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Lake Whatcom Model Calibration With Variable Stoichiometry In Sediments - Revised, Chris Berger, Scott A. Wells Feb 2007

Lake Whatcom Model Calibration With Variable Stoichiometry In Sediments - Revised, Chris Berger, Scott A. Wells

Civil and Environmental Engineering Faculty Publications and Presentations

This memorandum discusses model calibration and enhancements made to the Lake Whatcom water quality model. Model development and initial calibration were documented in the report “Lake Whatcom Water Quality Model” (Berger and Wells, 2005). The Lake Whatcom water quality model has been converted from CE-QUAL-W2 version 3.2 to version 3.5 (Cole and Wells, 2006).

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Faculty Senate Monthly Packet January 2007, Portland State University Faculty Senate Jan 2007

Faculty Senate Monthly Packet January 2007, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The January 2007 Monthly packet includes the January agenda and appendices and the Faculty Senate minutes and attachments from the meeting held December 2006

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Advancing Transdisciplinary And Translational Research Practice: Issues And Models Of Doctoral Education In Public Health, Linda Neuhauser, Dawn M. Richardson, Sonja Mackenzie, Meredith Minkler Jan 2007

Advancing Transdisciplinary And Translational Research Practice: Issues And Models Of Doctoral Education In Public Health, Linda Neuhauser, Dawn M. Richardson, Sonja Mackenzie, Meredith Minkler

Community Health Faculty Publications and Presentations

Finding solutions to complex health problems, such as obesity, violence, and climate change, will require radical changes in cross-disciplinary education, research, and practice. The fundamental determinants of health include many interrelated factors such as poverty, culture, education, environment, and government policies. However, traditional public health training has tended to focus more narrowly on diseases and risk factors, and has not adequately leveraged the rich contributions of sociology, anthropology, economics, geography, communication, political science, and other disciplines. Further, students are often not sufficiently trained to work across sectors to translate research findings into effective, large-scale sustainable actions. During the past 2 …

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Stochastic Comparisons Of Parallel Systems When Component Have Proportional Hazard Rates, Subhash C. Kochar, Maochao Xu Jan 2007

Stochastic Comparisons Of Parallel Systems When Component Have Proportional Hazard Rates, Subhash C. Kochar, Maochao Xu

Mathematics and Statistics Faculty Publications and Presentations

Let Χ1, … Χn be independent random variables with Χᵢ having survival function Fλᵢ, i=1, … , n, and let Y₁, … , Yn be a random sample with common population survival distribution Fλ, where λ = Σᵢ=₁nλᵢl n. Let Χn:n and Yn:n denote the lifetimes of the parallel systems consisting of these components, respectively. It is shown that Xn:n is greater than Yn:n in terms of likelihood ratio order. It is also proved that the sample range Χn:n - Χ₁:n is larger than Yn n:n - Y₁:n according to reverse hazard rate ordering. These two results …

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Using Simulation To Evaluate Global Software Development Task Allocation Strategies, Siri-On Setamanit, Wayne Wakeland, David Raffo Jan 2007

Using Simulation To Evaluate Global Software Development Task Allocation Strategies, Siri-On Setamanit, Wayne Wakeland, David Raffo

Complex Systems Faculty Publications and Presentations

We describe a hybrid computer simulation model of the software development process that is specifically architected to study alternative ways to configure global software development (GSD) projects, including phase-based, module-based, and follow-the-sun allocation strategies. The model is a hybrid system dynamics and discrete-event model. In this paper, test cases have been developed for each allocation strategy, and project duration is computed for each configuration under a range of plausible assumptions for key parameters. The primary finding is that although under ideal assumptions follow-the-sun is able to produce impressive reductions in time-to-market, under more realistic assumptions the reverse is true, thus …

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Estimating Nutrient Uptake By Mature Tree Roots Under Field Conditions: Challenges And Opportunities, Melissa S. Lucash, Dave M. Eissenstat, J. Devereux Joslin, Karis J. Mcfarlane, Ruth D. Yanai Jan 2007

