IPTEK The Journal of Engineering
IPTEK The Journal of Engineering (E-ISSN: 2337-8557) is an academic journal on the issued related to engineering and technology. IPTEK The Journal of Engineering published first time in August 2014. From 2014-2018 (Volume 1-4) IPTEK The Journal of Engineering publish three issues (numbers) annually (April, August, and December). Since 2019 published annually in April and August. It is open to all scientist, researchers, education practitioners, and other scholars. Therefore this journal welcomes various topics in different engineering disciplines. Our target is to reach all universities, research centers and institutes in the globe. Call for Papers IPTEK The Journal of Engineering is an open-access journal, which means that visitors all over the world could read, download, cite, and distribute papers published in this journal for free. We adopt a peer-review model, which insured fast publishing and convenient submission. In addition to peer-reviewed original research papers, the Editorial Board welcomes original research reports, state-of-the-art reviews and communications in the broadly defined field of engineering science and technology. Theses, dissertations, research papers, and reviews are all acceptable for publication. All topics should relevant to the issues faced by industries, governments, and communities. The broad-based topics may be covered by the following knowledge areas: Computer Engineering and Information Systems (Telematics, Algorithms and Programming, Network Based Computing, Smart Computing and Vision, Intelligent Information Management, Computer Architecture and Networking, Applied Modeling and Computing, Graphics Interaction and Games, Software engineering, Information Technology Infrastructure and Security, Information Systems Management, Data Engineering and Business Intelligence, Data Acquisition and Information Dissemination, Enterprise System, and Smart Cities and Cyber Security) Civil Infrastructure Engineering (Hydrotechnics and Surveying, Construction Implementation Management, Building Materials and Structures, and Transportation and Geotechnics) Mechanical Engineering (Energy Convertion, Metallurgical and Materials Engineering, Mechanical Design, and Manufacture) Electrical Engineering Automation (Cyber Physical, Automation, and Industrial Robots, Programmable Logic Controller and Control System, Antennas and Propagation, Instrumentation, Measurement and Power System Identification, Multimedia Telecommunications Network, Multimedia Communication, Electric Energy Conversion, Electric Power System Simulation, High voltage, System and Cybernetics, Microelectronics and Embedded Systems, Biocybernetics, Instrumentation and Biomedical Signal Processing, Multimedia Computing and Machine Intelligence, and Digital Signal Processing) Chemical Engineering (Applied Chemistry, Biochemical and Bioprocess, Advance Functional Materials and Analysis, Thermodynamic, Chemical Reaction, Material and Nanocomposite, Bioenergy, Wastewater Treatment, Process Integration, Fluid Mechanic, and Sustainable Industrial Systems) Instrumentation Engineering (Control Instrumentation, Measurement Instrumentation, Photonic Engineering, Vibration and Acoustics, and Embedded Systems and Physical Cyber) Business Statistics (Business Analytic, and Quality and Productivity Engineering) And physical, chemical, biological, and environmental sciences that are directly related to engineering.
