Physical Sciences and Mathematics Commons^™

Interview With Janet Corbett, Warm Springs Forest Products, 2006 (Audio), Janet Corbett

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Interview of Janet Corbett by Margie Crawford at Warm Springs, Oregon on August 10th, 2006.

The interview index is available for download.

Europium(Iii) Macrocyclic Complexes With Alcohol Pendant Groups As Chemical Exchange Saturation Transfer Agents, Mark Woods, Donald E. Woessner, Piyu Zhao, Azhar Pasha, Meng-Yin Yang, Ching-Hui Huang, Olga Vasalatiy, Janet R. Morrow, A. Dean Sherry

Chemistry Faculty Publications and Presentations

Paramagnetic lanthanide(III) complexes that contain hyperfine-shifted exchangeable protons offer considerable advantages over diamagnetic molecules as chemical exchange saturation transfer (CEST) agents for MRI. As part of a program to investigate avenues to improve the sensitivity of such agents, the CEST characteristics of europium(III) macrocyclic complexes having appended hydroxyethyl groups were investigated. The CEST spectrum of the asymmetrical complex, EuCNPHC³⁺, shows five distinct peaks for each magnetically nonequivalent exchangeable proton in the molecule. The CEST spectra of this complex were fitted to NMR Bloch theory to yield exchange rates between each of six exchanging proton pools (five on the …

Interview With Marc Gaudin, The Joinery, 2006 (Audio), Marc Gaudin

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Interview of Marc Gaudin by Amber Kinter at The Joinery, Portland, Oregon on August 8th, 2006.

The interview index is available for download.

Interview With Ryan Temple, Hfhc, 2006 (Audio), Ryan Temple

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Interview of Ryan Temple by Amber Kinter at Portland, Oregon on August 4th, 2006.

The interview index is available for download.

Interview With Sarah Deumling, Zena Timber, 2006 (Audio), Sarah Deumling

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Interview of Sarah Deumling by Glenn Esler at Rickreall, Oregon on August 4th, 2006.

The interview index is available for download.

Interview With Richard Pine, O'Neill Pine Company, 2006 (Audio), Richard Pine

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Interview of Richard Pine by Margie Crawford in Salem, Oregon on August 3rd, 2006.

The interview index is available for download.

Interview With Adam Olsen, Parr Lumber, 2006 (Audio), Adam Olsen

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Born in Portland, Adam Olsen worked for Parr Lumber for ten years as a contractor salesman.

The interview index is available for download.

Seaside, Oregon, Tsunami Pilot Study : Modernization Of Fema Flood Hazard Maps, Frank I. González, Eric L. Geist, Costas Synolakis, Diego Rodriguez Arcas, Douglas Bellomo, David Carlton, Thomas Horning, Bruce Jaffe, Jeff Johnson, Utku Kânoğlu, Harold O. Mofjeld, Jean Newman, Thomas Parsons, Robert Peters, Curt D. Peterson, George Priest, Vasily V. Titov, Angie J. Venturato, Joseph Weber, Florence L. Wong, Ahmet Yalçıner

Geology Faculty Publications and Presentations

FEMA Flood Insurance Rate Map (FIRM) guidelines do not currently exist for conducting and incorporating tsunami hazard assessments that reflect the substantial advances in tsunami research achieved in the last two decades; this conclusion is the result of two FEMA-sponsored workshops and the associated Tsunami Focused Study (Chowdhury et al., 2005). Therefore, as part of FEMA's Map Modernization Program, a Tsunami Pilot Study was carried out in the Seaside/Gearhart, Oregon, area to develop an improved Probabilistic Tsunami Hazard Assessment (PTHA) methodology and to provide recommendations for improved tsunami hazard assessment guidelines. The Seaside area was chosen because it is typical …

Interview With Peter Hayes, Hyla Woods, 2006 (Audio), Peter Hayes

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Interview of Peter Hayes by Glen Esler on July 28th, 2006.

The interview index is available for download.

