Index Catalog // ScholarsArchive@OSU

Likelihood analysis of the multivariate ordinal probit model for repeated and spatial ordered categorical responses

Creator:: Li, Yonghai
Abstract:: This dissertation is about the likelihood analysis of ordered categorical responses in a longitudinal/spatial study, meaning regression-like analysis when the response variable is categorical with ordered categories, and is measured repeatedly over time or space on the experimental or sampling units. Particular attention is given to the multivariate ordinal probit...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Yonghai Li for the degree of

Biophysical factors driving the distribution and abundance of redband/steelhead trout (Oncorhynchus mykiss gairdneri) in the South Fork John Day River Basin, Oregon, USA

Creator:: Madriñán, Luis Francisco
Abstract:: The overall goal of this study was to identify multiple scales of habitat use and habitat electivity by redband/steelhead trout and define the limiting factors affecting the distribution patterns of this species during summer flows. The main objective in chapter 2 was to identify the most important habitat associations that...
Resource Type:: Dissertation
Full Text:: Hiram W. Li Guillermo R. Giannico The overall goal of this

Fatigue and fracture of bulk metallic glasses : role of free volume

Creator:: Launey, Maximilien E.
Abstract:: Deformation of metallic glasses requires the existence of free volume to allow atomic movement under mechanical loading. Accordingly, the present research seeks to understand how free volume variations in alloys of identical compositions affect the fatigue and fracture behavior. By annealing below the glass transition temperature, the free volume of...
Resource Type:: Dissertation
Full Text:: : • Dr. Brian Bay • Dan Berry • Professor Jack Ferracane • Dr. Isabella Gallino • Professor David

Clostridium perfringens sporulation and gliding motility

Creator:: Huang, I-Hsiu
Abstract:: Clostridium perfringens type A isolates, an anaerobic enterotoxigenic spore forming bacterium, are the third leading cause of food-borne disease in the United States. Factors that contribute to the virulence of C. perfringens include the ability of the bacterium to form heat resistant spores and to produce an enterotoxin (CPE). Although...
Resource Type:: Dissertation
Full Text:: . Also many thanks to my committee members, Dr. Luiz Bermudez, Dr. Claudia Hase, Dr. Emily Ho, Dr. Dan

Molecular basis for Clostridium perfringens spore resistance to heat and other environmental stress factors

Creator:: Raju, Deepa
Abstract:: Clostridium perfringens type A isolates producing enterotoxin (CPE) are an important cause of both food poisoning (FP) and non food borne gastrointestinal diseases (NFBGID) in both humans and animals. C. perfringens type A food poisoning is caused by isolates carrying the CPE encoding gene (cpe) on the chromosome while the...
Resource Type:: Dissertation
Full Text:: thanks to my committee members, Dr. Dan Rockey, Dr. Luiz Bermudez, Dr. J. Antonio Torres and Dr. Taifo

Effects of disturbance modes on mycorrhizal fungus communities at Crater Lake National Park

Creator:: Trappe, Matt
Abstract:: Crater Lake National Park presents an excellent opportunity for ecological research due to its relatively pristine landscape, the protection of its natural features, its infrastructure, and a Park administration supportive of scientific inquiry and restoration ecology. The research presented here examines the responses of fungi to various forms of perturbation....
Resource Type:: Dissertation
Full Text:: Michael Castellano, Dan Luoma, and Joey Spatafora all provided technical assistance throughout the

Multi-scale relationships between aspen and birds in the northern Yellowstone ecosystem

Creator:: Hollenbeck, Jeff P., 1967-
Abstract:: I conducted a multi-scale evaluation of aspen – bird relationships in the northern ungulate winter range of the northern Yellowstone ecosystem during June 2001-03. Questions addressed were: (1) Does bird diversity increase with conifer presence in aspen stands? (2) Given known habitat selection cues, are migrating birds passively intercepted by...
Resource Type:: Dissertation
Full Text:: logistical support provided by Dan Tyers at the Gardiner District Office of the Gallatin National Forest

Validation of an instrument for mathematics enhancement teaching efficacy of Pacific Northwest agricultural educators

Creator:: Jansen, Daniel J.
Abstract:: Teacher efficacy continues to be an important area of study in educational research. This study tested an instrument designed to assess the perceived efficacy of agricultural education teachers when engaged in lessons involving mathematics instruction. The study population of Oregon and Washington agricultural educators utilized in the validation of the...
Resource Type:: Dissertation

Spatial and temporal scales of genetic change in two overfished rockfishes

Creator:: Gomez-Uchida, Daniel
Abstract:: Pacific rockfishes (genus Sebastes) have attracted wide scientific and public interest from an evolutionary, fishery and conservation standpoints. This dissertation addresses several hypotheses involving spatial and temporal scales of genetic change in two overfished rockfishes, darkblotched (S. crameri) and canary rockfish (S. pinniger), using statistical analyses of genetic variation within...
Resource Type:: Dissertation
Full Text:: obliged to Dan Kamikawa, Keith Bosley, Jennifer Menkel, Mark Wilkins, Beth Horness, Waldo Wakefield and

Trans-Pacific and regional atmospheric transport of anthropogenic semivolatile organic compounds in the western U.S.

Creator:: Primbs, Toby
Abstract:: The atmospheric transport of anthropogenic semivolatile organic compounds (SOCs) from Asian sources to the Western U.S. was investigated. In addition, the SOC extraction method was optimized. Hansen solubility parameter plots were used to aid in the pressurized liquid extraction (PLE) solvent selection of air sampling media in order to minimize...
Resource Type:: Dissertation
Full Text:: , Dr. Shungo Kato, Dr. Shiro Hatakeyama, Dr. Yoshizumi Kajii, and Dr. Dan Jaffe provided AMS, CO, Hg0

ScholarsArchive@OSU

Likelihood analysis of the multivariate ordinal probit model for repeated and spatial ordered categorical responses

Biophysical factors driving the distribution and abundance of redband/steelhead trout (Oncorhynchus mykiss gairdneri) in the South Fork John Day River Basin, Oregon, USA

Fatigue and fracture of bulk metallic glasses : role of free volume

Clostridium perfringens sporulation and gliding motility

Molecular basis for Clostridium perfringens spore resistance to heat and other environmental stress factors

Effects of disturbance modes on mycorrhizal fungus communities at Crater Lake National Park

Multi-scale relationships between aspen and birds in the northern Yellowstone ecosystem

Validation of an instrument for mathematics enhancement teaching efficacy of Pacific Northwest agricultural educators

Spatial and temporal scales of genetic change in two overfished rockfishes

Trans-Pacific and regional atmospheric transport of anthropogenic semivolatile organic compounds in the western U.S.

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