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Analysis of the Groundwater Table of Theis's Formula Through the Analytical and Numerical Methods Combination for Time-Lapse Microgravity Modeling

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SSRN 2024年

作者： Lestari, Mutia Dyah Dahrin, Darharta Abdurrahman, Dadi Azhari, Naila Yuni Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Jalan Ganesa 10 Bandung40132 Indonesia Geophysical Engineering Study Program Institut Teknologi Sumatera Jalan Terusan Ryacudu Desa Way Hui Lampung Selatan Kecamatan Jatiagung 35365 Indonesia

Massive and continuous well pumping can result in significant groundwater table decline, potentially leading to groundwater depletion and land subsidence over the long term. The timelapse microgravity method, an innovation in gravity measurement techniques, is currently widely used in hydrological applications, including groundwater table monitoring. Groundwater pumping induces changes in subsurface mass distribution, resulting in subsurface mass anomalies that can be detected using gravity method. Many previous studies have employed the slab Bouguer approach to estimate gravity anomalies due to groundwater table changes. This method has significant error for detail anomaly value of groundwater table, which is high decline near production wells. According to Theis formula, the groundwater table decline model as drawdown cone (inverted cone), which gravitational field is calculated. Therefore, calculated gravity anomaly must account for the drawdown cone shape. In this study, gravity anomaly calculations for groundwater drawdown cones are resolved by integrating triple integrals using cylindrical coordinates both analytical and numerical methods. The analytical calculation of integrating triple integrals can only be resolved for two variables (variable z and [[EQUATION]]), and for [[EQUATION]] variable is calculated using numerical methods with the trapezoidal rule. By making the trapezoidal step smaller for closer the well, it is expected this calculation has smaller errors. This study aims to provide more accurate gravity anomaly calculations in accordance with the conceptual model of groundwater table changes. This technique can be used to help groundwater management where monitoring wells is insufficient. © 2024, The Authors. All rights reserved.

关键词： Microgravity

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Multidimensional factors of community behavioral responses and implications to landfill closures: A case study in Yogyakarta, Indonesia

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Environmental Advances 2024年 16卷

作者： Suhardono, Sapta Fitria, Laili Suryawan, I Wayan Koko Ulhasanah, Nova Sari, Mega Mutiara Septiariva, Iva Yenis Prayogo, Wisnu Environmental Sciences Study Program Faculty of Mathematics and Natural Sciences Universitas Sebelas Maret Surakarta 57126 Indonesia Department of Environmental Engineering Universitas Tanjungpura Pontianak 78124 Indonesia Department of Environmental Engineering Faculty of Infrastructure Planning Universitas Pertamina Jakarta 12220 Indonesia Department of Natural Resources and Environmental Studies College of Environmental Studies and Oceanography National Dong Hwa University Taiwan Hualien 97401 Taiwan Civil Engineering Study Program Faculty of Engineering Universitas Sebelas Maret Surakarta 57126 Indonesia Department of Building Engineering Education Universitas Negeri Medan Medan Indonesia

This study examines how a community in Yogyakarta, Indonesia reacts to the closing of local landfills. It identifies different groups within the community, such as those primarily concerned with health and aesthetics, those exhibiting proactive behaviors, and those acutely aware of the broader impacts. These groups show varying responses to the closures, from adjusting personal habits to calling for policy changes. The findings suggest a need for policies that are flexible and considerate of the community's diverse priorities and behaviors. In conclusion, landfill closures have complex effects on communities that require a thoughtful analysis. The study shows that personal choices and proactive behaviors are crucial in encouraging community involvement in waste management. However, there's a hesitancy to pay more for such services, indicating a gap in community responsibility and environmental stewardship. The research advocates for sustainable waste management solutions that are aligned with the community's values and behaviors, urging policymakers to design inclusive and sustainable systems for waste management that support the long-term well-being of both the community and the environment. © 2024

关键词： Behavioral responses Community perceptions Indonesia Landfill closures Yogyakarta

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Delivering blended learning for generation Z: When will we be ready?

