Index Catalog // ScholarsArchive@OSU

Tsunami-induced Soil Instability

Creator:: Fischer, Rachael Marie
Abstract:: Recent tsunami field surveys from the 2011 Great East Japan Earthquake and Tsunami have recorded numerous examples of tsunami-induced soil instability: significant scour around foundations, foundation failure of piles, and other damage caused by liquefaction. From the observations of soil instability leading to the failure of critical coastal structures, it...
Resource Type:: Masters Thesis
Full Text:: Instability Abstract approved: H. Benjamin Mason Recent tsunami field surveys from the 2011 Great East

Rip current instabilities

Creator:: Haller, Merrick C. and Dalrymple, Robert A.
Abstract:: A laboratory experiment involving rip currents generated on a barred beach with periodic rip channels indicates that rip currents contain energetic low-frequency oscillations in the presence of steady wave forcing. An analytic model for the time-averaged flow in a rip current is presented and its linear stability characteristics are investigated...
Resource Type:: Article
Full Text:: instabil- ity mechanism. The instability model considers spatially growing disturbances in an offshore

Instabilities in InP MIS capacitors

Creator:: Juang, Min Tzuan
Abstract:: The drain current of InP MISPETs is often observed to decrease as a function of time after the application of a positive gate bias which involves an accumulation of electrons in the channel. Various models have been proposed for this drain current drift (DCD) phenomenon. In this thesis, variable-temperature bias-stress...
Resource Type:: Masters Thesis
Full Text:: 2 have been somewhat disappointing. Two major problems remain to be solved: (1) The instability of

Nucleosome instabilities in physiological salt

Creator:: Yager, Thomas D.
Abstract:: Best scan available for figures. Some figures are high gloss photos, others are black and white photocopies.
Resource Type:: Dissertation
Full Text:: instability. The second is that of defining a complete set of elementary dynamic, or mechanistic processes

Evolution and mixing of asymmetric Holmboe instabilities

Creator:: Carpenter, J. R., Lawrence, G. A., and Smyth, William D.
Abstract:: When a stably stratified density interface is embedded in a region of strong velocity shear, hydrodynamic instabilities result. Here we generalize the stratified shear layer to allow an offset between the centre of the shear layer and the density interface. By including this asymmetry, and keeping the density interface thin...
Resource Type:: Article
Full Text:: thin with respect to the shear layer, the asymmetric Holmboe (AH) instability emerges. This study

Ocean Mixing by Kelvin-Helmholtz Instability

Creator:: Smyth, William D. and Moum, James N.
Abstract:: Kelvin-Helmholtz (KH) instability, characterized by the distinctive finite-amplitude billows it generates, is an important mechanism in the development of turbulence in the stratified interior of the ocean. In particular, it is often assumed that the onset of turbulence in internal waves begins in this way. Clear recognition of the importance...
Resource Type:: Article
Full Text:: | Vol. 25, No. 2140 Ocean Mixing by Kelvin-Helmholtz Instability B y W I l l I a M D . S M y t H

A study of cavitation instabilities in solids

Creator:: Puttapitukporn, Tumrong
Abstract:: Cavitation instabilities in elastic-plastic solids under spherically-symmetric and axisymmetric loadings were investigated using the finite element method. Both quasi-static and dynamic analyses were used to solve these problems. In the quasi-static analyses, we investigated a cavitation instability in elastic/perfectly-plastic, linear hardening elastic-plastic, power hardening elasticplastic, and constrained silver materials. Here,...
Resource Type:: Dissertation
Full Text:: quasi-static analyses, we investigated a cavitation instability in elastic/perfectly-plastic, linear

Cloud-Top Entrainment Instability Observed in AMTEX

Creator:: Mahrt, L. and Paumier, J.
Abstract:: Aircraft data collected at the top of a cloud-topped mixed layer during the Air Mass Transformation Experiment are analyzed. Entrainment instability due to evaporation of liquid water is found to occur intermittently. This instability and upward heat flux occur frequently at the downstream edge of cloudy mixed-layer motions which have...
Resource Type:: Article

