Article Per Year (5 Year)
p-Index From 2021 - 2026
0.408
P-Index
This Author published in this journals
All Journal CHAIN: Journal of Computer Technology, Computer Engineering and Informatics
Ghifar Javad H Aziz
Universitas Islam Negeri Raden Intan Lampung
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Implementasi Kendali PI pada Single Axis Solar Tracker untuk Smart Lamp Berbasis IoT Ghifar Javad H Aziz; David Naista
CHAIN: Journal of Computer Technology, Computer Engineering, and Informatics Vol. 4 No. 3 (2026): Volume 4 Number 3 July 2026
Publisher : PT. Tech Cart Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58602/chain.v4i3.303

Abstract

Pemanfaatan energi surya sebagai sumber energi alternatif terus berkembang karena bersifat ramah lingkungan dan berkelanjutan. Namun, panel surya dengan posisi tetap memiliki keterbatasan dalam menyerap energi matahari secara optimal akibat perubahan posisi matahari sepanjang hari. Penelitian ini bertujuan untuk mengimplementasikan metode Proportional-Integral (PI) pada Single Axis Solar Tracker (SAST) serta mengintegrasikan teknologi Internet of Things (IoT) untuk monitoring sistem secara real-time. Metode penelitian yang digunakan adalah metode eksperimen dengan memanfaatkan sensor LDR sebagai pendeteksi cahaya, Arduino Uno R4 WiFi sebagai pengendali utama, motor servo sebagai aktuator, sensor PZEM sebagai pemantau parameter kelistrikan, dan Firebase sebagai media pertukaran data. Hasil pengujian menunjukkan bahwa kontrol PI mampu menghasilkan rise time sebesar 2,8913 detik, settling time sebesar 3,6686 detik, dan overshoot sebesar 0,4546%. Validasi sensor menunjukkan rata-rata error sebesar 1,96% pada sensor LDR dan 0,55% pada sensor PZEM. Selain itu, penerapan solar tracker menghasilkan total daya sebesar 92,94 W, lebih tinggi dibandingkan panel surya statis sebesar 77,75 W atau meningkat sebesar 19,54%. Sistem IoT juga mampu menampilkan data secara real-time pada aplikasi mobile dengan rata-rata delay komunikasi sebesar 1,33 detik. Hasil penelitian menunjukkan bahwa sistem yang dikembangkan mampu meningkatkan perolehan daya panel surya serta mendukung monitoring parameter kelistrikan secara real-time melalui aplikasi mobile.
An Usability Evaluation of the English Education Study Program Website Using the System Usability Scale Wahyu Hidayat; David Naista; Ghifar Javad H Aziz
CHAIN: Journal of Computer Technology, Computer Engineering, and Informatics Vol. 4 No. 3 (2026): Volume 4 Number 3 July 2026
Publisher : PT. Tech Cart Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58602/chain.v4i3.308

Abstract

The English Education Study Program website serves as an essential platform for disseminating academic information, supporting communication, and providing various services to students, prospective students, alumni, and others. The effectiveness of a website depends not only on the availability of information but also on its usability, which determines how easily users can interact with and benefit from the system. This study aims to evaluate the usability of the English Education Study Program website https://english.tarbiyah.radenintan.ac.id using the System Usability Scale (SUS). A quantitative descriptive approach was employed, involving website users as respondents. Data were collected through a SUS questionnaire consisting of ten standardized statements measured using a five-point Likert scale. The collected responses were analyzed by calculating individual SUS scores and determining the overall usability score of the website. The evaluation focused on key usability aspects, including learnability, efficiency, effectiveness, consistency, and user satisfaction. The website obtained an average SUS score of 78.5 out of 100. Base on that, the findings identify strengths and areas that require improvement to enhance the user experience and optimize information services. The study demonstrates that the SUS method is a practical and reliable tool for measuring website usability and generating valuable feedback for website development. In addition, the study contributes empirical evidence by comparing the obtained SUS score with previous website usability studies. The conclusions can be used as a basis for improving the quality of the English Education Study Program website and ensuring that it better meets the needs and expectations of its users.
Co-Authors David Naista Wahyu Hidayat