Thomas J. Stevens

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We address the following scenario: a single target moves through a field of stationary sensors with known locations. At each time epoch, each sensor is either active or not; each active sensor outputs either target detected or not detected. The probability of target detection is a decreasing function of the distance from a sensor to the target. A particle(More)
This paper describes a novel application of a probabilistic neural network for overcoming the computational complexity involved in performing sensor configuration management in a collaborative sensor network. We consider the problem of reliably tracking a target moving through a field of stationary sensors by fusing the measurements returned from the(More)
The objective of this study was to evaluate the costs of biologically controlling infestations of silverleaf whitefly, Bemisia argentifolii Bellows & Perring, in New England greenhouse operations on poinsettia, Euphorbia pulcherrima Wild, ex Koltz, using the parasitic wasp Encarsia formosa Gahan (Nile Delta strain). Partial budget analysis was used to(More)
ii ACKNOWLEDGEMENTS " If I have seen far, it is by standing on the shoulders of giants. " Sir Isaac Newton (1643 – 1727) Many thanks are owed to friends and family near and far without whom these pages would not have materialized. I am grateful to Dr. Thompson for his guidance, patience, and counsel and for providing me the opportunity of conducting(More)
and "information." Data are empirical measA minicomputer online information retrieval ures of reality. Data do not become information program is described that is designed to faciliuntil they are compiled, processed, and organtate timely distribution of agricultural market ized so that they can have value to a decision news to state and county research and(More)
We address the following scenario: a single target moves through a field of stationary sensors with known locations. At each time epoch, each sensor is either active or not; each active sensor outputs either target detected or not detected. The probability of target detection is a decreasing function of the distance from a sensor to the target. A particle(More)
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