As laws regarding medical and recreational cannabis use are changing across the United States, one must begin to understand the effects among individuals with chronic pain. Specifically, it is unclear how legalization may change their use of marijuana and opioids to self-medicate or for recreational use. To address these questions,...
We radiocollared a sample of 61 red tree voles in Douglas County, Oregon and
monitored their movements to determine daily, seasonal, and sexual differences in
behavior and home range attributes. We also collected information on nest attributes,
survival, and dispersal of the radiocollared voles. Individual voles were monitored for
periods...
Market lamb production usually requires a short period of time. The success of production is therefore dependent upon the growth rate of the lambs which is influenced by milk yields of the ewes. Different growth potentials of animals result from a difference in their utilisation of food. Since metabolism affects...
Published 1915. 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
Published 1915. 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
Published 1915. 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
From May through November 1963, a mosquito survey was
made in the city of Corvallis, Oregon. The information
obtained dealt with the species of mosquitoes found,
their seasonal occurrence and the location and nature of
their larval habitats. A quantitative and qualitative
analysis of larval and adult mosquito collections by...
Crossmatings were accomplished among three semi-closed lines within a population of pigs, for the purpose of investigating effects of crossbreeding on reproductive traits. Two of the lines were purebred (Berkshire and Yorkshire); the third line ("Composite") consisted of descendants from inter se matings among offspring of crosses of the Berkshire...
Five breeds of sheep (Columbia, Targhee, Rambouillet, Lincoln,
and Suffolk) were found to possess two hemoglobin types (Hb. A
and Hb. B) when their hemoglobins were examined by disc gel electrophoresis.
The hemoglobin alleles proved to be co-dominant.
Three of the breeds (Columbia, Targhee, and Rambouillet)
were maintained at altitudes...
The investigations were based on a complete diallel cross
among three inbred lines of Hereford cattle. Records of Angus calves
born during the same period were used to obtain more accurate
estimates of environmental effects and to determine breed differences
among the various traits included in the study. Estimates of...
This thesis contains three parts addressing the asymptotic analysis of fluid flow through fully saturated porous medium in the presence of an adjacent thin channel.
In the first part the problem is modeled by Darcy's law in both the porous medium and in the channel. The permeability in the channel...
Published 1915. 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
Published 1915. 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
Published 1915. 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
Published 1915. 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
Published May 1967. 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
In the administration of its quota management system (QMS), New Zealand sets a “deemed value” fee that must be paid for any landings in excess of annual catch entitlements (ACE.) The deemed value system is an example of a price-capped cap-and-trade system (Roberts and Spence 1976). This paper argues that...
This study involved the use of the two-choice preference test to determine the taste reactions of buck and doe Columbian black-tailed deer (Odocoileus hemionus columbianus) to ascending concentrations of water extracts of Douglas fir, red alder, cascara, western hemlock and bitterbrush; to an ethanol extract of Douglas fir, and to...
Our objectives were to determine 1) the concentration of prostaglandin
F2α (PGF2α) in whole and extended bovine semen, 2) if concentrations of
prostaglandins in extended bovine semen are correlated to fertility, and 3) if PGF2α
administered at the time of artificial insemination would improve conception rate.
Concentration of PGF2α tended...
Strong self-regulation skills can predict academic success in early childhood contexts, specifically for math and literacy skills, thus laying the foundation for future success (McClelland & Cameron, 2012; McClelland & Ponitz, 2011). Children’s exposure to increased instructional time in school through programs such as full day kindergarten (FDK) has also...
The bulk of resilience research has focused on developmental outcomes in a single domain of functioning (e.g., academic achievement), overlooking the complex interplay of positive and negative developmental outcomes that may co-occur within an individual (Luthar, Cicchetti, & Becker, 2000). Resilience may strengthen over time and across domains (e.g., psychological...
Behavioral self-regulation has emerged as an important predictor of academic success as early as preschool. Few studies, however, have examined ways to improve children's behavioral self-regulation in preschool, prior to formal school entry. This dissertation includes two studies examining a pilot intervention using classroom games to improve behavioral self-regulation with...
About one-quarter of the U.S. adult population lives with a disability, yet ableist presentations of disability as a tragedy in need of a cure (i.e., the medical model) continue to predominate, even in higher education. Previous, qualitative research showed that people with disabilities (PWDs) desire changes in individual and societal...
Many female undergraduate students engage in disordered eating, an umbrella term for sub clinical behaviors such as food restriction, binge eating, over exercising, and general preoccupation with food, weight, and body. Depending on the type of behavior and the length of time engaged with the behavior, disordered eating behaviors can...
