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[Prediction of Gas-Liquid Equilibria of CO2-K2CO3-MDEA-H2O System by Electrolyte UNIQUAC Model ]]>
<![CDATA[Saidah Altway]]>;
<![CDATA[Kuswandi]]>;
<![CDATA[Ali Altway]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 1 No. 1 (2014) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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<![CDATA[Carbon dioxide is an acid gas that can be harmful impurity especially in the chemical industry. Various processes have been developed to reduce the CO2 from the gas stream. Chemical absorption is the most economical method for CO2 separation. One of the processes that is widely used in industries is Benfield process with K2CO3 (potassium carbonate) as a solvent and amine as a promotor. In this study, MDEA (Methyldiethanolamine) is used as a promotor. As a reference for designing CO2 absorption/stripping packed column in industries, gas-liquid equilibrium data were required. The objective of this study is to predict the gas-liquid equilibria of CO2-K2CO3-MDEA-H2O system at 30oC and atmospheric pressure with 30% K2CO3 and variation of weight percent of MDEA 2, 5, 8, and 10%. The model used in this study is an electrolyte UNIQUAC. The simulation was conducted using Matlab programming. The deviation of predicted CO2 partial pressure with the experimental data is 14.85%. The energy interaction parameters of electrolyte UNIQUAC model were obtained from fitting with the experimental data by Least Square method. The results of this study represented that with increasing CO2 partial pressure, CO2 loading increased, and also at the same partial pressure of CO2, CO2 loading increased with the increase of weight percent of MDEA]]>
<![CDATA[Sensor Coordination for Behavior of Search Robot Using Simultaneous Localization and Mapping (SLAM) ]]>
<![CDATA[Indra Adji Sulistijono]]>;
<![CDATA[Endah Suryawati N.]]>;
<![CDATA[Eko Henfri B]]>;
<![CDATA[Ali Husein A]]>;
<![CDATA[Ananda Verdi S]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 2 No. 1 (2015) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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<![CDATA[We developed a robot for searching victims for survivors of natural disasters. Almost all robots need to navigate a state in the environment to help people around them, therefore the robot should have performance a mapping system. Thus improve the performance of robots in knowing the obstacles, the position and the direction toward the robot with the task of each sensor is to detect obstacles or objects that exist in the use of ultrasonic sensors to avoid bumping into obstacles, to detect the position and determine the distance of the robot using a rotary sensor encoder and to determine the direction toward, direction and elevation angle of the robot using IMU sensor. Whole of the sensor is set by the microcontroller STM32F407VGT6 that sent data from each sensor to a PC using XBee Pro. Therefore, robot create a mapping with OpenGL on the PC. Mapping system plays an important role for fast and accurate to the destination. We conclude, in the robot SLAM method depends on the precision of the data in the sensor US2 (Right), US4 (Left) and the rotary encoder. The test results of the output data at the right ultrasonic sensor produces error US2 16.9%, 14.6% US4 left ultrasonic and rotary encoder sensor error to 19.45%.]]>
<![CDATA[The Comparisson between LBP and SQI Methods in the Surface Roughness Measurement Using ESPI Method ]]>
<![CDATA[Mohammad Khoirul Effendi]]>;
<![CDATA[Agus Sigit Pramono]]>;
<![CDATA[Pandu Pratama]]>;
<![CDATA[Rifki Wardana]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 2 No. 1 (2015) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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<![CDATA[Surface roughness measurement using direct contact methods raises several issues, for examples stylus wear and size limitation problems. Furthermore non-contact methods are proposed to solve these problems. One of them is Electronic Speckle Pattern Interferometry (ESPI), which use Helium-Neon (He - Ne) as laser light source. A speckle pattern is produced by scattered light on the surface of the measuring object due to the interference of laser beams, and it will be captured by Charge Coupled Device (CCD) camera. Afterwards Linear Binary Pattern (LBP) and Self Quotient Image (SQI) methods are used to reduce illumination effect in the captured image. The average gray-level from the previous process will be converted into a surface roughness value by gray level to surface roughness conversion formulation. It is obtained from correlation value between gray level and a set of standard roughness. The standard roughness value range is start from 0.05 micrometer to 12.5 micrometer. It is measured from five different final machining process, which are flat lapping, grinding, horizontal milling, and vertical milling. As verification, the results of ESPI method will be compared with the result of direct contact tools using Mitutoyo Surftest 301 and 401.]]>
