Index Catalog // ScholarsArchive@OSU

Note on a baroclinic analogue of vorticity defects in shear

Creator:: Samelson, Roger M.
Abstract:: An approach developed recently to study the dynamics of vorticity defects in homogeneous shear flow extends naturally to the case of baroclinic, quasi-geostrophic flow. It is shown that an inviscid geostrophic flow with uniform vertical shear may be destabilized by introducing a `potential vorticity defect', an arbitrarily small but sufficiently...
Resource Type:: Article
Full Text:: ) = S0[1 + εFS (z/ε)], U ′(z) = Γ [1 + εFV (z/ε)], where the ‘defect’ 368 R. M. Samelson profile

Lyapunov, Floquet, and singular vectors for baroclinic waves

Creator:: Samelson, Roger M.
Abstract:: The dynamics of the growth of linear disturbances to a chaotic basic state is analyzed in an asymptotic model of weakly nonlinear, baroclinic wave-mean interaction. In this model, an ordinary differential equation for the wave amplitude is coupled to a partial differential equation for the zonal flow correction. The leading...
Resource Type:: Article
Full Text:: baroclinic waves R. M. Samelson College of Oceanic and Atmospheric Sciences, 104 Ocean Admin Bldg, Oregon

Observations and modelling of fronts and frontogenesis in the upper ocean

Creator:: Samelson, Roger M.
Resource Type:: Dissertation

The cross-equatorial structure of tropical instability waves in sea surface height

Creator:: Lyman, John M.
Abstract:: A linearized model with two vertical modes has been developed to understand observed characteristics of monthly variability in the Equatorial Pacific from TOPEX/POSEIDON measurements of Sea Surface Height (SSH). The 2-mode model is obtained from an equatorial beta plane model that has been linearized about a geostrophically balanced mean flow...
Resource Type:: Dissertation
Full Text:: Instability Waves in Sea Surface Height by John M. Lyman A DISSERTATION submitted to Oregon State

Instability of the Chaotic ENSO: The Growth-Phase Predictability Barrier

Creator:: Samelson, Roger M. and Tziperman, Eli
Abstract:: The local predictability of the El Nin˜o–Southern Oscillation (ENSO) is examined by the analysis of the evolution of small disturbances to an unstable 4.3-yr ENSO cycle in the Cane–Zebiak model forced by perpetual July conditions. The 4.3-yr cycle represents the dominant near-recurrent behavior in this weakly chaotic regime, so analysis...
Resource Type:: Article
Full Text:: -Phase Predictability Barrier ROGER M. SAMELSON College of Oceanic and Atmospheric Sciences, Oregon

A modeling study of katabatic flows

Creator:: Smith, Craig M.
Abstract:: A modeling study is undertaken to better understand the physics of katabatic flows. This study is divided into three topics; a comparison between a large eddy simulation (LES) and a mesoscale model of katabatic flows, a sensitivity study of katabatic flows to various physical parameters, and an investigation into the...
Resource Type:: Masters Thesis
Full Text:: pleasure to work with him. I would also like to thank the members of my committee, Dr. Roger Samelson, Dr

Internal Boundary Layer Scaling in “Two Layer” Solutions of the Thermocline Equations

Creator:: Samelson, R. M.
Abstract:: The diffusivity dependence of internal boundary layers in solutions of the continuously stratified, diffusive thermocline equations is revisited. If a solution exists that approaches a two-layer solution of the ideal thermocline equations in the limit of small vertical diffusivity kᵥ, it must contain an internal boundary layer that collapses to...
Resource Type:: Article
Full Text:: itself relied on an assump- Corresponding author address: Dr. Roger M. Samelson, College of Oceanic and

Large-Scale Circulation with Locally Enhanced Vertical Mixing

Creator:: Samelson, R. M.
Abstract:: The influence of localized regions of intensified vertical mixing on the stratification and circulation in a large-scale ocean model is investigated with idealized numerical experiments. Numerical solutions are obtained of a closed-basin, single-hemisphere ocean model based on the planetary geostrophic equations. Mesoscale eddy effects are minimized, and vertical mixing at...
Resource Type:: Article
Full Text:: Vertical Mixing* R. M. SAMELSON Woods Hole Oceanographic Institution, Woods Hole, Massachusetts

Geostrophic Circulation in a Rectangular Basin with a Circumpolar Connection

Creator:: Samelson, R. M.
Abstract:: A simple theory is presented for steady geostrophic circulation of a stratified fluid in a rectangular basin with a circumpolar connection. The interior flow obeys the β-plane Sverdrup vorticity balance, and the circulation is closed by geostrophic boundary currents. The circulation is forced by surface thermal gradients and wind-driven Ekman...
Resource Type:: Article
Full Text:: to analytical models that Corresponding author address: Dr. Roger M. Samelson, College of Oceanic

Rogers TWS Final PDF.pdf

Creator:: Rogers, Natalie M., Hanselmann, Rhea, and Jolles, Anna E.
Abstract:: To examine the influence of forest management on wildlife immunity, the innate immune system of wild deer mice (Peromyscus maniculatus) inhabiting forest plots of different management intensities in the Oregon coast range was measured by bactericidal assay. Bactericidal activity was compared across three management levels, including 40-50 year old forest...
Full Text:: Immunity of Wild Deer Mice (Peromyscus maniculatus)? Natalie M. Rogers1, Rhea Hanselmann1, and Anna E

Rogers TWS Final.pptx

Creator:: Rogers, Natalie M., Hanselmann, Rhea, and Jolles, Anna E.
Abstract:: To examine the influence of forest management on wildlife immunity, the innate immune system of wild deer mice (Peromyscus maniculatus) inhabiting forest plots of different management intensities in the Oregon coast range was measured by bactericidal assay. Bactericidal activity was compared across three management levels, including 40-50 year old forest...

