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Implications for fault locking south of Jakarta from an investigation of seismic activity along the Baribis fault, northwestern Java, Indonesia

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SCIENTIFIC REPORTS 2022年第1期12卷 1-10页

作者： Widiyantoro, S. Supendi, P. Ardianto, A. Baskara, A. W. Bacon, C. A. Damanik, R. Rawlinson, N. Gunawan, E. Sahara, D. P. Zulfakriza, Z. Husni, Y. M. Lesmana, A. Global Geophysics Research Group Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Bandung 40132 Indonesia Faculty of Engineering Maranatha Christian University Bandung 40164 Indonesia Agency for Meteorology Climatology and Geophysics (BMKG) Jakarta 10720 Indonesia Department of Earth Sciences Bullard Labs University of Cambridge Cambridge CB3 0EZ UK Geophysical Engineering Study Program Faculty of Mining and Petroleum Engineering Institut Teknologi Bandung Bandung 40132 Indonesia PT. Reasuransi Maipark Multivision Tower Menteng Atas Jakarta 12960 Indonesia

Recent borehole seismic deployments conducted along the Baribis Fault in northwestern Java reveal that it may be active. In this study, we exploit these data to locate proximal earthquakes using a relative relocation technique, estimate their moment magnitudes using a spectral fitting method and compute their focal mechanisms via waveform inversion. We observe that seismicity in the eastern part of the fault is significantly higher than in the west, where a previous GPS study of the region south of Jakarta demonstrated the existence of high compression rates. These observations imply that the western Baribis Fault is locked, and that neighbouring areas, including southern Jakarta and its surroundings, may be highly vulnerable to future sizeable earthquakes when accumulated elastic strain energy is eventually released during fault rupture. Significantly, the current generation of Indonesia's national hazard maps have not considered seismicity along the Baribis Fault. Our new results therefore call for an urgent reappraisal of the seismic hazard in northwestern Java that carefully takes into account the Baribis Fault and its earthquake potential, particularly in light of its proximity to Jakarta, a megacity that lies at the heart of one of the most densely populated islands in the world.

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The impact of copper oxide nanoparticles reinforced nanocellulose acetate membrane on antibacterial and dye removal Potency

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Results in engineering 2024年 23卷

作者： Yanuhar, Uun Suryanto, Heru Amin, Muhamad Maulana, Jibril Mohamad Lal, Mohammad Tamrin Caesar, Nico Rahman Study Program of Aquatic Resources Management Faculty of Fisheries and Marine Sciences Universitas Brawijaya East Java Indonesia Department of Mechanical and Industrial Engineering Faculty of Engineering Universitas Negeri Malang Jl. Semarang 5 Malang65145 Indonesia Department of Aquaculture Faculty of Fisheries and Marine Universitas Airlangga Jl. Dharmahusada Permai Surabaya60115 Indonesia Borneo Marine Research Institute Universiti Malaysia Sabah Jalan UMS Sabah Kota Kinabalu88400 Malaysia Doctoral Program of Environment Science Post Graduate Program Universitas Brawijaya Jalan Veteran East Java Malang65145 Indonesia

With the rapid growth of the textile, leather, cosmetics, and pharmaceutical industries, concerns about pollutants in these sectors, especially dye pollutants, are increasing. This research characterizes bacterial nanocellulose acetate membranes made from Sargassum extract reinforced with copper oxide nanoparticles and tests their antibacterial properties and dye removal in water. Sargassum sp. extract was fermented using Acetobacter xylinum for 10 days, producing bacterial nanocellulose, which was then esterified to create bacterial nanocellulose acetate. Copper oxide nanoparticles were added to the bacterial nanocellulose acetate solution in varying concentrations, cast, and oven-dried. The membrane was analyzed using Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscope, antibacterial activity, and dye removal. Results showed uniform copper oxide nanoparticles distribution on the membrane surface. Structure analysis revealed diffraction peaks at 35.44° and 38.57°, indicating a reduced crystalline index but improved membrane effectiveness. Antibacterial tests showed a zone of inhibition against bacterial growth, increasing with higher copper oxide nanoparticle content. The addition of copper oxide nanoparticles also influenced the dye removal capacity for Metanil Yellow, Congo Red, Eosin Yellow, Methylene Blue, and Malachite Green. The kinetic analysis showed that the adsorption process follows a pseudo-first-order model, with higher correlation coefficients (R2) compared to the pseudo-second-order model. © 2024 The Author(s)

