ARS - 2014

Permanent URI for this collectionhttp://repository.kln.ac.lk/handle/123456789/172

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A comparative study on modern French and Sri Lankan political discourse
(Book of Abstracts, Annual Research Symposium 2014, 2014) Ekanayake, E.M.V.R.S.
Remarking its naissance on 1920s� discourse analysis has evolved today from its linguistic perspective to a variety of social sciences disciplines. Rather than being imprisoned to a mere textual analysis, discourse analysis reveals the socio-cultural and socio-psychological characteristics of the given communicative event i.e writing, conversation or speech. Modern scholars of critical discourse analysis (CDA) have disclosed that the language, culture and ideology are interrelated.
A comparison of errors in languages spoken by Sinhala- English bilinguals with Post-Stroke Aphasia
(Book of Abstracts, Annual Research Symposium 2015, 2014) Dharmarathna, N.I.; Bakmeewewa, D.A.
Bilinguals are defined as those who use two languages in daily communication. Aphasia as an acquired language disorder virtually affects all languages of the bilingual speaker, often in varying degrees. The Clinical picture of the bilingual aphasic is of great interest to researchers, as the bilingual population of the world continues to increase. As a multi- ethnic country, bilingualism continues to grow in Sri Lanka. The knowledge of multiple languages has led to the functional elaboration of all languages known especially in Sinhala-English bilinguals. Yet, there is a severe dearth on bilingual aphasic literature in the Sri Lankan Speech & Language Therapy context.
A flight information system for Android
(Book of Abstracts, Annual Research Symposium 2014, 2014) LDSK Nanayakkara; MC Wijegunasekara
Android applications are very famous among mobile phone users. Different types of service ad features providing applications are introduced day by day. One of the key reasons for the rapid growth of Android applications is its Open Source technology. Vast varieties of categories of Android applications are available in the Internet for users such as Games, Entertainment, Educational, Cookery, Health-care, Social-communication, Aviation and many more.
A framework for measuring readiness of e-assessment for sliate
(Book of Abstracts, Annual Research Symposium 2014, 2014) MVM Jayathilake; PHAB Shantha
Assessment is the central to education practice. It is essential to develop systems for assessment which reflect the core educational goals, and which reward students for developing skills and attributes which will be of long-term benefit to them and to society.
A linguistic study on excluding formal education in second language from grades one and two;
(Book of Abstracts, Annual Research Symposium 2014, 2014) KKR Wickramaratne
Start age for formal education in second language varies throughout the world. Presently, In Sri Lanka, formal education in second language commences at grade three in government schools. Accordingly, this study aims at finding out whether starting formal English education from the first grade in Sri Lankan schools will make students more proficient in second language when they come to grade three while having no negative impact on their skills in mother tongue.
A low cost electro-deposition procedure for growth of n- type cds semiconductor material used in fabrication of cds/cdte thin film solar cells
(Book of Abstracts, Annual Research Symposium 2014, 2014) Chaturangi, R.A.; Kumarasinghe, K.D.M.S.P.K.; Pathiratne, K.A.S.; de Silva, D.S.M.
CdS/CdTe thin film solar cells have exceeded the efficiencies of nearly 20% and 16% in laboratory and industrial scale devices respectively. Owing to the large band gap of 2.42 eV of CdS semiconductor, it is used as the window material in these devices. A low cost electro-deposition experimental procedure which utilizes electro-purified analytical grade chemicals and a method which does not produce wastes need to be discarded into the environment is described here. CdS thin films with thickness <100 nm was potentiostasticaly electro-deposited utilizing EG & G Princeton Applied Research Model 366 A bipotentiostat on fluorine doped tin oxide(FTO) conducting glasses which function as working electrodes in three electrode cells comprising of silver/silver chloride reference electrodes and graphite counter electrodes. Prior to use, conducting glasses were mechanically cleaned in a dust free environment. Electro-purified CdCl2 and Na2S2O3 were used as the Cd and S sources for depositing thin films of CdS on FTO glasses. Ranges of working electrode potentials, relative proportions of the two salts and the pH in the electroplating baths which could yield CdS thin films that showed satisfactory photovoltaic activities were estimated. Bath temperature and deposition time were kept at previously established values of 470C and 1 hour for all depositions. Also all CdS thin films were annealed at 400 0C for 10 minutes in air prior to estimation of their photovoltaic properties. It was found that, deposition potentials in the range of -1300 to �1500 mV with respect to silver/silver chloride electrode, concentration ratios of [Cd]/[S] = 10:1 to 15:1 having [Cd] concentrations in the range of 10 to 15 mmol dm-3 in solution and pH in the range of (1.2�1.4) in the plating bath could produce CdS thin films with optical band gaps lying in the range of (2.3 � 0.1) eV. X-ray diffraction studies showed that all CdS deposits were to consist of cubic lattice structure. Current- Voltage measurements indicated that, the thin films grown were of n-type in electrical conductivity. Photo-electrochemical cell experiments produced open circuit voltages and short circuit current densities in the ranges of -150 to -250 mV and 3.75 to 20 ?A cm-2 respectively indicating the level of photovoltaic activity that the deposits of CdS could demonstrate. Studies are in progress for further improvements of the electro-deposition procedure.
