Browsing by Author "Dias, N. G. J."

Now showing 1 - 3 of 3

Energy Efficient Simple and Anonymous Crypto currency Management with Crypto Identities
(Journal of Green Engineering, 2021) Gamage, H.T.M.; Weerasinghe, H. D.; Dias, N. G. J.
Since the introduction of bitcoin, thousands of cryptocurrencies have been developed and adopted all over the world. Nevertheless, we believe they still have a long way to go in order to replace regular currencies in day-to-day activities. A separate cryptocurrency wallet is required to hold coins and tokens of its type, which is also one of the complicated problems concerning managing multiple cryptocurrencies. Every wallet has at least one unique alphanumeric identifier address, usually twenty-six or more characters in length. Since the blockchain ledger is public, the user’s anonymity is protected using this address when transferring e-money. Communicating this address is also a difficult process. The current method to resolve the communicating complexity without compromising anonymity is to use a QR code, requiring a QR scanner app. Transacting with different coins with the same user requires communicating all of the different wallet addresses. With this research, we propose a solution to the multifaceted problems of executing peer-to-peer cryptocurrency transactions and managing varied cryptocurrencies, without compromising anonymity. We introduce secure and anonymous crypto identities with an open protocol to securely communicate identities over a communication medium, tied to any number of different cryptocurrencies.
Online Assessment Technologies and Future Trends: A Systematic Review
(Faculty of Computing and Technology, University of Kelaniya Sri Lanka., 2023) Nafrees, Abdul Cader Mohamed; Liyanage, S. R.; Dias, N. G. J.
A rapidly expanding method of continuing education in times of epidemic or conflict is online assessment (OA). Numerous tools are now available to perform OA more effectively and maintain the quality of e-learning (EL) as a result of the fast growth of new technologies. In order to analyse OA technologies and their future prospects, this study has conducted a systematic literature review (SLR). These publications were evaluated in light of the study issue, recent developments and future trends. It was shown that while few studies took into account automated feedback providing, the majority of studies concentrated on eradicating OA cheating. Few studies also concentrated on creating software for OA. Additionally, the bulk of studies have taken AI-based research into account. This research has downloaded articles only from 8 publishers and only open access articles. Future researches can be done about identifying techniques, how OA helps for the fair access to the quality education, and implications and considerations of implementing OA technologies.
Use of a ChatBot-Based Advising System for the Higher-Education System
(Faculty of Computing and Technology, University of Kelaniya Sri Lanka., 2023) Radhakrishnan, Hansi K; Dias, N. G. J.
The educational advising process most often consists of repeated queries related to institutional policies, academic progression, career pathways, and industry placements. In the higher education system, this procedure is usually initiated by various learners directing the same questions toward a limited number of advisors, which results in the advising process being reliant on the availability of the individuals and their hectic work schedules. Hence, this study introduces a feasible mechanism of a chatbot-based advising system to bridge this identified gap between learner requirements and resource availability by automating the prescriptive advising process beyond the traditionally available methods. Most existing systems provide a rule-based approach with limited pre-defined intent-response structures, resulting in several identified usability shortcomings. In response, this study utilizes an opensource Large Language Model (LLM) combined with a custom knowledge base to address critical aspects needed for a chatbot-based advising system, such as personalization, conversational memory, and ease of maintenance. The system is built around three major components: an admin panel for advisors, a conversational user interface (CUI) for learners, and an easy-to-maintain custom knowledge base. It uses the traditional form of information distributed to students through handbooks, guidelines, and course outlines to create a custom knowledge base which is then utilized to answer the user's queries through a semantic similarity algorithm. This work contributes (1) a prototype of a chatbot-based advising system for higher educational institutes in Sri Lanka, (2) the application of Large Language Models, vector databases, and semantic similarity in the design of the system, and (3) the results of evaluating the system's functionality and performance metrics through comprehensive test cases and a comparative analysis against the existing approaches. As identified, the proposed system showcased a response accuracy rate of 89% proving that this novel approach of a component-based architecture excels in performance when compared to similar approaches.