KICACT 2017
Permanent URI for this collectionhttp://repository.kln.ac.lk/handle/123456789/17369
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Item Virtual Learning – A Popular Learning Method Among Students.(Faculty of Computing and Technology, University of Kelaniya, Sri Lanka., 2017) Abeysinghe, A.A virtual learning environment (VLE) or e-learning is a popular method of learning at present. But VLE depends on student acceptance of such kind of programs; if they prefer e-learning or classroom learning. Though VLE could save time, cost, space and motivate students to learn in a new dilemma, VLE poses several drawbacks in addition to those experienced by traditional methods of learning. These include difficulties in adapting to this system of learning, lack of computer literacy, lack of student motivation as well as technical issues. This trend is prominent, especially in developing countries where students are still in the process of adapting to a web and mobile app-based culture of learning. Also, students in developing countries often face problems of low speed Internet as well as lack of Internet access. Therefore, this research focuses on how switching from a traditional culture to an Internet-based culture could be achieved and how distance learning could be promoted in the distant world thus minimizing the digital divide. This research focused on solving these issues under four main themes: providing foundation on how websites and mobile apps could be used, providing streaming and caching facilities for slow Internet connections, creating surveys among students from different demographic, ethnic and geographic backgrounds and designing courses appropriately and ensuring multilingual course availability. According to the research, it was found that these solutions could be achieved in the near future with the advancement of the Internet and new technologies in developing countries. As such, it was inferred that virtual learning could be promoted as a learning method among students in developing countries.Item 5G Wireless Communication over Heterogeneous Networks: Solutions for Hardware and Software Fallacies.(Faculty of Computing and Technology, University of Kelaniya, Sri Lanka., 2017) Abeysinghe, A.Proliferating use of mobile communications have urged the need to develop networks able to cater to higher bandwidth, speeds and support a plethora of upcoming technologies. Introduction of 5G networks in a heterogeneous network architecture has been chosen as a viable solution to persistent issues in current implementations. However, these network designs lack several fundamental software and hardware pitfalls associated with problems in designing: associated cell optimizations, schemes on simultaneous base station associations and cooperation between tiers in the architecture. Therefore, this research will focus in fine tuning these software and hardware fallacies for the successful implementation of proposed 5G networks. A main software drawback in current networks is persistence of lazy caching themes. As shown in figure 1, currently user requests are often matched to arbitrary locations without the use of preenabled caching mechanisms. To overcome this issue proactive caching where base stations (BS) identify external clients possessing cached information and dynamic Device-to-Device (D2D) connection creation could be implemented. As shown in figure 2, significant improvements in successful requests could be achieved both under high load and under low load as users are efficiently matched to potential targets. A main drawback in mobile network hardware design is high energy consumption proportional to increasing user requests. To overcome this issue cell zooming could be introduced to 5G implementations. As shown in figure 3, the central cell could use an algorithmic approach to identify the network request density around it and zoom its range in or out to efficiently serve while neighboring cells could be switched off for a predetermined interval and vice versa. T-tests carried under this paradigm proved that significant cost savings in efficient use of energy in these cells could be achieved under this solution