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
311 Documents
<![CDATA[Performance of Water Pump on Distribution and Transmission Process using Variable Speed Drive ]]>
<![CDATA[Dwi Oktavianto Wahyu Nugroho]]>;
<![CDATA[Totok Soehartanto]]>;
<![CDATA[Tahta Anugrah Wibowo]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 6 No. 1 (2020) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23378557.v6i2.a7248
<![CDATA[The Pump is the vital component in the transmission of water from one unit to another or the distribution water from booster unit to customer. Water pumping has become ineffective due to incorrect installation of the installed pump not in accordance with the pre-installed piping. Investing in network development in the coming year is sometimes one of the reasons why pumps are installed improperly. Thus, high pressure pumps are sometimes installed at lower pipeline pressure. This condition usually does not only double between the pressure in the pipe and pump. Classically, pump output lines are usually coupled with valves (usually butterfly or rotary valves) to provide conditions that correspond to the pump's datasheet. Meanwhile, the classical concept will decrease the lifetime of pump, so the Variable Speed Drive (VSD) becomes the solution. TawangSari, SiwalanPanji, and KedungUling units are picture how VSD can fix kind of problem that faced in classical system. Worst energy use and decreased performance in classical system cause by wrong installation and limitation of supply power are solved by adapting frequency produced by VSD as it needed.]]>
<![CDATA[Modelling of Payout Ratio: A Panel Regression Analysis for Indonesian Listed Bank ]]>
<![CDATA[Rizka Widya Permatasari]]>;
<![CDATA[Lucia Aridinanti]]>;
<![CDATA[Noviyanti Santoso]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 6 No. 1 (2020) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23378557.v6i2.a7211
<![CDATA[The Indonesian economy is a bank-based economy, where the economy relies on the existence of the banking sector as a source of financing, so a healthy and efficient banking system is the key to success in the sustainability of national economic development. The company's financial performance can be improved by going public. In companies that go public, dividends are one of the motivations of investors to invest their funds in the capital market, because it is a form of return on investor investment and an increase in wealth. The purpose of this study is determining the best model of the dividend payout ratio (DPR) in the banking sector by predictor variables such as ROI, DER, ROE, PER, and CAR using panel regression analysis. Based on the results of the analysis it was concluded that the factors that influenced the banking sector DPR were ROI and CAR with a good model of 86,7%.]]>
<![CDATA[Monitoring and Analysis of Single Tube Temperature Distribution in Heat Exchanger Simulator Using TPA 81 Thermopile Array ]]>
<![CDATA[Murry Raditya]]>;
<![CDATA[Gunawan Nugroho]]>;
<![CDATA[Abdurrahman Rahyang Tutuko]]>;
<![CDATA[Halen Dinata Atmaja]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 6 No. 1 (2020) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23378557.v6i2.a7246
<![CDATA[The Energy and Environmental Engineering Laboratory had a heat exchanger simulator which was used to determine the temperature changes with respect to time due to air velocity. This simulator used tubes which were used to find out the temperature change with time. The working principle of this simulator was to monitor changes in temperature on the tube that had been preheated and then cooled using a fan contained in the simulator. This study performed temperature measurements using a TPA81 thermal array sensor. We chose this sensor because it could measure the temperature without touching the object and had 8 pixels for image measurement. This was because the process of reducing the temperature of the tube becomes purely caused by the fan and not from the outside environment. The results obtained from this study were visualization of temperature distribution using the Thermal Array TPA81 sensor, having a linearity value of 0.034%, a precision value of the instrument of 98.1%, an accuracy value of 0.285%, and error value of 0.154 (W/m2K). For the analysis of temperature distribution, it was concluded that the value of the temperature did not affect the value h, because the value of h (the coefficient of heat transfer convection) is distributed with time.]]>
<![CDATA[Analysis of Container Problems in Exception Area at PT. Terminal Petikemas Surabaya uses the Lean Six Sigma Method ]]>
<![CDATA[Vivi Mentari Dewi]]>;
<![CDATA[Iis Dewi Ratih]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 6 No. 3 (2020) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23378557.v6i3.a7445