Towed thermister chain observations of fronts in the subtropical North Pacific

Creator:: Samelson, Roger M. and Paulson, Clayton A.
Abstract:: A thermistor chain was towed 1400 km through the eastern North Pacific subtropical frontal zone in January 1980. The observations resolve surface layer temperature features with horizontal wavelengths of 0.2-200 km and vertical scales of 10-70 m. The dominant features, which have horizontal wavelengths of 10-100 km, amplitudes of 0.2°-1.0°C,...
Resource Type:: Article
Full Text:: Towed Thermistor Chain Observations of Fronts in the Subtropical North Pacific ROGER M. SAMELSON 1

Singular Vectors and Time-Dependent Normal Modes of a Baroclinic Wave-Mean Oscillation

Creator:: Wolfe, Christopher L. and Samelson, Roger M.
Abstract:: Linear disturbance growth is studied in a quasigeostrophic baroclinic channel model with several thousand degrees of freedom. Disturbances to an unstable, nonlinear wave-mean oscillation are analyzed, allowing the comparison of singular vectors and time-dependent normal modes (Floquet vectors). Singular vectors characterize the transient growth of linear disturbances in a specified...
Resource Type:: Article
Full Text:: Wave-Mean Oscillation CHRISTOPHER L. WOLFE* AND ROGER M. SAMELSON College of Oceanic and Atmospheric

Normal-Mode Analysis of a Baroclinic Wave-Mean Oscillation

Creator:: Wolfe, Christopher L. and Samelson, Roger M.
Abstract:: The stability of a time-periodic baroclinic wave-mean oscillation in a high-dimensional two-layer quasigeostrophic spectral model is examined by computing a full set of time-dependent normal modes (Floquet vectors) for the oscillation. The model has 72 × 62 horizontal resolution and there are 8928 Floquet vectors in the complete set. The...
Resource Type:: Article
Full Text:: CHRISTOPHER L. WOLFE AND ROGER M. SAMELSON College of Oceanic and Atmospheric Sciences, Oregon State

Quasi-Geostrophic Topographically Generated Mean Flow over the Continental Margin

Creator:: Samelson, Roger M. and Allen, J. S.
Abstract:: Observations of oppositely directed, monthly mean alongshore currents and wind stress over the continental margin off the Pacific coast of North America motivate the theoretical examination of mean flow generation by topographic lee-wave drag. We formulate a barotropic model for wind-forced shelf-slope flow over variable topography. Our central objective is...
Resource Type:: Article

Semigeostrophic Wind-Driven Thermocline Upwelling at a Coastal Boundary

Creator:: Samelson, Roger M. and de Szoeke, Roland A.
Abstract:: We formulate analytically and solve numerically a semigeostrophic model for wind-driven thermocline upwelling at a coastal boundary. The model has a variable-density entraining mixed layer and two homogeneous interior layers. All variables are uniform alongshore. The wind stress and surface heating are constant. The system is started from rest, with...
Resource Type:: Article

m-em9027fallandwinter.pdf

Creator:: Oregon State University. Extension Service, Langellotto, Gail Ann, Anderson-Wilk, Mark, Bauer, Michael E., Dreves, Amy J., Fick, Barbara Jean, Gentle, Tom, Glick, G. (Gail), Locke, Kerry A., Long, L. E. (Lynn Edwards), 1953-, Lundin, Fred, Maul, Jerry Lee, McNeilan, Jan, McNeilan, Ray A., Morgan, Steve, Patterson, Pat, Penhallegon, Ross H., 1951-, Reynolds, Janice, Rogers, Bill, Rost, Bob, Savonen, Carol, Tiger, George, VanDerZanden, Ann Marie, 1966-, Weeks, Tom, and Welch, Teresa
Abstract:: A publication containing advice on a wide range of gardening topics, including composting, container gardens, fall/winter gardens, fertilizing, insect pests, plant diseases, planting guidelines, raised beds, site selection, slugs, soil improvement, tilling, warm-season crops, watering, and weeds. Includes regional tips for various parts of Oregon.

Lagrangian characteristics of continental shelf flows forced by periodic wind stress

Creator:: Kuebel Cervantes, Brandy T., Allen, John S., and Samelson, Roger M.
Abstract:: The coastal ocean may experience periods of fluctuating along-shelf wind direction, causing shifts between upwelling and downwelling conditions with responses that are not symmetric. We seek to understand these asymmetries and their implications on the Eulerian and Lagrangian flows. We use a two-dimensional (variations across-shelf and with depth; uniformity along-shelf)...
Resource Type:: Article
Full Text:: , and R. M. Samelson College of Oceanic and Atmospheric Sciences, Oregon State Univ., 104 Ocean Admin

Numerical Simulation of Air–Sea Coupling during Coastal Upwelling

Creator:: Perlin, Natalie, Skyllingstad, Eric D., Samelson, Roger M., and Barbour, Philip L.
Abstract:: Air–sea coupling during coastal upwelling was examined through idealized three-dimensional numerical simulations with a coupled atmosphere–ocean mesoscale model. Geometry, topography, and initial and boundary conditions were chosen to be representative of summertime coastal conditions off the Oregon coast. Over the 72-h simulations, sea surface temperatures were reduced several degrees near...
Resource Type:: Article
Full Text:: University, Corvallis, Oregon ROGER M. SAMELSON College of Oceanic and Atmospheric Sciences, and

Coastal Atmospheric Circulation around an Idealized Cape during Wind-Driven Upwelling Studied from a Coupled Ocean–Atmosphere Model

Creator:: Perlin, Natalie, Skyllingstad, Eric D., and Samelson, Roger M.
Abstract:: The study analyzes atmospheric circulation around an idealized coastal cape during summertime upwelling-favorable wind conditions simulated by a mesoscale coupled ocean–atmosphere model. The domain resembles an eastern ocean boundary with a single cape protruding into the ocean in the center of a coastline. The model predicts the formation of an...
Resource Type:: Article
Full Text:: , Corvallis, Oregon ROGER M. SAMELSON College of Oceanic and Atmospheric Sciences, and Cooperative Institute

DewarCEOASVentilatedPoolModel.pdf

Creator:: Dewar, W. K., Samelson, Roger M., and Vallis, G. K.
Abstract:: An analytical model of subtropical mode water is presented, based on ventilated thermocline theory and on numerical solutions of a planetary geostrophic basin model. In ventilated thermocline theory, the western pool is a region bounded on the east by subsurface streamlines that outcrop at the western edge of the interior,...
Full Text:: . DEWAR The Florida State University, Tallahassee, Florida R. M. SAMELSON College of Oceanic and