The Value Of New Jersey's Ecosystem Services And Natural Capital, Robert Costanza, Matthew A. Wilson, Austin Troy, Alexey Voinov, Shang Liu, John D'Agostino

Institute for Sustainable Solutions Publications and Presentations

This report summarizes the results of a two-year study of the economic value of New Jersey's natural capital. Natural capital consists of those components of the natural environment that provide a long-term stream of benefits to individual people and to society as a whole; the value of natural capital is defined in this report as the present value of that benefit stream. Many of the benefits provided by natural capital come from ecological systems ('ecosystems'); an ecosystem is a dynamic complex of plant, animal, and microorganism communities and their nonliving environment, all interacting as a functional unit. The benefits provided …

Toward An Ecological Economy, Robert Costanza

Institute for Sustainable Solutions Publications and Presentations

This section comments on an article by Lester Brown published in the July 2006 issue of The Futurist describing what an ecological economy might look like, at least in its technical dimensions. Brown points out that if economic progress is to be sustained, the fossil-fuel-based, automobile-centered, throwaway economy must be replaced with a new economic model. To do this, we need to create a new vision of what the economy is, what it is for and how to measure success. There is substantial new psychological research in the emerging science of happiness that shows the limits of conventional economic income …

Decreasing Emissions Of Methane From Rice Agriculture, M. A. K. Khalil, Martha J. Shearer

Environmental Science and Management Faculty Publications and Presentations

Methane emissions from rice fields are controlled by several key factors. The most important are the application of organic soil amendments and water management: whether the fields are flooded intermittently or continuously. The total annual emissions from any country or the world are thus affected by the area of rice harvested, and a composite emission factor that takes into account how the various agricultural practices are distributed in terms of fertilizer use and water management, as well as other less important variables. Over decades the area of rice harvested changes but so does the composite emission factor. The product therefore, …

Estuarine Habitat Mitigation In Oregon: Policy Review, Analysis, And Recommended Improvements, Anna Buckley

Environmental Science and Management Professional Master's Project Reports

The report is organized in the following manner. After the introductory chapter (Chapter 1), Chapter Two describes Oregon's current estuarine policy and related state and federal policies. Chapter Three provides an inventory of recent permitted impacts and associated estuarine resource replacement. Chapter Four consists of a brief summary of the status of estuarine ecology and restoration/mitigation, with knowledge gaps identified. Chapter Five discusses wetland functional assessment tools and options for compensatory mitigation. This chapter begins with a description of the tidal Hydrogeomorphic (HGM) assessment method, how it compares to the estuarine resource replacement rules' relative values table, and the utility …

Correction To "Dependence, Dispersiveness, And Multivariate Hazard Rate Ordering", Baha-Eldin Khaledi, Subhash C. Kochar

Mathematics and Statistics Faculty Publications and Presentations

In the article published last year, three inequalities should be in the opposite direction.

Nonlocal Effects On Optical And Molecular Interactions With Metallic Nanoshells, P.T. Leung, Railing Chang

Physics Faculty Publications and Presentations

Theoretical studies of the optical response of metallic nanoshells have been carried out, where quantum effects are partially accounted for through the application of a nonlocal response model for shells of mesoscopic dimensions. Both far field and near field interactions are considered, with the incident source being a plane wave and an emitting molecular dipole, respectively. It is found that these nonlocal effects can lead to significant deviations from macroscopic electrodynamic theory, for shells of ultrasmall dimensions (nm) or ultrathin thickness (~1 nm), and are particularly significant for processes involving higher multipolar responses of the nanoshells. It is further concluded …

Hydrodynamic Mediation Of Density-Dependent Growth And Adult-Juvenile Interactions Of A Spionid Polychaete, Brent T. Hentschel, Amy A. Larson

Environmental Science and Management Faculty Publications and Presentations

Abstract We performed an experiment to test the effects of adult density on the growth rates of juvenile Polydora cornuta. Our experiment was performed in three identical counter-rotating annular flumes, each set to one of three different flow speeds for a period of 3 d (U 5mm = 3, 6, or 12 cm s^-1 , where U_5mm = velocity measured 5 mm above bottom). We implanted replicate vials containing a premeasured juvenile P. cornuta and either 0, 2, or 5 adults into a 2-cm layer of sediment in the flume. The relative growth rates of the juveniles …

Nonlinear Dynamics Derived From The Oxyhalogen Oxidation Of Selected Organosulfur Compounds, Edward Chickwana

Dissertations and Theses

Structure, stability, kinetics and mechanisms of oxidation of some physiologically important organosulfur compounds were studied and the results obtained show that oxidation occurs mainly at the reactive sulfur center of the molecules. These results not only display the usual S-oxygenation pathways that have been observed with most thiocarbamides, but also show dimerization and cyclization.

