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Ruhuna Journal of Science最新文献

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Attitudes and perceptions of farmers on the African grey parrot in Oba Hills National Park, Osun State, Nigeria 农民对尼日利亚奥孙州奥巴山国家公园非洲灰鹦鹉的态度和看法
Ruhuna Journal of Science Pub Date : 2022-12-31 DOI: 10.4038/rjs.v13i2.125
A. Adewumi, B. Owolabi, O. S. Okeyode, A. Adenle
{"title":"Attitudes and perceptions of farmers on the African grey parrot in Oba Hills National Park, Osun State, Nigeria","authors":"A. Adewumi, B. Owolabi, O. S. Okeyode, A. Adenle","doi":"10.4038/rjs.v13i2.125","DOIUrl":"https://doi.org/10.4038/rjs.v13i2.125","url":null,"abstract":"This study is focused on people’s perceptions and attitudes on the population decline of African Grey Parrots (Psittacus erithacus) in Osun state, Nigeria. Data was collected through a structured questionnaire. The population of the study area comprises 234 farmers from communities in the study area. Data were analyzed using descriptive statistics, T-test, Pearson Correlation, and Chi-square test. The results revealed that 78% of the respondents were male, while 22% were female. Majority (51%) of the farmers were between the age group of 41-59 years, Christians (54%), indigenes (76%), and Nigerian (69%). As revealed from the study, 77.5% of the farmers were familiar with the African Grey Parrot (Psittacus erithacus). The farmers showed great knowledge of the bird and the ecosystem services rendered, thus they have a positive perception and attitude about African Grey Parrot conservation. The study recommended that the bird conservation club be initiated by forest management which should include youths, adults, and school teachers in the area in order to enlist farmers in the bird conservation program.","PeriodicalId":56207,"journal":{"name":"Ruhuna Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47522055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Gel properties of agar from two Gracilaria species in Sri Lanka and development of food jellies 斯里兰卡两种葛属植物琼脂的凝胶特性及食用果冻的开发
Ruhuna Journal of Science Pub Date : 2022-08-18 DOI: 10.4038/rjs.v13i1.111
P.S. De Alwis, I. Wijesekara
{"title":"Gel properties of agar from two Gracilaria species in Sri Lanka and development of food jellies","authors":"P.S. De Alwis, I. Wijesekara","doi":"10.4038/rjs.v13i1.111","DOIUrl":"https://doi.org/10.4038/rjs.v13i1.111","url":null,"abstract":"","PeriodicalId":56207,"journal":{"name":"Ruhuna Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47163309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Abundance and ecological classification of fish Species: A case study of Owalla Reservoir, Osun State, Nigeria 鱼类物种的丰度和生态分类：以尼日利亚奥孙州Owalla水库为例
Ruhuna Journal of Science Pub Date : 2022-08-18 DOI: 10.4038/rjs.v13i1.115
A. Iyiola, Y. Taiwo, B. Asiedu
{"title":"Abundance and ecological classification of fish Species: A case study of Owalla Reservoir, Osun State, Nigeria","authors":"A. Iyiola, Y. Taiwo, B. Asiedu","doi":"10.4038/rjs.v13i1.115","DOIUrl":"https://doi.org/10.4038/rjs.v13i1.115","url":null,"abstract":"","PeriodicalId":56207,"journal":{"name":"Ruhuna Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48220594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Characterization and risk evaluation of water samples collected from boreholes situated around a dumpsite in Obalende, Lagos, Nigeria 尼日利亚拉各斯Obalende垃圾场周围钻孔采集的水样的特征和风险评估
Ruhuna Journal of Science Pub Date : 2022-08-18 DOI: 10.4038/rjs.v13i1.114
T. Yahaya, Y. Abdulganiyu, T. Salisu, A. Abdulazeez, A. Izuafa, Sofiat A. Sanni, Abdulmumini I. Ahmadu
