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Mohammad Adam Jerusalem
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INDONESIA
Journal of Engineering and Applied Technology
Published by Universitas Negeri Yogyakarta
ISSN : 27162257     EISSN : 27162265     DOI : https://doi.org/10.21831/jeatech
Core Subject : Engineering,
Automotive Engineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Mechanical Engineering
Journal of Engineering and Applied Technology (JEATech) is an open-access double-blind peer-reviewed journal of Engineering, Technology, and Applied Technology. Authors are invited to disseminate theoretical and practice-oriented topics relevant to: Electrical Engineering Electronic Engineering Informatics engineering Computer Science Mechatronics Engineering Mechanical Engineering Automotive Engineering Civil Engineering Industrial Engineering Applied technology related to the previous fields of engineering
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 61 Documents
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Study case ratio gear of stepper motor on electronic throttle using PID control Ayu Sandra Dewi; Zainal Arifin; I Wayan Adiyasa
Journal of Engineering and Applied Technology Vol 2, No 1 (2021): (March)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v2i1.39413

Abstract

The throttle is a component that determines the amount of airflow into the combustion chamber. The latest in-vehicle technology makes it possible to adjust the fly valve electronically. The electronic system adjusts the angle size by comparing the predetermined setpoints. In research, electronic system designs are based on existing models. The throttle model uses a stepper motor drive. Electronic control using a microcontroller with proportional-integral-derivative (PID) control. While the setpoint is based on a reference from the throttle position sensor (TPS) sensor. The greater the throttle reference value, the greater the angle opening of the butterfly valve. The results of this study obtained a simulation model of electronic throttle control from gear ratios of 1: 1, 5: 1, and 10: 1 for conventional vehicles.
Hybrid method integrating SQL-IF and Naïve Bayes for SQL injection attack avoidance Faisal Yudo Hernawan; Indra Hidayatulloh; Ipam Fuaddina Adam
Journal of Engineering and Applied Technology Vol 1, No 2 (2020): (August)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v1i2.35497

Abstract

Web applications are the objects most targeted by attackers. The technique most often used to attack web applications is SQL injection. This attack is categorized as dangerous because it can be used to illegally retrieve, modify, delete data, and even take over databases and web applications. To prevent SQL injection attacks from being executed by the database, a system that can identify attack patterns and can learn to detect new patterns from various attack patterns that have occurred is required. This study aims to build a system that acts as a proxy to prevent SQL injection attacks using the Hybrid Method which is a combination of SQL Injection Free Secure (SQL-IF) and Naïve Bayes methods. Tests were carried out to determine the level of accuracy, the effect of constants (K) on SQL-IF, and the number of datasets on Naïve Bayes on the accuracy and efficiency (average load time) of web pages. The test results showed that the Hybrid Method can improve the accuracy of SQL injection attack prevention. Smaller K values and larger dataset will produce better accuracy. The Hybrid Method produces a longer average web page load time than using only the SQL-IF or Naïve Bayes methods.
Characteristics of ASTM A36 steel plate corrosion rate due to bending treatment with angle, corrosion media, and corrosion time variations Muhamad Zainal Arifin; Djoko Kustono; Widiyanti Widiyanti
Journal of Engineering and Applied Technology Vol 1, No 1 (2020): (March)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v1i1.31478

Abstract

Bending can cause stress to the workpiece, where the stress can cause a fine crack in the metal which can lead to corrosion. Corrosion that occurs can result in a decline in the quality of metals, especially in mechanical properties. This study aims to determine the characteristics of the corrosion rate of each bending angle. This study uses low carbon steel with ASTM A36 type plates, this type of steel is often used in ship production. This research is an experimental study using descriptive statistical methods, and 3x3 factorial Anava for testing hypotheses. From this research, the results obtained in the form of corrosion rate values, where the characteristics of the corrosion rate of steel plates with the lowest corrosion resistance are at 60o bending treatment, seawater media, and 48 hours with a corrosion rate of 2.005 mmpy. Corrosion rate characteristics with the best resistance are in the bending treatment of 120o, PDAM water media, and 24 hour time with a corrosion rate of 0.695 mmpy. Hypothesis test results state that there is a significant effect of variations in bending angle, corrosion media, and corrosion time on the value of the corrosion rate.
Designing a mobile user experience student knowledge management system using Lean UX Condro Kartiko; Hesa Abda Arrasyid; Ariq Cahya Wardhana
Journal of Engineering and Applied Technology Vol 2, No 1 (2021): (March)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v2i1.39476

