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.
Jayakody J.,Wayamba University of Sri Lanka |
Perera I.,University of Moratuwa
Proceedings of 2016 IEEE International Conference on Teaching, Assessment and Learning for Engineering, TALE 2016 | Year: 2016
Early identification of less-able students is very important to develop them towards their full potential. However due to the increasing student intakes in each year for a degree program, it is a difficult task to identify those students who require the guidance and monitoring from the beginning. Manual observation and data collections, which require additional workload, are time consuming and a challenge to practice. Therefore efficient and usable tool support is essential to assist academics to identify the less-able students during the early stages of a course module. In this paper we introduce such a tool with the use of business intelligence helping the academics to decide student capability levels based on graph analysis on Moodle user log data. Moodle dataset of MSc in Business Management students of University of Moratuwa was used for this research. The XML formatted data were extracted from Moodle logs and SQL Server Integration Services (SSIS) were used to enhance the extraction, transformation and loading process. Data cubes were analyzed with multidimensional queries. Graph visualization was used and a number of patterns were realized to identify the less-able students using following data of student activities: assignment submission, usage scenarios, and number of occasions the course pages and other resources were accessed. © 2016 IEEE.
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.
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.
Kankanamalage T.N.M.,Wayamba University of Sri Lanka |
Dharmadasa R.M.,Industrial Technology Institute |
Abeysinghe D.C.,Wayamba University of Sri Lanka |
Wijesekara R.G.S.,Wayamba University of Sri Lanka
Journal of Ethnopharmacology | Year: 2014
Ethnopharmacological relevance Sri Lanka has rich traditional systems of medicine, which cater to 60-70% of the rural population's primary health care needs. However, development of existing systems has been hindered by the unavailability of up-to-date information on medicinal materials and other related issues. For streamlining purposes, we investigated the present-day scenario of country's medicinal plant industry by gathering up-to-date information on the types of raw materials required, their aggregate quantities, heavily used and rare materials, family wise distribution, challenges faced by stakeholders as well as other pertinent issues. Materials and methods The present survey covered the selected government Ayurveda hospitals, traditional and Ayurveda practitioners, large and small-scale herbal drug and cosmetic manufactures, importers, collectors and Ayurveda commissioners throughout the country. A systematic questionnaire was distributed and face-to-face interviews were conducted. Collected data were tabulated and analyzed. Results A diverse range of medicinal materials, including 290 species (64.73%) from dried plants, 59 (13.17%) from fresh plants, 69 (15.40%) from minerals, 18 (4.02%) from animal sources and 12 (2.68%) from other sources were recorded. A total of 302 plant species belonging to 95 families, dominated by Leguminosae family, was listed. Out of these, 46 species belonging to 35 families were used intensively. A large portion of herbal materials was of completely local origin (71.13%) while 26% were imported and the rest (2.87%) can be obtained by both routes. Leaves were the most highly used part of the plant (22.2%). High price, poor quality, insufficient or totally absence of continuous supply and adulteration were the main constraints faced by the stakeholders. The unavailability of systematic cultivation and processing protocols, incorrect identification, and lack of proper quality control methodologies were identified as major challenges of the industry. Conclusion The present study revealed a currently bleak scenario of the medicinal material industry in Sri Lanka. The results clearly demonstrated the need to implement a national strategy to address the major challenges faced by different stakeholders. Information generated through this study could be effectively incorporated for the formulation of a sustainable development strategy for this industry. © 2014 Elsevier Ireland Ltd. All rights reserved.
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.