Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik https://jurnalteknik.unjani.ac.id/jt <p><strong>Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik </strong>is an <strong>Indonesian and English</strong> <strong>peer-reviewed journal</strong>, which is published<strong> twice a year</strong>. Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik has been <strong>published by Faculty of Engineering, Universitas Jenderal Achmad Yani</strong> in<strong> May</strong> and <strong>November</strong> since 2001 with several 10-20 papers per year. An online version published since 2017 with an online collection and publication based on open access journal and under a <strong><a href="https://creativecommons.org/licenses/by-nc-sa/4.0/deed.id">Creative Commons Attribution 4.0 International License.</a></strong></p> Fakultas Teknik - Universitas Jenderal Achmad Yani en-US Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik 1412-8810 <p>Penulis yang&nbsp;menyerahkan&nbsp;artikel di&nbsp;Jurnal Teknik: Media Pengembangan dan Aplikasi Teknik untuk keperluan publikasi telah mengetahui bahwa&nbsp;Jurnal Teknik: Media Pengembangan dan Aplikasi Teknik memberikan akses terbuka terhadap konten untuk mendukung pertukaran informasi mengenai ilmu pengetahuan, sesuai dengan&nbsp;penerbitan daring yang berbasis Open Access Journal dan mengikuti&nbsp;<a href="https://creativecommons.org/licenses/by-nc-sa/4.0/deed.id" target="_blank">Creative Commons Attribution 4.0 International License</a>. Sehingga penulis setuju dengan ketentuan-ketentuan berikut:<br>1. Penulis&nbsp;memegang&nbsp;hak cipta dan memberikan hak publikasi pertama kepada pihak jurnal dengan pekerjaan secara bersamaan <br>&nbsp; &nbsp; di bawah&nbsp;<a href="https://creativecommons.org/licenses/by-nc-sa/4.0/deed.id" target="_blank">Creative Commons Attribution 4.0 International License</a>&nbsp;yang memungkinkan orang lain untuk berbagi pekerjaan <br>&nbsp; &nbsp; dengan pengakuan kepengarangan karya dan publikasi&nbsp;pertama artikel tersebut&nbsp;di&nbsp;Jurnal Teknik: Media Pengembangan dan <br>&nbsp; &nbsp; Aplikasi Teknik.<br>2. Penulis dapat melakukan perjanjian tambahan untuk hak distribusi non-eksklusif artikel yang telah diterbitkan di jurnal ini <br>&nbsp; &nbsp; (misalnya, posting ke sebuah repositori institusi atau menerbitkannya dalam sebuah buku), dengan&nbsp;mengakui bahwa<br>&nbsp; &nbsp; publikasi pertama dilakukan di&nbsp;Jurnal Teknik: Media Pengembangan dan Aplikasi Teknik.<br>3. Penulis diizinkan dan didorong untuk menyebarkan karya mereka secara daring (misalnya, dalam repositori institusi atau <br>&nbsp; &nbsp; laman web penulis)&nbsp;setelah artikel terbit (proses penerbitan artikel selesai). Hal ini terkait dengan imbas dari pertukaran <br>&nbsp; &nbsp; informasi yang produktif (Lihat&nbsp;<a href="http://opcit.eprints.org/oacitation-biblio.html" target="_blank">Pengaruh Open Access</a>).</p> Penerapan Metode Six Sigma pada IKM Manufaktur Industri Pendukung (Supporting Industry) untuk Meminimalkan Jumlah Produk Cacat https://jurnalteknik.unjani.ac.id/jt/article/view/208 <p>Supporting industry is industries that make goods and services, sell to the free market, or to other industries to support their final products with greater value. With characteristics being business to business, the efficiency of the production process is the key. An efficient production process can minimize defects so that production costs can be minimized. This research is an application of the six sigma method in supporting industries that produce educational aids. Was conducted in a company with a defect rate of up to 8,10%, named combination mirror products with a sigma value is 3,71. Process improvement by implementing the DMAIC (Define-Measure-Analyze-Improve-Control). At the define stage, the dominant defect is the Shrink Mark defect, which is 31% of all types of product defects. The cause of defect is the absence of parameter setting values ​​that are used consistently on the injection molding machine. Through experiments, this research determines the parameter setting values ​​that can minimize shrink mark type defects. The selected parameter setting factors are Cooling Time and Holding Pressure with a value of 20 seconds and Holding Pressure of 105 MPa. The reject rate of the combination mirror product was successfully minimized and the sigma value increased to 4.13.</p> Cucu Wahyudin Agung Apriliandi Copyright (c) 2021 Cucu Wahyudin, Agung Apriliandi http://creativecommons.org/licenses/by-nc-sa/4.0 2021-12-30 2021-12-30 20 2 104 113 10.26874/jt.vol20no2.208 Integrated Application System for Reporting Emergency Situations on Toll Roads Based on NodeMCU https://jurnalteknik.unjani.ac.id/jt/article/view/399 <p>An emergency on a highway is an incident that occurs suddenly and requires a fast and precise handling process. Hotline numbers on highways are still used as a reporting system but often experience busy tones and only rely on GSM mode. The purpose of this research is to make innovations to make it easier to report emergencies quickly and accurately on highways. Internet technology was chosen because the internet is an open long-distance global communication and GSM was chosen because not all locations have internet networks. The system works is that the highway users press one of the pushbuttons according to the emergency experience, then the microcontroller will activate the GPS to detect the location of the reporter and send it to the relevant agencies via the android application, SMS, or email. When the data is successfully sent, the LCD displays a notification. In testing, the results of the GPS error were 34%, while the push button was 0%, the process of sending and receiving data has a time tolerance of no more than 15 seconds. From the test, it can be concluded that the realization of the tools and applications is in accordance with the designed specifications.