A three-dimensional (3-D) finite-difference timedomain (FDTD) algorithm is developed to study the transformation of an electromagnetic wave by a dynamic (time-varying) inhomogeneous magnetized plasma medium. The current density vector is positioned at the center of the Yee cube to accommodate the anisotropy of the plasma medium due to the presence of a static magnetic field. An appropriate time...

We present a technique for summarizing a video into a short segment, while preserving the important events in the original. While many techniques remove whole frames from the video stream when condensing it, we observe that these deleted frames need not come from a single time step. More generally, deleted frames are “sheets” through the space-time volume. This leads to an algorithm whereby she...

in this paper, we propose space-time block codes based on constituent intersectant orthogonal designs. after channel model is formulated, we studied the space-time block codes from constituent intersectant orthogonal designs. at last we made simulations for the space-time block codes from complex orthogonal design and the space-time block codes from constituent intersectant orthogonal design to...

We study the problem of keyword search in a data cube with text-rich dimension(s) (so-called text cube). The text cube is built on a multidimensional text database, where each row is associated with some text data (e.g., a document) and other structural dimensions (attributes). A cell in the text cube aggregates a set of documents with matching attribute values in a subset of dimensions. A cell...

This paper presents an optical interconnect model for k-ary n-cube network topologies based on free-space analysis. This model integrates relevant parameters inherent to optics with traditional network parameters to make it applicable for performance evaluation of parallel processor optical network designs. We apply this model to a free-space diffractive-reflective optical interconnect and comp...

the term globalization undoubtedly has affected all parts of humanity life in current century. globalization as a comprehensive phenomenon has influenced economical, political, social and cultural aspects of our societies. contemporary architecture as a multidimensional category is depended on various factors and needs to be pursued in different fields, in order to reach to a perfect comprehend...

By introducing some redundant Klee-Minty constructions, we have previously shown that the central path may visit every vertex of the Klee-Minty cube having 2 − 2 “sharp” turns in dimension n. In all of the previous constructions, the maximum of the distances of the redundant constraints to the corresponding facets is an exponential number of the dimension n, and those distances are decaying geo...

Let Ω be a compact convex set in Euclidean n-space with nonempty interior. Random triangles are defined here by selecting three independent uniformly distributed points in Ω to be vertices. Generating such points for (n,Ω) = (2,unit square) or (n,Ω) = (3,unit cube) is straightforward. For (n,Ω) = (2,unit disk) or (n,Ω) = (3,unit ball), we use the following result [1]. Let X1, X2, X3, Y1, Y2, Y3...

We explain how to adapt a construction of M. Sageev’s to construct a proper action on a CAT(0) cube complex starting from a proper action on a wall space.