Linear theory of roll instabilities in the ocean surface layer

Creator:: Duncombe, Jenessa R.
Abstract:: This thesis describes the results of a linear stability analysis conducted on a simulated wind-forced ocean front. The ocean surface boundary layer regulates exchanges between the ocean and atmosphere, and the presence of turbulence in the surface layer can greatly impact climate and ocean life. Past research has shown that...
Resource Type:: Masters Thesis
Full Text:: boundary layer, but the underlying instability mechanisms are not well understood. In this thesis I

Short-wavelength instabilities on coastal jets and fronts

Creator:: Barth, John A.
Abstract:: The stability of a coastal jet and front is investigated using the primitive equations applied to a continuously stratified flow in geostrophic balance. A linear stability analysis successfully explains the growth of two modes of instability with distinctly different horizontal scales. A long-wavelength mode (fastest-growing wavelength of 0(100 km)) is...
Resource Type:: Article
Full Text:: linear stability analysis successfully explains the growth of two modes of instability with distinctly

Instability of Mapper Type Algorithms for Topological Data Analysis

Creator:: Wentland, Danial
Abstract:: Mapper is a tool designed by Gurjeet Singh, Facundo Mémoli, and Gunnar Carlsson for Topological Data Analysis (TDA) that constructs a simplicial complex from a finite subset of a metric space, which has been met with great success. Due to the many moving parts of Mapper and the potential it...
Resource Type:: Capstone Project
Full Text:: Instability of Mapper Type Algorithms for Topological Data

Secondary Kelvin-Helmholtz instability in weakly stratified shear flow

Creator:: Smyth, William D.
Abstract:: The growth of secondary vortices on the braids separating Kelvin–Helmholtz billows is investigated via numerical simulations. The similarity theory of Corcos & Sherman (1976) is extended to include mixing processes with Prandtl number greater than unity, and is shown to provide a useful description of the physics of the braid...
Resource Type:: Article
Full Text:: Secondary Kelvin–Helmholtz instability in weakly

Corrugation Instabilities Across Shock Fronts in Magnetohydrodynamical Astrophysical Systems

Creator:: Mullins, Austin Charles
Abstract:: Slow magnetosonic shock fronts are unstable to changes made to their shape, a phenomenon known as corrugation instability. The computational models studied considers a system where plasma travels across a shock front. Using the code Linogen, the corrugation instability of a shock front can be theoretically modeled. The results show...
Resource Type:: Honors College Thesis
Full Text:: shape, a phenomenon known as corrugation instability. The computational models studied considers a

On Symmetric Instabilities in Oceanic Bottom Boundary Layers

Creator:: Allen, J. S. and Newberger, P. A.
Abstract:: Model studies of two-dimensional, time-dependent, wind-forced, stratified downwelling circulation on the continental shelf have shown that the near-bottom offshore flow can develop time- and space-dependent fluctuations involving spatially periodic separation and reattachment of the bottom boundary layer and accompanying recirculation cells. Based primarily on the observation that the potential vorticity...
Resource Type:: Article
Full Text:: as finite amplitude slantwise convection resulting from a symmetric instability. To further support

Shear instabilities of the mean longshore current : 1. theory

Creator:: Bowen, A. J. and Holman, Robert A.
Abstract:: A new class of nearshore waves based on the shear instability of a steady longshore current is discussed. The dynamics depend on the conservation of potential vorticity but with the background vorticity field, traditionally the role of Coriolis in larger scale flows, supplied by the shear structure of the longshore...
Resource Type:: Article
Full Text:: , Corvallis A new class of nearshore waves based on the shear instability of a steady longshore current is

Satellite Microwave SST Observations of Transequatorial Tropical Instability Waves

