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This paper describes a model of three-dimensional cellular automata allowing to simulate different phenomena in the fields of computer graphics and image processing, and to combine them together in order to produce complex effects such as automatic multitexturing, surface imperfections, or biological retina multi-layer cellular behaviours. Our cellular(More)
OBJECTIVE To determine the frequency of asymptomatic perianal shedding of herpes simplex virus (HSV) in adult patients with acquired immunodeficiency syndrome (AIDS). DESIGN Cross-sectional study. SETTING A 1000-bed, state-supported hospital in Brazil that provides comprehensive health care. PATIENTS Eighty-two consecutively hospitalized patients with(More)
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