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Trends in citizen influencing willingness to participate in marine debris management and social well-being in Bali metropolitan, Indonesia

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Urban Governance 2024年第4期4卷 362-373页

作者： Suhardono, Sapta Lee, Chun-Hung Suryawan, I Wayan Koko Environmental Sciences Study Program Faculty of Mathematics and Natural Sciences Universitas Sebelas Maret Surakarta 57126 Indonesia Department of Natural Resources and Environmental Studies College of Environmental Studies and Oceanography National Dong Hwa University Taiwan Hualien 97401 Taiwan Department of Environmental Engineering Faculty of Infrastructure Planning Universitas Pertamina Jakarta 12220 Indonesia

In Bali, the high volume of tourists significantly contributes to marine debris, particularly plastics, which threatens the ecological health of beaches and marine life, impacting both tourism and local livelihoods. Effective management is crucial to preserve Bali's natural beauty and sustainability. This study explores the factors influencing the willingness to participate (WTP) in marine debris management among urban communities in the Bali metropolitan area, Indonesia. Utilizing a binary logistic regression model, we examine the impact of key elements for effective marine debris management, risk awareness, learning performance, and higher monthly income and geographic differences between inland and coastal communities. The findings reveal that effective management practices significantly enhance community participation, highlighting the importance of transparency, accountability, and well-organized efforts. Educational initiatives also play a crucial role, with performance in risk awareness and learning showing a marginally significant positive effect on WTP. Conversely, higher income levels negatively influence participation, suggesting a preference for institutional funding over personal contributions. Geographic differences indicate that coastal communities are more inclined to participate than inland communities. These insights provide valuable guidance for policymakers and practitioners in developing strategies to mobilize volunteers, enhance urban resilience, and promote social well-being. By implementing effective management practices, comprehensive educational programs, tailored engagement strategies, and fostering partnerships, urban communities in Bali can become more resilient and actively address environmental challenges. © 2024 The Authors

关键词： Community engagement Debris management Marine sustainability Social well-being Urban resilience

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Salacca zalacca extract's antiaging effect on aging genes, protein levels, and apoptosis in UV-induced fibroblast cells

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Journal of Taibah University Medical Sciences 2025年第3期20卷 349-358页

作者： Widowati, Wahyu Dani, Dani Vera, Vera Wargasetia, Teresa L. Rahardja, Fanny Tih, Fen Onggowidjaja, Philips Tjokropranoto, Rita Zahiroh, Fadhilah H. Azis, Rizal Priyandoko, Didik Surakusumah, Wahyu Hadiprasetyo, Dhanar S. Faculty of Medicine Maranatha Christian University West Java Bandung Indonesia Bimolecular and Biomedical Research Center Aretha Medika Utama West Java Bandung Indonesia Biomedical Engineering Department of Electrical Engineering Faculty of Engineering Universitas Indonesia West Java Depok Indonesia Biology Study Program Faculty of Mathematics and Science Education Universitas Pendidikan Indonesia West Java Bandung Indonesia Faculty of Pharmacy Universitas Jenderal Achmad Yani West Java Cimahi Indonesia

Objectives: Ultraviolet (UV) exposure can hasten the aging process of the skin. The use of chemicals for anti-aging has long-term adverse effects. The natural ingredients of snake fruit (Salacca zalacca L.) are known to have bioactive properties such as polyphenols, flavonoids, chlorogenic acid, and caffeic acid which have antiaging potential. The study aims to ascertain the potential of S. zalacca Extract (SZE) as an antiaging agent by in vitro assay. Methods: The SZE compound content was analyzed by LC-MS/MS. SZE viability test on human skin fibroblast (BJ) cells was carried out using the WST assay. BJ cells were UV-induced as a cell model of premature aging. SZE 6.25, 12.5, and 25 μg/mL were administered to UV-induced BJ cells. The gene expression of COL1A1, MMP-1, FGF-2, and GPX-1 were analyzed by quantitative Real-Time PCR. Elastin (ELN), Hyaluronidase (HAse), Cyclooxigenase-2 (COX-2), 8-Hydroxydeoxyguanosine (8-OHdG), and Melatonin (MT) protein levels were analyzed by ELISA assay. The apoptosis of BJ cells was analyzed using flow cytometry. One-way ANOVA in SPSS Software was used for statistical analysis. Results: Treatment with SZE increased COL1A1, FGF-2, and GPX-1 gene expression and also decreased MMP-1 gene expression. SZE also increased ELN and MT levels in UV-induced BJ cells. After SZE treatment, the protein levels of HAse, COX-2, and 8-OHdG decreased compared to the positive control. SZE also succeeded in maintaining the lives of BJ cells and reducing apoptosis in BJ cells. Conclusions: SZE has the potential to be an antiaging agent by in vitro assay. © 2025 The Authors