关键词： Fourier transform infrared spectroscopy

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Assessment of road traffic performance of the Tsunami evacuation road in Padang Municipality area based on the traffic volume simulation approach 4

Assessment of road traffic performance of the Tsunami evacua...

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4th International Conference on Earthquake engineering and Disaster Mitigation, ICEEDM 2019

作者： Yossyafra, Yossyafra Fitri, Nurhuda Sidhi, Rahmat Punama Yosritzal, Yosritzal Mazni, Deni Irda Civil Engineering Department Faculty of Engineering Universitas Andalas Indonesia Civil Engineering Study Program Universitas Dharma Andalas Indonesia

There are many cities on the west coast of the Sumatra, which are at high risk of the Tsunami disaster. Regional Regulations on Regional Spatial Planning for each City/Regency have compiled disaster mitigation by constructing several evacuation roads. This study wants to illustrate: what are the volume of traffic generation and road performance, if there is a Tsunami disaster. The simulation is developed by predicting traffic volume based on parameters, population density, vehicle ownership, land use, and activities in the area around the road. The assessment was carried out on two tsunami evacuation roads in the city of Padang, West Sumatra Province. The results show that the highest traffic volume occurred in the period from 06.30 a.m until 3:00 p.m., during school activities. One of the roads will not be able to accommodate the volume of traffic during a disaster, due to significant traffic congestion. This study shows that: (1) the period of activity and land use are two main parameters, which must be considered in designing tsunami evacuation roads, (2) The degree of saturation ratio and the ratio between the capacity of sections of Tsunami evacuation routes can be proposed as a parameter for assessing the performance of Tsunami evacuation roads in urban areas. © 2020 The Authors, published by EDP Sciences.

关键词： Tsunamis

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Twenty years of e-learning in health science: A bibliometric 7

Twenty years of e-learning in health science: A bibliometric

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7th International Conference on Computer Science and Computational Intelligence, CSCI 2022

作者： Maulana, Fairuz Iqbal Febriantono, M. Aldiki Raharja, Dwi Risza Budi Khaeruddin Herasmara, Ridho Computer Science Department School of Computer Science Bina Nusantara University Jakarta11480 Indonesia Diploma III Electronic Technology Vocational Study Program University of Muhammadiyah Malang Indonesia Electrical Engineering Faculty of Science and Technology Raden Rahmat Islamic University Malang Indonesia

Education about health sciences has historically been limited in the curriculum of health professionals and largely inaccessible to the public. In practice, most of the health science education is still running conventionally. Supposedly with the advancement of technology and the use of the internet everywhere, learning such as e-learning can be important, especially in the health sector. Until this research was conducted, only 514 academic documents about e-learning in health sciences were found for 20 years from 2001 to 2020, obtained in searching on the Scopus database. This study presents a comprehensive overview of studies related to E-learning in the Health Sciences sector. This study uses bibliometric analysis and indexed digital methods to map scientific publications throughout the world. This research employs the Scopus database to gather information, as well as the Scopus online analysis tool and Vosviewer to show the bibliometric network. The method consists with five stages: determining search keywords, initial search results, refinement of search results, initial compilation, and data analysis. Among the most published and indexed articles by Scopus, papers published by researchers in the United States have the highest number of publications (80), followed by United Kingdom (63) and Australia with 45 academic publications. The processed data shows the pattern and trend of increasing the number of international publications in E-learning in Health Sciences field, which Scopus index. © 2022 Elsevier B.V.. All rights reserved.

