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2024 International Conference on Applied Sciences and Material Applications, ICASMA 2024

作者： Qarinur, M. Silitonga, E.M.R. Alvan, S. Ogata, S. Kinoshita, N. Yasuhara, H. Civil Engineering Study Program Universitas Negeri Medan Medan20221 Indonesia Construction Management Study Program Universitas Negeri Medan Medan20221 Indonesia Division of Global Architecture Graduate School of Engineering Osaka University Osaka565-0871 Japan Department of Civil and Environmental Engineering Ehime University Matsuyama790-8577 Japan Department of Urban Management Kyoto University Kyoto615-8540 Japan

Geothermal reservoirs are significant sources of renewable energy. Accurate geometric modeling of these reservoirs is essential for understanding the distribution of heat and fluid dynamics within them. This study aims to develop a geometric model of the Sibayak geothermal field using borehole data. Borehole data provide detailed geological information, which is crucial for constructing a realistic geometric model. The methodology of this research involves several key steps: the collection of borehole data from the Sibayak geothermal field, the construction of a 3D geometric model of the reservoir using COMSOL Multiphysics based on the borehole data, and the validation of the model through comparison with field data and previous research findings. The results indicate that the developed geometric model successfully identifies zones with high geothermal potential and provides an accurate depiction of the reservoir's boundaries and characteristics. Modeling the geometry of geothermal reservoirs using borehole data offers profound insights into the internal dynamics of the reservoir and can serve as a valuable tool for planning and optimizing geothermal energy exploitation. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Geothermal fields

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SAEnet: An application for adjustment of horizontal network using particle swarm optimization algorithm 4

SAEnet: An application for adjustment of horizontal network ...

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4th Geomatics International Conference 2019, GeoICON 2019

作者： Hafid, A. Sari, D.N.I. Sobatnu, F. Study Program of DIII Geodesy Department of Civil Engineering Politeknik Negeri Banjarmasin Brigjen H. Hasan Basri St Banjarmasin Kayu Tangi70123 Indonesia

The horizontal network of control stations plays an important role in geometric measurement activities, such as determining positions of point, distance, area, or even volume. One of the methods of determining horizontal network values is the least squares method. The method of least squares is one of the most frequently used methods to obtain unique estimates for a set of redundant measurements. The equations that are used in the horizontal network surveys are the nonlinear equations so it must be linearized in order to be computed using least squares method. The problem that arises when linearizing the nonlinear observation equation is the approximate coordinates of the network stations are needed for its computations. In order to handle this problem, the Particle Swarm Optimization (PSO) algorithm is applied as an algorithm for determining the approximate coordinate values of the network stations. The algorithm of PSO is a heuristic function that optimizes a problem by iteratively trying to improve a candidate solution toward the best solutions. The advantages of PSO are that PSO is designed for solving a problem more quickly when classic methods are too slow and finding an approximate solution when classic methods fail to find any exact solution. This paper presents the design of an application for horizontal network adjustment using PSO algorithm, namely SAEnet. The Algorithm was written in Matlab which is very effective in matrix manipulation and has been widely used in various fields of numerical computations. The computation of horizontal network adjustment using SAEnet application consists of determination of initial approximation values using PSO and the adjustment computation using the least squares method. SAEnet is also equipped with save menu to Microsoft Excel format and load menu from Microsoft Excel format. The test shows that the input and output of the program can run as expected. The results are then compared to other program, like STAR∗NET, usin

关键词： Nonlinear equations

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Flood Management Strategies in Indonesia: A Lesson Learned from Pepe River, Central Java 5th

Flood Management Strategies in Indonesia: A Lesson Learned f...

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5th International Conference on Rehabilitation and Maintenance in civil engineering, ICRMCE 2021

作者： Prastica, Rian Mantasa Salve Wijayanti, Amalia Civil Engineering Department Gadjah Mada University Yogyakarta55281 Indonesia Water Infrastructure Construction Technology Study Program Public Works Polytechnic Semarang50275 Indonesia

ISBN: (纸本)9789811693472

Floods occur every year and threaten communities worldwide. Indonesia is among the countries faced with this problem and still struggling to seek practical solutions to date. Further, as the country’s centers of trade, business, and technology, the island of Java cannot even perform better in dealing with floods. To further understand possible damage and losses, this research investigated structural mitigation measures as part of flood management in the Pepe River, notably river channelization to increase hydraulic efficiency. For the analysis, it used HEC-RAS to observe the river capacity. Existing conditions revealed that the river could not accommodate the predicted floods based on the return periods derived from the synthetic unit hydrograph of Nakayasu. However, after running the mitigation scenario wherein hydraulic modification was applied, flood risk could be reduced by lowering the river water level. Based on the results, it can be concluded that Indonesia needs to pay more attention to other aspects: ecology, green infrastructure, and water governance, to achieve more effective flood mitigation measures because structural mitigation only provides a temporary solution. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Rivers

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Measurement analysis of the level of household preparedness for facing landslide in Bogor regency 2

Measurement analysis of the level of household preparedness ...