关键词： Antiaging Antioxidant Chlorogenic acid Salacca zalacca Ultraviolet

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Stability Analysis of Speed Control Systems for Variable Speed Wind Power Generation Systems Using SRG and Capacitor-Less AC-AC Converters

Stability Analysis of Speed Control Systems for Variable Spe...

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International Conference on Renewable Energy Research and Applications (ICRERA)

作者： Haozheng Jia Kazuhiro Ohyama Engineering Master's Program of Electrical Engineering Graduate School Fukuoka Institute of Technology Higashi-ku Fukuoka Japan Department of Electrical Engineering Faculty of Engineering Fukuoka Institute of Technology Higashi-ku Fukuoka Japan

ISBN: (数字)9798350375589

ISBN: (纸本)9798350375596

This paper extends previous work on simulation models of switched reluctance generators (SRG) by demonstrating that selecting appropriate proportional-integral (PI) gain settings enables rapid adaptation to wind speed variations, thereby ensuring system stability. The study shows that employing continuously varying gains provides a detailed understanding of the system's dynamic performance, offering insights into the effects of different gain profiles on stability. The transient responses induced by changes in PI gain are effectively mitigated through the introduction of a compensatory signal derived from the system's maximum transient response. Alternatively, it has been demonstrated that a gain with a smooth transition profile, such as one based on a Bessel curve, achieves a comparable stabilizing effect by eliminating transient phenomena and improving response smoothness. These measures collectively enhance the system's stability and robustness, making the control framework more adaptable to dynamic conditions and offering practical insights for the design of wind power generation systems. The findings highlight the potential of these methods to optimize energy conversion and improve the operational reliability of SRG-based systems under varying wind speeds.

关键词： Transient response Renewable energy sources System dynamics Wind speed Velocity control Switches Wind power generation Stability analysis Robustness Transient analysis

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Developing a Demonstration Video on Making Dry Banana Preferred by Generation Z 3

Developing a Demonstration Video on Making Dry Banana Prefer...

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3rd International Conference on electrical, Electronics, Informatics, and Vocational Education, ICE-ELINVO 2020

作者： Anggraeni, A.A. Surya, R.A. Culinary Science Study Program Faculty of Engineering Universitas Negeri Yogyakarta Indonesia

The student of vocational high school nowadays are classified as generation Z. They are common to use information and communication technology. They prefer audio-visual learning media rather than podcast recording or text media. This study aimed to develop a video on making dry banana for the Agriculture Product Processing course and assessing the video's feasibility. This study was a research & development (R&D) study using the 4D (define, design, develop, and disseminate) approach. Analysis of content, curriculum, and student needs was carried out in the define stage. The scriptwriting and production team selection was conducted in the design stage. Video recording, editing, and feasibility test from experts were performed in the development stage. The video was evaluated by two content experts and one media expert. In the disseminate stage, thirty students as prospective consumers evaluated the video feasibility. The data were analyzed descriptively. The video was in the mp4 format and had a duration of 13 minuter and 13 seconds. The video has been provided with high-definition images, captions, pictures, 2D animations, transitions, and effects. The experts and the students rated this video to be very feasible to be used as instructional media. © 2021 Published under licence by IOP Publishing Ltd.

