Thesis (M.S.)--Kent State University, 2008. / Title from PDF t.p. (viewed Jan. 21, 2010). Advisor: Austin Melton. Keywords: Software metrics; comparison; classical measurement. Includes bibliographical references (p. 89-93).

Zugl.: Erlangen, Nürnberg, Univ., Diss., 2009

Thesis (M.S.)--Kent State University, 2009. / Title from PDF t.p. (viewed Nov. 13, 2009). Advisor: Austin Melton. Includes bibliographical references (p. 79-81).

Thesis (M.S. in Operations Research)--Naval Postgraduate School, June 2003. / Thesis advisor(s): Eugene P. Paulo, Alvin F. Crowder, Susan M. Sanchez. Includes bibliographical references (p. 49). Also available online.

Thesis (M.S. in Contract Management)--Naval Postgraduate School, June 2003. / Thesis advisor(s): Jeffrey R. Cuskey, Bernard J. MCDevitt. Includes bibliographical references (p. 127-129). Also available online.

Jitter is a dominant factor contributing to a high bit error rate (BER) in high speed I/O circuitry, and it aggravates the quality of a clock signal from a phase-locked loop (PLL), subsequently impacting a given timing budget. The recent proliferation of systems-on-a-chip (SoCs) with help of technology scaling makes jitter measurement more challenging as the SoCs integrate more I/O circuitry and PLLs within a chip. Jitter has been, however, one of the most difficult parameters to measure accurately when validating the high speed serial I/O circuitry or PLLs, mostly due to its small value. External instruments with full-fledged high precision measurement hardware, along with comprehensive analysis tools, have been used for jitter measurement, but increased test cost from long test time, signal integrity, and human intervention prevent this approach from being used for high volume manufacturing testing. Built-in self-test (BIST) solutions have recently become attractive to overcome these drawbacks, but complicated analog circuit designs that are sensitive to ever increasing process variations, and associated complex analysis methods impede their adoption in the SoCs. This dissertation studies practical random jitter measurement methods that achieve measurement accuracy by exploiting a differential approach and make the proposed methods tester-friendly solutions for an automatic test equipment (ATE). We first propose a method of measuring the average value of the random jitter, rather than measuring the jitter at every clock cycle, that can be converted to the root-mean-square (RMS) value of the random jitter, which is the key indicator of the quantity of the random jitter. Then, we propose a simple but accurate delay measurement method which uses the proposed jitter measurement method for random jitter measurement when a reference signal, such as a golden PLL output in high speed I/O validation, is not available. The validity of the proposed random jitter measurement method is supported by measurement results from a test chip. The impact of substrate noise on the signal of interest is also shown with measurements using a test chip. To address the random jitter of a clock signal when the clock is operating in its functional mode, we demonstrate a novel method for random jitter measurement that explores the shmoo capability of a low-cost production tester without relying on any BIST circuitry. / text

Left ventricular (LV) volume analysis in small animals has proven difficult because of the small size of the hearts and the rapid heart rate. Furthermore, there is a substantial contribution to the signal from both the blood as well as the muscle. Admittance - based measurement techniques has been proven effective in eliminating the muscular component and estimating the blood component accurately. The key factor that makes this measurement effective is the fact that the measurement is made in the complex plane, which measures both the magnitude as well as the phase of the complex phasor. This dissertation presents the design of a wireless telemetric device that measures impedance magnitude and phase measurements along with pressure from conscious, ambulatory rats. Using this impedance data along with other calibration data such as blood resistivity, stroke volume etc., volume is determined. / text

published_or_final_version / Speech and Hearing Sciences / Master / Master of Philosophy

Not available / text

The development and validation of new technology for the accurate and traceable metering of high value fluids is presented here. The focus of this doctoral submission is on the determination of fluid density by the measurement of relative permittivity. A prototype cell, comprising a re-entrant cavity resonator, for the precise determination of the relative permittivity of gases and hydrocarbon liquids over a wide range of both pressures and temperatures has been developed for this work. Accuracies of measurement of relative permittivity with the re-entrant cavity resonator technique of better than 1 ppm may be achieved. Reference quality relative permittivity measurements were performed and expressions developed for ethylene which are specific to industrial metering applications ( 0 ≤ t ≤ 30°C and 5 ≤ p ≤ 10 MPa). The uncertainty in values of density calculated from the mapping relationship is approximately 0.03 % in density at a 95 % confidence level. The laboratory facility used to perform the fluid mapping or characterisation was based around a high-performance RF network analyser as the principle measuring instrument. However, an on-line instrument must be simple to operate, relatively compact, robust and considerably less expensive; particularly if it is to be widely deployed. The aimed accuracy in the measurement of relative permittivity of the on-line instrument was 5 ppm; a factor of five lower than the laboratory instrument. For the on-line instrument, the re-entrant cavity resonator was incorporated into a feedback oscillator circuit as the frequency determining element. The accuracy of measurement of relative permittivity of the on-line instrument was 2.5 ppm; a factor of two greater than the aimed accuracy. This accuracy of frequency measurement is only achievable over a relatively narrow range of operating conditions, which is ultimately a limiting factor in the applicability of the on-line instrument for high precision relative permittivity measurements in the field.