Creator:: Chelton, Dudley B., Wentz, Frank J., Genremann, Chelle L., de Szoeke, Roland A., and Schlax, Michael G.
Abstract:: Satellite measurements of sea-surface temperature (SST) by the TRMM Microwave Imager reveal previously unreported features of tropical instability waves (TIWs). In the Pacific, TIW-related variability is observed from the eastern boundary to at least 160°E. Cusp-shaped distortions of SST fronts and associated trains of anticyclonic vortices both north and south...
Resource Type:: Article
Full Text:: Tropical Instability Waves GEOPHYSICAL RESEARCH LETTERS, VOL. 27, NO. 9, PAGES 1239-1242, MAY 1, 2000

Instabilities of a Baroclinic, Double Diffusive Frontal Zone

Creator:: Smyth, W. D.
Abstract:: The linear theory of double diffusive interleaving is extended to take account of baroclinic effects. This study goes beyond previous studies by including the possibility of modes with nonzero tilt in the alongfront direction, which allows for advection by the baroclinic frontal flow. This requires that the stability equations be...
Resource Type:: Article
Full Text:: which this property was assumed. Besides this, there exist two additional modes of instability: the

Nonlinear shear instabilities of alongshore currents over barred beaches

Creator:: Slinn, Donald N., Allen, J. S., Newberger, P. A., and Holman, Robert A.
Abstract:: The nonlinear dynamics of finite amplitude shear instabilities of alongshore currents in the nearshore surf zone over barred beach topography are studied using numerical experiments. These experiments extend the recent study of Allen et al. [1996], which utilized plane beach (constant slope) topography by including shore-parallel sandbars. The model involves...
Resource Type:: Article

Baroclinic Interleaving Instability: A Second-Moment Closure Approach

Creator:: Smyth, W. D., Burchard, H., and Umlauf, L.
Abstract:: Interleaving motions on a wide, baroclinic front are modeled using a second-moment closure to represent unresolved fluxes by turbulence and salt fingering. A linear perturbation analysis reveals two broad classes of unstable modes. First are scale-selective modes comparable with interleaving as observed in oceanic fronts. These correspond well with observations...
Resource Type:: Article
Full Text:: jpoD11066 764..784 Baroclinic Interleaving Instability: A Second

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:: Tropical Instability Waves as a Resonance between Equatorial

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:: I P E R M A N q 2001 American Meteorological Society Instability of the Chaotic ENSO: The Growth

Modulation of equatorial turbulence by a tropical instability wave

Creator:: Inoue, R., Lien, R. -C., and Moum, J. N.
Abstract:: Strong modulation of turbulent mixing by a westward-propagating tropical instability wave (TIW) was observed in the stratified shear layer between the equatorial undercurrent (EUC) and the surface mixed layer during October and November 2008 at 0°N 140°W. The unique deep diurnal-cycle mixing in the stratified layer beneath the equatorial cold...
Resource Type:: Article
Full Text:: tropical instability wave Modulation of equatorial turbulence by a tropical instability wave R. Inoue,1

Understanding the post-kiln warp instability of lumber

Creator:: Stanish, Mark, Western Dry Kiln Association, and Western Dry Kiln Association. Meeting (50th : 1999 : Portland, Or.)
Resource Type:: Conference Proceeding
Full Text:: UNDERSTANDING THE POST-KILN WARP INSTABILITY OF LUMBER Mark

Instability and hydraulics of turbulent stratified shear flows

Creator:: Liu, Zhiyu, Thorpe, S. A., and Smyth, W. D.
Abstract:: The Taylor–Goldstein (T–G) equation is extended to include the effects of small-scale turbulence represented by non-uniform vertical and horizontal eddy viscosity and diffusion coefficients. The vertical coefficients of viscosity and diffusion, A[subscript V] and K[subscript V], respectively, are assumed to be equal and are expressed in terms of the buoyancy...
Resource Type:: Article
Full Text:: © Cambridge University Press 2012 235 doi:10.1017/jfm.2012.13 Instability and hydraulics of turbulent

