Allalaghatta Pavan

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Efficient one-pass computation of F/sub 0/, the number of distinct elements in a data stream, is a fundamental problem arising in various contexts in databases and networking. We consider the problem of efficiently estimating F/sub 0/ of a data stream where each element of the stream is an interval of integers. We present a randomized algorithm which gives(More)
This paper describes the distributed system, network and software architecture, the application development environment , the performance, and the early lessons learned on the ATM LAN testbed Mercuri established at the Honeywell Technology Center, to develop distributed multimedia technologies for real-time control applications. We have developed a(More)
Boosted by technology advancements, government and commercial interest, ad-hoc wireless networks are emerging as a serious platform for distributed mission-critical applications. Guaranteeing QoS in this environment is a hard problem because several applications may share the same resources in the network, and mobile ad-hoc wireless networks (MANETs)(More)
This paper presents the Real Time Adaptive Resource Management system (RTARM 1), developed at the Honeywell Technology Center. RTARM supports provision of integrated services for real-time distributed applications and offers management services for end-to-end QoS negotiation, QoS adaptation, real-time monitoring and hierarchical QoS feedback adaptation. In(More)
This paper presents an innovative hierarchical feedback adaptation method that efficiently controls the dynamic QoS behavior of real-time distributed data-flow applications, such as sensor-based data streams or mission-critical command and control applications. We applied this method in the context of the Real Time Adaptive Resource Management 1 system, a(More)
Network computing ooers great potential for further advances in the amount of computing power available to large-scale compute-intensive applications. This paper describes a network architecture upon which a high performance distributed computing environment may be constructed. The architecture uses a specially designed Time and Wavelength Division(More)