Mr. Sebastian Reyalt Gnanapragasam

Senior Lecturer Grade II

Mathematics and Computer Science
Faculty of Natural Sciences
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Contact:

Central Campus, 334, 3rd Floor, S & T Building, The Open University of Sri Lanka, Nawala, Nugegoda

Office: 112881443, Ext: 443

Email: srgna@ou.ac.lk sreyaltg@gmail.com


I graduated (B.Sc Special in Mathematics) from the Faculty of Science, University of Peradeniya with second class upper division in the year 2005. ThenI received my Master of Science degree specialized in Applied Statistics from the University of Peradeniya in the year 2012. Also I received the Master of Science degree in Opeerational Research from the University of Moratuwa in the year 2016. I Joint to the Department of Mathematics and Computer Science, Faculty of Natural Sciences, the Open University of Sri Lanka as a Lecturer (Probationary) in September 2008. I worked as a temporary lecturer in the Department of Mathematics, University of Peradeniya form 2005 to 2007 and thereafter I worked as a temporary instructor in the Department of Engineering Mathematics, University of Peradeniya till 2008.

Area of Specification:

Discrete Mathematics

Research Intrests:

Combinatorial Mathematics, Graph Theory, Time Series

Affiliations:

The Open University of Sri Lanka

Course Coordination:

PEU5304- Introduction to Complex Analysis, PUU3141- Algebra of Complex Numbers, PEU5302/ PUU3242- Combinatorics, PEU5305/ PUU3245- Complex Analysis I

Awards:

Best oral presentation in 'Science, Engineering & Technology' discipline at the International Conference on Multidisciplinary Approaches- 2016

Researches:

Gnanapragasam, S. R. (2018). Outbreaks of Leptospirosis in selected districts of Sri Lanka, International Journal of Academic Research and Development, Vol 3(6), p. 27-32.

Gnanapragasam, S. R. (2018).Tourist Arrivals in Sri Lanka: A Comparative Study of Holt-Winter's versus Box-Jenkin's Modeling Methods, OUSL Journal, Vol 13(1), p. 65-91.

Gnanapragasam, S. R. (2017). An Empirical Study on Human Leptospirosis Cases in the Western Province of Sri Lanka, OUSL Journal, Vol 12(1), p. 109-127.

Gnanapragasam, S. R. (2017). Modeling seasonal Leptospirosis cases in Western province of Sri Lanka, Proceedings of 4th Ruhuna International Science and Technology Conference (RISTCON 2017), p.37.

Gnanapragasam, S. R. Cooray, T. M. J. A. Dissanayake, R. (2016). Prediction of international tourist arrivals to Sri Lanka using state space modeling method: An empirical study after the civil war, Proceedings in Medical, Allied Health, Basic an Applied Sciences, 9th International Research Conference- KDU, Sri Lanka, p. 50-55.

Gnanapragasam, S. R. Cooray, T. M. J. A. (2016). Forecasting Post-War Tourist Arrivals to Sri Lanka using Dynamic Transfer Function method, International Journal of Multidisciplinary Studies (IJSM), Vol 3(2), p. 111-122

Gnanapragasam, S. R. Cooray, T. M. J. A.  (2016). Tourist Arrivals after the Internal Conflict in Sri Lanka: A Time Series Analysis using Holt- Winter’s method, Proceedings of Open University Research Sessions (OURS2016), p.59.

Gnanapragasam, S. R. Cooray, T. M. J. A. (2016). Forecasting Post-War Tourist Arrivals to Sri Lanka using Dynamic Transfer Function method, Proceedings of 3rd International Conference on Multidisciplinary Approaches (iCMA 2016), p.88.

Gnanapragasam, S. R. Cooray, T. M. J. A. Dissanayake, R. (2016). Prediction of international tourist arrivals to Sri Lanka using state space modeling method: An empirical study after the civil war, Proceedings of 9th International Research Conference on Professional Integration for a Secure Nation, p. 202.

Gnanapragasam, S. R. (2016). Classification of Districts in Sri Lanka based on cost of living: A multivariate approach, Proceedings of Wayamba International Conference (WinC2016), p. 18                                  

Gnanapragasam, S. R. Cooray, T. M. J. A. (2016). An empirical analysis of forecasting international tourist arrivals to Sri Lanka by using Box-Jenkin’s method: A postwar perspective, Proceedings of Wayamba International Conference (WinC2016), p.19                                                                      

Gnanapragasam, S. R. Cooray, T. M. J. A. (2016). Prediction of Dengue Fever Cases in Sri Lanka using Time Series Analysis, Proceedings of 3rd Ruhuna International Science and Technology Conference (RISTCON 2016), p. 35.

Gnanapragasam, S. R. Cooray, T. M. J. A. (2015). Time Series Models to Forecast Dengue Fever Incidences in Western Province of Sri Lanka, Proceedings of 8th International Research Conference on Inculcating Professionalism for National Development, p. 46-52.

Gnanapragasam, S. R. Perera, K. (2013). Fitting generalized lambda distribution to the difference of spatial elevations data in Sri Lanka, Proceedings of Annual Academic Sessions 2013, The Open University of Sri Lanka, p. 194-197.

Gnanapragasam, S. R. Perera, K.  Ratnayake, U. R. (2012). Statistical model to predict contour elevation using shuttle radar topographic mission digital elevation data, Proceedings of the 2nd International Conference on Sustainable Built Environment (ICSBE 2012), p. 197.

 

Research projects

Time Series Forecasting of Post-War Tourism Prospects for Sri Lanka

(Partial fulfillment for M. Sc in Operational Research)

(Supervisor: Mr. T. M. J. A. Cooray, Senior Lecturer, Faculty of Engineering, University of Moratuwa, Sri Lanka.)

 

Statistical Modeling of Topographic Elevation Using Shuttle  Radar Topography Mission Digital Elevation Data

 (Partial fulfillment for M. Sc in Applied Statistics)

(Supervisors: Dr. K. Perera, Dr. U. R. Ratnayake, Senior Lecturers, Faculty of Engineering, University of Peradeniya, Sri Lanka.)

Publications:

GnanapragasamS. R. (2010). Assessments in Open and Distance Learning Methodology, Learner- Centered Teaching Methodology & Technology to Assess Students, Staff Development Center, Wayamba University of Sri Lanka, p. 76-101.

 

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