ERU - 1999: Recent submissions

  • Proceedings of the Annual Symposium 1999 (Pre Text) 
    Hettiarachchi, P [Conference-Full-text]
  • 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 ...
  • 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 ...
  • 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 ...
  • Energy efficiency in office buildings: lighting sector 
    Fernando, WJLS; Wijayatunga, PDC; Ranasinghe, S [Conference-Full-text]
    Efficient utilisation of energy is considered to be one of the main tools of controlling the ever increasing demand for energy, especially in developing countries where there is a large potential for improvement. In recent ...
  • 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 ...
  • 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 ...
  • Feasibility of vapour absorption based air- conditioning in industries: a case study 
    Wijayatunga, PDC; Attalage, RA; Sugathapala, AGT [Conference-Full-text]
    This paper presents the results of financial and technical feasibility of vapour absorption based air- conditioning systems (VAAC) in an industrial environment in comparison to vapour compression based systems (VCAC). The ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • An electronic ampere-hour meter 
    Ranaweera, A; De Silva, WNH; Eranjeewa, AAT; Epa, DJ; Kandeepan, K [Conference-Full-text]
    The electronic ampere-hour meter does not require any voltage supply and its operation is based on the magnetic coupling to electrical conductors feeding consumer's load. A capacitor inside the meter is charged at a rate ...
  • A generic approach for developing dedicated database systems for professional applications 
    Nanayakkara, LDJF; Ganesapiragas, S [Conference-Full-text]
    There are many benefits to be reaped by organizations of small and medium size by encouraging and exploiting the motivations non-IT engineering professionals possess for programming applications for day- to-day use. Potential ...
  • 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 ...
  • 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 ...
  • Estimation of annual collectible energy by flat plate solar thermal collectors: case study of Colombo 
    Hewawasam, GDK; Attalage, RA [Conference-Full-text]
    The Utilizability concept has been adopted as a design method for flat plate solar thermal collector sizing. Hourly & Daily utilizability curves on a monthly time scale have been generated for the city of Colombo using ...
  • 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 ...