Browsing by Author "Gunasekara, HDA"

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item: Thesis-Full-text
Effect of lignin base antioxidant on natural rubber base solid tyre tread compound
Gunasekara, HDA; Nilmini, R; De Silva, k
The purpose of this research was to study the feasibility of lignin as an antioxidant for tire tread compounds. Lignin is naturally abundant and cost competitive wood derivatives possessing antioxidant properties and offering reactive functional groups on their surfaces. Further, lignin is a natural, non-hazardous and sufficiently bio degradable material. The present study deals with a natural rubber based tire tread compound containing different antioxidant combinations. Lignin as a bio polymer was combined with commercially available antioxidants (6PPD and SKF) to investigate from the view point of their thermo-oxidative aging. The research specifically focused on producing tire tread compound for industrial applications. Physico-mechanical properties such as tensile properties tear strength, hardness, abrasion and flexing, and cure characteristics, on tire tread compound was investigated before and after thermo-oxidative aging. The results obtained are shown that the lignin exerts a stabilizing effect. Moreover lignin blends with the selected antioxidants increased the stabilization effect. The conclusion extracted from this study demonstrates that the higher potential of using lignin as a natural antioxidant substitute for commercial tire tread compounds
item: Conference-Full-text
A Mobile Application with Augmented Reality to Enhance Sinhala Learning Experience for Children
Wickramasinghe, WAUYS; Gunasekara, HDA
Augmented Reality has gone from science fiction dream to possible emerging technology in the modern world. This futuristic technology has the ability to blend the real world with digital world. This paper presents an Augmented Reality based mobile solution for children to enhance their Sinhala alphabet learning experience. With this tool, children can interactively learn letters, pronunciation and usage of letters in real world scenarios. Generally, teaching preschool children could be difficult since they only focus on an activity for a short period of time. Therefore this solution mainly focuses on adding fun and entertainment while addressing cognitive skills of the children. This application adds totally new learning experience for its users. A survey done with pre-school children and teachers proved that using Augmented Reality based solution with latest technologies are very helpful for learning things and teaching things efficiently. Most students requested to use the Augmented Reality application repeatedly. Teachers showed high level of enthusiasm and over 85% of the respondents gave extremely positive feedback