my-profile
Contact
0779895342
sarath.p@sliit.lk
Prof. Sarath Peiris
Head | Department of Mathematics and Statistics
Faculty of Humanities & Sciences | Department of Mathematics and Statistics
Career Summary
As the Head of the Department of Mathematics Department, my main desire is to provide the best service to the students who follow Mathematics and Statistics modules offered by the department and this, in order to get a better recognition for the Department.
Before I joined SLIIT, I was the Senior Professor in Applied Statistics at the University of Moratuwa (UoM), until I retired on 30th September 2020 and thereafter was a visiting lecturer at UoM. I joined the UoM as a Senior Lecturer Grade I and was promoted to Professor and Senior Professor during my 14 years’ service and was the Head of Mathematics Department, Faculty of Engineering, UoM from 2011-2017. Before I joined UoM, I served 25 years at the Coconut Research Institutes (CRI), Lunuwila, as a Statistician, Senior Statistician, Principal Statistician and finally the Head of the Statistics Division ( 2001-2007). I have significantly contributed to the CRI and to the Department of Mathematics of the University of Moratuwa.
I was a commonwealth scholar to New Zealand in 1984 and a Rothermated scholar to UK in 1996. I received the President’s Award for Scientific Publications in four years.
I was a visiting professor in the Department of Mathematics & Statistics at the University of Maryland, Baltimore Country, USA, Department of Statistics, National Chengchi University, Taiwan, and Department of Statistics, University of Connecticut, USA.
I am a Fellow of the Royal Statistics Soceity in the UK and a Fellow of the Institute of Applied Statistics Sri Lanka (IASSL). I was the President of the IASSL in 2014 and I have been a member of the Executive Council since 2011. My research areas are Multivaraite Statistics, Regression Modelling, Time Series Modelling, and Climate Change Analysis. I have supervised 3 Ph. D.s and nine M. Phils in addition to about 50 M. Sc. students.
I have made a significant contribution to popularizing applied statistics at the Faculty of Engineering of the University of Moratuwa. I have more than 35 years of post qualifying experince in statistical advisory/consultancy and made an impact in Sri Lanka in the field of Applied Statistics. I have published around 50 research papers in international and national refereed journals, and around 50 conference proceedings both locally and internationlly.
Carrer Development
Dept. of Engineering Mathematics, Faculty of Engineering, University of Peradeniya, Sri Lanka
- Temporary Instructor (Oct 1979 - Sep 1980)
Biometry Division, Coconut Research Institute (CRI, Lunuwila, Sri Lanka)
- Statistician (Oct 1980 - April 1986)
- Senior Statistician (May 1986 - Dec 1991)
- Principal Statistician (Jan 1992 - May 2004)
- Principal Statistician & Head, Biometry Division (Jun 2004 - Aug 2007)
Department of Mathematics, University of Moratuwa, Sri Lanka
- Senior Lecturer Grade I (Aug 2007 - Jan 2011)
- Professor in Applied Statistics (Jan 2011 – Jan 2019)
- Head, Dept. of Mathematics (Jun 2012 - June 2018)
- Senior Professor in Applied Statistics (Jan, 2019 to October 2020)
SLIIT
- · Professor and Head / Mathematics (01 Jan 2021 to date)
ACADEMIC QUALIFICATIONS
Educational Qualification
· B. Sc. (First Class Honours), University of Colombo, Sri Lanka - 1979
· M. Sc. (Statistics), University of Canterbury, New Zealand - 1985
· Ph. D. (Applied Statistics), University of Colombo, Sri Lanka – 1996
HONOURS AND AWARDS
* Commonwealth scholar to New Zealand in 1984
* Rothermated scholar to the Rothamsted Experimental Station (the Institute of Arable Crops Research), UK in 1996
* The President’s Award for Scientific Publications in four years (2003-2006)
*
Research Interests and Memberships
Research Interests
- · Data Mining Techniques in Multivaraite Statistics
- · Regression Modelling
- · Climate Change Analysis and Assessment
- · Time Series Forecasting
- · Teaching Statistics
Supervision of Research Students (Ph D/M Phil)
Completed : 3 - Ph Ds, and 9 - M Phils
Supervision of M. Sc. Projects for Taught Course (20 credits per project)
Completed: 49
On Going: 09
Memberships
Professional Qualification
Fellow of the Institute of Applied Statistics Sri Lanka (IASSL) since 2016.