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AIP Conference Proceedings 2023年第1期2590卷

作者： Andian Ari Anggraeni Febrianto Amri Ristadi Culinary Sciene Study Program Faculty of Engineering Universitas Negeri Yogyakarta Indonesia Mechanical Engineering Study Program Faculty of Engineering Universitas Negeri Yogyakarta Indonesia

Teaching and learning have shifted from synchronous meetings in the classroom and laboratory to virtual synchronous and asynchronous meetings. Teaching and learning can take place anytime and anywhere. The availability of ICT infrastructure is one of the supporting factors for teaching and learning in today's Education 4.0. This article describes the availability of ICT facilities to support blended learning. Accidental sampling was conducted on 56 lecturers of the faculty of engineering, Universitas Negeri Yogyakarta (UNY), who participated in a webinar and filled out polls. The polls revealed that nearly 72% of respondents had subscribed to Internet Service Providers and cellular data packages. Total respondents who own laptops or PCs with Intel Core i3 / AMD Ryzen 3 processor specifications were only 23%, yet a mere 4% still own lower processors specifications. Cloud-based software provided by UNY, such as Microsoft 365, was only used by 46% of respondents. The availability of facilities to support virtual synchronous meetings included headset 96%, Zoom educational license 86%, and interactive application 18%. In contrast, facilities to support asynchronous meetings were owned only by less than 60% of respondents, including condenser or clip-on microphone types, graphic pads, video editing software, screen recording software, and project management software. Facilities to support collaborative asynchronous activities such as Google Workspace were applied by 66% of respondents. The availability of ICT facilities supporting teaching and learning is an indicator of readiness for Education 4.0, and this study shows it needs to be improved.

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Human activities and forest fires in Indonesia: An analysis of the Bromo incident and implications for conservation tourism

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Trees, Forests and People 2024年 15卷

作者： Suhardono, Sapta Fitria, Laili Suryawan, I Wayan Koko Septiariva, Iva Yenis Mulyana, Rachmat Sari, Mega Mutiara Ulhasanah, Nova Prayogo, Wisnu Environmental Sciences Study Program Faculty of Mathematics and Natural Sciences Universitas Sebelas Maret Surakarta 57126 Indonesia Department of Environmental Engineering Universitas Tanjungpura Pontianak 78124 Indonesia Department of Environmental Engineering Faculty of Infrastructure Planning Universitas Pertamina Jakarta 12220 Indonesia Department of Natural Resources and Environmental Studies College of Environmental Studies and Oceanography National Dong Hwa University Hualien 97401 Taiwan Civil Engineering Study Program Faculty of Engineering Universitas Sebelas Maret Surakarta 57126 Indonesia Department of Building Engineering Education Universitas Negeri Medan Medan 20221 Indonesia

This study delves into the Bromo magnitude of the fire incident in Indonesia, a notable tourism destination, uncovering significant gaps in knowledge regarding tourist-induced forest fires. We comprehensively analyze the incident's environmental, economic, social, and tourism impacts. Environmentally, the fire caused severe damage to the region's ecosystems, upsetting ecological balances and diminishing air quality. This has far-reaching effects on flora, fauna, and the sustainability of natural resources. Forest fires release a significant amount of pollutants into the air, including carbon dioxide, carbon monoxide, particulate matter, and other harmful compounds. These pollutants can significantly degrade air quality, leading to health issues for humans and animals. The forest fire in the Bromo region of Indonesia had a profound impact, both economically and environmentally. The closure of the Bromo Tengger Semeru National Park drastically reduced tourism, leading to an 80 % drop in hotel occupancy and severe losses for local businesses like jeep rentals, eateries, and souvenir shops. Economically, this resulted in a significant decrease in Non-Tax State Revenue. Environmentally, the fire destroyed over 50 hectares of land, severely damaging the national park's ecosystems and affecting biodiversity. The smoke and heat from the fire also led to poor air quality and potential health risks for local residents, as well as adverse effects on nearby agriculture, increasing stress and anxiety in the community. The study emphasizes the urgent need for stringent regulations, effective community engagement, and educational initiatives in forest conservation areas, particularly those attracting tourists. Our findings offer critical insights for policymakers, local authorities, and stakeholders in the tourism sector, highlighting the necessity of balancing environmental protection with the growth of the global travel industry. © 2024 The Author(s)

关键词： Bromo incident Community engagement Conservation tourism Ecological consequences Environmental protection Forest fires Human-induced fires

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Faults Identification of Induction Motor Based on Vibration Using Backpropagation Neural Network

Faults Identification of Induction Motor Based on Vibration ...

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2020 International Conference on Smart Technology and Applications, ICoSTA 2020

作者： Kuspijani, K. Watiasih, Richa Prihastono, Prihastono Bhayangkara Surabaya University Electrical Engineering Study Program Engineering Faculty Surabaya Indonesia

ISBN: (纸本)9781728130835

Vibration analysis is very important in predictive maintenance in the industry today. In this paper, has designed a vibration detection system that can identify the condition of the induction motor by online. Induction motor vibration data is read from two vibration sensors, accelerometer1 and accelerometer2, displayed using ATMEGA16 microcontroller and can directly identify the condition of the induction motor by using artificial intelligence-based analysis that is Backpropagation-Neural Network (B-NN). After testing, the system managed to perform fault identification induction motor with the rank of success of 95 percent. © 2020 IEEE.

