Browsing by Author "Wijayasinghe, A."

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Depiction of Mental Disorders in Human Behavior Through Cinema: Related to Ashoka Handagama’s Cinematic Approach
(Faculty of Graduate Studies, University of Kelaniya, Sri Lanka, 2016) Wijayasinghe, A.; Rajapaksha, A.
According to the Critics, cinema can be considered as the most powerful medium of art which can be used to deliver powerful messages towards the human society. In that aspect, the director of the film has a major responsibility in creating and delivering such messages to the audience through using creative elements of cinema. Most number of directors tries to reveal the unseen reality of human life through the cinema. Ashoka Handagama can be considered as a director who always tries to reveal the bitter truth of human nature through his cinematic approach. Most number of cinema creations done by Handagama created a controversial atmosphere in the Sri Lankan society. Some of his cinema creations were banned due to that reason. But Handagama tried to reveal some human mental disorders which prevailed in the Sri Lankan society where the public do not like to accept it. This research mainly focused on how Handagama tried to depict mental disorders of human nature through his cinematic approach. Content analysis and in-depth Interviews were used as the research methods to collect data regarding this. According to the data which was collected from the above methods, clearly suggest that number of mental disorders in human behavior had depicted through Ashoka Handagama’s cinematic approach. At the same time, these disorders have rally prevailed in the society where public do not like to accept that reality. In this context, Handagama’s cinema becomes controversial which paved the way for banning his films.
Structural analysis of LiNi1/3Mn1/3Co1/3O2, Li0.96 Na0.04Ni1/3Mn1/3Co1/3O2 and Li0.96K0.04Ni1/3Mn1/3Co1/3O2 materials synthesized by Pechini method
(Faculty of Graduate Studies, University of Kelaniya Sri Lanka, 2022) Fernando, W. T. R. S.; Amaraweera, T. H. N. G.; Wijayasinghe, A.
Layered tri-transition metal oxides, specially LiNi1/3Co1/3Mn1/3O2 (NMC 333), have become a promising alternative to LiCoO2 electrode material in the rechargeable Lithium-Ion Battery (LIB). The electrochemical performances of NMC 333 mainly depend on its crystallographic structural properties including lattice parameters, the unit-cell, c/a ratio, volume, crystallite size (D), dislocation density(δ), and lattice strain. This study aims to synthesize LiNi1/3Mn1/3Co1/3O2, Li0.96Na0.04Ni1/3Mn1/3Co1/3O2, and Li0.96K0.04Ni1/3Mn1/3Co1/3O2 materials and study their structural properties. The Pechini method was used for powder synthesis in this study. The synthesized materials were characterized using X-ray diffraction (XRD). X-ray characterization confirmed the formation of only the single-phase layered hexagonal lattice (α-NaFeO2-type) structure without any impurity phase for all these prepared materials. Interestingly, while confirming the formation of layered structures, a better splitting of the (006)/(102) and (108)/(110) peaks appeared for Li0.96K0.04Ni1/3Mn1/3Co1/3O2 than that of LiNi1/3Mn1/3Co1/3O2 and Li0.96Na0.04Ni1/3Mn1/3Co1/3O2 in the diffractograms. The lattice parameters, i.e. a, c, c/a, the unit-cell volume, the crystallite size (D), and dislocation density(δ) are 2.8641(Å)̇, 14.2143(Å)̇, 4.9629, 100.979(Å3)̇, 77.45 nm,1.666×1014 m−2, for LiNi1/3Mn1/3Co1/3O2. While they are 2.8675(Å)̇, 14.2317(Å), 4.9630, 101.347(Å3)̇, 85.06 nm, 1.382×1014 m−2 for Li0.96Na0.04Ni1/3Mn1/3Co1/3O2 and 2.869 (Å)̇, 14.2421(Å)̇, 4.9641, 101.528(Å3)̇, 128.38 nm, 0.606×1014 m−2 for Li0.96K0.04Ni1/3Mn1/3Co1/3O2, respectively. It is also observed that the lattice parameters, the unit-cell volume, c/a, and the crystallite size are increased with the substitution of Li+ by Na+ and K+. It may be due to the radii of Na+ and K+ are bigger than that of Li+ and that will pave the way for increasing the interlayer space of the substituted materials with the substitution of bigger ions. The c/a ratio constitutes a direct indication of the cation mixing. Li0.96Na0.04Ni1/3Mn1/3Co1/3O2 and Li0.96K0.04Ni1/3Mn1/3Co1/3O2 exhibit higher c/a values than LiNi1/3Mn1/3Co1/3O2, supporting the observation that the substituting bigger ions such as Na+ and K+ into LiNi1/3Mn1/3Co1/3O2 suppresses the cation mixing and forms a well-defined layered structure. The micro-strain calculated for the LiNi1/3Mn1/3Co1/3O2, Li0.96Na0.04Ni1/3Mn1/3Co1/3O2, and Li0.96K0.04Ni1/3Mn1/3Co1/3O2 are 1.38×10−3, 2.17×10−3 and 1.46×10−3, respectively. This implies a slight difference in the crystallinity of the materials, as the micro-strain was slightly affected by substituting Na+ and K+. Crystallite size (D) was 77.45 nm, 85.06 nm, and 128.38 nm for LiNi1/3Mn1/3Co1/3O2, Li0.96Na0.04Ni1/3Mn1/3Co1/3O2 and Li0.96K0.04Ni1/3Mn1/3Co1/3O2, respectively. It exhibits an increment of crystallite size, indicating a lowering of the dislocation density with the substitution of bigger ions. Altogether, this study reveals that substituting Li+ with bigger ions of Na+ and K+ is improving the structural stability of NMC 333.
The Way of Buddhist Monk's Image has used by the Political Movements of Sri Lanka after the Independence
(Faculty of Graduate Studies, University of Kelaniya, Sri Lanka, 2016) Wijayasinghe, A.
The relationship between the state of Sri Lanka and the Buddhism was established on the day when the Arahath Mahinda Thero introduced Buddhism to Sri Lankan society. After that Buddhist monk became a prominent figure in Sri Lankan society. This situation prevailed from the Anuradhapura kingdom to Kandyan kingdom. When Sri Lanka became a colony of British, Buddhist monk had given his guidance for the rebels conducted by local people. The Vidyalankara Decleration (Vidyalankara Prakashaya) which was declared in 1946 gave a disciplinary permission for Buddhist monks which encouraged them to engage in political activities without any fear. That situation paved the way to Buddhist monk for emerge as a prominent figure in 2004 parliamentary election as election candidates and won nine seats in parliament. This study is mainly focused on the way of Buddhist monk's image has used by the political movements of Sri Lanka during the time frame of 1947 to 2015. The collection of data for this study was mainly done through the methods of textual analysis and interviews. The data which was collected according to the above methods clearly suggest that the Buddhist monk had captured a prominent place in Sri Lankan history of politics. As well as the image of Buddhist monk had used by the various types of political movements in various aspects in order to grab the public opinion towards their victory.