Browsing ERU - 1999 by Title

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  • Lamp driver & failure detector for incandescent lamps in traffic signal systems 
    Jayasinghe, JAKS; Ranaweera, RAKP [Conference-Full-text]
    The design and implementation of a low cost solid-state lamp driver and failure detector (LD/FD) for incandescent lamps is described. The design is directly targeted for the signal lamp heads in highway traffic signal ...
  • Multiprocessor architecture for adaptive control of traffic light systems 
    Jayasinghe, JAKS [Conference-Full-text]
    Construction of new highways or expansion of existing highways to meet the ever- increasing highway traffic is a very expensive and time-consuming task. Management of existing highways effectively is considered as a high ...
  • Online automatic charger for maintenance free sealed battery supplies 
    Jayasinghe, JAKS; Ranaweera, RAKP [Conference-Full-text]
    The design and implementation of a high performance, automatic battery charger is described. The main target application of the design is for on-line battery backup systems requiring high reliability such as highway traffic ...
  • Optical character recognition for sinhala text using feature analysis 
    Watugala, GK; Kumara, WMP [Conference-Full-text]
    Optical Character Recognition (OCR) is now a reality for documents printed in English. In the present study, the groundwork for the recognition of Sinhala characters is done. Matrix Matching and Feature Analysis are the ...
  • Performance of an electronic energy meter 
    Ranaweera, A; Wickramaratne, LS [Conference-Full-text]
    In this paper the principle of operation, implementation and performance of an integrated circuit based electronic energy meter are described. Comparison is made of the performance of the electronic energy meter with that ...
  • Prediction settlements of foundations on soft soils - a case study 
    Thilakasiri, HS; Peiris, TA; Tennakoon, BL [Conference-Full-text]
    Excessive settlement of engineering structures and subsequent correction procedure have become a major concern for both the public and the engineering community. The severity of the above problem has increased due to the ...
  • Proceedings of the Annual Symposium 1999 (Pre Text) 
    Hettiarachchi, P [Conference-Full-text]
  • Radio telemetry receiver 
    Branavan, SRK; Gunasekera, HMG; Nandasiri., NHANL [Conference-Full-text]
    A narrow band tunable radio telemetry receiver capable of operating over the license free bands of 26.9 - 27.3 MHz and 46 - 50 MHz was designed. The receiver is tuneable within the specified frequency bands, and supports ...
  • Refrigeration system for Sri Lankan fishing boats 
    Wimalsiri, WK; Weerakoon, DAW; Weerasinghe, NMC; Fernando, MJP [Conference-Full-text]
    The fisheries sector in Sri Lanka has been expanding during past decade with growing local demand and export of fish. In order to cope with the demand, the size of fishing boat used for multi-day, deep-sea fishing has now ...
  • Retrofitting of a r-12 based domestic refrigerator to run on r-134a 
    Attalage, RA; Sugathapala, AGT; Perera, KKCK [Conference-Full-text]
    The possibility of operating a domestic vapour compression refrigerator system by replacing its existing Chloro-Fluro-Carbon (CFC, or R-12, or Freon-12) refrigerant with the Ozone friendly new refrigerant R- 134a has been ...
  • Silicone-wax filler to give stain resistance to cement, tile, terrazzo, terra cotta, marble, granite and timber surfaces 
    Perera, SAS [Conference-Abstract]
    The Silicone-Wax Filler discussed in this paper was developed for a reputed porcelain tile manufacturing company for use as a surface filler/sealer to a grade of floor tile called the polished tile, to make the tile stain ...
  • Simple monte carlo simulation using matlab 
    Indralingam, M [Conference-Full-text]
    Many computer programming languages are currently available for various computing needs. MATLAB is one language which is most suitable for all scientific programming. Many engineers and scientists have not understood or ...
  • Smart cache for central offline download system 
    Bandara, S; Dias, G [Conference-Full-text]
    In Sri Lanka the communication links to the Internet are heavily congested during the peak hours. But they are not fully utilized during the off-peak hours such as in the night. Downloading a large file is an impossible ...
  • Stabilised soil block technology for Sri Lanka 
    Jayasinghe, C; Perera, AADAJ [Conference-Full-text]
    Due to the high cost and environmental problems associated with burnt bricks and cement blocks used as walling materials, cement stabilized compressed earth blocks have been introduced as a timely alternative. The design ...
  • Structured modeling approach to modelbase management system in a decision support system 
    Indralingam, M [Conference-Abstract]
    General Decision support Systems first appeared in the early 1970's. Though a MIS might alert a manager to the fact that a problem existed, it was felt that it did not necessarily help in solving it. There was obviously a ...
  • Surface source model for confined flow past a circular cylinder in a symmetrical configuration 
    Sugathapala, AGT [Conference-Full-text]
    Aerodynamic tests of rigid bodies and structures are usually carried out in wind tunnels using scale-down models under controlled flow conditions. Presence of the tunnel walls causes the test conditions to deviate from the ...
  • Techniques for secure electronic transactions 
    Amarasiri, R; Dias, G [Conference-Full-text]
    As the use of Internet becomes a day to day activity of people, and purchases over the Internet are becoming everyday necessities, secure methods of paying for such purchases have become very important. The need to provide ...
  • Transplan v2: a regional traffic estimation model 
    Kumarage, S; Bandara, JMSJ; Wijeratne, IK; Vidyarathne, MGG [Conference-Full-text]
    Traffic estimation is necessary in order to understand future scenarios of transport demand. Most regional traffic models that are presently available are those that have been calibrated in developed countries. They are ...
  • Use of mutidimensional modeling in a decision support system OFA bank 
    Indralingam, M [Conference-Full-text]
    Computers are widely used in decision making in many financial institution. Decision Support System (DSS) concepts are generally used for this purpose. Recently new modeling techniques are introduced to enhance the Model ...
  • Wall effects on the performance of ceiling fans: a two-dimensional model 
    Sugathapala, AGT [Conference-Full-text]
    The distance between the rotor and the ceiling wall is known to have a significant effect on the performance of ceiling fans, especially at a close proximity. A simplified ideal fluid flow model is developed to analyse ...