</p> Griffani Megiyanto Rahmatullah Andry Haidar Idhamartya Wulani Aldiyans Nurcahyo Ajeng Denita Khoerunnisa Copyright (c) 2021 Griffani Megiyanto Rahmatullah, Andry Haidar, Idhamartya Wulani, Aldiyans Nurcahyo, Ajeng Denita Khoerunnisa http://creativecommons.org/licenses/by-nc-sa/4.0 2021-12-30 2021-12-30 20 2 114 124 10.26874/jt.vol20no2.399 Rancang Bangun Purwarupa Energy Harvesting menggunakan Piezoelektrik sebagai Pembangkit Energi Listrik https://jurnalteknik.unjani.ac.id/jt/article/view/383 <p>The call to use clean and sustainable energy as an alternative energy source has grown rapidly over the past decade. This was triggered by the issue of increasing environmental pollution, the limited and decreasing amount of non-renewable energy and became one of the goals of the 2030 Sustainable Development Goals (SDG). According to the principle of conservation of energy, energy cannot be fully utilized, there is always some energy wasted. The technology to reuse "wasted" energy into a source of electrical energy is called energy harvesting. This paper describes the design of a prototype energy harvesting system using a floor-mounted piezoelectric that generates electrical energy when stepped on. The system prototype is composed of 16 piezoelectric arrays which are made into 4 rows and installed in parallel. The system is equipped with the LTC358 energy harvester module and the MT 3608 step-up booster module. Test results showed electrical energy was successfully in the battery. The maximum power generated by the piezoelectric array after passing through a full-wave rectifier is 3.48 W. For the same number of footsteps against the piezoelectric array, the increase in charge of the Li-Po 150 mAH battery is smaller than that of the 250 mAH type.</p> Kusnandar Kusnandar Ni Ketut Hariyawati Dharmi Aisyah Nurul Khairiyah Copyright (c) 2021 Kusnandar Kusnandar, Ni Ketut Hariyawati Dharmi, Aisyah Nurul Khairiyah http://creativecommons.org/licenses/by-nc-sa/4.0 2021-12-30 2021-12-30 20 2 125 135 10.26874/jt.vol20no2.383 Performance Investigation of Cooling Machine Practice Props After Retrofitted by Natural Refrigerants https://jurnalteknik.unjani.ac.id/jt/article/view/419 <p>Resizing the main components of the cooling machine needs to be done after being retrofitted with a new refrigerant. This is done to improve the performance of the cooling engine. In this study, we would like to investigate the effect of adjusting the main components of the cooling machine performance after using new environmentally friendly refrigerants. The experiment was designed on a refrigerator that uses R-134a as a working fluid. The type of hydrocarbon refrigerant used to substitute R-134a is Musicool-22 (MC-22). The cooling load in the evaporator cabin is a salt solution. Testing is done in two stages. In the first stage, the refrigerator operates in its original condition (R-134a with CT1 as the expansion valve). In the second stage, the working fluid R-134a is retrofitted with MC-22 with adjustments to its main components into several variations. Furthermore, the refrigerator performance is measured by comparing the value of the refrigerating effect (RE), the heat of compression, and the refrigerator performance (COP). The test results show that the best refrigerator performance rate is when the refrigerator operates with variation 3 (refrigerant MC-22 with CT2 as the expansion valve), increasing COP values ranging from 0.62% to 2.12%.</p> Mutaufiq Hendri Sulistyo Kamin Sumardi Ega Taqwali Berman Apri Wiyono Copyright (c) 2021 Mutaufiq, Hendri Sulistyo, Kamin Sumardi, Ega Taqwali Berman, Apri Wiyono http://creativecommons.org/licenses/by-nc-sa/4.0 2021-12-30 2021-12-30 20 2 136 145 10.26874/jt.vol20no2.419 Integrated Ion Exchange Resin Activated Carbon Ultrafiltration Unit for Well Water Treatment Into Drinking Water https://jurnalteknik.unjani.ac.id/jt/article/view/426 <p>The availability of healthy well water is still become a problem in several areas in Indonesia, including Cimahi City, West Java. In general, the well water is treated using sand filter and adsorbent (either activated carbon or zeolite). However, the conventional methods produced unsafe drinking water, which does not meet drinking water standards. This study proposed integrated polysulfone ultrafiltration (UF), activated carbon (KA), and ion exchange resin (IE), as an alternative technology. The UF membrane provided a permeate flux of 42 L.m<sup>-2</sup>h<sup>-1</sup>. Based on Hermia’s model, the fouling was