A new bioactive curvularin macrolide from an endolichenic fungus, Curvularia trifolii, isolated from Usnea sp., in Sri Lanka
(Book of Abstracts, Annual Research Symposium 2014, 2014) Samanthi, K.A.U.; Wickramaarachchi, S.; Wijeratne, E.M.; Paranagama, P.A.
The search for new bioactive natural products is still the main way of discovering new drug leads. Although fungi are well-known producers of secondary metabolites with new structurally diverse bioactive compounds, isolation of bioactive compounds from endolichenic fungi still remain underexplored as potential source of natural products. Endolichenic fungi are microorganisms living in the thalli of lichens that are analogous to the plant endophytic fungi inhabiting the intercellular spaces of the host. Curvularia trifolii was isolated from the lichen, Usnea sp., available in Hakgala botanical garden, Sri Lanka. Identification of the fungus was confirmed using morphological characters followed by the molecular identification (DNA sequencing). Invitro large scale cultures of C.trifolii were prepared in 60 large Petri dishes containing potato dextrose agar medium and after 10 days secondary metabolites were extracted into ethyl acetate. The crude extract was tested using two types of bio assays, for the investigation of antioxidant and anti-inflammatory activities. Antioxidant activity of the crude ethyl acetate extract was explored by carrying out DPPH free radical scavenging assay and Anti-inflammatory activity was evaluated using Human Red Blood Cell Membrane Stability (HRBC) assay. Since the crude extract showed high activity in both the assays, it was partitioned into hexane, chloroform (CHCl3) and 60% aq.MeOH and identified the bioactive fractions. The activity of CHCl3 fraction was confirmed and it was further fractionated using bioassay guided column chromatography (silica, sephadex) and preparative TLC to isolate pure compounds. One florescent active pure bioactive compound (C23H30O6) was isolated from the CHCl3 fraction and identified as using 1D, 2D NMR, MS, IR and UV spectral data. The structure of new compound was thus established as 5-methoxy-4,8,15-trimethyl-3,7-dioxo-1,3,7,8,9,10,11,12,13,14,15,15?-dodecahydrocyclododeca[de]isochromene-15-carboxylic acid and the bioassay results revealed that it is a new curvularin macrolide with IC50 values, 68.6�4.3 ?g/mL and 310�48.2 ?g/mL for DPPH antioxidant assay and anti-inflammatory assay respectively. Hence it is revealed that derivative isolated from C. trifolii can be developed as an important antioxidant and anti-inflammatory drug.
A sales management system using cloud computing technology
(Book of Abstracts, Annual Research Symposium 2014, 2014) Wijethunga, I.A.; Dias, N.G.J.
At present, cloud computing technology is used in many applications because of the rapid development in network technology and the cost of transmitting a terabyte of data over long distance has extremely reduced in the past decade. Cloud computing is a technique based on distributed computing resources in pay per usage strategy. A user can access cloud services as a utility service and able to use them almost instantly. These features make cloud computing so flexible with the fact that services are accessible anywhere at any time.
A software prototype for optical recognition of sinhala embossed braille
(Book of Abstracts, Annual Research Symposium 2014, 2014) NMT De Silva; SR Liyanage
The Braille system is a tactile format of written communication for sight-impaired people over theworld. It consists of cells of raised dots arranged in a grid. The presence or absence of raised dots canbe sensed by the blind people�s fingertips to give them the coding for the symbol.
A study on developing Muthurajawela marsh in sustainable tourism
(Book of Abstracts, Annual Research Symposium 2014, 2014) Indrachapa Gunasekara
Muthurajawela marsh is a significant natural site which located near to a finest coastal area in Western Province of Sri Lanka. The area of Muthurajawela has a remarkable historical background which drawn through the period of Kotte Kingdom and Colonial era. This marsh land was instigated during the Colonial period due to the irrigation development. Nowadays it has become a significant site to experience nature. At present, Muthurajawela became an ecosystem which hosts diverse flora and fauna collection. It is a feeding ground for fishes, sanctuary for mangroves, shelters for variety of fauna such as mammals, reptiles and birds. Due to these diverse and attractive natural features in this site; there is a potential to promote it as a nature tourist attraction which located close proximity to Colombo the merchant city.
A study on selected biometrics and central obesity indices among
(Book of Abstracts, Annual Research Symposium 2014, 2014) Manuha, M.I.; Nageeb, B.M.; Iqbal, N.Z.; Paranagama, P.A.
The study was to analyze the relationship between body mass index (BMI) of overweight/obesity adult women with central obesity indices such as waist circumference (WC), Hip circumference (HC), waist-to-hip ratio (WHR) with lipid profile such as total cholesterol (TC), high-density lipoprotein (HDL), triglyceride (TG) and low-density lipoprotein (LDL). Percentage of overall abnormal lipid levels and low haemoglobin level in overweight and obese were also analyzed. Female adults with overweight (BMI between 25 -30 Kg/m2 or obese (BMI over 30 Kg/m2) and the ages ranged between 18- 60 years were included in this study. The subject studied constituted a convenience sample of 121 representing different socio-economic status. Measurements; Body weight, height, waist and hip circumferences, blood pressure, pulse, lipid profile with TC, HDL, TG, LDL and Hb percentage were investigated. The results showed that 63.6% with high LDL-C, 59.1 % with high TC, 18.2 % with high TG and 43.2% with low HDL-C. Haemoglobin levels of the participants were 47.9% and it is below the range of cut off value given by WHO. Correlation between BMI and WC, HC, WHR was analyzed separately. According to the results obtained BMI showed a strong positive correlation with WC and HC, n (121) =0.8, p < 0.01 and n(121) = 0.838, p < 0.01 respectively. Analysis of correlation between WC with HC and WHR indicated strong positive correlation, n (121) =0.809, p < 0.01 and n (121) = 0.442 respectively. TC and LDL were strongly positively correlated, n (121) =0.895 p < 0.01, but the HDL was inversely associated with TG and LDL P = -0.072, P = -0.184 respectively. TG was inversely associated with LDL-C (P= - 0.072).Concurrently, the abnormally highest mean of WC 105.4 � 11.7cm and the highest mean of waist to hip ratio 0.97 �0.05 also found. In the present study the results revealed that more than half of overweight and obese adult women had abnormal lipid levels and nearly half of overweight and obese adult women had low hemoglobin concentration. The present study revealed a higher percentage of body fat across a range of waist circumference values. The mean waist circumference, hip circumference and waist to hip ratio were significantly higher than the cut off points reported by WHO (2008).
A study on the impact of the collection development of printed resources in public libraries for a pluralistic society
(Book of Abstracts, Annual Research Symposium 2014, 2014) S Senavirathna
The library is a live educational, cultural and communication media while it is also a common institute that promotes the mutual understanding, peace and cooperation.
Accessory muscle in the flexor compartment of the forearm: A case report
(Book of Abstracts, Annual Research Symposium 2019, 2014) Hasan, R.; Fernando, E.D.P.S.; Salvin, K.A.; Dilshani, W.M.S.; Niwunhella, N.A.D.P.; Perera, A.A.M.M.S.L.; Wijesundara, W.M.R.D.
A wide array of supernumerary and accessory musculature has been described in anatomical, surgical and radiological literature. Awareness of potential muscular variations is essential for anatomists, surgeons and clinicians in numerous areas of medical field.
Appropriateness of the classical black-scholes method in option price calculation
(Book of Abstracts, Annual Research Symposium 2014, 2014) P.P.D.N.Kaushalya; N.G.A.Karunathilake
Financial mathematics provides tools for the constructions in financial modeling. Various Financial Mathematical models have been developed for the description of financial derivatives for past few decades. An option is a contract that gives the purchaser the right to buy or sell a specified financial product of an underlying asset at a fixed price on a specified future date. There is no obligation to exercise the option. Two main types of options, namely, American and European options are widely used in today�s world. European option may be exercised only at the expiration date of the option while the American option may be exercised at any time before the expiration date.
Attractive effect of volatile extracts of tea stems, Camellia sinensis L.O.Kuntze on Glyptotermes dilatatus Bugnion and Popoff
(Book of Abstracts, Annual Research Symposium 2014, 2014) PA Paranagama; PD Senanayake; Keerthi Mohotti
Low country live wood termite (LCLWT), Glyptotermes dilatatus Bugnion and Popoff is one of the major insect pests of low grown tea. They first colonize in rotted stumps which are formed due to the invasion of wood rot fungi through pruned stems of tea plant, Camellia sinensis L.O.Kuntze and continue their feeding to healthy wood. LCLWT damage is significant owing to its economic crop loss and spread in almost all low grown tea areas. However, concealed habit of the pest limits pest management methods leaving no efficient methods to control this pest at present.
