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Now showing items 421-440 of 1109

Preliminary Study of Waste-Delivered Biosorbents to Remove Nutrients from Rice Mill Wastewater

Uduwarage, U.D.T.M.; Devaisy, S. (Faculty of Applied Science, 2020-12-02)

The objective of this study was to compare the performance of waste derived biosorbents - rice hull and peanut hull in removing nutrients from rice mill wastewater. Batch adsorption experiments were conducted for both ...
Adoption and Impact of Natural Farming Practices in Batticaloa District

Thivahary, G.; Viharnaa, R. (Faculty of Applied Science, 2020-12-02)

The practice of natural farming system significantly reduces the production costs. Currently, natural farming system is practiced by farmers in various parts of Sri Lanka. A substantial number of smallholder farmers from ...
Bioethanol Production from Azolla filiculoides using Saccharomyces cerevisiae

Christy, E. J. S. B. A.; Kapilan, R.; Wickramasinghe, I.; Wijesekara, W. L. I. (Faculty of Applied Science, 2020-12-02)

Ethanol can be produced from any material that contains sugar, starches and cellulosic materials are used as an ideal and inexpensive raw material in the production of ethanol by fermentation. Cellulosic substrates are ...
Perception of Human-Elephant Conflict in Pokkunutenna, Sri Lanka: A Case Study

Keerthanaram, T.; Lahiru Pramod, J.V.G.; Riskhan, M.N.; Udaranga, H.N.S. C. (Faculty of Applied Science, 2020-12-02)

Pokkunutenna located adjacent to Udawalawe National park, and Dahiyagala Sanctuary faces human-elephant conflict (HEC) significantly and is perceived as high in human casualties. A questionnaire survey and field assessment ...
Preliminary Assessment of Marine phytoplankton Distribution and Fishing in Sri Lanka

Yasanthika, W.H.P.; Keerthanaram, T.; Nimalka Sanjeewani, H.K.; Naveendrakumar, G.; Akther, M.S.R. (Faculty of Applied Science, 2020-12-02)

Phytoplanktons are the primary producers in marine food webs. The concentration of the chlorophyll-a (Chl-a) shows their abundance among the habitat, estimated by using remote sensing data. Marine fish harvest mainly depends ...
High-Resolution Data for Capturing Wetland Vegetation Using Object-Based Classification Methods

Madurapperuma, B.D.; Kahara, S.N.; Hernandez, K.B.; Corro, L.M. (Faculty of Applied Science, 2020-12-02)

The purpose of this study is to use the Unmanned Aerial Systems (UAS) images for mapping wetland vegetation using object-based classification methods and to compare its performance with cropland data layers. The UAS imagery ...
Paddy Production Efficiency of the Farmers Under Tank Irrigation Systems in Tamil Nadu.

Nanthakumaran, A.; Palanisami, K. (Faculty of Agriculture, University of Jaffna, Sri Lanka, 2010-06-02)

Excessive input usage by the farmers excepting to reap a higher cost of production ultimately leads to bring down their profit as well as wastage of scarce resources. The presence of shortfalls in efficiency means that ...
Assessment of the Potential of Groundwater Supplementation by Estimating the Stabilization Value of Tank Irrigation Systems in Tamil Nadu, India

Nanthakumaran, A.; Palanisami, K. (Postgraduate Institute of Agriculture, University of Peradeniya, 2011-01-10)

Irrigation tanks are one of the oldest and most important common property water resources in the resource poor regions especially in South India and Sri Lanka. Tank irrigation accounts for more than 30% of total irrigated ...
Water market in the tank irrigation systems in Tamil Nadu

Nanthakumaran, A.; Palanisami, K. (International Conference on Sustainable Built Environments (ICSBE-2010) Kandy,, 2010-12-13)

Continued progress in water resources development in the future will depend upon the utilization of the existing irrigation potential. An irrigation tank is a small reservoir to catch and store water during rainy season ...
Identification of cascade systems and assessment of the performance of village tanks in Kovilkulam Agrarian Centre Area” ICSBE 2016

Sudusinghe, S.A.; Nanthakumaran, A.; Kadupitiya, H.K. (7th International Conference on Sustainable with Environment, Srilanka., 2016-12-16)

