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Electronic and Electrical engineering and Intelligent System (ICE3IS), International Conference on

作者： Teddy Nurcahyadi Christian Blum Mechanical Engineering Study Program Engineering Faculty Universitas Muhammadiyah Yogyakarta Yogyakarta Indonesia Institut d'Investigació en Intel·ligència Artificial Consejo Superior de Investigaciones Científicas Barcelona Spain

ISBN: (数字)9798350378368

ISBN: (纸本)9798350378375

Job shop scheduling methods are among the earliest optimization techniques that have been well-studied since 1950s. This fact reflects the prevalence of job shop scheduling problems in our daily lives, and hence, the importance of methods and tools needed to solve them. Human civilization has been evolving rapidly in the last several decades, presenting more difficult scheduling problems and the need to solve them efficiently. This article assesses the existing problems and optimization techniques in job shop scheduling. Furthermore, current and future challenges in this area are highlighted.

关键词： Electrical engineering Job shop scheduling Metaheuristics Production Human factors Market research Deep reinforcement learning Dispatching Intelligent systems

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Pentapod: A New Type of Concrete Armor for Coastal Protection

SSRN

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SSRN 2024年

作者： Natakusumah, Dantje Kardana Achiari, Hendra Nugroho, Eka Oktariyanto Hidayatulloh, Syarif Ishakputra, Jonathan Angelo Adinata, Fitra Expertise Group in Water Resources Engineering Faculty of Civil and Environmental Engineering Institut Teknologi Bandung FCEE ITB Indonesia Marine Engineering Study Program FCEE ITB United Kingdom Institut Teknologi Bandung Indonesia PT. Sapta Ahi Pratama Indonesia

This paper explores PentaPod, an invention in concrete armor units developed to protect coastal areas from damage caused by waves and currents. Until now, there hasn't been an armor unit intentionally designed to enhance its stability through connections with neighboring units. PentaPod provides a novel perspective, suggesting that the stability of armor units can be significantly improved not only by having substantial weight and effective interlocking but also by securely connecting them to each other. With this in mind, PentaPod concrete armor can be installed in a random or regular manner without the need for fasteners. Alternatively, it can also be installed regularly in layers with fasteners. Compared to conventional concrete armor installations, the overall stability of structures is significantly improved with interconnected PentaPod, either partially or entirely. In this paper, the results of testing the Stability Coefficient (Kd) for two variations of armor, namely PentaCone and PentaOcta, tested in a Wave Tank are also presented. The objective of this testing is to ascertain the stability coefficient for both variations of armor when installed randomly or regularly without any tying involved. The PentaPod arrangement allows for the implementation of both Grey Protection (using concrete armor) and Green Protection (conservation of mangrove areas) simultaneously, showcasing its versatility and integrated approach to coastal protection. © 2024, The Authors. All rights reserved.

关键词： Armor

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Aerobic-pond Palm Oil Mill Effluent (POME) utilization as growth medium of Scenedesmus obliquus for lipid production 5

Aerobic-pond Palm Oil Mill Effluent (POME) utilization as gr...

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5th International Seminar on Sustainable Urban Development, ISoSUD 2020

作者： Situmeang, C.A. Sianturi, R. Lestari, Y. Martgrita, M.M. Bioprocess Engineering Study Program Faculty of Biotechnology Institut Teknologi Del Laguboti Toba Samosir North Sumatera22381 Indonesia

The purpose of this research is to know the growth rate and biomass production of Scenedesmus obliquus in palm oil mill effluent (POME) medium taken from aerobic pond and to know the lipid concentration produced by S. obliquus. In this research, S. obliquus was cultured in various POME concentration, those were 20, 60, 80, 90, 95, and 100% v/v, while the concentration of inoculum was 30% v/v, and fatty acid content was analysed by gas chromatography. The results revealed that growth rate was decrease with the increasing concentration of POME (0.3545, 0.1792, 0.1566, 0.1268, 0.1158, and 0.1008/day), dry biomass weight was increase with the increasing concentration of POME (0.40, 1.20, 1.30, 1.77, 2.28, and 2.45 g/L), and lipid content also tended to increase with the increasing concentration of POME (13.10%, 36.59%, 36.65%, 50.37%, 60.40%, and 64.98%). Oleic acid and behenic acid were the dominant fatty acid content in S. obliquus lipid cultured in 100% concentration POME media. It is concluded that aerobic-pond POME can be utilized as growth medium for S. obliquus with a high lipid content. © Published under licence by IOP Publishing Ltd.

