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Prof. N G J Dias
B.Sc.(Colombo), M.Sc. (Belfast, UK), Ph.D. (Wales, UK), MBCS

Present Position: Professor

Room Location: A5 106

Phone: +94(011) 2903375, Intercom : 375

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Research Interests:

Algorithms, Theoretical Computer Science, Computer Networks and Internet Systems Development, NLP

Teaching :

  1. Data Structures and Algorithms
  2. Intelligent Knowledge Based Systems
  3. Computer Graphics
  4. Data Communication and Networks
  5. Computer Architecture and Design
  6. Multimedia Systems Development
  7. Data Security
  8. Formal Methods and Software Verification
  9. Deductive Reasoning and Logic Programming
  10. Theory of Computability and Complexity

Publications :

Papers in Refereed Journals

  1. B. M. Brown and N.G.J. Dias, The HELP type integral inequalities for 2nth order differential operators, International Series of Numerical Mathematics, 1997, Vol. 123, p 179-192.
  2. M. Benammar, C. Bennewitz, M. J. Beynon, B. M. Brown, N.G.J. Dias, W. D. Evans, W. N. Everitt, V. G. Kirby and L. L. Littlejohn, A Catalogue of HELP and HELP-type Integral and series Inequalities, Recent Progress in Inequalities: Mathematics and Its Applications, 1998, Vol. 430, p 127-160.
  3. K. H. Kumara, N.G.J. Dias and H. Sirisena, 2007, Automatic segmentation of given set of Sinhala text into syllables for speech synthesis, Journal of Science of University of Kelaniya, 2007, p 53-62.
  4. R. I. P. Wickramasinghe, K. H. Kumara and N. G. J. Dias, 2007, Practical issues in the development of TTS and SR for the Sinhala language, Journal of Science of University of Kelaniya, 2007, p 63-72.
  5. K. H. Kumara and N.G.J. Dias, 2008, An alternative approach for Sinhala speech synthesis, Proceedings of the 4th International Student Conference on Innovations at Ibaraki University Japan, p 190-193.
  6. P.G.N. Priyadarshani and N.G.J. Dias, 2010, Mel Frequency Ceptral Coefficients and Vector Quantization for Speaker Identification, ICTer2010 Conference Proceedings, ISBN: 978-1-4244-9039-4, IEEE Catalog Number: CFP1086L-PRT, p 24.
  7. P. G. N. Priyadarshani and N. G. J. Dias, 2011, Automatic Segmentation of Separately Pronounced Sinhala words into Syllables, Journal of Science of University of Kelaniya, Vol. 6, 2011, p 35-44.
  8. M.K.D.K. Piyaratne, N. G. J. Dias and N.S.B.M. Attapattu, 2012, Linear Model Based Software Approach with Ideal Amino Acid Profiles for Least-cost Poultry Ration Formulation, Information Technology Journal, Vol. 11, Issue 7: 788-793, ISSN 1812-5638. Publisher: Asian Network for Scientific Information.
  9. P. G. N. Priyadarshani, N. G. J. Dias and Amal Punchihewa, 2012, Dynamic Time Warping Based Speech Recognition for Isolated Sinhala Words, 55th International Midwest Symposium on Circuits and systems (IEEE MWSCAS 2012) Proceedings, ISSN 978-1-4673-2527-1, p892-895.
  10. P. G. N. Priyadarshani, N. G. J. Dias and Amal Punchihewa, 2012, Genetic Algorithm Approach for Sinhala Speech Recognition, 55th International Midwest Symposium on Circuits and systems (IEEE MWSCAS 2012) Proceedings, ISSN 978-1-4673-2527-1, p896-899.
  11. W. A. C. Weerakoon, A. S. Karunanada and N. G. J. Dias, Modeling Memory as Conditional Phenomena for a New Theory of Computing, Proceedings of the 9th Annual Sessions 2012 , Sri Lanka Association for Artificial Intelligence (ALAAI).
  12. Weerakoon W. A. C., Karunanda A. S. and N. G. J. Dias (2013), A Tactics Memory for a New Theory of Computing, The 8th International Conference on Computer Science & Education (ICCSE 2013),  ISBN: 978-1-4673-4462-3, IEEE Catalog Number: CFP1389F-CDR, SaB1.1, pp. 153-158, April 26-28, 2013, Colombo, Sri Lanka.

