Index Catalog // ScholarsArchive@OSU

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

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

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

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

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

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

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

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

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

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

ScholarsArchive@OSU

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

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

Enhanced-accuracy oversampled data converters

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

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

Regression calibration and maximum likelihood inference for measurement error models

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

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

Enhancing community college revenue sources by leveraging land resources

Channel estimation and data detection for mobile MIMO OFDM systems

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