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2nd International Conference on Disaster and Management 2020, ICDM 2020

作者： Saputra, P.D. Rahmawati, C. Purnomo, K.S.H. Larosa, E. Nurhasanah Military Building Construction Engineering Study Program Faculty of Military Engineering Indonesia Defense University Bogor Indonesia Industrial Engineering Department Faculty of Industrial Technology Universitas Dirgantara Marsekal Suryadarma Jakarta Indonesia Master of Management Program Universitas Teknologi Yogyakarta Yogyakarta Indonesia Mechanical Engineering Education Faculty of Teacher Training and Education Universitas Negeri Yogyakarta Yogyakarta Indonesia Civil Engineering Study Program School of Engineering and Technology Tanri Abeng University Jakarta Indonesia

There are so many areas in Indonesia that are prone to landslides. Bogor is the regency with the most frequent landslides. Therefore, high community preparedness is needed to deal with the landslide, especially at the household level because it is the spearhead of preparedness and influence disaster risk. The objective of this research is to measure and analyze the level of household preparedness for facing landslide. The location of this research is in Cibadak Village, Bogor regency where a landslide disaster had happened. This is a quantitative research. The number of the samples were 100 household. Data collection was done by surveying samples and distributing questionnaires. The data would be analyzed with descriptive analysis, and the results of level of household preparedness would be categorized to five levels which were very prepared (80-100), prepared (65-79), almost prepared (55-64), less prepared (40-54), and not prepared (0-39). The results of the research are the average index value of Knowledge and Attitude (KA) parameter is 66.77, Emergency Planning (EP) parameter is 52.24, Warning System (WS) parameter is 64.80, Resources Mobilization Capacity (RMC) parameter is 51.25 and the level of household preparedness for facing landslide is 59.26 or and it is significant at the almost prepared level. © Published under licence by IOP Publishing Ltd.

关键词： Landslides

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Calibration of base saturation flow rate at pretimed signal intersection utilizing Bayesian linear regression considering morning and evening peak hour observations 5

Calibration of base saturation flow rate at pretimed signal ...

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5th Aceh International Symposium on civil engineering 2024, AISCE 2024

作者： Lulusi, L. Sugiarto, S. Saleh, S.M. Isya, M. Doctor of Engineering Program Study Universitas Syiah Kuala Banda Aceh Indonesia Department of Civil Engineering Universitas Syiah Kuala Banda Aceh Indonesia Universitas Syiah Kuala Banda Aceh Indonesia

Base saturation flow is a critical constraint used for evaluating the capacity of signalized intersections. The Indonesian Highway Capacity Manual (IHCM, 2023) is frequently used for signalized intersection planning in Indonesia. In heterogeneous traffic environments, the driver characteristics and behaviors exhibit significant variations. However, the base saturation flow was also influenced by traffic volume during the observation period. This study modeled the base saturation flow by analyzing differences in morning and afternoon peak hour data. The objective was to examine the base saturation flow at pretimed signal in Banda Aceh, with a focus on traffic volume fluctuations during peak hours. Four intersections were investigated in this study. Unmanned aerial vehicles were employed to record discharge flow pattern within targeted signalized intersection. Manual timing was conducted using stopwatches and geometric road data were collected through direct field measurements. Bayesian linear regression with a Gibbs sampling approach was utilized to recalibrate the saturation flow rate coefficients. The base saturation flow during the morning peak is 284 We, while in the afternoon peak, it is 285 We, with We representing the effective intersection approach. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Unmanned aerial vehicles (UAV)

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The implementation of teaching factory in producing fly ash based eco-friendly concrete products 2

The implementation of teaching factory in producing fly ash ...

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2nd International Conference on Technology and Vocational Teachers, ICTVT 2018

作者： Inderawan, N.A. Widodo, S. Pascasarjana Yogyakarta State University Caturtunggal Depok Sleman Yogyakarta55281 Indonesia Study Program of Civil Engineering and Planning Education Faculty of Engineering Yogyakarta State University Caturtunggal Depok Sleman55281 Indonesia

This literature study aimed to describe eco-friendly solutions for developing teaching factory models in vocational high schools by using Fly Ash wastes as cemet replacement materials. The need for eco-friendly concrete has become an innovation which is able to reduce the impacts of environmental pollutions and the concrete product has better quality than conventional concrete. Vocational High Schools in Indonesia have good potential to apply this idea by using teaching factory model for producing eco-friendly concrete because of multiple benefits: (1) reducing the amounts of fly ash wastes;(2) the result of this model is a good quality concrete product that gives benefit to society;(3) providing the understanding of Greening TVET to vocational high students;(4) students deepen their competencies by adapting Greening TVET;(5) also growing good cooperation between steam electricity power plant, vocational school, industry in the field of eco-friendly concrete, and market needs. This study reviewed the various studies about the characteristics and optimum mix design of fly ash as material mixture and teaching factory model. The result of study are idea and design of teaching factory model in Vocational High School by using fly ash as cement replacement of concrete mix design. © Published under licence by IOP Publishing Ltd.

