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- ItemA comparative study on the field performance of selected cowpea (Vigna unguiculata) cultivars in the sandy regosols of Batticaloa district(Eastern University, Sri Lanka, 2008)
- ItemIdentification and distribution of worker ants at Vantharumoolai region, Eastern province, a preliminary communication,(Eastern University, Sri Lanka, 2008)
- ItemFast Algorithms for Sequence Pattern Recognition in Massive Datasets(Eastern University, Sri Lanka, 2008)Sequential Pattern Mining is the process of applying data mining techniques to a sequential database for the purpose of discovering the correlation relationships that exist among an ordered list of events. The patterns can be used to focus on the retailing industry, including attached mailing, add-on sales and customer satisfaction. In this vaper, I present fast and efficient algorithms called AprioriAllSID and GSPSID for mining sequential patterns that are fundamentally different from known algorithms like Apriori All and GSP (Generalized Sequential Patterns). The algorithm has been implemented on an experimental basis and its performance studied. The performance study shows that the proposed algorithms have an excellent performance over the best existing algorithms.
- ItemHistopathalogy of Procamallanous lonis ( Yamaguti ,1935) from economically important fin fish within Batticaloa lagoon.(Eastern University, Sri Lanka, 2008)Procamallanus lonis (Family Camallaidae) infecting Siganus sp. at higher prevalences was found to cause growth retardation. This study, therefore, focused principally on the histopathology caused by the above parasite on a population of Siganus from the Batticaloa Lagoon. The inflammatory response of the host provides sufficient clues to the pathogenicity of this parasite on economically important host; these are tissue invading parasites are more pathogenic rather than merely being intestine inhabiting parasites. The infections of Procamallanus lonis in Siganus sp., Glossogobious giuris, Tachysurus sp. and Ompak bimaculatus were studied to assess their pathological effect. Infected tissue samples, notably from the intestine, liver and kidney were fixed in 10% formalin and processed for wax embedding. All tissues were cassetted, labeled and processed for histological sectioning. Five micrometre thick sections were cut and stained with haematoxlin and eosin. In the intestine infections elicited an inflammatory response leading to a light epitheloid encapsulation of the parasite. The encysted parasite causing pressure changes to the surrounding tissue. Heavy nematode infections were accompanied by hypertrophy of the tissue and the formation of a hyper plastic tissue reaction. Suchmarked tissue reactions may alter the absorptive nature of the intestine and presumably, the health condition of the host.
- ItemYield performance of red onion (Allium ascalonium. L) under different Irrigation Management in Jaffna Peninsula(Eastern University, Sri Lanka, 2008)Study discusses the yield performance of red onion under sprinkler irrigation with different moisture regime in DL3 agro climatic zone in calcic red latasols in Jaffna. The objectives of the study to assess yield performance of red onion under different irrigation management. A field trail was designed with five treatments; conventional practice by farmer as control, basin and raised bed planting with 40 cb and 60 cb hydraulic potential with three replicates. The average time period required to bring the field capacity to 10 cb from 40 cb and 60 cb was 45 min and 60 min respectively with 3.5 I /min discharge rate. The efficiency of crop water consumption at 40 cb planted on raised bed was 1.66 kg/m1/mm and at 60 cb planted on raised bed was 1.53 kg/m2/mm. Treatment with 40 cb tension planted on raised bed with sprinkler irrigation recorded the highest yield of 6.04 kg/m2 and followed by the treatment with 60 cb tension planted on raised bed (5.59 kg/m2) When compared with control those were more than 30% and 20%, respectively.