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
96 Documents
<![CDATA[Design and Development of Fuzzy-PID Controller for Four-Wheeled Mobile Robotic Stability: A Case Study on the Uphill Road ]]>
<![CDATA[brian raafi'u]]>;
<![CDATA[Purwadi Agus Darwito]]>;
<![CDATA[Alex Taufiqurrahman Zain]]>;
<![CDATA[Fitri Adi Iskandarianto]]>;
<![CDATA[Ahmad Fauzan Adziima]]>;
<![CDATA[Herry Sufyan Hadi]]>;
<![CDATA[Sefi Novendra Patrialova]]>;
<![CDATA[Rakmad Amrinsyah Badrul Alam]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 6, No 1 (2020) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v6i2.a7245
<![CDATA[Design intelligent control to maximize the performance of the Four-Wheeled Mobile Robot (FWMR) in case of uphill road problems. The variation of slope angle and load variation on the uphill road is applied to know the performance of the automatic control system on FWMR. The research is divided into three two covering, system identification, design system and simulation testing. The Rotary speed control system response with fuzzy-PID control method has a good performance by anticipating various tilt angle 5o. The system can through uphill with loads 11N with a steady time and fast travel time. The best travel time in the 5o tilt angle condition is 2 seconds with a 4m circuit length. This research concludes that fuzzy-PID control can be implemented and increase the dynamic response of the FWMR effectively on the uphill road problems.]]>
<![CDATA[Opinion Extraction of Public Figure Based on Sentiment Analysis from Twitter ]]>
<![CDATA[Nur Hayatin]]>;
<![CDATA[Mustika Mentari]]>;
<![CDATA[Abidatul Izzah]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 1, No 1 (2014) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v1i1.a434
<![CDATA[Twitter is a microblog that can generate an information from users such as sentiment about public figures. Sentiment analysis of public figure interpret the positive or negative response. This study aims to create system that automatically can extract the opinion about public figure based on sentiment analysis in twitter using two novel features, they are specific term and number of followers public figures lover and hater. Several step to determine the sentiment of public figure are preprocessing, weighting, classifying, and determining sentiment response. In this paper we use six public figures to be observed. This research resulting precision 99%, recall 75%, and accuracy 76,67%.]]>
<![CDATA[Estimation of the Source Parameters of the Flores Earthquake and Their Correlation to Aftershocks ]]>
<![CDATA[Emanuel Destianus Banggut]]>;
<![CDATA[Bagus Jaya Santosa]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 5, No 1 (2019) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v5i1.a5021
<![CDATA[This study uses data provided by BMKG Indonesia which is downloaded from the website www.webdc.eu. The data processing is done by using some software, one of them is Matlab to run Isola software. The software provides information about the fault direction. In addition, this study also uses Coulomb 3.3 software to provide information on subsequent earthquake forecasts. The results showed that the earthquake that occurred on 27th February 2015 gave impact to Coulomb's increase and decrease of stress to some areas in the northern mainland of Flores. The impact of this major earthquake is expected to trigger an earthquake that occurred in northern Flores. Based on the results of data processing obtained form focal mechanism is oblique reverse with the first nodal value strike 139, dip 73, and rake 50. While on the second nodal has a strike value 30, dip 43, and rake 154. Main earthquake impact Coulomb stress increase of 0.15-0.2 bar. Meanwhile, Coulomb stress result obtained shear value -18.890, normal -0.217, and Coulomb -19.976.]]>
<![CDATA[Behavior of Trip Length Distribution Pattern due to the Variation of Trip Length Interval Determination ]]>
<![CDATA[Hitapriya Suprayitno]]>;
<![CDATA[Vita Ratnasari]]>;
<![CDATA[Nina Saraswati]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 4, No 1 (2018) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v4i1.a3561
<![CDATA[Transport Model is always needed and important for developing Transportation System Master Plan. Trip Distribution is one of the important parts of Transport Model, which is a result mathematical operation of trip generation and deterrence function. Trip Length Distribution Pattern is the foundation of Deterrence Function. The trip length distribution pattern can change due to the various trip length interval used. Analog to this, the Deterrence Function can also change. The research result indicate that the distribution pattern change significantly on trip length interval 1 to 3 km. For trip length interval of 4 to 8 km, the trip length distribution indicate the general characteristic of trip length distribution, i.e. the number of trips is high in short distance and getting down in the longer trip distance. The trip interval of 7 km gives the most accepted Tanner Deterrence Function.]]>
<![CDATA[Analysis of Transaction Capability in Gate In-2 Automation Export at PT Terminal Petikemas Surabaya uses Control Chart ]]>
<![CDATA[Chairunissa Kusnoaji]]>;
<![CDATA[Iis Dewi Ratih]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 7, No 1 (2021) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v7i1.a7493
<![CDATA[PT Terminal Petikemas Surabaya is an international standard container terminal that always makes innovations to improve the quality of container export and import services. OCR is a container data identification tool that has begun to be used at the gate in the automation of exports of PT Terminal Petikemas Surabaya. The existence of OCR at the gate in export automation creates a new time motion for transactions that need to be known about the processing capabilities. Using the control chart and Ishikawa diagram, it is found that the time motion transactions that occur at the gate in automation exports of PT Terminal Petikemas Surabaya are statistically out of control and incapable of being caused by many factors, both internal and external.]]>