{"title":"Characterization and risk evaluation of water samples collected from boreholes situated around a dumpsite in Obalende, Lagos, Nigeria","authors":"T. Yahaya, Y. Abdulganiyu, T. Salisu, A. Abdulazeez, A. Izuafa, Sofiat A. Sanni, Abdulmumini I. Ahmadu","doi":"10.4038/rjs.v13i1.114","DOIUrl":"https://doi.org/10.4038/rjs.v13i1.114","url":null,"abstract":"","PeriodicalId":56207,"journal":{"name":"Ruhuna Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48341840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Classification of the level and the type of hearing loss based on the analysis of audiograms of workers exposed to high level of occupational noise 基于高水平职业性噪声暴露工人听力图分析的听力损失水平和类型分类
Ruhuna Journal of Science Pub Date : 2022-08-18 DOI: 10.4038/rjs.v13i1.116
S. Sethunga, J. Bodhika, U. I. P. Abeysuriya, W. Dharmarathna, S. Wickremasinghe
{"title":"Classification of the level and the type of hearing loss based on the analysis of audiograms of workers exposed to high level of occupational noise","authors":"S. Sethunga, J. Bodhika, U. I. P. Abeysuriya, W. Dharmarathna, S. Wickremasinghe","doi":"10.4038/rjs.v13i1.116","DOIUrl":"https://doi.org/10.4038/rjs.v13i1.116","url":null,"abstract":"This paper presents some health effects of workers exposed to high occupational noise for a long period. The main objective of this study was to classify the level and the type of hearing loss of such workers plus to study the effects on their health. Out of a sample of 99 workers exposed to 85 dB(A) or more occupational noise, 73 (74%) workers who were exposed over 40 hours per week for five years or more were selected for this study. Their hearing levels were tested audio-metrically and audiograms of Air Conduction (AC) and Bone Conduction (BC) measurements were taken. Depending on the degree of Hearing Loss (HL) of audiograms, the sample was classified into Normal hearing (0-25 dB(A)): 10.5%, Mild HL (26-40 dB(A)): 67.0%, Moderate HL (41-55 dB(A)): 21.75%, and Moderate-to-severe HL (56-70 dB(A)): 0.75%. None of these falls into Severe HL or Profound HL categories. Based on the HL and the configuration of audiograms of AC and BC measurements, 89.5% of the sample was classified as Conductive Hearing Loss (CHL 2.25%), Sensorineural Hearing Loss (SNHL 85.75%), and Mixed Hearing Loss (MHL 1.5%). Some SNHL samples were identified as Meniere’s disease 19%, Acoustic Trauma 12%, and Noise-Induced Hearing Loss (NIHL) 6%. NIHL were recorded among highly exposed workers to noise in the frequency range 3000-6000 Hz. Percentage statistics of various levels of hearing levels along with associated symptoms based on the response to the questionnaire are also presented.","PeriodicalId":56207,"journal":{"name":"Ruhuna Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46816335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 Statistical Downscaling Model (SDSM) projected future rainfall in Northwestern, Western and Southern provinces of Sri Lanka 统计降尺度模型（SDSM）预测斯里兰卡西北、西部和南部省份未来降雨量的分析
Ruhuna Journal of Science Pub Date : 2022-08-18 DOI: 10.4038/rjs.v13i1.117
Mohamed Riflan, M. Gunathilake, Jayanga T. Samarasinghe, Isuru M. Bandara, Imiya M. Chathuranika, Upaka S. Rathnayake
{"title":"Analysis of Statistical Downscaling Model (SDSM) projected future rainfall in Northwestern, Western and Southern provinces of Sri Lanka","authors":"Mohamed Riflan, M. Gunathilake, Jayanga T. Samarasinghe, Isuru M. Bandara, Imiya M. Chathuranika, Upaka S. Rathnayake","doi":"10.4038/rjs.v13i1.117","DOIUrl":"https://doi.org/10.4038/rjs.v13i1.117","url":null,"abstract":"","PeriodicalId":56207,"journal":{"name":"Ruhuna Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42787065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Generalized Stochastic Restricted LARS Algorithm 广义随机约束LARS算法
Ruhuna Journal of Science Pub Date : 2022-08-18 DOI: 10.4038/rjs.v13i1.112
Kayanan Manickavasagar, P. Wijekoon