Abstracts

  1. R. I. P. Wickramasinghe and N.G.J. Dias, Translation of computer algorithms into Pascal programs, Proceedings of the Annual Research Symposium 2004, FGS -University of Kelaniya, p 63.
  2. K. H. Kumara and N.G.J. Dias, Sinhala Numeric Reader: An interactive software to convert a given number into strings with synthetic sounds, Proceedings of the Annual Research Symposium 2004, FGS - University of Kelaniya, p 64.
  3. R. I. P. Wickramasinghe, K. H. Kumara and N.G.J. Dias, An Interactive Sinhala medium courseware for teaching secondary school Statistics, Proceedings of the Annual Research Symposium 2005, FGS - University of Kelaniya, p 80.
  4. R. I. P. Wickramasinghe, K. H. Kumara and N.G.J. Dias, Translation of a given simple English sentence into its equivalent Sinhala using a Speech Synthasizer, 10th International conference on Sri Lanka Studies, 2005, p 96.
  5. K. H. Kumara, L. Munasinghe, K. D. jayasuriya, N.G.J. Dias, C. H. de Silva and S. R. D. Kalingamudali, Design and implementation of a Web-based Faculty Information System, Proceedings of the Annual Research Symposium 2006, FGS - University of Kelaniya, p 66.
  6. K. H. Kumara, N.G.J. Dias and H. Sirisena, A tool for automatic segmentation of a given Sinhala text into Syllables for Speech synthesis and Speech recognition, Proceedings of the Annual Research Symposium 2006, FGS - University of Kelaniya, p 67.
  7. K. H. Kumara, N.G.J. Dias and R. I. P. Wickramasinghe, MBROLA Formatted Diphone Database for Sinhala Language, Proceedings of the Annual Research Symposium 2007, FGS - University of Kelaniya, p 137.
  8. K. H. Kumara and N.G.J. Dias, 2008, A Basic Unit for Sinhala Speech Synthesis, Proceedings of the Second International Symposium, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka, p 184.
  9. Nalin Warnajith, Sihan Wijewickrama, N.G.J. Dias, 2008, Gamunu Dassanayake and Satoru Ozawa, The use of templates to manage on-line Discussion Forums, Proceedings of the 4th International Student Conference on Innovations at Ibaraki University Japan, p 264.
  10. Gamunu Dassanayake, Ravindra Jayasekera, Vaise Patu, N.G.J. Dias, Sandun Fernando, Sihan Wijewickrama, Nalin Warnajith, Atsushi Minato and Sataru Ozawa, 2008, Teaching using information and communication technology: Do University and High school teachers have the confidence? – A case study from Sri Lanka, Proceedings of the 4th International Student Conference on Innovations at Ibaraki University Japan, p 265.
  11. M. K. D. K. Piyaratne, N.G.J. Dias and M. Attapattu, 2008, Development of a Linear-model based Computer Software foe Least Cost Poultry ration formulation, Annual Research Symposium 2008, FGS - University of Kelaniya.
  12. A. J. P. M. P. Jayaweera and N.G.J. Dias, Interactive communication platform, Annual Research Symposium 2008, FGS - University of Kelaniya.
  13. A. V. L. Chandima and N.G.J. Dias, 2008, An inventory control system with intelligent demand forecasting facility, Annual Research Symposium 2008, FGS - University of Kelaniya
  14. K.H.Kumara and N.G.J.Dias, 2009, A tool for automatic derivation of phone transitions for the crearion of a diphone database for Sinhala Text to Speech Synthasis, Annual Research Symposium 2009, FGS - University of Kelaniya, p 122
  15. P.G.N.Priyadarshani and N.G.J.Dias, 2009, A study on Linux Live CD Re-mastering, Annual Research Symposium 2009, FGS- University Of Kelaniya, p 120
  16. N.G.J.Dias and P.L.U.A.Rathnasekara, 2009, Design and Implementation of an efficient SMS server, Annual Research Symposium 2009, FGS -University of Kelaniya, p 124
  17. N.G.J.Dias, K.H.Kumara and D.D.M.Dolawaththa, 2009, An analysis of sound parameters for prosodic modeling in Sinhala Text-to-Speech synthesis, Annual Research Symposium 2009, FGS - University of Kelaniya, p 126
  18. D.D.M.Dolawaththa and N.G.J.Dias, 2009, Design and Implementation of new Computer Software for the Centre for Open and Distance learning, Annual Research Symposium 2009, FGS - University of Kelaniya, p 125
  19. P.G.N.Priyadarshani and N.G.J.Dias, MFCC Based Text-Dependent Speaker Identification Using Vector Quantization, 12th International Conference on Sri Lanka Studies 2010, p 240.
  20. N.G.J.Dias and P.L.A.U.Rathnasekara, An efficient short message service (SMS) server, 12th International Conference on Sri Lanka Studies 2010, p 250.
  21. D.D.M. Dolawatta, N.G.J.Dias and K.H.Kumara , A Study of Prosodic features of folk poems in Sinhala, 12th International Conference on Sri Lanka Studies 2010, p 266.
  22. D.D.M.Dolawaththa, N.G.J.Dias and K.H.Kumara 2010, Classification and Regression Trees (CART) based Data Driven Approach for Prosody Duration Modeling in Sinhala Language, Annual Research Symposium 2010, FGS - University of Kelaniya
  23. P.G.N. Priyadarshani and N.G.J. Dias, 2010, Dynamic Time Warping Based Speech Recognition for Isolated Sinhala Words, Annual Research Symposium 2010, FGS - University of Kelaniya.
  24. P.G.N.Priyadarshani and N.G.J.Dias, Genetic Algorithm Approach for Sinhala Speech Recognition,Annual Research Symposium 2011, FGS -University of Kelaniya, p 128.
  25. A. J. P. M. P. Jayaweera and N. G. J. Dias, Part of Speech (POS) tagger for Sinhala Language, Annual Research Symposium 2011, FGS - University of Kelaniya, p 81.
  26. A. J. P. M. P. Jayaweera and N. G. J. Dias, Evaluation of Stochastic Based Tagging Approach for Sinhala Language, Annual Research Symposium 2012, FGS - University of Kelaniya, p 77.
  27. A. M. D. Chandrasena and N. G. J. Dias, An Android Application in Searching Hospitals, Annual Research Symposium 2012, FGS - University of Kelaniya, p 27.
  28. K. K. D. P. C. Alexander and N. G. J. Dias, A Plug-in for Joomla which plays Videos and Audios without External Links, Annual Research Symposium 2012, FGS - University of Kelaniya, p 14.
  29. W. G. D. M. Samankula and N. G. J. Dias, 2013, Designing an automated speech recognition system to recognize frequently used words in Sinhala, 2nd International Conference on Social Sciences (ICSS 2013), November 22-23, 2013, University of Kelaniya, Sri Lanka, p 55.
  30. R. P. T. H. Gunasekera, N. G. J. Dias and M. C. Wijegunasekara, 2013, Performance of k-mean data mining algorithm with the use of WEKA-parallel, Annual Research Symposium 2013, FGS - University of Kelaniya, p 90-91.
  31. W. G. D. M. Samankula and N. G. J. Dias, 2013, Designing an Automatic Speech Recognition System to recognize frequently used sentences in Sinhala, Annual Research Symposium 2013, FGS - University of Kelaniya, p 62.

