Pub Date : 2024-01-19DOI: 10.31893/multiscience.2024121
Thanh Quang Khai Lam
When designing the structure of a high-rise building, it is important to consider not only the load-bearing capacity of the entire building but also the issue of limiting horizontal displacement at the top of the building. In this study, the author used Etabs software to analyze and compare the horizontal displacement at the top of a building. The study focused on two different types of structural system: frame system (consisting of columns, beams, and floors) and shear walls (which consists just of reinforced concrete walls). The analysis was conducted in accordance with Vietnamese standards on loads and impacts, specifically TCVN2737:2023. The wind loads were applied to the geometric center of the structure. Research results suggest the impact of horizontal displacement at the top of high-rise buildings is significant. Additionally, it has been observed that the shear walls system shows an increased horizontal displacement value compared to the frame system.
{"title":"Horizontal displacement at the top of the building with frame and shear walls structures according to TCVN 2737:2023","authors":"Thanh Quang Khai Lam","doi":"10.31893/multiscience.2024121","DOIUrl":"https://doi.org/10.31893/multiscience.2024121","url":null,"abstract":"When designing the structure of a high-rise building, it is important to consider not only the load-bearing capacity of the entire building but also the issue of limiting horizontal displacement at the top of the building. In this study, the author used Etabs software to analyze and compare the horizontal displacement at the top of a building. The study focused on two different types of structural system: frame system (consisting of columns, beams, and floors) and shear walls (which consists just of reinforced concrete walls). The analysis was conducted in accordance with Vietnamese standards on loads and impacts, specifically TCVN2737:2023. The wind loads were applied to the geometric center of the structure. Research results suggest the impact of horizontal displacement at the top of high-rise buildings is significant. Additionally, it has been observed that the shear walls system shows an increased horizontal displacement value compared to the frame system.","PeriodicalId":218411,"journal":{"name":"Multidisciplinary Science Journal","volume":"476 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140502733","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}
Pub Date : 2024-01-19DOI: 10.31893/multiscience.2024120
Wan Mohd Azwan Wan Abaid, Sany Sanuri Mohd Mokhtar, Maha Mohammed Yusr
The purpose of this study is to concurrently test the effect of green market orientation and green supply chain management on establishing green knowledge management among Malaysian manufacturing companies. To empirically test the model, the authors developed quantitative research by collecting data from 115 manufacturing organisations operating in Malaysia. Partial least squares structural equation modelling was used to analyse the data. The results of the study reveal that green market orientation has a significant and direct positive effect on green knowledge management. Equally, green supply chain management has a direct positive and significant effect on green knowledge management. The findings of this study provide insights for practitioners, academia, and policymakers on how to use the selected variables to improve the sustainability performance of organisations.
{"title":"Green supply chain and market orientation: Catalysts for sustainable green knowledge management","authors":"Wan Mohd Azwan Wan Abaid, Sany Sanuri Mohd Mokhtar, Maha Mohammed Yusr","doi":"10.31893/multiscience.2024120","DOIUrl":"https://doi.org/10.31893/multiscience.2024120","url":null,"abstract":"The purpose of this study is to concurrently test the effect of green market orientation and green supply chain management on establishing green knowledge management among Malaysian manufacturing companies. To empirically test the model, the authors developed quantitative research by collecting data from 115 manufacturing organisations operating in Malaysia. Partial least squares structural equation modelling was used to analyse the data. The results of the study reveal that green market orientation has a significant and direct positive effect on green knowledge management. Equally, green supply chain management has a direct positive and significant effect on green knowledge management. The findings of this study provide insights for practitioners, academia, and policymakers on how to use the selected variables to improve the sustainability performance of organisations.","PeriodicalId":218411,"journal":{"name":"Multidisciplinary Science Journal","volume":"495 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140502673","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}
Pub Date : 2024-01-17DOI: 10.31893/multiscience.2024115
S. Hamid, Ameer Farhan Mohd Arzaman, Muhamad Amirul Razali, Nurul Ibtisyami Yasin, N. Masrom, Nurul Atiqah Abdullah Sabri, Marlina Margono
Malaysia's oil palm business is critical to the country's agricultural growth through its contributions to the country's Gross Domestic Product (GDP), foreign exchange, and employment. Oil palm is in high demand because it produces a high yield at a low cost of production. The Malaysian government declared that the Malaysian Sustainable Palm Oil Certification (MSPO) will be necessary by the end of 2020, as a result of greater awareness of environmental and sustainable issues. The objective of this study was to investigate how to deploy MSPO standards in the agriculture sector and to point out the benefit of applying MSPO standards in the agriculture sector. The case study approach and interviews were conducted based on the MSPO Certification, Oil Palm Management Certification and Supply Chain Certification. The findings demonstrated that with the guideline from the standards help to guide the farmers and the small holders to manage the waste, managing fertilizer packaging containers and poison container properly. The MSPO standards bring improvement towards the sale of palm oil and help reduce the problem regarding palm oil. MSPO certification are not only designed to address social and environmental issues but is also designed to demonstrate positive impacts as a result of implementation of better agricultural practices aimed at enhancing efficiency, farm management, improved social development and climate change adaptation.
