Articles
Application of Convolutional Neural Network (CNN) Method in Fluctuations Pattern
Melinda Melinda;
Yunidar Yunidar;
Nur Afny Catur Andryani
Green Intelligent Systems and Applications Volume 3 - Issue 2 - 2023
Publisher : Tecno Scientifica Publishing
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DOI: 10.53623/gisa.v3i2.270
In the acquisition of amplitude data, the inaccuracy of a signal with the occurrence of an unstable peak value of the amplitude in the data is called a fluctuation. This study uses High-High Fluctuation (HHF) signal data from the acquisition of Multi-Spectral Capacitive Sensors (MSCS) with Hydrogen Dioxide (H2O) and Hydrogen Dioxide (H2O) objects mixed with Sodium Hydroxide (NaOH) that have been organized into a matrix form. The data acquisition results in previous studies have several parts that are difficult to distinguish with the naked eye. The method used in this study applies the CNN method for image recognition of signal fluctuations of type HHF from H2O and H2O mixed with NaOH, using the architecture known as AlexNet. Then, the H2O and H2O data groups mixed with NaOH were grouped into training data groups of 280 image data for each data type, and 70 image data for test data for both groups. During the training stage, the number of epochs used is 20. However, by the time the number of epochs reaches 15, the accuracy rate is already high, reaching 98%. Furthermore, at the testing stage, the CNN program can correctly recognize the entire 70 image data for both materials, achieving perfect recognition for the total amount of the two materials.
Implementation of System Development Life Cycle (SDLC) on IoT-Based Lending Locker Application
Melinda Melinda;
Shaquille Rizki Ramadhan Na;
Yudha Nurdin;
Yunidar Yunidar
Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) Vol 7 No 4 (2023): August 2023
Publisher : Ikatan Ahli Informatika Indonesia (IAII)
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DOI: 10.29207/resti.v7i4.5047
Libraries are social institutions that provide information services that can be accessed publicly to meet the information needs of librarians. Based on the results of a survey conducted on 58 students who have visited the library of the Electrical and Computer Engineering Department of the Universitas Syiah Kuala, an information system was needed that provided research book information related to the author's name, year of writing, field concentration, and abstract of the research book, and there was a division of categories based on field concentration, and there was an online borrowing feature. Based on these problems, this study aims to implement an Android application system with IoT-based lending lockers using the SDLC (system development life cycle) prototyping method. This study produces an application with a locker-based online lending feature, several other features as the user desires, and one prototype lending locker. The locker-based online lending system integrated with ESP32-WROOM-32 can connect to Firebase storage and send locker key codes to Firebase so that the application can access them. Through experiments and tests conducted on the application, it is obtained that the application can access the locker key code and display it to the user. The application has also been validated using black-box and white-box testing and can be accepted by users based on the System Usability Scale (SUS) average score with a very feasible interpretation category.
Analisis Kinerja MySQL Cluster Menggunakan Metode Load Balancing
Taufiq Abdul Gani;
Aulia Arafat;
. Melinda
Jurnal Rekayasa Elektrika Vol 11, No 4 (2015)
Publisher : Universitas Syiah Kuala
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DOI: 10.17529/jre.v11i4.2358
Information system and data is a very important thing nowadays. An information system especially a database is designed with a high data availability. One of the database systems is MySQL cluster. Sometimes, its performance decreased because of the system’s incapablity to handle the data. To overcome this problem, the research of load balancing systems for MySQL cluster is needed. This research is intended to analyze the effect of load balancing clustering methods on MySQL cluster which by default has been set as failover clustering. The analysis is done through data collection and database transactions test to get the number of Transactions per second (TPS) and response time parameter using SysBench. The test is divided into two main scenarios, the simple and complex-mode that running on 4 computers. The tests were conducted by giving workloads from 8 up to 128 threads respectively to the server through a client on default conditions and load balancing. The test results showed the number of TPS at MySQL cluster default is 536.61. In contrast, number of TPS at load balancing is better at 2261.22. Likewise, the response time at MySQL cluster load balancing is 147.55 ms faster than that of the default one at 335.00 ms.
