Construction methods have barely changed since the last industrial revolution, but new project requirements are subject to change every day. Including sustainability and new technologies that produce user and environmentally friendly projects is now a requirement in almost every country. Big data (BD) are mainly characterised by improving the decision making process through data analysis. Adopting BD in the construction industry is expected to impact efficiency positively in design and construction activities. However, it requires a change in the industry’s culture and the adoption of digital approaches to be implemented fully. This paper addresses the key drivers for the adoption of BD in the construction industry of the Dominican Republic. Qualitative research was implemented to explore the topic due to the scarce information available. Twenty-one semi-structured interviews were analysed using thematic analysis. In some cases, the participants provided their points of view based on their experience with similar technologies such as building information modelling and ‘Internet of things’. The data analysis identified nine critical drivers, classified as internal and external. The internal drivers are knowledge of BD benefits to the organisation, impact on competitiveness, technology awareness, solution to company’s needs, organisation’s technology-driven culture and client’s requirements. Similarly, the internal drivers are industry motivation, regulatory framework and technology change adaptability. This paper sheds light on the motivations behind adopting BD and helps understand the industry’s needs. It also delivers evidence on the need for improved training for present and future professionals focused on developing digital skills.
{"title":"Key drivers for Big Data adoption in the Dominican Republic construction industry: an empirical study","authors":"Paola Reyes-Veras, Suresh Renukappa, Subashini Suresh","doi":"10.1680/jensu.21.00067","DOIUrl":"https://doi.org/10.1680/jensu.21.00067","url":null,"abstract":"Construction methods have barely changed since the last industrial revolution, but new project requirements are subject to change every day. Including sustainability and new technologies that produce user and environmentally friendly projects is now a requirement in almost every country. Big data (BD) are mainly characterised by improving the decision making process through data analysis. Adopting BD in the construction industry is expected to impact efficiency positively in design and construction activities. However, it requires a change in the industry’s culture and the adoption of digital approaches to be implemented fully. This paper addresses the key drivers for the adoption of BD in the construction industry of the Dominican Republic. Qualitative research was implemented to explore the topic due to the scarce information available. Twenty-one semi-structured interviews were analysed using thematic analysis. In some cases, the participants provided their points of view based on their experience with similar technologies such as building information modelling and ‘Internet of things’. The data analysis identified nine critical drivers, classified as internal and external. The internal drivers are knowledge of BD benefits to the organisation, impact on competitiveness, technology awareness, solution to company’s needs, organisation’s technology-driven culture and client’s requirements. Similarly, the internal drivers are industry motivation, regulatory framework and technology change adaptability. This paper sheds light on the motivations behind adopting BD and helps understand the industry’s needs. It also delivers evidence on the need for improved training for present and future professionals focused on developing digital skills.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":"97 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135765701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rosemary Horry, Colin A Booth, Abdul-Majeed Mahamadu
Implementing and using environmental management systems (EMSs) in the architecture, engineering and construction (AEC) sectors has received worldwide attention but never through a phenomenological lens. This study investigates the ‘lived experiences’ of experts who have implemented and used ISO 14001 in AEC organisations based in the UK. Using a qualitative research strategy of semi-structured interviews, extensive analysis of the conversations reveals several themes – namely, participants believe that ISO 14001 is not just an environmental business tool, ISO 14001 offers a means of delivering sustainability, ISO 14001 accreditation opens doors for business accruement and, moreover, ISO 14001 is more than a badge, rather it is a modern-day business necessity. The study also reveals that not all organisations asking for ISO 14001 have the accreditation themselves. Based on this evidence, and contrary to previous studies that have proposed that EMSs are chiefly implemented to save costs and comply with legislation, it seems that box ticking as part of the tendering process is now the major motivation for organisations to attain and maintain International Organization for Standardization accreditation. Further, concerns are expressed that some organisations are unwilling to state their sustainability objectives or embed their operations within an EMS that will be audited because it could emphasise their poor performance to stakeholders.