LDT228final.pdf

Creator:: Dewar, W. K., Samelson, Roger M., and Vallis, G. K.
Abstract:: An analytical model of subtropical mode water is presented, based on ventilated thermocline theory and on numerical solutions of a planetary geostrophic basin model. In ventilated thermocline theory, the western pool is a region bounded on the east by subsurface streamlines that outcrop at the western edge of the interior,...
Full Text:: of mode waters.J. Mar. Res., 40 suppl, 427–464. Samelson, R. M., 1999. Note on a baroclinic

Modeled ocean circulation in Nares Strait and its dependence on landfast-ice cover

Creator:: Shroyer, Emily L., Samelson, Roger M., Padman, Laurie, and Münchow, Andreas
Abstract:: Two simplified ocean simulations are used to study circulation and transport within Nares Strait. The simulations are similar, except that one included a coupled sea ice model that effectively established a landfast ice cover throughout the simulation year. Comparison between the ocean-only and ocean-ice simulations reveals a systematic change in...
Resource Type:: Article
Full Text:: Nares Strait and its dependence on landfast-ice cover Emily L. Shroyer1, Roger M. Samelson1, Laurie

Time-Dependent Adjustment in a Simple Model of the Mid-Depth Meridional Overturning Cell

Creator:: Samelson, R. M.
Abstract:: A recently proposed reduced-gravity model of the warm-water branch of the middepth meridional overturning circulation in a rectangular basin with a circumpolar connection is extended to include time dependence. The model describes the balance between gain of warm water through northward Ekman advection across the circumpolar current, loss of warm...
Resource Type:: Article
Full Text:: of the Mid-Depth Meridional Overturning Cell R. M. SAMELSON College of Oceanic and Atmospheric

The Vertical Structure of Linear Coastal-Trapped Disturbances

Creator:: Samelson, R. M.
Abstract:: The vertical structure of coastal-trapped disturbances in several idealized models of a stably stratified lower atmosphere is examined. The vertical structure and phase speeds of the trapped modes depend on the resting stratification and the height of the orographic step. The presence of a stable layer above the boundary layer...
Resource Type:: Article
Full Text:: , Oregon. Corresponding author address: Dr. R. M. Samelson, College of Oceanic and Atmospheric Sciences

Periodic Orbits and Disturbance Growth for Baroclinic Waves

Creator:: Samelson, R. M.
Abstract:: The growth of linear disturbances to stable and unstable time-periodic basic states is analyzed in an asymptotic model of weakly nonlinear, baroclinic wave–mean interaction. In this model, an ordinary differential equation for the wave amplitude is coupled to a partial differential equation for the zonal-flow correction. Floquet vectors, the eigenmodes...
Resource Type:: Article
Full Text:: Growth for Baroclinic Waves R. M. SAMELSON College of Oceanic and Atmospheric Sciences, Oregon State

John R. Commons, his assault on laissez-faire

Creator:: Harter, Lafayette G., Jr.
Resource Type:: Book
Full Text:: Governor Robert M. LaFollette, Sr. (later Senator), Commons played a frequent and an important role in

Dynamical Analysis of the Boundary Layer and Surface Wind Responses to Mesoscale SST Perturbations

Creator:: O'Neill, Larry W., Esbensen, Steven K., Thum, Nicolai, Samelson, Roger M., and Chelton, Dudley B.
Abstract:: The dynamical response of the marine atmospheric boundary layer (MABL) to mesoscale sea surface temperature (SST) perturbations is investigated over the Agulhas Return Current during winter from a 1-month, high-resolution, three-dimensional simulation using the Weather Research and Forecasting (WRF) mesoscale model. A steady lower boundary condition for July 2002 is...
Resource Type:: Article
Full Text:: , Naval Research Laboratory, Monterey, California STEVEN K. ESBENSEN, NICOLAI THUM, AND ROGER M. SAMELSON

Global observations of large oceanic eddies

Creator:: Chelton, Dudley B., Schlax, Michael C., Samelson, Roger M., and de Szoeke, Roland A.
Abstract:: Ten years of sea-surface height (SSH) fields constructed from the merged TOPEX/Poseidon (T/P) and ERS-1/2 altimeter datasets are analyzed to investigate mesoscale variability in the global ocean. The higher resolution of the merged dataset reveals that more than 50% of the variability over much of the World Ocean is accounted...
Resource Type:: Article
Full Text:: B. Chelton,1 Michael G. Schlax,1 Roger M. Samelson,1 and Roland A. de Szoeke1 Received 26 May 2007

Satellite Observations of Mesoscale Eddy-Induced Ekman Pumping

Creator:: Gaube, Peter, Chelton, Dudley B., Samelson, Roger M., Schlax, Michael G., and O'Neill, Larry W.
Abstract:: Three mechanisms for self-induced Ekman pumping in the interiors of mesoscale ocean eddies are investigated. The first arises from the surface stress that occurs because of differences between surface wind and ocean velocities, resulting in Ekman upwelling and downwelling in the cores of anticyclones and cyclones, respectively. The second mechanism...
Resource Type:: Article
Full Text:: ,* DUDLEY B. CHELTON, ROGER M. SAMELSON, MICHAEL G. SCHLAX, AND LARRY W. O’NEILL College of Earth, Ocean

Modification of Long Equatorial Rossby Wave Phase Speeds by Zonal Currents

Creator:: Durland, Theodore S., Samelson, Roger M., Chelton, Dudley B., and de Szoeke, Roland A.
Abstract:: Previously unaddressed aspects of how equatorial currents affect long Rossby wave phase speeds are investigated using solutions of the shallow-water equations linearized about quasi-realistic currents. Modification of the background potential vorticity (PV) gradient by curvature in the narrow equatorial currents is shown to play a role comparable to the Doppler...
Resource Type:: Article
Full Text:: Phase Speeds by Zonal Currents THEODORE S. DURLAND, ROGER M. SAMELSON, DUDLEY B. CHELTON, AND ROLAND A

Modeling the Atmospheric Boundary Layer Wind Response to Mesoscale Sea Surface Temperature Perturbations

Creator:: Perlin, Natalie, de Szoeke, Simon P., Chelton, Dudley B., Samelson, Roger M., Skyllingstad, Eric D., and O'Neill, Larry W.
Abstract:: The wind speed response to mesoscale SST variability is investigated over the Agulhas Return Current region of the Southern Ocean using the Weather Research and Forecasting (WRF) Model and the U.S. Navy Coupled Ocean–Atmosphere Mesoscale Prediction System (COAMPS) atmospheric model. The SST-induced wind response is assessed from eight simulations with...
Resource Type:: Article
Full Text:: B. CHELTON, ROGER M. SAMELSON, ERIC D. SKYLLINGSTAD, AND LARRY W. O’NEILL College of Earth, Ocean