Design Gas LPG Leak Detection System Based on Internet of Things
Sari*, Erika Lety Istikhomah Puspita;
Agung Enriko, I Ketut;
Melinda, Melinda
JIM: Jurnal Ilmiah Mahasiswa Pendidikan Sejarah Vol 8, No 3 (2023): Juni, socio-economics, community law, cultural history and social issues
Publisher : Universitas Syiah Kuala
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DOI: 10.24815/jimps.v8i3.24989
Gas leak detection systems are essential for ensuring the safety of people and property. The use of Internet of Things (IoT) technology in gas leak detection systems has become increasingly popular due to its ability to connect devices and collect data from various sources. In this paper, we propose the design and development of an LPG gas leak detection system based on IoT. The system uses LPG gas sensors to detect the presence of gas in the environment, a microcontroller to process the data and send it to the cloud, and a web-based dashboard to display the real-time gas concentration levels and send alerts to users in case of gas leakage. Liquefied Petroleum Gas is a tool that serves to anticipate the safety of a gas leak hazard that can cause explosion and harm to the soul and property. In this final assignment explains how to create a detection system using the MQ-2 gas sensor that is connected to the NODEMCU ESP8266 microcontroller which is then sent to Firebase where the data storage can be viewed in realtime and continued to the Android application, the application used is the MIT App Inventor that has been created to receive notifications in the event of a gas leak. Using a MQ-2 gas sensor with a standard value in the event of gas leakage above 200. This system has fulfilled the rules of the Internet of things because it uses the Internet to connect.
Implementation of PID Controller on Hohenheim Tunnel Dryer Using Ziegler-Nichols Approach Method
Melinda Melinda;
Rita Khatir;
Ari Rahmat Putra Ibina;
Alfatirta Mufti;
Rizal Syahyadi;
Iskandar Hasanuddin
Jurnal POLIMESIN Vol 21, No 1 (2023): February
Publisher : Politeknik Negeri Lhokseumawe
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DOI: 10.30811/jpl.v21i1.3472
Hohenheim Tunnel Dryer has two heating mechanisms, namely the solar collectors and the greenhouse effect. Two outlet fans are used to remove moisture from drying as well as to lower the temperature in the drying chamber. Suppose the outlet fans are turned on continuously, the temperature in the drying room will not reach the optimal drying temperature, and vice versa if the outlet fans are not turned on, the drying temperature can exceed 60°C. Controlling these outlet fans manually is a very inconvenient thing and becomes an obstacle for accepting this drying technology by the farmers. Therefore, this study focused on the design of temperature control for the Hohenheim Tunnel Dryer by using a proportional integral derivative (PID) controller with an Arduino Nano microcontroller. It controls the fan outlet to obtain an optimal drying temperature so that the operation of this dryer becomes more accessible and more efficient. The temperature sensor used is DHT22. The tuning method chosen is the Ziegler – Nichols method, and the setpoint value is selected at 55, which is the optimum temperature for drying most agricultural products. The design, manufacture, and testing of the temperature control system on the Hohenheim tunnel dryer was successfully carried out without over shoot and steady state error so it can be concluded that the system has worked well.
Melinjo fruit outer skin peeler prototype design using grate roller based-on auto reverse movement control
Yunidar Yunidar;
Riska Sufina;
Alfa Tirta Mufti;
Melinda Melinda;
Iskandar Hasanuddin
Jurnal Polimesin Vol 21, No 6 (2023): December
Publisher : Politeknik Negeri Lhokseumawe
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DOI: 10.30811/jpl.v21i6.4160
Cracker snacks made from melinjo fruit are often found in the Pidie Regency area, Aceh. However, processing melinjo seeds into crackers is still manual and takes a long time. In this research, a melinjo peeling machine will be designed to speed up the production process of melinjo crackers. This peeler uses two different electricity sources so it can work in two conditions, namely the PLN electricity supply is on or off. The research method was carried out by collecting data from device testing results and field observations as well as comparing test results with previous research. The movement of the motor is controlled using Time Delay which gives a command to activate the relay and then turns on the 12 V DC motor. The motor rotates clockwise and anti-clockwise continuously (auto reverse) according to the direction of positive and negative potential which is controlled by the relay and Time Delay. The success rate of peeling the outer skin of melinjo seeds using the proposed tool is divided into three types based on differences in seed skin color. The percentage of success for red, orange, and yellowish green melinjo was 68.67%, 51.52% and 25.61% respectively. Thus, in this study, it can be concluded that the most efficient success rate is for red melinjo
IoT-based Heart Signal Processing System for Driver Drowsiness Detection
Yunidar Yunidar;
Melinda Melinda;
Khairani Khairani;
Muhammad Irhamsyah;
Nurlida Basir
Green Intelligent Systems and Applications Volume 3 - Issue 2 - 2023
Publisher : Tecno Scientifica Publishing
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DOI: 10.53623/gisa.v3i2.323
Traffic accidents often result in loss of life and significant economic losses. Indonesia's high number of traffic accidents indicates the need for effective solutions to overcome this problem. Developing a drowsiness detection device is one effort that can be made to reduce accidents caused by drowsy drivers. The data obtained in this study used driver heart rate data. The drowsiness detection tool was developed using the Wemos D1 Pro Esp8266 microcontroller and MAX30102 sensor. Testing was carried out on 25 subjects under two conditions: 'Drowsy' and 'Normal.' The driver's level of drowsiness is determined based on the heart rate measured by the detection device. The Blynk application is used as a visual interface to provide notifications via smartphone if the driver is drowsy. The accuracy of the drowsiness detection tool was compared with the results obtained from the Pulse Oximeter. This research shows that the drowsiness detection tool using the Wemos D1 Pro Esp8266 microcontroller and MAX30102 sensor has an accuracy of around 98% when compared with the pulse oximeter. The Blynk application successfully sends notifications precisely when the driver is drowsy. This study highlights the potential of drowsiness detection devices to improve traffic safety and reduce accidents caused by drowsy drivers.