{"title":"Implementing Environmental management systems in the architecture, engineering and construction sectors","authors":"Rosemary Horry, Colin A Booth, Abdul-Majeed Mahamadu","doi":"10.1680/jensu.23.00031","DOIUrl":"https://doi.org/10.1680/jensu.23.00031","url":null,"abstract":"Implementing and using environmental management systems (EMSs) in the architecture, engineering and construction (AEC) sectors has received worldwide attention but never through a phenomenological lens. This study investigates the ‘lived experiences’ of experts who have implemented and used ISO 14001 in AEC organisations based in the UK. Using a qualitative research strategy of semi-structured interviews, extensive analysis of the conversations reveals several themes – namely, participants believe that ISO 14001 is not just an environmental business tool, ISO 14001 offers a means of delivering sustainability, ISO 14001 accreditation opens doors for business accruement and, moreover, ISO 14001 is more than a badge, rather it is a modern-day business necessity. The study also reveals that not all organisations asking for ISO 14001 have the accreditation themselves. Based on this evidence, and contrary to previous studies that have proposed that EMSs are chiefly implemented to save costs and comply with legislation, it seems that box ticking as part of the tendering process is now the major motivation for organisations to attain and maintain International Organization for Standardization accreditation. Further, concerns are expressed that some organisations are unwilling to state their sustainability objectives or embed their operations within an EMS that will be audited because it could emphasise their poor performance to stakeholders.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":"68 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136018272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Juyang Wu, Sha Ma, Ran Wang, Feiqi Ou, Yan Liang, Weigang Zhao, Kaize Xie, Shupeng Wang
Prefabricated construction is essential for realising green, efficient and sustainable development of rail transit. However, limited space in foundation pits and cross-interference with inner struts mean that the advantages of existing prefabrication technology cannot be leveraged effectively to build subway stations under open excavation with inner support. In this paper, this problem is addressed by introducing a modular design method and two novel connection technologies. The proposed modular design method is sufficiently adaptable to balance the use of space between the station structure and the inner struts. The two proposed connection technologies provide efficient ways to assemble different concrete segments with two newly developed joints, namely a CHC joint and a flexible lock joint, in the circumferential and longitudinal directions, respectively. The first application of this fully prefabricated scheme in the Shenzhen Metro shows the huge potential of this technology for constructing subway stations under open-cut conditions, and its advantages in technical, economic and social aspects reveal wide application prospects in rail transit.
{"title":"A novel technique for constructing prefabricated subway stations under open excavation with inner support","authors":"Juyang Wu, Sha Ma, Ran Wang, Feiqi Ou, Yan Liang, Weigang Zhao, Kaize Xie, Shupeng Wang","doi":"10.1680/jensu.23.00015","DOIUrl":"https://doi.org/10.1680/jensu.23.00015","url":null,"abstract":"Prefabricated construction is essential for realising green, efficient and sustainable development of rail transit. However, limited space in foundation pits and cross-interference with inner struts mean that the advantages of existing prefabrication technology cannot be leveraged effectively to build subway stations under open excavation with inner support. In this paper, this problem is addressed by introducing a modular design method and two novel connection technologies. The proposed modular design method is sufficiently adaptable to balance the use of space between the station structure and the inner struts. The two proposed connection technologies provide efficient ways to assemble different concrete segments with two newly developed joints, namely a CHC joint and a flexible lock joint, in the circumferential and longitudinal directions, respectively. The first application of this fully prefabricated scheme in the Shenzhen Metro shows the huge potential of this technology for constructing subway stations under open-cut conditions, and its advantages in technical, economic and social aspects reveal wide application prospects in rail transit.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":"13 5-6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135266849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
There is a need within society to manage our impacts on the environment. The ISO14001 tool, based on the original BS7750 standard, was created in 1996 and subsequently updated in 2004 and 2015, has become the most prevalent type of Environmental Management Systems (EMS) adopted worldwide. Engineering and construction organisations wanting to implement ISO14001 should be fully acquainted with the advantages and disadvantages of adopting an EMS. Using the SCOPUS academic database, this study uses the PRISMA-method to identify and select publications (since 1999) for systematic review. Examination of the chosen articles (n=46) reveals a limited number of works per annum, with a peak in 2011 (n=6). The most frequently reported benefits are ‘enriching green corporate and public image’, ‘improved environmental performance’ and ‘regulation compliance’; whilst the barriers are ‘costs’, ‘lack of experience, expertise or knowledge’ and ‘lack of training’. Further analysis, using VOSviewer, has shown the network relationships between article keywords, notably that sustainability is increasingly listed (since 2011) and links with most other keywords. This suggests the engineering and construction sectors may be seeing beyond the cost barrier and are realising the positive difference ISO14001 can contribute to their operations, their local/national communities, and to the SDGs.