关键词： Publishing

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Enhancing field-scale bioremediation of weathered petroleum oil-contaminated soil with biocompost as a bulking agent

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Case Studies in Chemical and Environmental engineering 2024年 9卷

作者： Helmy, Qomarudin Kardena, Edwan Environmental Engineering Study Program Institute of Technology Bandung Ganesa St. No. 10 West Java Bandung Indonesia Water and Wastewater Engineering Research Group Faculty of Civil and Environmental Engineering Institute of Technology Bandung Ganesa St. No. 10 West Java Bandung Indonesia

The field-scale cleanup of weathered petroleum oil-contaminated soils from the Minas Oil Fields in Indonesia was investigated using landfarming bioremediation technology. Sawdust produced from palm fronds, trunks, and bushes was used as a bulking agent, fermented with manure from cow, goat, and chicken dung as amylolytic and cellulolytic source microflora. Petrophylic bacteria known for their capability to degrade PAH were used as augmented microflora along with stimulated local indigenous microflora overgrown onsite. The findings demonstrated that, albeit at varying rates, the inoculum of native and augmented microflora raised the total colony-forming units (CFU) and the rate at which total petroleum hydrocarbons (TPH) were degraded in all contaminated soils treated in the soil bioremediation facilities (SBF). After 150 days of bioremediation operation, the bioremediation process for petroleum oil-contaminated soil effectively eliminated 165.79 kg of TPH from 2565 cubic meters of contaminated soil, with a recovery cost of 161 USD per cubic of treated soil. The initial average TPH concentration in the soil was 64,799 ± 9373 mg/kg and decreased to a lower concentration of 163 ± 74 mg/kg after bioremediation was completed. Both native and augmented petrophilic microflora showed significant growth over tenfold, with an average number of colonies at the initial stage of the bioremediation process ranging from 5.9 × 10⁵ to 6.6 × 10⁶ CFU per gram of soil. We show that a practical and affordable bioremediation technique is the onsite production of petrophylic microflora (both native and augmented) and compost from locally available biomass waste. © 2024 The Authors

关键词： Bioaugmentation Biocompost Bioremediation Field-scale Petroleum Petrophylic

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Transforming disposable masks to sustainable gasoline-like fuel via pyrolysis

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Environmental Advances 2024年 15卷

作者： Sari, Mega Mutiara Inoue, Takanobu Salsabilla, Vionna Chantika Septiariva, Iva Yenis Mulyana, Rahmad Prayogo, Wisnu Arifianingsih, Nur Novilina Suhardono, Sapta Suryawan, I. Wayan Koko Department of Environmental Engineering Faculty of Infrastructure Planning Universitas Pertamina Jakarta 12220 Indonesia Department of Architecture and Civil Engineering Toyohashi University of Technology Aichi Toyohashi 441-8580 Japan Civil Engineering Study Program Faculty of Engineering Universitas Sebelas Maret Jl. Ir. Sutami 36A Surakarta 57126 Indonesia Department of Civil Engineering Faculty of Engineering Universitas Negeri Medan North Sumatra Medan Indonesia Department of Environmental Engineering Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Bandung 40116 Indonesia Department of Environmental Science Universitas Sebelas Maret. Central Java Surakarta Indonesia

The past COVID-19 pandemic has led to a surge in the use of disposable masks, posing a significant environmental challenge due to the swift accumulation of waste. This study explores the potential of pyrolysis to transform this waste into valuable pyrolysis oil with characteristics akin to gasoline, addressing both waste management and energy derivation concerns. Pyrolysis, a thermal decomposition process, was applied to mask materials, producing an oil with a high calorific value of 45.93 MJ/kg. The chemical makeup of this pyrolytic oil was meticulously characterized using Pyrolysis-Gas Chromatography-Mass Spectrometry (PY-GC/MS) and Fourier-transform Infrared Spectroscopy (FTIR), confirming the presence of hydrocarbons similar to those found in gasoline. Achieving an efficiency of 41.865 %, the pyrolytic approach demonstrated a promising potential for not only managing mask waste but also creating an alternative energy carrier. However, the study advises that before considering this pyrolytic oil for engine use, a thorough evaluation of its combustion quality, engine compatibility, and environmental impact is essential. This investigation advances the discussion on sustainable waste management, offering insights into the generation of alternative fuels from daily waste streams, while also highlighting the necessity for comprehensive analyses to ensure the practicality and efficiency of such novel energy solutions. © 2023 The Author(s)

