Learn More
— Impulsive control of a chaotic system is ideal for designing digital control schemes where the control laws are generated by digital devices which are discrete in time. In this paper, several theorems on the stability of impulsive control systems are presented. These theorems are then used to find the conditions under which the chaotic systems can be(More)
Clustering of task graphs has been used as an intermediate step toward scheduling parallel architectures. In this paper, we identify important characteristics of clustering algorithms and propose a general framework for analyzing and evaluating such algorithms. Using this framework, we present an analytic performance comparison of four algorithms: Dominant(More)
Fundamental advances in high-level storage architectures and low-level storage-device interfaces greatly improve the performance and scalability of storage systems. Specifically, the decoupling of storage control (i.e., file system policy) from datapath operations (i.e., read, write) allows client applications to leverage the readily available bandwidth of(More)
We investigate the issues involved in developing a scalable World Wide Web (WWW) server on a cluster of workstations and parallel machines, using the Hypertext Transport Protocol (HTTP). The main objective is to strengthen the processing capabilities of such a server by utilizing the power of multicomputers to match huge demands in simultaneous access(More)
We describe a parallel programming tool for scheduling static task graphs and generating the appropriate target code for message passing MIMD architectures. The computational complexity of the system is almost linear to the size of the task graph and preliminary experiments show performance comparable to the “best” hand-written programs.
This work presents a real-time system for multiple object tracking in dynamic scenes. A unique characteristic of the system is its ability to cope with long-duration and complete occlusion without a prior knowledge about the shape or motion of objects. The system produces good segment and tracking results at a frame rate of 15-20 fps for image size of(More)
DOTS (Dynamic Object Tracking System) is an indoor, real-time, multi-camera surveillance system, deployed in a real office setting. DOTS combines video analysis and user interface components to enable security personnel to effectively monitor views of interest and to perform tasks such as tracking a person. The video analysis component performs(More)
Studies showing that neurotrophin binding to p75NTR can promote cell survival in the absence of Trk (tropomyosin-related kinase) receptors, together with recent structural data indicating that NGF may bind to p75NTR in a monovalent manner, raise the possibility that small molecule p75NTR ligands that positively regulate survival might be found. A(More)