{"title":"Implementing ISO14001 in the engineering and construction sectors: a systematic review","authors":"R E Horry, C A Booth, A-M Mahamadu, S Ball","doi":"10.1680/jensu.23.00038","DOIUrl":"https://doi.org/10.1680/jensu.23.00038","url":null,"abstract":"There is a need within society to manage our impacts on the environment. The ISO14001 tool, based on the original BS7750 standard, was created in 1996 and subsequently updated in 2004 and 2015, has become the most prevalent type of Environmental Management Systems (EMS) adopted worldwide. Engineering and construction organisations wanting to implement ISO14001 should be fully acquainted with the advantages and disadvantages of adopting an EMS. Using the SCOPUS academic database, this study uses the PRISMA-method to identify and select publications (since 1999) for systematic review. Examination of the chosen articles (n=46) reveals a limited number of works per annum, with a peak in 2011 (n=6). The most frequently reported benefits are ‘enriching green corporate and public image’, ‘improved environmental performance’ and ‘regulation compliance’; whilst the barriers are ‘costs’, ‘lack of experience, expertise or knowledge’ and ‘lack of training’. Further analysis, using VOSviewer, has shown the network relationships between article keywords, notably that sustainability is increasingly listed (since 2011) and links with most other keywords. This suggests the engineering and construction sectors may be seeing beyond the cost barrier and are realising the positive difference ISO14001 can contribute to their operations, their local/national communities, and to the SDGs.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135274053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In China, the total energy consumption and greenhouse gas (GHG) emissions will reach considerable levels based on the current speed of urban rail transit system development. Based on the life-cycle assessment theory, this research constructs an urban rail transit system GHG emission assessment method, calculates emission outputs based on resource inputs from actual investigated data and makes a quantitative analysis of GHG emissions. The results show that in recent years, the GHG emission of urban rail transit construction and operation in China is between 2000 × 10 4 and 4200 × 10 4 tonnes of carbon dioxide equivalent (tCO 2 e) per year. The proportions of the construction and operational phases in this emission are 57 and 43%, respectively. In the construction phase, the GHG emission intensity per unit mileage of shield tunnels and per unit area of stations is about 1.3 × 10 4 tCO 2 e/km and 3.71 × 10 4 tCO 2 e/ha, respectively. In the operational phase, the GHG emission intensity per unit trip is 0.084 kg carbon dioxide equivalent/passenger-km. The entire life-cycle GHG emission per kilometre of urban rail transit systems is 11.69 × 10 4 tCO 2 e (with a service life of 50 years) in China. The construction phase and operation phase generated about 18.73 and 81.27% of this emission, respectively. The preliminary conclusions of this study may help shed light on the emission reduction potential of urban rail transit systems and the emission reduction targets in China.
{"title":"Calculation of greenhouse gas emissions of urban rail transit systems in China","authors":"Hao Guo, Liyuan Zhao, Shuo Zang, Yun Wei","doi":"10.1680/jensu.23.00001","DOIUrl":"https://doi.org/10.1680/jensu.23.00001","url":null,"abstract":"In China, the total energy consumption and greenhouse gas (GHG) emissions will reach considerable levels based on the current speed of urban rail transit system development. Based on the life-cycle assessment theory, this research constructs an urban rail transit system GHG emission assessment method, calculates emission outputs based on resource inputs from actual investigated data and makes a quantitative analysis of GHG emissions. The results show that in recent years, the GHG emission of urban rail transit construction and operation in China is between 2000 × 10 4 and 4200 × 10 4 tonnes of carbon dioxide equivalent (tCO 2 e) per year. The proportions of the construction and operational phases in this emission are 57 and 43%, respectively. In the construction phase, the GHG emission intensity per unit mileage of shield tunnels and per unit area of stations is about 1.3 × 10 4 tCO 2 e/km and 3.71 × 10 4 tCO 2 e/ha, respectively. In the operational phase, the GHG emission intensity per unit trip is 0.084 kg carbon dioxide equivalent/passenger-km. The entire life-cycle GHG emission per kilometre of urban rail transit systems is 11.69 × 10 4 tCO 2 e (with a service life of 50 years) in China. The construction phase and operation phase generated about 18.73 and 81.27% of this emission, respectively. The preliminary conclusions of this study may help shed light on the emission reduction potential of urban rail transit systems and the emission reduction targets in China.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135824309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study purposes to determine which types of waste are influenced and reduced by the Lean principles and BIM functions that occur during the construction phase. A survey study was conducted and analyzed with multiple correspondence analysis. It is seen that the waiting, overprocessing and overproduction wastes are reduced by lean principles. It has been determined that visualization features of Lean principles and BIM functions reduce inventory and defect production waste. It has been figured out that BIM functions reduce unnecessary transportation waste by using technologies. It is thought that contribute to construction managers can quickly determine which Lean principles and/or BIM functions will be used at the construction site to reduce waste more effectively.
