Pub Date : 2024-04-01DOI: 10.28991/esj-2024-08-02-019
Qi Zhi Lim, C. Lee, K. Lim, Jing Xiang Ng, Eric Khang Heng Ooi, Nicole Kai Ning Loh
In natural language processing (NLP), a Question Answering System (QAS) refers to a system or model that is designed to understand and respond to user queries in natural language. As we navigate through the recent advancements in QAS, it can be observed that there is a paradigm shift of the methods used from traditional machine learning and deep learning approaches towards transformer-based language models. While significant progress has been made, the utilization of these models for historical QAS and the development of QAS for Malay language remain largely unexplored. This research aims to bridge the gaps, focusing on developing a Multilingual QAS for history of Malaysia by utilizing a transformer-based language model. The system development process encompasses various stages, including data collection, knowledge representation, data loading and pre-processing, document indexing and storing, and the establishment of a querying pipeline with the retriever and reader. A dataset with a collection of 100 articles, including web blogs related to the history of Malaysia, has been constructed, serving as the knowledge base for the proposed QAS. A significant aspect of this research is the use of the translated dataset in English instead of the raw dataset in Malay. This decision was made to leverage the effectiveness of well-established retriever and reader models that were trained on English data. Moreover, an evaluation dataset comprising 100 question-answer pairs has been created to evaluate the performance of the models. A comparative analysis of six different transformer-based language models, namely DeBERTaV3, BERT, ALBERT, ELECTRA, MiniLM, and RoBERTa, has been conducted, where the effectiveness of the models was examined through a series of experiments to determine the best reader model for the proposed QAS. The experimental results reveal that the proposed QAS achieved the best performance when employing RoBERTa as the reader model. Finally, the proposed QAS was deployed on Discord and equipped with multilingual support through the incorporation of language detection and translation modules, enabling it to handle queries in both Malay and English. Doi: 10.28991/ESJ-2024-08-02-019 Full Text: PDF
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Pub Date : 2024-04-01DOI: 10.28991/esj-2024-08-02-011
Khanittha Jitsaeng, Wirapong Chansanam, Suparp Kanyacome, Umawadee Detthamrong, Chunqiu Li
This study delves into the complex landscape of social media utilization among undergraduate students in higher education institutions in Thailand, investigating the pivotal factors that shape their engagement with these platforms. Employing a quantitative research approach, the investigation utilizes a meticulously crafted multi-stage sampling methodology coupled with a robust data collection process. Through applying multi-correlation and multiple-regression analyses, the research unveils significant insights into the determinants of social media usage among Thai youth. Notably, motivation for social media use, access, creativity, and participation through these platforms emerge as substantive predictors. This aligns seamlessly with existing research, underscoring the critical roles played by motivation and accessibility in influencing online engagement. The resultant predictive equation is a pragmatic instrument for comprehending and forecasting social media engagement patterns among Thai undergraduate students. The findings underscore the importance of motivation, access, and creativity as driving forces behind social media utilization. This research equips educators, policymakers, and researchers with valuable insights, emphasizing the imperative of fostering responsible and effective use of social media within this demographic. The study's contribution to the academic landscape is noteworthy because it sheds light on unexplored facets such as cultural dynamics, peer networks, and individual traits, enriching our understanding of the intricate social media landscape among Thai undergraduate students. Doi: 10.28991/ESJ-2024-08-02-011 Full Text: PDF
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Pub Date : 2024-04-01DOI: 10.28991/esj-2024-08-02-03
Tuo Wang, Shiqing Chen, C. Kongruang
