• D. Roy, D. Saruhashi, T. Maeda, S. Yamada and M. Iwahara, “Effect of Flux- Concentration on the Performance of a Linear Induction Motor”, Journal of the Magnetics Society of Japan, Vol. 24, No. 4-2, 2000, pp. 963-966.
• D. Roy, Y. Akiyama, S. Yamada, M. Iwahara and B. Basak, “Performance Estimation of a Flux-Concentration Type Linear Induction Motor Using Three-Phase Equivalent Circuit Parameters”, Transactions of the Magnetics Society of Japan, Vol. 2, No. 1, 2002, pp. 11-14.
• D. Roy, Y. Akiyama, S. Yamada, M. Iwahara and B. Basak, “Performance Prediction of a Tubular Linear Induction Motor Utilizing the Effect of Flux-Concentration by Eddy Currents”, Journal of the Japan Society of Applied Electromagnetics and Mechanics, Vol. 10, No. 1, 2002, pp. 53-58.
• K. Abe, H. Iguchi, H. Tian and D. Roy, “Recognition of Plural Grouping Patterns in Trademarks for CBIR According to the Gestalt Psychology”, IEICE Transactions on Information and Systems, Vol. E89-D, No. 6, June 2006, pp. 1798-1805.
• D. Roy, S. C. Mukhopadhyay, S. K. Pal and S. Bose, “Software Aided Derating and Performance Prediction of Cage-Rotor Induction Motor Under Distorted Supply Conditions”, Proceedings of IEEE PEDES Conference, New Delhi, January 8-11, 1996, Vol. 1, pp. 452-457.
• D. Roy, S. C. Mukhopadhyay, S. K. Pal and S. Bose, “Novel Thermal Model Aided Motor Derating Under Waveform Distortion”, Proceedings of the PEDS Conference, Singapore, May 26-29, 1997, pp. 829-833.
• D. Roy, D. Saruhashi, S. Yamada and M. Iwahara, “Fabrication and Development of a Novel Flux-Concentration Type Linear Induction Motor”, Digest of the 2000 IEEE International Magnetics Conference, Toronto, Ontario, Canada, April 9-13, 2000, Paper No. CR-11.
• D. Roy, A. Fujiyoshi, S. Yamada and M. Iwahara, “Field Distribution of a Flux-Concentration Type Linear Induction Motor”, Proceeding of the 8th Joint MMM-Intermag Conference, San Antonio, Texas, U.S.A., January 7-11, 2001, Paper No. CQ-10, p. 179.
• D. Roy, Y. Akiyama, S. Yamada and M. Iwahara, “Development and Performance of a Linear Induction Motor Based on the Effect of Flux-Concentration by Eddy Currents”, Proceeding of the 10th International Symposium on Applied Electromagnetics and Mechanics, Tokyo, Japan, May 13-16, 2001, pp. 559-560.
• D. Roy, Y. Akiyama, S. Yamada, M. Iwahara and B. Basak, “Comparative Studies of Flux-Concentration Type and Normal Type Tubular Linear Induction Motor”, Proceeding of the Third International Symposium on Linear Drives for Industry Applications, Nagano, Japan, October 17-19, 2001, pp. 21-24.
• D. Roy, D. Saruhashi, T. Maeda, S. Yamada and M. Iwahara, “Effect of Flux- Concentration on the Performance of a Linear Induction Motor”, Proceeding of the 23rd Conference of the Magnetics Society of Japan, Kyushu, Japan, October 5-8, 1999, Paper No. 8pD-4, p. 493.
• D. Roy, D. Saruhashi, A. Fujiyoshi, S. Yamada and M. Iwahara, “Studies of Linear Induction Motor Based on Flux-Concentration Effect”, 2000 National Convention of the Institute of Electrical Engineers of Japan, March 21-24, 2000, Paper No. 2-161.
• D. Roy, S. Yamada and M. Iwahara, “Design and Development of a Linear Induction Motor Utilizing the Effect of Flux-Concentration”, IEEJ paper (Technical Report) of the Technical Meeting on Magnetics and Linear Drives, MAG-00-227, LD-00-92, Kanazawa, Japan, November 7-8, 2000, pp. 1-6.
• Y. Akiyama, D. Roy, S. Yamada and M. Iwahara, “Moving-Stator Type Linear Induction Motor Utilizing the Effect of Flux-Concentration”, Proceeding of the Technical Conference by Students, Toyama, Japan, March 10, 2001, p.10 (in Japanese).
• D. Roy, Y. Akiyama, S. Yamada, M. Iwahara and B. Basak, “Performance Prediction of a Tubular Linear Induction Motor Utilizing the Effect of Flux-Concentration by Eddy Currents”, Proceeding of the 10th MAGDA Conference, Iwate University, Iwate, Japan, April 13-14, 2001, pp. 95-98.