<![CDATA[PT Terminal Petikemas Surabaya is a company engaged in logistics, container services. Since the end of December 2019, PT Terminal Petikemas Surabaya began implementing a gate automation system at gate in exports. One thing that is done to support the gate automation is the Exception Area which is used as a data repair place for trucks that experience problems during the gate-in export process before heading to the stacking field. Containers that are constrained during the gate-in process indicate that there are procedural errors carried out by internal companies and external parties, such as drivers, forwarders, and importers related to administrative and technical problems. This research focuses on controlling the quality of container problems that enter the exception area by using a statistical method in the form of lean six sigma. The purpose of this study is to determine the average length of time to resolve containers for each problem, to know the quality of and the sigma level of the average length of time to resolve containers that enter the Exception Area based on the average number of container problems entering the Exception Area according to five problem criteria, knowing the problems that cause themost of the containers that enter the Exception Area. The results of the analysis in this study are the average length of time for containers that enter the Exception Area for each problem as a whole, the highest is caused by the system and the lowest is due to the closing time. The average number of container problems that enter the Exception Area in accordance with the five criteria, the problem has been controlled statistically with the most problem causes caused by the system, and the sigma level value is obtained from the average number of container problems that enter the Exception Area according to the five problem criteria which is 3,395, which means the variation or diversity of container problems that enter the exception area based on the problems of the containers that enter the Exception Area according to the five criteria, the problem is quite large.]]>
<![CDATA[21 Bar Yoshimin Boiler Maintenance with Controlling Residual Phosphate ]]>
<![CDATA[Agung Subyakto]]>;
<![CDATA[Afan Hamzah]]>;
<![CDATA[Agus Surono]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 6 No. 3 (2020) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23378557.v6i3.a8117
<![CDATA[Boiler as the steam generator is usually utilized as a turbine drive and other industrial processes. Boiler needs good treatment and surveillance to keep its best performance. Boiler water (BW) and boiler feed water (BFW) quality control is essential in boiler maintenance since it preserves boiler from crust, corrosion, and carry over, moreover, it also prevents boiler pipe to break. Boiler maintenance in sugar refinery factory is carried out by controlling the quality of BFW, Chemical injection (inner maintenance) and blowdown of boiler water. BFW mineral content (SiO2 , total hardness) is maintained as small as possible using a softener (cation resin) or demineralization unit (cation and anion resin). Chemical injection is performed by the addition of soda in order to control the pH of boiler water. Phosphate addition aims to tie up total hardness level which is caused by concentration process of water boiler and slipped of hard water from BFW. Blowdown process has purpose to reduce crust and corrosion caused by mineral concentrate inside boiler. The experiment was conducted by controlling pH of BFW from 7.5-8.5, maximum total hardness at 3 ppm, maximum SiO2 concentration at 3 ppm and maximum Total Dissolve Solid (TDS) at 100 ppm while BW was controlled its pH at 10.5-11, maximum total hardness at 20 ppm, maximum SiO2 concentration at 50 ppm, maximum Total Dissolve Solid (TDS) at 2000 ppm, and residual phosphate ion between 4 – 10 ppm. The experiment time was adjusted as a milled day or about for 140 days. The result of the experiment showed that the treatment had a good impact on the condition of the boiler drum pipe.]]>
<![CDATA[Financial Ratio Analysis in DU PONT SYSTEM to Measure Financial Performance PT. Terminal Teluk Lamong ]]>
<![CDATA[Fittrofin Amalia Farisa]]>;
<![CDATA[Iis Dewi Ratih]]>;
<![CDATA[Niluh Shanthi Sekarini]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 6 No. 3 (2020) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23378557.v6i3.a7458
<![CDATA[Companies are defined as organizational units that use various factors of production and produce goods and services to be sold to households, other companies or the government in a profit-oriented manner. In this global era, competition among actors is increasingly competitive. In this research will be conducted to measure the company's financial performance using ratio analysis in the DuPont System at PT. Teluk Lamong Surabaya Terminal in the period 2016 to 2018. The DuPont System can identify the cause of the inefficiency of a company based on its financial statements. The purpose of this financial ratio analysis is to see and evaluate the company's current and future financial condition. This study aims to determine the results of financial performance at the company PT. Teluk Lamong Surabaya Terminal in the period 2016 to 2018.]]>
<![CDATA[Automated Pet Feeder Called Smart Pakan using 3D Printer with Open Source Control System ]]>
<![CDATA[Rizaldy Hakim Ash Shiddieqy]]>;
<![CDATA[Bayu Adhi Saputro]]>;
<![CDATA[Fatan Odhi Dandha]]>;
<![CDATA[Liza Rusdiyana]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 6 No. 3 (2020) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23378557.v6i3.a7896
