A. H. M. Rezaul Karim

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In this paper we try to develop an algorithm for visual obstacle avoidance of autonomous mobile robot. The input of the algorithm is an image sequence grabbed by an embedded camera on the B21r robot in motion. Then, the optical flow information is extracted from the image sequence in order to be used in the navigation algorithm. The optical flow provides(More)
Mobile Ad hoc networks (MANETs) are susceptible to several attacks due to their general infrastructureless scenario, dynamic topology and other characteristics. General security mechanisms that exist in wired network cannot be applied efficiently in MANET. In the current literature, there are many proposals for intrusion detection system (IDS) in MANET as a(More)
In structured peer-to-peer (p2p) networks such as CAN, Pastry, Chord and Tapestry, there are two general approaches of doing application layer multicast (ALM) i.e. tree building and flooding. In terms of latency, routing length and link stress, tree based ALM like Scribe on Pastry provides better performance than flooding based ALM like in CAN. In this(More)
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