<![CDATA[Estimation Risk of High Risk Building Project on Contractor ]]>
<![CDATA[Imayanti Basari]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 3, No 2 (2017) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v3i2.a2790
<![CDATA[The increasing need for space and limited land especially in big cities cause many high rise building projects in Indonesia. Construction projects including high rise building projects are located in complex and dynamic environments result in high levels of uncertainty and risk. Risks are always present in construction projects and often lead to delay schedules or cost overruns. Risk management is a process consisting of risk identification, qualitative and quantitative assessment, response with appropriate methods of handling and risk control. The concept of risk management is becoming very popular in a number of businesses. Many companies often create risk management procedures in their projects to improve performance, minimize losses and increase profits Risk event from a different project is different from the risk event on another project. Likewise, the level of occurrence and impact in each project is always changing from one project to another. This makes it difficult for management to handle risks on new projects. Lack of risk management, even inadequate risk analysis, can put construction projects in jeopardy. This research looked for alternatives to get risk event, concequance or impact estimates and likelihood or generic possibilities in order to be used to control the risk of subsequent high rise building projects. This research involves several high rise building projects that will be used as a basis for determining risk events, concequance or impact and likelihood or possibilities. In this study used qualitative methods, and data analysis is done by statistical analysis by finding the average of available data. Estimation this risk can help contractors, especially in the field of high rise building to manage risk both from risk factors, likelihood and consequence.]]>
<![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 Shanti Sekarini]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 6, No 2 (2020) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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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[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[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v2i1.a470
<![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 μm to 12,5 μm. 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[Numerical Investigation of Over Fire Air (OFA) Effect on Flow Characteristics, NOx Combustion and Emission in a 600 Mw Tangentially Fired Pulverized Coal Boiler ]]>
<![CDATA[Eka Setiawan Seputro]]>;
<![CDATA[Bambang Sudarmanta]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 5, No 2 (2019) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v5i2.a5017
<![CDATA[One of the coal-fired air emissions in boilers is NOx, which has a significant impact on the environment and could cause acid rain, ozone formation, visual impairment and health problems in humans. There are several technologies to reduce and control the formation of NOx emissions, which one of these technologies is the use of over-fire air (OFA). In this research will observe the effect of overfire air (OFA) usage and analyze by numerical 3D modeling method using computational fluid dynamics (CFD) in Paiton 9 power plant boiler and analyzed for 5 (five) OFA damper opening variations, i.e 0%, 25%, 50 %, 75% and 100%. This research will analyze several factors that have significant influence on NOx emission formation, that are: the temperature distribution of the boiler during the combustion process, the distribution of nitrogen oxide (NO) and carbon dioxide (CO2), direction of flue gas flow and trajectory of coal particles and residence time indicating the length of time of burning. The results showed that the lower the flame temperature, the smaller the formation of NOx; the smaller the oxygen content in the combustion process, the smaller the formation of NOx; the shorter the residence time of combustion products in the high temperature zone the smaller the formation of NOx, and the smaller the nitrogen content in coal, the smaller the formation of NOx.]]>
<![CDATA[Energy Auditing at Block 1 Muara Karang Combined Cycle Power Plant ]]>
<![CDATA[Andy Setyanto]]>;
<![CDATA[Ary Bachtiar Krishna Putra]]>
<![CDATA[ IPTEK The Journal of Engineering Vol 4, No 3 (2018) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian kepada Masyarakat ]]>
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DOI: 10.12962/j23378557.v4i3.a5016
<![CDATA[Every year electricity growth in the world always increases. But the growing growth is the need for future controls in order to make the utilization more effective and efficient. In addition, with the utilization of appropriate energy will have an impact on the preservation of the surrounding environment. In Indonesia, has been regulated related to the efficient utilization of energy by the enactment of Government Regulation No 70 of 2009 of Energy Conservation. The method used for this research is to conduct an energy audit on PLTGU Block 1 Combined Cycle Power Plant (CCPP) Muara Karang. This audit is begin from collecting operating parameters’ data then conducting the performance calculation of the main equipment. The result of the calculation then compared with commissioning data in 1995. From the calculation obtained the profile of energy use and find the largest gap from the comparison between actual performance with commissioning in 1995. The gap is then analyzed the cause of equipment inefficiency and conducted field study. After that is given the recommendation of Energy Saving Potential to be able to improve the efficiency of the equipment. The recommendations are analyzed by economic studies to provide alternative improvements solution for management.]]>