关键词： Accelerometers

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The factors influencing digital literacy of vocational high school teachers in Yogyakarta 2

The factors influencing digital literacy of vocational high ...

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2nd International Conference on Vocational Education of mechanical and Automotive Technology, ICoVEMAT 2019

作者： Warno, K. Study Program of Fashion Engineering Education Faculty of Engineering Universitas Negeri Yogyakarta Indonesia

The purpose of this study is to reveal the condition of teachers' digital literacy and the effect of the achievement motivation towards digital literacy among Tourism vocational teachers in Yogyakarta based on age generation, i.e the generation differences of Baby Boomers, X and Y. This research belongs to ex-post-facto with a quantitative approach. The research subjects were 130 teachers consisting of teachers from state tourism vocational schools in Yogyakarta. The results showed that the majority of digital literacy among tourism vocational teachers can be categorized as medium and the variable of achievement motivation plays a significant influence on digital literacy. Moreover, there was a significant influence from the facilities that were used by the teachers towards their digital literacy. Also, there were differences in teachers' digital literacy among teachers who were born in the baby boomers generation, X and Y generation. It means that the variable age generation of teachers can improve the digital literacy skills of vocational school teachers in the field of tourism. © 2020 Published under licence by IOP Publishing Ltd.

关键词： Motivation

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Measuring the Complexity of EMG Signal by Using Fuzzy Approximate Entropy in Post-Stroke Patients Rehabilitation

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Journal of engineering Science and Technology Review 2021年第3期14卷 85-90页

作者： Rulaningtyas, Riries Prasetyo, Angga Bagus Rahmatillah, Akif Putra, Alfian Pramudita Rahma, Osmalina Nur Ain, Khusnul Pawana, I Putu Alit Biomedical Engineering Study Program Department of Physics Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia Department of Physical Medicine and Rehabilitation School of Medicine Universitas Airlangga Dr. Soetomo General Academic Hospital Surabaya Indonesia

Stroke is one of world’s highest medical cases that cause physical or mental problem, even death. The treatment for overcoming stroke so far was by conducting rehabilitation or therapy. The therapy progress could be seen over the improvement indicated by stroke patients after participation in rehabilitation program. So far, the assessment of the level of development exhibited by stroke patients are still subjective. Meanwhile, Electromyograph (EMG) can be used as a quantitative method to evaluate the patient's improvement. The complexity of the EMG signal could define the progress of a rehabilitation process related to muscle function. One of the methods to calculate the complexity is fuzzy approximate entropy (fApEn). This study aims to propose fApEn as a quantitative method to evaluate the condition of stroke patients by comparing the complexity of the normal EMG, affected, and unaffected side limb of the patient's EMG signal. The value of fApEn on Subject 1 showed that the affected side obtained the complexity of 0.18141 and on the unaffected side of 0.80740. Subject 2 showed the complexity on the affected side of 0.58597 and the unaffected side of 1.02787, whereas the healthy subjects showed the complexity of 2.07856. The statistical results showed that the data were homogeneous and normally distributed. There was a significant difference between the results of fApEn on the affected side and the unaffected side. Thus, fApEn could be used as a quantitative method to determine the condition of muscle activity. © 2021 School of Science, IHU. All rights reserved.

关键词： Entropy

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Organizational Culture's Significance in Technology and Innovation Management 2

Organizational Culture's Significance in Technology and Inno...

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2nd IEEE International Conference on Trends in Quantum Computing and Emerging Business Technologies, TQCEBT 2024

作者： Hari Krishna, Somanchi Fajarini, Ulfah Painoli, Arun Kant Visvesvaran, C. Jahnavi, K.N. Lourens, Melanie Vignana Bharathi Institute of Technology Department of Business Management Ghatkesar Mandal Medchal Malkajigiri Medchal Malkajigiri India Syarif Hidayatullah State Islamic University Faculty of Education Social Science Study Program Jakarta Indonesia Baddi University of Emerging Sciences and Technology School of Management Studies Himachal Pradesh Baddi India Sri Krishna College of Engineering and Technology Coimbatore India SIndhi Institute of Management Bangalore India Durban University of Technology Faculty of Management Sciences South Africa

