Browsing by Author "Dias, WPS"

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  • Dimensions of order in engineering design organizations 
    Dias, WPS; Subrahmanian, E; Monarch, IA [Article-Full-text]
    Design practice and artifacts in engineering design organizations can be ordered along four orthogonal dimensions, namely (i) the principle of ordering (top down vs bottom up), (ii) the structure of ordering (aggregation ...
  • Drying of gum resin on a drum dryer 
    Michel, K [Conference-Full-text]
    A viscous solution of gum resin with about 50% water has to be concentrated without changing the quality of the solved material and by reaching a reasonable bulk density. On a double drum drier, 120 mm diameter and 150 ...
  • Durability indicators of OPC concretes subject to wick action 
    Dias, WPS [Article-Full-text]
    Durability indicators for six OPC concrete mixes were obtained from wick action testing on concrete cylinders placed in water and a sodium chloride solution of concentration similar to sea water. Although 49 weeks of ...
  • Effects of Large Retarder Overdose on Concrete Strength Development 
    Dias, WPS; Dewapriya, MAN; Edirisooriya, EACK; Jayathunga, CG [Article-Abstract]
    Retarders are used to delay the setting time of concrete. Retarder overdosing is not an uncommon problem, but its effects are not well understood. In this study, laboratory tests were conducted to determine the effect of ...
  • Engineering and society— the power of analogy 
    Dias, WPS; Ekanayake, E [Article-Abstract]
    There is an old saying that 'everything has been done before somewhere'. It is particularly true In civil engineering, where design teams are often accused of 'reinventing the wheel' simply because they have not read the ...
  • Evaluating adaptation measures for reducing flood risk: A case study in the city of Colombo, Sri Lanka 
    Wagenaar, DJ; Dahm, RJ; Diermanse, FLM; Dias, WPS; Dissanayake, DMSS; Vajja, HP; Gehrels, JC; Bouwer, LM [Article-Full-text]
    Many cities around the world face frequent problems with flooding, which is expected to get worse due to anthropogenic climate change and further urbanization. To tackle these problems often local infrastructural adaptation ...
  • Factors Influencing the Service Life of Buildings 
    Dias, WPS [Article-Abstract]
    The service life of a building depends mainly on its chief structural materials and the environment it is placed in. This paper collates the evidence from condition surveys conducted on some buildings with ages of up to ...
  • Feature based recognition of hand print characters 
    Wijesoma, WS; Siriwardene, IP [Conference-Full-text]
  • Field survey and numerical modelling of cracking in masonry walls due to thermal movements of an overlying slab** 
    Dilrukshi, KGS; Dias, WPS [Article-Abstract]
    Concrete slabs exposed to direct sunlight experience temperature related horizontal movements. In addition, temperatures on the top surface will be higher than those on the underside of the slab, causing an upward ...
  • Fragility curves for structures under tsunami loading 
    Nanayakkara, KIU; Dias, WPS [Article-Full-text]
    Susceptibility to structural damage can be characterized by a fragility curve, which is expressed as a normal or lognormal cumulative distribution of the conditional probabilities of reaching or exceeding a particular ...
  • Fragility curves for tsunami loading 
    Dias, WPS; Nanayakkara, KIU
    Vulnerability to structural damage can be characterized by a fragility curve, which is expressed as the conditional probability of reaching or exceeding a particular damage state, expressed by a lognormal cumulative ...
  • Heidegger's relevance for engineering: Questioning technology 
    Dias, WPS [Article-Full-text]
    Heidegger affirmed traditional technology, but was opposed to science-based modern technology, in which everything (including man) is considered to be a mere “resource”. This opposition was expressed in the form of deep ...
  • Heidegger’s resonance with engineering: The primacy of practice 
    Dias, WPS [Article-Full-text]
    This paper describes how some aspects of Martin Heidegger’s philosophy resonate strongly with an engineering outlook. He argued that practice was more “primordial” than theory, though preserving an important role for ...
  • High volume fly ash mixes supplemented with colloidal nano silica 
    Nanayakkara, KD; Dias, WPS [Conference-Abstract]
    Since cement manufacturing causes 7- 8% of total global CO2 emissions, attempts have been made to minimize cement consumption. One method is to introduce pozzolans, commonly fly ash (FA), as supplementary materials to ...
  • How to introduce new technologies 
    Punchihewa, A [Conference-Full-text]
  • Identifying vulnerability to blast loading using grounded theory 
    Chandratilake, SR; Dias, WPS [Conference-Extended-Abstract]
    A blast event lies within the social system and involves people. Hence vulnerability to blast loading can be considered a socio-technical or "soft" system, where our ability to model and hence predict bounds on behaviour ...
  • 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. ...
  • Influence of mix and environment on plastic shrinkage cracking 
    Dias, WPS [Article-Full-text]
    The influence of mix constituents (including corresponding concrete grade), retarding and air entraining admixtures and PFA additives, and the effect of environmental factors on plastic shrinkage cracking of mortar specimens ...
  • Influence of setbacks on the performance of high-rise buildings under blast loadings 
    Jayatilake, IN; Dias, WPS; Jayasinghe, MRT; Thambiratnam, DP [Conference-Extended-Abstract]
    With the increase in terrorism worldwide, blast loading has received considerable attention. In January 1996, a 400kg bomb exploded at the entrance of the Central Bank Building in Colombo causing extensive damage. Blasts ...
  • International Journal of Disaster Resilience in the Built Environment 
    Matzenberger, J; Hargreaves, N; Raha, D; Dias, WPS
    The purpose of this paper is to outline different notions of the term resilience used in scientific disciplines and consequently explore how the concept can be applied to energy systems. The concept of resilience has ...