As the times and the world are changing in an unprecedented way, public security issues have become increasingly linked, transnational, and diverse, causing huge impacts on the global economy and society, as well as posing great challenges to the government in dealing with public crisis decision-making. This study aims to determine the factors affecting the government's crisis decision-making and analyze the interrelationship among the factors affecting the government's crisis decision-making and the performance of its crisis decision-making. The questionnaire was developed and used to collect data from 400 samples of various groups, including government department personnel, scientific research institute practitioners, university lecturers, the public, and university students, both online and face-to-face. The structural equation model (SEM) is used to evaluate the structural relationships of the relevant variables, including the crisis decision-making body, crisis decision-making procedure, crisis decision-making performance, the decision environment, and value identification. It is found that the diversified decision-making subject and decision-making environment have a positive and significant impact on the public crisis decision-making process, value identification, and decision-making performance, respectively. This study has contributed to the following issues. Firstly, it developed new measurement tools and indicators for better evaluating the quality and effect of public crisis decision-making and exploring the influence of different factors on the crisis decision-making of the government. Secondly, it employed cross-industry and cross-cultural comparative research to find commonalities and differences and provide targeted recommendations. Doi: 10.28991/ESJ-2024-08-02-03 Full Text: PDF
随着时代和世界发生着前所未有的变化，公共安全问题的关联性、跨国性和多样性日益增强，给全球经济和社会带来了巨大影响，也给政府应对公共危机决策带来了巨大挑战。本研究旨在确定影响政府危机决策的因素，并分析影响政府危机决策的因素与其危机决策绩效之间的相互关系。本研究编制了调查问卷，并通过网络和面对面的方式，对政府部门人员、科研机构从业人员、高校讲师、社会公众、大学生等不同群体的 400 个样本进行了数据采集。采用结构方程模型（SEM）评价危机决策主体、危机决策程序、危机决策绩效、决策环境、价值认同等相关变量的结构关系。研究发现，决策主体多元化和决策环境分别对公共危机决策程序、价值识别和决策绩效产生了积极而显著的影响。本研究在以下问题上做出了贡献。首先，为更好地评价公共危机决策的质量和效果，探索不同因素对政府危机决策的影响，开发了新的测量工具和指标。其次，通过跨行业、跨文化的比较研究，发现共性与差异，提出有针对性的建议。Doi: 10.28991/ESJ-2024-08-02-03 Full Text：PDF
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Pub Date : 2024-04-01DOI: 10.28991/esj-2024-08-02-023
Dang Anh Tuan
Felt accountability affects an account-givers’ behavior, decisions, and organizational performance. Accounting information (AI) is provided for decision-making and accountability in the public sector. This study investigated the effects of felt accountability on expertise, legitimacy, and AI disclosure level for accountability on users’ satisfaction. Survey data included 401 responses across public institutions in Vietnam, and SEM linear structure analysis was used to examine the results. The research findings indicate that felt accountability directly affects users’ satisfaction and their expertise and legitimacy, and the level of AI disclosure. The expertise and legitimacy of the account-holder and the level of AI disclosure partially mediate the relationship between felt accountability and users’ satisfaction. This implies that AI's needs, purposes, and importance are determined based on hypothetical users that are not useful in reality. In practice, AI must meet accountability requirements to bring satisfaction to users. The satisfaction level of actual users of AI is influenced by the account-givers’ perceived accountability regarding the needs, expertise, and legitimacy of the account-holder. Therefore, it is essential to identify the type of information needed, the timing of AI disclosure, and the actual AI users to reduce the gap between the supply and demand of AI. The research results provide evidence supporting agency and social contingency theories in accountability relationships. Doi: 10.28991/ESJ-2024-08-02-023 Full Text: PDF
责任感会影响会计人员的行为、决策和组织绩效。会计信息（AI）用于公共部门的决策和问责。本研究调查了感受到的责任感对专业知识、合法性和会计信息披露水平对用户满意度的影响。调查数据包括越南公共机构的 401 份答复，并采用 SEM 线性结构分析法对结果进行检验。研究结果表明，感觉到的责任感直接影响用户的满意度、用户的专业知识和合法性以及人工智能披露水平。账户持有人的专业知识和合法性以及人工智能披露水平部分地调节了感受到的责任感与用户满意度之间的关系。这意味着，人工智能的需求、目的和重要性是根据假设的用户来确定的，在现实中并无用处。在实践中，人工智能必须满足问责要求，才能给用户带来满意度。人工智能实际用户的满意度受开户绑定手机领体验金提供者对开户绑定手机领体验金需求、专业知识和合法性的责任感影响。因此，必须确定所需信息的类型、人工智能披露的时机以及人工智能的实际用户，以缩小人工智能供需之间的差距。研究结果为责任关系中的代理理论和社会权变理论提供了支持证据。Doi: 10.28991/ESJ-2024-08-02-023 全文：PDF
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Pub Date : 2024-04-01DOI: 10.28991/esj-2024-08-02-017
Thuc Duc Tran, Thong Van Pham
