• hdmaths@ou.ac.lk
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Department of
MATHEMATICS

Dr. (Mrs.) H.O.W. Peiris (Head/ Mathematics)

B.Sc (Honors) (University of Sri Jayawardenepura) Ph. D. (University of Colombo).

Senior Lecturer G II

Dept. of Mathematics
  • Room No. 333, 3rd Floor, Science & Technology Building, Central Campus, Nawala, Nugegoda
  • +94112881716 Ext: 3401
  • hoper@ou.ac.lk

I H.O.W. Peiris received B.Sc. (Honors) Degree in Mathematics special with First class from the University of Sri Jayewardenepura, Sri Lanka in 2010. I started my academic career as an instructor at Department of Mathematics, University of Sri Jayewardenepura from 2010 to 2012.  I was joined as a Temporary lecturer at the Department of Mathematics, Faculty of Natural Sciences in 2012 and appointed as the Lecturer (probationary) in the same department in 2014.  In the meantime, I was joined as a postgraduate student in the Department of Mathematics, Faculty of Science in University of Colombo. My Ph.D. research was based on mathematical modeling and received grant from University of Colombo to carry out work with my overseas supervisor in National Institute of Technology Rourkela, India. I was able to finish the PhD research in 2019. I have published several articles in peer reviewed journals, conference abstracts/full papers and book/book chapters.

Currently, I am engaged in collaborative research work in Research & Development Centre for Mathematical Modeling at University of Colombo.

Fuzzy Uncertainty Based Modeling

Fuzzy Linguistic Modeling, Fuzzy Set Theory

Senior Lecturer Grade II,                    Department of Mathematics, Faculty of
Natural Science, The Open University of Sri Lanka. June 2019 – present                              

Lecturer (Probationary)                       Department of Mathematics, Faculty of                                                                                                                                   Natural Science, The Open University of Sri Lanka. March 2014 – May                                                                         2019
Visiting Lecturer                                   (B.Sc. in Financial Engineering, External Degree      
                                                                   Programme), Department of Mathematics, Faculty of Science,
                                                                  University of Colombo. January 2020 – present    

Assistant Lecturer                                Department of Mathematics, Faculty of Natural Science, The Open                                                                                  University of Sri Lanka. September 2012 – February 2014

Instructor in Mathematics                  Department of Mathematics, Faculty of Science,      
                                                                  University of Sri Jayewardenepura, Sri Lanka. August 2010 –August 2012 

Coordinator B.Sc. (Hons.) in Mathematics Degree Programme

Course Coordination
PEU3300 – Mathematical Logic and Mathematical Proofs (Level III course)
ADU3302 – Differential Equations (Level III course)
ADU5320 – Introduction to MATLAB software (Level V course)