{"title":"The deployment of the Malaysian sustainable palm oil standard in the agriculture sector","authors":"S. Hamid, Ameer Farhan Mohd Arzaman, Muhamad Amirul Razali, Nurul Ibtisyami Yasin, N. Masrom, Nurul Atiqah Abdullah Sabri, Marlina Margono","doi":"10.31893/multiscience.2024115","DOIUrl":"https://doi.org/10.31893/multiscience.2024115","url":null,"abstract":"Malaysia's oil palm business is critical to the country's agricultural growth through its contributions to the country's Gross Domestic Product (GDP), foreign exchange, and employment. Oil palm is in high demand because it produces a high yield at a low cost of production. The Malaysian government declared that the Malaysian Sustainable Palm Oil Certification (MSPO) will be necessary by the end of 2020, as a result of greater awareness of environmental and sustainable issues. The objective of this study was to investigate how to deploy MSPO standards in the agriculture sector and to point out the benefit of applying MSPO standards in the agriculture sector. The case study approach and interviews were conducted based on the MSPO Certification, Oil Palm Management Certification and Supply Chain Certification. The findings demonstrated that with the guideline from the standards help to guide the farmers and the small holders to manage the waste, managing fertilizer packaging containers and poison container properly. The MSPO standards bring improvement towards the sale of palm oil and help reduce the problem regarding palm oil. MSPO certification are not only designed to address social and environmental issues but is also designed to demonstrate positive impacts as a result of implementation of better agricultural practices aimed at enhancing efficiency, farm management, improved social development and climate change adaptation.","PeriodicalId":218411,"journal":{"name":"Multidisciplinary Science Journal","volume":"21 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140505367","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}
Pub Date : 2024-01-16DOI: 10.31893/multiscience.2024106
Truong Vu, Nguyen-Ha Nguyen-Vu, G. Tran-Thien, T. Duong-Vo, V. Tran-Chi
The number of students in Vietnam who start their own businesses is on the rise; therefore, it is necessary to conduct this research in order to determine the factors that influence the preparation of female students for business ownership and management. The study participants were selected using a technique known as convenience sampling. In July and August of 2021, the required data collection for the analysis occurred. Two hundred forty-four female students attending one of four institutions in Ho Chi Minh City, Vietnam, filled out the questionnaire. According to the findings of this study, academic year, major, and parental business license did not significantly impact female students' entrepreneurial preparedness. A further reality is that a person's readiness to engage in entrepreneurial activity was impacted by their knowledge of entrepreneurship, social norms, and behavioral control. There were differences in the ways in which criteria associated with permanent residences, such as central, province, and district, influence the entrepreneurial readiness of female students. The key finding highlights that characteristics significantly influence female students' readiness for entrepreneurship, distinguishing the impact of demographic factors on this preparedness. The outcomes offer valuable insights for female college students aspiring to become entrepreneurs and underscore the importance of further research to assess entrepreneurial readiness among Vietnamese students comprehensively.
