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All Journal Jurnal Sains Materi Indonesia TELKOMNIKA (Telecommunication Computing Electronics and Control) Bulletin of Electrical Engineering and Informatics Jurnal Matematika & Sains Journal of Mathematical and Fundamental Sciences Indonesian Journal of Science and Technology ELECTRANS Momentum: Physics Education Journal JITTER (Jurnal Ilmiah Teknologi Informasi Terapan) Jurnal Elektronika dan Telekomunikasi CARADDE: Jurnal Pengabdian Kepada Masyarakat Journal of Educational Research and Evaluation TELEKONTRAN: Jurnal Ilmiah Telekomunikasi, Kendali dan Elektronika Terapan Journal of Vocational Education Studies Industrial Research Workshop and National Seminar Indonesian Journal of Physics (IJP) Wahana Fisika : Jurnal Fisika dan Terapannya
Budi Mulyanti
Universitas Pendidikan Indonesia
Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Other

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Journal : Indonesian Journal of Science and Technology

 1 
Distance Learning in Vocational High Schools during the COVID-19 Pandemic in West Java Province, Indonesia Mulyanti, Budi; Purnama, Wawan; Pawinanto, Roer Eka
Indonesian Journal of Science and Technology Vol 5, No 2 (2020): IJOST: VOLUME 5, ISSUE 2, 2020
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v5i2.24640

Abstract

This study aims to investigate (1) the availability of learning facilities for distance learning (or online learning), (2) the ability of students and teachers to utilize the learning facilities, and (3) how distance learning activities take place at public or private vocational high schools, specifically whether it is perceived to be more interesting than ordinary learning. This study used a survey method to obtain data and a quantitative descriptive method to analyze the data. The type of data in this study was primary based on the responses of respondents or individuals from groups representing the population of public and private vocational high schools, especially in the Electrical Engineering Clusters in the entire areas of West Java. The results revealed that online learning has been carried out in many public and private vocational high schools in West Java. This study indicates that the availability of online learning facilities, the utilization of facilities, and the online learning process in public vocational high schools were better than those in private vocational high schools. In general, students of both public and private vocational high schools stated that online learning is not more interesting than ordinary learning, although most of them can understand the lessons taught and they were given an opportunity by their teachers to actively participate during the learning process.
A Design and performance analysis of a telemetry system for remote monitoring of turbidity of water during the COVID-19 pandemic Hasanah, Lilik; Hakim, Wahyu Luqmanul; Aminudin, Ahmad; Sahari, Siti Kudnie; Mulyanti, Budi
Indonesian Journal of Science and Technology Vol 5, No 2 (2020): IJOST: VOLUME 5, ISSUE 2, 2020
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v5i2.24705

Abstract

A turbidity telemetry system for COVID-19 pandemic situations using nRF24L01+transceiver and SEN0189 water turbidity sensor-based microcontroller has been successfuly  developed.. The method used to characterize the sensor is by comparing sensor output voltages with the value of water turbidity. Turbid water used was created by adding distilled water with a concentration of sediment obtained from the filtered sediment with less than 60 μm in diameter. Data transmission performance for various transmit power was done by calculating the error percentages by comparing the number of messages sent by transmitter and received by receiver. The transmit power settings were 0, -6, -12, and 18 dBm and variations in the distance of data transmission from 10 to 80 m. The test results show that the water turbidity sensor has a good measurement range in measuring turbidity of water from 1.873 to 3500 NTU. Higher concentrations of sediment and turbidity of the water made the sensor output voltage decrease. There was a decrease in output voltage in the value, namely -0.0006 in turbidity sensor sensitivity. The results also show an increase in error percentages as the distance of data transmission increases, while the bigger the transmit power is used for data transmission, the smaller the percentage of errors occurs.
Biomass-Based Supercapacitors Electrodes for Electrical Energy Storage Systems Activated Using Chemical Activation Method: A Literature Review and Bibliometric Analysis Ida Hamidah; Ramdhani Ramdhani; Apri Wiyono; Budi Mulyanti; Roer Eka Pawinanto; Lilik Hasanah; Markus Diantoro; Brian Yuliarto; Jumril Yunas; Andrivo Rusydi
Indonesian Journal of Science and Technology Vol 8, No 3 (2023): (ONLINE FIRST) IJOST: December 2023
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v8i3.60688