Fellow of Royal Statistics Society (FRSS), UK since 2010.
Ongoing Research
The Use of Fractionally Autoregressive Integrated Moving Average for the Rainfall Forecasting. Springer Nature Switzerland , V Kreinovich et. al. (Eds), ECONVN, SCI 809, 567-580.
3) Silva, H P T N, Dissanayake, G S and Peiris T S G (2019). Modeling Persistent and Periodic Weekly Rainfall in an Environment of an Emerging Sri Lankan Economy. Springer Nature Switzerland , V Kreinovich et. al. (Eds), ECONVN, SCI 808, 314-328.
4) Silva, H P T N and Peiris T S G (2018). Accurate Confidence Interval for Weibull Percentiles Using Bootstrap Calibration: A case study from weekly rainfall in Sri Lanka. International Journal of Ecological Economics and Statistics. 39(3), 67-76.
5) Sameera Senanayake, Nalika Gunawardena, Paba Palihawadana, Sanjeewa Kularatna and Peiris, T S G (2017). Validity and reliability of the Sri Lankan version of the Kidney Disease Quality of Life Questionnaire (KDQOL-SF™), Journal of Health and Quality of Life Outcomes, 15,119, 1-9
6) Silva, H P T N and Peiris T S G (2017). Analysis of Weekly Rainfall using Percentile Bootstrap Approach. International Journal of Ecology and Development, 32(3), 97-107.
7) Nanayakkara, K A D S A and Peiris, T S G (2017). Influence of Mathematics on Academic Performance of Engineering Students: PLS-SEM Approach. Communication in Statistics Case Studies and Data Analysis.
8) Peiris, T S G and Nanayakkara, K. A. D. S. A. (2017). Application of Adjusted Canonical Correlation Analysis (ACCA) to study the association between mathematics in Level 1 and Level 2 and performance of engineering disciplines in Level 2. Journal of Physics: Conference Series 890 012092, 1-12.
9) Attanayake, A M C H, Jayasundara, D D M and Peiris, T S G (2016). An Application of 5-Fold Cross validation on a Binary Logistic Regression Model. Advances & Applications in Statistics. 49(6), 443-461.
10) Nanyakkara K. A. D. S. A. and Peiris, T. S. G. (2016). Impact of Mathematics in Level 1 on the Academic Performance of Engineering Students: A Case Study. International Journal of Applied Statistics and Statistical Sciences, 5(4), 1 -8.
11) Nanayakkara K A D S A and Peiris, T. S. G. (2016). Application of Canonical Correlation Analysis to Study the Influence of Mathematics on Engineering Programs. Proceedings of the ERU Symposium, University of Moratuwa, IEEE (978-1-5090-0645.
12) Razmy A. M. & Peiris T. S. G. (2014). Comparison of Rectangular and Elliptical Control Region EWMA Schemes for Joint Quality Monitoring, Open Journal of Statistics, 4 (11), 970 -976.
13) Yadharshny Sivapragasam, and Peiris T. S. G. (2014). Factors Effecting on Internet Banking Adoption: A Case Study. Asian Journal of Business and Management (AJBM), Vol.2(4), 232-239.
14) Razmy, A. M. and Peiris, T. S. G. (2013). Design of Expoenetially Weighted Moving Average Chart for Monitoring Standardized Process Variance. International Journal of Engineering and Technology. Vol 13 , 74-78.
15) Mathugama S. C. and Peiris T. S. G. (2012). Spatial and Temporal Analysis of Critical Dry Spells in Sri Lanka. The International J of Climate Change: Impacts and Responses. International Journal of Climate Change: Impacts and Response. 3(3): 71-88.
16) Mathugama S. C. and Peiris T. S. G. (2011). Critical Evaluation of Dry Spell Research. International J of Basic and Applied Sciences, 11 (6), 153-160.
17) Peiris, T. S. G., Hansen, J. W. and Lareef, Zubair (2008). Use of seasonal climate information to predict coconut production in Sri Lanka. International. J of Climatology, 28: 103-10.