Normal-Mode Instabilities of a Time-Dependent Coastal Upwelling Jet

Creator:: Durski, S. M., Samelson, R. M., and Allen, J. S.
Abstract:: The linear stability of a nearly time-periodic, nonlinear, coastal upwelling–downwelling circulation, over alongshore-uniform topography, driven by a time-periodic wind stress is investigated using numerical methods. The near-periodic alongshore-uniform basic flow is obtained by forcing a primitive equation numerical model of coastal ocean circulation with periodic wind stress. Disturbance growth on...
Resource Type:: Article
Full Text:: flows may be unstable (e.g., Barth 1989; Walstad et al. 1991). These instability processes represent a

Instability and temperature-dependence assessment of IGZO TFTs

Creator:: Hoshino, Ken
Abstract:: Amorphous oxide semiconductors (AOSs) are of great current interest for thin-film transistor (TFT) channel layer applications. In particular, indium gallium zinc oxide (IGZO) is under intense development for commercial applications because of its demonstrated high performance at low processing temperatures. The objective of the research presented in this thesis is...
Resource Type:: Masters Thesis
Full Text:: Rights Reserved Instability and Temperature-Dependence Assessment of IGZO TFTs by Ken Hoshino

Laurentide ice-sheet instability during the last deglaciation

Creator:: Ullman, David J., Carlson, Anders E., Anslow, Faron S., LeGrande, Allegra N., and Licciardi, Joseph M.
Abstract:: Changes in the amount of summer incoming solar radiation (insolation) reaching the Northern Hemisphere are the underlying pacemaker of glacial cycles. However, not all rises in boreal summer insolation over the past 800,000 years resulted in deglaciation to present-day ice volumes, suggesting that there may be a climatic threshold for...
Resource Type:: Article

"Because we didn't have nowhere to go" : residential instability among rural low-income families

Creator:: Ozretich, Robin Nathaniel
Abstract:: The purpose of this study was to identify and examine risk and protective factors associated with residential instability within a sample of rural low-income mothers. Residential instability was defined as two or more residential moves within the course of a year. Qualitative and quantitative methods were used to compare residentially...
Resource Type:: Masters Thesis
Full Text:: : "Because We Didn't Have Nowhere To Go": Residential Instability Among Rural Low-Income Families. Abstract

Performance in static, dynamic, and clinical tests of postural control in individuals with functional ankle instability

Creator:: Nakagawa, Lyn H.
Abstract:: Objectives: To evaluate postural control in individuals with functional ankle instability using static, dynamic, and clinical balance tests. Also, to examine the relationships between the performances in each of these tests. Design: Postural control was evaluated with a single leg balance test, a balance test involving movement, and the star...
Resource Type:: Masters Thesis
Full Text:: , Dynamic, and Clinical Tests of Postural Control in Individuals with Functional Ankle Instability Abstract

Narrowband Oscillations in the Upper Equatorial Ocean. Part II: Properties of Shear Instabilities

Creator:: Smyth, W. D., Moum, J. N., and Nash, J. D.
Abstract:: Narrowband oscillations observed in the upper equatorial Pacific are interpreted in terms of a random ensemble of shear instability events. Linear perturbation analysis is applied to hourly averaged profiles of velocity and density over a 54-day interval, yielding a total of 337 unstable modes. Composite profiles of mean states and...
Resource Type:: Article
Full Text:: equatorial Pacific are interpreted in terms of a random ensemble of shear instability events. Linear

Effects of wave-current interaction on shear instabilities of longshore currents

Creator:: Özkan-Haller, H. Tuba and Li, Ye
Abstract:: We examine the effects of wave-current interaction on the dynamics of instabilities of the surf zone longshore current. We utilize coupled models for the simulation of the incident waves and the wave-induced nearshore circulation. The coupling between the models occurs through radiation stress gradient terms (accounting for the generation of...
Resource Type:: Article
Full Text:: . For more energetic shear instability fields that occur when frictional damping is small, this feedback