Wind-Forced variability of the deep eastern north Pacific: Observations of seafloor pressure and abyssal currents

Creator:: Niiler, P. P., Filloux, J., Liu, W. T., Samelson, Roger M., Paduan, J. D., and Paulson, C. A.
Abstract:: Data from an array of bottom pressure gauges and a string of current meters in the vicinity of 47°N, 139°W, are used to examine the deep-ocean variability forced by ocean surface wind stress curl from August 1987 to June 1988. Bottom geostrophic currents are computed from the pressure gauge array,...
Resource Type:: Article
Full Text:: , 2 R. M. SAMELSON, 3 J. D. PADUAN, • AND C. A. PAULSON 4 Data from an array of bottom pressure

A nested grid model of the Oregon Coastal Transition Zone: Simulations and comparisons with observations during the 2001 upwelling season

Creator:: Springer, S. R., Samelson, Roger M., Allen, John S., Egbert, Gary D., Kurapov, Alexander, Miller, Robert N., and Kindle, J. C.
Abstract:: The Oregon Coastal Transition Zone (OCTZ) extends several hundred kilometers offshore where shelf flows interact with the northern California Current. A primitive-equation numerical ocean model is used to study the upwelling circulation in this region from 1 May to 1 November 2001. This OCTZ model obtains initial and boundary conditions...
Resource Type:: Article
Full Text:: . Springer,1,2 R. M. Samelson,1 J. S. Allen,1 G. D. Egbert,1 A. L. Kurapov,1 R. N. Miller,1 and J. C

Atmospheric forcing of the Oregon coastal ocean during the 2001 upwelling season

Creator:: Bane, John M., Levine, Murray D., Samelson, Roger M., Haines, S. M., Meaux, M. F., Perlin, Natalie, Kosro, P. Michael, and Boyd, Timothy John, 1958-2013
Abstract:: Meteorological conditions during an intensive oceanographic observational program in May through August 2001 along the central Oregon coast are described and related to larger-scale and longer-term conditions. Southward wind stresses of 0.05-0.1 N m⁻² occurred roughly 75% of the time, with a sustained period of dominantly southward stress from mid-June...
Resource Type:: Article
Full Text:: during the 2001 upwelling season J. M. Bane,1 M. D. Levine,2 R. M. Samelson,2 S. M. Haines,1 M. F

Trace element distribution in igneous minerals and liquids

Creator:: Forsythe, Lance M.
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Lance M. Forsythe for the degree

Partitioning of rare earth and high field strength elements between pargasitic amphibole and silicate melts

Creator:: Hilyard, Mark D.
Resource Type:: Masters Thesis
Full Text:: Strength Elements Between Pargasitic Amphibole and Silicate Melts. Abstract approved: Roger Nielsen

Evaluation of factors contributing to the failure of cast iron water mains

Creator:: Takahashi, Gilbert Tamaji
Abstract:: An evaluation was made of factors contributing to the service failure of a 12 inch diameter cast iron water pipe in Pendleton, Oregon. The quality of the pipe was found to be acceptable when compared to the acceptance limits established by the American National Standards Institute, Inc. However it exhibited...
Resource Type:: Masters Thesis
Full Text:: FACTORS CONTRIBUTING TO THE FAILURE OF CAST IRON WATER MAINS Approved by: r's I "Professor Roger

Modeling global hammond landform regions from 250-m elevation data

Creator:: Karagulle, Deniz, Frye, Charlie, Sayre, Roger, Breyer, Sean, Aniello, Peter, Vaughan, Randy, and Wright, Dawn
Abstract:: Landforms are natural features on the Earth’s surface that both reflect and shape geophysical and ecological process. The result is a defining part of landscapes that so often impact on human perception and interactions with environment. Blascyznki (1997) defines landforms as, “specific geomorphic features on the surface of the Earth,...
Resource Type:: Preprint and Article
Full Text:: Global 250-m Elevation Data Deniz Karagülle Environmental Systems Research Institute, Inc

A household production approach to modeling household recycling effort

Creator:: Martini, Roger
Abstract:: Household recycling is an important means by which social costs of solid waste disposal may be reduced. These costs include energy and resource costs of collection and disposal as well as environmental costs from emissions from landfills, incinerators, and collection vehicles. In this thesis, a household production model is used...
Resource Type:: Masters Thesis
Full Text:: Abstract Approved: An Abstract of the Thesis of Roger Martini

A method for estimation of generalized linear models when explanatory variables contain meaurement error

Creator:: Sauter, Roger M.
Abstract:: This thesis considers the problem of estimating the linear parameters of generalized linear models (GLM), especially binomial and Poisson regression models, when the explanatory variable is subject to measurement error. In this situation, the dependence of the response variable on the observed explanatory variable cannot typically be modeled as a...
Resource Type:: Dissertation
Full Text:: explanatory variables contain meaurement error AN ABSTRACT FOR THE THESIS OF Roger M. Sauter for the degree

Guarantees and requirements : implementation and complexity analysis of a new model of types for declarative visual programming languages

Creator:: Chen, Roger Ding-Fu
Abstract:: Djang et al. [1998] introduced a new model of types for declarative visual programming languages (VPLs). Implicit static typing is used in their type model, in order to eliminate the programming mechanisms associated with type declarations, provide immediate visual feedback with respect to type errors and guarantee type safe programs....
Resource Type:: Masters Thesis
Full Text:: of Roger Ding-Fu Chen for the degree of Master of Science in Computer Science presented on

Baroclinic Frontal Instabilities and Turbulent Mixing in the Surface Boundary Layer. Part I: Unforced Simulations

Creator:: Skyllingstad, Eric D. and Samelson, R. M.
Abstract:: Interaction between mixed layer baroclinic eddies and small-scale turbulence is studied using a nonhydrostatic large-eddy simulation (LES) model. Free, unforced flow evolution is considered, for a standard initialization consisting of an 80-m-deep mixed layer with a superposed warm filament and two frontal interfaces in geostrophic balance, on a model domain...
Resource Type:: Article
Full Text:: Turbulent Mixing in the Surface Boundary Layer. Part I: Unforced Simulations ERIC D. SKYLLINGSTAD AND R. M

