Sustainability Agri Food and Environmental Research最新文献_第7页

Identification of risk factors leading to cost and time overrun in B-O-T projects 确定在B-O-T项目中导致成本和时间超支的风险因素

Sustainability Agri Food and Environmental Research Pub Date : 2021-03-12 DOI: 10.7770/safer-v10n1-art2466

A. M. Mathew, Neena S Lal

{"title":"Identification of risk factors leading to cost and time overrun in B-O-T projects","authors":"A. M. Mathew, Neena S Lal","doi":"10.7770/safer-v10n1-art2466","DOIUrl":"https://doi.org/10.7770/safer-v10n1-art2466","url":null,"abstract":"As infrastructural investments are vital in developing countries, it’ll not solely facilitate to foster the economic growth of a nation, however it’ll additionally act as a platform within which new kinds of partnership and collaboration may be developed. The developments of BOT have attracted participation of native and foreign non-public sector capitalist to secure funding and to deliver projects on time, within the budget and to the desired specifications. There are many complexities in projects because of the variety of factors in project’s trend and also the dependence of project primarily on national factors. Because of these complexities and their long-term operation, the projects meet with uncertainty and numerous risks. Effective risk management methods and good managerial skills are required in guaranteeing the success of the project. In recent years, due to substantial increase in the amount of construction companies along with the changes in the government administrations, the construction projects are exposed to cost and time overrun and has huge impact on the progress of works within the industry. Although, the sector is considered to be a key driver of economic growth, time and cost overruns threaten to limit the sector’s potential to help achieve the desired growth and ensure efficient capital expenditure. \u0000Keywords—BOT, cost overrun, delays, risk","PeriodicalId":30590,"journal":{"name":"Sustainability Agri Food and Environmental Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41758014","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

Structural applicability of plastic incorporated concrete 塑性掺入混凝土的结构适用性

Sustainability Agri Food and Environmental Research Pub Date : 2021-03-12 DOI: 10.7770/safer-v10n1-art2469

Aleesha Anna Saju, K. Smitha

引用次数: 0

Effectiveness of agricultural wastes in soil stabilization. 农业废弃物在土壤稳定中的有效性。

Sustainability Agri Food and Environmental Research Pub Date : 2021-03-11 DOI: 10.7770/safer-v10n1-art2452

D. Dauda, Manju Dominic

{"title":"Effectiveness of agricultural wastes in soil stabilization.","authors":"D. Dauda, Manju Dominic","doi":"10.7770/safer-v10n1-art2452","DOIUrl":"https://doi.org/10.7770/safer-v10n1-art2452","url":null,"abstract":"Many ways have been sought to improve soils, especially expansive soils which have been problematic to structures and pavements built over them and soil stabilization seems to be one of the effective ways. But soil stabilization in itself is not cost-effective hence the introduction of agricultural wastes being researched on and seen as a cheaper means to be used as stabilizing agents which helps in minimizing the cost of soil stabilization, thereby reducing the problem of waste disposal. Agricultural wastes like Rice Husk Ash, Bagasse Ash, Sugarcane Straw Ash, Saw Dust Ash, Coconut Husk Ash, Millet Husk Ash, Corn Cob Ash, Locust Bean Pod Ash, Cassava Peel Ash and Bamboo Leaf Ash have been experimented with in stabilizing soils and as well, serving as supplementary cementitious materials for cement in concrete production. The strengths of the soils and the concrete stabilized with these wastes were seen to improve significantly and their effectiveness was estimated based on an average optimum value. Agricultural waste processing Industries can be set up to help in the massive production of these natural stabilizers which would lessen the cost of soil stabilization using cement and chemicals and also generally reduce problems that are associated with waste disposal, helping in waste management. \u0000Keywords—expansive soils, soil stabilization, agricultural wastes","PeriodicalId":30590,"journal":{"name":"Sustainability Agri Food and Environmental Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46261287","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

Comparative study of finite element analysis of steel silos with rectangular and I stiffeners 矩形和I型加劲肋钢筒仓有限元分析的比较研究

Sustainability Agri Food and Environmental Research Pub Date : 2021-03-11 DOI: 10.7770/safer-v10n1-art2457

P. Lakshmi, Neethu Elsa Anil

引用次数: 0

A feasibility study on calcareous soil stabilization using polymers in Barka region. 巴尔卡地区聚合物固化钙质土壤的可行性研究。

Sustainability Agri Food and Environmental Research Pub Date : 2021-03-11 DOI: 10.7770/safer-v10n1-art2454