<![CDATA[Strain Sensing Comparison Between Single and Multimode Fibers using Optical Low Coherence Interferometry ]]>
<![CDATA[Nafiul Matiin]]>;
<![CDATA[Shih-Hsiang Hsu Mentari]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 2 No. 1 (2015) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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<![CDATA[Optical low coherence interferometry is one of the accurate optical sensing technologies and widely utilized in various physical sensing properties. The system principle is to characterize the relative interferogram movement distance caused by the various strain on a sensing arm. An interferometric strain sensor from two-stage Mach-Zehnder interferometer was demonstrated for double sensitivity improvement. The strain performance comparison between single and multimode fibers will be analyzed for fiber sensing applications. The stepper motor was set up with a movement distance of 20 nanometer in every step and the velocity could achieve 10000 step per second. The fiber strain was characterized as 22.22 microstrain on a 9 centimeter length. The experimental results demonstrated the multimode fiber sensitivity is higher than single mode fiber. Repeatability of both single and multimode are uncertain. The interferogram movement distance from the multimode fiber was higher than a single mode and demonstrates higher sensitivity.]]>
<![CDATA[Modeling Response of Concrete Material due to Biaxial Loading using Finite Element Method Software Based ]]>
<![CDATA[Data Iranata]]>;
<![CDATA[Endah Wahyuni]]>;
<![CDATA[Aniendhita Rizki Amalia]]>;
<![CDATA[Sylvya Anggraini]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 2 No. 1 (2015) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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<![CDATA[Generally the concrete behavior can be observed by the experimental analysis. However, since the computer technology development has been increased rapidly, the computer simulations are also able to represent the detail behavior of concrete. This paper presents the modeling response of concrete material subjected to biaxial loading using finite element method software based. The plain concrete plates with dimensions 200mm x 200mm x 50mm and 150mm x 150mm x 50mm are analyzed using various combinations of biaxial loading. The results of the biaxial load combinations are covering the three non-linear regions of compression–compression, compression–tension, and tension–tension. The results of finite element analysis are also show good agreement to the experimental results that been taken from the previous study. The comparison results the difference between analytical and experimental study are less than 5%. Therefore, the concrete material model based on this finite element method software can be used to simulate the responses in the real condition.]]>
<![CDATA[The Effect of Ship Coefficients on the Efficiency Gain f Propeller-Vane System ]]>
<![CDATA[Setyo Leksono]]>;
<![CDATA[IKAP Utama]]>;
<![CDATA[WD Aryawan]]>;
<![CDATA[MA Djoni]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 2 No. 1 (2015) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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<![CDATA[This paper discusses a correlation between non dimensional parameter of the ship (L/B,B/T, wake fraction, ratio between induced and advance velocity, thrust loading coefficient) and energy gain by applying vane-turbine in the propeller slipstream. The data based on the basis of statistical data (numerical) and model testing. The correlation data can be calculated by quantifying the contribution of causal variables to a targeted effect variable directly and indirectly through other variables and this would be examined by Path analysis. By using this coefficient, it is possible to demonstrate which variable has the main contribution on the efficiency gain. The Data analysis of Microsoft Office Excel software is used to approach the calculation. It is found that L/B and CT affected indirectly the efficiency gain of vane-turbine.]]>
<![CDATA[Comparative Analysis of Feature Selection Method to Predict Customer Loyalty ]]>
<![CDATA[Heni Sulistiani]]>;
<![CDATA[Aris Tjahyanto]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 3 No. 1 (2017) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/joe.v3i1.2257