The purpose of this dissertation was to contribute to the current understanding about identity development in young adults who experience psychosis and schizophrenia. The article in Chapter 2 Using Authentic Identity Theories to Address the Stigmatization of Young People Who Experience Psychosis and Schizophrenia examined the literature on identity development...
The temperature-dependent development of pupae and adults of strawberry root weevil (SRW) Otiorhynchus ovatus (L.) was studied in strawberry (Fragaria x ananassa Duch. var. 'Totem'). The development of pupae and adults was investigated at constant temperatures from 3-33°C at 3°C intervals. Major emphasis was on the development of a weighted...
Published May 1966. 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
The effects of fenamiphos on soil and root populations of Pratylenchus penetrans were evaluated in four red raspberry cv. Willamette fields in Northwestern Oregon. Field 1 was a silty clay loam with 53% organic matter (OM). Field 2 and 3 were silty loam soils with 3.25 and 2.55% OM, respectively...
An experimental study was performed in which an ammonia-water solution was desorbed within a branching fractal-like microchannel array. The solution entered in the center of a disk, and flowed out radially until discharging in to a gravity-driven separation chamber. Heat was added to the ammonia-water through a thin wall, above...
In this paper we develop an upscaling technique for non-Darcy flow in porous media. Non-Darcy model of flow applies to flow in porous media when large velocities occur. The well-posedness results for theory of quasilinear elliptic partial differential equations. To discretize the model we used lowest order Raviart-Thomas mixed finite...
The intergenerational transmission of school adjustment was explored in a sample of 213 children and their fathers. The fathers were participants in a longitudinal study that began when they were in the fourth grade, and their children have been assessed at the ages of 21 months and 3, 5, and...
Published June 1937. 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
In this dissertation, we use Fourier-analytic and spectral theory methods to analyze the behavior of solutions of the incompressible Navier-Stokes equations in 2D and 3D (with an eye towards better understanding turbulence). In particular, we investigate the possible existence of so-called ghost solutions to the Navier-Stokes Equations. Such solutions, if...
In this thesis we study mathematical and computational models for phenomena of flow and transport in porous media in the presence of changing pore scale geometries. The differential equations for the flow and transport models at Darcy scale involve the coefficients of permeability, porosity, and tortuosity which depend on the...
Computer decision aids can help integrate and apply diverse sources of information and expertise to problems of integrated pest management (IPM) in agriculture and forestry. AppleMgr combines a rule-based expert system with databases and spreadsheets in a prototype decision aid intended to be expanded and modified for use by extension...
Apoplastic distribution patterns of atrazine [2-chloro-4-(ethylamino)-
6-(isopropylamino)-s-triazine], glyphosate [N-(phosphonomethyl)-
glycine], the naturally occurring apoplastic leaf solutes, and
the apoplastic dye PTS (trisodium 3-hydroxy-5,8,10-pyrenetrisulfonate)
were compared. Aliquots of sap were expressed from intact
sunflower leaves in a pressure chamber over intervals of 0.2 to 0.4
bars. Three distinct fractions were detected...
This dissertation explores mathematical theory of the 3 dimensional incompressible Navier-Stokes equations that consists a set of partial differential equations which govern the motion of Newtonian fluids and can be seen as Newton's second law of motion for fluids. The main interest of this work focuses on how local perturbation...
During 2 seasons effects of high and low irrigation (water applied
at -0.6 and -2.5 bars soil water potential, respectively) and
density were evaluated on yield parameters and flower/pod development
at mainstem nodes 2 and 6 (terminal) of 'Oregon 1604', a determinate
snap bean. High and low plant densities were...
Fluid-structure interaction (FSI) is a very interesting and challenging multi-disciplinary field involving interaction of a movable or deformable structure with an internal or surrounding fluid flow. FSI has several practical engineering applications such as the determination of the hydrodynamic forces on a structure or the dynamics of motion of bodies...
OBJECTIVE: The associations substance use has with sex and condom use among college students appear to be well-documented and of clear public health significance. However, few event-level studies examine marijuana or heavy alcohol use, control for temporal patterns shared among these behaviors, or consider differences by relationship status. METHOD: We...
The interplay of natural selection and genetic drift, influenced by geographic isolation, mating systems and population size, determines patterns of genetic diversity within species. The sperm whale provides an interesting example of a long-lived species with few geographic barriers to dispersal. Worldwide mtDNA diversity is relatively low, but highly structured...