S. Satyanarayana, Mohammed Al Jahwari

{"title":"A feasibility study on calcareous soil stabilization using polymers in Barka region.","authors":"S. Satyanarayana, Mohammed Al Jahwari","doi":"10.7770/safer-v10n1-art2454","DOIUrl":"https://doi.org/10.7770/safer-v10n1-art2454","url":null,"abstract":"In the Gulf region most of the soils require soil stabilization to increase soil bearing capacity for construction of safe and sustainable buildings. The soils are stabilized either by physical stabilization, chemical stabilization or by mechanical stabilization. The aim of this project is to stabilize calcareous soil in the Barka region with synthetic polymers. The soil samples from the Barka region collected by using standard soil sampling methods. The synthetic polymer was mixed with the calcareous soil in 1%, 3% and 5%. The soil samples were tested for sieve analysis, Atterberg Limit, Particle Density, Proctor test and California Bearing Ratio test before and after addition of synthetic polymer. It was observed that there is a positive impact on the geotechnical properties of soil with the addition of Polymer. The optimum moisture content of the soil reduced and the maximum dry density of the soil increased. The optimum results were found at 5% addition of polymer where the optimum moisture content was found out to be 12.6% and the maximum dry density was found out to be 1.997 Mg/m3. The Atterberg limit test to show that the plasticity index of the soil reduced with the addition of polymer and the optimum results were found out at 5% addition of polymer. Finally, the CBR test results determine that the soil bearing capacity increases with the addition of Polymer. After the addition of 5% Polymer, the CBR value was found out to be 27.465% compared to 14.19% for the fresh calcareous soil. The results are encouraging. \u0000Keywords: Atterberg Limit, Calcareous soil, CBR, polymer, stabilization.","PeriodicalId":30590,"journal":{"name":"Sustainability Agri Food and Environmental Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41836740","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

A review on analysis of ferrocement panels 钢丝网水泥板分析综述

Sustainability Agri Food and Environmental Research Pub Date : 2021-03-11 DOI: 10.7770/safer-v10n1-art2453

M.M. Nabeela, P. Krishnan, C. Prabha

引用次数: 0

Impact of Covid-19 on Tourism Sector in Nepal. 新冠肺炎对尼泊尔旅游业的影响。

Sustainability Agri Food and Environmental Research Pub Date : 2021-03-10 DOI: 10.7770/SAFER-V9N1-ART2396

K. P. Panthhe, C. Kokate

{"title":"Impact of Covid-19 on Tourism Sector in Nepal.","authors":"K. P. Panthhe, C. Kokate","doi":"10.7770/SAFER-V9N1-ART2396","DOIUrl":"https://doi.org/10.7770/SAFER-V9N1-ART2396","url":null,"abstract":"Tourism is an important source of foreign exchange earnings for the government and contributes to the livelihood of millions in developing countries. The purpose of this paper is to explore and illuminate the preliminary impacts of COVID-19 in tourism sector in Nepal and further the paper puts forward policy recommendations for government to avert the worst effects and facilitate recovery. In Nepal, the travel and tourism sector contributes to 8 percent of GDP, 6.7 percent of total employment, and it generates 6 percent of the total foreign exchange earnings. Nepal Tourism Board estimates that loss of 85.2 billion USD monthly from tourism sector only and three in five employees lost their jobs due to COVID-19 in Nepal. The “Visit Nepal 2020” campaign had cancelled which aimed to attract 2 million tourists in the country this year. Tourism sector has already suffered a huge loss, and it is going to take quite to restore. The government should form special task force to create economic response package that will support Nepalese, their job, their businesses from the global impact of COVID-19, and to ready the economy to recover. \u0000Keywords: Covid-19, Tourism, Economy, Nepal","PeriodicalId":30590,"journal":{"name":"Sustainability Agri Food and Environmental Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44967984","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

Mesocosm study of microalgae in different weather conditions 不同天气条件下微藻的中尺度研究

Sustainability Agri Food and Environmental Research Pub Date : 2021-03-10 DOI: 10.7770/safer-v0n0-art2156

Munay Abdulqadir Alteerah, Mohammad Noor Amal Azmai, H. Omar, A. Ismail

{"title":"Mesocosm study of microalgae in different weather conditions","authors":"Munay Abdulqadir Alteerah, Mohammad Noor Amal Azmai, H. Omar, A. Ismail","doi":"10.7770/safer-v0n0-art2156","DOIUrl":"https://doi.org/10.7770/safer-v0n0-art2156","url":null,"abstract":"Microalgae have valuable contributions in carbon dioxide sequestration. There are no much investigations about motivation of mix microalgae productivity in outdoor cultures. This study aims to evaluate microalgae biomass production in outdoor mesocosms under different weather conditions. The experiment was done in Tilapia pond in the hatchery of fisheries of Universiti Putra Malaysia. Weather parameters were recorded daily. Microalgae seeds were obtained from Tilapia pond effluent and added to eight floating aerated mesocosms. Mesocosms were divided into four treatments. Two g triple supper phosphate: 20g Urea were used as fertilizers. Physical and chemical conditions, microalgae primary productivity and biomass, and species composition were measured every two days. Three cycles were categorized as mix, wet and dry cycles based on weather recording scores. Water quality parameters in treatments and controls cultures showed significant variations. Primary production variables were higher in the fertilized non-sheltered mesocosms (treatment 1). Productivity variables were lower in the dry cycle and higher in the mix cycle. The highest value of fixed CO2 was (3.2) mg/L/d in treatment 1 in the mix cycle, while the lowest value was (0.11) mg/L/d in treatment 3 and control 1 in dry cycle. Changes in weather patterns are seen in the light and temperature values. Microalgae biomass was lower in dry weather conditions because of effect of high air temperature. Weather conditions and different treatments significantly influenced microalgae species composition, due to the sensitivity in some of them to different light intensities. Chlorophytes were the most abundant due to their ability to adapt with different culture conditions. Sustainability, Agri, Food and Environmental Research, (ISSN: 0719-3726), 8(X), 2020: http://dx.doi.org/10.7770/safer-V0N0-art2156","PeriodicalId":30590,"journal":{"name":"Sustainability Agri Food and Environmental Research","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42657762","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

