• Text Mining
• Clustering 
• Natural Language Processing 
• Software Engineering 
• Electronic Plagiarism Detection 
• Management Information Systems 
• Transaction Cost Economics 
• Business Performace

National/International peer-reviewed journals

• Ranatunga, R.V.S.P.K., & Priyanath, H.M.S. (2023). Do Transaction Costs Avert Livelihoods? An Empirical Study of Samurdhi Beneficiaries in Sri Lanka. Colombo Economic Journal (CEJ), 1(1), 1-26.
• Ranatunga, R.V.S.P.K., Jayasekara, & M.D.R. Priyanath, H.M.S. (2022). Impact of ICT Usage and Dynamic Capabilities on the Business Resilience of SMEs During the COVID-19 Pandemic: A Case of Galle District. Journal of Management Matter 9(2), 63-95.
• Purnima, U.G.K., Ranatunga, R.V.S.P.K. & Priyanath, H.M.S. (2021). The impact of Samurdhi development program on self-employment motivation of women (A study on self-employed Samurdhi recipient women in Matara district, Sri Lanka).  Journal of Management Matter 8(2), 75-79.
• Ranatunga, R.V.S.P.K., Priyanath, H.M.S., & Meegama, R.G.N. (2021). ICT Usage, Bounded Rationality and Business Performance of SMEs in Sri Lanka.  Colombo Business Journal, International Journal of Theory and Practice 12(1), 54-86.
• Madubashini, H. I., Ranatunga, R. V. S. P. K., & Priyanath, H. M. S. (2021). Customers' Satisfaction towards Bank Services: An Empirical Analysis in the Perspective of Transaction Cost. Sri Lankan Journal of Banking and Finance, 4(1), 145-175.
• Ranatunga, R.V.S.P.K., Priyanath, H.M.S., & Meegama, R.G.N. (2021). Role of Mobile Technology on Business Opportunism and Performance of SMEs in Sri Lanka, Sri Lanka Journal of Social Sciences and Languages, 1(1), 53-61.
• Ranatunga, R.V.S.P.K., Priyanath, H.M.S., & Meegama, R.G.N. (2021). ICT Usage and Business Performance of SMEs in Sri Lanka: The Mediation Effect of Bounded Rationality. Wayamba Journal of Management, 11(2), 01–24.
• Ranatunga, R.V.S.P.K., Priyanath, H.M.S., & Meegama, R,G.N. (2020). Digital Literacy, Business Uncertainty & Economic Performance: An Empirical Study of Small Businesses in Sri Lanka. International Journal of Academic Research in Business and Social Sciences, 10(5), 50–76.
• Ranatunga, R.V.S.P.K., Priyanath, H.M.S., & Meegama, R,G.N. (2020). Methods and rules-of-thumb in the determination of minimum sample size when applying structural equation modelling: A review. Journal of Social Science Research 15(2020), 102–109.
• Ranatunga, R.V.S.P.K. (2013). Finding Efficient Linguistic Feature Set for Authorship Verification, Journal of Computer Science, 1(1) 35 – 43.
• Meegama, R.G.N., Ranatunga, S.P.K. (2009). UML-based Framework for Human Resource Management. International Journal of Software Engineering and Computing, 1(1), 31-35.

National and International Conferences

• Imbulegama, I.G.D., & Ranatunga, R.V.S.P.K. (2018). Impact of Information and Communication Technology in Secondary Education: An Empirical Study in Rathnapura District, 7^th International Conference of the Sri Lanka Forum of University Economists (SLFUE).
• Ranatunga, R.V.S.P.K. (2012). Finding Efficient Linguistic Feature Set for Authorship Verification, 4th International Symposium, SUSL.
• Ranatunga, R.V.S.P.K., Atukorale A. S., & Hewagamage K. P. (2011). Intrinsic Plagiarism Detection with Kohonen Self Organizing Maps. Advances in ICT for Emerging Regions (ICTer), UCSC, Colombo.
• Ranatunga, R.V.S.P.K., Atukorale, A.S., & Hewagamage, K.P.  (2010). Enhancing the Detection of Plagiarism with Document Formatting Property Analyzer. 3^rd International Symposium,SUSL.
• Ranatunga, R., Atukorale A.S., and Hewagamage, K.P. (2007). An Integrated Framework for Detecting Plagiarism in eLearning Systems. Designs for Learning conference, Colombo.
• Ranatunga, S.P.K., Meegama R.G.N. (2006) A .NET Framework for University Administration. International Symposium, Sabaragamuwa University of Sri Lanka.

