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Filtering by: Creator Draper, John A. Remove constraint Creator: Draper, John A. Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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  • Growth and characterization of zinc ferrite thin films for high frequency applications

    Creator:
    Hu, Jiqing
    Abstract:
    Ferrites have been used for various high frequency applications as bulk materials. These applications, however, are limited to large dimension devices. In this thesis, thin film ferrites were deposited from a low temperature solution-based deposition process that is suitable for micro-scale high frequency applications. The low temperature nature of this...
    Resource Type:
    Dissertation
    Full Text:
    Applications by Jiqing Hu A DISSERTATION submitted to Oregon State

  • Enhanced-accuracy oversampled data converters

    Creator:
    Ceballos, Jose Luis
    Abstract:
    Digital-to-analog converters (DACs) suffer from static and dynamic nonlinearity problems, which degrade their accuracy and performance. Mismatch errors in the analog components restrict the maximum achievable linearity. This thesis presents various techniques for correcting these errors. It describes a correction process for the nonlinear behavior of DACs, on three different...
    Resource Type:
    Dissertation
    Full Text:
    describes a correction process for the nonlinear behavior of DACs, on three different levels

  • Quantities of prostaglandins in whole and extended bovine semen and their potential effect on fertility following insemination

    Creator:
    Jaeger, John Ralph
    Abstract:
    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...
    Resource Type:
    Dissertation
    Full Text:
    THE DISSERTATION OF John R. Jaeger for the degree of Doctor of Philosophy in Animal Science

  • Regression calibration and maximum likelihood inference for measurement error models

    Creator:
    Monleon-Moscardo, Vicente J.
    Abstract:
    Regression calibration inference seeks to estimate regression models with measurement error in explanatory variables by replacing the mismeasured variable by its conditional expectation, given a surrogate variable, in an estimation procedure that would have been used if the true variable were available. This study examines the effect of the uncertainty...
    Resource Type:
    Dissertation
    Full Text:
    variable by its conditional expectation, given a surrogate variable, in an estimation procedure that

  • Use of nondestructive spectroscopy to assess chlorophyll and nitrogen in fresh leaves

    Creator:
    Ding, Pinghai
    Abstract:
    Four aspects of factors influencing the accuracy of nondestructive chlorophyll (Chl) and nitrogen (N) measurement in fresh leaves were studied: (1) optimum wavelength (OW) identification; (2) indices development and evaluation; (3) influence of leaf properties; and (4) influence of meter parameters and sampling technique. Results were used to develop indices...
    Resource Type:
    Dissertation
    Full Text:
    committee, Drs. Carolyn Scagel, Robert Linderman, Carmo M. Vasconcelos, John A. Young, and Thomson K

  • Channel estimation and data detection for mobile MIMO OFDM systems

    Creator:
    Gao, Jie
    Abstract:
    Designing spectral efficient, high-speed wireless links that offer high quality- of-service and range capability has been a critical research and engineering challenge. In this thesis, we mainly address the complexity and performance issues of channel estimation and data detection in multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems over...
    Resource Type:
    Dissertation
    Full Text:
    efficient, high-speed wireless links that offer high quality- of-service and range capability has been a

  • Population demography, resource use, and movement in cooperatively breeding Micronesian Kingfishers

    Creator:
    Kesler, Dylan C.
    Abstract:
    Island systems and species are susceptible to extinction because of their small population size and an ecological naiveté from an evolutionary past lacking strong competition and predation. For example, only one-fifth of the world’s bird species occur on islands, yet more than 90% of the avian extinctions witnessed during historic...
    Resource Type:
    Dissertation
    Full Text:
    . Research addressing cooperative breeding suggests that the behavior is a complex response to interacting

  • Expression and Function of Populus Homologs to TERMINAL FLOWER 1 Genes: Roles in Onset of Flowering and Shoot Phenology

    Creator:
    Mohamed, Rozi
    Abstract:
    We isolated and characterized the expression of two genes from Populus trichocarpa that are homologous to the TERMINAL FLOWER 1 (TFL1) gene from the model annual plant Arabidopsis. In Arabidopsis, overexpression of the TFL1 gene extends the vegetative growth phase, and the homozygous mutant tfl1 allele causes early flowering and...
    Resource Type:
    Dissertation
    Full Text:
    vegetative growth phase, and the homozygous mutant tfl1 allele causes early flowering and formation of a

  • Structure elucidation of bioactive natural products from Madagascar marine algae and cyanobacteria

    Creator:
    Andrianasolo, Eric Hajaniriana
    Abstract:
    This thesis is an investigation of the natural products deriving from marine algae and cyanobacteria and has resulted in the discovery of eleven new secondary metabolites. The structure elucidations of these new molecules were performed using a variety of spectroscopic techniques. Four new macrolides were isolated and characterized from the...
    Resource Type:
    Dissertation
    Full Text:
    these new molecules were performed using a variety of spectroscopic techniques. Four new macrolides

  • Developing a basis for characterizing precision of estimates produced from non-probability samples on continuous domains

    Creator:
    Cooper, Cynthia
    Abstract:
    This research addresses sample process variance estimation on continuous domains and for non-probability samples in particular. The motivation for the research is a scenario in which a program has collected non-probability samples for which there is interest in characterizing how much an extrapolation to the domain would vary given similarly...
    Resource Type:
    Dissertation
    Full Text:
    presented on February 14, 2006. Title: Developing a Basis for Characterizing Precision of Estimates