Research Publications: Recent submissions

  • Nanayakkara, N; Nakamura, M; Hatazaki, H [Article-Full-text]
    This paper proposes a pitch-control technique for grid-connected wind turbines in a small power system with low sywtem inertia. Wind turbines in such a power system give rise to poor quality of power and low system ...
  • Ranasinghe, M [Article-Full-text]
    In Sri Lanka at present, the mining of clay for the production of bricks and roof tiles is mechanized. The result of mechanized mining is deep pits left along river basins. These pits get filled with water during the wet ...
  • Ranasinghe, M [Article-Full-text]
    A simplified model for total project cost is developed in this paper to meet the numerous requests from decision makers for a model that can be used to estimate the total project cost from the estimated cash flows and, ...
  • Ranasinghe, M [Article-Full-text]
    A theoretical approach is presented for contingency allocation and management in building projects using the quantification of uncertainty of project cost. The uncertainty of input items to a bill of quantities, namely, ...
  • Ranasinghe, M [Article-Full-text]
    This paper develops a theoretical basis for three issues that are important in the quantification and management of uncertainty in activity duration networks. Firstly, the uncertainty in activity durations is quantified. ...
  • El-Shazly, AK; Worthing, MA; Jayawardane, J; Varne, R [Article-Full-text]
    Field and petrological data, combined with major, trace and rare earth element analysis of mafic rocks that structurally underlie the Semail ophiolite in Saih Hatat, have led to their subdivision into five groups: (a) ...
  • Gunasekera, MY; de Alwis, AAP [Article-Full-text]
    Accidents in the process industry could be prevented or reduced by having good safety management measures. Such preventive measures could be further improved through the experiences and lessons learnt from past ...
  • Dias, WPS; Seneviratne, GAPSN; Nanayakkara, SMA [Article-Full-text]
    A figure of 0.075% by weight of sand was arrived at as a safe limit for allowable Cl ion content in offshore sand for OPC based reinforced concrete. A 2 m high sand column was fabricated for checking the effects of natural ...
  • Edirisinghe, EANS; Lakmal, RAP; Lakshitha, TGG; Sirimanna, SWDTS; Jayasekara, AGBP [Conference-Full-text]
    A vast range of human-friendly interactive robotic heads is being developed by researchers. However these robot heads require improvements in construction and behavior to achieve more human-like performance. Therefore this ...
  • Kalpage, KMT; Peiris, KRD; Perera, KAIRP; Siriwardana, MGCI; Lidula, NWA; Wickramarathna, MTAP [Conference-Full-text]
    In deploying a large scale wind power plant, there are several aspects that have to be assessed. Among them the initial site screening for wind power plants, wind data assessment and proper selection of wind turbines are ...
  • Pathirana, MGK; Perera, KTK; Sirithunge, HPC; Srimal, PHDAS; Jayasekara, AGBP [Conference-Full-text]
    This paper focuses on designing and simulation of an interactive robotic arm for pick and place and service applications. The robot is expected to have image processing and voice recognition capability. The mechanical ...
  • Abeyrathne, PM; Abeysinghe, AMGT; Karunanayake, IM; Ranasinghe, PMH; Dias, MP; Lucas, JR [Conference-Full-text]
    High Voltage Direct Current (HVDC) links are used for bulk power transmission due to its advantages over the alternating current (ac) transmission. A HVDC link between India and Sri Lanka has also being proposed. Hence it ...
  • Kattriarachchi, KG; Arachchige, VO; Kanchana, LG; Gunaratna, RDDCY [Conference-Full-text]
    Voltage unbalance (VU) is regarded as a power quality problem of significant concern at the electricity distribution level. Influence of unbalanced supply voltages on the adverse performance of power system and its equipment ...
  • Gunawardana, SDMS; Kanchana, AAT; Wijesingha, PM; Perera, HAPB; Samarasinghe, R; Lucas, JR [Conference-Full-text]
    Failures in high voltage equipment are often caused due to internal faults which cause a local electrical stress concentration in the insulation; called as partial discharge. Therefore partial discharge detection is highly ...
  • Chanaka, AKK; Jayawardhana, GC; Lionel, LHTD; Bolonne, SRA [Conference-Full-text]
    Wireless power transfer can make an extraordinary change in the field of the electrical engineering which eliminates the use of conventional copper cables and current carrying wires. In this paper, we present the concept ...
  • Unknown author [Conference-Full-text]
  • Udayanga, S; Weragoda, SC; Alahapperuma, KG [Conference-Full-text]
    Polyvinyl Chloride (PVC) based roofing sheets are widely used in industrial and domestic applications today. It is recognized that ultraviolet rays (UV) in sunlight (wavelengths between 280 nm and 400 nm) cause photodegradation ...
  • McCarter, WJ [Article-Full-text]
    Long-term durability of highway structures is, and will for the forseeable future, be a major problem facing engineers. Movement of deleterious ionic species in solution through the cover region and the resulting corrosion ...
  • Ranasinghe, M.; Russell, AD [Article-Full-text]
    This paper investigates three major issues regarding the elicitation of expert knowledge for economic risk analysis: (1) recognition of some of the implicit assumptions and beliefs; (2) development of an approach to elicit ...
  • Rameezdeen, R; Rajapakse, C [Article-Full-text]
    The standard form of contract plays a significant role in a construction project as it communicates the procedures to be adopted in executing the project including the determination of the rights and obligations of contracting ...