DSpace Collection:http://repository.kln.ac.lk/handle/123456789/139002024-03-29T06:45:49Z2024-03-29T06:45:49ZInvestigation of anisotropy constants dependence of ultra-thin ferromagnetic films with second order perturbed Heisenberg HamiltonianSamarasekara, P.http://repository.kln.ac.lk/handle/123456789/99532023-04-24T12:14:09Z2007-01-01T00:00:00ZTitle: Investigation of anisotropy constants dependence of ultra-thin ferromagnetic films with second order perturbed Heisenberg Hamiltonian
Authors: Samarasekara, P.
Abstract: The variation of energy of ferromagnetic ultra-thin films with second and fourth
order anisotropy was investigated using Heisenberg Hamiltonian with second order
perturbation. The study was limited to sc(001) film with three layers. Graphs indicate
energy minimums at certain values of second order anisotropy, fourth order anisotropy
and angle. Films with fourth order anisotropy
ω
)4( Dm =4 can be easily oriented in the
direction given by angle of 2.66 radians for the values of other energy terms used in
this simulation. When the second order anisotropy (
ω
)2( Dm ) is 3.1, preferred direction
is 0.754 radians. When the second order anisotropy varies at a constant value of fourth
order anisotropy, the graph indicates more energy minimums.2007-01-01T00:00:00ZStudies on antioxidant activity of Indian gooseberry fruit and seedNadheesha, M.K.F.Bamunuarachchi, A.Edirisinghe, E.M.R.K.B.M.Weerasinghe, W.M.S.K.http://repository.kln.ac.lk/handle/123456789/99522023-04-26T07:25:56Z2007-01-01T00:00:00ZTitle: Studies on antioxidant activity of Indian gooseberry fruit and seed
Authors: Nadheesha, M.K.F.; Bamunuarachchi, A.; Edirisinghe, E.M.R.K.B.M.; Weerasinghe, W.M.S.K.
Abstract: Fruits and seeds of Indian Gooseberry (Phylanthus emblica, S. Nelli) were
investigated to evaluate their antioxidant activity. Antioxidant activity was evaluated
by the estimation of peroxide values (PV) of shark liver oil, treated with fruit and seed
extracts incubated at 600
C for a period of nine days. Seed extracts showed higher
antioxidant activity than fruit extracts. The ethanol and ethyl acetate extracts of the
fruit and all extracts of the seed were found to have higher antioxidant activity than the
synthetic antioxidant butylated hydroxy toluene (BHT).2007-01-01T00:00:00ZNew Interpretation Of Primitive Pythagorean Triples And A Conjecture Related To Fermat’s Last TheoremPiyadasa, R.A.D.Munasinghe, J.Mallawa Arachchi, D.K.Kumara, K.H.http://repository.kln.ac.lk/handle/123456789/54382023-04-26T10:43:37Z2007-01-01T00:00:00ZTitle: New Interpretation Of Primitive Pythagorean Triples And A Conjecture Related To Fermat’s Last Theorem
Authors: Piyadasa, R.A.D.; Munasinghe, J.; Mallawa Arachchi, D.K.; Kumara, K.H.
Abstract: In this study primitive Pythagorean triples have been carefully examined and found that all of them satisfy a simple rule related to mean value theorem. It is pointed out that integral triples satisfying the equation on Fermat’s Last Theorem should satisfy a special rule related to mean value theorem. A conjecture is proposed which may lead to find a simple proof of Fermat’s Last Theorem.2007-01-01T00:00:00ZPractical Issues in the Development of TTS and SR For The Sinhala LanguageWickramasinghe, R.I.P.Kumara, K. H.Dias, N.G.J.http://repository.kln.ac.lk/handle/123456789/54372023-04-26T10:43:56Z2007-01-01T00:00:00ZTitle: Practical Issues in the Development of TTS and SR For The Sinhala Language
Authors: Wickramasinghe, R.I.P.; Kumara, K. H.; Dias, N.G.J.
Abstract: In this study, discussed some issues that are arising in the development of Text-to-Speech (TTS) and Speech Recognition (SR) systems for the Sinhala language are discussed. There are numerous benefits of TTS and SR to Sinhala community. In the context of Sinhala language, the Natural Language Processing (NLP) technologies are in the primary stage in comparison with other languages such as English, French, German, Japanese etc. Since current TTS and SR development environments are far from being language independent, the existing systems cannot be adopted directly to the Sinhala language. This contribution outlines problematic areas that come across in the development of TTS and SR systems for Sinhala language. While discussing those problems, some of the possible solution strategies for both TTS and SR development have been formulated.2007-01-01T00:00:00Z