Articles
144 Documents
<![CDATA[The Effect of Aeration on Aerobic Biofilter Using Polyethylene Terephthalate Media for Chicken Slaughterhouse Liquid Waste ]]>
<![CDATA[Agus Surono]]>;
<![CDATA[Suprapto Suprapto]]>;
<![CDATA[Ahmad Dwi Arga]]>;
<![CDATA[Aigah Ameilia Manullang]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 9, No 3 (2023) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v9i3.a18211
<![CDATA[Chicken Slaughterhouse is one of the industries that process live chickens into ready-to-eat chicken meat products. Many chicken slaughterhouses still need liquid waste treatment technology and directly discharge it into the aquatic environment. RPA liquid waste has a high organic content that will cause environmental pollution with unpleasant odors and decay. This study uses an aerobic wastewater treatment method by utilizing aerobic microorganisms in wastewater that are attached to biofilter media to form biofilms. This study aims to reduce the concentration of COD, BOD, TSS, and ammonia and change the pH value of RPA liquid waste with aerobic biofilter treatment using honeycomb media from Polyethylene Terephthalate and to get the best aeration flow rate to reduce the concentration of pollutants from the aerobic biofilter reactor. In this study, the residence time and the addition of air discharge in the aeration process are varied. The results of this study show that there has been a decrease in the concentration of COD, BOD, TSS, and ammonia and changes in pH values following PERMENLHK No 5 of 2014 concerning the quality standards of slaughterhouse wastewater with the best aeration flowrate recommendation is 15 liters/minute.]]>
<![CDATA[Role of Limestone Addition in Improving the Initial Compressive Strength of Geopolymer Concrete for Corrosive Environment Repair ]]>
<![CDATA[Cahyani, Arwinda Aribah]]>;
<![CDATA[Husin, Nur Ahmad]]>;
<![CDATA[Bayuaji, Ridho]]>;
<![CDATA[Tajunnisa, Yuyun]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 10, No 2 (2024) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v10i2.a20763
<![CDATA[Geopolymer Concrete (GC) is highly durable in corrosive environments, making it a viable material for repair. However, its initial compressive strength was below the 7 MPa required at 1-day age. Adding fine limestone (45 μm) can improve GC's density and early strength. This study explores the effects of adding 0, 3, 5, and 7% limestone and 1% sucrose superplasticizer to GC 16M. The compressive strength was tested at 1, 3, 7, and 28 days, along with slump, permeability, and resistivity tests to assess the durability. The results show that adding 5% limestone yields the optimal GC performance for repairing corrosive environments. The compressive strengths were 15.96, 28, 43, and 67.14 MPa at 3 days, 43 MPa at 7 days, and 67.14 MPa at 28 days, with a slump of 120 mm. The permeability and resistivity results were 0.128 E-16 m² and 57.87 kΩ-cm, indicating normal corrosion levels. These findings confirm that GC with 5% limestone meets the durability and strength requirements of repair materials in corrosive environments.]]>
<![CDATA[Shallot Price Forecasting in Three Locations in Indonesia Using Generalized Space-Time Autoregressive Model ]]>
<![CDATA[Wandira, Lidwina Galuh]]>;
<![CDATA[Prastuti, Mike]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 10, No 1 (2024) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v10i1.a17592
<![CDATA[Shallots are one of the commodities that have an important role for the economy in Indonesia. Many shallot farmers, especially in production center areas, depend for their economy on shallot farming. The price of shallots in Indonesia during 2010-2022 fluctuated quite a bit. This is because the demand for shallots tends to increase over time, while shallot production is seasonal, and the distribution is uneven. The fluctuation of shallot prices and the huge costs of shallot farming result in risk and uncertainty for farmers. The forecasting method used is Generalized Space-Time Autoregressive (GSTAR). The results of the best model for predicting shallot prices in three locations in Indonesia, namely Cirebon, Tegal, and Madiun based on RMSE values, namely the GSTAR (31)-I(1) model use inverse distance normalization weights. Forecasting results for the highest shallot prices in Cirebon, Tegal and Madiun occur in the first week of August 2022. Meanwhile the lowest shallot prices in Cirebon and Madiun occur in the fifth week of August 2022, however the lowest shallot prices in Tegal occur in the fourth week of August 2022. Shallot price movement patterns in Cirebon, Tegal, and Madiun for the next 14 periods will continue to fluctuate but tends to show a downward trend. This was caused by several regions entering the harvest season, resulting in a spike in yields at the same time. As a result, the yield of shallots in the three locations was abundant and caused the price of shallots to decrease. ]]>
<![CDATA[Designing a Supply Chain Visibility Information System for the Manufacturing Industry ]]>