Abstract

Student Affairs at Telkom Purwokerto Institute of Technology has a lot of information and knowledge that all students need to know. However, this information and knowledge have not been maximally conveyed to students. Student affairs have a scope of work to handle the Student Creativity Program (PKM), Student Organization (Ormawa), scholarships, Student Activity Transcripts (TAK), and lectures. Therefore, one of the efforts to facilitate Student Affairs in conveying various knowledge is a Student Knowledge Management System mobile application. User Experience student KMS mobile application designed for mobile devices that focus on interface design. The development of this application interface uses the Lean UX method. The Lean UX method has four stages: Declare Assumptions, Create an MVP, Run an Experiment, and Feedback and Research. The application design is evaluated using the Enhanced Cognitive Walkthrough (ECW) to produce a prototype of a knowledge management system or Knowledge Management System for IT Telkom Purwokerto student affairs according to the user's wishes. The test results show success in all tasks, so it can be concluded that the application design has achieved a good user experience. 
The performance of stability test using Bantak aggregate and AC50/70 as polymer on Marshall characteristic Tino Putro Pangestu; Wasiu Akande Ahmad; Adi Setiabudi Bawono; Mohamad Aqifd
Journal of Engineering and Applied Technology Vol 1, No 2 (2020): (August)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v1i2.39232

Abstract

This study aims to determine Marshall's characteristics using asphalt binder modified polymer AC 50/70 (Starbit E-55) using local Bantak material. The test method used is a hot mix asphalt (Hot Mix) with the Marshall method. The asphalt content used was 5% successively; 5.5%; 6%; 6.5%; and 7% consisting of 3 specimens for each variant. The research was carried out at the Material Laboratory of the Department of Civil Engineering and Planning, Faculty of Engineering, Yogyakarta State University. The results of the Marshall characteristic performance test at the Optimum Asphalt Level (KAO) 6.5% are as follows: Marshall stability mean value is 1197.6 kg, Density mean value is 2.34 gr/cc, the mean value of melt (Flow) is 3, 1 mm, the mean value of VIM (Void in Mix) was 4.83%, the mean value of VMA (Void in Mineral Aggregate) was 13.40%, the mean value of VFB (Void Filled Bitumen) was 60.61%, and the mean value of MQ (Marshall Quotient) 391.08 kg/mm.
K-Nearest Neighbor (K-NN) algorithm with Euclidean and Manhattan in classification of student graduation Nur Hidayati; Arief Hermawan
Journal of Engineering and Applied Technology Vol 2, No 2 (2021): (August)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v2i2.42777

Abstract

K-Nearest Neighbor (K-NN) algorithm is a classification algorithm that has been proven to solve various classification problems. Two approaches that can be used in this algorithm are K-NN with Euclidean and K-NN with Manhattan. The research aims to apply the K-NN algorithm with Euclidean and K-NN with Manhattan to classify the accuracy of graduation. Student graduation is determined by the variables of gender, major, number of first-semester credits, number of second-semester credits, number of third-semester credits, grade point on the first semester, grade point on the second semester, grade point on the third semester, and age. These variables determine the accuracy of student graduation, timely or untimely. The implementation of the K-NN algorithm is carried out using Rapidminer software. The results were obtained after testing 380 training data and 163 testing data.  The best accuracy system was achieved at K=7 with a value of 85.28%. The two algorithmic approaches did not affect the accuracy of the results. Furthermore, the addition of the value of K did not completely affect the accuracy.
The kitchen fire prevention system using a global system for mobile Rosnee Ahad; Nur Amani Lowe Mohd Shafiq Lowe; Mohamad Zaid Mustafa; Sri Sumarwati
Journal of Engineering and Applied Technology Vol 2, No 2 (2021): (August)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v2i2.42830

Abstract

Fire is one of the disasters that cause property loss and casualties. Based on statistical analysis, the cases related to Liquefied Petroleum Gas (LPG) fires caused by the stove, are repeated every year. There is no fire prevention system in the house, usually in the kitchen, applied as a safety and prevention measure to prevent fire. Therefore, this quantitative study aims to develop a prototype of the kitchen fire prevention system using the Global System for Mobile (GSM) modem to reduce the risk of fire in the living room caused by the kitchen appliances. The development of this project refers to the five steps in the Software Development Life Cycle (SDLC) method which is needs analysis, design, implementation, testing, and evaluation. The results show that the prototype combines two types of sensors namely MQ135, and LM35, where it works simultaneously in two conditions. Under "Reminder 1", when the MQ135 detects smoke above 100 while LM35 exceeds 40ºC, the Arduino Uno microcontroller directs the DC motor to turn off the kitchen valve automatically. Besides, GSM simultaneously sends the first warning message to the user. In the "Warning 2" state, when MQ135 detects smoke above 200 while LM35 is above 50ºC, GSM sends a second warning message. The findings of this study indicate that experts recommend improvements to use the 5V power supply from the AC / DC adapter. Overall, experts argue that the prototype design is clear and easy to understand and the prototype of the stove fire prevention system is suitable for development for safety and notification purposes.
The characteristics of stability test using Bantak as the main aggregate Mohamad Aqif; Md. Masudul Haque; Wasiu Akande Ahmad
Journal of Engineering and Applied Technology Vol 2, No 2 (2021): (August)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v2i2.42623