Menakar Nilai Perusahaan: Uji Kausalitas pada Kepemilikan Institusional dan Kebijakan Hutang
Suwandi, Suwandi;
Luju, Elisabet;
Melinda, Melinda;
Mulyadi, Yose Ega;
Akadiati, Victoria Ari Palma;
Yulianti, Maria Lusiana;
Purwati, Agnes Susana Merry;
Abdurohim, Abdurohim
Akuntansi Vol. 1 No. 3 (2022): September : Jurnal Riset Ilmu Akuntansi
Publisher : Asosiasi Riset Ekonomi dan Akuntansi Indonesia
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DOI: 10.55606/jurnalrisetilmuakuntansi.v1i3.62
The value of companies in various large companies in Indonesia is still not optimal. This causal study aims to examine the effect of institutional ownership and debt policy on firm value in cosmetics and household sub-sector manufacturing companies on the Indonesia Stock Exchange for the 2015-2021 period. A total of 5 sample companies were identified from a total of 10 companies, so that 35 observational data were collected based on purposive sampling technique. The company's financial statement data is collected through the www.idx.co.id page using documentation techniques. The data that has been collected was analyzed using multiple linear regression. The data was processed using SPSS version 23 program. The results showed that, partially institutional ownership had a negative and significant effect on firm value, while debt policy had a positive and significant effect on firm value. Meanwhile, simultaneously, institutional ownership and debt policy have a significant effect on firm value. Following up on the results of this study, the initial identification of firm value on the Indonesia Stock Exchange should be optimized through the assessment of institutional ownership and debt policy, so as to encourage an increase in firm value.
WEB BASED E VOTING TRAINING FOR STUDENT COUNCIL CHAIRMAN ELECTION AT HIGH SCHOOL
Nofrima, Sanny;
Melinda, Melinda;
Fitriyanti, Emiliy
Qardhul Hasan: Media Pengabdian kepada Masyarakat Vol. 9 No. 2 (2023): AGUSTUS
Publisher : Universitas Djuanda
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DOI: 10.30997/qh.v9i2.8626
Implementation in the process of electing the student council president involves information technology using the electoral system as learning for students who practice democracy directly. Activities, especially the election of the Student Council chairperson, still use media assisted by simple information, namely in the form of sheets of paper, and are still not effective. The problem faced requires a new motivation that is easier to guide information on the election of the Student Council chairperson in Palembang City Senior High School as well as minimizing information fraud in the election and facilitating the election of the Student Council chairperson. This study introduces the E-Voting Website to Student Council Palembang City by bringing up the idea of implementing the Student Council chairman election by utilizing development information.
The Role of Organizational Culture in The Relationship Between Workforce Diversity and Employee Performance of Generation Y
Melinda, Melinda;
Nuraini, Endah
Journal of Emerging Business Management and Entrepreneurship Studies Vol. 4 No. 1 (2024): Journal of Emerging Business Management and Entrepreneurship Studies
Publisher : Research Center and Case Clearing House (RC-CCH) - Sekolah Tinggi Manajemen PPM
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DOI: 10.34149/jebmes.v4i1.151
Workforce diversity is a common problem among employees. However, according to Forbes, the application and literature on this topic still need to be improved, even though it is considered a major issue. This research aims to determine the role of organizational culture in the relationship between employee diversity and employee performance, focusing on the Indonesian Y generation who have worked on the island of Java for at least one year. A total sample of 345 Generation Y workers on Java Island was used, and PROCESS MACRO by Hayes was used to determine the role of organizational culture. The research results show that workforce diversity significantly and positively affects organizational culture. Organizational culture has a significant and positive effect on employee performance. Workforce diversity has a significant and positive effect on employee performance. In addition, it was found that organizational culture does not act as a moderator but rather acts as a mediator in the relationship between workforce diversity and employee performance. This role was found to be a mediator after further analysis was carried out. It is highly recommended that future researchers use a more significant number of samples and islands other than Java or choose certain industries to enrich research results. Additionally, the use of other diversity attributes may contribute to the diversity of results.