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

  • Effect of substrate temperature variation on opto-electronic properties of thermally evaporated CdS thin films 
    Lakmal, A. A. I.; Kumarasinghe, R. K. K. G. R. G.; Maddumage, D. C.; Kumarage, W. G. C.; Munasinghe, M. A. H. M.; Seneviratne, V. A.; Dassanayake, B. S. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    Cadmium sulfide (CdS) is a II-VI group semiconducting material which has been thoroughly investigated due to its superior optical and electrical properties that can be applicable in wide range of semiconductor devices ...
  • Fabrication of natural dye sensitized solar cells with eastern black nightshade extract. 
    Kulathilaka, D. S. V.; Wanninayake, W. T. M. A. P. K.; Jayathilaka, K. M. D. C.; Wijesundera, R. P. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    Energy crisis is one of the biggest challenges for the humans in the world today. Considerable efforts have put by many researchers to tackle this issue. Solar cells represent critical role for extracting energy from the ...
  • Fabrication of efficient dye - sensitized solar cell using the dye of Chinese rain bell flower 
    Jayarathna, S. R. N. T.; Wanninayake, W. T. M. A. P. K.; Jayathilake, K. M. D. C.; Wijesundara, R. P. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    Available solar energy converting devices are comparably expensive and cutting down the cost of the PV devices is a prime need. Therefore, fabrication of PV devices with low cost materials and techniques is very important. ...
  • Stable forecasting of tax revenues of selected countries assisted by Clustering Approach 
    Karunarathne, A. W. S. P.; Liyanage, U. P.; Hewaarachchi, A. P. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    Tax is one of the main income of a government that utilizes in public welfare and future investment. Taxation has goals: reducing the inequalities through a policy of redistribution of income, administrating the levels of ...
  • Modelling and forecasting the income of pepper exports in Sri Lanka 
    Weerasinghe, W. P. M. C. N.; Jayasundara, D. D. M. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    Pepper is the most significant and widely used spice in the world. Currently about 60% of pepper production of Sri Lanka is exported while the remainder is consumed domestically. Sri Lanka is the fifth largest exporter of ...
  • A clustering based quantitative approach on selecting companies in an investment portfolio in Colombo Stock Exchange 
    Kumara, M. S. M. S.; Liyanage, U. P. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    Portfolio management is a powerful concept in financial sector, heavily studied by both investors and researchers. Conventionally, investment portfolios on stocks available in stock markets, constitute by set of stocks ...
  • A study on Dengue spread in Western province: using Spatial and Cluster analysis. 
    Kethmi, G. A. P.; Premarathna, L. P. N. D. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    Dengue virus is transmitted to humans through the bite of infected Aedes mosquitoes, mostly Aedes aegypti. According to National dengue control unit of Sri Lanka, the recent outbreak of dengue fever in the country was ...
  • Periodic time series modeling for temperature data in Nuwara Eliya 
    Wijayawardhana, H. N. A. M.; Hewaarachchi, A. P. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    Many climatological time series display interesting properties such as trend, seasonality and autocorrelation. In addition to the autocorrelation, some time series display periodic autocorrelation, which is not readily ...
  • Constructing a new polygroup from a given polygroup induced by the double cosets of a group 
    Thushanthani, R. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    A polygroup theory is a branch of the hyperstructure theory that generalizes the classical algebraic theories. A polygroup is a multi-valued algebraic structure and basically, polygroups are groups like objects. Groups are ...
  • On level two analogue of Arakawa-Kaneko zeta function and poly-cosecant numbers 
    Pallewatta, M. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    We study the level two generalization of Arakawa-Kaneko zeta function originally studied by T. Arakawa and M. Kaneko. We obtain certain new formulas for the level two analogue of Arakawa-Kaneko zeta function. Also, we study ...