Toward an Uncertainty Budget for a Coastal Ocean Model

Creator:: Kim, Sangil, Samelson, R. M., and Snyder, Chris
Abstract:: Estimates of three components of an uncertainty budget for a coastal ocean model in a wind-forced regime are made based on numerical simulations. The budget components behave differently in the shelf regime, inshore of the 200-m isobath, and the slope-interior regime, between the 200-m isobath and a fixed longitude (1268W)...
Resource Type:: Article
Full Text:: Ocean Model SANGIL KIM AND R. M. SAMELSON College of Oceanic and Atmospheric Sciences, Oregon State

Air–Sea Fluxes over the Gulf Stream Region: Atmospheric Controls and Trends

Creator:: Shaman, Jeffrey, Samelson, R. M., and Skyllingstad, Eric
Abstract:: The intraseasonal variability of turbulent surface heat fluxes over the Gulf Stream extension and subtropical mode water regions of the North Atlantic, and long-term trends in these fluxes, are explored using NCEP–NCAR reanalysis. Wintertime sensible and latent heat fluxes from these surface waters are characterized by episodic high flux events...
Resource Type:: Article
Full Text:: : Atmospheric Controls and Trends JEFFREY SHAMAN, R. M. SAMELSON, AND ERIC SKYLLINGSTAD College of Oceanic and

Ensemble-Based Estimates of the Predictability of Wind-Driven Coastal Ocean Flow over Topography

Creator:: Kim, Sangil, Samelson, R. M., and Snyder, Chris
Abstract:: The predictability of coastal ocean circulation over the central Oregon shelf, a region of strong wind-driven currents and variable topography, is studied using ensembles of 50-day primitive equation ocean model simulations with realistic topography, simplified lateral boundary conditions, and forcing from both idealized and observed wind time series representative of...
Resource Type:: Article
Full Text:: Predictability of Wind-Driven Coastal Ocean Flow over Topography SANGIL KIM AND R. M. SAMELSON College of

Complex Wavenumber Rossby Wave Ray Tracing

Creator:: Shaman, Jeffrey, Samelson, R. M., and Tziperman, Eli
Abstract:: This paper presents a methodology for performing complex wavenumber ray tracing in which both wave trajectory and amplitude are calculated. This ray-tracing framework is first derived using a scaling in which the imaginary wavenumber component is assumed to be much smaller than the real wavenumber component. The approach, based on...
Resource Type:: Article
Full Text:: JEFFREY SHAMAN Department of Environmental Health Sciences, Columbia University, New York, New York R. M

Factors associated with the social climate of single-sex and coeducational residence halls, cooperatives, fraternities, and sororities, on the Oregon State University campus

Creator:: Frichette, Steven Roger
Abstract:: The purpose of this research was to examine factors associated with the social climate of single-sex and coeducational residence halls, fraternities, sororities, and cooperatives on the Oregon State University campus. The primary sources of data for this study were student responses to the ten subscales of the URES Form R,...
Resource Type:: Dissertation
Full Text:: . M. Amano, and Dr. L. G. Harter, Jr. A note of appreciation is due Dr. Roger G. Peterson for his

High performance liquid chromatography of the staphylococcal enterotoxins

Creator:: Williams, Robert Roy
Abstract:: Many methods in use today for the isolation, purification, and identification of the staphylococcal enterotoxins involve lengthy steps with significant loss of enterotoxin, are subject to interference from contaminating sample components, and lack sufficient specificity. Culture extracts of enterotoxin producing Staphylococcus aureus strains (enterotoxins A-E), crude enterotoxin preparations (enterotoxins A-E),...
Resource Type:: Dissertation
Full Text:: ACKNOWLEDGEUENTS I wish to express my deepest appreciation to Paul R. Elliker and Virgil M. Hiatt, for

A partial characterization of high and low molecular weight immunoglobulin in rainbow trout (Salmo gairdneri)

Creator:: O'Leary, Patrick John
Resource Type:: Dissertation
Full Text:: approximately 1-2 x 10 5 M 1 . No maturation of the immune response was detected. Based on the above data it

Immunosuppression induced by staphylococcal enterotoxin B

Creator:: Donnelly, Raymond Peter
Resource Type:: Masters Thesis
Full Text:: Completed October 30, 1981 Commencement June 1982 APPROVED: Redacted for privacy Professor of M

A partial characterization of the immune response to polyvinyl pyrrolidone

Creator:: Adams-Burton, Catherine Ruth
Resource Type:: Masters Thesis
Full Text:: . Edited by M. Hanna. Plenum Press, New York. 2:265. Beverley, P., J. Woody, F. Dunkerley, M. Feldmann and

A test of hypothesis for a patterned correlation matrix : a Monte Carlo study

Creator:: Jan, Shan Wu
Resource Type:: Dissertation
Full Text:: MONTE CARLO STUDY Abstract app roved:_Redacted for Privacy `/ Roger G. Petersen An approximate

The effects of pantothenic acid on respiration activity

Creator:: Pratt, Ernest Fay
Resource Type:: Masters Thesis
Full Text:: is greati indebted to Dr. Roger J. Vi11iams for his resourceful and insirationa1 gtiidance in this

Experimental determination of the temperature and compositional dependences of rare earth element, Y, and Sc partitioning between high-Ca clinopyroxene and natural mafic to intermediate silicate melts

Creator:: Gallahan, William E.
Resource Type:: Masters Thesis
Full Text:: Between High-Ca Clinopyroxene and Natural Mafic to Intermediate Silicate Melts Abstract approved: Roger

Suppression of cellular immune responses by Candida albicans

Creator:: Rivas Espinoza, Victor G.
Abstract:: Experimental infection of mice with Candida albicans leads to significant suppression of cell mediated immune responses. We have characterized the nature of this candida-induced suppression with formalin killed Candida albicans (FKCA) in the yeast and mycelia' phase. Mice (BALB/c or C57B1/6J) treated with FKCA exhibited a reduction in the T-cell...
Resource Type:: Masters Thesis
Full Text:: was obtained from Hoffman LaRoche (Nutley, NJ). Both inhibitors were used from 10 -7 to 10 -10 M in

The nature and extent of the problems experienced by international students enrolled in an English language program

