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JEEMECS (Journal of Electrical Engineering, Mechatronic and Computer Science)
Published by Universitas Merdeka Malang
ISSN : 26144859     EISSN : 26144867     DOI : -
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering
JEEMECS is an Open-Access journal who managed by Electrical Engineering Department, Faculty of Engineering, Universitas Merdeka Malang, Indonesia. The technologies are rapidly changing and updating. Thus rapid distribution and publication to researchers, engineers, and educators are very important. Our aim after receiving the manuscript and editing process required is to quickly publish the received letters. Publishing periodically 2 (two) times a year. More several other changes in JEEMECS are informed in the journal history.
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol 5, No 2 (2022): August 2022" : 5 Documents clear
Implementation Of Hot Spot Server And Bandwidth Management Using PCQ On Microtik Eka Syah Putra; Andi Maslan
JEEMECS (Journal of Electrical Engineering, Mechatronic and Computer Science) Vol 5, No 2 (2022): August 2022
Publisher : Merdeka Malang University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jeemecs.v5i2.6052

Abstract

Lajau Kopi is a cafe located in Batu Aji, Batam, and utilizes the internet with a total bandwidth of 20 Mbps. The high access of users who use the internet, the connection becomes unstable, sometimes fast or sometimes slow and the number of users who use the downloader application results in decreased performance of the internet network, the purpose of this research is to optimize bandwidth so that the available bandwidth can be used evenly and apply the PCQ method. as one of the bandwidth management methods used. For this reason, it is necessary to build a bandwidth management method that uses a proxy routerboard with the PCQ (Per Connection Queue) method. The PCQ method is one of the methods on the proxy router that is quite reliable in bandwidth management, which is to divide bandwidth fairly and evenly. The analysis is implemented by configuring the mikrotik router and conducting direct testing assisted using speedtest.cbn.net.id and tools on winbox, namely torch. From the test results obtained in the PCQ method at Lajau Kopi, it is quite good and each computer gets bandwidth fairly and evenly. With the bandwidth owned by Lajau Kopi, which is 20 Mbps, which means 1 Mbps = 1024 Kbps * 20 = 20480 Kbps which will be divided automatically if all 4 users are using it, this bandwidth management will be carried out evenly, which is 10 Mbps for each download. users. As for uploading 1 Mbps for each user.
Image Extraction of Lettuce Leaves using Fast Fourier Transform Method and Color Moments Danang Erwanto; Yudo Bismo Utomo
JEEMECS (Journal of Electrical Engineering, Mechatronic and Computer Science) Vol 5, No 2 (2022): August 2022
Publisher : Merdeka Malang University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jeemecs.v5i2.5275

Abstract

Lettuce (Lactuca sativa L.) is a seasonal leaf vegetable with high nutritional content which is usually fresh for consumption. Typical harvest age for lettuce is 45 days. Lettuce which is harvested more than 45 days will affect the taste of the lettuce. In addition to the lettuce’s age, there are several things that can affect taste of the lettuce, including room temperature, harvest time, and thickness of the leaf color. In this study, Fast Fourier transform (FFT) was used as feature extraction by changing the spatial domain in frequency domain image of the lettuce leaves, while the color moment method was used as the extraction of lettuce leaves. With this digital image processing, it can automatically identify maturity level of lettuce leaves. The classification process uses the Naïve Bayes method with the Weka application. The obtained results of texture and color extraction using FFT method and the color moment using Naïve Bayes classification method in the Weka application work well. From the results of the age classification of lettuce based on its leaf color, the average percentage of total accuracy was 94.4%. The correlation of color and taste using the correlation test which performed by SPSS, and it was found that there are positive relationship between color and taste with sig. (1-tailed) 0.05.
Application of Pas Card Service at Hang Nadim Batam Airport Based on Web Dedy Saputra; Yusli Yenni
JEEMECS (Journal of Electrical Engineering, Mechatronic and Computer Science) Vol 5, No 2 (2022): August 2022
Publisher : Merdeka Malang University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jeemecs.v5i2.5348