Despite a significant amount of research on decision-making, academics find it difficult to explain the decision-making process. The purpose of this paper is to examine the relationship between emotional intelligence, thinking ability, and decision-making, as well as develop measurement instruments for thinking ability to better model decision-making. By following a deductive research approach associated with positivist philosophy, a cross-sectional study was conducted and surveyed 547 respondents in South Vietnam via email sent randomly by Google Forms using a convenience sampling method. To avoid common method bias, the reliability and validity of all items were assessed by Cronbach’s alpha and using the SPSS program. Then, to assess the structural model and test hypotheses, partial least squares structural equation modeling was applied using the SmartPLS program. The findings not only have proven the significantly positive effects of emotional intelligence and thinking ability on decision-making but also highlight the suitability of the measurement instruments related to thinking ability in explaining decision-making that no research has ever built before. Based on the findings, this research opens up a novel research approach to decision-making and provides the foundation for policymakers and managers to improve decision-making efficiency and human resource quality. Doi: 10.28991/ESJ-2024-08-02-017 Full Text: PDF
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Pub Date : 2024-04-01DOI: 10.28991/esj-2024-08-02-06
David A. Procházka, Kateřina Bočková
The essentials of the presented paper are the psychological well-being and life satisfaction of early-career project managers (maximum 18 months of experience in project management). The primary goal is to determine whether there is a relationship between the psychological well-being and life satisfaction of early-career project managers, and if relationships exist between these variables, to determine their strength. In the theoretical part of the paper, processed using the analysis of relevant information sources, we deal with the concepts of well-being and life satisfaction. As part of the research description, we define an early carrier project manager and describe a sample of respondents consisting of 88 early carrier project managers. To analyze the well-being and life satisfaction variables, we use the Psychological Well-Being Scale questionnaire and the Life Satisfaction Scale questionnaire, where the results of these questionnaires are subsequently subjected to descriptive statistical analysis. We found that there is a moderately strong and statistically significant relationship between the psychological well-being and life satisfaction of early-career project managers. The results of the research can serve as a basis for developing suitable adaptation programs for early carrier project managers, where HR professionals can devote their attention to improving the well-being of early carrier project managers and their life satisfaction and thus reduce the risk of burnout syndrome, which is a very common phenomenon not only among early carrier professions but also project managers. The issue of well-being appears to be relatively well researched and described, even in the context of project managers. However, the life satisfaction of project managers has not been analyzed in such detail, and it is no longer possible to find the issue of investigating the mutual correlation of well-being and life satisfaction of early-career project managers. It is our research that can narrow this gap in the theories of project management, human resource management, and work psychology. Doi: 10.28991/ESJ-2024-08-02-06 Full Text: PDF
本文的主要内容是早期职业项目经理（最多 18 个月的项目管理经验）的心理健康和生活满意度。主要目标是确定早期职业项目经理的心理健康和生活满意度之间是否存在关系，如果这些变量之间存在关系，则确定其强度。在本文的理论部分，我们利用对相关信息来源的分析，讨论了幸福感和生活满意度的概念。作为研究描述的一部分，我们定义了早期运营商项目经理，并描述了由 88 位早期运营商项目经理组成的受访者样本。为了分析幸福感和生活满意度变量，我们使用了心理幸福感量表问卷和生活满意度量表问卷，随后对这些问卷的结果进行了描述性统计分析。我们发现，初入职场的项目经理的心理幸福感和生活满意度之间存在中等强度的关系，且在统计学上有显著意义。研究结果可以作为为早期职业经理人制定合适的适应方案的依据，人力资源专业人员可以将注意力放在提高早期职业经理人的幸福感和生活满意度上，从而降低职业倦怠综合征的风险，这种现象不仅在早期职业经理人中非常普遍，在项目经理中也是如此。对幸福感问题的研究和描述似乎相对较多，即使在项目经理方面也是如此。然而，项目经理的生活满意度却没有得到如此详细的分析，也就不再可能找到研究早期职业项目经理的幸福感与生活满意度相互关联的问题。正是我们的研究可以缩小项目管理、人力资源管理和工作心理学理论上的这一差距。Doi: 10.28991/ESJ-2024-08-02-06 Full Text：PDF