Estimating Nutrient Uptake By Mature Tree Roots Under Field Conditions: Challenges And Opportunities, Melissa S. Lucash, Dave M. Eissenstat, J. Devereux Joslin, Karis J. Mcfarlane, Ruth D. Yanai

Environmental Science and Management Faculty Publications and Presentations

Nutrient uptake by roots of mature trees is difficult to measure accurately under field conditions using existing methods. In this review, we discuss current techniques for measuring uptake at the root surface including excised roots, isotopic tracers, autoradiography, depletion, and lysimeters. Although these methods have provided many insights, each has drawbacks. Estimates of uptake are affected by the sampling scheme, experimental conditions, whether roots are excised or not, concentrations of ions, and the rate of efflux of ions. Microbes and mycorrhizas can also affect estimates of uptake. A greater focus on methods development is critical to advancing our understanding of …

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Three-Dimensional Structure Of Cdx (X= Se, Te) Nanocrystals By Total X-Ray Diffraction, S. K. Pradhan, Z. T. Deng, F. Tang, Y. Ren, Peter Moeck, V. Petkov Jan 2007

Three-Dimensional Structure Of Cdx (X= Se, Te) Nanocrystals By Total X-Ray Diffraction, S. K. Pradhan, Z. T. Deng, F. Tang, Y. Ren, Peter Moeck, V. Petkov

Physics Faculty Publications and Presentations

The three-dimensional structure of oleic acid-capped CdSe and thiol-capped CdTe nanocrystals used as quantum dots has been determined by total synchrotron radiationx-ray diffraction and atomic pair distribution function analysis. Both CdSe and CdTe are found to exhibit the zinc-blende-type atomic ordering. It is only slightly distorted in CdSe implying the presence of nanosize domains and very heavily distorted in CdTe due to the presence of distinct core-shell regions. The results well demonstrate the great potential of the experimental approach and thus encourage its wider application in quantum dot research.

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Tienen Ventajas Cognitivas Los Bilingües Sobre Los Monolingües?, Eva NúÑEz-MéNdez Jan 2007

Tienen Ventajas Cognitivas Los Bilingües Sobre Los Monolingües?, Eva NúÑEz-MéNdez

World Languages and Literatures Faculty Publications and Presentations

Desde comienzos del s. XIX hasta aproximadamente los años 60, se creía entre los investigadores que el bilingiüsmo resultaba perjudicial para el pensamiento, ya que provocaba la reducción por la mitad no sólo del desarrollo intelectual sino también del espiritual. Esta ideología se ha extendido ampliamente en los EEUU en el s. XX: el bilingüismo trae consigo más desventajas que beneficios en términos de cognición. El bilingüismo se presenta como una carga sobre el cerebro, provocando confusión mental, inhibición de la lengua mayoritaria, e incluso división de la personalidad.

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The Topology Of Surface Mediatrices, James Bernhard, J. J. P. Veerman Jan 2007

The Topology Of Surface Mediatrices, James Bernhard, J. J. P. Veerman

Mathematics and Statistics Faculty Publications and Presentations

Given a pair of distinct points p and q in a metric space with distance d, the mediatrix is the set of points x such that d(x,p)=d(x,q). In this paper, we examine the topological structure of mediatrices in connected, compact, closed 2-manifolds whose distance function is inherited from a Riemannian metric. We determine that such mediatrices are, up to homeomorphism, finite, closed simplicial 1-complexes with an even number of incipient edges emanating from each vertex. Using this and results from [J.J.P. Veerman, J. Bernhard, Minimally separating sets, mediatrices and Brillouin spaces, Topology Appl., in press], we give the classification …

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Feral Swine Action Plan For Oregon, Mark Sytsma, Arick Christopher Rouhe Jan 2007