关键词： Alternative fuel sources Disposable masks Energy recovery techniques Medical waste valorization Thermochemical conversion

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Risk management implementation design with ISO 21001: 2018 to ensure University quality (Case study faculty of engineering Unsoed)

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AIP Conference Proceedings 2024年第1期2952卷

作者： Katon Muhammad Puspita Cahyaningrum Amanda Sofiana Hasyim Asyari Indro Prakoso Industrial Engineering Study Program Engineering Faculty Universitas Jenderal Soedirman Purwokerto Indonesia

The faculty of engineering, Jenderal Sudirman University, now referred to as the Unsoed engineering faculty, is one of the faculties at Jenderal Sudirman University. The Unsoed faculty of engineering has not implemented the ISO 21001:2018 quality assurance system and uses the 2020 SN Dikti standard. The implementation of ISO 21001:2018-based risk management at the General Sudirman University faculty of engineering is considered to be able to improve the operational performance of an organization. The increasing sources of risk from all aspects and the complexity of the risks that occur are the background for implementing risk identification. This study uses ISO 31000:2018 as a method for risk management. From the research that has been done, it is known that the SN Dikti 2020 still does not fulfill all the clauses of ISO 21001:2018. After identifying risks, there were 17 identified risks at the Unsoed engineering faculty. The Unsoed engineering faculty’s response to the identified risks is four avoided risks, six reduced risks, and seven accepted risks. Risk mitigation at the Unsoed engineering faculty is carried out for stakes, with risk responses being avoided and reduced.

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Communal-based domestic rainwater harvesting system: A novel approach to alternative solutions for increasing water supply and recharging groundwater in Jagakarsa urban area, South Jakarta

Case Studies in Chemical and Environmental Engineering

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Case Studies in Chemical and Environmental engineering 2025年 11卷

作者： Suprapti, Suprapti Kusuma, Muhammad Syahril Badri Kardhana, Hadi Cahyono, Muhammad Juliana, Imroatul Chalimah Doctoral Program of Civil Engineering Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Jl. Ganesha No. 10 Jawa Barat Bandung 40132 Indonesia Water Resources Engineering Group Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Jl. Ganesha No. 10 Jawa Barat Bandung 40132 Indonesia Civil Engineering Department Faculty of Engineering and Sciences Ibnu Khaldun Bogor University Jl. Sholeh Iskandar Km. 2 Jawa Barat Kota Bogor 16162 Indonesia Research Center for Ecohydrology Ecohydraulics and Engineering Science Bandung Jl. Babakan Jeruk 1 No. 100 Jawa Barat Bandung 40132 Indonesia Civil Engineering Study Program Sriwijaya University Jl. Raya Lintas Timur Palembang - Prabumulih No. Km. 32 Indralaya Indah South Sumatra Indralaya Indonesia Study Program of Civil Engineering Faculty of Engineering Universitas Mercu Buana Jl. Meruya Selatan No. 01 Kembangan-Jakarta Barat Jakarta 11650 Indonesia