{"title":"Early Career Project Managers: Well-being and Life Satisfaction Analysis","authors":"David A. Procházka, Kateřina Bočková","doi":"10.28991/esj-2024-08-02-06","DOIUrl":"https://doi.org/10.28991/esj-2024-08-02-06","url":null,"abstract":"The essentials of the presented paper are the psychological well-being and life satisfaction of early-career project managers (maximum 18 months of experience in project management). The primary goal is to determine whether there is a relationship between the psychological well-being and life satisfaction of early-career project managers, and if relationships exist between these variables, to determine their strength. In the theoretical part of the paper, processed using the analysis of relevant information sources, we deal with the concepts of well-being and life satisfaction. As part of the research description, we define an early carrier project manager and describe a sample of respondents consisting of 88 early carrier project managers. To analyze the well-being and life satisfaction variables, we use the Psychological Well-Being Scale questionnaire and the Life Satisfaction Scale questionnaire, where the results of these questionnaires are subsequently subjected to descriptive statistical analysis. We found that there is a moderately strong and statistically significant relationship between the psychological well-being and life satisfaction of early-career project managers. The results of the research can serve as a basis for developing suitable adaptation programs for early carrier project managers, where HR professionals can devote their attention to improving the well-being of early carrier project managers and their life satisfaction and thus reduce the risk of burnout syndrome, which is a very common phenomenon not only among early carrier professions but also project managers. The issue of well-being appears to be relatively well researched and described, even in the context of project managers. However, the life satisfaction of project managers has not been analyzed in such detail, and it is no longer possible to find the issue of investigating the mutual correlation of well-being and life satisfaction of early-career project managers. It is our research that can narrow this gap in the theories of project management, human resource management, and work psychology. Doi: 10.28991/ESJ-2024-08-02-06 Full Text: PDF","PeriodicalId":11586,"journal":{"name":"Emerging Science Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140789440","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}
The concept of project success has evolved from the perspective of conforming to the project triangle to that of benefiting the environment, and then from the perspective of the following generation. Scientists increasingly assert that successful projects require a set of criteria that include such item(s) as future potential. The meaning of project success varies depending on where it is executed. The purpose of this study is to identify whether projects with future potential have a certain effect on indicators of the Global Competitiveness Index (GCI) of the Republic of Kazakhstan (RK) and what other success criteria are inherent in such projects. By using the method of descriptive analysis of data collected from 107 experts and analyzing 19 influential projects, the study revealed that projects oriented towards the future have a significant impact on the indicators of the GCI in the RK. This finding confirms the necessity of considering the long-term sustainability and social significance of projects when assessing their successes. Additionally, a specific combination of success criteria that contributes most to this impact was identified. This research provides a brand-new understanding of project success criteria in the context of their impact on the GCI and emphasizes the importance of considering future potential in project planning and evaluation. Doi: 10.28991/ESJ-2024-08-02-012 Full Text: PDF
{"title":"Impact of Projects with Future Potential on the Global Competitiveness Index of Countries","authors":"Akbota Akzambekkyzy, Laszlo Vasa, Jeffrey Yi-Lin Forrest, Shynara Sarkambayeva, Satyanand Singh","doi":"10.28991/esj-2024-08-02-012","DOIUrl":"https://doi.org/10.28991/esj-2024-08-02-012","url":null,"abstract":"The concept of project success has evolved from the perspective of conforming to the project triangle to that of benefiting the environment, and then from the perspective of the following generation. Scientists increasingly assert that successful projects require a set of criteria that include such item(s) as future potential. The meaning of project success varies depending on where it is executed. The purpose of this study is to identify whether projects with future potential have a certain effect on indicators of the Global Competitiveness Index (GCI) of