Browsing by Author "Karunasena, K"

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Intelligent Water Quality Monitoring and Prediction System
(Institute of Electrical and Electronics Engineers Inc., 2025) Shiraz, S; Karunasena, K; Mudelige, H; Kumarasinghe, O; Nawinna, D; Perera, J
The paper aims to develop an integrated approach to improve water treatment processes using predictive modeling and SCADA integration in order to meet the specific needs of water purification systems in Sri Lanka. The current systems utilized for this need are outdated since these systems are based on traditional technologies and do not have the means for predictions or real-time data accessibility outside the system. The proposed solution will focus on raw water quality prediction, optimization of chemical usage to bring in efficiency, sustainability, and resource management, ensuring seamless access to all the relevant data required to manage and monitor. In order to achieve this, past data provided by the Meewatura water plant in Sri Lanka, sourced from the Mahawali river, is utilized for the relevant predictions alongside of the data gathered through the SCADA system. The data is not directly accessible since the SCADA system is mainly built for monitoring, and in order to get the data, a MODBUS connection through the PLC is utilized alongside of an IOT device. In addition to the extracted data, past data that was provided by the water plant is also incorporated. The combined data set is utilized for the predictions while continuously improving itself with new data. The present study contributes to the establishment of sustainable and adaptable water treatment frameworks for a wide range of operational needs within the water plants by addressing the gaps in the existing water quality management systems and improving upon them.
Open Access
Prevalence, nature and impacts of non-sexual online harassment in Sri Lanka: A quantitative analysis
(Elsevier Ltd, 2025-10-20) Harasgama, K. S.; Karunasena, K; Senarath, S; Jayamaha, S; Mahingoda, C.B; Deshapriya, W
The objective of this study is to examine the prevalence, nature and impacts of nonsexual online harassment among the youth population in Sri Lanka. Data was collected through a countrywide survey from a cross-sectional sample of 4805 young people. Data was analysed using SPSS software package. Results of this study indicate that 11.7 % of the youth population surveyed had experienced non-sexual forms of harassment in the cyberspace. The analysis also revealed the most common types of harassment experienced, the platform where harassment was committed the most, the most common types of victims and perpetrators, and the impacts of non-sexual online harassment on victims. The findings of this study suggest that Sri Lanka needs to devise targeted policies for combatting non-sexual online harassment, and that it may need to tailor its responses to the needs of each sector.