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7th International Conference on Architecture and Civil engineering, ICACE 2023

作者： Farichah, Himatul Hutama, Dio Alif Firmansyah, Yerry Kahaditu Department of Civil Engineering Faculty of Engineering Universitas Pembangunan Nasional "Veteran" Jawa Timur Jalan Rungkut Madya No. 1 Surabaya60294 Indonesia Study Program of Environmental Engineering Department of Biology Faculty of Science and Technology Universitas Airlangga Jalan Dr. Ir. H. Soekarno Surabaya60115 Indonesia

ISBN: (纸本)9789819707508

Microbially induced calcite precipitation (MICP) is an emerging geotechnical improvement technology that has received wide attention from researchers around the world. The applications of MICP in geotechnical field including soil improvement, surface resistance from erosion, coastal protection, and slope stabilization have been investigated by previous researchers. This paper presents a review on application of MICP for slope stabilization. Three subtopics were selected to be discussed: application of native bacteria, modified MICP methods, and field-scale studies. This review reveals that (1) MICP has the potential for slope stabilization;(2) native bacteria are ideal for use in MICP for application in slopes located in regions with variable cold climatic conditions;(3) to improve the effectiveness of MICP for slope stability, traditional MICP needs be modified;(4) MICP appears to have the potential to be one of the future landslide mitigation strategies since it works effectively in the field-scale test. Additionally, the recommended further researches in MICP for slope stabilization are: (1) study on the other types of native bacteria for diverse environmental condition is required;(2) to discover the best slope stabilization method, the combination of MICP and other traditional slope stabilization techniques should be investigated;(3) it is critical to investigate the effectiveness of the MICP technology for slope stabilization under various conditions in the field. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Slope stability

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Developing a Waste Management Strategy for Reducing Jakarta's Greenhouse Gas Emissions

SSRN

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SSRN 2024年

作者： Kristanto, Gabriel Andari Dahlan, Astryd Viandila Sekarsari, Nindi Environmental Engineering Study Program Civil Engineering Departement Engineering Faculty Universitas Indonesia Depok16424 Indonesia

Increasing amount of waste poses substantial environmental issues because poor waste management emits higher greenhouse gas (GHG, contributing to global warming and climate change. As Indonesia's most populous city, Jakarta faces challenges related to waste management. The city generates significant waste daily, with limited resources and funding to manage it *** study aims to analyze GHG emissions from Jakarta's waste sector and design management scenarios to optimize GHG emission reductions. The research examines local factors to determine the most effective scenario for Jakarta from three proposed waste management designs. The findings may serve as a basis for policymaking that promotes low-carbon and climate-resilient regional development. The study demonstrates that integrated waste management can significantly reduce GHG emissions compared to current practices in Jakarta. However, challenges related to policy and legal frameworks, stakeholder engagement, waste facility technologies, and financial resources must be addressed to achieve these reductions. © 2024, The Authors. All rights reserved.

关键词： Greenhouse gas emissions

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Effect of physical and biological pretreatment on sugarcane bagasse waste-based biogas production

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Materials Today: Proceedings 2023年 87卷 41-44页

作者： Sumardiono S. Matin H.H.A. Sulistianingtias I. Nugroho T.Y. Budiyono B. Department of Chemical Engineering Faculty of Engineering Universitas Diponegoro Semarang 50239 Indonesia Study Program of Environmental Science Faculty of Mathematic and Natural Science Universitas Sebelas Maret Surakarta 57126 Indonesia Vocational School Universitas Diponegoro Semarang 50239 Indonesia

Sugarcane bagasse is a biomass with very potential, especially in agricultural countries. In this research, a study related to pretreatment and the ratio of C/N to biogas production from sugarcane bagasse was conducted. The study was carried out on a laboratory scale with physical pretreatment by grinding with a size of 6 mesh, then biological pretreatment with the microbial consortium 5 % g/V, and variations in the C/N ratio at 25 and 30. Cow rumen fluid was used in this study as a source of anaerobic bacteria and technical urea is used to adjust the C/N ratio. The solid total is set at 7 %. Based on research that has been carried out for 60 days, it was found that physical pretreatment by grinding with a size of 6 mesh can increase biogas production. Biogas production increased both at C/N ratio conditions of 25 and 30. Furthermore, biological pretreatment with the microbial consortium 5 % g/V was proven to increase biogas production at both C/N ratios of 25 and 30. Further studies on the C/N ratio, it was found that the C/N ratio of 25 was better than the C/N ratio of 30. This is evident in several variables, including raw and fine substrate conditions, as well as on variables with or without a microbial consortium, with the amount of biogas productivity at a C/N 25 ratio of 53-90.5 % higher than the C/N 30 ratio. © 2023 The Authors. All rights reserved.