Published Abstracts

• Ranatunga, R.V.S.P.K., Priyanath, H.M.S., & Meegama, R,G.N. (2021). Effect of ICT Strength on Transaction Cost and Business Performance: An Empirical Investigation of SMEs in Sri Lanka. 12th Annual Research Session, Sabaragamuwa University of Sri Lanka.
• Ranatunga, R.V.S.P.K., Priyanath, H.M.S., & Meegama, R,G.N. (2021). Effect of ICT Usage on Business Performance of SMEs in Sri Lanka. 11th Annual Research Session, Sabaragamuwa University of Sri Lanka.
• Ranatunga, R.V.S.P.K., Priyanath, H.M.S., & Meegama, R,G.N. (2020). ICT Usage, Bounded Rationality and Business Performance: An Empirical Investigation of SMEs in Sri Lanka. 10th Annual Research Session, Sabaragamuwa University of Sri Lanka, 32.
• Ranatunga, R.V.S.P.K., Priyanath, H.M.S., & Meegama, R,G.N. (2019). ICT Strength, Transaction Cost and Business performance: An Empirical Investigation of SMEs in Sri Lanka. 7th International Conference of Sabaragamuwa University of Sri Lanka ICSUSL 2019,167.
• Ranatunga, R.V.S.P.K., Priyanath, H.M.S., & Meegama, R,G.N. (2019). ICT Strength, Transaction Cost and Business performance: An Empirical Investigation of SMEs in Sri Lanka: A Literature Review. 8th Annual Research Session, Sabaragamuwa University of Sri Lanka.

Published Books & Book Chapters

• Ranatunga, R.V.S.P.K., Priyanath, H.M.S., & Meegama, R.G.N. (2021). Effect of ICT strength on transaction cost and business performance: An empirical investigation of SMEs in Sri Lanka. PhD Thesis, Faculty of Graduate Studies, Sabaragamuwa University of Sri Lanka.
• Ranatunga, R.V.S.P.K. (2012). Plagiarism Detection in e-Learning Systems. M.Phil. Dissertation, University of Colombo School of computing.
• Ranatunga, S.P.K. (2000). Pariganaka Drudanga Pilibanda Hadinweemak. Giraga Academic Magazine, Sabaragamuwa University of Sri Lanka, 2(1), 69-86.
• Ranatunga, S.P.K., (1999). Pariganakayen Bindak. Giraga Academic Magazine, Sabaragamuwa University of Sri Lanka, 1(1), 11-123.

News Paper Articles

• Ranatunga, R.V.S.P.K., Priyanath, H.M.S. (2023 April 30). The Urgency of Designing a Unique Economic Development Model for Sri Lanka. Sunday Observer. https://epaper.dailynews.lk/Home/ArticleView?eid=14&edate=30/04/2023&pgid=68074
• Ranatunga, R.V.S.P.K., Priyanath, H.M.S. (2023 March 26). The Dilemma of Livelihood Development of Samurdhi Beneficiaries. Sunday Observer. https://epaper.dailynews.lk/Home/ArticleView?eid=14&edate=26/03/2023&pgid=66876
• Ranatunga, R.V.S.P.K., Priyanath, H.M.S. (2021 September 26). How should Small and Medium Enterprises Cope with the Covid-19 Uncertainty? A solution from Digitization. Sunday Observer. https://epaper.dailynews.lk/Home/ArticleView?eid=14&edate=26/09/2021&pgid=42189
• Ranatunga, R.V.S.P.K., Priyanath, H.M.S. (2021 July 04). Paradigm Shift with New Business Model using Digital Technologies to Reshape the Growth of SMEs in COVID-19 Pandemic. Sunday Observer.