Feral Swine Action Plan For Oregon, Mark Sytsma, Arick Christopher Rouhe

Center for Lakes and Reservoirs Publications and Presentations

Feral swine are defined as free roaming animals of the genus Sus that are not being held under domestic management or confinement. Swine have spread from Europe and Russia to habitats around the world via human introduction. Currently, feral swine populations are established on every continent except Antarctica. Unlike other large mammal invaders, swine have a high reproductive capacity and are omnivorous, which allows for a quick assimilation into most habitats. Once a breeding population is established in an area, the population can quickly increase and negatively impact the ecosystem. A successful invasion of feral swine is difficult, and sometimes …

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Dna Multiplex Hybridization On Microarrays And Thermodynamic Stability In Solution: A Direct Comparison, Daniel J. Fish, M. Todd Horne, Greg P. Brewood, Jim P. Goodarzi, Saba Alemayehu, Ashwini Bhandiwad, Robert P. Searles, Albert S. Benight Jan 2007

Dna Multiplex Hybridization On Microarrays And Thermodynamic Stability In Solution: A Direct Comparison, Daniel J. Fish, M. Todd Horne, Greg P. Brewood, Jim P. Goodarzi, Saba Alemayehu, Ashwini Bhandiwad, Robert P. Searles, Albert S. Benight

Chemistry Faculty Publications and Presentations

Hybridization intensities of 30 distinct short duplex DNAs measured on spotted microarrays, were directly compared with thermodynamic stabilities measured in solution. DNA sequences were designed to promote formation of perfect match, or hybrid duplexes containing tandem mismatches. Thermodynamic parameters DeltaH degrees , DeltaS degrees and DeltaG degrees of melting transitions in solution were evaluated directly using differential scanning calorimetry. Quantitative comparison with results from 63 multiplex microarray hybridization experiments provided a linear relationship for perfect match and most mismatch duplexes. Examination of outliers suggests that both duplex length and relative position of tandem mismatches could be important factors contributing to …

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Some Recent Results On Stochastic Comparisons And Dependence Among Order Statistics In The Case Of Phr Model, Subhash C. Kochar, Maochao Xu Jan 2007

Some Recent Results On Stochastic Comparisons And Dependence Among Order Statistics In The Case Of Phr Model, Subhash C. Kochar, Maochao Xu

Mathematics and Statistics Faculty Publications and Presentations

This paper reviews some recent results on stochastic orders and dependence among order statistics when the observations are independent and follow the proportional hazard rates model.

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Locally Conservative Fluxes For The Continuous Galerkin Method, Bernardo Cockburn, Jay Gopalakrishnan, Haiying Wang Jan 2007

Locally Conservative Fluxes For The Continuous Galerkin Method, Bernardo Cockburn, Jay Gopalakrishnan, Haiying Wang

Mathematics and Statistics Faculty Publications and Presentations

The standard continuous Galerkin (CG) finite element method for second order elliptic problems suffers from its inability to provide conservative flux approximations, a much needed quantity in many applications. We show how to overcome this shortcoming by using a two step postprocessing. The first step is the computation of a numerical flux trace defined on element inter- faces and is motivated by the structure of the numerical traces of discontinuous Galerkin methods. This computation is non-local in that it requires the solution of a symmetric positive definite system, but the system is well conditioned independently of mesh size, so it …

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Bulletin: General Catalog Issue 2007-2008, Portland State University Jan 2007

Bulletin: General Catalog Issue 2007-2008, Portland State University

Bulletin & Curriculum Change Documents

No abstract provided.

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Curriculum Change 2007-2008, Portland State University Jan 2007

Curriculum Change 2007-2008, Portland State University

Bulletin & Curriculum Change Documents

No abstract provided.

