Amitabha Chakrabarty

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—This paper presents a nonblocking routing algorithm for Beneš networks. Such networks are of potential interest in implementing large scale optical cross-connects, but their complex routing algorithm limits their applications. We use a simple approach to determine the routing tags for a conflict free routing. Available methods proposed in the literature(More)
The Bene¿s network is a long established method to connect large switching networks. This network has the characteristic of providing multiple paths for same output request. In this paper, we present a new routing algorithm that can route data from given input to the desired output. Our method uses one of the available paths for Input/Output request(More)
In the recent years, reconstructing 3D liver and its vessels from abdominal CT volume images becomes an inevitable and necessary research field. In this paper, a method of 3D reconstruction of liver with its vessels has been implemented, which involves volume preprocessing, de-noising, segmentation, contouring, and combination of different modalities. An(More)
I Declaration We hereby declare that this thesis is based on the results we found by our work. Contents of work found by other researcher(s) are mentioned by reference. This thesis has never been previously submitted for any degree neither in whole nor in part. II Acknowledgement We would like to thank God almighty for giving us the opportunity and ability(More)
We revisited the problem of efficient implementation of large scale switching systems using repackable networks [16], which offer performance approaching that of strict sense nonblocking networks. In particular, we study repackable networks with more than three stages. Our method uses bypass path(s) for designing the repackable network to maintain path(More)
Symmetric rearrangeable networks have been a topic of research interest for a long time in the communication community. In recent years these networks have been suggested for use in high speed communications such as in optical cross connects, because of their unique feature of being able to rearrange the state of the network to unblock a blocked request.(More)
Transferring messages or packets through a network using human mobility as a means, requires intelligent routing decisions. Throughout an opportunistic network, nodes travel with a few messages and searches for an opportunity to deliver the message. A good delivery rate of such messages in these sort of networks is a challenge which might require complex(More)