Google Scholar

• Project Consultant – Development of “BerliBridge” Dynamic Web Application under HETC Project, Faculty of Management Studies, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka. 2014

• Project Consultant – Development of Dynamic Web Application for Student Registration and Management System under IRQUE Project, Center for Open & Distance Learning, Belihuloya, Sri Lanka. 2014
• IT Consultant – DTec Systems (Pvt) Ltd. No 511, Uswattha, Katuwawala, Boralesgamuwa, Sri Lanka.
• IT Consultant - ISoft Lanka (Pvt) Ltd., 1035/6, Pannipityaya Rd, Battharamulla, Sri Lanka
• IT Consultant (Procurement) – (2015 - 2016) Ministry of Education, Information Technology and Cultural Affairs,  Sabaragamuwa Provincial Council, New Town, Rathnapura, Sri Lanka.

• Resource Person - Workshops for designing and implementing database software for External Degree Programmes & Extension Services Unit on 10th July 2015
• Resource Person - Preparing the Policy on Information & Communication Technology of the Sabaragamuwa University of Sri Lanka. 
• Resource Person - Workshop on Information Technology in the Faculty of Medicine Orientation Program on 31st January, 12th February, and 22nd February 2018. 
• Panel Member -  in ICT (Session – 01) of the 4th Annual Student Research Session – 2018 on 26th July 2018. 
• Resource Person - lectures on “Hostal Life” for the orientation program 2016/2017, on 16th November 2017.
• Member of the Orientation and Leadership Programme for Fresher’s academic year 2014/2015.
• Resource Person - lecture on “Violence Free University Life” for the orientation program on 24th April 2015.
• Resource Person - Lecture on “Computer Education in University” for the orientation program on 24th April 2015.
• Member of the Orientation Programme event coordinating committee, which was held from 19th April to 15th May 2015.
• Resource Person - Panel Discussion on the “Be Ready – 21 Days” program, HETC/QIG project on 1st January 2014 and 22nd January 2014.
• Resource person and post of visiting Lecturer - Bachelor of Business Administration (External) Degree, Center for Open and Distance Learning from 12th June 2022 for five seminars.
• Visiting Lecturer in the Department of Commerce & Financial Management of the University of Kelaniya from 19th December 2011 to 01st April 2012 for 60 hours lecture series on IT Project Management.

Peer Reviewer

• Sri Lanka Journal of Social Sciences and Humanities, Faculty of Social Sciences and Languages, Sabaragamuwa University of Sri Lanka, Belihuloya, 70140, Sri Lanka.

• Sri Lanka Journal of Economics, Statistics, & Information Management, Faculty of Social Sciences and Languages, Sabaragamuwa University of Sri Lanka, Belihuloya, 70140, Sri Lanka.

• 1^st International Conference of Social Sciences and Languages (ICSSL 2023), Faculty of Social Sciences and Languages, Sabaragamuwa University of Sri Lanka. Belihuloya, 70140, Sri Lanka.

• Sri Lanka Journal of Economics, Statistics, & Information Management, Faculty of Social Sciences and Languages, Sabaragamuwa University of Sri Lanka. Belihuloya, 70140, Sri Lanka.

• 2018 April to present – Senior Lecturer Grade I, Center for Computer Studies, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka
• 2013 April to 2018 April – Senior Lecturer Grade II, Center for Computer Studies, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka
• February 2018 to December 2018 – Director, Center for Computer Studies, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka.
• October 2017 to 2018 October -- Academic Warden, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka.
• January 2014 to December 2014 -- Coordinator/Training – External Degree Programmes and Extension Services Unit, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka.
• January 2014 to December 2015 – Director, Center for Computer Studies, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka.
• January 2014 to December 2015 – Proctor, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka.
• 2000 to 2018 – Coordinator, Certificate Course in Computer Applications, Center for Open and Distance Learning, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka.
• Visiting Lecturer – Certificate in Computer and Information Technology, Center for Open and Distance Learning, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka.
• Visiting Lecturer – Diploma in Software Engineering, Center for Open and Distance Learning, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka.
• Visiting Lecturer – IT Professional Courses, Center for Open and Distance Learning, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka.
• Visiting Lecturer – Higher Diploma in English, Center for Open and Distance Learning, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka.