Wayamba University of Sri Lanka is the thirteenth national university in Sri Lanka. It was established in January 1999. The main purpose of the university is offering English-medium degree, diploma and certificate courses in areas such as Agriculture, Applied Science, Management for students and working professionals. The courses are highly up-to-date and job-oriented.The Wayamba University of Sri Lanka is headquartered at Kuliyapitiya, Sri Lanka. Its four faculties are in Makandura and Kuliyapitiya. The Faculty of Applied science and Faculty of Business Studies and Finance are established at Kuliyapitiya; the Faculty of Agriculture and Plantation Management and Faculty of Livestock, Fisheries, and Nutrition are in Makandura. Wikipedia.
Jayasinghe J.W.,University of Peradeniya |
Jayasinghe J.W.,Wayamba University of Sri Lanka |
Uduwawala D.N.,University of Peradeniya
2013 IEEE 8th International Conference on Industrial and Information Systems, ICIIS 2013 - Conference Proceedings | Year: 2013
Miniature antennas with multi frequency and broadband features have a high demand in the field of wireless communications. This paper proposes such a patch antenna for WLAN applications in UNII-1, UNII-2, UNII-2 extended and UNII-3 bands. The specialty of the antenna is its compact size with a foot print of only 8 mm × 4 mm. The patch with a shorting pin is etched on a substrate with a dielectric constant of 3.2 and a thickness of 0.762 mm and is suspended in air 5 mm above a ground plane. The patch geometry, feed point and shorting pin positions are optimized using genetic algorithms. The designed antenna displays a -10 dB fractional impedance bandwidth of 12.6% and is suitable for handheld devices. © 2013 IEEE.
Tharinda Nishantha Vidanagama V.G.,Wayamba University of Sri Lanka
2016 IEEE International Conference on Information and Automation for Sustainability: Interoperable Sustainable Smart Systems for Next Generation, ICIAfS 2016 | Year: 2017
Advances in technology have enabled wireless devices to monitor and provide information than ever before. These sensors/actuators can be incorporated into any device to provide the user an immersive experience which include services such as connected-consumer, e-Health and smart transportation etc. Bluetooth Smart has emerged as popular wireless communication technology for such devices. The Received Signal Strength Indicator (RSSI) has been used as an indicator to manage connections between Bluetooth smart devices. However the instability of real world radio signals causes variations in the RSSI value. This paper investigates the severity of this phenomenon in the European Telecommunications Standards Institute (ETSI) Machine-To-Machine (M2M) device and gateway domain. © 2016 IEEE.
Dharmadasa R.M.,Industrial Technology Institute |
Akalanka G.C.,Industrial Technology Institute |
Muthukumarana P.R.M.,Industrial Technology Institute |
Wijesekara R.G.S.,Wayamba University of Sri Lanka
Journal of Ethnopharmacology | Year: 2016
Ethnopharmacological relevance Sri Lanka has a great diversity of snake species. In this relation, over 40,000 cases of snakebite accidents are reported annually from different agro-ecological regions of the country. Since more than 95% of victims rely on traditional treatments, there is an urgent necessity to improve the system. Traditional knowledge on snakebite treatments has been passed on from generation to generation within families. Unfortunately, there has been a limited update of information on pertinent issues related to this subject. In the present study we conducted a comprehensive survey on the types of medicinal plant materials, including the specific plant parts that are available for this purpose. In addition, various treatment types, frequency index, heavily used and rare materials, family wise distribution, challenges faced by traditional practitioners and future prospects were also explored. Materials and methods The present survey covered two provinces with a high population of traditional practitioners for snakebites treatment in Sri Lanka.Information was gathered from a total of seventy-four (74) traditional practitioners from the Sabaragamuwa and Western provinces. A questionnaire was prepared and pre-tested by 10-15 respondents prior to the survey. Actual data were gathered through face-to-face interviews. Collected data were tabulated and analyzed. Results A total of 341 different plant species belonging to 99 families were documented. The highest number of plants was reported from the family Fabaceae (32 species). This was followed by Malvaceae (16 species), Asteraceae (15 species), Rutaceae (13 species Apocyanaceae (14 species), Lamiaceae (11 species), Poaceae, Euphorbaceae and Phyllanthaceae (10 species per each) respectively. Different parts of the plant such as leaves (53.67%), barks (26.10%), entire plant (14.08%), roots (10.26%), bulbs (8.80%), seeds (7.62%), fruits (6.45%), buds (5.87%), flowers (3.23%) stems (2.93%) and latex (2.05%) were used for the preparation of nine different types of formulae. These formulae include oral administration (172 plant species), external bandaging (167 plant species), oiling for external application (34 plant species), steaming (33 plant species), creaming for wounds (6 plant species), nasal treatments (40 plant species), head treatments (23 plant species), treatment for eyes (4 plant species) and washing of wounds (9 plant species). Moreover, plants used for the different snake types, constraints faced by traditional practitioners, and their constructive suggestions were also discussed. Conclusion A pioneering attempt was made to exploit local knowledge on snakebite treatments for the conservation of valued medicinal plants and to promote primary health care needs in Sabaragamuwa and Western provinces in Sri Lanka. The documented plants together with the traditional knowledge could be effectively utilized for the isolation and characterization of antivenom for different snake species. © 2015 Elsevier Ireland Ltd. All rights reserved.
Fernando I.D.N.S.,Wayamba University of Sri Lanka |
Abeysinghe D.C.,Wayamba University of Sri Lanka |
Dharmadasa R.M.,Industrial Technology Institute
Industrial Crops and Products | Year: 2013
Withania somnifera (L.) Dunal. (Solanaceae) is a therapeutically important medicinal herb used in Ayurvedic and traditional systems of medicine for the treatment of an array of ailments. Diverse therapeutic properties reported from W. somnifera are mainly due to the high content of polyphenols and antioxidant activities present in different parts of the plant. Present study investigates the total phenolic content (TPC) and total antioxidant capacity (TAC) of different parts of three different growth stages of W. somnifera grown under three different spacing levels. The TAC and TPC were determined using Ferric Reducing Antioxidant Power assay and modified Folin-Ciocalteu colorimetric method respectively. Leaf extract exhibited significantly higher (p<. 0.05) TAC and TPC values for all three different growth stages. However, the highest TAC and TPC of leaf extract for all three spacing levels were observed just after flowering stage. The highest total phenolic content was exhibited in leaf extracts followed by flower, fruits, stem and roots respectively. With regard to the anti oxidant content, the highest amount was recorded from leaf followed by pods, flowers, stem and roots respectively. Presence of higher TPC and TAC just after flowering stage scientifically validates traditional claims of harvesting of W. somnifera after flowering stage. The higher content of TPC and TAC in leaf demonstrated the possibility of incorporation leaf for the development of newer, effective drugs instead of roots. © 2013 Elsevier B.V.
Ganganath N.,Wayamba University of Sri Lanka |
Cheng C.-T.,Hong Kong Polytechnic University
Proceedings - 2013 International Conference on Cyber-Enabled Distributed Computing and Knowledge Discovery, CyberC 2013 | Year: 2013
Wireless sensor networks are usually deployed in scenarios that are too hostile for human personnel to perform maintenance tasks. Wireless sensor nodes usually exchange information in a multi-hop manner. Connectivity is crucial to the performance of a wireless sensor network. In case a network is partitioned due to node failures, it is possible to re-connect the fragments by setting up bridges using mobile platforms. Given the landscape of a terrain, the mobile platforms should be able reach the target position using a desirable path. In this paper, an off-line robot path planner is proposed to find desirable paths between arbitrary points in a given terrain. The proposed path planner is based on ACO algorithms. Unlike ordinary ACO algorithms, the proposed path planner provides its artificial ants with extra flexibility in making routing decisions. Simulation results show that such enhancement can greatly improve the qualities of the paths obtained. Performances of the proposed path planner can be further optimized by fine-tuning its parameters. © 2013 IEEE.
Shahidi F.,Memorial University of Newfoundland |
Chandrasekara A.,Wayamba University of Sri Lanka
Journal of Functional Foods | Year: 2013
Millets rank six in the world cereal grain production. In Africa and Asia, these underutilized grains play a major role in the food security of millions of people. In addition to being a rich source of nutrients, millet grains have an abundance of phytochemicals, particularly phenolic compounds. This review will focus on the bioactivities and health benefits of millet phenolics as revealed by in vitro and in vivo studies. Phenolic compounds in millets are found in the soluble as well as insoluble-bound forms. Both hydroxybenzoic and hydroxycinnamic acids and their derivatives are notably present in different types of millet grains in varying proportion. Meanwhile, flavonoids exist mainly in the free form. A wide variation exists in the phenolic content and antioxidant capacity of millet grains. Further, millet grain phenolics, are bioaccessible, possess bioactivities against several pathophysiological conditions and may serve as potential natural sources of antioxidants in food and biological systems. While this review also shows the existence of a substantial body of evidence for in vitro antioxidant activity of millet grain phenolics, there is a clear gap for in vivo information. However, the use of millets, as nutraceuticals and specialty foods in disease risk reduction and overall health and wellness is warranted. © 2013 Elsevier Ltd.
Abeysinghe D.C.,Wayamba University of Sri Lanka
Acta Horticulturae | Year: 2015
The present study investigated the variations in major antioxidants (total phenolics and vitamin C) and total antioxidant capacity (TAC) of cashew apple between cultivars and during its maturity stages. Ferric Reducing Antioxidant Power (FRAP) assay was used to determine TAC. Total phenolic and vitamin C contents were identified by Folin-Ciocalteu method and titration with 2,6-dichlorophenolindophenol (DCP) dye respectively. Five maturity stages of cashew apple of cultivar 'SLCC M1' were tested for total phenolic and, vitamin C contents and TAC. Our result revealed that ripening increased the vitamin C content whereas the amounts of total phenolics and TAC in cashew apple decreased with ripening. Cashew apples of twelve cultivars were selected to study variation in total phenolic and, vitamin C contents and TAC among selected cultivars. Cashew apple of cultivar 'SLCC N14' had significantly the highest total phenolics content (534.4±17.2 mg GAE/100 g FW) and TAC (680.5±36.7 mg VCE/100 g FW) whereas, significantly the highest vitamin C content (287.8±16.1 mg/100 g FW) was observed in cultivar 'SLCC M2'. Significantly lowest total phenolic content (241.1±18.1 mg GAE/100 g FW), TAC (268.7±11.9 mg VCE/100 g FW) and vitamin C content (157.4±9.1 mg/100 g FW) were recorded in cashew apple of cultivar 'WUCC 21' when compared to other selected cultivars. The results indicate that, among all selected cultivars, cashew apple of cultivar 'SLCC N14' contains significantly higher total phenolics and TAC whereas, cashew apple of cultivar 'SLCC M2' reports significantly higher vitamin C content. Mature cashew apples contain higher amounts of vitamin C than immature stages of cashew apples and could therefore be used as a significant dietary source of antioxidants.
Tennakone K.,Wayamba University of Sri Lanka
International Journal of Theoretical Physics | Year: 2012
Ball lightning or faintly luminous floating spheres with radii of the order of ten centimeters appearing transiently in air notably during stormy weather continue to remain an unresolved phenomenon. It is suggested that these objects are organized structures constituted of an electrically charged spherical thin shell of electro-frozen dipole oriented water molecules carrying an electric charge, balanced by the internal negative pressure and outward electrostatic stress. A model presented, resembling the classical theory of the electron with Poincare stresses explain almost all observed attributes of this phenomenon. The possibility of realizing macroscopic spherical surface charge distributions in the vacuum and their implication on the problem of electron are commented. © 2011 Springer Science+Business Media, LLC.
Rathnayake K.M.,Wayamba University of Sri Lanka |
Madushani P.,Wayamba University of Sri Lanka |
Silva K.,Wayamba University of Sri Lanka
BMC Research Notes | Year: 2012
Background: Macro and micro nutrient deficiencies are public health concerns in most developing countries including Sri Lanka, partly due to monotonous, cereal-based diet that lacks diversity. The objective of the study was to assess validity of food variety score (FVS), dietary diversity score (DDS) and dietary serving score (DSS) as indicators of nutrient adequacy of rural elderly people in Sri Lanka. Findings. A sample of 200 apparently healthy elderly people >60y of age were studied. A single 24h recall was performed to compute dietary diversity indicators. Pearsons correlation was used to assess the utility of FVS, DDS and DSS as indicators of nutrient adequacy. Sensitivity (Se) and specificity (Spe) analysis were done to determine the most appropriate cut-off points for using FVS and DDS to categorize elderly people with adequate nutrient intake. The average (standard deviation) of the food variety score, dietary diversity score and dietary serving score was 8.4 (2), 4.4 (0.9) and 11.4 (2.5), respectively. Mean adequacy ratio (MAR) of 12 nutrients was 0.39 (39%). Pearsons correlation coefficients between MAR and FVS was 0.45 (P<0.01), for DDS it was 0.48 (P<0.01) and for DSS it was 0.58 (P<0.01). When maximizing sensitivity and specificity, the best cut-off point for achieving 50% of MAR was about 9 and 4.5 for FVS and DDS, respectively. Conclusion: In conclusion, FVS, DDS and DSS were useful proxy indicators of nutrient adequacy of rural elderly people in Sri Lanka. Indeed, the performance of the indicators is improved when considering the quantities of food consumed. © 2012 Rathnayake et al.; licensee BioMed Central Ltd.
Tennakone K.,Wayamba University of Sri Lanka
Journal of Electrostatics | Year: 2011
A theoretical model is presented to show that spherically symmetric and dynamically stable charge separated structures of net zero charge that store energy could be formed by balancing of electrostatic forces and air pressure. The model evaluates the stored energy, the magnitude of separated charge and the pulsation frequency in terms of one parameter, which is a characteristic linear dimension of the system. Implications of the model on ball lightning and earthquake lights are discussed. © 2011 Elsevier B.V.