{"title":"Generalized Stochastic Restricted LARS Algorithm","authors":"Kayanan Manickavasagar, P. Wijekoon","doi":"10.4038/rjs.v13i1.112","DOIUrl":"https://doi.org/10.4038/rjs.v13i1.112","url":null,"abstract":"The Least Absolute Shrinkage and Selection Operator (LASSO) is used to tackle both the multicollinearity issue and the variable selection concurrently in the linear regression model. The Least Angle Regression (LARS) algorithm has been used widely to produce LASSO solutions. However, this algorithm is unreliable when high multicollinearity exists among regressor variables. One solution to improve the estimation of regression parameters when multicollinearity exists is adding preliminary information about the regression coefficient to the model as either exact linear restrictions or stochastic linear restrictions. Based on this solution, this article proposed a generalized version of the stochastic restricted LARS algorithm, which combines LASSO with existing stochastic restricted estimators. Further, we examined the performance of the proposed algorithm by employing a Monte Carlo simulation study and a numerical example.","PeriodicalId":56207,"journal":{"name":"Ruhuna Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46953570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Trends in appliance usage and electricity consumption in households: A case study in Hambantota District, Sri Lanka 家庭电器使用和电力消耗的趋势：斯里兰卡汉班托塔区的案例研究
Ruhuna Journal of Science Pub Date : 2022-08-18 DOI: 10.4038/rjs.v13i1.113
C. E. Kankanamge, P. Gunasekara
{"title":"Trends in appliance usage and electricity consumption in households: A case study in Hambantota District, Sri Lanka","authors":"C. E. Kankanamge, P. Gunasekara","doi":"10.4038/rjs.v13i1.113","DOIUrl":"https://doi.org/10.4038/rjs.v13i1.113","url":null,"abstract":"","PeriodicalId":56207,"journal":{"name":"Ruhuna Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47435210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Air pollution affects lichen species richness, species density, relative growth form abundance and their secondary metabolite production: a case study in Kandy district, Sri Lanka 空气污染影响地衣的物种丰富度、物种密度、相对生长形式丰度及其次级代谢产物的产生：斯里兰卡康提区的一个案例研究
Ruhuna Journal of Science Pub Date : 2021-12-31 DOI: 10.4038/rjs.v12i2.106
W. Gunawardana, E. Edirisinghe, C. Abayasekara, A. Athukorala
{"title":"Air pollution affects lichen species richness, species density, relative growth form abundance and their secondary metabolite production: a case study in Kandy district, Sri Lanka","authors":"W. Gunawardana, E. Edirisinghe, C. Abayasekara, A. Athukorala","doi":"10.4038/rjs.v12i2.106","DOIUrl":"https://doi.org/10.4038/rjs.v12i2.106","url":null,"abstract":"","PeriodicalId":56207,"journal":{"name":"Ruhuna Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46184230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Exploring marketing channels and market margins of tuna species: A case study of Negombo fishery harbour in Sri Lanka in 2018 金枪鱼品种营销渠道与市场边际探索——以2018年斯里兰卡尼甘布渔港为例
Ruhuna Journal of Science Pub Date : 2021-12-31 DOI: 10.4038/rjs.v12i2.103
K. Edirisinghe, J. Wansapala, I. Wickramasinghe, A. Warahena
{"title":"Exploring marketing channels and market margins of tuna species: A case study of Negombo fishery harbour in Sri Lanka in 2018","authors":"K. Edirisinghe, J. Wansapala, I. Wickramasinghe, A. Warahena","doi":"10.4038/rjs.v12i2.103","DOIUrl":"https://doi.org/10.4038/rjs.v12i2.103","url":null,"abstract":"","PeriodicalId":56207,"journal":{"name":"Ruhuna Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48864458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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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