关键词： Students

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The Recommendation System for Increasing the Independence of Micro, Small and Medium Enterprises (MSMEs) Using the Normalized Rating Frequency (NRF) Method 4

The Recommendation System for Increasing the Independence of...

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4th International Conference on Information and Communications Technology, ICOIACT 2021

作者： Lestari, Sri Yulmaini Aswin Kurniawan, Rio Sulyono Pratama, Yan Aditiya Faculty of Computer Science Informatics Engineering Study Program Bandar Lampung Indonesia Faculty of Business Economics Management Study Program Bandar Lampung Indonesia

ISBN: (纸本)9781665433945

Micro, Small, and Medium Enterprises (MSMEs) have an important role in improving the economy of small communities and the stability of the Indonesian economy. However, they still face various problems such as capital, raw materials, distribution, licensing, and others. This study developed a special treatment recommendation system to increase the independence of MSMEs by adopting a ranking-based method to produce recommendations related to problem-solving steps from MSMEs. The ranking method used Normalized Rating Frequency (NRF). This method performed an aggregation process of the ratings given by MSMEs in looking at the priority level of problem-solving based on previous experience. The result of the experiment showed that an average NDCG value was 0.7916. This explained that the quality of the ranking was good so that it was feasible to be recommended in solving problems in the form of special treatment to acquire to the independence of MSMEs. © 2021 IEEE

关键词： Recommender systems

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Automated Diagnosis of Heart-Lung Diseases in Chest X-ray Images 5

Automated Diagnosis of Heart-Lung Diseases in Chest X-ray Im...

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5th International Conference on engineering Technology and its Applications, IICETA 2022

作者： Alslatie, Mohammad Alquran, Hiam Mustafa, Wan Azani Abu-Qasmieh, Isam Alqudah, Ali Mohammad Alkhayyat, Ahmed The Institute of Biomedical Technology King Hussein Medical Center Royal Jordanian Medical Service Amman Jordan Yarmouk University Biomedical Systems and Medical Informatics Engineering Irbid Jordan Arau Faculty of Electrical Engineering Technology Perlis Malaysia University of Manitoba Biomedical Engineering Program Department of Electrical and Computer Engineering Canada The Islamic University Faculty of Engineering Najaf Iraq

ISBN: (纸本)9781665472159

The state of the art of artificial intelligence (AI) for various medical imaging applications leads to enhanced accuracy, analysis, visualization, and interpretation of chest Xray (CXR) images for diagnosis. Many diseases are diagnosed based on CXR images. In this paper, two types of abnormalities are diagnosed based on AI techniques. The two classes are atelectasis and cardiomegaly. The acquired images are segmented to localize the chest region and then enhanced using gray-level transformation methods. The enhanced images are passed to two pretrained convolutional neural networks (CNNs): shuffle and mobile net. The transfer learning approach is utilized in this stage. The automated features are extracted from the last fully connected layer. Each CNN deserves to have the two most representative features for the two classes. These four features are passed to support the vector machine classifier. The training accuracy reached 100% and the test accuracy was 96.7%. The proposed method can be extended to be a milestone in the classification of all heart-lung diseases that can be diagnosed using chest X-ray images. © 2022 IEEE.

关键词： Convolutional neural networks

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Comprehensive assessment of water and sediment quality to support sustainable management practices and mitigate potential risks of trace metal pollution in the Johor River Basin, South Peninsular Malaysia

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Ecohydrology and Hydrobiology 2025年第2期25卷 315-329页