Causal relationship between construction activities & gdp growth in
(Book of Abstracts, Annual Research Symposium 2014, 2014) Ruchika Athukorala; TMJA Cooray
The construction industry plays a vital role in the socio economic development and national fiscals in any country. Usually it provides a considerable share towards the Gross Domestic Product (GDP) and Gross National Product (GNP) of the economy. Further it helps to bring lot of development goals for any country such as providing infrastructure, technology, machinery, engineering services and employment opportunities.
Chromium accumulation in Cr (VI) resistant bacteria
(Book of Abstracts, Annual Research Symposium 2014, 2014) Abewickrama, J.H.G.; Jayarathne, D.L.; Rathnayake, I.V.N.; Gunawardane, M.M.
Accumulation of Cr(VI) is one of the methods used in bacteria to overcome elevated chromium concentrations. These hyperaccumulators of Cr(VI) are important in bioremediation of Cr (VI) containing wastes. Accumulation of Cr(VI) has been previously reported in Alcaligenes eutrophus CH34, Bacillus subtilis and some Pseudomonas sp. During this study Chromium accumulation of a Cr (VI) resistant Psuedomonas sp., Escherichia coli JM109 and the transformant E.coli JM109 with plasmids extracted from the Cr(VI) resistant Pseudomonas sp. were compared. Cr (VI) accumulation was estimated at 0, 5, 10, 15 mg/L Cr (VI) concentrations after 72 hour exposure time. The cells were subjected to acid lysis and the chromium concentrations were estimated using Atomic Absorption Spectrometry. Cr (VI) accumulation percentages of Cr (VI) resistant Pseudomonas sp. under 5, 10, 15 mg/L Cr (VI) concentrations were 51.38%, 37.46% and 43.13% respectively. Those percentages were 2.6%, 1.54%, and 1.12% for E.coli JM109 while they were 35.58%, 20.06% and 34.03% for the transformant. There is a possibility of chromium accumulation being regulated by Cr (VI) resistant genetic determinants found on plasmids. In addition, the nature of the host that bears the plasmid is also important for the Cr (VI) accumulation mechanism.These hyperaccumulators of Cr (VI) showed potential use in bioremediation of Cr(VI) containing wastes.
Climatic factors affecting density of Anopheles vector mosquitoes in Ampara District, Sri Lanka
(University of Kelaniya, 2014) Kannangara, D.N.; Ranathunge, R.M.T.B.; Abeyewickreme, W.; Hapugoda, M.D.; Subasinghe, S.M.C.U.P.
Background: Apart of many vector-borne diseases malaria played a major role during past decades in Sri Lanka. Controlling strategies had effectively addressed this issue so that there were no malaria patients recently. However it has been observed that abundance of vector mosquitoes in districts like Ampara is high, which signifies a potential of spreading of malaria in the area in future. Identification of the relationship between the climatic factors and vector density could be a cost effective way in controlling the mosquito instead of costly strategies currently followed. This study attempts to identify the relationship exists between climatic factors and the vector density in Ampara District.
Colloquial Sinhala language as a mixed discourse variety; a study on the syntactic and semantic impact of English language on present day colloquial Sinhala language
(Book of Abstracts, Annual Research Symposium 2014, 2014) KGS Gamage; SARRP Dissanayake
This study focuses on the mixing context involving in two languages, Sinhala and English. The mixing context between these two languages in Sri Lanka has brought about considerable changes in present day colloquial Sinhala language, which has resulted in creating a mixed discourse variety.
Conducting viva voce examinations during preclinical years in the faculty of medicine, University of Kelaniya: Is it of relevance?
(Book of Abstracts, Annual Research Symposium 2018, 2014) Hasan, R.; Perera, A.A.M.M.S.L.; Wijesundara W M R D; Dilshani, W.M.S.; Niwunhella, N.A.D.P.; Salvin, K.A.; Fernando, E.D.P.S.
Viva voce (vivas) or oral examinations are an integral part of medical education. During a viva the examiner is given the opportunity to assess the candidate�s knowledge and ability to respond under pressure. For medical students vivas are an opportunity to develop verbal and presentation skills. Vivas were part of the preclinical examinations held in the Faculty of medicine Ragama prior to the introduction of the new curriculum. This research was carried out in order to identify the opinion of lecturers on reintroduction of vivas for preclinical examinations.