Dynamic instability of stratified shear flow in the upper equatorial Pacific

Creator:: Sun, Chaojiao, Smyth, William D., and Moum, James N.
Abstract:: The role of stratified shear instability in maintaining the deep cycle of turbulence immediately below the equatorial mixed layer is examined by means of linear stability analysis. The Taylor-Goldstein equation is solved numerically, using observed currents and stratification from the Tropical Instability Wave Experiment (TIWE). Multiple unstable modes are found,...
Resource Type:: Article
Full Text:: Dynamic instability of stratified shear flow in the upper

Initiation of Genome Instability and Preneoplastic Processes through Loss of Fhit Expression

Creator:: Saldivar, Joshua C., Miuma, Satoshi, Bene, Jessica, Hosseini, Seyed Ali, Shibata, Hidetaka, Sun, Jin, Wheeler, Linda J., Mathews, Christopher K., and Huebner, Kay
Abstract:: Genomic instability drives tumorigenesis, but how it is initiated in sporadic neoplasias is unknown. In early preneoplasias, alterations at chromosome fragile sites arise due to DNA replication stress. A frequent, perhaps earliest, genetic alteration in preneoplasias is deletion within the fragile FRA3B/FHIT locus, leading to loss of Fhit protein expression....
Resource Type:: Article
Full Text:: pgen.1003077 1..16 Initiation of Genome Instability and

Causes of genome instability: the effect of low dose chemical exposures in modern society

Creator:: Langie, Sabine A. S., Koppen, Gudrun, Desaulniers, Daniel, Al-Mulla, Fahd, Al-Temaimi, Rabeah, Amedei, Amedeo, Azqueta, Amaya, Bisson, William H., Brown, Dustin, Brunborg, Gunnar, Charles, Amelia K., Chen, Tao, Colacci, Annamaria, Darroudi, Firouz, Forte, Stefano, Gonzalez, Laetitia, Hamid, Roslida A., Knudsen, Lisbeth E., Leyns, Luc, Lopez de Cerain Salsamendi, Adela, Memeo, Lorenzo, Mondello, Chiara, Mothersill, Carmel, Olsen, Ann-Karin, Pavanello, Sofia, Raju, Jayadev, Rojas, Emilio, Roy, Rabindra, Ryan, Elizabeth, Ostrosky-Wegman, Patricia, Salem, Hosni K., Scovassi, A. Ivana, Singh, Neetu, Vaccari, Monica, Van Schooten, Frederik J., Valverde, Mahara, Woodrick, Jordan, Zhang, Luoping, van Larebeke, Nik, Kirsch-Volders, Micheline, and Collins, Andrew R.
Abstract:: Genome instability is a prerequisite for the development of cancer. It occurs when genome maintenance systems fail to safeguard the genome’s integrity, whether as a consequence of inherited defects or induced via exposure to environmental agents (chemicals, biological agents and radiation). Thus, genome instability can be defined as an enhanced...
Resource Type:: Article
Full Text:: of genome instability: the effect of low dose chemical exposures in modern society Causes of

Finite-Amplitude Evolution of Instabilities Associated with the Coastal Upwelling Front

Creator:: Durski, Scott M. and Allen, J. S.
Abstract:: A primitive equation model is used to study the finite-amplitude evolution of instabilities associated with the coastal upwelling front. Simulations of increasing complexity are examined that represent idealizations of summer conditions off the Oregon coast, including cases with steady and with time-variable wind in a domain with alongshore-uniform bathymetry and...
Resource Type:: Article
Full Text:: instability processes, bathym- etry, coastline curvature, and spatial variation in the wind field. The effects

A Nonlinear Baroclinic Wave-Mean Oscillation with Multiple Normal Mode Instabilities