<![CDATA[The growth of Fast Moving Consumer Goods (FMCG) industry is still showing double-digit and Indonesia becomes a potential market for the products FMCG, so that the competition between companies will be intense. The company have to attempted to survive, one of the way is to maintain customer loyalty. Data mining techniques can be used to predict customer loyalty. In data mining pra-processing, feature selection is one of the important thing to reduces the number of features, removes irrelevant, redundant, or data noise, and brings the immediate effects for applications: speeding up a data mining algorithm, improving mining performance such as the accuracy of the prediction and the comprehensive result. This paper aims to identify the relevant factors that affect the performance of the classification of customer loyalty with several feature selection method and to compare the classification performance in customers loyalty prediction of FMCG products. Data was obtained from the results of fast moving consumer goods customers questionnaires towards several brands of instant noodles in Lampung that was ranked TOP Brand Award Phase 1 2016, using nonprobability sampling method and convenience sampling technique. The result in this paper, chi square feature selection methods with threshold > 0.01 showed the best results, it is indicated by the highest accuracy of random forest classification algorithm, that is 83.2% for thirteenth features.]]>
<![CDATA[The Effectiveness Test of Ultrasonic Extraction Microwave Distillation (USE-MD) Method in Capsaicin Extraction ]]>
<![CDATA[Ach. Ferdiansyah Pradana P]]>;
<![CDATA[Moch. Dimas Khoirul U]]>;
<![CDATA[Angga Septian E]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 3 No. 1 (2017) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/joe.v3i1.2265
<![CDATA[Chili (Capsicum frutescens) is one of foodstuffs whose price is fluctuate and still not processed well, so it becomes damaged. Processing chili becomes capsaicin extract can be done by using MAE method that requires high power and UAE method that produces low yield. Therefore, this study aimed to process chilies as capsaicin extract by using USE-MD and ME-MD methods. Chilies were extracted using 500 ml ethanol 96% in 10, 20, 30, 40 and 50 minutes. The operating condition of the distillation was 78oC with a pressure of 1 atm. The result showed that the best method to get capcaisin extract was USE-MD method with optimum extraction time about 30 minutes. This method gave yield about 2.795% with concentration of capsaicin about 0.94 + 0.02% lb/lb.]]>
<![CDATA[Performance of Seawater Activated Battery as Alternative Energy Resources ]]>
<![CDATA[Masrufaiyah]]>;
<![CDATA[Ridho Hantoro]]>;
<![CDATA[Gunawan Nugroho]]>;
<![CDATA[Totok R. Biyanto]]>;
<![CDATA[Nur Laila Hamidah]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 3 No. 1 (2017) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/joe.v3i1.2266
<![CDATA[Research on Freshwater and Seawater batteries, which using Al and Cu electrodes at variation of different electrolyte salinity, distance between electrodes and flowrate of electrolyte has been carried out. The galvanostatic discharge and Electrochemical Impedance Spectroscopy (EIS) of Al and Cu in seawater were investigated. The results showed the optimum condition with significant average potential discharge of 45,02 mV and current of 0,440 mA obtained from combination of 5% electrolyte salinity, 2 cm space between electrodes and 0,5 liter/hour electrolyte rate. EIS studies revealed that the Al and Cu interficial electrochemical process in seawater was determined by an activation controlled reaction.]]>
<![CDATA[The Relationship Analysis of e-Government Implementation on Increasing Capital Investment in Region (Case Study : Banyuwangi City) ]]>
<![CDATA[Beny Prasetyo]]>;
<![CDATA[Tony Dwi Susanto]]>
<![CDATA[ IPTEK The Journal of Engineering Vol. 3 No. 1 (2017) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/joe.v3i1.2267
<![CDATA[In recent years, the investment climate in Indonesia is increasing, where the realization of capital investment projects in the first quarter of 2014 reached IDR, 106.6 trillion. The increased capital investment can not be separated from the investment attractiveness in Indonesia. Some traditional factors are labor, infrastructure, ecoonomic, social and political, while ICT factor which have influenced on shaping investment attractiveness is e-government of host country. This research will analyze the relationship between e-government implementation at local government level (city) as one of the strategies to realize good governance. With good governance will influence the investors to come for invest. To answer this research, researcher used a qualitative approach with a single case study is Banyuwangi City in East Java Province, Indonesia. Case study used to explore more details about this research topic. The results of this study are e-government implementation have impact on the improvement of good governance quality and increasing investment value.]]>