关键词： Biogas Biological pretreatment Physical pretreatment Sugarcane bagasse

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Review of Nano-Composite PCM AlN/EG and Heat Pipe as a Hybrid Battery Thermal Management System 4

Review of Nano-Composite PCM AlN/EG and Heat Pipe as a Hybri...

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4th International Symposium on Advances and Innovation in Mechanical engineering, ISAIME 2023

作者： Kadek Ervan Hadi Wiryanta, I. Nindhia, Tjokorda Gde Tirta Septiadi, Wayan Nata Made Joni, I. Study Program of Mechanical Engineering Faculty of Engineering Udayana University Bali Bukit Jimbaran80361 Indonesia Mechanical Engineering Department Politeknik Negeri Bali Bali Badung Indonesia Department of Physics Padjadjaran University Jl. Raya Bandung Sumedang KM 21 Jatinangor Jawa Barat45363 Indonesia

The battery thermal management system (BTMS) is essential for maintaining the battery's temperature and hence its performance. BTMS is classified into three types: active cooling, passive cooling, and hybrid approaches. Because of its simple design, lack of additional power, and even temperature distribution, PCM is extensively used as a BTMS as a passive cooling technique. PCM also has drawbacks like leak sensitivity and limited heat conductivity. This stimulates PCM performance enhancement attempts. Adding reinforcing material to PCM is a standard way to increase its performance. Aluminum nitride (AlN) and expanded graphite (EG) are commonly employed as fillers. The addition of EG and nano-AlN materials can improve the performance of PCM composites compared to pure PCM. Chemical interactions between these materials do not take place either. It is undeniably advantageous that these two materials may be combined into pure paraffin-based PCM for energy storage applications. The combined or hybrid system of BTMS is the optimum alternative for increasing heat transmission from the battery modules into the surrounding environment. The battery temperature will at good maintained well with the combination of 2 (two) and 3 (three) passive cooling methods or even combined with active cooling methods such as air-forced convection. In BTMS, the heat pipe is widely employed as a heat transfer improvement. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Heat pipes

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Performance of Pico Scale Turgo Turbine in Difference the Nozzle Diameter

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International Journal of Fluid Machinery and Systems 2022年第1期15卷 130-136页

作者： Adanta, Dendy Syofii, Imam Sari, Dewi Puspita Wiyono, Apri Department of Mechanical Engineering Faculty of Engineering Universitas Sriwijaya Indralaya South Sumatera 30662 Indonesia Study Program of Mechanical Engineering Education Universitas Sriwijaya Indralaya South Sumatera 30662 Indonesia Department of Automotive Engineering Education Universitas Pendidikan Indonesia Bandung West Java 40154 Indonesia

Pico scale Turgo turbine (PSTT) is proper as a power plant to be applied for remote areas because of its simple construction, cheap investment cost, and good performance above 35%. However, the design of PSTT is still based on estimation because the wheel diameter and nozzle diameter (D/d) ratio are not yet in reasonable agreement. Furthermore, the literature on D/d affects PSTT performance has not been comprehensive. Accordingly, this study investigates the relation of D/d on PSTT performance and its effect on the U/Vjet. Based on experimental results, the relation of D/d and U/Vjet to PSTT performance is parabolic (expressed by polynomial quadratic);the maximum configuration of D/d of 22, and U/Vjet between 0.42 to 0.47. © 2022, Turbomachinery Society of Japan. All rights reserved.

关键词： Energy conversion

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Citrus Limon L. Ripeness Identification Using Feature Extraction of Mean RGB, HSV, LBP and K-Nearest Neighbor

Citrus Limon L. Ripeness Identification Using Feature Extrac...