{"title":"Entrepreneurial readiness of Vietnamese pedagogical student females","authors":"Truong Vu, Nguyen-Ha Nguyen-Vu, G. Tran-Thien, T. Duong-Vo, V. Tran-Chi","doi":"10.31893/multiscience.2024106","DOIUrl":"https://doi.org/10.31893/multiscience.2024106","url":null,"abstract":"The number of students in Vietnam who start their own businesses is on the rise; therefore, it is necessary to conduct this research in order to determine the factors that influence the preparation of female students for business ownership and management. The study participants were selected using a technique known as convenience sampling. In July and August of 2021, the required data collection for the analysis occurred. Two hundred forty-four female students attending one of four institutions in Ho Chi Minh City, Vietnam, filled out the questionnaire. According to the findings of this study, academic year, major, and parental business license did not significantly impact female students' entrepreneurial preparedness. A further reality is that a person's readiness to engage in entrepreneurial activity was impacted by their knowledge of entrepreneurship, social norms, and behavioral control. There were differences in the ways in which criteria associated with permanent residences, such as central, province, and district, influence the entrepreneurial readiness of female students. The key finding highlights that characteristics significantly influence female students' readiness for entrepreneurship, distinguishing the impact of demographic factors on this preparedness. The outcomes offer valuable insights for female college students aspiring to become entrepreneurs and underscore the importance of further research to assess entrepreneurial readiness among Vietnamese students comprehensively.","PeriodicalId":218411,"journal":{"name":"Multidisciplinary Science Journal","volume":"33 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140505870","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}
Pub Date : 2024-01-16DOI: 10.31893/multiscience.2024111
Sandeep Kumar Sharma, M. Khaliq
The illicit activist tampers the software for malcious purposes. The process of forensics examining and gathering evidence for software accused in forensic laboratories presents challenges in terms of software quality. Therefore, it is crucial to design and develop a framework, model, and dedicated standards for the forensic analysis of software quality. These resources can be employed for investigations, legal proceedings, as well as establishing criteria and standards for both past and present scenarios. The aim of the research work is to design a software-quality forensics framework for forensic investigation to the quality of software. The research primarily concentrates on developing a model for software quality assessment and identifying the pertinent existing standards through the conceptual framework of software quality forensics. The implementation of software quality forensics has improved the efficiency and effectiveness in investigating and managing incidents related to software quality. The proposed framework for software quality forensics allows for the evaluation and assessment of quality issues within specific software systems. To complement the software quality forensic framework, a comparative analysis has been conducted between existing software quality models and the proposed software quality forensic model.
{"title":"Design and development of software quality forensics framework and model","authors":"Sandeep Kumar Sharma, M. Khaliq","doi":"10.31893/multiscience.2024111","DOIUrl":"https://doi.org/10.31893/multiscience.2024111","url":null,"abstract":"The illicit activist tampers the software for malcious purposes. The process of forensics examining and gathering evidence for software accused in forensic laboratories presents challenges in terms of software quality. Therefore, it is crucial to design and develop a framework, model, and dedicated standards for the forensic analysis of software quality. These resources can be employed for investigations, legal proceedings, as well as establishing criteria and standards for both past and present scenarios. The aim of the research work is to design a software-quality forensics framework for forensic investigation to the quality of software. The research primarily concentrates on developing a model for software quality assessment and identifying the pertinent existing standards through the conceptual framework of software quality forensics. The implementation of software quality forensics has improved the efficiency and effectiveness in investigating and managing incidents related to software quality. The proposed framework for software quality forensics allows for the evaluation and assessment of quality issues within specific software systems. To complement the software quality forensic framework, a comparative analysis has been conducted between existing software quality models and the proposed software quality forensic model.","PeriodicalId":218411,"journal":{"name":"Multidisciplinary Science Journal","volume":"5 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140506394","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}
Pub Date : 2024-01-16DOI: 10.31893/multiscience.2024104
Nabeel Aslam, Arfan Shahzad, Ahsan Ali, Mohammed Albin Ahmed
Cloud computing has gained popularity for its cost-effectiveness. Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS) are not new technologies, but rather new ways of providing computing services over the internet based on previous concepts. For this reason, many organizations use cloud computing platforms for their computing needs. Cloud computing, however, raises some concerns for these organizations. Several studies have been done on security issues with cloud computing, but most of them focus on formal security issues. Informal security issues have not been seriously studied in the existing research, to our knowledge. Through this study, we investigate and model informal security requirements for cloud applications. To validate our approach, we implemented the model of informal security requirements in the CloudSim simulator.
