to social and ecological transitions (O‘Brien and Leichenko, 2000; Leichenko and O'Brien, 2008). In particular, the concept encourages researchers and policy makers to consider interplay between global climate change and globalization and how this is expressed unevenly across space. After reviewing the ways double exposure has been used in the literature, we consider four case studies to investigate the utility of the framework for analyzing and understanding climate change …

Contribution Of Membrane Elastic Energy To Rhodopsin Function, Olivier Soubias, Walter E. Teague, Kirk G. Hines, Drake C. Mitchell, Klaus Gawrisch

Physics Faculty Publications and Presentations

We considered the issue of whether shifts in the metarhodopsin I (MI)-metarhodopsin II (MII) equilibrium from lipid composition are fully explicable by differences in bilayer curvature elastic stress. A series of six lipids with known spontaneous radii of monolayer curvature and bending elastic moduli were added at increasing concentrations to the matrix lipid 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) and the MI-MII equilibrium measured by flash photolysis followed by recording UV-vis spectra. The average area-per-lipid molecule and the membrane hydrophobic thickness were derived from measurements of the 2H NMR order parameter profile of the palmitic acid chain in POPC. For the series of ethanolamines …

Biosynthesis Of Salinosporamides From Α,Β-Unsaturated Fatty Acids: Implications For Extending Polyketide Synthase Diversity, Yuan Liu, Christopher Hazzard, Alessandra S. Eustáquio, Kevin A. Reynolds, Bradley S. Moore

Chemistry Faculty Publications and Presentations

A new series of coenzyme A-tethered polyketide synthase extender units were discovered in relation to the biosynthesis of the salinosporamide family of anticancer agents from the marine bacterium Salinispora tropica. In vivo and in vitro experiments revealed that the crotonyl-CoA reductase/carboxylase SalG has broad substrate tolerance toward 2-alkenyl-CoAs that give rise to the salinosporamide C-2 substitution pattern.

Improving Robustness Of Hydrologic Parameter Estimation By The Use Of Moving Block Bootstrap Resampling, Hamid Moradkhani, Mohammad Ebtehaj, Hoshin V. Gupta

Civil and Environmental Engineering Faculty Publications and Presentations

Modeling of natural systems typically involves conceptualization and parameterization to simplify the representations of the underlying process. Objective methods for estimation of the model parameters then require optimization of a cost function, representing a measure of distance between the observations and the corresponding model predictions, typically by calibration in a static batch mode and/or via some dynamic recursive optimization approach. Recently, there has been a focus on the development of parameter estimation methods that appropriately account for different sources of uncertainty. In this context, we introduce an approach to sample the optimal parameter space that uses nonparametric block bootstrapping coupled …

Non-­Native Invasive Aquatic Plant And Mussel Survey Of Six Umpqua National Forest Area Lakes, Mark Sytsma, Rich Miller, Rupa Shrestha

Center for Lakes and Reservoirs Publications and Presentations

Six lakes and ponds located within or near the Umpqua National Forest were surveyed for non-­native aquatic plants and mussels during August, 2009. A diverse assemblage of native plants was identified along with one possible non-­native aquatic plant hybrid in Herberts Pond. The possible hybrid between the non-­native species Myriophyllum spicatum and the native species M. sibiricum requires genetic analysis for identification. Water chemistry is suitable for the establishment of invasive mussels in Buckeye Lake; however, no zebra or quagga mussel veligers were detected in any of the lakes.

Climate Change, Its Effect On Migration Patterns Of The Cackling Goose And White-Fronted Goose In The Willamette Valley, And Implications For Goose Management, Kelly Warren

Environmental Science and Management Professional Master's Project Reports

This thesis considers the question of whether climate change is affecting the migration patterns of geese in the Pacific Flyway, specifically cackling geese (Branta hutchinsii minima) and Pacific white-fronted geese (Anser albifrons frontalis). Ancillary questions that are considered are as follows:

• If global warming is affecting these species, what is the nature of the effects?

• How are the changes affecting the human environment and what can be done about these effects?

In 1994, the majority of the cackler population in the Pacific Flyway began to winter in Oregon's Willamette Valley rather than in their …

Comparing Discrete Simulation And System Dynamics: Modeling An Anti-Insurgency Influence Operation, Wayne Wakeland, Una E. Medina

Complex Systems Faculty Publications and Presentations

This paper contrasts the tradeoffs of modeling the same dynamic problem at a micro scale and at a macro scale of analysis: discrete system simulation (DS) versus continuous system simulation or system dynamics (SD). Both are employed to model the influence of entertainment education on terrorist system decay, with implications for field application. Each method optimizes different design, scope/scale, data availability/accuracy, parameter settings, and system sensitivities. Whether the research served by the computer model is applied or theoretical, DS tends to be useful for understand low-level individual unit/step influences on system change over time, whereas SD tends to shine when …

System Dynamics Implementation Of An Extended Brander And Taylor-Like Easter Island Model, Takuro Uehara, Yoko Nagase, Wayne Wakeland

