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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:
    dissertation will become part of the permanent collection of Oregon State University libraries. My signature

  • Design techniques for low-voltage and low-power analog-to-digital converters

    Creator:
    Ahn, Gil Cho
    Abstract:
    With the ever-increasing demand for portable devices used in applications such as wireless communication, mobile computing, consumer electronics, etc., the scaling of the CMOS process to deep submicron dimensions becomes more important to achieve low-cost, low-power and high-performance digital systems. However, this downscaling also requires similar shrinking of the supply...
    Resource Type:
    Dissertation
    Full Text:
    by Gil Cho Ahn A DISSERTATION submitted to Oregon State University in partial fulfillment of the

  • 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:
    understand that my dissertation will become part of the permanent collection of Oregon State University

  • A direct-drive wave energy converter with contactless force transmission system

    Creator:
    Agamloh, Emmanuel B.
    Abstract:
    Commonly proposed ocean wave energy converters (OWEC) use inefficient and maintenance demanding intermediate hydraulic and pneumatic systems. We propose a novel rotary direct-drive OWEC that eliminates these intermediate stages. The new device employs a contactless force transmission system (CFTS) comprising a “piston” and a “cylinder” and a ball screw to...
    Resource Type:
    Dissertation
    Full Text:
    collection of Oregon State University libraries. My signature below authorizes release of my

  • 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:
    A DISSERTATION submitted to Oregon State University in partial fulfillment

  • 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:
    Vicente J. Monleon Daniel W. Schafer Department of Statistics Oregon State University

  • Chunking professional-technical programs to create pathways to degree completion in community colleges

    Creator:
    Dins, Kate
    Abstract:
    The purpose of this study was to explore the phenomenon of community colleges creating pathways to degree completion in professional-technical programs by breaking degree programs into smaller portions, referred to as "chunks." The purpose or possible advantage of chunking was that it would improve the rate of degree completion among...
    Resource Type:
    Dissertation
    Full Text:
    DISSERTATION submitted to Oregon State University in partial fulfillment of the requirements

  • 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:
    Pinghai Ding A DISSERTATION submitted to Oregon State University in partial

  • Enhancing community college revenue sources by leveraging land resources

    Creator:
    Scott, Cheryl L.
    Abstract:
    Community colleges are experiencing a decline in state allocated funding. Traditionally, college administrators look for ways to cut expenditures and raise tuition and fees to make up for the shortfall. Using available land resources to generate a revenue stream may provide revenue for community colleges. The purpose of this study...
    Resource Type:
    Dissertation
    Full Text:
    permanent collection of Oregon State University libraries. My signature below authorizes release of my

  • 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:
    submitted to Oregon State University in partial fulfillment of the requirements for the degree of Doctor