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Filtering by: Creator Alexander, David B. Remove constraint Creator: Alexander, David B. Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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  • Frequency-domain, parameter estimation for a brushless, doubly-fed machine

    Creator:
    Ramchandran, Ashok
    Abstract:
    A Brushless, Doubly Fed Machine (BDFM) attempts to combine the advantages of conventional induction and synchronous types of electrical machines by its unique architecture. The validation of BDFM designs in an actual test environment requires the estimation of the BDFM model parameters from actual experimentation. Accurate values for the parameters...
    Resource Type:
    Dissertation
    Full Text:
    , Parameter Estimation for a Brush less, Doubly-Fed Machine Abstract apt:a: Ned: Gerald C. Alexander A

  • Capacitive coupling compensation facilitating single-pole switching on six-phase transmission lines

    Creator:
    Al-Shehri, Abdallah M.
    Abstract:
    In this research, a novel shunt compensation scheme design procedure is developed for unbalanced, untransposed n-phase transmission lines. The main function of the scheme is to reduce the effect of the capacitive coupling on untransposed transmission lines to levels where successful single-pole switching is assured. The analysis procedure is carried...
    Resource Type:
    Dissertation
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    privacy Abstract approved: Gerald C. Alexander In this research, a novel shunt compensation scheme

  • Value of Prior and Novel Information in Managing a Mixed-Stock Recreational Chinook Salmon Fishery

    Creator:
    Jensen, Alexander J.
    Abstract:
    Many economically important Pacific salmon fisheries along the west coast of North America are mixed-stock, recreational systems, in which managers strive to account for interactions between fish, anglers, and management policy while balancing fishery access against conservation of vulnerable stocks. Specific challenges facing fisheries managers include limited control over angling...
    Resource Type:
    Dissertation
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    AN ABSTRACT OF THE DISSERTATION OF Alexander J

  • Interrenal and metabolic responses to stress and their modifying factors in juvenile salmonid fishes

    Creator:
    Barton, Bruce Alexander
    Abstract:
    Genetic, ontogenetic, and environmental factors modified characteristic interrenal and glycemic responses to stress in juvenile salmonid fishes. During continuous confinement stress, plasma cortisol rose more quickly in chinook salmon, Oncorhynchus tshawytscha, acclimated to high rather than medium or low temperatures; hyperglycemia following either acute or chronic stress was also highest...
    Resource Type:
    Dissertation
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    AN ABSTRACT OF THE THESIS OF Bruce Alexander Barton for the

  • Fire severity and vegetation response to fire in riparian areas of the Biscuit and B&B Complex Fires, Oregon

    Creator:
    Halofsky, Jessica E.
    Abstract:
    Fire is the dominant disturbance process in western U.S. forests, and although effects of fire in upland forests are relatively well-studied, there is little information about fire effects on riparian forests, critical areas of the landscape for both habitat and water quality. This dissertation examines different aspects of fire effects...
    Resource Type:
    Dissertation
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    . Title: Fire Severity and Vegetation Response to Fire in Riparian Areas of the Biscuit and B&B Complex

  • Hybrid computer simulation of wind-driven ocean currents

    Creator:
    Vithayathil, Francis Joseph
    Abstract:
    A simulation method using a hybrid computer is developed in this dissertation to enhance the study of wind-driven ocean circulation. The simulation is based on the mathematical model developed by Ekman. Pure digital simulation is not economical due to excessive computer time required for the solution of the partial differential...
    Resource Type:
    Dissertation
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    OCEAN CURRENTS Abstract approved: Redacted for privacy Associate Professor Gerald/C. Alexander A

  • Applied economic strategies to evaluate policies and environmental outcomes: case studies from immigration and ecosystem services

    Creator:
    Natanson, Alexander D.
    Abstract:
    My dissertation title is, “Applied economic strategies to evaluate policies and environmental outcomes: case studies from immigration and ecosystem services.” The first two chapters of this dissertation concern the relationship between local immigration policies and societal welfare. The third chapter examines the impact of human activity on the environment and...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF Alexander David

  • B-cell heterogeneity in salmonids

    Creator:
    Irwin, Michael J.
    Abstract:
    Salmonid B lymphocytes were stimulated both in vivo and in vitro and shown to produce antibody specific for the immunogen. A passive hemolytic plaque assay was employed to demonstrate B cells producing specific antibody. Characterization of plaque forming cells (PFCs) involved sequential inhibition with a series of graded concentrations of...
    Resource Type:
    Dissertation
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    B-cell heterogeneity in salmonids AN ABSTRACT OF THE

  • Ensemble-variational data assimilation for dynamically challenging coastal ocean circulation

    Creator:
    Pasmans, Ivo
    Abstract:
    Currently, forecasts produced by the Oregon-Washington (OR-WA) Coastal Ocean Forecast System are constrained by assimilation of only surface observations. The 4-dimensional variational (4DVAR) data assimilation (DA) algorithm is utilized to combine the model and the data, with the time-independent forecast ("background'') error covariance B. In this study, two possible improvements...
    Resource Type:
    Dissertation
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    Circulation Abstract approved: Alexander L. Kurapov Currently, forecasts produced by the Oregon-Washington

  • Subwavelength light confinement and quantum chaos in micro- and nano-structured metamaterials

    Creator:
    Govyadinov, Alexander A.
    Abstract:
    This dissertation concerns a broad range of unique phenomena related to the light propagation at nano- and micro-scales. To access the nano-domain, we introduce anisotropy-based waveguides with positive- and negative-index modes. These novel structures allow energy propagation in subwavelength regions and, in contrast to surface waves, have the mode structure...
    Resource Type:
    Dissertation
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    AN ABSTRACT OF THE DISSERTATION OF Alexander A. Govyadinov for the