<![CDATA[Liam Murphy]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 9, No 3 (2023) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v9i3.a17426
<![CDATA[This paper evaluates the design and success of an Information System developed in a just-in-time UK manufacturer to combat the lack of visibility and financial impact caused by supply chain disruptions related to extreme weather and traffic events. An information system design is first presented through the use of leading academic models, with a subsequent evaluation of perceived success via 4 employee interviews within the UK manufacturer. The DeLone and McLean model Multi-Perspective Evaluation model is then used to present the interviewees responses. This paper finds the newly introduced IS to be a partial success in meeting project objectives via the reduction of incident response time by 30 minutes per incident, and the centralization of key data points. This paper contributes to literature through the provision of framework and learnings for other organizations to build and act upon, in the aims of reducing their own supply chain disruption due to extreme weather and traffic events.]]>
<![CDATA[Positioning Control of Satellite Antenna for High Speed Response Performance ]]>
<![CDATA[Eze, Paulinus]]>;
<![CDATA[Obichere, Jude Kennedy]]>;
<![CDATA[Mbonu, Ekene Samuel]]>;
<![CDATA[Onojo, Ondoma James]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 10, No 2 (2024) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v10i2.a20670
<![CDATA[Dish antennas are essential elements in establishing communication between satellite and earth station. The response speed of the position control process of a dish antenna mounted on a moving vehicle that communicates via NigComSat-1R with a central control office is affected by round trip or time delay. Therefore, there is need to design a control system that will address this problem in order to achieve high speed positioning response. The mathematical models representing the dynamics of the antenna positioning system were obtained. A back propagation neural network (BPNN) based proportional integral and derivative (PID) controller was designed and added to the antenna position control loop. The resulting system was modelled in MATLAB. Simulation results indicated that it provided a rise time of 0.027 s, settling time of 1.06 s and overshoot of 0% at peak time of 0.06 s. This shows that the response speed of the control process using the designed BPNN-PID is 37 degree per second. Comparison with previous controllers applied to the same system indicated that BPNN-PID controller outperformed all of them. Generally, the BPNN-PID controller is suitable for high speed position control of the antenna and improves overall performance.]]>
<![CDATA[Design of an Integrated Temporary Storage for Hazardous and Toxic Material Wastes 4.0 Case Study in The Department of Industrial Chemical Engineering ]]>
<![CDATA[Rahmawati, Farida]]>;
<![CDATA[Purwodarmianto, Purwodarmianto]]>;
<![CDATA[Hariono, Slamet]]>;
<![CDATA[Dadang, Muhammad]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 10, No 1 (2024) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v10i1.a19252
<![CDATA[The Department of Industrial Chemical Engineering is one of the departments within the Faculty of Vocation at Institut Sepuluh Nopember Surabaya (ITS). It has four laboratories. The activities conducted in these laboratories, both in terms of practical work and research, generate hazardous and toxic waste that should be stored in a temporary waste storage facility. Temporary storage is crucial for safely containing hazardous and toxic Hazardous waste until it can be properly processed, disposed of, or transported to a permanent storage location. The primary goals of this facility are containment, separation, safety, and compliance with environmental regulations. The design and features of the facility play a crucial role in ensuring the effectiveness of temporary storage. Secondary containment structures, chemical compatibility measures, ventilation systems, safety protocols, and emergency response equipment are the primary components of this facility. These elements work together to prevent leaks, control chemical reactions, disperse hazardous vapours, maintain safety, and enable rapid emergency response. This research provides knowledge on the design of temporary storage facilities for hazardous and toxic materials, with technical specifications following regulations. Effective temporary storage management can protect human health and the environment and promote sustainable waste management practices.]]>
<![CDATA[Pressure and Flow Control System to Prevent Drinking Water Pipe Leaks ]]>
<![CDATA[Putri Yeni Aisyah]]>;
<![CDATA[Akhmad Ibnu Hija]]>;
<![CDATA[Ega Prawira Hadi]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 9, No 3 (2023) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v9i3.a16729