the Republic of Kazakhstan (RK) and what other success criteria are inherent in such projects. By using the method of descriptive analysis of data collected from 107 experts and analyzing 19 influential projects, the study revealed that projects oriented towards the future have a significant impact on the indicators of the GCI in the RK. This finding confirms the necessity of considering the long-term sustainability and social significance of projects when assessing their successes. Additionally, a specific combination of success criteria that contributes most to this impact was identified. This research provides a brand-new understanding of project success criteria in the context of their impact on the GCI and emphasizes the importance of considering future potential in project planning and evaluation. Doi: 10.28991/ESJ-2024-08-02-012 Full Text: PDF","PeriodicalId":11586,"journal":{"name":"Emerging Science Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140766761","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 : 2024-04-01DOI: 10.28991/esj-2024-08-02-018
M. Makaleng
Reverse logistics has received a lot of attention due to the negative impact it has on the environment and the growing demand for green products. This especially occurred in the fast-moving consumer goods retail sector due to recalls and waste management. This sector significantly contributes to the gross domestic product growth of all countries. This has therefore led to the growing significance of reverse logistics since the fast-moving consumer goods retail sector cannot avoid reverse logistics. The primary objective of this study was for fast-moving consumer goods retailers to prioritize critical success factors for reverse logistics as a source of competitive advantage in the fast-moving consumer goods retailers’ sector. This is because it is essential for the fast-moving consumer goods retail sector to implement critical success factors in reverse logistics that can lead to firm competitiveness. The study employed a positivist research philosophy, where data were collected from 418 fast-moving consumer goods retailers and consumers via SurveyMonkey using two close-ended questionnaires. The Statistical Package for the Social Sciences and the Analysis of Moment Structures software version 27 were employed to analyze the data. The results offer insight into the critical success factors in reverse logistics that should be carried out to achieve firm competitiveness. Through the implementation of critical success factors, this sector will achieve several goals, such as meeting environmental protocols, decreasing operational costs, cultivating the cumulative value of the brand, and improving customer satisfaction. Doi: 10.28991/ESJ-2024-08-02-018 Full Text: PDF
{"title":"Prioritizing Critical Success Factors for Reverse Logistics as a Source of Competitive Advantage","authors":"M. Makaleng","doi":"10.28991/esj-2024-08-02-018","DOIUrl":"https://doi.org/10.28991/esj-2024-08-02-018","url":null,"abstract":"Reverse logistics has received a lot of attention due to the negative impact it has on the environment and the growing demand for green products. This especially occurred in the fast-moving consumer goods retail sector due to recalls and waste management. This sector significantly contributes to the gross domestic product growth of all countries. This has therefore led to the growing significance of reverse logistics since the fast-moving consumer goods retail sector cannot avoid reverse logistics. The primary objective of this study was for fast-moving consumer goods retailers to prioritize critical success factors for reverse logistics as a source of competitive advantage in the fast-moving consumer goods retailers’ sector. This is because it is essential for the fast-moving consumer goods retail sector to implement critical success factors in reverse logistics that can lead to firm competitiveness. The study employed a positivist research philosophy, where data were collected from 418 fast-moving consumer goods retailers and consumers via SurveyMonkey using two close-ended questionnaires. The Statistical Package for the Social Sciences and the Analysis of Moment Structures software version 27 were employed to analyze the data. The results offer insight into the critical success factors in reverse logistics that should be carried out to achieve firm competitiveness. Through the implementation of critical success factors, this sector will achieve several goals, such as meeting environmental protocols, decreasing operational costs, cultivating the cumulative value of the brand, and improving customer satisfaction. Doi: 10.28991/ESJ-2024-08-02-018 Full Text: PDF","PeriodicalId":11586,"journal":{"name":"Emerging Science Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140758104","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 : 2024-04-01DOI: 10.28991/esj-2024-08-02-021