{"title":"Modelling informal security requirements of cloud computing","authors":"Nabeel Aslam, Arfan Shahzad, Ahsan Ali, Mohammed Albin Ahmed","doi":"10.31893/multiscience.2024104","DOIUrl":"https://doi.org/10.31893/multiscience.2024104","url":null,"abstract":"Cloud computing has gained popularity for its cost-effectiveness. Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS) are not new technologies, but rather new ways of providing computing services over the internet based on previous concepts. For this reason, many organizations use cloud computing platforms for their computing needs. Cloud computing, however, raises some concerns for these organizations. Several studies have been done on security issues with cloud computing, but most of them focus on formal security issues. Informal security issues have not been seriously studied in the existing research, to our knowledge. Through this study, we investigate and model informal security requirements for cloud applications. To validate our approach, we implemented the model of informal security requirements in the CloudSim simulator.","PeriodicalId":218411,"journal":{"name":"Multidisciplinary Science Journal","volume":"5 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140506555","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}
Pub Date : 2024-01-16DOI: 10.31893/multiscience.2024108
Laura Sour
Despite being a popular tourist destination, state-level research on the business cycle in Mexico's tourism industry is lacking. This study aims to answer three research questions: Are the growth stages of the international tourism market similar across states? Are the growth stages of the domestic tourism market similar among entities? Is there a relation between the economic cycle of the international tourism market and the domestic market? We use the Markov Switching Model to estimate the business cycle of the tourism industry in each Mexican state from 1992 to 2017. We identify the most attractive states for international and domestic tourists. Notably, eleven of the coefficients belong to the economic cycle of the foreign tourist market, indicating a greater economic impact compared to the domestic market. The results show that each state has its own business cycle, requiring individual projections for each market. This information is relevant for tourism planners and policymakers to address the challenges posed by the SDGs.
{"title":"Examining the business cycle of the tourism industry in Mexico at the state level using the Markov Switching Model (1992 to 2017)","authors":"Laura Sour","doi":"10.31893/multiscience.2024108","DOIUrl":"https://doi.org/10.31893/multiscience.2024108","url":null,"abstract":"Despite being a popular tourist destination, state-level research on the business cycle in Mexico's tourism industry is lacking. This study aims to answer three research questions: Are the growth stages of the international tourism market similar across states? Are the growth stages of the domestic tourism market similar among entities? Is there a relation between the economic cycle of the international tourism market and the domestic market? We use the Markov Switching Model to estimate the business cycle of the tourism industry in each Mexican state from 1992 to 2017. We identify the most attractive states for international and domestic tourists. Notably, eleven of the coefficients belong to the economic cycle of the foreign tourist market, indicating a greater economic impact compared to the domestic market. The results show that each state has its own business cycle, requiring individual projections for each market. This information is relevant for tourism planners and policymakers to address the challenges posed by the SDGs.","PeriodicalId":218411,"journal":{"name":"Multidisciplinary Science Journal","volume":"73 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140505644","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}
Pub Date : 2024-01-16DOI: 10.31893/multiscience.2024107
O. Ubani, B. Uba, S. J. Modise, E. Okoye, Sylvia C. Omeazu, Chiamaka R. Ndibe, O. Umeh, C. U. Dokubo
Indiscriminate release of spent phone battery in the environment poses a danger to human and animal life. Assessment of their toxicity using bioassays, therefore, becomes imperative. In this study, the Organization for Economic Co-Operation and Development (OECD) standardized toxicity tests exhibited a high degree of sensitivity in evaluating various endpoints across different trophic levels and taxonomic groups. These tests encompass a range of parameters, including mortality rate (h), growth inhibition (ECx), germination, and root length (ECx), providing a comprehensive assessment of spent phone battery toxicity. The responses of Selenastrum capricornutum, Eisenia fetida, Brassica nigra and Sorghum bicolor to spent phone battery toxicity were investigated. Standard methods of analysis for heavy metal, microalgal toxicity, earthworm mortality and phytotoxicity were adopted. S. capricornutum, B. nigra and S. bicolor seeds were exposed for 72 h and 5 d at concentrations ranging from 0 to 100 mg/L or mg/kg while Eisenia fetida exposed for 48 h and 14 d at concentrations ranging from 0 mg/L to 2.10 LC50 mg/kg for Gionee phone battery and 0 mg/L to 3.50 LC50 mg/kg for Lenovo battery samples. The result showed that all the spent phone battery samples (Gionee and Lenovo) had WHO and FEPA exceeded the limits of the heavy metals analyzed. The order of toxicity to S. capricornutum growth is Lenovo > Gionee > positive control K2Cr2O7 after 72 h exposure. On E. fetida, Gionee > Lenovo after 48 h and 14th-day treatments while boric acid > Gionee > Lenovo as well as boric acid > Lenovo > Gionee were observed on B. nigra and S. bicolor, respectively after 5 d exposure. The responses of the model organisms in this study necessitate the establishment of stringent implemental management measures by government and environmental policymakers to effectively address the problems and challenges associated with e-waste.
