International Research Symposium on Pure and Applied Sciences (IRSPAS)

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Author: search.filters.author.Attanayake, A. M. C. H.Has files: Yes

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    Factors associated with severity of road accidents in Gampaha police division in Sri Lanka
    (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018) Madhubhashini, M. G. A. K.; Attanayake, A. M. C. H.; Sooriyaarachchi, D. J. C.
    Road accidents are main social problem in Sri Lanka, which causes immense damages and injuries unintentionally and unexpectedly. There are numerous factors, which contribute road accidents such as time of the day, road surface, weather, light condition, location, traffic density, traffic control availability, vehicle type, vehicle age, driver’s gender, driver’s age, license availability, usage of alcohol and etc. This study aims to identify the factors that mainly contribute to road accident severity in Gampaha Police Division through formulating an effective model. Altogether, 1375 data were collected from 2015 to 2017 from Police report of the Gampaha Police Division and the above mentioned 13 factors were considered. In this research 25% of the data were used for the validate the model and remain 75% of the data were used for build the model. Severity of accidents were categorized as fatal, grievous, damage only and non-grievous accidents. Chi-square test of independence has detected that road surface, light condition, location, traffic density, traffic control availability, vehicle type, driver’s age and usage of alcohol are the significant factors. The Location variable removed due to multicollinearity and remain significant factors used for Multinomial logistic model to model the severity of road accidents. The area under the ROC value was 59.2% for model building data and the area under the ROC value was 58.4% for model validation data. That means the developed model more accurately predicts the severity of accidents than the prediction in baseline model. Based on the results, it is discovered that traffic control availability increases the effect on the probability of a fatal accidents and fail of alcohol test, road surface and vehicle type decreases the effect on the probability of a fatal accidents. Moreover, traffic control availability and traffic density increase the effect on the probability of grievous category and alcohol test, vehicle type have negative impact on the probability of damage only accidents. Traffic density have positive impact on damage only accidents. The analysis shows different factors contribute a significant impact on the severity of road accidents. The result of this research is useful for police to understand factors affect on severity of road accidents and decrease the number of road accidents in future.
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    Study on the selection of mobile service providers: Special reference to the students at Faculty of Science, University of Kelaniya.
    (International Research Symposium on Pure and Applied Sciences, 2017 Faculty of Science, University of Kelaniya, Sri Lanka., 2017) 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.
    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 study is to understand the selection of mobile service providers in Sri Lanka by students of the Faculty of Science. The objectives are to identify the most popular mobile service provider among the students of the Faculty of Science and reason for it, categorize the most popular mobile service provider by gender, year of study and relationship type of students and measure the satisfaction on available facilities of service providers. A survey was conducted during the period of September – December 2016. Among the 1670 students registered in the Faculty of Science, 181 respondents were randomly selected using simple random sampling method (without replacement). An appropriate questionnaire was developed in order to gather data and achieve the objectives. After the initial pilot survey was conducted, a questionnaire was administered in person and online (for unavailable students) while personal interviews were also conducted to improve the response rate from students who had not responsed due to their heavy workload. The analysis reveals that the majority of students (67%) of the Faculty of Science preferred to use Mobitel, whereas 21% of the students preferred Dialog and only 5% of the students, used Airtel. Most of the female students (55%) preferred to use Mobitel as their mobile phone provider whereas 74% of male students preferred to use the same network. The main reason for their selection was cited as the providers’ wider coverage. The results remained the same for majority of students studying in the first, second, and third year. The results remained the same irrespective of the stuts, i.e. single, in a relationship or married category. When considering individual service providers, only Hutch users were 100% satisfied with their service. In conclusion, this survey discloses important findings about the selection of mobile service providers by students of the Faculty of Science.