http://ir.lib.seu.ac.lk/handle/123456789/7296 2024 2026-03-30T09:08:33Z http://ir.lib.seu.ac.lk/handle/123456789/7345 Title: Evaluating the effectiveness of homomorphic encryption in big data: a descriptive and diagnostic analysis Authors: Jayaweera, W. C. K.; Fathima Shafana, A. R. Abstract: The ever-increasing volume of data generated from various sources, including the Internet of Things (IoT) and digital channels, presents a significant challenge for organizations. This rapid growth often necessitates offloading data analysis to the cloud due to limitations on local server capacity. However, security concerns arise when analyzing sensitive data in the cloud environment. Traditional encryption methods, while effective in protecting data at rest, require decryption prior to analysis, potentially exposing sensitive information. On the other hand, Homomorphic Encryption (HE) is gaining popularity as it – offers a solution by enabling computations to be performed directly on encrypted data. This paper investigates the effectiveness of homomorphic encryption on big data through descriptive and diagnostic analyses. Result suggest that this approach is better in terms of execution time and is particularly well-suited for big data analytics due to its inherent scalability. 2024-10-16T00:00:00Z http://ir.lib.seu.ac.lk/handle/123456789/7344 Title: The study of gestalt and cognitive psychological theory influences the creation of user interfaces and user experiences Authors: Bandara, L. A. R. P. M. S.; Kalith, M. Abstract: In the rapidly advancing realm of digital technology, the imperative of creating innovative and user-centric interfaces cannot be overstated. This research undertakes a comprehensive exploration of Human-Computer Interaction (HCI), with a specific focus on harnessing the insights derived from gestalt and cognitive psychological theories to redefine the art of user interface (UI) design and elevate user experiences to new heights. One of the pressing challenges in contemporary digital design lies in the unsettling uniformity that characterizes many UIs. The research methodology comprises four distinct phases. The initial phase involves the meticulous crafting of an ideal UI prototype for an e commerce platform. The second phase entails an exhaustive review and synthesis of UI design theories grounded in Gestalt and Cognitive psychology. The third phase is marked by the assimilation of these theories into the UI design process. Finally, the fourth phase involves the integration of user feedback, a critical step in validating and comparing the ideal UI prototype against the newly developed UIs infused with psychological principles. In conclusion, this research underscores the vital importance of transcending the ordinary in UI design. By harnessing the potential of Gestalt and Cognitive psychological theories, we aspire to dismantle the shackles of design uniformity, providing users with interfaces that are not just personalized but also harmonized with the intricacies of human cognition. In this pursuit, we anticipate a paradigm shift in HCI, where engagement and user-centricity reign ultimately elevating user satisfaction, productivity, and the overall quality of the digital experience. 2024-10-16T00:00:00Z http://ir.lib.seu.ac.lk/handle/123456789/7343 Title: Design and fabrication of a solar-powered electric bike Authors: Ranasinghe, R. A. T. D.; Wijayarama, V. J. S.; Sahib, S. M.; Kumara, W. G. C. W.; Muzathik, A. M. Abstract: Electric bikes have experienced significant growth due to several factors, including price reductions and increased climate and environmental awareness. This trend presents a promising solution for replacing fossil fuels, with batteries emerging as a new power source. However, limitations such as limited mileage, extended charging times, and the scarcity of charging stations persist. Renewable solar energy also significantly reduces the carbon footprint of urban transportation. The research objective is to enhance the driving range of electric vehicles using solar power. This project aims to design a market-ready solar-powered electric bike using flexible solar panels and a foldable, adjustable solar panel mount for on-the-go charging. This design enables the bike to charge for free when parked in the sun, reducing dependence on traditional charging stations, waiting time reduction and lowering operational costs. Calculations, analyses, and various tests are conducted based on technical specifications, energy consumption requirements, and vehicle movement using the proposed method. 2024-10-16T00:00:00Z http://ir.lib.seu.ac.lk/handle/123456789/7342 Title: Determination of quality characteristics of ‘Nimba Arishta’: a comparative analysis of Sri Lankan brands Authors: Dishani Thakshila, P. W. Abstract: Ayurveda is an ancient system of medicine that has been used for thousands of years. It comprises a variety of medicines, including fermented forms such as Arishta (fermented decoctions). The therapeutic use of Arishta is determined by the properties of its ingredients and the method of preparation. Because of the differences in the ingredients used and the manufacturing process applied by different manufacturers, the physicochemical characteristics are susceptible to various changes. In the present study, different brands of Nimba Arishta, mainly made from Azadirachta indica (A, B, C, D, E and F) available in the market were thoroughly evaluated for their physicochemical parameters to establish an accepted procedure for standardisation of these Ayurvedic formulations. The physicochemical parameters such as pH, brix, refractive index, specific gravity, total dissolved solids, total ash content, acid insoluble ash and water soluble ash contents were evaluated. The results of the study were found within these ranges; pH 3.01(D) - 3.64(A), refractive index 1.3725 (A) - 1.4019(C), specific gravity 1.0684(A)- 1.0864(F), brix 25.06(A) - 41.00(C), total dissolved solids (g/mL) 0.1993(A) - 0.4107(C), total ash content (w/w%) 0.0971(D) – 0.1070(A), water soluble ash content (w/w%)( 0.004(B) - 0.0899(F), acid insoluble ash content (w/w%) 0.0131(D) - F-0.0571(F). The results showed that the formulation of different brands of Nimba Arishta varies, highlighting the need for standardisation of Arishta. 2024-10-16T00:00:00Z