Complex Systems Faculty Publications and Presentations

We provide a system dynamics implementation of a dynamic ecological economics model. Dynamic economic models are often constrained to use functions, such as the Cobb-Douglas function, chosen “conveniently” to allow for analytic solutions. The C-D function, however, suffers from its fixed elasticity that does not allow for the substitutability between man-made capital and natural capital to change, which is vital for economic sustainability. Using system dynamics removes this constraint and enables more realistic ecological economics models containing functions not amenable to analytic solution. The base model is the natural resource and population growth model developed by Brander and Taylor (1998) …

Symmetries Of The Central Vestibular System: Forming Movements For Gravity And A Three-Dimensional World, Gin Mccollum, Douglas Hanes

Mathematics and Statistics Faculty Publications and Presentations

Intrinsic dynamics of the central vestibular system (CVS) appear to be at least partly determined by the symmetries of its connections. The CVS contributes to whole-body functions such as upright balance and maintenance of gaze direction. These functions coordinate disparate senses (visual, inertial, somatosensory, auditory) and body movements (leg, trunk, head/neck, eye). They are also unified by geometric conditions. Symmetry groups have been found to structure experimentally-recorded pathways of the central vestibular system. When related to geometric conditions in three-dimensional physical space, these symmetry groups make sense as a logical foundation for sensorimotor coordination.

Theories And Models Of The Evolution Of Altruism Unification Vs. Unique Explanations, Jeffrey Alan Fletcher

Complex Systems Faculty Publications and Presentations

Recently the debate over how altruistic traits evolve has intensified. Part of this debate centers on whether alternative theories (e.g. inclusive fitness, multilevel selection, and reciprocal altruism) represent different perspectives on the same underlying phenomena, and can therefore be unified, or whether each different theory represents a unique empirical mechanism. Towards unification, I present a simple and general framework that highlights an underlying necessary condition for the evolution of altruism: assortment of carriers of the altruistic trait with the helping behaviors of others. I also critically examine the claim that inclusive fitness theory uniquely explains the evolution of altruism. While …

2010 Commencement Program, Marian Wright Edelman

Commencement Archives 2010-19

The program for the 2010 PSU Commencement ceremony on June 13, 2010.

Marian Wright Edelman, founder and president of the Children's Defense Fund, delivered the commencement address and was awarded an honorary doctorate by PSU President Wim Wiewel.

Investigation Of The Sources And Sinks Of Atmospheric Methane, Christopher Lee Butenhoff

Dissertations and Theses

The work presented here represents a number of independent studies that investigated various components of the CH₄ budget, namely the sources and sinks. We used a chemical-tracer model and created unique long-term time series of atmospheric CH₄, carbon monoxide (CO), molecular hydrogen (H₂), and methylchloroform (CH₃CCl₃) measurements at marine background air to derive histories of atmospheric hydroxyl radical (OH) - the main chemical oxidant of CH₄, biomass burning - an important source of CH₄ in the tropics, and emissions of CH₄ from rice paddies - one of …

Interview With Brad Bateman, Costco, 2010 (Audio), Brad Bateman

All Sustainability History Project Oral Histories

Interview of Brad Bateman by Nemah Dalai at Costco Clackamas, Oregon on June 10th, 2010.

The interview index is available for download.

Photoemission From Localized Surface Plasmons In Fractal Metal Nanostructures, Robert Campbell Word, Rolf Könenkamp, T. T. Dornan

Physics Faculty Publications and Presentations

We use photoemission microscopy to characterize localized surface plasmon distributions in nanostructured gold layers on indium-tin-oxide/glass substrates. The Au films have a fractal dimension of ∼1.3 and smallest feature sizes of ∼100 nm. We use femtosecond laser pulses at a wavelength of ∼800 nm for the plasmon excitation. Photoelectron emission occurs by a three-photon process in localized areas of indium-tin-oxide with ∼70 nm diameter. In these areas the photoemission rate is enhanced several thousand fold compared to nonstructured surface areas. The results show that plasmon enhanced photoemission can be induced in a nonabsorbing material in proximity to a plasmon-active metal …

Interview With Marisa Ferro, Portland State University, 2010 (Audio), Marisa Ferro

All Sustainability History Project Oral Histories

Interview of Marisa Ferro by Hamza Sherwani at Portland State University on June 1st, 2010.

The interview index is available for download.

