J. L. Ramirez

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In this paper we present a fixed point theorem for mappings defined in an N -polygonal cone metric space. Some generalizations of fixed point theorems for S-Kannan and S-Chatterjea contractive mappings on cone metric spaces will be also shown. In these results the underlying cone metric space is considered over a Banach space ordered by a normal cone.
A four-stage depressed collector is designed with MICHELLE using the optimization tool in ANALYST. The effect of slow or “true” secondary electrons (SSE), back-scattered primary electrons (BSE) and different geometries are studied in the modeling of multi-stage depressed collectors. Details of the design and optimization philosophy along with(More)
HDV infectivity particularly related to sexual activity has been difficult to establish. We investigated the prevalence of HDV in a high risk urban male population currently evaluated for HIV infection. Fourth-eight homosexual or bisexual men (96% positive for HIV) being routinely followed in the outpatient clinic, 40 sera obtained randomly from male(More)
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