Full Text:
,*† KENDRA HOEKZEMA,† SARAH L. MESNICK,§
DANIEL ENGELHAUPT,¶ IAIN KERR,** ROGER PAYNE** and C. SCOTT BAKER
Published May 1929. 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
Published December 1934. 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
Published June 1931. 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
Recently reforested sites revegetate quickly after timber harvesting.
Competition for essential growth elements—sunlight, moisture, and
nutrients—often depresses the vigor and survival of the desired
crop trees. Competition comes from grasses, broadleaf weeds called forbs,
shrubs, or less valuable tree species.
The arid soils of Oregon tend to be deficient in organic
matter and nitrogen. This deficiency has a marked effect on
the duty of water and the productiveness of such soils. Silt
barns, volcanic ash, and fine sandy barns are not so greatly
in need of this organic matter and...
Successful reforestation of your harvested timberland is more than just
planting a few trees and hoping they will grow. To ensure success,
you first must answer several key questions:
• What species should I plant?
• What kind of seedlings should I select?
• How can I tell whether their...
Published March 1917. 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
Published November 1904. 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
Western hemlock forests in the coastal areas of Oregon are some of the most productive and diverse forests in the world. This rich diversity represents both a challenge and an opportunity for woodland owners interested in managing western hemlock on their property.
Published February 1915. 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
Published March 1916. 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
The abundance of algal species and their parasites
was monitored weekly for two years in a sewage lagoon
at the Corvallis Airport, Oregon. During the cooler
months, Euglena species were dominant followed by a
Chlamydomonas assemblage in the spring and a
predominantly Scenedesmus assemblage in the summer and
fall. Parasites...
The flow of incompressible, viscous fluids in R³ is governed by the non-linear Navier-Stokes equations. Two common linearizations of the Navier-Stokes equations, the Stokes equations and the Oseen equations, are studied in this thesis using probabilistic methods.
The incompressibility condition presents new challenges for the well known theory relating partial...
Concerns have been expressed that wheat (Triticum aestivum L.) cultivars selected under optimum conditions may lack adequate adaptation for stress environments. Experimental populations were grown under three environmental conditions 1) optimum, 2) reduced irrigation, and 3) high temperature. Field experiments were conducted at the Center for Northwest Experimental Station (CIANO),...
Numerical results are presented using a higher-order pseudo-spectral method in order to solve the Zakharov-Craig-Sulem formulation of the Euler model. We study the effects of variable bathymetry on weakly-dispersive, weakly-nonlinear, shallow water waves. Improved predictions on wave amplitude and shoaling behavior are developed by analytical means in the context of...
In this dissertation we consider two application specific flow and transport models in porous media at multiple scales: 1) methane gas transport models for hydrate formation and dissociation in the subsurface under two-phase conditions, and 2) coupled flow and biomass-nutrient model for biofilm growth in complex geometries with biofilm, and...
Invasive plants have the potential to reduce the diversity of species in plant and animal communities. I examined the negative effect of two invasive wetland plants, purple loosestrife and reed canary grass, on the species richness and diversity of plant and moth communities within 24 wetland study sites in the...
A method for isolating the salt gland (SG) from the larval brine
shrimp has been developed. This extra-renal organ is removed from 5-10%
of Stage Inauplii by vortexing after incubating the animals at 37°C for
8 hours in a saline solution buffered with 100 mM sodium phosphate at pH
7.6....
Published June 1930. 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
Published October 1967. 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
Production of renewable energy from biomass has been promoted as means to improve greenhouse gas balance in energy production, improve energy security, and provide jobs and income. However, uncertainties remain as to how the agriculture and forest sectors might jointly respond to increased demand for bioelectricity feedstocks and the potential...
Soil moisture is an essential climate variable influencing land–atmosphere interactions, an essential hydrologic variable impacting rainfall–runoff processes, an essential ecological variable regulating net ecosystem exchange, and an essential agricultural variable constraining food security. Large-scale soil moisture monitoring has advanced in recent years, creating opportunities to transform scientific understanding of soil...
Published June 1931. 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
Published May 1930. 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
Published December 1930. 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
Published May 1912. 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
Published March 1908. 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
Published May 1933. 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
Porphyry Cu-(Au-Mo) deposits are critical sources of several economically important metals. The processes governing the total metal endowment and relative proportions of ore metals at these large magmatic-hydrothermal deposits remain uncertain. The Sulphurets porphyry district, in northwestern British Columbia, Canada, contains four porphyry Au-Cu-Mo deposits that each feature distinct Cu/Au...