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Nietzsche's Debt To Kant's Theory Of The Beautiful In 'Birth Of Tragedy', R. Kevin Hill Jan 2007

Nietzsche's Debt To Kant's Theory Of The Beautiful In 'Birth Of Tragedy', R. Kevin Hill

Philosophy Faculty Publications and Presentations

Nietzsche describes Birth of Tragedy as a contribution to “the science of aesthetics”. In this paper, I will argue that a crucial influence on his emerging views was Kant’s Critique of Judgment. Nietzsche’s early aesthetic views are often attributed to some combination of Schopenhauer’s analyses of the plastic arts (inspiring Nietzsche’s conception of the Apollinian) and his analysis of music (inspiring Nietzsche’s conception of the Dionysian) along with Nietzsche’s own original insights into how these combine to form the tragic. As we shall see, the resources of Schopenhauer’s aesthetics were unavailable to Nietzsche due to epistemological commitments he had …

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Fabrication Of Carbon Nanotube-Based Nanodevices Using A Combination Technique Of Focused Ion Beam And Plasma-Enhanced Chemical Vapor Deposition, Jianfeng Wu, Micah Eastman, Timothy Gutu, Madeline Wyse, Jun Jiao, S.-M. Kim, M. Mann, Y. Zhang, K. B. Teo Jan 2007

Fabrication Of Carbon Nanotube-Based Nanodevices Using A Combination Technique Of Focused Ion Beam And Plasma-Enhanced Chemical Vapor Deposition, Jianfeng Wu, Micah Eastman, Timothy Gutu, Madeline Wyse, Jun Jiao, S.-M. Kim, M. Mann, Y. Zhang, K. B. Teo

Physics Faculty Publications and Presentations

This study focuses on the fabrication of two nanodevice prototypes which utilized vertical and horizontal carbon nanotubes used the focused ion beam to localize the catalysts, followed by plasma-enhanced chemical vapor deposition. First, metal-gated carbon nanotube field emitter arrays were fabricated on multilayer substrates containing an imbedded catalyst layer. Second, horizontally aligned single-walled carbon nanotubes were grown on a transmission electron microscopy grid. This allows the carbon nanotubes to be directly analyzed in a transmission electron microscope. It is expected that the methodology introduced here will open up opportunities for the direct fabrication of carbon nanotube based nanodevices.

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Selective Growth Of Single-Crystalline Zno Nanowires On Doped Silicon, Rolf Könenkamp, Robert Campbell Word, M. Dosmailov, J. Meiss, Athavan Nadarajah Jan 2007

Selective Growth Of Single-Crystalline Zno Nanowires On Doped Silicon, Rolf Könenkamp, Robert Campbell Word, M. Dosmailov, J. Meiss, Athavan Nadarajah

Physics Faculty Publications and Presentations

We report the growth of single-crystalline ZnO nanowires on n- and p-type Si wafers by electrodeposition. On strongly doped n-type Si high-quality nanowires can be grown under similar conditions as used for metallic substrates. For low electron concentrations occurring in weakly n-type or in p-type wafers, nanowire growth is inhibited. This difference allows selective growth in strongly n-type areas. The inhibited growth on weakly n-type and p-type wafers can be improved by applying stronger cathodic electrode potentials or by illuminating the growth area. The wires on n-Si show efficient electroluminescence covering the visible and extending into the ultraviolet spectral range.

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Portland State Magazine, Portland State University. Office Of University Communications Jan 2007

Portland State Magazine, Portland State University. Office Of University Communications

Portland State Magazine

PSU’s alumni magazine, published 2-3 times a year. In this issue: It’s murder told in an unusual way that has this English professor fascinated; students chronicle their Education Abroad experiences through winning photographs; new chemistry faculty and facilities are advancing drug discovery and development; and more.

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The Evolution Of Altruism: Game Theory In Multilevel Selection And Inclusive Fitness, Jeffrey Fletcher, Martin Zwick Jan 2007

The Evolution Of Altruism: Game Theory In Multilevel Selection And Inclusive Fitness, Jeffrey Fletcher, Martin Zwick

Complex Systems Faculty Publications and Presentations

Although the prisoner's dilemma (PD) has been used extensively to study reciprocal altruism, here we show that the n-player prisoner's dilemma (NPD) is also central to two other prominent theories of the evolution of altruism: inclusive fitness and multilevel selection. An NPD model captures the essential factors for the evolution of altruism directly in its parameters and integrates important aspects of these two theories such as Hamilton's rule, Simpson's paradox, and the Price covariance equation. The model also suggests a simple interpretation of the Price selection decomposition and an alternative decomposition that is symmetrical and complementary to it. In some …

