International Research Symposium on Pure and Applied Sciences (IRSPAS): Recent submissions

  • Polarizability of a metallic nano-cylinder: Local random-phase approximation (LRPA). 
    Asela, A.U.; Hewageegana, P.S. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    We develop a method to calculate the polarizability of a nano-cylinder by taking temporal and spatial dispersion in to account where dispersion due to the Landau damping. To describe these phenomena, we developed analytical ...
  • Modeling Non-Isothermal wire-coating from a bath using Giesekus fluid. 
    Karunathilake, N. G. A.; Panda, S.; Mallawaarachchi, D. K.; Wijesiri, G. S.; Hansameenu, W. T. P. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    In this paper we extend the recent analysis of Giesekus isothermal viscoelastic fluid model by inclusion of temperature in the uni-axial flow which occurs in the wire-coating process. The wire-coating flow of incompressible ...
  • Approximate analytical solution to the time-fractional nonlinear Schrodinger equation through the Sumudu decomposition method. 
    Mathanaranjan, T.; Himalini, K. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    The time-fractional nonlinear Schrodinger equation has the following form:.... where dV is the trapping potential and d is a real constant. The physical model of above equation and its generalized forms arise in various ...
  • A mathematical model for a lubricant approximation of the wet thin tear film. 
    Ranathunga, G. P.; Karunathilake, N. G. A. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    The classical description of the tear film resides on the anterior surface of the eye between the upper and lower lids is a wet thin film. Various fluid dynamic model have been developed for the evolution of the surfactant ...
  • Thin shell model for Majumdar Papapetrou spacetimes. 
    Dilini, N. I.; Wimaladharma, N. A. S. N. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    Einstein – Maxwell field equations are nonlinear partial differential equations which are difficult to solve. Therefore different assumptions are needed to solve them. Also it is very hard to find properties of the matter ...
  • A new cosmological model including inflation, deceleration, acceleration and deceleration again. 
    Perera, P. V. N. M. C.; Katugampala, K. D. W. J. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    Since Perlmutter and Riess (1997; 1998) observed that the Universe expands with an acceleration, many models involving dark energy have been proposed to explain this phenomenon. A family of cosmological models with both ...
  • Economic determinants of suicides in Sri Lanka over the period 1975 – 2015. 
    Devindi, R. P. D. C. S.; Kulatunga, D. D. S. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    Suicide is a major public health problem in the world. According to the World Health Organization, every 40 seconds, a person commits suicide somewhere in the world. In Sri Lanka a steady increase of suicides has been ...
  • A study on the convergence of Σ.. in terms of the convergence of Σ... 
    Mampitiya, M.A.U.; Karunathilake, N. G. A.; Arachchi, D. K. M. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    The convergence or divergence of a given series is determined by the behavior of its partial sum. Various tests can be used to examine the convergence or the divergence of the series even in the absence of an explicit ...
  • Development and application of rice-straw biochar for removal of selected heavy metals (Pb, Cd and Cr) in contaminated paddy soil. 
    Irosha, K. P. C.; De Silva, D. S. M. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    Biochar which is derived from carbon rich biomass such as wood, manure and leaves, is increasingly recognized as multifunctional material for various applications like contaminant management in soil and water, soil amendment ...
  • Evaluation of solution parameters for CdCl2 solutions to be used in post-deposition treatments of CdTe thin films in CdS/CdTe solar cells. 
    Atapattu, H. Y. R.; Silva, D. S. M. D.; Pathiratne, K. A. S. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    Owing to its high absorption coefficient and the near ideal band gap, CdTe has become one of the topmost solar energy materials available for conversion of solar energy into electricity. It exhibits excellent power conversion ...
  • Assessment of polycyclic aromatic hydrocarbons and heavy metals in the vicinity of an oil refinery in Sri Lanka using moss as a bioindicator. 