A. Savitsky, M. Radkevich, A. Salokhiddinov, O. Ashirova, T. Khankelov, K. Shipilova, M. Abdukadirova, A. Gapirov, R. Razzakov
The problem of an approximate solution to hydrodynamic problems is the consideration of pressure. To exclude it from the equations, the transition to “non-primitive variables” (vortex and velocity vector divergence) is made. In this case, there are difficulties in the algorithmization of new equations for solving the inverse problem of hydrodynamics and a lot of internal iterative calculations. The object of this study includes equations in “non-primitive” variables. The research methods are based on the transformation without simplifications and assumptions of hydrodynamic equations into a form containing “non-primitive” variables and the demonstration of the possibilities of solving the equations. The GAMS programming language was used for approximate solutions for the first time. The aim of this paper is to demonstrate the possibility of solving the full equations in “non-primitive” variables for various conditions. The results showed the possibility of considering the compressibility of the medium when solving the inverse problem of hydrodynamics; the identity of solutions of the proposed system of equations and equations using the potential; and the possibility of using optimizing programming languages for hydrodynamics problems. The scientific novelty of this research consists of solving the full equations of hydrodynamics with the use of “non-primitive” variables but without the use of the current function. Doi: 10.28991/ESJ-2024-08-02-021 Full Text: PDF
{"title":"A New Approach to the Use of Non-Primitive Variables in the Mechanics of Continuous Media","authors":"A. Savitsky, M. Radkevich, A. Salokhiddinov, O. Ashirova, T. Khankelov, K. Shipilova, M. Abdukadirova, A. Gapirov, R. Razzakov","doi":"10.28991/esj-2024-08-02-021","DOIUrl":"https://doi.org/10.28991/esj-2024-08-02-021","url":null,"abstract":"The problem of an approximate solution to hydrodynamic problems is the consideration of pressure. To exclude it from the equations, the transition to “non-primitive variables” (vortex and velocity vector divergence) is made. In this case, there are difficulties in the algorithmization of new equations for solving the inverse problem of hydrodynamics and a lot of internal iterative calculations. The object of this study includes equations in “non-primitive” variables. The research methods are based on the transformation without simplifications and assumptions of hydrodynamic equations into a form containing “non-primitive” variables and the demonstration of the possibilities of solving the equations. The GAMS programming language was used for approximate solutions for the first time. The aim of this paper is to demonstrate the possibility of solving the full equations in “non-primitive” variables for various conditions. The results showed the possibility of considering the compressibility of the medium when solving the inverse problem of hydrodynamics; the identity of solutions of the proposed system of equations and equations using the potential; and the possibility of using optimizing programming languages for hydrodynamics problems. The scientific novelty of this research consists of solving the full equations of hydrodynamics with the use of “non-primitive” variables but without the use of the current function. Doi: 10.28991/ESJ-2024-08-02-021 Full Text: PDF","PeriodicalId":11586,"journal":{"name":"Emerging Science Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140788566","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 : 2024-04-01DOI: 10.28991/esj-2024-08-02-04
.. Rasgianti, R. Adiputra, A. D. Nugraha, R. Sitanggang, Wahyu W. Pandoe, .. Aprijanto, Takeshi Yasunaga, Muhammad A. Santosa