Abstract

With the status of an international airport and the size of this airport, the airport enforces a policy, namely that every area in Hang Nadim Airport has certain access restrictions. Airport employees can pass through or enter several vital areas of the airport, in contrast to shopkeepers or tenants, cargo employees, and airline employees, they cannot enter the airport area freely, usually all workers at the airport have certain area restrictions on the card The airport's Public Address System (PAS) is used and has been determined. The objectives and expectations of this research are to analyze the needs, design, and implement a web-based PAS card service system at Hang Nadim airport. By determining the system design method used by researchers in making this research, namely the Waterfall method, and concluding that, the pass card service system at Hang Nadim Airport Batam currently has too many unnecessary procedures, which makes the bureaucratic process of making existing pass cards. In that place it seems convoluted. With the new system it is hoped that it can cut more unnecessary time and procedures, and the application of web-based PAS card services at Batam Hang Nadim airport which is designed is expected to simplify the process of making the pass card itself, as well as the implementation process at Batam Hang Nadim Airport. Done by installing software and also the required hardware and a system server whose system design only reaches the proposed stage of system implementation.
Analysis of Planar Inverted-F Antenna (PIFA) U-Shaped At 2.4-3.7 GHz For 5G Communication Gerry Glenaldy Warae
JEEMECS (Journal of Electrical Engineering, Mechatronic and Computer Science) Vol 5, No 2 (2022): August 2022
Publisher : Merdeka Malang University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jeemecs.v5i2.5918

Abstract

PIFA u-shaped is one type of PIFA which is better than other types of PIFA. It has advantages in the form of easy production, simple antenna structure, low production costs, and low specific absorption rate where the antenna can be manipulated by adding pins to the feed to reduce the size of the antenna dimensions. PIFA U-Shaped has two frequencies slots, that can work at two different working frequencies which is 2.4 GHz and 3.7 GHz.The PIFA u-shaped design process is carried out by using math formulation and experimental methods with several reference of processors journal helps. For simulate it, it uses some software. Magus Antenna is one of them for designing purpose and for simulating and optimizing the Antenna is using the CST Studio Suite 2020 software. The PIFA optimization process is carried out by changing the antenna dimension elements, to get the IEEE defined standards, which is VSWR ≤ 1, reference impedance 50 Ω, and s-parameter below -20dB.The results obtained in the form of slot 1 antenna that works at a frequency of 2.4 GHz and slot 2 at a frequency of 3.7 GHz. The results obtained are the value of slot 1 and slot 2. VSWR has a value of 1.10090581 and 1.09702511. The return loss is -26.369808 and -26.69439. The gain is worth 3.49 and 2.82. The antenna has a line impedance of 50.150508 Ω which has a tolerance of 0.150508 Ω.
Efficiency of the Position Tracking Photovoltaics using Microcontroller Atmega Anggara Trisna Nugraha; Moch Fadhil Ramadhan; Muhammad Jafar Shiddiq
JEEMECS (Journal of Electrical Engineering, Mechatronic and Computer Science) Vol 5, No 2 (2022): August 2022
Publisher : Merdeka Malang University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jeemecs.v5i2.6031

Abstract

So far, solar cells are known to have many weaknesses in terms of installation and position to the sun, so that the performance of solar cells on rechargeable batteries is less than optimal. Therefore, additional tools are needed to support these solar cells so that they can work optimally and produce bigger currents. Compare a sunlight tracker with an LDR system, and compare a sunlight tracker with a direct sunlight sensor with a passive system. Atmega16 is used as a control motor and automatic charger, LDR is used as a sunshine receiver, and a DC motor and a stepper are used as a sunshine indicator player. The solar cell used has a capacity of 20 WP. The automatic filling system uses a microcontroller to increase the cost and efficiency of installation. After that, the two systems will be compared first to find out the difference in power generated by the solar cell system using a tracer and a passive tracer. Using a tracking system will collect data for a week, while using a passive system will collect data for a week. By using the result data to be analyzed, the system can be analyzed and compared, and its efficiency can be determined. The solar cell tracking system is expected to increase battery charge faster than passive locations

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