Vavuniya district of Sri Lanka consists of nearly 674 minor irrigation tanks which are in a cascade system supplying water for 10900 ha (10900 × 104 m2) of paddy land. But there is no documentation available for the cascade ...
Farmer participation on water management in the tank irrigated systems in Tamil Nadu

Nanthakumaran, A.; Palanisami, K. (International Conference on Sustainable Built Environments (ICSBE-2010) Kandy, 2010-12-13)

Farmer participation is found to be a solution to arrest the deterioration of the tank irrigation system which is observed in Tamil Nadu state. The study was undertaken with the specific objective of identifying the ...
Crop residues with fodder trees to produce good quality silage

Fernando, K.S.D.; Nanthakumaran, A. (SEUSL, 2018-12-17)

Silage is the compressed and fermented green forage crops under anaerobic condition, usually in a silo. Crop residues can be used as feed for cattle during the dry season by ensiling them as silage. The aim of this study ...
Phase Space Error Control with Variable Time-Stepping Algorithms applied to the Forward Euler method for Dynamical Systems

Thilaganathan, S.; Vigneswaran, R. (University of Jaffna, 2016-08-12)

We consider a phase space stability error control for numerical simulation of dynamical systems. Tony Humphries and Vigneswaran, R., in “Phase space stability error control with variable time-stepping Runge-Kutta methods ...
Phase space theta error control with general explicit Runge-Kutta methods for dynamical systems

Thilaganathan, S.; Vigneswaran, R.; Samarathunga, D.M. (PGIS, 2019-10-11)

Variable time-stepping algorithms are often used to solve the dynamical systems, defined by autonomous initial value ordinary differential equations =f, y(0)=y0 m, where f : is a Lipschitz continuous function. Standard ...
Limitations on numerical iterative solution of elliptic two dimensional partial differential equations

Wijesuriya, W.M.R.M.; Thilaganathan, S. (Faculty of Applied Science, 2020-12-02)

Numerical iterative methods are applied for the solution of two dimensional Elliptic partial differential equations such as Laplace’s and Poisson’s equations. These kinds of differential equations have specific applications ...
Phase space error control with variable time-stepping algorithms applied to the forward Euler method for autonomous dynamical systems

Vigneswaran, R.; Thilaganathan, S. (Advances in mathematical sciences, knowvel, 2019-03-31)

We consider a phase space stability error control for numerical simulation of dynamical systems. Standard adaptive algorithm used to solve the linear systems perform well during the finite time of integration with fixed ...
A Combined Error Control with Forward Euler Method for Dynamical Systems

Vigneswaran, R.; Thilaganathan, S. (World Academy of Science, Engineering and Technology, 2016-05-12)

Variable time-stepping algorithms for solving dynamical systems performed poorly for long time computations which pass close to a fixed point. To overcome this difficulty, several authors considered phase space error ...
Tetrakis-1,2,4,5-(bis(3,5-dimethylphenyl)phosphino)benzene (Me16tpbz): A soluble and spectroscopically simple variant of the 1,2,4,5-tetraphosphinobenzene ligand platform

Selvachandran, M.; Kumar, Satyendra; Zhang, Xiaodong; Mague, J.L.; Donahue, J.P. (ELSEVIER, 2021-03-01)

A preparation of 1,2,4,5-tetrakis(bis(3,5-dimethylphenyl) phosphino)benzene (Me16tpbz) has been devised as a two-step synthesis beginning with bis(3,5- dimethylphenyl) chlorophosphine and 1,2,4,5-tetrafluorobenzene, albeit ...
Antibacterial Activity and Phytochemicals of Sequential Solvent Extracts of Solanum Trilobatum

Malathy, S.; Jeyadevan, J.P.; Pathmanathan, K. (University of Jaffna, 2012-07-20)

Solanum trilobatum which is known as Toothuvilai in Tamil has been widely used to treat respiratory disorders, especially bronchial asthma. Therefore this study was designed to test the antibacterial activity and phytochemical ...
Antimicrobial Analysis of Polygonam barbatum Leaf Extracts

Loganathan, P.; Malathy, P. (Institute of Environmental Professionals Sri Lanka: 2014, 2014-08-21)

Polygonum barbatum, known as atalari (in Tamil) or ratu kimbulwenna (in Sinhala), are perennial herbs of the family polygonaceae have been widely used anciently to treat various ailments including infections, fever, pain ...

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