Abstract

Currently, carbon derived from biomass waste or residues is being intensively utilized as electrodes due to its excellent electrical properties, including high conductivity, appropriate porosity, and a specific surface area suitable for supercapacitor applications. Despite its advantages, the performance of supercapacitors made from biomass-derived carbon is insufficient for engineering applications because of the challenges in obtaining the mesoporous structure of activated carbon (AC). Therefore, this study highlights the potential of biomass-based carbon as the electrodes of a highly efficient supercapacitor, which can facilitate highly efficient current transport in energy storage systems. It comprehensively discusses various biomass material sources and activation methods to produce carbon, with a focus on the physical and electrical properties. Initially, the study discusses carbon activation methods and mechanisms to understand why activating agents and electrolyte solutions have a high specific surface area and specific capacitance. It then concentrates on the chemical activation method and its importance in making AC useful as an efficient electrode. Finally, in this study, various biomass sources were discussed to highlight the performance of supercapacitors electrodes originating from agricultural and wood residues relating to the specific capacitance and capacitance retention. Based on the obtained results, it is concluded that biomass-based carbon materials could be the most advantageous platform material for energy conversion and storage.
Co-Authors A. Subagio A. Subagio ACHEAMPONG, KENNEDY Ade Gafar Abdullah, Ade Gafar Ade Gaffar Abdulah Adjei, Albert Agus Subagio Ahmad Aminudin Aip Saripudin Ajuni B. Pantjawati Amiruddin Supu Ampimah, Benjamin Chris Andi Suhandi Andrivo Rusydi Apri Wiyono Arjuni B Pantjawati Arjuni Budi Pantjawati Asep Barnas Simanjuntak Ayub Subandi Baiquni, Muhammad Azhar Bambang Trisno Bonsu, Prince Osei- Brian Yuliarto Budi, Agus Heri Setya Chandra Wulandari Dadang Lukman Hakim Dedi Rohendi Edi Supriyanto Eka Pawinanto, Roer Elih Mulyana, Elih Enjang Akhmad Juanda F. S. Arsyad F. S. Arsyad Fauzan, Jahril Nur Febriana, Iqbal Fitri S. Arsyad Fitri S. Arsyad Fitri Suryani Arsyad Henny Henny Heri Sutanto Heru Yuwono Ida Hamidah Ida Hamidah Ida Hamidah Iqbal Febriana Ira Herli Khoeriah Irzaman, Irzaman Jumril Yunas Jumril Yunas, Jumril Kardiawarman Kardiawarman Lia Muliani Lia Muliani Lilik Hasanah Luqmanul Hakim M. Barmawi M. Barmawi M. Barmawi M. Barmawi M. Budiman M. Budiman Maman Budiman Mariya Al Qibtiya Markus Diantoro Moehamad Barmawi Mohamad Barmawi Muhammad Fadli Nasution Mujamilah Mujamilah Nada Sadidah Naftalia Trivenia Simbolon Nurhidayatulloh Nurhidayatulloh Nurhidayatulloh, Nurhidayatulloh Oduro-Okyireh, George Oduro-Okyireh, Theodore P. Arifin P. Arifin P. Arifin P. Susthita Menon Pangestu, M. Assadillah Pepen Arifin Rafi Jatnika Ramdhani Ramdhani Ratna Nurvitasari Rifqi Md Zain, Ahmad Roer Eka Pawinanto, Roer Eka Sahari, Siti Kudnie Sahbudin Shaari Setiawan, Agus Setyo Nugroho, Harbi Silmi At Thahirah Al Azhima Soegianto S Sri Jatno W Sri Jatno W Sugandi, Gandi Sukirno Sukirno Supriyadi, Tata Tommi Hariyadi, Tommi Tommi Haryadi Tommi Haryadi Tuti Suartini U. Hashim Wahyu Sasongko Putro Wawan Purnama Wawan Purnama Widyaningrum Indrasari Wulandari, Chandra Yadi Mulyadi Yuski Maolid Rizki Faozan Yusron Tri Huda Z. Jamal