The oxidation of guanylthiourea, GTU, was studied in the presence of mildly acidic iodate and the strong oxidants bromate and bromine. The GTU reaction dynamics with iodate show clock reaction characteristics and oligooscillatory formation of iodine both in excess oxidant and reductant. The major oxidation product …

Similarity-Based Constitutive Relations For Local Mass Fluxes In Incompressible Mixing Layers, John D. Ramshaw

Physics Faculty Publications and Presentations

The local concentrations of the two fluids within a mixing layer produced by an interfacial instability are determined by their individual continuity equations. Solution of these equations requires constitutive relations for the local mass fluxes of the two fluids. We derive explicit analytical expressions for these fluxes in planar incompressible mixing layers characterized by a single integral length scale h(t), which is presumed to be provided by a suitable mix or turbulence model. Elementary scaling arguments imply that in mixing layers of this type, the mean volume fraction profile α(x,t) depends on x and t only through the similarity variable …

Linking Ecology And Economics For Ecosystem Management, Stephen Farber, Robert Costanza, Daniel L. Childers, Jon Erickson, Katherine Gross, Morgan Grove, Charles S. Hopkinson, James Kahn, Stephanie Pincetl, Austin Troy, Paige Warren, Matthew Wilson

Institute for Sustainable Solutions Publications and Presentations

This article outlines an approach, based on ecosystem services, for assessing the trade-offs inherent in managing humans embedded in ecological systems. Evaluating these trade-offs requires an understanding of the biophysical magnitudes of the changes in ecosystem services that result from human actions, and of the impact of these changes on human welfare.We summarize the state of the art of ecosystem services?based management and the information needs for applying it. Three case studies of Long Term Ecological Research (LTER) sites?coastal, urban, and agricultural? illustrate the usefulness, information needs, quantification possibilities, and methods for this approach. One example of the application of …

A Stable Isotopic Investigation Of A Polar Desert Hydrologic System, Mcmurdo Dry Valleys, Antarctica, Michael N. Gooseff, W. Berry Lyons, Diane M. Mcknight, Bruce H. Vaughn, Andrew G. Fountain, Carolyn Dowling

Geology Faculty Publications and Presentations

The hydrologic system of the coastal McMurdo Dry Valleys, Antarctica, is defined by snow accumulation, glacier melt, stream flow, and retention in closed-basin, ice-covered lakes. During the austral summers from 1993-1996 and 1999-2000 to 2002-2003, fresh snow, snow pits, glacier ice, stream water, and lake waters were sampled for the stable isotopes deuterium (D) and 18O in order to resolve sources of meltwater and the interactions among the various hydrologic reservoirs in the dry valleys. This data set provides a survey of the distribution of natural water isotope abundances within the well-defined dry valley hydrologic system in Taylor Valley, which …

2005 Diamond Lake Submersed Aquatic Vegetation Survey, Mark D. Sytsma, Mary Pfauth

Center for Lakes and Reservoirs Publications and Presentations

Diamond Lake is a large natural lake having a surface area of some 3214 acres (1300.7 hectares) and a maximum depth of 52 feet (15.8 meters). It is located within the Umpqua National Forest in the Southern Cascade Mountains of Oregon, at an elevation of over 5000 feet (>1524 meters). Diamond Lake is a high-use waterbody that supports angling, public campgrounds, recreational boating, swimming, and water skiing. The human activity associated with the lake has been a significant contributor to the economy of southern Oregon since the early part of the twentieth century.

Historically Diamond Lake was fishless but …

Interview With Myo Demayo, Urbanstead Farm (Audio), Myo Demayo

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Interview of Myo DeMayo by Tyler Anderson.

The interview index is available for download.

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Head Tilt-Translation Combinations Distinguished At The Level Of Neurons, Jan E. Holly, Sarah E. Pierce, Gin Mccollum

Gin McCollum

Angular and linear accelerations of the head occur throughout everyday life, whether from external forces such as in a vehicle or from volitional head movements. The relative timing of the angular and linear components of motion differs depending on the movement. The inner ear detects the angular and linear components with its semicircular canals and otolith organs, respectively, and secondary neurons in the vestibular nuclei receive input from these vestibular organs. Many secondary neurons receive both angular and linear input. Linear information alone does not distinguish between translational linear acceleration and angular tilt, with its gravity-induced change in the linear …

Binary Decision Diagrams And Crisp Possibilistic Reconstructability Analysis, Martin Zwick, Alan Mishchenko

Systems Science Faculty Publications and Presentations

The paper discusses the application of Binary Decision Diagrams (BDDs) in the reconstructability analysis of crisp possibilistic systems. In particular, we show how BDDs can be used to represent set-theoretic relations and implement the three basic operations of reconstructability analysis.

