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All Journal Jurnal Pendidikan Teknologi dan Kejuruan Jurnal Nosel ELINVO (Electronics, Informatics, and Vocational Education) Jurnal IPTEK Jurnal Teknologi
Aris Puja Widikda
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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EVALUASI PELAKSANAAN UJIAN ONLINE DENGAN MENGGUNAKAN LEARNING MANAGEMENT SYSTEM MOODLE PADA MATA KULIAH PNEUMATIK HIDROLIK Widikda, Aris Puja
Jurnal Nosel Vol 2, No 1 (2013): July
Publisher : Jurnal Nosel

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (176.137 KB)

Abstract

The purpose of this reasearch to get an overview about: (1) the supporting factors of an implementation online examination using LMS Moodle, (2) the impeding factors of an implementation online examination using LMS Moodle, (3) online examination quality using LMS Moodle, (4) the advantage of online examination using LMS Moodle. This research was conducted on the Mechanical Engineering Education FKIP UNS Surakarta. This was an evaluation research. It used CIPP model (Context, Input, Process, and Product). Population of the research was an affordables, thats ware 58 participants of online examination fourth test competenc pneumatic hidraulic lecturing of fourth semester academic year 2012. Data collection techniques with questionnaires, interviews, and documentation. The validity that used in this research was a content validity. The data analysis technique that used in this research through analysis average that assessed based on evaluation criteria. The results of research show: (1) the supporting factors of implementation online examination using LMS Moodle, are: (a) the aspect of context; the ability of participants in Moodle application uses is quite high, the means that had on students to operate moodle applications is quite held, graphics / display moodle application is quite interesting, moodle application content in an online eaxamination is quite complete. (b) the input aspect; the efforts that done by participants to improve the ability to use moodle application is quite held, the efforts of participants in providing a means that used to operate moodle aplication adequately, the efforts of participants to improve their use of moodle aplication adequately. (c) the aspect of the process; using means moodle application in the implementation online examination adequtly, the useful moodle application content in the online examination process is quite easy. (d) the aspects of the product; quality assessment is quite high, and the benefits of assessment is high. (2) the impading factors of an online examination using LMS Moodle is the time implementation and time duration online examination. (3) the quality of online examination is quite high. (4) the benefits online examination include; the accuracy assessment is a high, the efficiency of the assessment is a high, the effectiveness of the appraisal is a high, the practicality of workmanship is a high, a high assesment accessibility, the question secrecy is high, high security response, high security assessment result.
PENGEMBANGAN MEDIA PEMBELAJARAN INTERAKTIF BERBASIS TUTORIAL PADA MATA PELAJARAN KELISTRIKAN OTOMOTIF DI KELAS XI JURUSAN TEKNIK KENDARAAN RINGAN SMK N 1 LAHAT Aris Puja Widikda; Kasman Rukun; Wakhinuddin Wakhinuddin
Jurnal Pendidikan Teknologi Kejuruan Vol 1 No 3 (2018): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (986.783 KB) | DOI: 10.24036/jptk.v1i3.1823

Abstract

Penelitian ini bertujuan untuk mengembangkan media pembelajaran interaktif pada mata pelajaran Kelistrikan Otomotif di jurusan Teknik Kendaraan Ringan SMK N 1 Lahat. Penelitian ini menggunakan metode Research and Development (R&D) dan penelitian ini juga menggunakan model pengembangan 4D (four-D), yang terdiri dari empat tahapan, yaitu define (pendefinisian), design (perencanaan), develop (pengembangan), dessiminate (penyebaran). Teknik analisa data yang digunakan adalah teknik analisis data deskriptif untuk menentukan kevalidan, kepraktisan dan keefektifan media pembelajaran interaktif pada mata pelajaran Kelistrikan Otomotif. Media pembelajaran ini dirancang dengan menggunakan Lectora Inspire. Hasil yang diperoleh dari penelitian ini adalah sebagai berikut: (1) Validitas media pembelajaran interaktif dinyatakan valid pada validasi ahli materi dengan nilai 0,95 dan pada validasi ahli media dinyatakan valid dengan nilai 0,93, (2) Praktikalitas media pembelajaran interaktif berdasarkan respon guru dinyatakan sangat praktis dengan nilai 96,11 dan berdasarkan respon siswa dinyatakan sangat praktis dengan nilai 90,54, (3) Efektivitas media pembelajaran interaktif dinyatakan efektif dalam meningkatkan hasil belajar siswa dimana rata-rata pretest 61,46% menjadi rata-rata postest 81,37%. Berdasarkan temuan penelitian ini disimpulkan bahwa media pembelajaran interaktif pada mata pelajaran Kelistrikan Otomotif ini valid, praktis, dan efektif untuk dimanfaatkan sebagai sebuah media pembelajaran.
Monitoring Pemeliharaan Prediktif Agitator Mixer pada Water Treatment Berbasis Data (IoT) Widikda, Aris Puja; Frayudha, Angga Debby
Jurnal Teknologi Vol 25, No 3 (2025): Desember 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i3.8297