Ocean Thermal Energy Conversion (OTEC) is a technology to harvest the solar energy stored in the ocean by utilizing the temperature difference between warm surface and cold deep seawater. Considering that the OTEC system works in a low-temperature range, the present paper assessed the technical resources comprehensively by acquiring in-situ thermocline data and conducting a sensitivity analysis of the system parameters. The in-situ temperature profile data were measured in the waters of North Bali, Indonesia. The temperature gradient data based on field measurements were then compared with the HYCOM consortium model. The data were then used as input in the OTEC power and efficiency estimation through a single-stage ranking cycle. The analysis was conducted by varying the type of working fluid, the performance of the heat exchanger, and the location to investigate how the system parameters influenced the power produced. Using an unusual combination of parameters made it difficult to analyze the resulting data multiple times. However, with reference-based analysis and the formulation of calculations, the sensitivity of each parameter could be assessed at both locations. As a result, the ammonia working fluid provided the highest net power output of the system but had the lowest efficiency of all working fluids. The heat exchanger performance in terms of net power and efficiency cannot be separated from the seawater mass flow requirement. This referred to the results where the heat exchanger with a temperature difference of 3°C before and after the seawater passed through the heat exchanger and produced the highest net power and efficiency. Additionally, the net power output reached its convergence level at a water depth of 400m for the Bungkulan site and 450m for Celukan Bawang, which was proportional to the thermocline tendency. Doi: 10.28991/ESJ-2024-08-02-04 Full Text: PDF
海洋热能转换（OTEC）是一种利用温暖的表层海水和寒冷的深层海水之间的温差来获取海洋中储存的太阳能的技术。考虑到 OTEC 系统在低温范围内工作，本文通过获取原位温跃层数据并对系统参数进行敏感性分析，对技术资源进行了全面评估。现场温度曲线数据是在印度尼西亚北巴厘岛水域测量的。然后将基于实地测量的温度梯度数据与 HYCOM 联合模型进行了比较。然后，通过单级排序循环，将数据作为 OTEC 功率和效率估算的输入。通过改变工作流体的类型、热交换器的性能和位置来进行分析，以研究系统参数如何影响发电量。由于使用了不同寻常的参数组合，因此很难对所得数据进行多次分析。不过，通过基于参考的分析和计算公式，可以对两个地点的每个参数的敏感性进行评估。结果，氨工作流体提供了系统中最高的净功率输出，但在所有工作流体中效率最低。热交换器在净功率和效率方面的性能与海水质量流量要求是分不开的。海水通过热交换器前后温差为 3°C 的热交换器产生的净功率和效率最高。此外，Bungkulan 站点的净功率输出在水深 400 米和 Celukan Bawang 站点的水深 450 米处达到收敛水平，这与温跃层趋势成正比。Doi: 10.28991/ESJ-2024-08-02-04 全文：PDF
{"title":"System Parameters Sensitivity Analysis of Ocean Thermal Energy Conversion","authors":".. Rasgianti, R. Adiputra, A. D. Nugraha, R. Sitanggang, Wahyu W. Pandoe, .. Aprijanto, Takeshi Yasunaga, Muhammad A. Santosa","doi":"10.28991/esj-2024-08-02-04","DOIUrl":"https://doi.org/10.28991/esj-2024-08-02-04","url":null,"abstract":"Ocean Thermal Energy Conversion (OTEC) is a technology to harvest the solar energy stored in the ocean by utilizing the temperature difference between warm surface and cold deep seawater. Considering that the OTEC system works in a low-temperature range, the present paper assessed the technical resources comprehensively by acquiring in-situ thermocline data and conducting a sensitivity analysis of the system parameters. The in-situ temperature profile data were measured in the waters of North Bali, Indonesia. The temperature gradient data based on field measurements were then compared with the HYCOM consortium model. The data were then used as input in the OTEC power and efficiency estimation through a single-stage ranking cycle. The analysis was conducted by varying the type of working fluid, the performance of the heat exchanger, and the location to investigate how the system parameters influenced the power produced. Using an unusual combination of parameters made it difficult to analyze the resulting data multiple times. However, with reference-based analysis and the formulation of calculations, the sensitivity of each parameter could be assessed at both locations. As a result, the ammonia working fluid provided the highest net power output of the system but had the lowest efficiency of all working fluids. The heat exchanger performance in terms of net power and efficiency cannot be separated from the seawater mass flow requirement. This referred to the results where the heat exchanger with a temperature difference of 3°C before and after the seawater passed through the heat exchanger and produced the highest net power and efficiency. Additionally, the net power output reached its convergence level at a water depth of 400m for the Bungkulan site and 450m for Celukan Bawang, which was proportional to the thermocline tendency. Doi: 10.28991/ESJ-2024-08-02-04 Full Text: PDF","PeriodicalId":11586,"journal":{"name":"Emerging Science Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140784474","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}
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