Geospatial Dynamics of Cropping pattern and Agricultural Efficiency in Kashmir Valley-A Northwestern Himalayan Region, India 克什米尔谷地种植格局与农业效率的地理空间动态——西北喜马拉雅地区

Sustainability Agri Food and Environmental Research Pub Date : 2021-03-10 DOI: 10.7770/safer-v0n0-art1913

S. A. Lone, Ishtiaq A. Mayer, Javaid Ah. Tali

{"title":"Geospatial Dynamics of Cropping pattern and Agricultural Efficiency in Kashmir Valley-A Northwestern Himalayan Region, India","authors":"S. A. Lone, Ishtiaq A. Mayer, Javaid Ah. Tali","doi":"10.7770/safer-v0n0-art1913","DOIUrl":"https://doi.org/10.7770/safer-v0n0-art1913","url":null,"abstract":"Food (in)security and agricultural efficiency is a major challenge in many of the world’s mountain ranges. The particular physical characteristics of mountains and associated socioeconomic factors, mountain regions all over the world face challenges in terms of food security and cropping pattern, although at different levels. Mountains in developing countries are sites of poverty. About 40 percent of the mountain population or nearly 300 million people are estimated to be vulnerable to food insecurity, of these, nearly 90 percent live in rural areas and almost half of those are likely to be chronically hungry. The present study also focuses on the regional disparities in agricultural efficiency and cropping pattern across different tehsils of Kashmir Valley-A north-western part of Himalayas. The study was carried out across thirty-nine spatial units (Tehsils) among different districts of Kashmir valley in GIS and remote sensing environment. Both primary and secondary data was employed. The study shows that the productivity of paddy, maize, and wheat is showing an increasing trend among all tehsils of Kashmir valley from 2011 to 2017 but the area under these crops is decreasing at an alarming rate leading a food deficit of 21.70 percent. So, agriculture planning is badly needed to curb this grave problem and impose restrictions to land conversion a burning issue nowadays","PeriodicalId":30590,"journal":{"name":"Sustainability Agri Food and Environmental Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47291850","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

Investigation of water quality from Damanga estuary through the water quality indexing Gujarat 利用水质指数对古吉拉特邦达曼加河口水质进行调查

Sustainability Agri Food and Environmental Research Pub Date : 2021-03-10 DOI: 10.7770/safer-v9n2-art2356

S. S. Patel, S. Sahoo

{"title":"Investigation of water quality from Damanga estuary through the water quality indexing Gujarat","authors":"S. S. Patel, S. Sahoo","doi":"10.7770/safer-v9n2-art2356","DOIUrl":"https://doi.org/10.7770/safer-v9n2-art2356","url":null,"abstract":"The seasonal investigation about the water quality from Damanganga river estuary on two habitats downstream and upstream was carried out from January to December 2019 containing three major seasons: winter, summer and monsoon. For this monitoring activity total 29 parameters (24 physico-chemical parameters and 5 heavy metals) were analyzed. Multivariate analyses suggested inter dependency among these studied parameters. Water Quality Index is computed based on the major fluctuated and affected parameters. The calculated values of WQI for all three seasons ranged from 122.84 to 173.82 which suggested poor water quality of the water body. WQI values of the investigation area proposed that the estuarine water quality is deteriorated due to high value of presented heavy metals (Aluminum, Iron, Manganese, Boron and Zinc), Chloride, Ammonium and Sulfate in water sample. In this case, the downstream station is having accessional pollutant contaminations while the upstream station is having diminutive pollutant contaminants. Temporally, the dominant frailty found during the winter followed by summer and monsoon. This study field exhibited poor quality of water; the reason behind this might be the impressive surrounding industrial zone as well as other anthropogenic activities. There is quite normal probability distribution expressed by the represented water quality data at the both habitats. The Bray-Curtis cluster analysis shows different percentage similarity level between the water quality parameters. ","PeriodicalId":30590,"journal":{"name":"Sustainability Agri Food and Environmental Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44485708","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