<![CDATA[In this paper, an automatic pet feeding machine is built using the 3D Printer machine and an opened source control system to help people with busy activities to be able to feed their pets on time. The machine is built using 3D Printer machine. The control system is built using the NodeMCU ESP8266 platform module and ultrasonic sensors. The controlling device uses a smartphone that is installed blynk application software that has the principle of the Internet of Things. The machine works by opening it’s valve to control the water’s discharge, a servo motor to open the feed container, as well as a timer to regulate the time of feeding. The valve can be set in 4 conditions. There are 10 degrees, 20 degrees, 30 degrees and up to 40 degrees. Then for the feed distance’s display it will provide information about the distance of the feed to the sensor, for a maximum distance of 9 cm in accordance with the distance sensor attached to the roof of the feed container with the sensor attached to the bottom of it. This machine can work continuously and automatically as long as there is an electricity source in the house and the owner holds the control of the blynk application software on their phone.]]>
<![CDATA[Satisfaction and Loyalty of Banking Customers in Indonesia ]]>
<![CDATA[Nur Azizah]]>;
<![CDATA[Harry Puspito]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 6 No. 3 (2020) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23378557.v6i3.a7654
<![CDATA[Improved customer satisfaction and loyalty are essential metrics in increasing a company's revenue and profit in the banking industry. This research aims to determine the effect of satisfaction on loyalty among bank customers in Indonesia. The study was conducted by face to face interview method (F2F) among 1910 bank customers in eight metropolis in Indonesia (2019). The sampling method used a random sampling followed by a booster sampling approach. The analysis was conducted using the Structural Equation Modeling (SEM) by WarpPLS approach. The results show that satisfaction positively and very significantly affects loyalty.]]>
<![CDATA[Development of ECU (Electronic Control Unit) to Maintain Stability of Biogas Fuelled Generator ]]>
<![CDATA[Totok Soehartanto]]>;
<![CDATA[Dwi Nur Fitriyanah]]>;
<![CDATA[Putri Yeni Aisyah]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 6 No. 3 (2020) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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<![CDATA[Biogas fueled generator has a unique character because the converter kit on the generator has the characteristic of absorbing the biogas supply. Therefore, in this study, biogas is accommodated in a plastic container equipped with a valve that can adjust the amount of biogas supply pressure. Combustion in the Genset combustion chamber will occur if the ratio of air supply and supply of biogas (AFR = Air to Fuel Ratio) meets the stoichiometric number. So a ratio control is needed on air supply and biogas supply, which can follow changes in biogas conditions in plastic bags and generator loads. For this reason, this paper presents an ECU (Electronic Control Unit) that can regulate the ratio of air supply to biogas supply by using a servo motor valve, which is commanded by a control signal from the ECU. The resulting ECU prototype is equipped with a multi-input connector (to receive the signal output of CH4 methane gas sensor and the biogas supply pressure sensor), multi-output (control signal to the servo motor valve), and multi regulators to adjust the Set Point value for the methane gas content CH4, the value of the set point of the biogas supply pressure and to tune the value of the proportional gain control (KP). The results of the ECU performance test by trial and error by giving a dummy input signal (analogy to the signal output of methane gas sensor and the analog of the pressure sensor output signal in the form of an electric voltage generated from the signal generator) can drive the servo motor, valve air supply, and servo motor, valve supply biogas. Accordance with the gain control input from the regulator.]]>
<![CDATA[DESIGN OF SOLAR TRACKER SYSTEM USING PHOTOTRANSISTOR ]]>
<![CDATA[Ahmad Fauzan Adziimaa]]>;
<![CDATA[Detak Yan Pratama]]>;
<![CDATA[Nabila Widad Dira Sinatrya]]>;
<![CDATA[Dewi Sugihartati]]>;
<![CDATA[Wahyu Nur Handayani]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 7 No. 1 (2021) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j23378557.v7i1.a7247
<![CDATA[Intensity of the sun be an important parameter to determine the potential energy in any region. Nowdays, measurement of solar intensity as a panel solar tracker use many variety of sensors. Phototransistor is one of the light sensors that has a greater light sensitivity compared to other light sensors. The design of the system uses four phototransistor which are placed each of two sensors in the east and west of the panel. Accuracy testing calculated by comparing the measurement results on sensor circuit with Lux Meter as validator. The results have shown that the average of phototransistor error is 1.24% and 1.27% on the east side phototransistor and 0.47% and 0.93% on the west side phototransistor.]]>
