Research Repository: Recent submissions

  • Speeded-up and Compact Visual Codebook for Object Recognition 
    Barathy, M.; Ramanan, A.; Mahesan, S.; Pinidiyaarachchi, U.A.J. (International Journal of Image Processing (IJIP), 2013)
    The well known framework in the object recognition literature uses local information extracted at several patches in images which are then clustered by a suitable clustering technique. A visual codebook maps the ...
  • Control chart pattern clustering using a new self-organizing spiking neural network 
    Pham, D. T.; Packianather, M.S.; Charles, Eugene Yougarajah Andrew (Proceedings of the Institution of Mechanical Engineers, 2008-10-01)
    This paper focuses on the architecture and learning algorithm associated with using a new self-organizing delay adaptation spiking neural network model for clustering control chart patterns. This temporal coding spiking ...
  • Reproducing opportunistic connectivity traces using connectivity models 
    Thabotharan, Kathiravelu; Pears, A. (ACM New York, NY, USA ©2007, 2007-12-10)
    Opportunistic networking is a new communication paradigm which explores the potential of inter-device contacts due to human mobility [3, 5]. Intermittent connectivity, non existence of an end-to-end path between nodes and ...
  • Towards designing a routing protocol for opportunistic networks 
    Thabotharan, Kathiravelu; Ranasinghe, N.; Perera, A. (IEEE, 2010)
    Intermittently connected opportunistic networks experience frequent disconnections and shorter contact durations. Therefore routing of messages towards their destinations needs to be handled from various points of view. ...
  • An enhanced congestion aware adaptive routing protocol for opportunistic networks 
    Thabotharan, Kathiravelu; Ranasinghe, N.; Perera, A. (IEEE, 2011-08)
    The adaptive routing protocol recently proposed by researchers for opportunistic networks often makes an assumption that when each node makes an intelligent decision of choosing a best forwarder node to route its messages, ...
  • Approaches to P2P Internet Application Development 
    Thabotharan, Kathiravelu; Pears, A. (Computer Science and Information Systems, 2011-09-21)
    Research in overlay and P2P networking has been tightly focused on fundamentals in the last few years, leading to developments on a range of important issues. The time has come to integrate these insights into existing and ...
  • What & when?: Distributing Content in Opportunistic Networks 
    Kathiravelu, T.; Pears, A. (Wireless and Mobile Communications,, 2006)
    Tomorrow's mobile data exchanges will often occur using intermittent connectivity and the design and development of mobility models, applications, protocols and infrastructures are an essential part of future research in ...
  • Modeling of Electric Vehicle Fast Charging Station and Impact on Network Voltage 
    Yong, J.Y.; Ramachandaramurthy, V.K.; Arulampalam, A.; Selvaraj, J.; Tan, K.M. (IEEE International Conference on Clean Energy & Technologies, 2013-11)
    Excessive greenhouse gas emissions from conventional internal combustion engine vehicles have encouraged governments worldwide to seek for alternative solutions and electric vehicles seems to be a promising replacement. ...
  • Electrical Stability of Large Scale Integration of Micro Generation into Low Voltage Grids 
    Xueguang, W.; Yibin, Z.; Arulampalam, A.; Jenkins, N. (International Journal of Distributed Energy Resources, 2005-12)
    With large-scale integration of micro generation into low voltage grids, stability becomes an important issue for a MicroGrid. The unique nature of the MicroGrid requires that the MicroGrid is stable in both grid-connected ...
  • Application of a Static Reactive Power Compensator (STATCOM) and a Dynamic Braking Resistor (DBR) for the Stability Enhancement of a Large Wind Farm 
    Xueguang, W.; Arulampalam, A.; Changjiang, Z.; Jenkins, N. (Journal of Wind Engineering, 2003-06)
    A control strategy to improve the stability of a large wind farm using a Static Reactive Power Compensator (STATCOM) and Dynamic Braking Resistor (DBR) is proposed and investigated. The STATCOM supplies the reactive power ...
  • Novel C2R-R Configuration for Micro-hydro Plants used in Islanded Systems 
    Weerakoon, T.S.; Chandrasena, R.P.S.; Arulampalam, A. (Journal of Energy and Environment, 2009-04)
    This paper presents a novel strategy used to obtain single phase power from three phase power generated through a three phase induction generator. In pico and micro hydro power generations in rural areas, the traditional ...