Creator:: Samelson, R. M. and Wolfe, C. L.
Abstract:: An unstable, nonlinear baroclinic wave-mean oscillation is found in a strongly supercritical quasigeostrophic f-plane numerical channel model with 3840 Fourier components. The growth of linear disturbances to this time-periodic oscillation is analyzed by computing time-dependent normal modes (Floquet vectors). Two different Newton–Picard methods are used to compute the unstable solution,...
Resource Type:: Article
Full Text:: oscillation. The results provide an example of time-dependent normal mode instability of a strongly nonlinear

Instability and Diapycnal Momentum Transport in a Double-Diffusive, Stratified Shear Layer

Creator:: Smyth, William D. and Kimura, Satoshi
Abstract:: The linear stability of a double-diffusively stratified, inflectional shear flow is investigated. Double-diffusive stratification has little effect on shear instability except when the density ratio R[subscript]ρ is close to unity. Double-diffusive instabilities have significant growth rates and can represent the fastest-growing mode even in the presence of inflectionally unstable shear...
Resource Type:: Article
Full Text:: Instability and Diapycnal Momentum Transport in a Double

Narrowband Oscillations in the Upper Equatorial Ocean. Part I: Interpretation as Shear Instabilities

Creator:: Moum, J. N., Nash, J. D., and Smyth, W. D.
Abstract:: Extended measurements of temperature fluctuations that include the turbulence wavenumber band have now been made using rapidly sampled fast thermistors at multiple depths above the core of the Equatorial Undercurrent on the Tropical Atmosphere Ocean (TAO) mooring at 0°, 140°W. These measurements include the signature of narrowband oscillations as well...
Resource Type:: Article
Full Text:: Heat), 1987 (Tropic Heat 2), 1991 [Tropical Instability Wave Experiment (TIWE)], and autumn 2008. From

Predicting mechanical instability of a cylindrical plate under axial flow conditions

Creator:: Marcum, Wade R.
Abstract:: Five U.S. high performance research reactors (HPRRs) are currently part of an international nonproliferation program with the objective of ultimately converting their highly enriched uranium (HEU) fuel to a new high density, low enriched uranium (LEU) fuel while still maintaining their reactor kinetic and thermal hydraulic performance. A uranium-molybdenum (U-Mo)...
Resource Type:: Dissertation
Full Text:: December 3, 2010. Title: Predicting Mechanical Instability of a Cylindrical Plate under Axial Flow

Marginal instability and deep cycle turbulence in the eastern equatorial Pacific Ocean

Creator:: Smyth, W. D. and Moum, J. N.
Abstract:: Deep cycle mixing in the cold tongue of the equatorial Pacific Ocean is associated with a mean flow regime in which the gradient Richardson number Ri (a ratio of stratification to shear that affects the evolution of turbulence) fluctuates about a critical value near 1/4. This is the state of...
Resource Type:: Article

Hysteresis and Dissipation Coefficient in Recreational Athletes with Chronic Ankle Instability Compared to Controls

Creator:: Joiner, Trenton
Abstract:: Ligaments serve to control the movements of bones and joints within the body. Viscoelastic properties, such as hysteresis, allow them to perform their functions; however, these properties may change following injury. Understanding alterations in viscoelastic properties may be useful in diagnosing, tracking, and determining treatment effectiveness in Chronic Ankle Instability...
Resource Type:: Honors College Thesis
Full Text:: Athletes with Chronic Ankle Instability Compared to Controls by Trenton Joiner

Revitalization or Gentrification?: An Examination of Urban Renewal Areas and Housing Instability in Oregon

Creator:: Perreault, Matthew
Abstract:: Housing affordability is a salient topic among policymakers and the general public today, especially in Oregon. As housing costs continue to rise, there are concerns that urban planning policies such as urban renewal via tax-increment financing (TIF) are exacerbating the problem and pushing more households into a state of housing...
Resource Type:: Capstone Project
Full Text:: Gentrification?: An Examination of Urban Renewal Areas and Housing Instability in Oregon. Abstract

