Browsing ERU - 2008 by Year "2008"

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  • A compact and high performance SC DC/DC buck converter 
    Baek, CJ; Kumarawadu, S [Conference-Abstract]
    A novel paralleling interleaved discharging (PID) approach is presented to reduce the output ripple and continuous input current waveform in step-down switched capacitor (SC). Theoretical analysis and the computer simulation ...
  • A comparative study on work related attitudes of operator level employees and supervisors across firms of different ownership in Sri Lanka 
    Wanniarachchi, T; Wickramasinghe, V; Wanigatunge, N [Conference-Abstract]
    This study investigates the influences of work related attitudes different ownerships (local, foreign and joint venture) type of firms as well as different employee category (worker level employee and supervisory level ...
  • A novel active inrush suppression method for SC converter 
    Baek, CJ; Kumarawadu, S [Conference-Abstract]
    A new type of Inrush suppression circuit in SC buck converter is proposed. The method is realized by the hybrid of passive and active circuits. It adapts PIC micro controller to generate multi pulse to drive multi switches. ...
  • A novel morphin-based obstacle avoidance control algorithm for USVs 
    Jayendra, G; Kumarawadu, S; Piyasinghe, L [Conference-Abstract]
    This is an effort of employing good obstacle avoidance algorithms for unmanned surface vehicles (USV) which are already developed for unmanned ground vehicles (UGV). Previously developed Morphin algorithm is utilized for ...
  • Accurate attitude estimation of low-accelerating vehicles by the use of multiple low cost MEMS-Based IMUs 
    Dharmapriya, TDK; Kumarawadu, S; Piyasinghe, LP [Conference-Abstract]
    Inertial sensors and inertial measurement units (IMUs) are widely used in navigation support systems, autonomous vehicle navigation, and vehicle motion control process. Inertial measurement based attitude determination and ...
  • Alternative techniques for economical and quality injection mould making for low volume production in Sri Lanka 
    Mangala, KHJ; Walpolage, S; Warnakulasuriya, N; Wickramasekara, H; Wijayawardana, L [Conference-Abstract]
    At present, low volume production of injection moulded parts are being neglected due to high costs. This research was carried out to identify feasible alternative techniques of injection mould making for low volumes. A ...
  • Alum and Lime dosing controllers for water treatment plant 
    Hettiarachchi, LP; Dassanayake, VPC [Conference-Abstract]
    Many techniques are applied to control coagulant dosing in a drinking water treatment plant. Coagulant dosing rate is non linear correlated to raw water parameters such as turbidity, conductivity, pH, temperature, etc. ...
  • An Active monocular platform for intelligent vehicles: Design and simulations 
    Piyasinghe, LP; Kumarawadu, S; Jayendra, G; Dharmapriya, K [Conference-Abstract]
    Intelligent vehicles have to perceive their environment in order to navigate and avoid collision. This capability is also important in other applications such as mobile robot navigation, Automated Guided Vehicles (AGVs) ...
  • An analysis of environmental performance of natural dyes 
    Wijayapala, UGS [Conference-Abstract]
    The objective of this study is to demonstrate the limited heavy metal content in natural dyes (ie to demonstrate near zero burden on the environment) and the final effluent COD (to test the hypothesis that the effluent is ...
  • Analysis of risks and bottlenecks of a poly bag manufacturing factory - a case study 
    Gopura, RARC; Jayawardene, TSS [Conference-Abstract]
    The material prices of poly bags skyrocket to new heights and forecasters see no end to this trend. Also legal restrictions are imposed on some types of polythene products. In this situation, any entrepreneur engaging in ...
  • Biodiesel production from high FFA Rubber Seed oil 
    Sampath, PRAU; Samarakoon, SPAGL; Ismail, FM; Gunawardena, SHP [Conference-Abstract]
    Sri Lanka should look at alternative fuel sources to reduce its dependence on foreign oils. Diesel is the highest used petroleum product in the transport sector. Biodiesel extracted from non edible oils like Rubber Seed ...
  • Car park navigating system 
    Dias, SAD; Abeywickrama, RV; Attanayake, AATI; De Silva, GRH; Domingo, DDAPC [Conference-Abstract]
    It is known that every working day millions of drivers are looking for a place to park and most of the urban traffic occur due to the drivers loitering in search of parking spaces. We wished to offer a simple solution to ...
  • Cleaner Production option for the Sri Lankan desiccated coconut Industry - bacterial cellulose from wastewater 
    Walliwala, SG; Ismail, FM; De Alwis, AAP [Conference-Abstract]
    The Desiccated Coconut (DC) industry is an important source of export earnings in Sri Lanka. However lack of energy and environmental conservation techniques have made the industry less competitive. In this study, the ...
  • Coir pith activated carbon for the removal of dyes from aqueous solutions 
    Dhanusekera, DW; Amarasinghe, BMWPK [Conference-Abstract]
    Adsorption of methylene blue, malachite green and nylosan blue dyes onto carbonized coir pith from aqueous solutions was studied. Adsorbent was prepared by carbonizing coir pith at 700 C for l hr. Batch experiments showed ...
  • The competitiveness of Sri Lankan apparel industry 
    Mataraarachchi, R; Heenkenda, N [Conference-Extended-Abstract]
    The apparel industry of Sri Lanka has survived for along period of time and the industry was successfully catered to the international market especially for US and EU market in the last two decades. Apparel exports still ...
  • Construction and demolition waste as a road construction material for flexible pavements 
    Jayasooriya, VWP; Kumara, MAW [Conference-Abstract]
    This research is focuses on evaluating the physical properties and durability characteristics of both demolition and process waste for flexible pavement construction. The initial results showed that there is a possibility ...
  • Construction and demolition waste as a road construction material in rigid pavement design 
    Gayani, JKU; Kumara, MAW; Nanayakkara, SMA [Conference-Abstract]
    This paper focus on investigation of properties of recycled aggregate and use of recycled concrete aggregates to partially or fully replaced natural aggregates in the production of lower grade concrete. Recycled products ...
  • Correlation between ultrasonic attenuation and hardness of tool steels 
    Dayananda, HGSM; Munasinghe, RGNDS; Sivahar, V [Conference-Abstract]
    Theory of propagation and reflection of ultrasonic waves in metals in used to locate the internal defects of engineering components. It is observed that the energy absorption of ultrasonic waves (attenuation) in a metal ...
  • Design and realization of pogrammable induction motor drive 
    Kurnarawadu, S; Ranindu, D; Rathnayakae, G; Sreeskanth, V; Sriragu, A; Sudarsan, Gl [Conference-Abstract]
    There are different algorithms available for speed control of induction motors, while every algorithm has its relative merits over the other. The inverters available in the market are mostly designed using application ...
  • Design of an ergonomically efficient chair 
    Gopura, RARC; Amarasena, KGAH [Conference-Abstract]
    Ergonomically designed chairs are important for long time seated workers to increase their productivity and also to reduce low back injuries due to use of poorly designed chairs in ergonomic aspects. In addition, ...