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21 Ž . Concentrations of cosmogenic Ne Ne measured in quartz have been used to estimate long-term rates of denudation c for contrasting landscape components in the Dry Valleys area of the Transantarctic Mountains, southern Victoria Land, Antarctica. Samples of Beacon Supergroup sandstones and granitic basement were collected from two contrasting landscape… (More)
We describe the architecture and design of an optical WDM ring network suited to local, campus and metropolitan area applications. The proposed architecture is flexible and robust, is compatible with existing local and metropolitan area network standards, has the potential for low-cost implementation and offers an elegant upgrade path to larger numbers of… (More)
— We present a new steady-state frequency-domain model of highly nondegenerate four-wave mixing in bulk semiconductor optical amplifiers (SOA's). The model can handle a large number of interacting optical fields and situations in which the nonlinear interactions are complex. It accounts for the longitudinal dependence of the population inversion in the SOA… (More)
I am a second-year student nurse and pleased to see a forum open up on both preregistration education and the future of nursing (Features May 11).