{"title":"Responses of Selenastrum capricornutum, Eisenia fetida, Brassica nigra and Sorghum bicolor to sent phone battery toxicity","authors":"O. Ubani, B. Uba, S. J. Modise, E. Okoye, Sylvia C. Omeazu, Chiamaka R. Ndibe, O. Umeh, C. U. Dokubo","doi":"10.31893/multiscience.2024107","DOIUrl":"https://doi.org/10.31893/multiscience.2024107","url":null,"abstract":"Indiscriminate release of spent phone battery in the environment poses a danger to human and animal life. Assessment of their toxicity using bioassays, therefore, becomes imperative. In this study, the Organization for Economic Co-Operation and Development (OECD) standardized toxicity tests exhibited a high degree of sensitivity in evaluating various endpoints across different trophic levels and taxonomic groups. These tests encompass a range of parameters, including mortality rate (h), growth inhibition (ECx), germination, and root length (ECx), providing a comprehensive assessment of spent phone battery toxicity. The responses of Selenastrum capricornutum, Eisenia fetida, Brassica nigra and Sorghum bicolor to spent phone battery toxicity were investigated. Standard methods of analysis for heavy metal, microalgal toxicity, earthworm mortality and phytotoxicity were adopted. S. capricornutum, B. nigra and S. bicolor seeds were exposed for 72 h and 5 d at concentrations ranging from 0 to 100 mg/L or mg/kg while Eisenia fetida exposed for 48 h and 14 d at concentrations ranging from 0 mg/L to 2.10 LC50 mg/kg for Gionee phone battery and 0 mg/L to 3.50 LC50 mg/kg for Lenovo battery samples. The result showed that all the spent phone battery samples (Gionee and Lenovo) had WHO and FEPA exceeded the limits of the heavy metals analyzed. The order of toxicity to S. capricornutum growth is Lenovo > Gionee > positive control K2Cr2O7 after 72 h exposure. On E. fetida, Gionee > Lenovo after 48 h and 14th-day treatments while boric acid > Gionee > Lenovo as well as boric acid > Lenovo > Gionee were observed on B. nigra and S. bicolor, respectively after 5 d exposure. The responses of the model organisms in this study necessitate the establishment of stringent implemental management measures by government and environmental policymakers to effectively address the problems and challenges associated with e-waste.","PeriodicalId":218411,"journal":{"name":"Multidisciplinary Science Journal","volume":"47 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140506187","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}
Pub Date : 2024-01-13DOI: 10.31893/multiscience.2024105
Said Mohafid, L. Stour, A. Agoumi
The siltation of dam reservoirs is the phenomenon that most embarrasses dam managers and water reservoir operators. In Morocco, this phenomenon affects all the watersheds to different degrees. Dam managers schedule bathymetric measurement companies to estimate the quantities of mud deposited in reservoirs. These companies are neither regular in time nor generalized on the 152 large dams of the Kingdom because of the high cost of the bathymetry operations. In our research work, the bathymetric data available for about a century were collected, checked, corrected, and sorted to be exploited.In the next step, we extrapolated over time and updated the siltation rates for each dam according to the trend curves of the evolution of silted volume. Most of these trend curves were linear. For the nonlinear curves, we looked for explanations throughout history. These are dams whose reservoirs have undergone human intervention such as desilting operations or emptying of reservoirs, or following natural phenomena such as drought or exceptional floods. The research work subsequently made it possible to estimate the annual siltation rates for 53 large dams whose reservoir capacities total approximately 92% of that of the entire country. It also revealed an overall siltation rate of 18.14% for the entire country and rates ranging from 10% to 52% for each watershed. The discussions of these results in this article give explanations on the highest rates, based on the natural data of the watersheds in question. These results will help decision-makers to define the priorities of desilting operations or the construction of new dams, help investors and industrialists wishing to extract and use mud from dam reservoirs as raw material, and can also be used in various scientific fields such as dam reservoir management, flood risk prevention, environmental impact studies, spatial planning, and research and development studies.
