Browsing by Year "2004"

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  • Influence of drying on concrete sorptivity 
    Dias, WPS [Article-Abstract]
    The experimental programme described in this paper indicated that concrete grade and specimen preconditioning were the major factors influencing sorptivity, whereas specimen size and coating had relatively little effect. ...
  • Investigations of wave reflection and transmission through gabion structures 
    Hettiarachchi, SSL; Amaraweera, R; Fernando, KPM [Conference-Extended-Abstract]
    This paper presents results from investigations carried out on the hydraulic performance of gabion structures, with respect to wave energy reflection and transmission processes. The focus of the study was to investigate ...
  • A Market-Based Approach to control Web Bandwidth Usage 
    Disanayake, C; Dias, G; de Silva, CR [Article-Abstract]
    We have designed and implemented a proxy-based system which allows each user to request, and obtain a desired amount of bandwidth for web access. Bandwidth is priced dynamically based on the demand at any given time. This ...
  • Material wastage in construction sites: identification of major causes 
    Kulatunga, U; Rameezdeen, R [Article-Abstract]
    This paper summarizes the results of a study, which quantified the material wastage in construction sites in Sri Lanka. The paper intends to provide the magnitude of waste, its causes and how it could be minimized. In ...
  • Modeling of tensile behavior of carbon-black filled rubber compounds 
    Weragoda, VS; Kumara, PWRU; Samarasekara, AMPB [Conference-Extended-Abstract]
    Natural rubber is a well known polymer which is both flexible and highly elastic. However, this material in its virgin state lacks the thermal stability and mechanical properties needed for practical applications. After ...
  • Oil spills - risk analysis and modelling the potential impacts along the South- West coast of Sri Lanka 
    Samarawickrama, SP; Hettiarachchi, SSL; Welhena, T [Conference-Extended-Abstract]
    Oil enters the marine environment by a number of different routes as a result of both human activities and natural processes. Tanker accidents account for about 12% of the total amount of oil entering the oceans, which is ...
  • Passive cooling in the tropics : a design proposition for natural ventilation 
    Rajapaksha, I [Conference-Abstract]
    This paper explore the effects of indoor airflow behaviour in modifying the indoor thermal conditions in a courtyard residence found in the tropics. The design theme is centred towards an exploitation of architectural ...
  • Proceedings of the 10th annual symposium 2004 (Pre Text) 
    Dias, D [Conference-Extended-Abstract]
  • Quality based energy contents and carbon coefficients for building materials: A systems approach 
    Dias, WPS; Pooliyadda, SP [Article-Full-text]
    This paper describes a computerised relational database management system to represent and calculate (i) the energy inputs to a building material or element up to the point of utilisation or construction and (ii) the carbon ...
  • Regional flood estimation by canonical correlation 
    Gamage, NPD [SRC-Report]
    Canonical Correlation is an additional procedure for assessing the relationship between variables. Canonical Correlation permits one to establish the interrelations that may exist between two groups of variables, by ...
  • Rice bran oil extraction in Sri Lanka: Data for process equipment design 
    Amarasinghe, BMWPK; Gangodavilage, NC [Article-Full-text]
    Rice bran oil is widely used in pharmaceutical, food and chemical industries due to its unique properties and high medicinal value. In this study, extraction of rice bran oil from various brands of rice bran available in ...
  • Steam as an alternative fluid for air in air-jet intermingling 
    Wickramasinghe, GLD; Foster, PW [Conference-Extended-Abstract]
    The yarn texturing industry is currently processing over five million tons of filament yarn annually. There are different texturing methods such as false-twist texturing, stuffer-box, edge crimping, gearmesh, air-jet ...
  • A study on the adequacy of specificationsc used for building construction in Sri Lanka 
    Gunawardena, ND; Nismy, RM [Conference-Extended-Abstract]
    Since the introduction of ISO 9000 quality standards, the pursuit of quality assurance has become a dominant theme in many industries; the construction industry is no exception. Organisations adopt quality assurance systems ...
  • Treatment of silver (Ag) containing effluents using electrodialysis 
    Botheju, PDC; Wijeyekoon, SLJ; Jayaweera, MW; Dissanayaka, DMDOk [Conference-Extended-Abstract]
    Electrodialytic recovery of Ag+ ions from industrial effluents (basically photographic effluent.s~ was.",) investigated with the aim of reclaiming and recycling of the metal Ag, mainly considering the fact that Ag being a ...
  • Tripartite collaboration - What? Why? and How 
    Fernando, MARV [Conference-Extended-Abstract]
    In this era of 'innovate or perish' it is essential for all industries to be innovative not only in product design but also in manufacturing technology to be competitive in quality and productivity as well. A 'Technological ...
  • A Tropical courtyard building as an upwind air funnel 
    Rajapaksha, I; Nagai, H; Okumiya, M [Conference-Abstract]
    The paper presents a tropical courtyard as a design strategy in promoting indoor air movement within a single storey dwelling. The results of a computer simulation (CFD) carried out for indoor airflow pattern reveals that ...
  • Virtual drum: using computer vision for musical expression 
    De Silva, GC [Conference-Extended-Abstract]
    Musical instruments are transducers that convert forces applied by a human being into a c1~~s of .•.:l audio signals. With the availability of electronic devices that not only amplify the sounds generated, but also synthesize ...
  • Vision based object tracking for virtual reality games 
    Wijesena, IJP; De Silva, CR [Conference-Extended-Abstract]
    Today, many sportsmen and sportswomen in Sri Lanka face the problem of improving their technique, "' due to the lack of qualified coaches. The few good trainers in Sri Lanka find it difficult to prOvide ..•. J their services, ...
  • Web traffic optimization using dynamic bandwidth negotiation 
    Gamage, S; Dias, G [Conference-Extended-Abstract]
    Using the Internet is becoming a necessity even in areas with a shortage of affordable bandwidth. Many organizations and ISPs in Sri Lanka (and around the world) are facing the problem of using a small amount of bandwidth ...