• D. Roy, Y. Akiyama, S. Yamada and M. Iwahara, “Moving-Stator Type Tubular Linear Induction Motor Based on the Effect of Flux-Concentration”, Proceeding of the 13th Symposium on Electromagnetics and Dynamics, Chiba, Japan, June 21-23, 2001, pp. 149-152.
• D. Roy, Y. Akiyama, S. Yamada, M. Iwahara and B. Basak, “Performance Prediction of a Flux-Concentration Type Linear Induction Motor Using Three-Phase Equivalent Circuit Parameters”, Proceeding of the 25th Conference of the Magnetics Society of Japan, Akita, Japan, September 25-28, 2001, Paper No. 27aD-2, p. 294.
• Y. Akiyama, D. Roy, S. Yamada and M. Iwahara, “Performance Analysis of a Flux-Concentration Type Linear Induction Motor Using Three-Phase Equivalent Circuit”, IEEJ paper (Technical Report) of the Technical Meeting on Magnetics and Linear Drives, MAG-01-148, LD-01-76, Toyama, Japan, November 12-13, 2001, pp. 7-12 (in Japanese).
• D. Roy, Y. Akiyama, S. Yamada and M. Iwahara, “Performance Comparison of a Flux-Concentration Type Tubular Linear Induction Motor Using Three-Phase Equivalent Circuit Parameters”, Proceeding of the Second Japan Australia New Zealand Joint Seminar, Kanazawa, Japan, January 24-25, 2002, pp. 171-179.
• Y. Akiyama, D. Roy, H. Toyama, S. Yamada and M. Iwahara, “Performance Characteristics of a Linear Induction Motor including Flux-Concentration Effect”, Proceeding of the 14th Symposium on Electromagnetics and Dynamics, Okayama , Japan, May 22-24, 2002, pp. 659-662.
• S. P. Ray, D. Roy, D. Ghosh and P. K. Mukherjee, “Surface Current Simulation Method: A Computational Tool for Study of Two-Dimensional Magnetic Field”, Abstracts of the Second Japan Australia New Zealand Joint Seminar, Kanazawa, Japan, January 24-25, 2002, Paper No. 9-3.
• D. Roy, M. Iwahara and S. Yamada, “A scope of telemedicine and its telecommunication lines in India” Proceedings of the Joint Conference of Hokuriku Chapters of Institutes of Electrical Engineers, Japan, 2003, E-76, p.287.
• D. Roy, M. Iwahara and S. Yamada “A consideration on the throughput performance of telecommunication under the IPv6 environment for telemedicine” Proceedings of the Joint Conference of Hokuriku Chapters of Institutes of Electrical Engineers, Japan, 2003, E-74, p.285.
• M. Iwahara, D. Roy, O. Matsui, N. Tonami, H. Bunko, K. Kojima, Y. Kikuchi, M. Suzuki, M. Itakura, I. Nagano, H. Hashimoto, T. Yoshimoto, M. Syako and T. Matsumoto, “A Telemedicine System on the Broad Band Network and Some Aspects of Throughput in the IPv4 and IPv6 Network Environments”, Digest Book of the Third Japan-Australia-New Zealand Joint Seminar, Auckland, New Zealand, January 22-23, 2004, p.64.
• H. Toyama, S. Yamada, M. Iwahara, D. Roy and K. Miya, “Eddy-current testing for a thick SUS plate”, Proceeding of the Third Japan-Australia-New Zealand Joint Seminar, Auckland, New Zealand, January 22-23, 2004, pp. 223-229.
• Koji Abe, Debabrata Roy, and John P. Eakins, “Recognition of Grouping Areas in Trademarks Considering Proximity and Shape Similarity”, Proceeding of the 8th International Conference on Knowledge-based Intelligent Information and Engineering Systems, LNAI 3213, Springer-Verlag, pp. 614-619, Wellington, New Zealand, September 2004.
• K. Abe, Y. Daido, H. Iguchi, H. Tian and D. Roy, “Recognition of Grouping Areas in Trademarks According to Gestalt Psychology Using Mahalanobis Distance”, Proceeding of the IASTED International Conference on Human-Computer Interaction, Phoenix, Arizona, USA, November 14-16, 2005, pp. 167-172.
• 24.A. B. Choudhury, D. Roy, A. Chakrabarti and K. Abe, “ Simulation Results of a Parallel Biased Magnetic Fault Current Limiter Using a Transient Model for Low Voltage Applications”, International Seminar on Power Transmission Research Interests and Challenges, Power Systems Division, Central Power Research Institute, Bangalore, India, December 20-22, 2005, p. 41.
• Exchange Meeting of Fellowship Researchers
  D. Roy, “Some aspects of telemedicine in India and throughput performance of telecommunication under the IPv6 environment”, Resumes for Presentations, Exchange Meeting of the Fellowship Researchers of Telecommunications Advancement Organization of Japan (TAO), January 30, 2004, Tokyo, Japan

Courses Undertaken

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Department of Electrical Engineering , BESU, Shibpur - 7111 03, INDIA