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2023 International Seminar on Application for Technology of Information and Communication, iSemantic 2023

作者： Priyo Utomo, Ade Cahyo Sari, Christy Atika Rachmawanto, Eko Hari Hadi, Heru Pramono Mostafa, Salama A. Al-Dayyeni, Wisam Subhi Talib University of Dian Nuswantoro Study Program in Informatics Engineering Semarang Indonesia University of Dian Nuswantoro Study Program in Information Systems Semarang Indonesia Universiti Tun Hussein Onn Malaysia Faculty of Computer Science and Information Technology Johor Malaysia Ada University School of Information Technologies and Engineering Baku Azerbaijan

ISBN: (纸本)9798350339215

Citrus Limon L. (Lemon) is a type of fruit that is currently widely consumed, because it contains abundant vitamin C, fiber, and antioxidants. This fruit have high potential in the agribusiness sector and is widely cultivated by traditional farmers. However, during harvest time, traditional farmers generally still use manual methods using the human eye in distinguishing the maturity level of lemons which is less efficient because it has a low accuracy. Digital image processing is one solution to this problem. In the research on the classification of lemon maturity levels using digital image processing with the feature extraction method of the Mean RGB, HSV, and LBP methods and the K-Nearest Neighbor classification algorithm in this study, a total of 120 lemon images were used which were divided into 80 training image data and 40 image data. testing. The results of model performance measurements in the form of the highest accuracy level in the Mean RGB method of 100%, the highest accuracy in the HSV method of 98%, and the highest accuracy in the LBP method of 82.5%. © 2023 IEEE.

关键词： Citrus fruits

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Enhancing Agricultural Efficiency and Sustainability Through Smart Direct Couple Motor Operated Valve: A Technological Innovation for Automated Irrigation and Fertilization

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SSRN 2024年

作者： Nugraha, Muhamad Hanhan Hanhan Rabbika, Anes Inda Rusdja, Andy Permana Bustomi, Ahmad Mechanical Engineering Study Program Mechanical Engineering Department State Polytechnic of Jakarta Depok16425 Indonesia Manufacturing Engineering Technology Study Program Mechanical Engineering Department State Polytechnic of Jakarta Depok16425 Indonesia Mechanical Engineering Study Program Faculty of Engineering Mayasari Bakti University Tasikmalaya46196 Indonesia

This research introduces the Smart Direct Couple Motor Operated Valve (SDCMOV), designed to enhance agricultural efficiency and sustainability. SDCMOV automates the distribution of water and fertilizers in vegetable farming, reducing labor intensity and inefficiencies. The system addresses key issues such as minimizing musculoskeletal disorders (MSDs) among farmers and ensuring consistent nutrient delivery for optimal plant growth. Energy-efficient, environmentally friendly, and remotely controllable via mobile devices, SDCMOV significantly improves irrigation and fertilization processes. Experimental results suggest that SDCMOV is a viable solution for sustainable and modern agricultural practices, particularly in developing countries. © 2024, The Authors. All rights reserved.

关键词： Irrigation

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Refining the Regional Aftershocks Catalog of the Ambon Earthquake Mw 6.5 on 26 September 2019 using manual picking and a non-linear algorithm: Preliminary Result 9

Refining the Regional Aftershocks Catalog of the Ambon Earth...

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9th Asian Physics Symposium 2021, APS 2021

作者： Kamaruddin, B. Sahara, D.P. Halauwet, Y. Master Program of Geophysical Engineering Faculty of Mining and Petroleum Engineering Bandung Institute of Technology Indonesia Global Geophysics Research Group Faculty of Mining and Petroleum Engineering Bandung Institute of Technology Indonesia Earth Sciences Graduate Program Faculty of Earth Sciences and Technology Bandung Institute of Technology Indonesia Ternate Indonesia Ambon Indonesia