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Spinoza And Gödel: Causa Sui And Undecidable Truth, Martin Zwick Jan 2007

Spinoza And Gödel: Causa Sui And Undecidable Truth, Martin Zwick

Complex Systems Faculty Publications and Presentations

Spinoza distinguishes between causation that is external, as in A causing B where A is external to B, and causation that is internal, where C causes itself (causa sui), without any involvement of anything external to C. External causation is easy to understand, but self-causation is not. This note explores an approach to self-causation based upon Gödelian undecidability and draws upon ideas from an earlier study of Gödel’s proof and the quantum measurement problem (Zwick, 1978).

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Inductive Learning Of Quantum Behaviors, Marek Perkowski, Martin Lukac Jan 2007

Inductive Learning Of Quantum Behaviors, Marek Perkowski, Martin Lukac

Electrical and Computer Engineering Faculty Publications and Presentations

In this paper studied are new concepts of robotic behaviors - deterministic and quantum probabilistic. In contrast to classical circuits, the quantum circuit can realize both of these behaviors. When applied to a robot, a quantum circuit controller realizes what we call quantum robot behaviors. We use automated methods to synthesize quantum behaviors (circuits) from the examples (examples are cares of the quantum truth table). The don’t knows (minterms not given as examples) are then converted not only to deterministic cares as in the classical learning, but also to output values generated with various probabilities. The Occam Razor principle, fundamental …

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Bridges And Barriers To Developing And Conducting Interdisciplinary Graduate-Student Team Research, Max Nielsen-Pincus, Wayde Cameron Morse, Jo Ellen Force, J. D. Wulfhorst Jan 2007

Bridges And Barriers To Developing And Conducting Interdisciplinary Graduate-Student Team Research, Max Nielsen-Pincus, Wayde Cameron Morse, Jo Ellen Force, J. D. Wulfhorst

Environmental Science and Management Faculty Publications and Presentations

Understanding complex socio-environmental problems requires specialists from multiple disciplines to integrate research efforts. Programs such as the National Science Foundation’s Integrative Graduate Education and Research Traineeship facilitate integrated research efforts and change the way academic institutions train future leaders and scientists. The University of Idaho and the Tropical Agricultural Research and Higher Education Center in Costa Rica collaborate on a joint research program focusing on biodiversity conservation and sustainable production in fragmented landscapes. We first present a spectrum of integration ranging from disciplinary to transdisciplinary across seven aspects of the research process. We then describe our experiences and lessons learned …

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Research Summary: Characteristics Of Exemplary Schools For Young Adolescents, P. Gayle Andrews, Micki M. Caskey, Vincent A. Anfara Jr. Jan 2007

Research Summary: Characteristics Of Exemplary Schools For Young Adolescents, P. Gayle Andrews, Micki M. Caskey, Vincent A. Anfara Jr.

Curriculum and Instruction Faculty Publications and Presentations

Two dangers are associated with any list purporting to include the characteristics of exemplary schools for young adolescents. One danger is a perception that the list is exhaustive—that it includes everything that needs to be considered. In reality, a list cannot capture the subtleties and complexities of schooling. A second danger is that each component will be seen as somehow self-contained, something that can be addressed in isolation. Instead, research demonstrates that the characteristics listed above are “an interacting and interdependent group of practices that form a unified whole… [that] must be dealt with holistically, systemically, to ensure success” (Jackson …

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Oregon Spartina Response Plan, Mary Pfauth, Mark Sytsma, Dennis Isaacson Jan 2007

Oregon Spartina Response Plan, Mary Pfauth, Mark Sytsma, Dennis Isaacson

Center for Lakes and Reservoirs Publications and Presentations

Four introduced, invasive species of Spartina (cordgrass) have been present in estuarine areas of the U.S. west coast for over a century. These Spartina species are ecological engineers- they cause severe alternations in the hydrology and food webs of invaded estuaries that are detrimental to native wildlife and commercial and recreational uses. Oregon has been relatively free of these weeds, with only two known infestations. One infestation was eradicated by Oregon Department of Agriculture and the other is currently under eradication by The Nature Conservancy.