This study proposes a new approach, a communal-based domestic rainwater harvesting (CDRWH) system, which is a new model that combines domestic and communal rainwater harvesting systems. This model is an alternative solution to improve system performance and utilize rainwater overflow from the system. Rainwater runoff from several domestic tanks is channeled to a communal tank to be collected, processed, and redistributed to needy domestic tanks. Overflow from the communal tank is used for groundwater recharge. The CDRWH system model aims to increase water supply, reduce runoff, and conserve groundwater. The model simulation uses daily water balance analysis and yield before spillage algorithm. The simulation scenario uses variations in roof area, number of house occupants, storage tank volume, and rainfall categories: 20 years, wet year, normal year, and dry year. Jagakarsa, an urban area in South Jakarta, was selected for the CDRWH system modeling. The results showed that the CDRWH model significantly improved the performance of the volumetric reliability (VR) and time reliability (TR) systems. In addition, the model could show a comparison of total groundwater recharge (GWR) and groundwater extraction (GWE), where the GWR capacity was higher. This allows centralized rainwater management in communal tanks, thereby reducing groundwater usage. The design of this model is simple. Therefore it can be easily duplicated for application in other locations. © 2025 The Authors

关键词： Communal-based domestic rainwater harvesting (CDRWH) Groundwater extraction (GWE) Groundwater recharge (GWR) Jagakarsa-South Jakarta Reduced runoff Water supply

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Determination of business development strategy using SWOT analysis and quantitative strategic planning (QSPM) to increase sales turnover

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AIP Conference Proceedings 2024年第1期2952卷

作者： Katon Muhammad Alfi Khoerunisak Budi Utami Tigar Putri Adhiana Hasyim Asyari Rani Aulia Imran Industrial Engineering Study Program Engineering Faculty Universitas Jenderal Soedirman Banyumas Indonesia

Rukun Makmur is one of the SMEs in the fisheries sector that cultivates freshwater ornamental lobsters. In 2019, the sales of Rukun Makmur MSMEs increased. However, in 2020, Rukun Makmur MSMEs experienced the impact of the Covid-19 Pandemic, resulting in a decline in sales. Therefore, this study aims to provide a proposed development strategy for MSMEs in Rukun Makmur. The analytical approach used is the tools in the form of CPM (Competitive Profile Matrix), BCG Matrix (Boston Consulting Group), Grand Strategy Matrix, and IE Matrix (Internal-External). As for the decision-making method, namely QSPM (The Quantitative Strategic Planning Matrix). The result of this research is that UMKM Rukun Makmur, compared to competitors, is in second place after UMKM C with a score of 3,013. Then, Rukun Makmur’s MSME market growth of -0.339 was in the medium position and the low position for its market share with a relative market share of 0.49. In addition, MSME Rukun Makmur is in the Hold and Maintain quadrant with a total IFE of 2,725 and an EFE of 2,482. The final result is a Development Strategy prioritized for Rukun Makmur SMEs: Market Penetration with TAS 6,587, Related Diversification with TAS 6,067, and Product Development with TAS 5,687.

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Enhancing Field-Scale Bioremediation of Weathered Petroleum Oil-Contaminated Soil with Biocompost as a Bulking Agent

SSRN

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SSRN 2023年

作者： Helmy, Qomarudin Kardena, Edwan Environmental Engineering Study Program Institute of Technology Bandung Ganesa St. No. 10 Bandung-West Java Indonesia Water and Wastewater Engineering Research Group Faculty of Civil and Environmental Engineering Institute of Technology Bandung Ganesa St. No. 10 Bandung-West Java Indonesia

The field-scale cleanup of petroleum oil-contaminated soils from the Minas Oil Fields in Indonesia was investigated using bioremediation. Sawdust produced from palm fronds was used as a bulking agent, and fermented with manure as an amylolytic and cellulolytic source of microflora. Petrophylic bacteria were used as augmented along with stimulated indigenous microflora overgrown onsite. The findings demonstrated that after 150 days of bioremediation, the operation effectively eliminated 165.79 kg of TPH from 2,565 m3 of contaminated soil, with a recovery cost of 161 USD per m3 of treated soil. The initial average TPH concentration in the soil was 64,799 mg/kg. © 2023, The Authors. All rights reserved.

关键词： Bioremediation

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