 

Books and Chapters of Books

  1. ISBN : 978-955-30-0335-5.
  2. Statics - I , Sadeepa Publishing House, 2009, ISBN : 978-955-661-346-9.
  3. Chapter 6 - Relational Algebra, Information Systems in Computer Science - Student Notes, 5th Working Party in Computer Science under Ruhuna-Keele link Progamme, 1988, p 113 – 139.
  4. Chapter 4 – Search Trees and the Prolog Search Strategy, Student Notes on Intelligent Knowledge Based Systems - Part I : Introduction to Prolog, 6th Working Party in Computer Science under Ruhuna-Keele link Progamme, 1989, p 37 – 46.
  5. Chapter 8 – Prolog and Logic, Student Notes on Intelligent Knowledge Based Systems - Part II : Applications of Prolog to IKBS, 6th Working Party in Computer Science under Ruhuna-Keele link Progamme, 1989, p 145 – 170.
  6. Solutions for Part 2 Chapter 8, Tutor Notes on Intelligent Knowledge Based Systems - Part I : Introduction to Prolog, 6th Working Party in Computer Science under Ruhuna-Keele link Progamme, 1989, p 44 – 52.
  7. Chapter 3 – Information Systems, General Information Technology (GIT) – Supplementary Material to Teacher Resource Guide, Prepared by a Working group under the IT Advisory Group of the Ministry of Education, 2004, p 82 - 90

Poster Presentation

  1. P.G.N. Priyadarshani, N.G.J. Dias and H.Sirisena, 2010,Automatic Syllabification of Acoustic signals in Sinhala Words, ICTer2010 Conference Proceedings, ISBN: 978-1-4244-9039-4, IEEE Catalog Number: CFP1086L-PRT.
  2. D. S. L. U. Ratnayake and N. G. J. Dias, Live Coverage over Wireless Ad-hoc Networks, Annual Research Symposium 2012, FGS - University of Kelaniya, p 127-128.
  3. K. D. T. Shanika and N. G. J. Dias, The use of Artificial Neural Network for the Prediction of Particular Subject marks of final Examination, Annual Research Symposium 2012, FGS - University of Kelaniya, p 137-138.

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