  • Development of Digital Control System for Current and Temperature Control of an Electrodialyser 
    Walgama, K.S.; Ekanayake, J.B.; Atputharajah, A. (Journal of the Institution of Engineers, 2000-05)
    The electrodialyser lab process used for the treatment of black liquor, the liquid effluent from pulp industry, needs to be controlled for the efficient performance, and for the parametric study and mathematical modeling ...
  • Incorporating Pumped Storage Power Plant in the Sri Lankan Electricity Sector 
    Vivekananthan, C.; Anparasan, M.; Arunprasanth, S.; Fernando, M.A.R.M.; Atputharajah, A.; Ratnayake, U.R. (105th Annual conference session of the Institution of Engineers Sri Lanka, 2011-10)
    Sri Lanka is anticipated to experience a coal dominant electricity sector within this decade with the introduction of planned large scale coal power plants. Developing Pumped Storage Power Plant (PSPP) would be one of the ...
  • Wind Turbine Emulator 
    Vaheeshan, J.; Vihirthanath, V.; Abeyaratne, S.G.; Atputharajah, A.; Ramatharan, G. (IEEE 6th International Conference on Industrial and Information Systems, 2011-08)
    The paper presents the development of a DC motor based Wind Turbine Emulator (WTE) and its performance verification through simulation. The torque signal that represents the actual wind turbine with environmental effect ...
  • A Novel Concept for Static VAR Compensators 
    Tharaka, R.M.R.; Bandara, R.W.K.M.R.K.D.; Abeyratna, S.G.; Atputharajah, A.; Fernando, M.A.R.M.; Navarathne, D.N. (IEEE 8th International Conference on Industrial and Information Systems, 2013-12)
    A new configuration to replace the Thyristor Controlled Reactor (TCR) of a Static VAR Compensator (SVC) by a DC link voltage controlled inductor is proposed in this paper. In this proposed technique, the reactor current ...
  • Stability Margin of DFIG wind turbines: effects and solutions 
    Tennakoon, A.P.; Ekanayake, J.B.; Arulampalam, A.; Abeyaratne, S.G. (Journal of Wind Engineering, 2011)
    Doubly Fed Induction Generator (DFIG) based wind farms are one of the major contributors to wind power generation. Even though they possess advantages such as the capability of generating active power over an extended range ...
  • Improvement of Voltage Profile and Stability of Wind-farm Connected Medium-voltage Distribution Networks: A case study 
    Tennakoon, A.P.; Arulampalam, A.; Ekanayake, J.B. (Annual Transaction of the Institution of Engineers, 2004)
    Many countries have now recognized wind as a sustainable source of energy and the installed capacity of wind generation worldwide now exceeds 25GW. In Sri Lanka very little emphasis is given for wind generation. No major ...
  • Fault Ride through of Fully Rated Converter Wind Turbines with AC and DC transmission systems 
    Ramtharan, G.; Arulampalam, A.; Ekanayake, J.B. (IET proceedings on Renewable Power Generation, 2009-12)
    Fault ride through of fully rated converter wind turbines in an offshore wind farm connected to onshore network via either high voltage AC (HVAC) or high voltage DC (HVDC) transmission is described. Control of the generators ...
  • Constant Frequency Control of an Active Power Filter 
    Ramtharan, G.; Abeyaratne, S.G.; Atputharajah, A. (Journal of the National Science Foundation, 2006-03-01)
    Active Power Filters (APFs) improve the utility by correcting harmonic distortions created by non-linear loads. It also correct for the poor power-factor resulted due to inductive loads. Topologies and control techniques ...
  • Supervisory Control of Dynamic Voltage Restores 
    Ramachandaramurthy, V.K.; Arulampalam, A.; Fitzer, C.; Zhan, C.; Barnes, M.; Jenkins, N. (IEE Proceedings on Generation Transmission and Distribution, 2004-07)
    The impact of system issues on the performance and power rating of dynamics voltage restorers is examined. Algorithms to restore a network voltage sag or swell to given set points have been the subject of significant research ...