The logistic map is one of the simple systems exhibiting order to chaos transition. In this work we have investigated the possibility of using the logistic map in the chaotic regime (logmap) for a pseudo random number generator.To this end we have performed certain statistical tests on the series of numbers obtained from the logmap. We find that the logmap passes these tests satisfactorily and therefore it possesses many properties required of a pseudo random number generator. PACS number(s): 05.45 +b, 05.20, 01.50.H, 02.70Lq a phatak@iopb.ernet.in b suresha@iopb.ernet.in

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The immensity of the data transfer requirements of multimedia objects will require multimediaservers to be foundedon disk arrays. To effectively utilize a disk array, and hence to maximize the number of clients that can be serviced simultaneously, a multimedia server must interleave the storage of each media stream among the disks in the array. In this paper we identifi two placement policies for organizing storage of multimedia objects on disk arrays. We present methods for optimizing the perfomnee of server for both the placement policies, and empirically validate and evaluate the methods through extensive trace driven simulation.

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