18)
19) Siriwardena, P. H. A., Fernando, L. C. P. and Peiris, T. S. G. (2005). A new method to estimate the population size of coconut mite on a coconut nut. J. of Experimental and Applied Acarology, Nertherlands. 37, 123-129.
20) Marikkar, J. M. N., H. M. Ghazali, Y.B. Che Man, Peiris, T. S. G. and O.M. Lai. (2005). Distinguishing lard from other animal fats in admixtures of some vegetable oils using liquid chromatographic data coupled with multivariate data analysis. Food Chemistry, 91, 5-14.
21) Marikkar, J. M. N., H. M. Ghazali, Y.B. Che Man, Peiris, T. S. G. and O.M. Lai. (2005). Use of gas liquid chromatography in combination with pancreatic lipolysis and multivariate data analysis techniques for identification of lard contamination in some vegetable oils Food Chemistry, 90, 23-30
22) Fernando, L.C.P., Aratchige, N. S., Peiris, T. S. G. (2003). Distribution patterns of coconut mite, Aceriaguerreronis and its predator Neoseiulusaff. paspalivorus in coconut palms. J. of Experimental and Applied Acarology. 31, 71-78.
23) Peiris, T. S. G. and Thattil, R. O. (1998). The study of climate effects on the nut yield of coconut using parsimonious models. J. of Experimental Agriculture, 34, 189-206.
24) Peiris, T. S. G., Thattil, R. O., and Mahindapala, R. (1995). An analysis of the effect of climate and weather on coconut (Cocosnucifera). J. of Experimental Agriculture, 31 (4), 451-460.
25) Peiris, T. S. G. (1993). Statistical analysis of field experiments in coconut using fewer recordings, J. of Experimental Agriculture. (29), 207-213.
Publications in Refereed non-indexed Journals (National and International
1) Jayathilake Amali and Peiris, T S G (2017). Modelling Aging Population in Sri Lanka. Cities People Places : An International Journal on Urban Environments. 2(2). 40-46
2) Dewappriya M A N, Dias, W P S and Peiris, T S G (2017). Modelling of Tsunami Intensity Using Artifical Neural Network and Fuzzy Inference System. International Journal of Scientific and Engineering Research, 8(6), 1-7.
3) Razmy, AM and Peiris, T. S. G. (2013). Design of Expoenetially Weighted Moving Average Scheme for Standardized Means. Sri Lanka Journal of Applied Statistics. Vol (14-2), 145-152.
4) Peiris, T. S. G. and Kularatne, J. D. J. S. (2008). Assessment of Climate Variability for Coconut and Other Crops: A Statistical Approach. International Journal of Coconut Research & Development (CORD). 24(1) 35-53
5) Kularatne, J. D. J. S., Peiris, T. S. G. and Samita, S. (2008). Impact of Covariate on Single Palm Plot Experiments in Coconut. International Journal of Coconut Research & Development (CORDCORD, 24(2), 10-20.
6) Cooray, T. M. J. A. and Peiris, T. S. G. (2008). Day and Night, Electricity Load Forecasting for Peaks Values in Sri Lanka. Sri Lanka Journal of Applied Statistics, 9, 121-131.
7) Wickramananda, I. R., Peiris, T. S. G., Neil Fernando, Fernando, L C P and Edgington, S. (2007). Impact of the coconut mite (AcerriaguerreronisKeifer) on the coconut industry in Sri Lanka. International J of Coconut R & D (Cord), Indonesia, 23(1), 1-16.
8) Peiris T. S. G., K. P. Waidayaratne,.Samita S. and R. O. Thattil (2007). Control of spatial effect due to neighboring palms in coconut (CocosNucifera). International Journal on Coconut R & D (CORD), 23(2), 46-57.
9) Pathirage Anuradha Niranji, D P. and Peiris, T. S. G. (2007). Integrated Time Series Model to Forecast Monthly Nut Price of Coconut. Sri Lankan Journal of Applied Statistics, 8, 83-94
10) Kularatne, J D J S, Peiris, T. S. G. and Samita S. (2006). Feasibility of single palm plot in coconut experimentation. Journal of Tropical Agricultural Research, 18, 55-62.