Numerical simulations of nonlinear baroclinic instability with a spherical wave-mean flow model

Creator:: Wang, Chunzai
Abstract:: A global, multi-level, wave-mean flow model based on an approximate version of the primitive equations is developed to investigate the development of a baroclinic wave field initially confined to a single zonal wavenumber. The effects of physical processes (surface drag and thermal damping) and internal diffusion on the evolution have...
Resource Type:: Masters Thesis
Full Text:: Nonlinear Baroclinic Instability with a Spherical Wave-Mean Flow Model Abstract Approved: V Jeffrey R

The leading edge of a tropical instability wave : interpretation as a gravity current

Creator:: McHugh, Elizabeth Helen
Abstract:: A sharp temperature front, oriented along the south-west corner of the leading edge of a Tropical Instability Wave (TIW) warm trough, was encountered at 0°N, 140°W on November 2, 2008 and detected by a 0.45°C increase in SST that occurred over 7 s. The distinct SST signal was observed at...
Resource Type:: Masters Thesis
Full Text:: Atmospheric Sciences presented on September 30, 2013 Title: The Leading Edge of a Tropical Instability Wave

The linear and non-linear baroclinic instability in the eastern North Pacific

Creator:: Lee, Dong-kyu
Abstract:: Using a linear quasi-geostrophic model of large scale spiraling flow and vertical density gradient in the eastern North Pacific, we evaluate the complex dispersion relationships for quasi-geostrophic waves. Our calculations indicate that the geostrophic circulation of the eastern North Pacific can locally convert potential energy to mesoscale kinetic energy on...
Resource Type:: Dissertation
Full Text:: , 1987 .linic Instability in the Eastern North Pacific Using a linear quasi-geostrophic model of large

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:: fastest-growing scale of disturbance is a shallow, narrow frontal instability of approximately 11.4-km

Evaluation of outcomes following thermal, open and arthroscopic glenohumeral capsulorrhaphy for recurrent anterior instability

Creator:: Sullivan, Jeff A.
Abstract:: PURPOSE: To compare glenohumeral joint position sense (JPS), concentric internal (IR) and external rotation (ER) strength, functional ability, and level of satisfaction in patients who underwent three types of glenohumeral capsulorrhaphy with age-matched controls. RESEARCH DESIGN: Four 4x2 and two 4x3 ANOVAs were used to identify differences in JPS and...
Resource Type:: Dissertation
Full Text:: , Open, and Arthroscopic Glenohumeral Capsulorrhaphy for Recurrent Anterior Instability. Abstract

Impact of tropical instability waves on nutrient and chlorophyll distributions in the equatorial Pacific

Creator:: Evans, William Wiley
Abstract:: Tropical instability waves (TIWs) are prominent seasonal features in both the equatorial Pacific and Atlantic Oceans. This work quantifies their role in modulating the distributions of nutrients and phytoplankton biomass. Using an eight year record of biannual ship observations along the Tropical Atmosphere Ocean (TAO) buoy array, cruise sections crossing...
Resource Type:: Masters Thesis
Full Text:: . Title: Impact of Tropical Instability Waves on Nutrient and Chlorophyll Distributions in the

Clay mineralogy in relation to landscape instability in the coast range of Oregon

Creator:: Istok, J. D.
Abstract:: The mineralogy of soils involved in mass movement in Oregon's coast range was examined to determine relationships between clay mineralogy and landscape instability. The objectives were: 1) to determine what kind of materials constitute the less than 2μ fraction of soils involved in different categories of mass movement, and 2)...
Resource Type:: Masters Thesis
Full Text:: Clay mineralogy in relation to landscape instability in the

Growth, diversification, and cyclical instability in the Oregon economy, 1960-1979

Creator:: Oregon State University. Agricultural Experiment Station, Smith, Gary W., and Weber, Bruce A.
Abstract:: Published May 1984. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: Growth, Diversification, and Cyclical Instability in the Oregon

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