Daniel R. Fuhrmann

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In references [4-71, the formulation and analysis of a decision rule for target presence was derived for a radar using an array antenna, under the assumption of Gaussian noise with unknown covariance. It was assumed that a single N-length data vector (called the “primary” vector) may contain a signal or target return with known direction vector s and(More)
We explore transmit signaling and receive signal processing strategies for a notional MIMO radar system consisting of widely distributed phased arrays. The assumptions are that within a phased array, there is a fixed rigid geometry and perfect phase synchronization, and there is a single look at the target. In constrast, between phased arrays there is(More)
The hybrid MIMO phased array radar (HMPAR) is a notional concept for a multisensor radar architecture that combines elements of traditional phased-array radar with the emerging technology of multiple-input multiple output (MIMO) radar. A HMPAR comprises a large number, MP, of T/R elements, organized into M subarrays of P elements each. Within each subarray,(More)
To my parents Acknowledgments Let me begin by thanking my adviser Victor Wickerhauser for his encouragement and support over the past three years, and for his conndence in my ability to complete this dissertation. I owe special thanks to Guido Weiss for substituting as advisor while Victor Wickerhauser was on academic leave in the spring of 1998. I would(More)
AIMS This study aimed to evaluate the performance of ethyl glucuronide (EtG) in hair and fingernails as a long-term alcohol biomarker. DESIGN Cross-sectional survey with probability sampling. SETTING Midwestern United States. PARTICIPANTS Participants were 606 undergraduate college students between the ages of 18 and 25 years at the time of selection(More)
Over the past decade, the use of hair specimens for the long-term detection of the alcohol biomarker ethyl glucuronide has been increasing in popularity and usage. We evaluated the usefulness of fingernail clippings as a suitable alternative to hair for ethyl glucuronide detection. A liquid chromatography-tandem mass spectrometry method for the detection of(More)
Two experiments for evaluating psychophysical distortion metrics for JPEG-encoded images are described. The first is a threshold experiment, in which subjects determined the bit rate or level of distortion at which distortion was just noticeable. The second is a suprathreshold experiment in which subjects ranked image blocks according to perceived(More)