Image-Based Nanocrystallography With Online Database Support, Peter Moeck, Ján Zahornadsky, Boris Dusek

Physics Faculty Publications and Presentations

The crystallographic phase and morphology of many materials change with the crystal size so that new needs arise to determine the crystallography of nanocrystals. Direct space high-resolution phase-contrast transmission electron microscopy (HRTEM) and atomic resolution scanning TEM (STEM) when combined with tools for image-based nanocrystallography in two (2D) and three (3D) dimensions possess the capacity to meet these needs. After a concise discussion of lattice-fringe visibility spheres and maps, this paper discusses lattice-fringe fingerprinting in 2D and tilt protocol applications. On-line database developments at Portland State University (PSU) that support image-based nanocrystallography are also mentioned.

Lattice Fringe Fingerprinting In Two Dimensions With Database Support, Peter Moeck, B. Seipel, R. Bjorge, P. Fraundorf

Physics Faculty Publications and Presentations

A brief introduction to lattice fringe fingerprinting in two dimensions (2D) with database support is given. The method is employed for the identification of the crystal phase of a small ensemble of nanocrystals. The enhanced viability of this method in aberration-corrected transmission electron microscopes (TEMs) and scanning TEMs (STEMs) is also illustrated.

Variation In The Response Of Crustacean Zooplankton Species Richness And Composition To The Invasive Predator Bythotrephes Longimanus, Angela L. Strecker, Shelley E. Arnott, Norman D. Yan, Robert Girard

Environmental Science and Management Faculty Publications and Presentations

The predacious invertebrate Bythotrephes longimanus has invaded >90 freshwater lakes in North America. There is some evidence that B. longimanus has a negative effect on summer zooplankton species richness; however, no study has examined the effect of B. longimanus throughout the ice-free season in more than one lake. We visited 10 invaded and 4 reference lakes every 2 weeks from May to September, collecting B. longimanus, crustacean zooplankton, and water chemistry samples. Composite samples were pooled across the study season for each lake. Bythotrephes longimanus significantly reduced cladoceran species richness, diversity, and abundance, and the total zooplankton community also exhibited …

Changes In Riparian Vegetation Buffers In Response To Development In Three Oregon Cities, J. Alan Yeakley, Connie P. Ozawa, A. M. Hook

Environmental Science and Management Faculty Publications and Presentations

Riparian vegetation buffer loss was investigated for three cities with contrasting local regulatory controls in urbanizing northwest Oregon. The cities examined were Hillsboro, Oregon City and Portland, all having experienced high rates of population increase in the 1990s. All cities are covered under Oregon’s land use law that provides goals for the protection of open space and natural resources. On the municipality level, regulatory controls in Portland included a system of environmental zoning for riparian area protection, while regulatory controls on development in riparian areas in Hillsboro and Oregon City were less stringent. Digital aerial photographs covering buffer areas within …

Using Student Generated Qualitative Ecological Models, J. Scott Blackwood, Marion Dresner, Hang-Kwang Luh

Environmental Science and Management Faculty Publications and Presentations

In this activity, students construct qualitative models of an ecosystem and use the models to gain a better understanding of direct and indirect ecological interactions. Qualitative modeling is described for use in two procedures, each with different educational goals and student backgrounds in mind. Part 1 is designed with the non-major or beginning ecology student in mind, and is intended both to improve student understanding of the ecosystem of interest and to provide a framework for the instructor to assess student learning. Part 2 is designed for more advanced students of ecology and involves the use of modeling software (POWERPLAY) …

The Convergence Of V-Cycle Multigrid Algorithms For Axisymmetric Laplace And Maxwell Equations, Jay Gopalakrishnan, Joseph E. Pasciak

Mathematics and Statistics Faculty Publications and Presentations

We investigate some simple finite element discretizations for the axisymmetric Laplace equation and the azimuthal component of the axisymmetric Maxwell equations as well as multigrid algorithms for these discretizations. Our analysis is targeted at simple model problems and our main result is that the standard V-cycle with point smoothing converges at a rate independent of the number of unknowns. This is contrary to suggestions in the existing literature that line relaxations and semicoarsening are needed in multigrid algorithms to overcome difficulties caused by the singularities in the axisymmetric Maxwell problems. Our multigrid analysis proceeds by applying the well known regularity …