Faculty of Science: Recent submissions

Now showing items 441-460 of 655

Image Classification of Paddy Field Insect Pests using Gradient-based Features

Venugoban, K.; Ramanan, A. (International Journal of Machine Learning and Computing, 2014-02)

Agriculture is one of the principal economic activities of the Jaffna peninsula in the Northern Province of Sri Lanka. Over 60% of the work force in the peninsula depends on agriculture for their livelihood. Paddy cultivation ...
A Wheel-based Side-view Car Detection using Snake Algorithm

Vinoharan, V.; Ramanan, A.; Kodituwakku, S. R. (IEEE, 2012-09-27)

Car detection is a challenging research area where the appearance has various changes due to different models, poses, scales, lighting conditions, background, occlusion and various image sizes. Amidst these external ...
Single Image Fog Removal based on Fusion Strategy

Thulasika, V.; Ramanan, A. (AIRCC, 2015-07-25)

Images of outdoor scenes are degraded by absorption and scattering by the suspended particles and water droplets in the atmosphere. The light coming from a scene towards the camera is attenuated by fog and is blended with ...
Establishment of Embryogenic Cell Suspension Culture of Chilli [Capsicum annum L. var. accuminatum Fingerh] for Somatic Embryogenesis

Nandakumar, J.; Bandara, J.M.R.S.; Peiris, S.E (1996)

Chilli [Capsicum annum L. var. accuminatum Fingerh] is one of the important spice crops ofSri Lanka. Embryogenic suspension cultures of chilli were developed with an objective to induce somatic embryogenesis Successful ...
Improvement of the Preliminary Test Estimator When Stochastic Restrictions are Available in Linear Regression Model

Arumairajan, S.; Wijekoon, P. (Scientific Research Publishing, 2013-08-16)

Ridge type estimators are used to estimate regression parameters in a multiple linear regression model when multicolinearity exists among predictor variables. When different estimators are available, preliminary test ...
Genetic differentiation among Sri Lankan traditional rice (Oryza sativa) varieties and wild rice species by AFLP markers

Gowri, R.; Jagathpriya, W.; Kumudu, F.; Rangika, S. (Blackwell Publishing Ltd, 2011-04-01)

Traditional rice varieties are one important component of the biodiversity of Sri Lanka. However, no proper studies have been performed on genetic diversity of the Sri Lankan traditional rice varieties used in our breeding ...
Plant Genetic Resources

Gowri, R.; Jagathpriya, W.; Kumudu, F.; Liyanage, A. (Cambridge University Press, 2011-07-01)

Sri Lanka has a valuable repository of germplasm collection due to the availability of a large number of different traditional and improved rice varieties. Molecular techniques can increase the effectiveness of traditional ...
Plant Genetic Resources

Gowri, R.; Jagathpriya, W.; Kumudu, F.; Liyanage, A. (Cambridge University Press, 2011-07-11)

Sri Lanka has a valuable repository of germplasm collection due to the availability of a large number of different traditional and improved rice varieties. Molecular techniques can increase the effectiveness of traditional ...
Bag-of-keypoints approach for Tamil handwritten character recognition using SVMs

Subashini, A.; Kodikara, N.D. (IEEE, 2011-09-01)

In this paper, the bag-of-keypoints approach for the off-line recognition of Tamil handwritten characters is investigated. Various pre-processing operations are performed on the digitised image to enhance the quality of ...
A novel SIFT-based codebook generation for handwritten Tamil character recognition

Subashini, A.; Kodikara, N.D. (IEEE, 2011-08-16)

A method for the off-line recognition of Tamil handwriting characters based on local feature extraction is investigated. In the proposed method each pre-processed character is represented by a set of local SIFT feature ...
A Preliminary Study for Sperm Sexing by Using Sucrose Density Gradients in Jersey Bull at Artificial Insemination Centre at Thirunelvely (Northern Province of Sri Lanka)

Nilani, K.; Eswaramohan, T.; Balasubramaniam, K. (IACSIT Press, Singapoore, 2012)

Sperm sexing rouses great interest due to extensive application in animal production and new separation techniques which present both better accuracy and low costs are necessary. Thus the present study was experimented ...
Diversity and Identification Key to the Species of Scorpions

Veronika, K.; Akilan, K.; Murugananthan, A.; Eswaramohan, T. (2013)

Taxonomic record on scorpion (Scorpiones: Arachnida) revealed the presence of three species of scorpions from Jaffna Peninsula during a field survey. They belong to two families, three genera and three species: the Buthids ...
A study on the effects of chilling period on sperm quality of Sannan and Jamunapari goats.