{"title":"Quantitative assessment of sedimentation in Moroccan dam reservoirs: analysis and projections","authors":"Said Mohafid, L. Stour, A. Agoumi","doi":"10.31893/multiscience.2024105","DOIUrl":"https://doi.org/10.31893/multiscience.2024105","url":null,"abstract":"The siltation of dam reservoirs is the phenomenon that most embarrasses dam managers and water reservoir operators. In Morocco, this phenomenon affects all the watersheds to different degrees. Dam managers schedule bathymetric measurement companies to estimate the quantities of mud deposited in reservoirs. These companies are neither regular in time nor generalized on the 152 large dams of the Kingdom because of the high cost of the bathymetry operations. In our research work, the bathymetric data available for about a century were collected, checked, corrected, and sorted to be exploited.In the next step, we extrapolated over time and updated the siltation rates for each dam according to the trend curves of the evolution of silted volume. Most of these trend curves were linear. For the nonlinear curves, we looked for explanations throughout history. These are dams whose reservoirs have undergone human intervention such as desilting operations or emptying of reservoirs, or following natural phenomena such as drought or exceptional floods. The research work subsequently made it possible to estimate the annual siltation rates for 53 large dams whose reservoir capacities total approximately 92% of that of the entire country. It also revealed an overall siltation rate of 18.14% for the entire country and rates ranging from 10% to 52% for each watershed. The discussions of these results in this article give explanations on the highest rates, based on the natural data of the watersheds in question. These results will help decision-makers to define the priorities of desilting operations or the construction of new dams, help investors and industrialists wishing to extract and use mud from dam reservoirs as raw material, and can also be used in various scientific fields such as dam reservoir management, flood risk prevention, environmental impact studies, spatial planning, and research and development studies.\u0000 ","PeriodicalId":218411,"journal":{"name":"Multidisciplinary Science Journal","volume":"21 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140509091","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}
Pub Date : 2024-01-11DOI: 10.31893/multiscience.2024102
Ahmad Zaki, Seplika Yadi, Eki Khoirullianum, Rikki Suganda, Candra Agung Wibisono
Considerable innovation has been applied to concrete material to achieve specific properties such as density, strength, environmental sustainability, cost-effectiveness, among others. This study focused on the replacement of a portion of the aggregate with oil palm shell (OPS) to utilize previously underutilized waste. Concrete containing OPS typically exhibits reduced compressive strength compared to standard concrete. To enhance the compressive and flexural strength of OPS-infused concrete, the introduction of fibers was explored as an innovative measure. A particular focus was placed on using fibers from discarded masks due to the Covid-19 outbreak in Indonesia and globally. The non-biodegradable nature of polypropylene fibers in these masks necessitates further measures to minimize waste. Different proportions of OPS were incorporated into the concrete mix: 0%, 25%, 50%, 75%, and 100%, with each mix incorporating 0.20% mask fiber and 0.25% superplasticizer. Compressive strength testing employed cylindrical specimens with a diameter of 75 mm and a height of 150 mm, while flexural strength was assessed using beam specimens measuring 100 x 100 x 500 mm. The baseline compressive strength for concrete without OPS measured 17.76 MPa. The results of flexural strength testing revealed the highest value of 1.67 MPa for the 0% OPS mix and the lowest, 0.49 MPa, for the 100% OPS mix. Statistical analysis via analysis of variance (ANOVA) highlighted a notably significant correlation between the treatment combinations involving compressive strength and the replacement of OPS as coarse aggregate.
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