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Public Perception: New Math And Reform Mathematics, Daniel L. Canada Jan 2007

Public Perception: New Math And Reform Mathematics, Daniel L. Canada

Northwest Journal of Teacher Education

Since connections are made in the public mind between current reform efforts in mathematics education and the changes of the past which were collectively called "new math,", the purpose of this paper is to examine these two movements more closely. First, the beginning of both movements is examined, including not only a look at the supporters of each movement, but also an examination of their initial motivations. Next, the implementation of each movement is described, both by pro.filing the main features and by looking at how they were actually put into practice. Lastly, the impact of these movements is detailed, …

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Quantum Physics And Welfare Policy?, Jack C. Straton Jan 2007

Quantum Physics And Welfare Policy?, Jack C. Straton

Physics Faculty Publications and Presentations

Welfare policy is examined through the paradoxical logic of Nagarjuna’s tetralema, providing a lens through which wave-particle duality in quantum mechanics is then viewed. Through this process students are challenged to radically expand their critical-thinking horizons beyond conventional dualistic bounds. They learn not only this key property of quantum reality, but have to come to grips with the nature of knowledge itself, and the degree to which they censor their own awarenesses.

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Valuing New Jersey's Natural Capital: An Assessment Of The Economic Value Of The State's Natural Resources, Robert Costanza Jan 2007

Valuing New Jersey's Natural Capital: An Assessment Of The Economic Value Of The State's Natural Resources, Robert Costanza

Institute for Sustainable Solutions Publications and Presentations

This report is divided into three main parts. Part I presents essential background information, summarizes the detailed findings of Parts II and III and their limitations, and explores in a preliminary way the policy implications of the natural capital project and the future research needs in this area. Part II focuses on ecosystem services and Part III deals with ecosystem goods.

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Middle Columbia River Aquatic Nuisance Species Survey, Robyn Draheim, Mark D. Sytsma, Rich Miller, Jeffery Cordell Jan 2007

Middle Columbia River Aquatic Nuisance Species Survey, Robyn Draheim, Mark D. Sytsma, Rich Miller, Jeffery Cordell

Center for Lakes and Reservoirs Publications and Presentations

Aquatic nonindigenous species (ANS) in the middle Columbia and lower Snake rivers were surveyed during the summer of 2006. The project area included eight reservoirs and the free-flowing, Hanford Reach on the Columbia River. We also conducted a literature review to create a complete list of ANS for the study area.

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Modular Polyketide Synthases And Cis Double Bond Formation:  Establishment Of Activated Cis-3-Cyclohexylpropenoic Acid As The Diketide Intermediate In Phoslactomycin Biosynthesis, Mamoun M. Alhamadsheh, Nadaraj Palaniappan, Suparna Daschouduri, Kevin A. Reynolds Jan 2007

Modular Polyketide Synthases And Cis Double Bond Formation:  Establishment Of Activated Cis-3-Cyclohexylpropenoic Acid As The Diketide Intermediate In Phoslactomycin Biosynthesis, Mamoun M. Alhamadsheh, Nadaraj Palaniappan, Suparna Daschouduri, Kevin A. Reynolds

Chemistry Faculty Publications and Presentations

The majority of modular polyketide synthase (PKS) systems which generate unsaturated products do so with trans double bonds. Phoslactomycin B (PLM B) presents a class of antitumor and antiviral natural polyketide products that have unique structural features, including a linear unsaturated backbone with one trans and three cis double bonds. There is substantial evidence that trans double bonds are established by ketoreductase-dehydratase (KR-DH) didomains within a PKS module. In cases where modules containing these didomains appear to generate product containing a cis double bond there is no experimental evidence to determine if they do so directly, or if they also …

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