Eswaramohan, T.; Nilani, K.; Sureka, P.; Mahadhevan, P.; Balasubramaniam, K. (Islamic Azad University, 2014)

The objective of the present study was to examine the effects of chilling period on semen quality of Sannan and Jamunapari. Semen of goat breeds were collected with artificial vagina and chilled at 5-9°C. Volume, colour ...
Infrared Spectroscopy of Ammonia on Iron: Thermal Stability and the Influence of Potassium

Jyngaran, P.; Madden, D.C; King, D.A; Jenkins, S. (2014-05-15)

We report on reflection–absorption infrared spectroscopy investigations, supported by first-principles density functional theory, into the surface chemistry of NH3 on Fe{111}. Ammonia is found to adsorb intact at low ...
Hydrogenation of N over Fe{111}

Iyngaran, P.; Madden, D.C; Jenkins, S.J. (National Acad Sciences, 2011-01-18)

Over the past five decades, ultra high vacuum (uhv) techniques applied to well-defined single-crystal samples (the “surface science paradigm”) have transformed our understanding of fundamental surface chemistry. To translate ...
Stimulation of thermal stability of α-amylase from Bacillus icheniformis ATCC 6346 by treating with cations

Vengadaramana, A.; Balakumar, S.; Arasaratnam, V. (2012-08-01)

α-Amylases (1,4-α-D-glucan glucanohydrolase; E.C.3.2.1.1) catalyze the cleavage of α-1,4-glucosidic linkages in starch, glycogen, and various oligosaccharides. Thermostable α-amylases fromBacillus species are of great ...
Effect of organic fertilizers on the water holding capacity of soil in different terrains of Jaffna peninsula in Sri Lanka

Vengadaramana, A.; Jashothan, P.T.J. (2012-08-01)

Soil texture and organic matter content are the key components that determine soil water holding capacity (WHC). Management practices designed to improve soil structure are the main way to improve WHC. The object of this ...
Current Status of Marine Snakes from Jaffna Peninsula, Sri Lanka with Description of Hitherto Unrecorded Hydrophis fasciatus fasciatus (Schneider, 1799) [2008]

Abyerami, K.; Sivashanthini, K. (2008)

As only a few study reported on sea snakes of Sri Lanka, a study was undertaken from June 2003 to November 2004 in the coast of Jaffna Peninsula which lies in the Northern part of Sri Lanka. Out of the 121 specimens examined, ...
Production of Titanium Dioxide Nanoparticles and Nanostructures from Dye Wastewater Sludge - Characterisation and Evaluation of Photocatalytic activity

Saliby, I.J.; Shon, H.K.; Okour, Y.H.; Vigneswaran, S.; Senthilnanthanan, M.; Kandasamy, J. (Science and Technology Network Inc., 2010-01-31)

Producing a useful catalyst (TiO2) from sludge is possible after the incineration of sludge produced from the flocculation of wastewater by Ti-salts. In this study, TiO2 was successfully produced from dye wastewater sludge. ...
Salinity-tolerant larvae of mosquito vectors in the tropical coast of Jaffna, Sri Lanka and the effect of salinity on the toxicity of Bacillus thuringiensis to Aedes aegypti larvae

Jude, P.J.; Tharmasegaram, T.; Sivasubramaniyam, K.; Senthilnanthanan, M.; Kannathasan, S.; Raveendran, S.; Ramasamy, R.; Surendran, S.N. (BioMed Central, 2012-11-22)

Dengue, chikungunya, malaria, filariasis and Japanese encephalitis are common mosquito-bornediseases endemic to Sri Lanka. Aedes aegypti and Aedes albopictus, the major vectors of dengue, were recentlyshown to undergo ...

Now showing items 441-460 of 655

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