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Interior design study of lecturer rooms at E12 building 2ndfloor UNNES-learn from COVID-19 pandemic 9

Interior design study of lecturer rooms at E12 building 2ndf...

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9th engineering International Conference, EIC 2020

作者： Purnomo, A. Study Program of Architecture Department of Civil Engineering Faculty of Engineering Universitas Negeri Semarang Kampus Sekaran Building E4 Gunungpati Semarang50229 Indonesia

The covid-19 pandemic case has changed the structure of life in all aspects throughout the world. The field of man-made environment or architecture is no exception. The interior arrangement of a building, as part of the man-made environment, is also affected. The interior design of a building today seems to be obliged to participate in following the standards of new health-protocols in the new normal *** about the interior of the building that has already been utilized? Of course it requires further study to find out whether the interior of a building can be said to be healthy or not. This study aims to examine the interior design of the lecturer room E12 building 2nd floor UNNES in terms of health that is emphasized from the behavior of its users by referring to the situation of the covid-19 pandemic and its future prospects. The research method used is by field observations to search visual data, observing user behavior and textual data. Those who are categorized as users of the lecturer room E12 building 2nd floor UNNES are lecturers from the Department of Architecture, students, administrators and guests. The results of this study indicate that based on the pattern of user behavior and associated with the standard requirements of space, area, volume of space, material and infrastructure conditions, interior design of lecturer room E12 building 2nd floor UNNES, is included in healthy category, although there are several minor corrections that can be included as suggestions for improvement in order to adjust to the new normal era during the covid-19 pandemic period and thereafter. © Published under licence by IOP Publishing Ltd.

关键词： Floors

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The impact of land-use change on Cengklik Reservoir's sedimentation rate 7

The impact of land-use change on Cengklik Reservoir's sedime...

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7th International Conference on engineering, Technology, and Industrial Application, ICETIA 2020

作者： Pudyastuti, Purwanti Sri Yakan, Annisa Fathi Abdurrosyid, Jaji Budinetro, Hermono S. Civil Engineering Study Program Faculty of Engineering Universitas Muhammadiyah Surakarta Jl. A. Yani Tromol Pos I Pabelan Kartasura Surakarta57102 Indonesia

The Cengklik Reservoir is operated for irrigation of rice fields in 3 sub-districts in Boyolali Regency, namely Sambi, Ngemplak, and Nogosari. At the present time, the volume of the Cengklik Reservoir has decreased and resulted in dryness during the dry season. One of the main causes is due to the high sedimentation rate. This research was conducted to evaluate changes in land use that resulted in sedimentation in the Cengklik Reservoir. Erosion prediction in this study uses USLE (Universal Soil Loss Equation) analysis. The amount of sediment obtained uses the standard erosion data from USLE calculations, namely by multiplying the amount of erosion by the SDR and the area of River Basin. The potential for erosion and sedimentation used land use data for 10 years, from 2009 to 2019. Based on the research, the amount of erosion and sedimentation in the Cengklik Reservoir was fluctuated with the highest amount occurring in 2016, with erosion of 9,292 tones/ha/year and sedimentation of 4304,154 tons/year. In general, erosion and sedimentation have increased from 2009 to 2019. The classification of erosion in the Cengklik Reservoir according to this study was categorized as light erosion. The trap efficiency used in this study was calculated using formulae based on the research of Heinemann (1981) using the Brune method for small reservoirs with an area of less than 0.5 km2. In general, based on this study, the Trap Efficiency in Cengklik Reservoir was 95.254%. © Published under licence by IOP Publishing Ltd.

关键词： Erosion

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An Investigation of Ultrashort Pulses Propagation in Atmospheric Turbulence of FSO Communications 9

An Investigation of Ultrashort Pulses Propagation in Atmosph...