11) Waidyarathne K. P, Peiris T. S. G and Samita, S. (2006). Shift in onset of first inter monsoon rain in coconut growing areas in Sri Lanka. Journal of Tropical Agricultural Research, 18, 1-12.
12) Peiris, T. S. G. (2005). Spatial aggregation of multidisciplinary data. Sri Lankan J of Applied Statistics, 5, 29-50.
13) Peiris, T. S. G., Fernando, M . T. N. and Samarajeewa, S. (2004). Factors influencing the use of coconut oil by the householders in Sri Lanka and their policy relevance to popularize the consumption, International Journal of Coconut Research &Development(Cord), Indonesia. 20 (2), 12-20.
14) Piyasiri, C. H., Peiris, T. S. G. and Samita S. (2004). Change in rainfall and temperature of Low Country Wet Intermediate (IL1) Region of Sri Lanka. Journal of Tropical Agricultural Research, 16, 271-280.
15) Peiris, T. S. G., Peiris, T. U. S., and Rajapaksha, S. (2000). Prediction of annual national coconut production - a stochastic approach. Sri Lanka J of Applied Statistics, 1 (1), 25-32.
16) Peiris, T. U. S., Peiris, T. S. G., and Samita. S (2000). Arrival of south-west monsoon rains. Journal ofTropical Agricultural Research, 12, 265-275.
17) Peiris, T. S. G., Fernando, M. T. N. and Waidyanatha, U. P. de S (2001). Factors influencing the productivity of coconut estates. J. of Coconut Research and Development (Cord), Indonesia, 17(2), 36 – 48.
18) Peiris, T. S. G. and Thattil, R. O. (1997a). Assessment of the effects of environmental factors on yield of coconut. Cocos (Journal of the Coconut Research Institute, Sri Lanka) 12, 1-18.
19) Peiris, T. S. G. and Thattil, R. O. (1997b). Alternative methods to determine optimal plot size for perennial tree crops. Cocos, 12, 44-54.
20) Peiris, T. S. G. and Thattil, R. O. (1996). Application of agro climatology to some aspects of Coconut research. J. Plant. Crops (Supplement) in India, 24, 24-35.
21) Peiris, T. S. G. and Thattil, R. O. (1994). An alternative model to estimate solar radiation. Cocos , 10, 26-34.
22) Peiris, T. S. G. and Pieris, R. A. A. (1991). The effect of bimonthly rainfall on coconut yield in the Semi Dry Intermediate Zone (ILl) in Sri Lanka. Cocos, 9, 1-11.
23) Peiris, T. S. G. (1989). Forecasting the crop yield of a coconut estate. International J. of Coconut Research & Development (Cord), Indonesia 5(2), 67?77.
24) Peiris, T. S. G. and Senaviratne, E. K. (1989). An alternative approach for analysis of data from a long term experiment. Cocos, 7, 14-20.
25) Peiris, T. S. G. and Stern, R. D. (1988). Use of statistics package `SAS' in an agricultural research institute: a case study from CRI, Sri Lanka. Cocos.6, 38?52.
Presentations in Refereed Proceedings – Published as full paper/extended abstract
1) Peiris, T. S. G., & Nanayakkara, K. A. D. S. A. (2017). Application of Adjusted Canonical Correlation Analysis (ACCA) to study the association between mathematics in Level 1 and Level 2 and performance of engineering disciplines in Level 2. In International Conference on Applied & Industrial Mathematics and Statistics (ICoAIMS), August 2017, Malaysia
2) Silva, H.P.T.N and Peiris T.S.G. (2017). Statistical Modeling of Weekly Rainfall : A case Study in Colombo City in Sri Lanka, Proceedings of the 3rd Moratuwa Engineering Research Conference (MERCon), 29-31 May, Sri Lanka,241-246, IEEE
3) Nanayakkara, K. A. D. S. A., & Peiris, T. S. G. (2017). Identifying the Influence of Mathematics on Academic Performance of Engineering Students. In 3rd Moratuwa Engineering Research Conference (MERCon), 29-31 May, Sri Lanka, 247-252. IEEE.