The Surface Expression Of Semidiurnal Internal Tides Near A Strong Source At Hawaii. Part I: Observations And Numerical Predictions, Cedric Chavanne, P. Flament, Glenn S. Carter, M. Merrifield, D. Luther, Edward D. Zaron, K. W. Gurgel

Civil and Environmental Engineering Faculty Publications and Presentations

Observations of semidiurnal currents fromhigh-frequency radioDoppler currentmeters andmoored acoustic Doppler current profilers (ADCPs) in the Kauai Channel, Hawaii, are described and compared with two primitive equation numerical models of the tides. The Kauai Channel, separating the islands of Oahu and Kauai, is a site of strong internal tide generation by the barotropic tides flowing over Kaena Ridge, the subsurface extension of Oahu. The nature and impacts of internal tide generation in the Kauai Channel were intensively studied during the 2002–03 near-field component of the Hawaii Ocean Mixing Experiment. Comparisons of observed coherent (i.e., phase locked to the astronomical forcing)M_{2 …}

Outcomes Of A One-Week Teaching Training In Community-Based Ecological Research, Kara Gonsler

Environmental Science and Management Professional Master's Project Reports

The goal of this project was to expand on potential audiences and partnerships within the Teaching Ecological Complexity Project, by creating a one-week teacher training workshop in collaboration with a local natural resource management partner. The training sought to increase teachers’ understanding of ecology and qualitative conceptual models through immersion in field research and partnerships with local scientists and natural resource managers. Ecological knowledge was measured by comparing pre and post qualitative conceptual models, which were scored with a rubric and analyzed using the Wilcoxon Signed Ranks Test. Classroom implementation of an inquiry-based ecological research project was expected of participants. …

Disproportionality And Learning Disabilities: Parsing Apart Race, Socioeconomic Status, And Language, Dara Shifrer, Chandra Muller, Rebecca Callahan

Sociology Faculty Publications and Presentations

The disproportionate identification of learning disabilities among certain sociodemographic subgroups, typically groups that are already disadvantaged, is perceived as a persistent problem within the education system. The academic and social experiences of students who are misidentified with a learning disability may be severely restricted, whereas students with a learning disability who are never identified are less likely to receive the accommodations and modifications necessary to learn at their maximum potential. The authors use the Education Longitudinal Study of 2002 to describe national patterns in learning disability identification. Results indicate that sociodemographic characteristics are predictive of identification with a learning disability. …

Are Biotechnology And Sustainable Agriculture Compatible?, David E. Ervin, Leland L. Glenna, Raymond Adelard Jussaume

Economics Faculty Publications and Presentations

Agricultural biotechnology has been largely opposed by advocates in the sustainable agriculture movement, despite claims by the technology’s proponents that it holds the promise to deliver both production (economic) and environmental benefits, two legs of the sustainability stool. We argue in this paper that participants in this polarized debate are talking past each other because assumptions about biotechnology and sustainability remain simplistic and poorly defined. Genetically engineered (GE) herbicide-resistant and insect-resistant crop varieties are the most visible current forms of agricultural biotechnology, and thus the form of biotechnology that many in the sustainability movement react to. However, these crops represent …

Innovation, Markets, And Evolution, Mitch Green

Economics Undergraduate Honors Theses

This paper approaches innovation from an evolutionary perspective. Literature spanning a broad range of traditions in economics is considered, to include Institutionalist, Schumpeterian, post-Keynesian, and growth theorists. Key systemic changes are examined in the context of prevailing technological and social institutions. It is argued that expectation-fixing effects such as path-dependence in investment and innovation provide structure to a social network of market institutions that seek to validate money contracts. The institution of money is considered as a center of power in the system and affects the course of innovation. Money as the unit of account becomes the object of …

Thirlwall's Law And Krugman's 45-Degree Rule: Mathematically Identical, Mutually Exclusive, Karl Garbacik

Economics Undergraduate Honors Theses

Thirlwall's Law and the 45-degree rule, originally formulated by Krugman, are radically different interpretations of the same statistical regularity. This statistical regularity is that a country's long-run growth rate will approximate to the ratio of that country's export growth to its import elasticity of demand. Thirlwall's Law falls under a Post-Keynesian framework which is primarily a demand-side model. The 45-degree rule relies on a supply-side interpretation, a result of its neoclassical origins. This thesis seeks to answer two questions. The first is, are the members of the Post-Keynesian and neoclassical communities working on each of these theories aware of the …

Food Delivery Footprint: Addressing Transportation, Packaging, And Waste In The Food Supply Chain, Madeleine E. Pullman, Robin Fenske, Wayne Wakeland

Business Faculty Publications and Presentations

Transportation of food accounts for a significant fraction of the carbon dioxide emissions believed to be adversely impacting climate and the environment. And this impact is increasing as food supply chains become longer and more complex, and food packaging requirements lead to increased waste. Many organizations such as hospitals and upper level education are becoming increasingly concerned about sustainability. In this study, college, university, and hospital food purchasing behavior were assessed using interviews, surveys, and modeling to evaluate the environmental implications of decisions regarding food transportation and packaging. Current purchasing practices, corresponding transportation modes, packaging, recycling, and waste removal were …

Interview With Steve Jones, Us Forest Service, 2010 (Audio), Steve Jones

All Sustainability History Project Oral Histories

Interview of Steve Jones by Scott Swenson at Hood River, Oregon on May 25th, 2010.

The interview index is available for download.

Interview With Stephanie Noll, Bicycle Transportation Alliance, 2010 (Audio), Stephanie Noll

All Sustainability History Project Oral Histories

Interview of Stephanie Noll by Sean Cochran in NW Portland, Oregon on May 24th, 2010.

The interview index is available for download.