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9th International Conference on Electrical engineering, Computer Science and informatics, EECSI 2022

作者： Darusalam, Ucuk Priambodo, Purnomo Sidi Universitas Nasional Informatics Study Program Universitas Siber Asia of IEEE Photonics Society Informatics Faculty of Information and Communications Technology Jakarta Indonesia Universitas Indonesia IEEE Photonics Society Faculty Engineering Department of Electrical Engineering Depok Indonesia

ISBN: (数字)9786239213565

ISBN: (纸本)9781665470438

The atmospheric turbulence as the natural media of optical propagation for the free-space optical (FSO) communications is the great advantage to reach flexible connection and low-cost deployment but also is the major problem as well. Since, the phenomena of optical propagation in the atmosphere are random process, an optical signal is induced that produces severe effects to the performance. Thus, a method to reach best performance of FSO must be developed intensively to reduce the severe effects of atmospheric turbulence. One of the solutions to reduce those aforementioned effects is an ultrashort pulse implemented in FSO to modulate frequency carrier as the signal of optical propagation. In this paper, an investigation of an ultrashort pulse was performed through simulation. An ultrashort pulse has a great chance to be implemented in FSO since it has shorter width of pulse duration than a short pulse. An ultrashort pulse is generated using optical second harmonic pulse generator that produce a pulse at 50 fs of width. Based on the results of simulation, the ultrashort pulses showing better performance of FSO than short pulses have. © 2022 Institute of Advanced engineering and Science (IAES).

关键词： atmospheric turbulence free-space optical communications optical propagation optical scintillation temporal broadening turbulence effects ultrashort pulses

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Smart Home Gas Sensor Optimization Using Kalman Filter for Data Processing

Smart Home Gas Sensor Optimization Using Kalman Filter for D...

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International Conference on informatics and Computing (ICIC)

作者： Somantri Muhamad Ikhsan Thohir Alun Sujjada Deni Setiawan Ilham Komara Fikri Ardiansyah Efendi Muhamad Muslih Zubaile Bin Abdullah Mohd Zainuri Saringat Department of Software Engineering University Tun Hussein Onn Malaysia Informatics Engineering Study Program Nusa Putra University Sukabumi Indonesia Informatics Engineering Study Program Nusa Putra University Sukabumi Indonesia Department of Software Engineering University Tun Hussein Onn Malaysia Sukabumi Indonesia Department of Information System Nusa Putra University Sukabumi Indonesia Department of Software Engineering Faculty of Computer Science and Information Technology Universiti Tun Hussein Onn Malaysia Johor Bahru Malaysia

ISBN: (数字)9798331517601

ISBN: (纸本)9798331517618

The integration of Internet of Things (IoT) technologies into modern homes has enhanced safety and comfort, particularly in detecting gas leaks, which pose serious fire hazards. Gas leaks can often be detected by smell, but this method fails when no one is present. Previous research using microcontrollers and sensors to detect gas leaks faced challenges with accuracy due to noise interference. This paper proposes the use of a Kalman filter, developed by Rudolf Emil Kalman in 1960, to improve gas leak detection accuracy by filtering out noise. The system comprises an Arduino Nano, ESP8266 WiFi module, MQ-2 gas sensor, buzzer, and ThingSpeak cloud platform. By applying the Kalman filter, noise and data oscillations are reduced, enhancing detection accuracy. Experimental results show the system effectively detects gas leaks, provides real-time data, and triggers alarms. Future improvements could include additional sensors and features to further increase the system’s reliability and functionality.

关键词： Accuracy Noise Sensor phenomena and characterization Sensor systems Real-time systems Kalman filters Internet of Things Reliability Leak detection Gas detectors

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Analysis on Business Development and Pricing for Electric Vehicle Charging in Indonesia 3

Analysis on Business Development and Pricing for Electric Ve...

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2021 3rd International Conference on E-Business and E-Commerce engineering, EBEE 2021

作者： Santoso, Budi Wahyu Purwanto, Widodo Sustainable Energy System and Policy Research Cluster Universitas Indonesia Depok16424 Indonesia Energy System Engineering Study Program Faculty of Engineering Universitas Indonesia Depok16424 Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Indonesia Depok16424 Indonesia

ISBN: (纸本)9781450387392

Electric Vehicles (EVs) has important role in the successful of energy transition and reducing dependency from fossil fuels. Indonesia has started to develop EVs. One of the challenges is charging infrastructure development, includes business model and pricing scheme to achieve business feasibility. This study analyses business model and pricing mechanism for public charging station in Indonesia where a case study is conducted in Jabodetabek area. Monte-Carlo method is used to estimate charging demand based on current travel data and estimated EVs population in 2025. Cash flow method is used to calculate feasible price for public charging with Fixed and ToU price schemes. EVs home charging cost is also calculated to investigate competitiveness of public charging price for each business model. The results show that prices of public charging business model are competitive compared to cost of home charging. The proposed ToU price scheme for public charging is more competitive compared to fixed price scheme, and also effective to minimize grid load escalation of home charging during busy periods. Furthermore, daily cost of EV charging is calculated and compared to fuel cost of ICE vehicles. The result shows that EV charging cost is lower than fuel cost of ICE vehicles. © 2021 ACM.