dominated by total and standard fouling with R<sup>2</sup> values of 0.8989 and 0.8952, respectively. During the 2 (two) hours of filtration, the permeate flux decreased by 19%. Based on data from the analysis of water products, the UF-KA unit reduced hardness, organic matter, iron, and other contaminants to below the threshold value for drinking water quality standards. However, the concentration of manganese compounds was still 0.601 mg/L above the standard threshold (0.4 mg/L). With the addition of the IE unit after the UF-KA process, the water products produced meet the drinking water quality standards. The removal of turbidity, iron, and manganese by the UF-KA-IE was 95.9%, 99.9%, and 72.5%</p> Putu Teta Aryanti Tania Finarianingrum Annisa Rakhmawati Darlis Fahmi Widjaya Adhani Nur Fajrina5 Copyright (c) 2021 Putu Teta Aryanti, Tania Finarianingrum, Annisa Rakhmawati Darlis, Fahmi Widjaya, Adhani Nur Fajrina5 http://creativecommons.org/licenses/by-nc-sa/4.0 2021-12-30 2021-12-30 20 2 146 155 10.26874/jt.vol20no2.426 ABC Method Approach in Store X for Inventory Control https://jurnalteknik.unjani.ac.id/jt/article/view/400 <p>Retail industry competition is so tight, one of which is cost efficiency, which can be done by controlling inventory. Store X is one of the modern retail stores in Indonesia. Store X sells various types of fast-moving consumer goods (FMCG). The company implements a make to stock system to meet consumer demand. The amount of inventory in the warehouse is not in accordance with consumer demand so that there is a buildup of goods in the warehouse which results in high inventory costs. In addition, some of the goods sold have low stock, even though there is a lot of consumer demand. Conditions like this will result in losses for the company. Category A 30% total goods Rp. 38.235.557,-. Classification B 20% total goods worth Rp. 7.748.157,-. Category C 50%. value of Rp. 4.552.842,- Economical order at shop X, for stock of item A, namely mineral water A PET 600 ml, the order is made when stock is 7 pcs, safety stock is 46 pcs. Mineral water A PET 1500 ML ordering supplies 7 pcs, safety supplies 52 pcs. Bear brand milk 12 ml with order when stock is 11 pcs, safety stock 39 pcs.</p> Ermayana Megawati Jihan Pradesi Dewi Zainul Khabibah Firman Ardiansyah Ekoanindiyo Copyright (c) 2021 Ermayana Megawati, Jihan Pradesi, Dewi Zainul Khabibah, Firman Ardiansyah Ekoanindiyo http://creativecommons.org/licenses/by-nc-sa/4.0 2021-12-30 2021-12-30 20 2 156 165 10.26874/jt.vol20no2.400 Digital Filter Application for Image Containing Salt and Pepper Noise Using the Directional Weighted Minimum Deviation Method https://jurnalteknik.unjani.ac.id/jt/article/view/418 <p>Telecommunications technology growing rapidly, from the initial communication using letters, and now has reached the stage of image and video communication. In the process of transmitting data, both sound and images cannot be separated from noise. One solution to answer these problems is develop Digital Filter technology. In this research, a digital filter realized with an image object using the DWMD Filter method by detecting the type of salt and pepper noise. The DWMD Filter is a direction and standard deviation based digital data processing that improves the Median filter. With the PSNR, it is known that DWMD can produce better images than the Median Filter. This DWMD Filter method is coupled with an automatic Threshold determination to help the filter process to be faster where the largest PSNR difference is taken. The experimental results show that at a noise level of 5% - 65% the DWMD method produces a PSNR of 21-36 dB compared to the Median Filter of 13-29 dB. This research has an output in the form a desktop application that is equipped with features that can add salt and pepper noise in various densities and access images that can be converted into grayscale format.</p> Rifa Hanifatunnisa Rahmawati Hasanah Copyright (c) 2021 Rifa Hanifatunnisa, Rahmawati Hasanah http://creativecommons.org/licenses/by-nc-sa/4.0 2021-12-30 2021-12-30 20 2 180 189 10.26874/jt.vol20no2.418 Effect of Alloy Elements and Compounds on Characteristics of Magnesium Alloys and Their Applications - Study https://jurnalteknik.unjani.ac.id/jt/article/view/424 <p>Alloys based on Magnesium the lightest structural metal and Mg have great application potential in the automotive and aerospace industries. However, Magnesium in its application is limited by its low strength and ductility. The most effective way to increase strength and ductility is by adding alloying elements, grain refinement, and dispersion strengthening. However, universal strengthening techniques for magnesium alloys are still being researched, and some are still being debated. This paper presents a brief overview of the development of methods of adding alloying elements to magnesium alloys, contributing to a better understanding of the factors controlling mechanical properties and providing an outlook for future research in this area.</p> Adi Ganda Putra Azwar Manaf Djoko HP Copyright (c) 2021 Adi Ganda Putra, Azwar Manaf, Djoko HP http://creativecommons.org/licenses/by-nc-sa/4.0 2021-12-30 2021-12-30 20 2 166 179 10.26874/jt.vol20no2.424