Creator:: Sonari, Alateme Jesse
Resource Type:: Dissertation
Full Text:: two of my initial committee members left for responsibilities in other establishments. Dr. J. Roger

The effects of inositol crystalline vitamin B₁ and pantothenic acid on the growth of different strains of yeast

Creator:: Saunders, Donald Herbert
Resource Type:: Masters Thesis
Full Text:: culture. Since these two grew very much more rapidly, the seeding was reduced to 0.04 m. After seeding

A study of freshmen student attitudes and behavior toward alcohol in relation to their parents attitudes about alcohol

Creator:: Shoemaker, Thomas Alexander
Abstract:: The purpose of this study was to examine the relationship between parental attitudes and student attitudes toward the consumption of alcoholic beverages, between parental attitudes toward the consumption of alcoholic beverages and the reasons students drink alcoholic beverages, and between parental attitudes toward the consumption of alcoholic beverages and the...
Resource Type:: Dissertation
Full Text:: their Parent's Attitudes about Alcohol Abstract approved: J Roger Penn The purpose of this study was

The relationship between value orientation and meanspiritedness

Creator:: Deckard, C. Kathleen
Abstract:: This study examines empirically the relationship of value orientation to meanspiritedness. Meanspiritedness (a collection of acts, thoughts and/or attitudes which are intentionally malicious) was defined and a scoring method was designed. The management level of self-interest in individuals as indicated by their value orientation and religious orientation was examined. Additionally,...
Resource Type:: Masters Thesis
Full Text:: Value Orientation and Meanspiritedness Abstract approved: J. Roger enn This study examines

High population planting-patterns for maximum yield in field corn

Creator:: Oupadissakoon, Surapon
Abstract:: The influence of planting patterns and plant spacings on grain yield in field corn (Zea mays) was studied at the Oregon State University Botany and Plant Pathology Field Laboratory near Corvallis, Oregon in 1969. Plant characteristics and yield components studied included plant height, ear height, number of ears, ear weight...
Resource Type:: Masters Thesis
Full Text:: -PATTERNS FOR MAXIMUM YIELD IN FIELD CORN Abstract approved Roger K. Fendall The influence of planting

Modeling academic performance change from high school to college

Creator:: Brown, Wayne E. (Wayne Edward), 1943-
Abstract:: This research was undertaken to identify variables that accounted for major changes in academic performance between high school and college. Differences between predicted and actual college GPA were used to classify students as gainers or decliners among a group of sophomores and a group of seniors at a medium-sized research...
Resource Type:: Dissertation
Full Text:: interest in higher education. Dr. J. Roger Penn, Chair of my committee, provided even-handed leadership

Sex-role identity differences as a function of place of residence of male college students

Creator:: Whipple, Edward George
Abstract:: The purpose of this investigation was to determine whether sex-role identification differences among college students were related to place of residence, and if so, whether certain factors affect these differences. Six hypotheses were developed. The study sought to ascertain if sex-role identification is related to certain dimensions of peer association...
Resource Type:: Dissertation
Full Text:: approved: Redacted for Privacy Dr. I. !roger Penn The purpose of this investigation was to determine

Physiology of Rhizoctonia and its relation to Botryobasidium

Creator:: Liu, Tsui-Chieh
Resource Type:: Dissertation
Full Text:: in this rk. For specimens and cultures I must thank Dr. C. E. Owens, Dr. D. P. Rogers, Dr. S. M

Value differences in university living groups

Creator:: Abbott, Kaye Glenda
Abstract:: The purpose of this study was to explore possible differences in value patterns of students residing in four types of university living environments--residence halls, Greek houses, cooperatives, and off campus dwellings. The Rokeach Value Survey was utilized as the major measurement tool for identification of the value patterns of students....
Resource Type:: Masters Thesis
Full Text:: : VALUE DIFFERENCES IN UNIVERSITY LIVING GROUPS Abstract approved: Redacted for Privacy Drf'J. Roger Penn

Biotic acid: a new growth principle

Creator:: Eakin, Robert Edward
Resource Type:: Masters Thesis
Full Text:: author wishes to express his sincere aopreciation for the advice and encouragement given by Dr. Roger

Quality of effort and perceptions of attainment as affected by variables in the education of the adult undergraduate student

Creator:: Brenner, Vernon J.
Abstract:: The purpose of this investigation was to determine whether certain variables have significant bearing on the education of adult undergraduate students. During the 1970's Pace (1977) and Shaver (1978) suggested that the "quality of effort" that college and university students invest in their own learning and development is a key...
Resource Type:: Dissertation
Full Text:: been successful, its success owes to the following people: J. Roger Penn, my major professor, whose

The relationship of locus of control to career development in college engineering students

Creator:: Flynn, Cynthia A.
Abstract:: The purpose of this study was to examine the relationship between career development and locus of control as they relate to barriers encountered in career development. The sample included 144 students in the engineering program at Oregon State University. The Rotter Internal- External Scale and the Career Development Inventory (Form...
Resource Type:: Dissertation
Full Text:: through, my sincere thanks. To my major professor, Roger Penn, I owe a special gratitude for his wisdom

The effect of pantothenic acid on the growth of various genera of bacteria

Creator:: Stanbery, Sue Robbins
Resource Type:: Masters Thesis
Full Text:: . Roger . Williams, who directed this research, and for the assistance and suggestions of Dr. C. P

Relationship between moral development and personality type of University undergraduates

Creator:: McMahon, Timothy R.
Abstract:: The purpose of this study was to investigate the relationship between moral development and year in school, gender, and personality type for university undergraduates. Moral development was measured by the Defining Issues Test (DIT) and personality was assessed using the Myers-Briggs Type Indicator (MBTI). The sample consisted of 320 freshmen,...
Resource Type:: Dissertation
Full Text:: . I'd like to thank my committee, J. Roger Penn (chair), Will Holsberry, Tom Murphy, Dow Poling, and

Pantothenic acid : its distribution in biological tissues

Creator:: Lyman, Carl Morris
Resource Type:: Masters Thesis
Full Text:: --rice bran. In general the the tissue in o% m and evaporating the contained colloidal little

Correlations between crystal orientation, deformation texture, and indentation anisotropy in tungsten and molybdenum single crystals