关键词： Costs

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Exploring the Influence of Temperature on Sodium Titanate Mineral Formation Using X-Ray Diffraction 2

Exploring the Influence of Temperature on Sodium Titanate Mi...

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2nd International Conference on Physics and Applied Physics, ICP and AP 2023

作者： Noer, Zikri Sihombing, Yuan Alfinsyah Rajagukguk, Juniastel Idamayanti, Dewi Taufik, Dede Amri, Fauzan Agus, Muhammad Abduh Akram Department of Physics Faculty of Vocational Universitas Sumatera Utara Jl. Bioteknologi No. 2 Sumatera Utara Medan20155 Indonesia Department of Physics Faculty of Mathematics and Natural Sciences Universitas Sumatera Utara Jl. Bioteknologi No. 1 Sumatera Utara Medan20155 Indonesia Department of Physics Faculty of Mathematics and Natural Sciences Universitas Negeri Medan Medan Indonesia Advance Materials Engineering Study Program Department of Foundry Engineering Politeknik Manufaktur Bandung Bandung40135 Indonesia Center for Ceramics Ministry of Industry of Indonesia Jl. Achmad Yani No. 392 Jawa Barat Bandung40272 Indonesia Instrumentation and Control Engineering Technology Politeknik Negeri Indramayu Jawa Barat Indonesia

In this study, an inquiry was conducted to examine the influence of temperature on the crystal structure of sodium titanate (NTO). NTO was synthesized using NaCl, TTIP, citric acid, and ethylene glycol as precursors. The NaCl-citric acid precursor was dissolved in purified water, while the titanium precursor was prepared by blending ethylene glycol with TTIP. After vigorous stirring, the precursor solution was placed in a Teflon-coated stainless steel autoclave, subjected to preheating, and subsequently dried to form a gel. The gel underwent calcination at temperatures ranging from 800 to 1000 °C for 3 hours each. The resulting samples were rinsed with deionized water and dried to eliminate residual NaCl. Based on the results of XRD characterization, the NaTi4O8 phase experienced decomposition into rutile form when the calcination temperature was increased from 800-1000 °C and began to be identified as a rutile phase at a temperature of 900 °C. © Published under licence by IOP Publishing Ltd.

关键词： Sodium chloride

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IoT System for Floating Raft Hydroponics: Nutrient Monitoring and Automation 13

IoT System for Floating Raft Hydroponics: Nutrient Monitorin...

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13th International Physics Seminar 2024, IPS 2024

作者： Purwalaksana, A.Z. Wahyu, S. Ndari, W.E.W. Syah, S.A. Rismawati, E. Kusumadjati, A. Suharmanto, P. Department of Physics Universitas Negeri Jakarta Jl. Rawamangun Muka Jakarta13220 Indonesia Department of Physics Education Universitas Negeri Jakarta Jl. Rawamangun Muka Jakarta13220 Indonesia Physics Study Program Indonesia Defense University IPSC Sentul Area West Java16810 Indonesia Department of Industrial Engineering Faculty of Engineering and Computer Science Universitas Indraprasta PGRI Jl. Nangka Raya No.58 C Jakarta12530 Indonesia

The utilization of hydroponic cultivation in agriculture is increasing due to its high productivity even in limited spaces. However, in practice, monitoring and controlling nutrients in hydroponic systems often require intensive human supervision and intervention. This issue can be addressed through technological advancements, particularly with the adoption of microcontrollers, sensors, and the Internet of Things (IoT). Previous research has developed IoT-based monitoring and control systems for DFT hydroponics using the Blynk platform. This study aims to develop an IoT-based nutrient monitoring and automation system for floating raft hydroponics. Floating raft hydroponics was chosen for its simplicity, lower installation costs, and space optimization. The system developed in this study uses the HC-SR04 ultrasonic sensor with an average error of 1.229%, the DS18B20 water temperature sensor with an error of 0.415%, and the TDS sensor with an error of 2.055%. The sensor and actuator measurement data are presented via the Antares Web. This research has the potential to minimize the necessity for manual intervention in hydroponic systems, thereby enhancing both efficiency and consistency in nutrient delivery. © Published under licence by IOP Publishing Ltd.

关键词： Hydroponics

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