4) Razmy A M and Peiris, T. S. G (2014). A Novel Joint Quality Monitoring Approach for Industrtial Application. Proceedings of the 1st Quality Symposium, Sri Lanka Standad Instituites, Colombo, 119-124.
5) Razmy A M and Peiris, T. S. G. (2013). Performance Comparison of Shewhart Joint Monitoring Schemes for Mean and Variance. Proceeding of the 19th National Engineering Conference, 19th ERU Symposium, Faculty of Engineering, University of Moratuwa, Sri Lanka. Vol. 19, 99 -104
6) Mathugama, S. C. And Peiris, T. S. G. (2012). Modelling Onset of Critical Dry Spells in DL2 Region in Dry Zone Sri Lanka. Proceedings of the 2nd Regional Conference on Applied and Engineering Mathematics. Penang, Malaysia.719-725.
7) Razmy, A. M. and Peiris, T. S. G. (2012). A standard Method to compare combined Quality Monitoring Schemes using Average Raw length. Proceeding of the 2nd International Symposium. South Eastern University of Sri Lanka, 172-173.
8) Mathugama C. S. and Peiris T. S. G. (2010) Forecasting critical dry spell lengths in Anamaduwa. Proceedings of the 16th Annual Symposium of the Faculty of Engineering, 240-241.
9) Waidyaratne, K. P., Peiris, T. S. G and Samita S. (2010). Significance Changes of Seasonal Rainfall in Coconut Growing Area in Sri Lanka. In Proceedings of the 3rd Symposium on Plantation Crop Research. - 214-223, (Eds: R S Dharmakeerthi and A M W K Senevitahna), 30 September-01 October, Cinnamon Garden Hotel, Colombo, Sri Lanka
10) Mathugama C. S. and Peiris T. S.. G (2009) .Forecasting Dry Spells in DL1 - A Case study from Anamaduwa. Proceedings of the 15th Annual Symposium of the Faculty of Engineering, 123-124.
11) Peiris, T. S. G. (2008) Impacts Assessment due to Climate Change on the Coconut Industry in Sri Lanka. Proceedings of the 14th Annual Symposium of the Faculty of Engineering, 24-25
12) Peiris, T. S. G. (2005). Role of statisticians towards disaster management in climate. 28-35 pp, Proceedings of the 6th Annual General Meeting of the Applied Statistics Association of Sri Lanka, Prof. V K Samaranayake Auditorium, University of Colombo, Colombo, Sri Lanka.
13) Peiris T. S. G. (2004). Forecasting coconut production: issues, approaches, and challenges. In Proceedings of the International Conference of Coconut Research Institute of Sri Lanka – Part I (Review papers and guest presentations), 111 – 147 (Eds: T S G Peiris and C S Ranasinghe). The Coconut Research Institute of Sri Lanka, Lunuwila 61150, Sri Lanka.
14) Piyasiri, C. H., Peiris, T. S. G and Samita S. (2004). Empirical prediction of maximum and minimum air temperature in Sri Lanka. In Proceedings of the International Statistical Conference: Visions of futuristic methodologies. 371-379, (Eds: Basil M de Silva and NitisMukhopadhyay), 28-30 December 2004, Postgraduate Institute of Science, University of Peradeniya, Sri Lanka.
15) Peiris T. S. G. and Mathes, D. T. (1997). The Analysis of long term rainfall variability at selected location in Sri Lanka. Proceedings of the International Congress on Modeling and Simulation, 06-11 December, 1997, Hobart, Australia. 69-74.
16) Peiris, T. S. G. (1993). The degree of influence of rainfall on coconut. Advances in coconut research and development, 413-420, (Eds. Nair, M. K., Khan, P. H., Gopalasundram, P. &BhaskaraRao, E. V. V.). Oxford & IBH Publishing Co. Pvt. Ltd.
Presentation at Conferences/Communications – Published as an abstract
1) Peiris, T S G (2017). Role of Statisticians in Promoting Good Governance. Proceedings of the 3rd International Statistics Conference, IASSL, (28-29) December, 2017, 81p.
