Journal of the National Science Foundation of Sri Lanka最新文献

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Empiricism and non-empirical research 经验主义和非经验研究
IF 0.5 4区 综合性期刊
Journal of the National Science Foundation of Sri Lanka Pub Date : 2022-12-31 DOI: 10.4038/jnsfsr.v50i4.11580
A. Abeysekera
{"title":"Empiricism and non-empirical research","authors":"A. Abeysekera","doi":"10.4038/jnsfsr.v50i4.11580","DOIUrl":"https://doi.org/10.4038/jnsfsr.v50i4.11580","url":null,"abstract":"","PeriodicalId":17429,"journal":{"name":"Journal of the National Science Foundation of Sri Lanka","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42340045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
M-polynomial and topological indices for the anti-tuberculosis drugs 抗结核药物的m -多项式和拓扑指标
IF 0.5 4区 综合性期刊
Journal of the National Science Foundation of Sri Lanka Pub Date : 2022-12-31 DOI: 10.4038/jnsfsr.v50i4.10786
TP Jude, P. Elango, M. Koneswaran
{"title":"M-polynomial and topological indices for the anti-tuberculosis drugs","authors":"TP Jude, P. Elango, M. Koneswaran","doi":"10.4038/jnsfsr.v50i4.10786","DOIUrl":"https://doi.org/10.4038/jnsfsr.v50i4.10786","url":null,"abstract":"","PeriodicalId":17429,"journal":{"name":"Journal of the National Science Foundation of Sri Lanka","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45211292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessment of marine turtle nesting habitats from Tangalle to the Kumbukkan Oya estuary in south-eastern Sri Lanka 斯里兰卡东南部Tangalle至Kumbukkan Oya河口海龟筑巢栖息地评估
IF 0.5 4区 综合性期刊
Journal of the National Science Foundation of Sri Lanka Pub Date : 2022-12-31 DOI: 10.4038/jnsfsr.v50i4.10674
SJ Perera, W. Perera, S. Goonatilake, K. Ekaratne, D. Wijesinghe, LV Perera, D. Chandranimal, A. Ediriweera
{"title":"Assessment of marine turtle nesting habitats from Tangalle to the Kumbukkan Oya estuary in south-eastern Sri Lanka","authors":"SJ Perera, W. Perera, S. Goonatilake, K. Ekaratne, D. Wijesinghe, LV Perera, D. Chandranimal, A. Ediriweera","doi":"10.4038/jnsfsr.v50i4.10674","DOIUrl":"https://doi.org/10.4038/jnsfsr.v50i4.10674","url":null,"abstract":"","PeriodicalId":17429,"journal":{"name":"Journal of the National Science Foundation of Sri Lanka","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47710116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis of polyethylene glycol-grafted graphite and effect of its loading on properties of natural rubber composites 聚乙二醇接枝石墨的合成及其负载对天然橡胶复合材料性能的影响
IF 0.5 4区 综合性期刊
Journal of the National Science Foundation of Sri Lanka Pub Date : 2022-12-31 DOI: 10.4038/jnsfsr.v50i4.10902
W. Sampath, Candida E. C. Fernando, D. Edirisinghe
{"title":"Synthesis of polyethylene glycol-grafted graphite and effect of its loading on properties of natural rubber composites","authors":"W. Sampath, Candida E. C. Fernando, D. Edirisinghe","doi":"10.4038/jnsfsr.v50i4.10902","DOIUrl":"https://doi.org/10.4038/jnsfsr.v50i4.10902","url":null,"abstract":"","PeriodicalId":17429,"journal":{"name":"Journal of the National Science Foundation of Sri Lanka","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44626408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A new multivariate transmuted family of distributions: theory and application for modelling of daily world COVID-19 cases 一种新的多变量变换分布族:全球日常COVID-19病例建模的理论与应用
IF 0.5 4区 综合性期刊
Journal of the National Science Foundation of Sri Lanka Pub Date : 2022-12-31 DOI: 10.4038/jnsfsr.v50i4.10621
Jaser Darwish, LI Al-Turk, MQ Shahbaz
{"title":"A new multivariate transmuted family of distributions: theory and application for modelling of daily world COVID-19 cases","authors":"Jaser Darwish, LI Al-Turk, MQ Shahbaz","doi":"10.4038/jnsfsr.v50i4.10621","DOIUrl":"https://doi.org/10.4038/jnsfsr.v50i4.10621","url":null,"abstract":"Multivariate distributions are helpful in the simultaneous modeling of several dependent random variables. The development of a unique multivariate distribution has been a difficult task and different multivariate versions of the same distribution are available. The need is, therefore, to suggest a method of obtaining a multivariate distribution from the univariate marginals. In this paper, we have proposed a new method of generating the multivariate families of distributions when information on univariate marginals is available. Specifically, we have proposed a multivariate family of distributions which provides a univariate transmuted family of distributions as marginal. The proposed family is a re-parameterization of the Cambanis (1977) family. Some properties of the proposed family of distributions have been studied. These properties include marginal and joint marginal distributions, conditional distributions, and marginal and conditional moments. We have