ISBN: (纸本)9798350384277

Several studies have examined the connection between innovation, technology, and organizational culture in recent years. Management of technology and innovation is crucial to an organization's expansion and success. The development of an innovative organizational culture comes before technology and innovation management. This study's primary goal was to assess how organizational culture affects innovation in the Indian service sector. The study made use of a paradigm for understanding organisational culture created by Cameron and Quinn, which looks at culture as a collection of conflicting values from four angles. A descriptive survey research design was used in the investigation. Employees of service industries made up the study's population. More than twenty IT organizations participated in the survey, and 120 out of 180 respondents returned completed questionnaires. This indicated a response rate of 66%.The collected data was analyzed using inferential data analysis techniques and descriptive statistics. Tables and figures were created after analysis with IBM SPSS software. The results demonstrated that the strongest associations with innovation and technology were found in companies with flexible, collaborative, and employee-friendly cultures. Lastly, the study suggests areas for additional research, such as employing a new organizational culture model for the study or qualitative techniques for data collecting and analysis to reveal deeper cultural features. © 2024 IEEE.

关键词： importance Organisational culture service industry technology and innovation management

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Unleashing the Potential of Unidirectional mechanical Materials: Breakthroughs and Promising Applications

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Materials Sciences and Applications 2024年第4期15卷 66-86页

作者： Sunil Harripersad SBCS Global Learning Institute Limited Port of Spain Trinidad & Tobago Faculty of Mechanical Engineering Atlantic International University Honolulu Hawaii USA Faculty of Science American Association for the Advancement of Science (AAAS) Washington D.C. USA Department of Planning RCA and R&D Coosal&#8217s Group of Companies Port of Spain Trinidad and Tobago Caterpillar Engineering Technicians for the World Program Irving Texas USA Faculty of Engineering TECH Technological University Tenerife Spain

The emergence of mechanically one-way materials presents an exciting opportunity for materials science and engineering. These substances exhibit unique nonreciprocal mechanical responses, enabling them to selectively channel mechanical energy and facilitate directed sound propagation, controlled mass transport, and concentration of mechanical energy amidst random motion. This article explores the fundamentals of mechanically one-way materials, their potential applications across various industries, and the economic and environmental considerations related to their production and use.

关键词： mechanically One-Way Materials Nonreciprocal mechanical Responses Directed Sound Propagation Controlled Mass Transport Energy Harvesting Structural engineering Economic Viability Environmental Impact

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A study on the main parameters that affects the reliability of fatigue failure in a marine drilling riser 40

A study on the main parameters that affects the reliability ...

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2021 40th International Conference on Ocean, Offshore and Arctic engineering, OMAE 2021

作者： das Chagas, Bruno Luiz Barbosa Morooka, Celso Kazuyuki Technology and Innovation Department Ocyan SA Macae - RJ Brazil Faculty of Mechanical Engineering University of Campinas Campinas-SP Brazil Graduate Program in Petroleum Science and Engineering University of Campinas

ISBN: (纸本)9780791885147

Advances in subsea exploration in the oceans to discover new petroleum reservoirs and sometimes different kind of minerals at the seabed in ultra deepwater, continuously introduce new challenges in offshore drilling operations. This motivates the development of increasingly safe maritime operations. In offshore petroleum, a marine drilling riser is the pipe that connects a wellhead at the sea bottom to a drillship at the sea surface, as an access to the wellbore. It serves as a guide for the drilling column with the drill bit and conductor to carry cuttings of rock coming from the wellbore drilling and its construction. Drilling riser is constantly exposed to adversity from the environment, such as waves, sea currents and platform motions induced by waves. These elements of the environment are prevailing factors that can cause a riser failure during deepwater drilling operations with undesirable consequences for the environment. In the present work, key parameters that influence the probability of fatigue failure in a marine drilling riser are identified, and a parametric evaluation with those parameters are carried out. Dynamic behavior of a riser is previously calculated and fatigue damage is estimated. Afterwards, the First Order Reliability Method (FORM) is applied to determine the probability of fatigue failure on the riser. Fundamentals of the procedure are described, and results are illustrated through the analysis for a typical riser in deepwater drilling operation. Parametric evaluations are done observing points considered as critical along the riser length, and looking to the sensitivity of key parameters in the process. For this study, the SN curve from API guidelines is applied and accumulated fatigue damage is estimated from simulations of the stress time series and applying the Palmgren-Miner's rule. Finally, the influence of each parameter in the reliability of fatigue failure is verified and discussions given. Copyright © 2021 by ASME

关键词： Reliability

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