<![CDATA[The distribution of water through pipes experienced an average water loss of 35%. This is caused by a lack of pipe management, measurement tool management, and pressure management. In this study, a drinking water company miniplant was made using PVC pipe as a simulation to show the action of the solenoid valve as a pressure controller and water flow rate against leakage. This study monitors pressure differences and flow rates. Global valve acts as an actuator to control flow pressure while ball valve acts as an actuator to control flow rate. The results of the validation of the pressure sensor, on average the four sensors produce an accuracy of 99.587% and an inaccuracy of 0.413%. The results of the flow sensor validation, the average of the four sensors produces an accuracy of 97.558% and an inaccuracy of 2.442%. The results of system testing on the solenoid valve pressure control, work according to the set point in controlling pressure. The results of system testing on the solenoid valve pipe leakage control, work according to the set point in controlling pipe leakage but the ratio is high. The ratio is too high because the flow after the solenoid valve is getting slower, but the flow before the solenoid valve is still moving to fill the empty space in the pipe until there is no water flow.]]>
<![CDATA[Early Age Strength of Development Ultra High-Performance Concrete Using Class-F Fly Ash and Local Materials for Repair ]]>
<![CDATA[Paramitha, Kharisma Keysia]]>;
<![CDATA[Tajunnisa, Yuyun]]>;
<![CDATA[Pratiwi, Wiwik Dwi]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 10, No 2 (2024) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v10i2.a20764
<![CDATA[Ultra High-Performance Concrete (UHPC) is an innovative material for such repairs because of its superior mechanical properties, strength, crack resistance, and durability. However, its high production cost, primarily due to using materials like silica fume and cement, is a significant drawback. This study explores the feasibility of incorporating fly ash and local materials into UHPCs to reduce costs while maintaining or improving their performance. As a supplementary cementitious material, fly ash enhances the compressive strength and workability of UHPC. The addition of limestone further supports early-age strength and workability. By evaluating the mechanical properties and workability of modified UHPCs, this research demonstrates the economic viability and environmental benefits of structural repairs. The results indicate that this modification can effectively enhance the early-age strength of UHPC, making it suitable for use as a repair material. The evaluation of the mechanical properties and workability of the modified UHPC suggests that these alternative materials can maintain or even improve the performance of UHPC. Thus, this approach offers a more economically viable and environmentally friendly solution for structural repairs.]]>
<![CDATA[Technical Study of Ship Plate Firing Process Time with Variation of Deformation Values ]]>
<![CDATA[Widiyanto, Sinung]]>;
<![CDATA[Hardianto, Didik]]>;
<![CDATA[Kristiyono, Tri Agung]]>;
<![CDATA[Aditya, Bagus Kusuma]]>;
<![CDATA[Rifandi, Safriudin]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 10, No 1 (2024) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v10i1.a18594
<![CDATA[In the process of shipbuilding production and repair, deformation is sometimes encountered due to several factors, starting from load pressure, pulling, lifting, and welding processes. A fairing process is carried out to overcome the plate deformation, in which the plate is heated and cooled simultaneously. The method used in this research is direct time measurement during the fairing process on test plate specimens with variations in the depth of deformation curvature. The data obtained, processed, and analyzed to obtain an estimate of the fairing processing time the longer the fairing process takes, following the equation Y = 41.285X + 530.94, where X is the deformation angle, and Y is the estimation fairing processing time area per half square meter.]]>
<![CDATA[Image Processing and CFD Simulation Method Comparison in Determining and Visualizing Fluid Flow of a Marine UAV ]]>
<![CDATA[Sinung Widiyanto]]>;
<![CDATA[Gde A Prabhawatya Poundra]]>;
<![CDATA[Widyawasta Widyawasta]]>;
<![CDATA[Sayuti Syamsuar]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 9, No 3 (2023) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v9i3.a19215
<![CDATA[An investigation of marine UAV performance with various designs have done successfully. The analysis was based on resistance criteria identification both aerodynamically and hydrodynamic. The calculations were conducted with the assistance of image processing as the experimental attempt and High-Fidelity Computational Fluid Dynamics (CFD) software code to simulate the fluid flow on the fuselage designs, pontoons, and image processing. Both methods compared to acquire the silver line in which way they can collaborate to create new way of testing. Furthermore, mathematical calculations and Image processing works refereeing were also performed as the attempt for validations and conclusion]]>
