Browsing by Author "Gunawardana, M"

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Factors Affecting Academic Performance of People with Visual Disabilities in the Tertiary Sector
(Faculty of Humanities and Sciences,SLIIT, 2021-09-25) Suraweera, T; Wickramarachchi, C; Dewage, N; Gunawardana, M; Nanayakkara, T; Yapa, N; Handapangoda, R; Wickramarachchi, C
The role of education in enriching people’s lives is an undisputed fact. Most past studies have been conducted on the factors affecting academic performance focused on the sighted learners engaged in education in the academic systems. Given that the persons with disabilities are guarded/protected comparatively better in the Western word than in the developing nations, achieving academic goals for visually handicapped persons could be further challenging. This research is aimed at exploring the critical factors influencing academic performance of visually handicapped persons in Universities of Sri Lanka, a developing nation. Adopting a qualitative approach, eleven persons were purposely selected to represent varying levels of academic achievements in universities as case study subjects. The data collected through in-depth semi-structured interviews were analysed mainly through thematic analysis. Having a clear understanding of the key elements influencing academic performance of persons who are visually handicapped could make a significant difference to this community and is an eye opener for the policy makers in the tertiary education sector.
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Management of municipal solid waste open dumps immediately after the collapse: An integrated approach from Meethotamulla open dump, Sri Lanka
(Elsevier, 2019-07-15) Jayaweera, M; Gunawardana, B; Gunawardana, M; Karunawardena, A; Dias, V; Thilakasiri, S; Karunarathne, D; Wijeratne, N; Manatunge, J; Dissanayake, J. M
Meethotamulla open dump (MOD) of Sri Lanka that has received about 290,000 metric tons of mixed MSW annually collapsed on 14th April 2017 with massive devastation. An integrated approach was attempted to control further collapse with the deployment of drone-assisted and stand-alone instrumentation. The collapsed dump was analyzed for attributes, including contours, heights, wetness, temperature levels, tension cracks, landfill gases, fire, explosion, and asphyxiation hazards with 24-h surveillance after one day of the collapse. The mode of MOD failure was implicated to be deep-seated (rotational) slope failure. A short-term plan, consisting of 12 activities was prepared and successfully implemented. The activities of the short-term plan were carried out at the dumpsite until the water level fluctuations <5 cm, inundation of the toe area receded completely, the horizontal displacement of surface markers <20 mm, lower explosive levels of CH4 and CO less than 5 and 12%, respectively, O2 level improved up to 21%, and temperature variation of the collapsed face <2 °C. The short-term plan was halted when the factor of safety for slope failure of the critical face improved from 0.807 to 1.286 ensuring no signs of a subsequent collapse of the MOD. An early warning system was established in the case of an imminent collapse. This integrated approach, to our knowledge, is the first study instituted, and this holistic management effort could be easily replicated to avoid disasters from slope failures of landfills or open dumps that may occur elsewhere.
Embargo
Management of municipal solid waste open dumps immediately after the collapse: An integrated approach from Meethotamulla open dump, Sri Lanka
(Elsevier, 2019-07) Jayaweera, M; Gunawardana, B; Gunawardana, M; Karunawardena, A; Premasiri, S; Manatunge, J; Wijeratne, N; Thilakasiri, S; Karunarathne, D; Dias, V
Meethotamulla open dump (MOD) of Sri Lanka that has received about 290,000 metric tons of mixed MSW annually collapsed on 14th April 2017 with massive devastation. An integrated approach was attempted to control further collapse with the deployment of drone-assisted and stand-alone instrumentation. The collapsed dump was analyzed for attributes, including contours, heights, wetness, temperature levels, tension cracks, landfill gases, fire, explosion, and asphyxiation hazards with 24-h surveillance after one day of the collapse. The mode of MOD failure was implicated to be deep-seated (rotational) slope failure. A short-term plan, consisting of 12 activities was prepared and successfully implemented. The activities of the short-term plan were carried out at the dumpsite until the water level fluctuations <5 cm, inundation of the toe area receded completely, the horizontal displacement of surface markers <20 mm, lower explosive levels of CH4 and CO less than 5 and 12%, respectively, O2 level improved up to 21%, and temperature variation of the collapsed face <2 C. The short-term plan was halted when the factor of safety for slope failure of the critical face improved from 0.807 to 1.286 ensuring no signs of a subsequent collapse of the MOD. An early warning system was established in the case of an imminent collapse. This integrated approach, to our knowledge, is the first study instituted, and this holistic management effort could be easily replicated to avoid disasters from slope failures of landfills or open dumps that may occur elsewhere.