  • Fuzzy Symmetric and Asymmetric Linguistic Scale Approaches in Mathematical Modeling
  • Peiris, H.O.W., Chakraverty, S., Perera, S.S.N. and Ranwala, S.M.W. (2021). Modeling Invasive Alien Plant Species: Fuzzy-Based Uncertainty, Taylor & Francis Group, CRC Press, Boca Raton, FL.
  • Peiris, H.O.W., Chakraverty, S., Perera, S.S.N. and Ranwala, S.M.W. (2018). Modelling Dispersal Risk of  
      Invasive Alien Plant Species. In S. Chakraverty and S.S.N. Perera (Eds.), Recent Advances in Applications  
      of Computational and Fuzzy Mathematics. 109-145. Singapore, Springer.
  • Peiris, H.O.W., Chakraverty, S., Perera, S.S.N. and Ranwala, S.M.W. (2017). Novel Fuzzy Linguistic   
    based Mathematical model to assess risk of Invasive alien plant species, Applied Soft Computing  
    (ELSEVIER). 59, 326-339.
  • Peiris H.O.W., Perera S.S.N., Chakraverty S. and Ranwala S.M.W. (2018) Development of a  
    mathematical model to evaluate the rate of aggregate risk of invasive alien species: Fuzzy risk  
    assessment approach, international journal of Biomathematics (World Scientific). 11 (4), 1-17.
  • Meththananda, R.G.U.I., Ganegoda, N.C., Perera, S.S.N., Erandi,, K.K.W.H., Jayathunga, Y., Peiris, H.O.W. (2021) On timeline of enhancing testing-capacity of COVID-19: A case study via an optimal replacement model, Journal of Process Control (ELSEVIER). 105, 204-213.
  • Peiris, H.O.W., Chakraverty, S., Perera, S.S.N. and Ranwala, S.M.W. (2016). Development of a Risk    Assessment Mathematical Model to Evaluate Invasion Risk of Invasive Alien Species using Interval  
    Multivariate Linear Regression, British Journal of Applied Science & Technology. 16(1), 1-11.
  • Peiris, H.O.W., Chakraverty, S., Perera, S.S.N. and Ranwala, S.M.W. (2017). Novel Fuzzy Based Model   
    on Analysis of Invasiveness due to Dispersal related Traits of Plants, Annals of Fuzzy Mathematics and Informatics. 13(3), 6-14.
  • Peiris H.O.W., Chakraverty S., Perera S.S.N. and Ranwala S.M.W. (2018) Novel interval multiple linear
    regression model to assess the risk of invasive alien plant species, Journal of Science, Eastern  
    University, Sri Lanka. 9 (1), 12-30.
  • Peiris, H.O.W., Perera, S.S.N. and Ranwala, S.M.W. (2014). Development of a fuzzy based model to  
    evaluate the risk of invasive plant species due to dispersal traits, Annual Academic Sessions of the  
    Open University of Sri Lanka, 27-28 November, 332- 336.
  • Peiris, H. O. W., Perera, S. S. N., Chakraverty, S. and Ranwala, S. M. W. (2016). 2-Tuple Fuzzy Linguistic Model to Evaluate the Risk of Invasive Plant Species, Symposium on Statistical & Computational Models with Applications University of Kelaniya, Sri Lanka, 45-49.
  • Peiris, H. O. W., Perera, S. S. N., Chakraverty, S., Ranwala and S. M. W. (2017). Evaluate the Rate of   
    Aggregate Risk of Invasive Alien Species: Fuzzy Risk Assessment Approach, 6th Annual International  
    conference on Computational Mathematics, Computational Geometry and Statistics, Singapore, 18- 
    23.
  • Ganegoda N.C., Perera S.S.N., G¨otz T., Wijaya K.P., Jayathunga Y., Peiris H.O.W., Meththananda    R.G.U.I., Erandi K.K.W.H., Gamachchige R.N., Thrimavithana R.T.(2021) Mitigating covid-19  
    transmission in Sri Lanka: A mathematical outlook for decision support, COVID 19: Impact, Mitigation,   Opportunities and Building Resilience, 1:151-161.
  • Peiris HOW, Perera SSN, Ranwala SWM (2014). Fuzzy Based Model on Analysis of Invasiveness due to  Dispersal Related Traits of Plants”, Proceedings, Annual Research Symposium University of Colombo,  pp 237.
  • Peiris, H.O.W., Perera, S.S.N., Chakraverty, S and Ranwala, S.M.W. (2019). Fuzzy linear regression
    model to assess the dispersal risk of Invasive alien plant species, Proceedings, Annual Research  
    Symposium of University of Colombo, University of Colombo, pp 229.

Project title: A Mathematical Approach to develop an Optimal Subsidy  Model for Sri Lanka.

  Visiting Lecturer      (B.Sc. in Financial Engineering, External Degree                                                                                                                       Programme), Department of Mathematics, Faculty of Science,
                                       University of Colombo. January 2020 – present    

  • NRC Merit Award for Scientific/Research Publications – 2019
  • Post graduate research grant (University of Colombo) – 2012.

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