A destructive earthquake with magnitude Mw 6.5 occurred in Ambon, Indonesia, on 26 September 2019. This earthquake generated an aftershock sequence. In this study, we determined the location of the aftershock sequence using a non-linear algorithm from the Non-Linear Location (NonLinLoc) program. The catalog and waveform data were collected using 11 seismographs from BMKG regional network located around the Maluku archipelago. The data was recorded between 26 September and 18 October 2019. We have manually picked the P-and-S wave phase by using Seisgram2K software. In our preliminary result, we have located about 1,300 events of aftershock sequence with about 8,500 phases of P and S waves. Overall, the location of the focus depth of the aftershock sequence is dominantly distributed in between 5 - 25 km. Approximately ∼70% of the distribution of aftershock locations show a North-South (N-S) oriented pattern from west Seram to Ambon Islands. Meanwhile, about ∼20% of the aftershock's locations are distributed around Ambon Island. Our ongoing and future study is to determine accurate hypocentre location derived from double-difference hypocenter relocation with waveform cross-correlation. © Published under licence by IOP Publishing Ltd.

关键词： Location

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Urban geotourism development in the perspective of stakeholders

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International Journal of Geoheritage and Parks 2025年第1期13卷 102-116页

作者： Hadian, Mohamad Sapari Dwi Barkah, Mochmad Nursiyam Khadidjah, Ute Lies Siti Yuliawati, Ayu Krishna Aryanti, Asti Nur Suhardiman, Sani Geological Engineering Padjadjaran University Bandung 45363 Indonesia Communication Faculty Padjadjaran University Bandung 45363 Indonesia Economics and Business Education Faculty Indonesia University of Education Bandung 40154 Indonesia Management Study Program Universitas Indonesia Membangun Bandung 40266 Indonesia English Language Education Yogyakarta State University Sleman 55281 Indonesia Engineering Faculty Universitas Buana Perjuangan Karawang 41361 Indonesia

Geotourism is rapidly experiencing rapid growth in developing countries, such as Indonesia, and it is a component of sustainable tourism. In addition, the country has many areas of geodiversity in cities or towns that potentially can become urban geotourism destinations, such as the Bandung Basin area. This region is characterized by geological features, including young volcanic rocks surrounding the mountains, alluvial fans, and lake deposits at lower elevations extending from Rancaekek to the base of Mount Lagadar in the western part of the area. Therefore, this research aims to analyze the respective roles of stakeholders in urban geotourism development. The study used literature review and interview methodology, where data was interpreted with stakeholder analysis, and complemented by descriptive analysis. The results showed that stakeholders were divided into primary (quadrant 1), key (quadrant 2), and secondary (quadrant 3) categories, each with distinct interests and degree of influence. As urban tourism expands, it presents ongoing opportunities to cultivate sustainable practices within these locales. The establishment of urban geotourism necessitates the identification and evaluation of engaged stakeholders. The subsequent planning and management initiatives for the Bandung Basin area can be enhanced through the active participation of stakeholders. © 2025 Elsevier B.V.

关键词： Indonesia stakeholder analysis urban geotourism volcanoes

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Design Implementation of Flood Early Warning System for Residential Monitoring

Design Implementation of Flood Early Warning System for Resi...

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International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications (ICRAMET)

作者： Joni Welman Simatupang Thariq Auliya Arrazaq Electrical Engineering Study Program Faculty of Engineering President University Cikarang Indonesia

The efforts to mitigate floods are necessary. One of the tools that can contribute to flood mitigation is the Flood Early Warning System (FEWS). The main goal of this study is to design a prototype of FEWS that can be easily used anywhere, anytime, and provide accurate water level readings. The prototype system is designed using an Ultrasonic Sensor for water level detection, an alarm system, and Blynk as a web and mobile dashboard. The prototype consists of four main components: Ultrasonic Sensor HC-SR04, Arduino Nano, NodeMCU, and HC-12. It comprises two units: a transmitter unit and a receiver unit. To determine the accuracy and consistency of the Ultrasonic Sensor, the author conducted testing using calibration, non-continuous, and continuous methods. The accuracy obtained was 99.71%. Additionally, the author observed high consistency in the readings of the ultrasonic sensor, as evident from continuous sensor reading test results. Furthermore, the receiver unit successfully displayed output according to the water level threshold for each condition. Additionally, the Blynk web and mobile dashboard were able to display output as per the design. However, we suggest adding data logging features and also solar panels as a renewable power source to support the improved prototype system.

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