also obtained the dependence measures alongside the maximum likelihood estimation of the parameters. The proposed multivariate family of distributions is studied for the Weibull baseline distributions giving rise to the multivariate transmuted Weibull (MTW) distribution. Real data application of the proposed MTW distribution is given in the context of modeling the daily COVID-19 cases of the World. It is observed that the proposed MTW distribution is a suitable fit for the joint modeling of the COVID-19 data. © 2022, National Science Foundation. All rights reserved.","PeriodicalId":17429,"journal":{"name":"Journal of the National Science Foundation of Sri Lanka","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42186638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Designing a closed-loop information flow model in bridging the market information gap among agriculture stakeholders in Sri Lanka 设计闭环信息流模型,弥合斯里兰卡农业利益相关者之间的市场信息差距
IF 0.5 4区 综合性期刊
Journal of the National Science Foundation of Sri Lanka Pub Date : 2022-12-31 DOI: 10.4038/jnsfsr.v50i4.10418
T. B. Mallikaarachchi, G. Samaraweera, A. Walisadeera, L. De Silva, S. Munasinghe
{"title":"Designing a closed-loop information flow model in bridging the market information gap among agriculture stakeholders in Sri Lanka","authors":"T. B. Mallikaarachchi, G. Samaraweera, A. Walisadeera, L. De Silva, S. Munasinghe","doi":"10.4038/jnsfsr.v50i4.10418","DOIUrl":"https://doi.org/10.4038/jnsfsr.v50i4.10418","url":null,"abstract":"","PeriodicalId":17429,"journal":{"name":"Journal of the National Science Foundation of Sri Lanka","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42352509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Simulation of coloured particles radiation spectra from black holes 黑洞彩色粒子辐射光谱的模拟
IF 0.5 4区 综合性期刊
Journal of the National Science Foundation of Sri Lanka Pub Date : 2022-12-31 DOI: 10.4038/jnsfsr.v50i4.10608
Cnt Wijewardhana, K. Gamalath
{"title":"Simulation of coloured particles radiation spectra from black holes","authors":"Cnt Wijewardhana, K. Gamalath","doi":"10.4038/jnsfsr.v50i4.10608","DOIUrl":"https://doi.org/10.4038/jnsfsr.v50i4.10608","url":null,"abstract":"","PeriodicalId":17429,"journal":{"name":"Journal of the National Science Foundation of Sri Lanka","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46611017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Developing a model to predict the propagation of sulphide stress corrosion of steel used for petroleum pipelines 建立了石油管道用钢硫化物应力腐蚀扩展预测模型
IF 0.5 4区 综合性期刊
Journal of the National Science Foundation of Sri Lanka Pub Date : 2022-12-31 DOI: 10.4038/jnsfsr.v50i4.10586
A. Manimendra, I. de Silva, R. Jayasundara
{"title":"Developing a model to predict the propagation of sulphide stress corrosion of steel used for petroleum pipelines","authors":"A. Manimendra, I. de Silva, R. Jayasundara","doi":"10.4038/jnsfsr.v50i4.10586","DOIUrl":"https://doi.org/10.4038/jnsfsr.v50i4.10586","url":null,"abstract":"","PeriodicalId":17429,"journal":{"name":"Journal of the National Science Foundation of Sri Lanka","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45762233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of instantaneous, daily and monthly statistics 2017-2021 of rooftop solar energy 2017-2021年屋顶太阳能瞬时、日、月统计分析
IF 0.5 4区 综合性期刊
Journal of the National Science Foundation of Sri Lanka Pub Date : 2022-12-31 DOI: 10.4038/jnsfsr.v50i4.11079
JR Lucas
{"title":"Analysis of instantaneous, daily and monthly statistics 2017-2021 of rooftop solar energy","authors":"JR Lucas","doi":"10.4038/jnsfsr.v50i4.11079","DOIUrl":"https://doi.org/10.4038/jnsfsr.v50i4.11079","url":null,"abstract":"","PeriodicalId":17429,"journal":{"name":"Journal of the National Science Foundation of Sri Lanka","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49302244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of oil level and type of solid insulator on creeping discharges propagating under an ac electric field 交流电场作用下蠕变放电的油位和固体绝缘子类型研究
IF 0.5 4区 综合性期刊
Journal of the National Science Foundation of Sri Lanka Pub Date : 2022-12-31 DOI: 10.4038/jnsfsr.v50i4.10641
S. Ediriweera, P.B. Jayarathna, R. Samarasinghe, R. Lucas
{"title":"Investigation of oil level and type of solid insulator on creeping discharges propagating under an ac electric field","authors":"S. Ediriweera, P.B. Jayarathna, R. Samarasinghe, R. Lucas","doi":"10.4038/jnsfsr.v50i4.10641","DOIUrl":"https://doi.org/10.4038/jnsfsr.v50i4.10641","url":null,"abstract":"","PeriodicalId":17429,"journal":{"name":"Journal of the National Science Foundation of Sri Lanka","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41469349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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