{"title":"Investigation of influence on construction waste of the Lean-BIM interaction in construction phase using multiple correspondence analysis","authors":"Ibrahim Karatas, Abdulkadir Budak","doi":"10.1680/jensu.22.10018","DOIUrl":"https://doi.org/10.1680/jensu.22.10018","url":null,"abstract":"This study purposes to determine which types of waste are influenced and reduced by the Lean principles and BIM functions that occur during the construction phase. A survey study was conducted and analyzed with multiple correspondence analysis. It is seen that the waiting, overprocessing and overproduction wastes are reduced by lean principles. It has been determined that visualization features of Lean principles and BIM functions reduce inventory and defect production waste. It has been figured out that BIM functions reduce unnecessary transportation waste by using technologies. It is thought that contribute to construction managers can quickly determine which Lean principles and/or BIM functions will be used at the construction site to reduce waste more effectively.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":"1131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136113280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Modular construction (MC) is an innovative approach to enhancing productivity and sustainability, but its complex and dynamic supply chain is challenging. This paper develops and validates a dialectical system framework for understanding and enhancing the MC supply chain, through the combination of a literature review, interviews with 59 professionals and a case study of modular integrated construction development in Hong Kong, China. The developed framework encompasses seven key components of the MC supply chain technical system – namely, pre-approval, building plan pre-submission, detailed design, module production, logistics, module installation, and quality assurance and quality control – considering various stakeholders embedded in broader contexts. The case study validates the framework as a theoretical lens to comprehend the complex MC supply chain and as a novel analytical model to enhance the MC supply chain from different stakeholder and contextual perspectives. Future research directions are suggested regarding strategy establishment, performance measurement and policy road map development to achieve a mature and sustainable supply chain.
{"title":"A dialectical system framework for enhancing the modular construction supply chain","authors":"Wei Pan, Mi Pan, Yi Yang","doi":"10.1680/jensu.23.00039","DOIUrl":"https://doi.org/10.1680/jensu.23.00039","url":null,"abstract":"Modular construction (MC) is an innovative approach to enhancing productivity and sustainability, but its complex and dynamic supply chain is challenging. This paper develops and validates a dialectical system framework for understanding and enhancing the MC supply chain, through the combination of a literature review, interviews with 59 professionals and a case study of modular integrated construction development in Hong Kong, China. The developed framework encompasses seven key components of the MC supply chain technical system – namely, pre-approval, building plan pre-submission, detailed design, module production, logistics, module installation, and quality assurance and quality control – considering various stakeholders embedded in broader contexts. The case study validates the framework as a theoretical lens to comprehend the complex MC supply chain and as a novel analytical model to enhance the MC supply chain from different stakeholder and contextual perspectives. Future research directions are suggested regarding strategy establishment, performance measurement and policy road map development to achieve a mature and sustainable supply chain.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134948213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Construction industry contributes the highest CO 2 emissions, in which concrete production is one of the key components. Extracting and transporting raw materials like limestone and aggregates contribute to habitat destruction and pollution. This study deals with the relative assessment of a group of commonly used concretes in varied strength levels using emergy analysis and Life Cycle Assessment (LCA). Six types of concrete are considered for evaluation: normal, binary blended, ternary blended, quaternary blended, alkali activated, and recycled aggregate concrete (RAC). Emergy analysis considers different qualities and quantities of inputs, providing insights on the resource-based impacts through emergy indicators. LCA, conducted using SimaPro software, evaluates the environmental impacts of concrete production using midpoint and endpoint indicators. From emergy analysis it is inferred that of concrete with alternative materials like fly ash, silica fume, GGBS, and recycled aggregate exhibited better results in terms of emergy indicators. RAC showed the highest value of emergy sustainability index in all strength ranges. In LCA, impacts were seen higher for normal concrete, followed by RAC. To obtain a more inclusive result, an emergy-LCA integrated index (IELI) is proposed. Results from this index aids in improved decision-making regarding the sustainability of the system considered.