2) Silva H P T N and Peiris, T S G. (2017). Modeling Weekly Rainfall: Problems Encountered. Proceedings of the 3rd International Statistics Conference, IASSL, (28-29) December, 2017, 91p.
3) Amarasinghe A A M D and Peiris T S G (2017). Impact of the Macroeconomic Variables on All Share Price Index: GARCH-X Approach. Proceedings of the 3rd International Statistics Conference, IASSL, (28-29) December, 2017, 113p.
4) Fernando K D U A, Peiris T U I and Peiris, T S G (2017). Determinants of the Banking Sector Development. Proceedings of the 3rd International Statistics Conference, IASSL, (28-29) December, 2017, 115p.
5) Nanayakkara S and Peiris, T. S. G. (2015). Influence of Mathematics in Level 1 on Students Performance in Engineering Programs: A Case Study. International Postgraduate Research Conference, University of Kelaniya, Sri Lanka, 10-11 December.
6) Peiris, T. S. G. (2014). Statisticians’s Role in Climate Change in Sri Lanka. Proceedings of the International Statistics Conference. (28-30) December, Colombo, Sri Lanka, 100p.
7) Mathugama C. S. and Peiris T. S. G. (2014). Lengths of Critical Dry Spells in Sri Lanka. Proceedings of the Predicting International Statistics Conference 2014. (28-30) December, Colombo, Sri Lanka, 101p
8) Razmy A. M. and Peiris T. S. G. (2012). A Standard Method to Compare the Combined Quality Monitoring Schemes Using Average Run Length Properties. International, South Eastern University, 172-173.
9) Mathugama C. S. and Peiris T. S. G. (2012) .Impact of Dry Spells in Diaster Managment: Forecasting Aspects. Proceedings of the 4th InternationalConference on Geo Information Technology for Natural Diasaster Managment, 7-8 November, Colombo, Sri Lanka, 85p
10) Alibuhtto, M. C. and Peiris, T. S. G. (2012). Modelling CCPI Using Time Series ARIMA Model. Proceeding of the 1st Annual Research Conference - Emerging Issues in Management and Finance. Faculty of Management& Commerce, South Eastern University, 63p
11) Peiris, T. S. G. (2011) Measuring Stock Market Volatility in an Emerging Economy. International Conference on Business and Information. Faculty of Commerce and Management Studies, University of Kelaniya.
12) Mathugama, S. C. and Peiris, T. S. G.(2010). Minimizing of vulnerability caused by extended dry spells. Proceeding of the 2nd National Symposium on Disaster Risk Reduction and Climate Change Adaptation, 13-14 October, Sri Lanka Foundation Institute, Sri Lanka, 14p
13) Peiris, T. S. G. (2010). A study of future climate in Sri Lanka. Proceedings of the 2nd National Symposium on Disaster Risk Reduction & Climate Change Adaptation, 13-14 October, SLFI, Colombo, 47p
14) Mathugama, S. C. and Peiris, T. S. G. (2009). Analysis of the occurrence of dry spells in the DL2 region of Sri Lanka, Proceeding of the International Statistics Conference, 8-10 January, Sri Lanka Foudation Institute, Sri Lanka, 10p
15) D. C. Wickramarachchi, S. Samita and Peiris, T. S. G. (2009). An Algorithm to detect over-dispersion in multinomial data. Proceeding of the International Statistics Conference, 8-10 January, Sri Lanka Foundation Institute, Sri Lanka, 21p
16) Peiris, T. S. G. (2006). Impact of climate change on c">
Publications in Refereed Indexed Journals (International)
1) Pasan M. Edirisinghe, Thomas Mathew and T S G Peiris (2019).”Confidence limits for compliance testing using mixed acceptance criteria” Qual Reliab Engng Int. 2020;1–8., . DOI:10.1002/qre.2623
2) Silva, H P T N, Dissanayake, G S and Peiris T S G (2019). The Use ">
10) Nanyakkara K. A. D. S. A. and Peiris, T. S. G. (2016). Imp">
Publications in Refereed non-indexed Journals (National and International
5.4 Presentations in Refereed Proceedings – Published as full paper/extended abstract
5.5 Presentation at Conferences/Communications – Published as an abstract
English
Sinhala
Tamil