Abstract

This study aims to determine the characteristics of the stability test using Bantak as the main material. Fundamental studies in terms of the characteristics of Stability values include Density (Density), Flow (melting), VIM (Void in Mix), VMA (Void in Mineral Aggregate), VFB (Void Filled Bitumen), and Marshall Quotient (MQ). This study uses an experimental test method consisting of different bitumen content variants, respectively, 5%, 5.5%, 6%, 6.5%, and 7%. Each variant consists of three samples of the test object. The research was carried out at the building materials laboratory, Faculty of Engineering, Universitas Negeri Yogyakarta. The implementation stages include inspection of AC 60/70, an inspection of aggregates (fine aggregate and coarse aggregate), an inspection of fillers, and manufacturing mixed specimens and stability tests with various characteristics. The results of the research showed that the average value of stability, density, flow, void in the mix, void mineral aggregate, void filled bitumen, and Marshall quotient was 1156.44 kg, 2.33 gr/cc, 3.07 mm, 5.20 %, 13.92% 60.10% and 377.28 kg/mm. Finally, Bantak aggregate can be used as an alternative in the manufacture of hot asphalt mixtures because the research performance data meet the requirements for accepting Indonesian national standards. Its abundant availability makes Bantak a solution in exploiting Merapi material, which is very influential on the environmental impact and improves residents' economy in the quarry area. 
Utilization of Siam Weed leaves (Chromolaena odorata L.) as natural dyes Dulmalik Dulmalik; Selli Rosliani; Sella Rosliana
Journal of Engineering and Applied Technology Vol 2, No 2 (2021): (August)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v2i2.42030

Abstract

Siam Weed leaves can be used as natural dyes since they contain tannin compounds which give a brown color to the dyeing of fabrics. This study was conducted to utilize Siam Weed leaves as a natural dye substitute for synthetic cotton cloth and obtain dye from Siam Weed leaves in liquid form. The material used is a dyed cotton cloth with the extract of Siam Weed leaves. The variation of dipping time was 30 minutes and 13 hours. The types of fixators used were Ferrous Sulfate and Alum solution. The findings showed that the type of fixator can affect the color result of the fabric. The fixed fixator produces a dark green color while the Alum solution produces a yellow color. Based on the results of the dry rub test, the cloth that has been immersed in the dye for 13 hours and fixed by an Alum fixator produces the maximum color fastness value with a staining scale value of 5, 5, 5 (very good). Whereas in the wet rub test, the cloth that has been immersed in the dye for 13 hours and fixed with an Alum solution fixator produces good values with a range of values for the staining scale 4-5, 4-5, 4-5 (good). In the colorfastness test of washing cloth soap soaked for 30 minutes, the best dye fastness with a grayscale value of 4-5, 4-5, 4-5 (good). The type of fixator that has the best colorfastness in the washing test is the Alum fixator.
Research on the automatic generation code for nuclear fuel reloading patterns in pressurized water-cooled reactors Abednego Kristanto; Wang Kan; Peng Sitao
Journal of Engineering and Applied Technology Vol 2, No 2 (2021): (August)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v2i2.39922

Abstract

A method for automated generation program for nuclear fuel reloading patterns in Pressurized Water Reactor (PWR) has been developed. This newly-developed method consists of six different steps to minimize the maximum FΔH value, and maximize the reactor cycle length. Step 1 is initial fuel placement that is expected to produce the longest cycle length possible with the selected Fuel Assemblies (FAs) for the current cycle. Step 2 is aiming to decrease the FΔH value of the FA with the maximum FΔH. Step 3 aims to increase the FΔH value of the old FA with the lowest FΔH. Step 4 is rotating FA with the lowest FΔH value to increase its FΔH value, and rotating several old FAs in the neighboring FA with the maximum FΔH value to decrease the maximum FΔH value. Step 5 is aiming to increase the FΔH value of FA with the lowest FΔH value. The last step or step 6, will try to move FAs that have high k∞ in the periphery zone, inward to increase the cycle length of the reactor. These steps are translated into code in the Python programming language to enable automatic execution in a computer. A 3D nuclear reactor core neutronic code, COCO, is used for the calculation of FΔH value and reactor cycle length. Every nuclear power plant designer company will have their FΔH peaking factor safety limit in accordance with their DNB experiments and calculations, and the FΔH value safety limit used in this research is 1.46. A PWR loading pattern model is used to test this method. During the test, all the steps in this method are successfully executed in a total of 25 iterations plus one initialization calculation and produced acceptable results. The results of this method are all of the loading patterns found in all steps which have the maximum FΔH value below the defined criterion values. In the mentioned PWR loading pattern model, four optimized loading patterns are found using this method, all of which can be selected in the PWR refueling loading pattern design. 

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