M.S., Computer Engineering, 2537, Iowa State University, Ames, IA, USA.
Ph.D., Computer Engineering (Research Excellence Award), 2541, Iowa State University, Ames, IA, USA.
งานวิจัย
My research interest is in the areas of high performance computing, grid computing, mobile networks. Our research group participating in the Thaigrid project. We have operated two clusters, PALM and ENQUEUE, to serve computational intensive tasks. Both of the clusters are the member of APGRID testbeds (see the grid observer here). The ENQUEUE cluster can achieve sustain performance of 32GFLOPs on the HPL Benchmark.
We are currently probe into the sensor network area where we search for the applications in the area of agricultural.
V. Varavithya and P. Mohapatra, "Tree-Based Multicasting on Wormhole Routed Multistage Interconnection Networks," in the IEEE Trans. on Parallel and Distributed Systems, pp. 1159-1178, November 1999.
J. Upadhyay, V. Varavithya, and P. Mohapatra, "A Traffic-Balanced Adaptive Wormhole Routing Scheme for Two Dimensional Meshes," IEEE Transaction on Computers, vol. 46, no.2, February, 1997
Vara Varavithya and Putchong Uthayopas, "ThaiGrid: Architecture and Overview," NECTEC Technical Journal, vol.~II, no.~9, pp.~219--224, Nov-Feb 2001.
Vara Varavithya and Thongchai Thepuatrakul, "Ethernet-Based Interconnections for Massively Parallel Clusters," NECTEC Technical Journal, , vol.~II, no.~9, pp.~205--214, Nov-Feb 2001.
Nattavut Keerativuttiumrong, Nachol Chaiyaratana and Vara Varavithya, "Multi-objective Co-operative Co-evolutionary Genetic Algorithm," Lecture Notes in Computer Sciences, Springer-Verlag, pp.~288--297, no.~2439, 2002.
Conference
Vara Varavithya and Putchong Uthayopas, "ThaiGrid: Architecture and Overview," in the proceeding of the First South East Asia Conference on High Performance Computing, Kasetsart University, Bangkok, 2001.
Jirasak Lapanalarploy and Vara Varavithya "Geographically Distributed Web Servers under Limited Network Bandwidth," in the proceeding of the fifth Annual National Symposium on Computational Science and Engineering, pp. 417-426, Bangkok, 2001.
Vara Varavithya and Putchong Uthayopas "ThaiGrid: Preliminary Studies on Thai's High Performance Computing Infrastructure," in the proceeding of the fifth Annual National Symposium on Computational Science and Engineering, pp. 436-443, Bangkok, 2001.
Tanarat Kunchone and Vara Varavithya, "The Development of Mosaic Pictures using Discrete Cosine Transform," in the proceeding of the National Electrical Engineering Conference (EECON)-23, Chiangmai, 2000.
Vara Varavithya and Thongchai Thepuatrakul, "A High Bandwidth Ethernet Topology for Large Scale Clusters," in the proceeding of the National Electrical Engineering Conference (EECON)-23, Chiangmai, 2000. (Best Paper Award in Computer Engineering)
Vara Varavithya, Pitsanu Lousangfa, and Chumpol Ngamphiw, "Effects of Network Configurations on Performance of Beowulf-class Clusters," in the proceeding of the National Electrical Engineering Conference (EECON)-23, Chiangmai, 2000.
V. Varavithya and P. Mohapatra, "Tree-Based Multicasting on Wormhole Routed Multistage Interconnection Networks," the 26th International Conference on Parallel Processing (ICPP), pp. 203-206, Bloomingdale, IL, August 1997.
P. Mohapatra and V. Varavithya, "A Hardware Multicast Routing Algorithm for Two - Dimensional Meshes," in the Eighth IEEE Symposium on Parallel and Distributed Processing, pp. 198-205, News Orleans, October 1996.
V. Varavithya and P. Mohapatra, "A Multicast Routing Algorithm for Wormhole Routed Two - Dimensional Meshes," the Fifth Midwest Electrotechnology Conference, Ames, IA, 1996.
V. Varavithya, J. Upadhyay, and P. Mohapatra, "An Efficient Fault-Tolerant Routing Scheme for Two - Dimensional Meshes," in Proceeding of the International Conference of High Performance Computing, New Delhi, India, pp. 773-778, December 1995.
J. Upadhyay, V. Varavithya, and P. Mohapatra, "Routing Algorithms for Torus Networks," in Proceeding of the International Conference of High Performance Computing, New Delhi, India, pp. 743-748, December 1995.
J. Upadhyay, V. Varavithya, and P. Mohapatra, "Efficient and Balanced Adaptive Routing in Two Dimensional Meshes," IEEE International Symposium on High Performance Computer Architecture, Raleigh, North Carolina, pp. 112-121, January 1995.
Theses
V. Varavithya, Multicasting in Wormhole Routed Multicomputers , Ph.D. Thesis, Department of Electrical and Computer Engineering, Iowa State University, 1998.
V. Varavithya, Adaptive Routing for Mesh Interconnection Networks, Master's Thesis, Iowa State University, 1994.