Creator:: Sandwith, Colin John
Resource Type:: Dissertation
Full Text:: ,- < ACKNOWLEDGMENT The author wishes to thank his major professor, Dr. Roger Dean 011eman, Professor of

The selective oxidation of organic compounds particularly by iodic acid

Creator:: Woods, Melford Allan
Resource Type:: Masters Thesis
Full Text:: Solution. Ear1r '.oric, as referrd to by . M. Koithoif (7) eugested the feasibility of uslng cold

Control of peak stresses in tensile testing machine components subjected to shock loading

Creator:: Mitchell, Jack Alan
Abstract:: The mechanical properties of materials at cryogenic temperatures have been the subject of increasing interest during the past few years, although very little actual materials testing has been done at extremely low temperatures because of the high cost and low heat of vaporaization of liquid helium. Recently, the Department of...
Resource Type:: Masters Thesis
Full Text:: components subjected to shock loading AN ABSTRACT OF THE THESIS OF JACK ALAN MITCHELL for the M. S. in

Postsecondary student consumerism : a national Delphi forecast of developments and articulation of policy options

Creator:: Franks, Robert Grover
Abstract:: The purpose of this research, expressed in two coequal parts, was: to establish a forecast of developments and an articulation of policy options vis-a-vis postsecondary student consumerism; and to determine if interest groups of experts differed significantly in their evaluations of the aforementioned developments and policy options. The Delphi technique...
Resource Type:: Dissertation
Full Text:: Options Redacted for Privacy Abstract approved: DR. J. ROGER PENN Purpose and Procedure The purpose of

Willamette and associated soils on late Pleistocene geomorphic surfaces, Polk County, Oregon

Creator:: Gelderman, Frederick W.
Abstract:: The morphology and genesis of soils of the Willamette series and of some Willamette-associated soils and their relationships to geomorphic surfaces were studied in an area near McCoy, Polk County, Oregon. Influences of regional extent, such as climate and parent material, were related to the soils and landforms. The soils...
Resource Type:: Masters Thesis
Full Text:: approved: Redacted for privacy Dr. Roger B. Parsons The morphology and genesis of soils of the Willamette

The nutritional requirements of Trichophyton interdigitale

Creator:: Mosher, William Allison
Resource Type:: Masters Thesis
Full Text:: results: No. .04 rngs. culture Lold media iigs. moist Seeding ces. yeasts/cc. i G. M. Yeast 0 .75

Attitudes of executive level administrators regarding the purpose of student services in higher education

Creator:: Roth, Stephen Elliott
Resource Type:: Dissertation
Full Text:: Student Services in Higher Education Abstract approved: J. Roger Pen The purpose of the research was to

Resupinate pore fungi in Oregon

Creator:: Cooke, William Bridge
Resource Type:: Masters Thesis
Full Text:: '!m. Bridge Cooke (University of Cincinnati), are discussed at length on the basis of micro- soDpio

The relationship between pantothenic acid and vitamin G

Creator:: Holaday, Duncan Asa
Resource Type:: Masters Thesis
Full Text:: ., Lyman, C. M., Goodyear, G. H., Truesdail J. H., and Holeday, D., J. Am. Chem. Soc., 55, 2912 f1933

The ionization constant of pantothenic acid

Creator:: Moser, Robin Emerson
Resource Type:: Masters Thesis
Full Text:: , tbe re- sultin; color m cozrìp:red with those of standards contsin- Ing nnwn amounts of salicylic

Male attitude toward equality for women as a correlate of self-concept

Creator:: Lewis, Yvonne Pelletier
Resource Type:: Masters Thesis
Full Text:: : Redacted for privacy DrJ J: Roger Penn The purpose of this study was to determine whether or not a

Catastrophic propagation of ductile cracks in metallic foils

Creator:: Elliott, Leonard Thomas
Abstract:: The sudden failure of metal structures under load, which has been a design problem for many years, is characterized by a crack propagation rate which approaches the speed of sound in the material. These failures, which are often known as catastrophic fractures, may be divided into two types which depend...
Resource Type:: Masters Thesis
Full Text:: the Me chanical Enginee ring (Major) Master of Science in @ Date thesis is presented M Title

A micro study of the reduction of organic hydroxyl compounds with hydriodic acid

Creator:: Mitchell, Herschel K.
Resource Type:: Masters Thesis
Full Text:: author wisheB to express his sincere apprec- iation to Dr. Roger J. Williams for helpful advice and

Economic criteria as normative content in Oregon surface water law

Creator:: Whittaker, Gerald W.
Resource Type:: Masters Thesis
Full Text:: Roger G. Nraynick Economic analyses of the appropriation doctrine are generally based on the

Economic issues in assembling properties with eminent domain

Creator:: Hastie, James D.
Resource Type:: Masters Thesis
Full Text:: ACKNOWLEDGMENTS Foremost, I would like to thank Dr. Roger Kraynick for his patience and his support in the

The Daily barometer personal name index : A-M

Creator:: Oregon State University. Associated Students and Oregon State University. Student Media Committee
Abstract:: Subject index: Mar. 1896/Sept. 1980 in 1 v.; Personal name index: Mar. 1896/Sept. 1980 in 1 v.
Resource Type:: Technical Report
Full Text:: . 1, 1978, 11:1-2 -ACKLEY, WARD M. Ackley gets appointement. Oct. 1, 1920, 3:1 -ADAMS, O.D. Adams

Tropical Instability Waves as a Resonance between Equatorial Rossby Waves

Creator:: Lyman, John M., Chelton, Dudley B., deSzoeke, Roland A., and Samelso, Roger M.
Abstract:: To understand the characteristics of sea surface height signatures of tropical instability waves (TIWs), a linearized model of the central Pacific Ocean was developed in which the vertical structures of the state variables are projected onto a set of orthogonal baroclinic eigenvectors. In lieu of in situ current measurements with...
Resource Type:: Article
Full Text:: . CHELTON, ROLAND A. DESZOEKE, AND ROGER M. SAMELSON College of Oceanic and Atmospheric Sciences, Oregon

A token caching waiting-matching unit for tagged-token dataflow computers

Creator:: Traylor, Roger L.
Abstract:: Computers using the tagged-token dataflow model are among the best candidates for delivering extremely high levels of performance required in the future. Instruction scheduling in these computers is determined by associatively matching data-bearing tokens in a Waiting-Matching Unit (W-M unit). At the W-M unit, incoming tokens with matching contexts are...
Resource Type:: Masters Thesis
Full Text:: dataflow computers AN ABSTRACT OF THE THESIS OF Roger L. Traylor for the degree of Master of Science in

