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Browsing UoM Conferences by Conference "19th ERU Symposium - 2013"

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    Design and Implementation of a Laboratory-scale Microgrid
    (2013) Muthugala, VV; Pathirana, NPDS; Nanayakkara, WHKP; Nanayakkara, NPDCD; Hemapala, KTMU
    This paper deals with the implementation of a single phase laboratory scale micro grid (MG) including a control system based on emulated energy resources and loads which permits the experimentation of various scenarios. The proposed MG is comprised of a wind turbine simulator, a solar photovoltaic (PV) and a battery bank which are connected to the MG via flexible Voltage Source Inverters respectively. Although a MG can operate either in grid connected mode or islanded mode, in our research we have mainly focused on islanded operation only. In that mode, bidirectional inverter performs a major role in maintaining the voltage and frequency at an acceptable level for safe collaborative operation. The results of these studies show the capability of developing a reliable control mechanism for islanding operation of micro grids based on the proposed concept.
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    A Framework to analyze the effectiveness of collaborative e-Learning (CeL) in Sri Lankan University Education
    (2013) Kanaganayagam, I; Fernando, MSD
    E-learning introduced new ways of learning using computers and the Internet, and is rapidly evolving with the development of technology. Learners can actively participate and collaborate in a learning process using either synchronous or asynchronous e-learning. Collaborative e-Learning (CeL) is an effective pedagogy approach, which also improves the processing skills, communication skills, and cognitive skills of the students. In this research study, a framework was developed to analyze the effectiveness of CeL in Sri Lankan university education. The study was conducted among lecturers, assistant lecturers, undergraduate students and post-graduate students of 15 Sri Lankan National universities. Interviews were used as the research instrument through different media such as direct interview, telephone interview and Skype interview. Our research findings helped to identify the most effective tools to use in CeL, which improve lecturer-student and student-student interaction. Further, awareness about CeL, perception of the requirement of CeL, and the assessment criteria of the effectiveness of CeL were identified in the context of Sri Lankan university education. In addition, a framework was developed to analyze the effectiveness of CeL in a quantitative manner. Finally, this paper presents recommendations to improve the effectiveness of CeL in Sri Lankan universities and discusses possible areas for future research in this arena.