{"title":"Sustainability of alternative concretes – emergy and life cycle analysis","authors":"Kavya A Nair, K B Anand","doi":"10.1680/jensu.23.00044","DOIUrl":"https://doi.org/10.1680/jensu.23.00044","url":null,"abstract":"Construction industry contributes the highest CO 2 emissions, in which concrete production is one of the key components. Extracting and transporting raw materials like limestone and aggregates contribute to habitat destruction and pollution. This study deals with the relative assessment of a group of commonly used concretes in varied strength levels using emergy analysis and Life Cycle Assessment (LCA). Six types of concrete are considered for evaluation: normal, binary blended, ternary blended, quaternary blended, alkali activated, and recycled aggregate concrete (RAC). Emergy analysis considers different qualities and quantities of inputs, providing insights on the resource-based impacts through emergy indicators. LCA, conducted using SimaPro software, evaluates the environmental impacts of concrete production using midpoint and endpoint indicators. From emergy analysis it is inferred that of concrete with alternative materials like fly ash, silica fume, GGBS, and recycled aggregate exhibited better results in terms of emergy indicators. RAC showed the highest value of emergy sustainability index in all strength ranges. In LCA, impacts were seen higher for normal concrete, followed by RAC. To obtain a more inclusive result, an emergy-LCA integrated index (IELI) is proposed. Results from this index aids in improved decision-making regarding the sustainability of the system considered.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136136707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Iman Farzin, A. Mamdoohi, Mohammadhossein Abbasi, Amirhossein Baghestani, Francesco Ciari
Due to the potential of Automated Vehicles (AVs) to radically change the transportation system, it is essential to investigate the factors affecting users’ intention to use. Although previous studies have mostly focused on internal schema of beliefs in latent variables, this paper aims to examine the impact of internal and external factors by integrating variables of Unified Theory of Acceptance and Use of Technology (UTAUT) along with environmental concern and perceived risk. Moreover, the effect of latent variables is also compared for different trip purposes (mandatory and optional) that received less attention in previous studies. Using stated preference survey, 641 valid responses from Tehran citizens have been collected. Estimation results of Structural Equation Modelling show a significant difference between the determinants of AVs acceptance across mandatory and optional trips. Estimated coefficients indicate that social influence and performance expectancy are the strongest explanatory factors in intention to use AVs on optional and mandatory trips, respectively. However, no significant difference is observed for the impact of environmental concern on intention to use AVs across both trip types.
{"title":"Determinants behind the acceptance of autonomous vehicles in mandatory and optional trips","authors":"Iman Farzin, A. Mamdoohi, Mohammadhossein Abbasi, Amirhossein Baghestani, Francesco Ciari","doi":"10.1680/jensu.23.00023","DOIUrl":"https://doi.org/10.1680/jensu.23.00023","url":null,"abstract":"Due to the potential of Automated Vehicles (AVs) to radically change the transportation system, it is essential to investigate the factors affecting users’ intention to use. Although previous studies have mostly focused on internal schema of beliefs in latent variables, this paper aims to examine the impact of internal and external factors by integrating variables of Unified Theory of Acceptance and Use of Technology (UTAUT) along with environmental concern and perceived risk. Moreover, the effect of latent variables is also compared for different trip purposes (mandatory and optional) that received less attention in previous studies. Using stated preference survey, 641 valid responses from Tehran citizens have been collected. Estimation results of Structural Equation Modelling show a significant difference between the determinants of AVs acceptance across mandatory and optional trips. Estimated coefficients indicate that social influence and performance expectancy are the strongest explanatory factors in intention to use AVs on optional and mandatory trips, respectively. However, no significant difference is observed for the impact of environmental concern on intention to use AVs across both trip types.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":"9 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73264569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The traditional way of designing parameters of university buildings is to give designs based on the experience of designers after surveying the local environment, but this approach is time-consuming and laborious. The research problem of this paper is to quickly optimize the parameters of university buildings with the goal of energy saving. This paper first constructed a model of energy consumption and lighting of university buildings, then used a particle swarm optimization (PSO) algorithm modified by the genetic algorithm to optimize the building parameters, and compared it with the traditional PSO algorithm in a case study. The results were that the PSO algorithm improved by the genetic algorithm converged the building parameter scheme to stability faster, and the scheme fitness value at stability was lower than that of the traditional PSO algorithm, and the improved PSO algorithm required less computation time in optimizing the building parameter scheme.
{"title":"Lighting design of university buildings based on green energy-saving","authors":"Wei Dong, Shanchuan Pan, Dao Zhou","doi":"10.1680/jensu.23.00022","DOIUrl":"https://doi.org/10.1680/jensu.23.00022","url":null,"abstract":"The traditional way of designing parameters of university buildings is to give designs based on the experience of designers after surveying the local environment, but this approach is time-consuming and laborious. The research problem of this paper is to quickly optimize the parameters of university buildings with the goal of energy saving. This paper first constructed a model of energy consumption and lighting of university buildings, then used a particle swarm optimization (PSO) algorithm modified by the genetic algorithm to optimize the building parameters, and compared it with the traditional PSO algorithm in a case study. The results were that the PSO algorithm improved by the genetic algorithm converged the building parameter scheme to stability faster, and the scheme fitness value at stability was lower than that of the traditional PSO algorithm, and the improved PSO algorithm required less computation time in optimizing the building parameter scheme.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":"118 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75097389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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