作者： Mazilamani, Lelavathy S. Annammala, Kogila V. Martin, Patrick Qi, Liang Y. Sugumaran, Dhinesh Ling, Yong E. Reynard, P.S. Nurhidayat, Agus Syawal, Muhamad S. Sutapa, Ignasius D.A. Department of Water & Environmental Engineering Faculty of Civil Engineering Universiti Teknologi Malaysia Johor Bahru Malaysia Disaster Preparedness and Prevention Centre Universiti Teknologi Malaysia Kuala Lumpur Malaysia Asian School of the Environment Nanyang Technological University Singapore Centre of Environmental Sustainability & Water Security (IPASA) Research Institute for Sustainable Environment (RISE) Universiti Teknologi Malaysia Johor Bahru Malaysia Faculty of Engineering – Industrial Engineering International Study Program University of Indonesia Indonesia Asia Pacific Centre for Ecohydrology (APCE) – UNESCO C2C Indonesia Research Centre for Limnology and Water Resources – NRIA Indonesia Faculty of Environmental Science and Technology – Soegijapranata Catholic University (SCU) Semarang Indonesia

Human activities have caused concerns over the contamination of trace elements in aquatic systems due to their toxicity, long-lasting nature, and ability to accumulate in living organisms. This study evaluated the spatial pattern, environmental hazard, and potential health hazard of 13 trace metals in water and sediment samples collected from the Johor River basin using multivariate statistical techniques in order to identify the impact of both natural and human-related factors on the presence of trace metals in the area. The increased levels of metals in Station S1 indicated a significant impact from municipal, domestic, and industrial waste. The Geo-accumulation Index (I_geo) values for pollution and ecological indices in the sediment of the Johor River Basin ranged from -9.44 to 6.27. The Pollution Load Index (PLI) values ranged from 0.05 to 0.18, and the Potential Ecological Risk Assessment (RI) values ranged from 2.15 to 11.18. These results indicate that the sediments in the Johor River Basin have a low risk of contamination from trace metals. The water's hazard quotient (HQ) had an average value of 0.0001, while the hazard index (HI) had an average value of 0.0003. It is important to increase stakeholders' understanding and concerns regarding the potential long-term human health and ecological implications associated with trace metals in Johor River water. The results of this study offer essential initial information for government entities to implement sustainable management strategies, reducing the likelihood of future trace metal contamination issues in the Johor River basin and similar regions. © 2024 European Regional Centre for Ecohydrology of the Polish Academy of Sciences

关键词： Health assessment Johor river basin Multivariate analysis Sediment quality Trace metals Water quality

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Selectivity of CO_(2)reduction reaction to CO on the graphitic edge active sites of Fe-single-atom and dual-atom catalysts:A combined DFT and microkinetic modeling

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Carbon Resources Conversion 2024年第1期7卷 21-31页

作者： Ahmad Nuruddin Adhitya Gandaryus Saputro Arifin Luthfi Maulana Febdian Rusydi Fiki Taufik Akbar Hadi Teguh Yudistira Hermawan Kresno Dipojono Advanced Functional Materials Research Group Faculty of Industrial TechnologyInstitut Teknologi BandungJl.Ganesha No.10Bandung 40132Indonesia Research Center for Nanosciences and Nanotechnology Institut Teknologi BandungJl.Ganesha No.10Bandung 40132Indonesia Research Center for Quantum Engineering Design Department of PhysicsFaculty of Science and TechnologyUniversitas AirlanggaSurabaya 60115Indonesia Theoretical High Energy Physics Research Division Faculty of Mathematics and Natural SciencesInstitut Teknologi BandungJl.Ganesha No.10Bandung 40132Indonesia Mechanical Engineering Study Program Institut Teknologi Sumatera(ITERA)South LampungLampungIndonesia Department of Materials Science and Engineering University of CaliforniaBerkeleyBerkeleyCA 94720United States

We study the carbon dioxide reduction reaction(CO_(2)RR)activity and selectivity of Fe single-atom catalyst(Fe-SAC)and Fe dual-atom catalyst(Fe-DAC)active sites at the interior of graphene and the edges of graphitic nanopore by using a combination of DFT calculations and microkinetic *** trend of limiting potentials for CO_(2)RR to produce CO can be described by using either the adsorption energy of COOH,CO,or their ***_(2)RR process with reasonable reaction rates can be achieved only on the active site configurations with weak tendencies toward CO *** efficiency of CO_(2)RR on a catalyst depends on its ability to suppress the parasitic hydrogen evolution reaction(HER),which is directly related to the behavior of H adsorption on the catalyst’s active *** find that the edges of the graphitic nanopore can act as potential adsorption sites for an H atom,and in some cases,the edge site can bind the H atom much stronger than the main Fe *** linear scaling between CO and H adsorptions is broken if this condition is *** condition also allows some edge active site configurations to have their CO_(2)RR limiting potential lower than the HER process favoring CO production over H2 production.