Abstract

Clean water is a vital necessity for human life and industry, so the clarity of the water treatment system (water treatment) is a crucial factor in maintaining the continuity of clean air supply. One of the important component in this system is the agitator mixer, which functions to mix coagulant and flocculant chemicals so that the dirt particle inspection process runs optimally. Damage to the agitator such as bearing wear, blade alignment, or electric motor disruption can cause a decrease in air quality and increase maintenance costs. This research developed an Internet of Things (IoT)-based predictive maintenance monitoring system to detect the working condition of the agitator mixer in real-time through vibration, temperature, and rotational speed (RPM) sensors. The obtained data was analyzed using the Isolation Forest algorithm to detect anomalies and ANFIS to predict maintenance times. The test results showed a MAPE value of 0.518% and a correlation coefficient of 0.9997, indicating high accuracy between sensor data and actual conditions. This system is able to provide early warning of potential damage, so that maintenance can be carried out in a planned manner without stopping the water treatment process. The implementation of this system improves operational efficiency, extends equipment life, and supports the digital transformation towards a smart and sustainable water treatment industry.
IoT-Based Predictive Maintenance for AC Motors in Water Treatment Plants Using Multi-Sensor Data and LSTM Networks with GAN Augmentation Frayudha, Angga Debby; Widikda, Aris Puja
Elinvo (Electronics, Informatics, and Vocational Education) Vol. 10 No. 2 (2025): November 2025 (In-Press)
Publisher : Department of Electronic and Informatic Engineering Education, Faculty of Engineering, UNY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/elinvo.v10i2.89410

Abstract

AC motors are critical assets in water treatment plants because they operate continuously to drive key processes. Reactive or schedule-based maintenance can miss early degradation and increase the risk of unplanned downtime. This study presents a field implementation of an Internet of Things (IoT)-based predictive maintenance system in a WTP. The system integrates vibration, temperature, and rotational speed (RPM) sensors with a cloud-based IoT pipeline for real-time data acquisition. Operational data were collected for 30 days from a single motor unit and analyzed using Random Forest and Long Short-Term Memory models. To address limited abnormal-event data, Generative Adversarial Network (GAN)-based augmentation was applied during training. The results show that LSTM performed more consistently than Random Forest; after augmentation, the F1-score improved from 0.92 to 0.95. The monitoring data also captured warning-level changes during operation, including vibration up to 3.9 mm/s, temperature up to 95 °C, and rotational speed dropping to around 1420 RPM, which may indicate abnormal operating conditions requiring inspection. Given the single-unit scope and short duration, the findings are reported as an initial implementation case study. Nevertheless, the work demonstrates the feasibility of a low-cost IoT-based monitoring and prediction framework to support maintenance decisions in WTP operations.
Development of IOT-Based Predictive System for Water Treatment for Monitoring Electric Motor Agitators Widikda, Aris Puja; Frayudha, Angga Debby
Jurnal IPTEK Vol 29, No 2 (2025): December
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2025.v29i2.8230

Abstract

This research aims to develop an Internet of Things (IoT)-based predictive maintenance system for AC electric motors used in water treatment plants. The primary objective is to reduce unplanned downtime and enhance operational reliability by enabling proactive scheduling of maintenance activities. Research design adopts a research and development approach, beginning with a preliminary study, followed by system design, prototype implementation, data acquisition, and performance validation. The system integrates vibration, temperature, and rotation sensors with an Arduino/ESP32 microcontroller for real-time data collection. Data is transmitted via MQTT protocol to a cloud platform for storage and analysis. Machine learning algorithms, including Random Forest and Long Short-Term Memory (LSTM), are applied to classify equipment condition and detect anomalies. To address the limitation of failure data, Generative Adversarial Networks (GANs) are employed to generate synthetic training data, improving model robustness. Experimental results show that vibration levels reached 3.9 mm/s, temperature rose to 95 °C, and motor speed dropped to 1420 RPM, all of which signaled potential failure before actual breakdown. The LSTM model achieved an F1-score of 0.92, which increased to 0.95 when combined with GAN-based data augmentation, outperforming Random Forest. In conclusion, the proposed system demonstrates that integrating IoT with multi-sensor data and advanced machine learning enables early fault detection in AC motors. This approach offers a cost-effective and scalable solution for predictive maintenance, reducing downtime and extending equipment lifespan in water treatment operations.
Co-Authors Kasman Rukun Wakhinuddin Wakhinuddin