关键词： Fly ash

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Implementation of Dama Mandala Application in Realizing Smart City Vision in Denpasar City

Implementation of Dama Mandala Application in Realizing Smar...

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International Conference on Smart Computing & Communications (ICSCC)

作者： Dewa Ayu Trisna Adhiswari Wedagama Decky Cipta Indrashwara I Gusti Agung Ananda Putra Environmental Engineering Study Program Universitas Pendidikan Nasional Denpasar Indonesia Civil Engineering Study Program Universitas Pendidikan Nasional Denpasar Indonesia

ISBN: (数字)9798350363104

ISBN: (纸本)9798350363111

The incorporation of information and communication technology (ICT) to improve infrastructure and establish a efficient and responsive environment is a key element of Denpasar Citys ambition to evolve into a Smart City. This research delves into the utilization of E Government, via the Dama Mandala app underscoring its significance in this transition. Through surveys and interviews employing a methodology the study demonstrates that the Dama Mandala app has greatly enriched the lives of Denpasar Citys inhabitants by granting them access to government services and information online. These results imply that the app plays a role, in realizing Denpasar Citys aspiration of becoming a culture oriented Smart City advancing towards the vision of Denpasar Maju.

关键词： Surveys Knowledge engineering Technological innovation Irrigation Smart cities Navigation Roads Government Information and communication technology Stakeholders

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Biogas Production in the Anaerobic Digestion of Paper Sludge

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APCBEE Procedia 2014年 9卷 65-69页

作者： Cindy Priadi Dwica Wulandari Iftita Rahmatika Setyo Sarwanto Moersidik Environmental Engineering Study Program Civil Engineering Department Engineering Faculty Universitas Indonesia Kampus UI Depok 16424 Indonesia

Pulp and paper industry generates large quantity of sludge, up to 1 m 3 /ton paper produced. Anaerobic digestion (AD) is a potential treatment to stabilize sludge and produce biogas for renewable energy. The aim of this study was to investigate the potential of AD of paper sludge (PS) generated from primary and secondary wastewater treatment and to compare the effect of cow manure to paper sludge. For the reactor with PS only, biogas production was observed starting on the 5 th day with 6.3% of methane with a steady increase. The cumulative methane yield attained to 14.7 ml/g volatile solid (VS) until day 28. The second reactor containing PS and cow manure produced methane 269 ml/g VS until day 28. This study shows a more optimal AD process of paper sludge mixed with cow manure due to a more optimum C/N ratio and also higher VS.

关键词： Clean Production Wastewater Kinetics Lab-Scale

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Health-associated Cost of Urban Informal Industrial Sector: An Assessment Tool

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Procedia - Social and Behavioral Sciences 2012年 36卷 112-122页

作者： Anindrya Nastiti Indrawan Prabaharyaka Dwina Roosmini Tresna Dermawan Kunaefi Study Program of Environmental Engineering Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Jalan Ganeca 10 Bandung 40132 Indonesia

Marginalized urban migrants thrive in informal economy, where health and safety are often neglected. Findings on previous studies have listed several informal characteristics; occupational injuries and diseases in informal setting; and components of health expenditure. This paper attempts to assess health-associated cost in informal industry through questionnaire containing basic information of respondent and household members, economic and occupational assessment. Different types of jobs surveyed, target population, biases from occupational/non-occupational cost and household/individual expenditure, and validation method are challenges that must be addressed. This paper serves as policy-tool reference to improve the well-being of informal workers by improving nationwide workforce survey.

关键词： Urban informal sector occupational health and safety health expenditure

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The Implementation of Centrifugal Force in the Geometric Design of Road for Safety Driving Convenience on the Cisarua sta.0+050-1+450

The Implementation of Centrifugal Force in the Geometric Des...

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STEM Education Conference (iSTEM-Ed), International

作者： Juang Akbardin Dadang Mohamad AsepYudhi P Eky Aprian Civil Engineering Study Program Universitas Pendidikan Indonesia Bandung Indonesia Arcitehture Study Program Universitas Pendidikan Indonesia Bandung Indonesia

ISBN: (数字)9798350365979

ISBN: (纸本)9798350365986

The road of Cisarua - Ngamprah has winding conditions and can result in accidents from a geometric perspective. Some of the reasons are because the radius, visibility, and pavement widening at bends have inappropriate road slopes. This research aims implementation of centrifugal force in the geometric design of road for safety driving Conveniencet at the Cisarua sta. 0+050 -1+450. This research method uses evaluative and quantitative methods. Data collection is carried out by observing road locations and the agencies responsible for completing geometric traffic data. Data analysis was carried out on centrifugal strength calculation, the highway gradient, arch sharpness calculation, and centrifugal forces implementation on road bends. These actions are lumped through plunging the aftereffect of greater centrifugal force strength. Moreover, this implementation is also able to reduce the chance of accidents due to centrifugal force impacts based on road geometry calculations. Based on the evaluation and implementation of a smaller centrifugal force design, the use of a spiral-circle-spiral bend type with a transition curve can increase safety driving comfort.

关键词： Geometry Data analysis Roads Force Windings Education Data collection

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