    Nirmani, L. P. T.; Deeyamulla, M. P. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    Polyaromatic hydrocarbons (PAHs) and heavy metals are toxic compounds emitted from various anthropogenic sources and have a great effect on the human health as well as on the environment. Population living closer to the ...
  • Graphite oxide / TiO2 advanced hybrid material using Sri Lankan graphite: Synthesis and characterization. 
    Premaratne, W. A. P. J.; Fernando, K. D. G. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    Sri Lanka has deposits of vein graphite consisting of a high crystallinity and high purity (> 99 % of carbon). Graphite being a lamellar structure that is both electrically and thermally highly conductive, allows it to be ...
  • Reinforcement of natural rubber using carbon black / mineral hybrid filler. 
    Wanasinghe, W. M .P. G. S. V.; Jayasuriya, C. K. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    Fillers improve the properties of natural rubber. Carbon black is the most abundant reinforcing filler in industry and is derived from the petroleum feed stock. There is a complex and expensive process to obtain Carbon ...
  • Factors affecting to the output efficiency of a production department: A case study in Sri Lankan apparel industry. 
    Erandi, M. W. A.; Jayasundara, D. D.M. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    Output efficiency of a production department is essential for increasing the profit of an organization while satisfying the customers. A learning was regulated in a foremost apparel manufacturing factory in Western province. ...
  • Enhancement of the degradation of vulcanized natural rubber by natural fatty oils. 
    Ruhunage, C. K.; Jayasuriya, C. K. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    The overall use of natural rubber for a large number of applications is constantly on the rise and results in a growing volume of rubber waste. The cross-linked structure of rubber and the presence of stabilizers cause ...
  • A class of s-step non-linear iteration scheme based on projection method for s-stage Runge-Kutta method. 
    Kajanthan, S.; Vigneswaran, R. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    A variety of linear iteration schemes with reduced linear algebra costs have been proposed to solve the non-linear equations arising in the implementation of implicit Runge-Kutta methods as an alternative to the modified ...
  • Study on the selection of mobile service providers: Special reference to the students at Faculty of Science, University of Kelaniya. 
    Dassanayake, D. A. R. C.; Wijayawardhana, H. N. A. M.; Premathilaka, L. M.; Senarath, S. A. K. B.; Weerasekara, W. M. D. D.; Thilakarathne, K. H. K. D. S.; Goonetilleke, H. R.; Sandaruwan, B. H. S.; Winisinghe, W. T. D.; Kumara, J. L. S. M.; Attanayake, A. M. C. H. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    Mobile service providers are important in the rapid development of telecommunication and information technology. Major mobile service providers in Sri Lanka are Dialog, Mobitel, Airtel, Etisalat and Hutch. The aim of this ...
  • Survey on usage of university main library by undergraduates of Faculty of Science, University of Kelaniya. 
    Sandamali, L. B. U.; Dhananjani, G. L. I.; Manchanayake, M. A. S. N.; Perera, M. S. H.; Madhushika, P. A. L.; Jayasanka, P. G. Y.; Edirisinghe, E. C. D.; Premathilaka, R. A. N. M.; Rajapaksha, M. O. S.; Senewirathne, A. P. D. S.; Attanayake, A.M.C.H. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    The main library of the University of Kelaniya plays a major role in advancing knowledge of its users. It provides a huge collection of reading materials for reference use or lending. The aim of this study is to understand ...
  • Factors associated with low birth weight babies in Jaffna, Sri Lanka. 
    Nimantha, D. J.; Varathan, N. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    Low birth weight (LBW) is a major public health problem in many countries including Sri Lanka. It is a leading cause of prenatal and neonatal deaths resulting in severe short term and long term effect on babies. The World ...
  • Factors that affect labour induction and its successfulness of pregnancies in Sri Lanka. 
    Gunawardana, J. R. N. A.; Perera, S. S. N. (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017)
    Induction of Labour (IOL) is an important practice that is carried out commonly in modern day obstetrics. In medium to large health care facilities, it is estimated that approximately 35.5% of all deliveries involve IOL ...

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