Volume 3(1)http://www.digital.lib.esn.ac.lk//handle/123456789/12582024-03-29T02:36:10Z2024-03-29T02:36:10ZA stochastic analysis of the long tern rainfall of Batticaloa in relation to crop-climatic patternsC. Elankumaranhttp://www.digital.lib.esn.ac.lk//handle/123456789/17102019-04-02T01:49:20Z2003-01-01T00:00:00ZA stochastic analysis of the long tern rainfall of Batticaloa in relation to crop-climatic patterns
C. Elankumaran
Long term monthly rainfall records (1870-1985) was subjected to statistical analysis known as 'Markov Chain Modelling'. This work in the field of 'Stochastic Analysis' proved to be a very valuable technique in Agricultural Planning. Long-term data series has been classified into several states or levels of rainfall by using various degrees of standard deviations. The long-term probabilities obtained for classified states give much insight about the data series and this classification could be correlated effectively with crop production. It is also found that this classification very much suites with paddy cultivation in the Batticaloa district and our findings will be helpful for water resources management in the future.
2003-01-01T00:00:00ZCollision handling of Polyhedral Objects-A surveyS.Kanaganathanhttp://www.digital.lib.esn.ac.lk//handle/123456789/17082019-04-02T01:49:01Z2003-01-01T00:00:00ZCollision handling of Polyhedral Objects-A survey
S.Kanaganathan
A survey of collision detection and collision response algorithms in Virtual Reality environment is given. Data structure to represent objects in Virtual Reality environment are also discussed. A parallel implementation of collision handling algorithm is given and an application of it to pulping industry is described.
2003-01-01T00:00:00ZWillingness of Sri Lankan farmers to pay for a scheme to conserve elephants: Exploratory studyRanjith Bandara, Clem Tisdellhttp://www.digital.lib.esn.ac.lk//handle/123456789/17062019-04-02T01:49:18Z2003-01-01T00:00:00ZWillingness of Sri Lankan farmers to pay for a scheme to conserve elephants: Exploratory study
Ranjith Bandara, Clem Tisdell
This paper explores the feasibility of adopting an integrated economic approach to raise farmers' tolerance of the presence of elephants on their farming lands. Responses to this approach were sought from a sample of 350 farmers in the areas affected by human elephant conflict in the Northwestern province of Sri Lanka. Results from a contingent valuation survey of their willingness to pay for a scheme to conserve elephants are also reported. Two separate Logit regression analyses were undertaken to examine the factors that influence the farmers' responses for the payment principle question and their opinions on the integrated economic approach. Although found that the majority of the respondents expressed their willingness to pay for the proposed scheme and supported for the implementation of the integrated approach, there is insufficient data yet to determine if their support and financial contribution would be sufficient to set up this programme and also to predict its economic viability. Nevertheless, the overall finding of this study provides an improved economic assessment of the fanners' attitudes towards the wild elephant in Sri Lanka. At the same time the study indicated that contrary to commonly held assumptions, farmers in this developing country do support wildlife conservation.
2003-01-01T00:00:00ZAnti microbial properties of Lantana camara leavesS.Rajadurai, S.Kanagasingamhttp://www.digital.lib.esn.ac.lk//handle/123456789/17052019-04-02T01:49:16Z2003-01-01T00:00:00ZAnti microbial properties of Lantana camara leaves
S.Rajadurai, S.Kanagasingam
Lantana camarai is a perennial weed belongs to the family Verbenaceae, Antimicrobial properties of the leaf of Lantana camara were studied in the laboratory. The results show that the di-ether extract of Lantana camara leaf possesses the property of anti microbial activity. The leaf extract in di-ether suppressed the growth of Aspergillus, Mucor and Rhizopus fungi in culture media for 48 hours. The same leaf extract also prevented bacterial growth in culture media for more than two weeks. Cut tuber decay of potato in the soil caused by soil microbs was effectively prevented when the cut tubers were planted after covering the cut surface with Lantana camara leaves.
2003-01-01T00:00:00Z