Randomness, Symmetry, and Scaling of Mesoscale Eddy Life Cycles

Creator:: Samelson, R. M., Schlax, M. G., and Chelton, D. B.
Abstract:: It is shown that the life cycles of nonlinear mesoscale eddies, a major component of low-frequency ocean physical variability, have a characteristic structure that differs fundamentally from that which would be expected on the basis of classical interpretations of ocean eddy evolution in terms of mean flow instability and equilibration...
Resource Type:: Article
Full Text:: Life Cycles Randomness, Symmetry, and Scaling of Mesoscale Eddy Life Cycles Samelson, R. M., M. G

Scale Evolution of Finite-Amplitude Instabilities on a Coastal Upwelling Front

Creator:: Durski, Scott M., Allen, J. S., Egbert, G. D., and Samelson, R. M.
Abstract:: Nonlinear model simulations of a coastal upwelling system show frontal instabilities that initiate at short alongshore scales but rapidly evolve to longer wavelengths. Several factors associated with the nonstationarity of this basic state contribute to the progression in scale. A portion of the system evolution is associated with the external...
Resource Type:: Article
Full Text:: Upwelling Front SCOTT M. DURSKI, J. S. ALLEN, G. D. EGBERT, AND R. M. SAMELSON College of Oceanic and

Wind tunnel simulation and field measurements of flow over a coastal headland

Creator:: Brownlow, Roger West
Abstract:: An experimental study was made of the average and turbulent wind characteristics of the flow over a model of a coastal headland. The scale of the model was 300:1, corresponding to a prototype size of 500 m. The data for validation of the model study was obtained from instruments mounted...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Roger West Brown low for the

Aflatoxin mutagenesis and metabolism and their dietary modification in rainbow trout (Salmo gairdneri)

Creator:: Coulombe, Roger A.
Abstract:: Aflatoxin B₁ (AFB₁) is a mold-produced toxin which has been shown to be a potent hepatocarcinogen in many animal species. Of the species studied thus far, rainbow trout have proven to be the most sensitive. Experiments were conducted to investigate various aspects of AFB₁ metabolism in this species, including in...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Roger A. Coulombe for the degree

A survey of linear programming algorithms

Creator:: Maurer, Roger J. (Roger Joseph), 1962-
Abstract:: Linear programming is a recent development in the field of Mathematics having its origin in the past seventy-five years. The purpose of this study was to identify several methods for solving linear programming problems. The algorithm for each of the methods is described in detail along with an analysis of...
Resource Type:: Masters Thesis
Full Text:: THE THESIS OF Roger J. Maurer for the degree of Master of Science in Mathematics presented on April

Deformation in the Peru Trench, 6⁰-10⁰S

Creator:: Prince, Roger Allan
Abstract:: Detailed surveys of several segments of the Peru Trench show that the region between 6° to 10⁰ S is an area of recent deformation. Seismic reflection records across the axis of the trench show faulting, uplift, and tilting of the sedimentary fill and the acoustic basement. Uplift of the acoustic...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Roger Allan Prince for the Master

Data report : major-element chemistry of Hole 896a glass

Creator:: Fisk, Martin R., McNeill, Andrew W., Teagle, Damon A. H., Furnes, Harald, and Bach, Wolfgang
Abstract:: Ocean Drilling Program Hole 896A (1°13.01'N, 83°43.39'W) is in 3440 m of water east of the Galapagos Platform in the equatorial eastern Pacific Ocean. At this site in 5.9 Ma crust, basement rocks were recovered over the depth range of 195.1 meters below seafloor (mbsf) to 469 mbsf. These rocks...
Resource Type:: Article
Full Text:: Ocean Drilling Program Hole 896A (ri3.01'N, 83°43.39'W) is in 3440 m of water east of the Galapagos

Life-history, growth and interference of cheatgrass (Bromus tectorum L.) and yellow starthistle (Centaurea solstitialis L.)

Creator:: Sheley, Roger Leslie
Abstract:: Cheatgrass (Bromus tectorum L.) and yellow starthistle (Centaurea soistitialis L.) have invaded over 3 million ha of grasslands in the western U.S. Future management will require an understanding of the conditions, mechanisms, and processes which control species dominance, community dynamics, and desirable plant establishment in these alien dominated annual rangelands....
Resource Type:: Dissertation

Economic feasibility of mechanical strawberry harvesting in Oregon : estimated private and social benefits and costs

Creator:: Hussen, Ahmed M.
Abstract:: At its peak, Oregon produced 21 percent of the nation's total commercial strawberry production. However, since 1971, Oregon's share of strawberry production has been declining steadily. In fact, for the last three years strawberry production in Oregon constitutes only 8 percent of the nation's total production, which is the lowest...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF AHMED M. HUSSEN for the degree of

Mesoscale Simulation of Supercritical, Subcritical, and Transcritical Flow along Coastal Topography

Creator:: Burk, Stephen D., Haack, Tracy, and Samelson, R. M.
Abstract:: A mesoscale atmospheric model is used to address the characteristics of stratified flow bounded by a side wall along a varying coastline. Initial Froude number values are varied through alteration of marine inversion strength, permitting examination of supercritical, subcritical, and transcritical flow regimes encountering several coastal configurations. Consistent with shallow...
Resource Type:: Article
Full Text:: Research Laboratory, Monterey, California R. M. SAMELSON College of Oceanic and Atmospheric Sciences

The Evolution and Propagation of Quasigeostrophic Ocean Eddies

Creator:: Early, Jeffrey J., Samelson, R. M., and Chelton, Dudley B.
Abstract:: The long-term evolution of initially Gaussian eddies is studied in a reduced-gravity shallow-water model using both linear and nonlinear quasigeostrophic theory in an attempt to understand westward-propagating mesoscale eddies observed and tracked by satellite altimetry. By examining both isolated eddies and a large basin seeded with eddies with statistical characteristics...
Resource Type:: Article
Full Text:: Quasigeostrophic Ocean Eddies* JEFFREY J. EARLY, R. M. SAMELSON, AND DUDLEY B. CHELTON College of Oceanic and

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