关键词： CO_(2)RR FexNy active site Fe-SAC Fe-DAC Graphitic edges DFT Microkinetic

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Robust optimization of power system stabilizer parameters based on pole placement 18

Robust optimization of power system stabilizer parameters ba...

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18th International Conference on electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON 2021

作者： Panyarat, Thanon Uatrongjit, Sermsak Chiang Mai University Faculty of Engineering Master Degree Program in Electrical Engineering Thailand Electrical Generating Authority of Thailand Thailand Chiang Mai University Faculty of Engineering Department of Electrical Engineering Thailand

ISBN: (纸本)9780738111278

This paper presents a new approach based on pole-placement technique for robust optimization of power system stabilizer (PSS) parameters. The parameters design is formulated as an optimization problem aimed for adjusting all system poles to be in the specific region of s-plane. It is then solved by using the genetic algorithm. The proposed method has been implemented in MATLAB environment and applied to the single machine infinite bus (SMIB) model. The preliminary results from simulation show that the proposed parameter optimization technique can further enhance the power oscillation damping compared to the conventional approach. © 2021 IEEE.

关键词： Genetic algorithms

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Performance Evaluation of Multi-ONU Customers Access Network using Spectrum Slicing and Duplication Techniques 5

Performance Evaluation of Multi-ONU Customers Access Network...

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5th International Conference on Emerging electrical Energy, Electronics and Computing Technologies, ICE4CT 2024

作者： Rahman, Juwairiyyah Abdul Mugunthan, Sivaguru A.L. Hassan, Hasliza Abu Muslim, Norliana Ab-Rahman, Mohammad Syuhaimi Department of Electrical Engineering Faculty of Engineering and Life Sciences Universiti Selangor Selangor Bestari Jaya45600 Malaysia Department of Computer and Communication Technology Faculty of Information and Communication Technology Universiti Tunku Abdul Rahman Perak Kampar31900 Malaysia Department of Electrical Electronics and Systems Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Malaysia Electrical and Computer Engineering Program Faculty of Engineering Sohar University PC:311 Sohar Oman

This study aims to increase the number of access users by limiting the sample size to 30 users while ensuring that every Optical Network Unit (ONU) receives data from the Optical Line Terminal (OLT). The proposed solution allows for the determination of power requirements at each ONU based on bus-star topologies, facilitating an increase in user capacity. The power received by each ONU is a critical parameter that system designers must consider when planning the implementation of Fiber to the Home (FTTH), as it impacts the output data in terms of Bit Error Rate (BER) and Signal Quality Factor (QF) for each user. Various parameters were evaluated to ensure that the enhanced network improves scalability while adhering to standard specifications. These parameters included the Q-factor, BER, eye diagram, user count, and received power. The study employed slicing and duplication techniques, utilizing Arrayed Waveguide Grating (AWG) for signal duplication and Wavelength Division Multiplexing for signal slicing. The simulations were conducted using a transmitter operating at a frequency of 1491 nm with a power output of 0 dBm, utilizing the latest version of OptiSystem 20 software. The results highlighted the system's capability to support a total of 73,728 users, meeting stringent performance criteria. Specifically, the system achieved a Q-factor greater than 6, indicating high signal quality, and a bit error rate (BER) lower than 1 × 10-9, ensuring reliable data transmission. For the sampled 30 users, the average Q factor was 8.1527, and the average BER was 5.3648 × 10^-11, with an output power level of -54.278 dBm. Despite an increase in users, the quality of the data supplied to clients remained unchanged. These outcomes underscore the robustness and efficiency of the design in delivering high-capacity, error-resilient optical communication. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Q factor measurement

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