  • Hardware architecture for superoxide production in CKDu initiation 
    Upamalika, S. W. A. M.; Vidanagamachchi, S. M.; Wannige, C. T. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    Simulation of molecular mechanisms of a disease is important in drug discovery and treatments of the disease. There are many difficulties in performing extensive biological experiments to investigate of a disease with ...
  • Viscous airflow connected to a compressed Air-shoe 
    Munasinghe, J. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    Viscous concentric airflow in between two parallel circular discs has been considered. Since the gap in between the plates is small, Prandtl boundary-layer equations were used to explain the flow. In order to solve these ...
  • Expanding universe with a time-dependent cosmological constant 
    Jayawardane, S.; Katugampola, K. D. W. J.; Hewageegana, P. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    It is possible to examine the expansion of universe with an accelerating epoch. The prophecy of an expanding universe from Einstein's Field Equations were affirmed by the perceptions of Edwin Hubble and Adam G. Reises in ...
  • A mathematical model to analyze the dynamics of Dengue transmission: A case study based on Western Province, Sri Lanka 
    Gammune, D. H. V.; Premarathna, L. P. N. D. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    Dengue fever, which is a rapidly spreading mosquito-borne viral disease, has become a major public health problem in the world, including Sri Lanka. The Western Province of Sri Lanka has been experiencing a very high number ...
  • Empirical computation of changes in Mean Sea Level around Sri Lanka Vertical Datum 
    Dilakshi, K. A. L.; Munasinghe, J. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    Tides occurs as the combined effects of the gravitational forces exerted by the moon and the sun and rotation of the Earth. Mean Sea Level (MSL) is the mean height of the surface of the sea and vertical datum of Sri Lanka ...
  • Tracking problem of 1D damped translational mechanical system for harmonic signals 
    Leelarathne, H. M. A. K.; Hansameenu, W. P. T. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    The translational mechanical systems play a major role in engineering systems such as automobile shock absorbing system, stock bridge damper, motion sensor etc. However, the damping influence of the translational mechanical ...
  • Management of a threatened reef to establish its ecosystem sustainability through inter-agency coordination mechanism: A case from Kayankerni, Eastern Coast of Sri Lanka 
    Weerasinghe, K. D. I.; Kumara, P.B.T.P.; Perera, N.; Subasinghe, M. M.; Gunasekara, A. M. J. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    Sri Lanka is considered as one of the biodiversity hotspots in the world due to its richness and tremendous value of biodiversity. Among these hotspots Kayankerni Coral Reef Ecosystem, located in Eastern coast of Sri Lanka ...
  • An exploration of women’s experience following Post-Partum Hemorrhage 
    Wickramanayake, A. N. D. S.; Jayasena, H. P. G. C. T.; Gunasekara, W. G. C. L.; Hemachandra, A. B. N. U.; Kumari, L. Y. S. S.; Siriwardane, E. W. A. I. M. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    Post-partum hemorrhage (PPH) is recognized as a leading cause of maternal morbidity and mortality. Assessing physiological and emotional experiences of mothers who experienced PPH could contribute to improved treatments ...
  • General hygienic condition of packaged lettuce samples purchased from selected supermarkets in Gampaha district, Sri Lanka 
    Lokuwalpola, D. V.; Wanigasekara, D. N.; Sudesh, A. D. H.; Karunarathne, E. D. C. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    Lettuce (Lactuca sativa) is usually consumed in raw form or processed minimally. Therefore, consumption of contaminated raw lettuce is associated with food outbreaks due to poor hygienic condition. Lettuce leaves can be ...
  • Development of sausages from immature jackfruit (Artocarpus heterophyllus) with rice bran fermented with Lactobacillus delbrueckii subsp. bulgaricus 
    Tharaka, H. M. D.; Yapa, P. N.; Bamunuarachchige, C. T. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
    Jackfruit (Artocarpus heterophyllus) is used as a food and for primary healthcare in traditional medicine of Sri Lanka for a long time. A survey was carried out in Mihintale Divisional Secretariat, North Central Province ...

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