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Modern mobile robots navigate uncertain environments using complex compositions of camera, laser, and sonar sensor data. Manual calibration of these sensors is a tedious process that involves determining sensor behavior, geometry and location through model specification and system identification. Instead, we seek to automate the construction of sensor model(More)
Pregnant rats were exposed to drinking water with lead (Pb) concentrations of 0, 30, or 200 mg/l. The resultant pups were sacrificed at 11, 15, and 21 d of postnatal age for the determination of synapses/mm3 in parietal cortex. Synaptic counts from electron micrographs of ethanol phosphotungstic acid stained cortical slices were counted by four observers(More)
—A baby experiencing the world for the first time faces a considerable challenge sorting through what William James called the " blooming, buzzing confusion " of the senses [1]. With the increasing capacity of modern sensors and the complexity of modern robot bodies, a robot in an unknown or unfamiliar body faces a similar and equally daunting challenge. In(More)
Other workers have clearly shown that most, if not all, drinking water in the U.S. contains chemicals that possess mutagenic and/or carcinogenic activity by using bacterial and in vitro methods. In the present work, increased numbers of tumors were observed with samples of organic material isolated from 5 U.S. cities administered as tumor initiators in(More)
A recent study of the ability of chloroform in drinking water to produce cancer reported that male Osborne-Mendel rats developed renal tumors, but that female B6C3F1 mice failed to develop hepatocellular carcinomas. The results obtained in the male Osborne-Mendel rats were comparable to those observed in an earlier study sponsored by the National Cancer(More)
The review of available data on the concentrations of asbestos in U.S. water supplies suggests that the majority of water consumers are not exposed to asbestos concentrations over 1 million fibers/Liter. A few populations, however, may be exposed to concentrations over 1 billion fibers/L. Of the 538 water supplies for which waterborne asbestos data are(More)
To test the feasibility of employing a combined lung adenoma/skin papilloma assay for broader detection of chemical carcinogenesis than that realized with either bioassay done separately, four strains of mice, SENCAR, BALB/c, A/J, and ICR-Swiss, were administered carcinogens either by the oral or intraperitoneal (IP) routes. The carcinogens administered(More)