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All Journal International Journal of Electrical and Computer Engineering TELKOMNIKA (Telecommunication Computing Electronics and Control) Indonesian Journal of Electrical Engineering and Informatics (IJEEI) JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Proceeding of the Electrical Engineering Computer Science and Informatics SINTECH (Science and Information Technology) Journal Indonesian Journal of Electrical Engineering and Computer Science SRIWIJAYA JOURNAL OF ENVIRONMENT International Conference on Sciences Development and Technology Journal of Multidisciplinary Academic and Practice Studies
Zainuddin Nawawi
Universitas Sriwijaya
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Other

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Development of Wireless Electric Field Mill for Atmospheric Electric Field Observation Muhammad Abu Bakar Sidik; Hamizah Shahroom; Zolkafle Buntat; Yanuar Zulardiansyah Arief; Zainuddin Nawawi; Muhammad Irfan Jambak
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 12, No 4: December 2014
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v12i4.977

Abstract

Rotating-vane electric field mill (REFM) sensor is one of the popular methods to measure atmospheric quasi-static electric field. Lightning incident occasion can be predicted by observing electric fields strength in atmosphere. In this paper an integration of REFM with an online wireless data monitoring system for long distance observation and data collection is presented. This method reduces the required man-hour to gather data from the REFM as well as system costs by removing the computer and data logger on-site. The development includes hardware and software design in order to improve efficiency the atmospheric electric field measurement system. The contribution of this work is the design of the electronic circuit which converts the ac signal from the REFM sensor to dc signal and then correlates the signal to the electric field strength in the vicinity. Subsequently the information is transmitted via a wireless data transmission system, using the Global System Mobile Communication (GSM) network. Using the proposed method, all the data from sensors can be observed and analysed immediately from any location.
Arduino-Uno Based Mobile Data Logger with GPS Feature Muhammad Abu Bakar Sidik; Mohd Qamarul Arifin Rusli; Zuraimy Adzis; Zolkafle Buntat; Yanuar Zulardiansyah Arief; Hamizah Shahroom; Zainuddin Nawawi; Muhammad ‘Irfan Jambak
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 13, No 1: March 2015
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v13i1.1300

Abstract

Lightning activity correlates with the formation of thunderclouds which increase the atmospheric electric field (AEF) between the cloud and the earth. Observations of the development of the AEF will allow the prediction of lightning activities close to a particular location. In research and development, the data logger plays an important role to observe and collect data from AEF sensors. The data logger must be reliable and effective. High investment costs are involved in acquiring a data logger, and choosing a suitable data logger is not easy. Institut Voltan dan Arus Tinggi (IVAT) is develeloping AEF sensor. Along with that sensor development a data logger development is also required. In this paper, a mobile data logger is developed by using Arduino-Uno. This mobile data logger is equipped with a GPS module, which provides accurate positioning in the collection of data. Laboratory and field tests were carried out to observe the performance of the mobile data logger system. The results showed that the developed data logger works properly.
The usage of thermoelectric generator as a renewable energy source Cekmas Cekdin; Zainuddin Nawawi; Muhammad Faizal
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 18, No 4: August 2020
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v18i4.13072

Abstract

Currently thermoelectric generators (TEG) are widely used in biomedical, military and space satellite power applications. TEG of high power plants are mostly used in automobile and industrial engines. This paper discusses TEG as a renewable energy source. Here the TEG in the application is used in the thermoelectric generator power plant. The working principle of this thermoelectric generator is on the heat side of the TEG peltier which is coated in metal in the form of aluminum, which is heated by a heater. And the cold side of the TEG Peltier is placed on the heat sink (as a heat dissipation metal). Heatsinks are submerged in water which are submerged about half or more. If the temperature of the metal being heated and the temperature of heat dissipation metal have a certain difference, then the temperature difference causes TEG to start working. The greater the temperature difference, the greater the electrical energy produced will be. However, if the temperature difference is too large it will damage the bismuth semiconductor material used. After TEG starts working it will produce voltage and current.
Lightning Air Terminal Collection Volume Assessment: A New Technique and Device Zainuddin Nawawi; Hussein Ahmad; Muhammad Abu Bakar Sidik; Lim Pai Hung; Aulia Aulia; Hamizah Shahroom; Muhammad Irfan Jambak
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 13, No 1: March 2015
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v13i1.1354

Abstract

For buildings, structures and facilities a Lightning Protection System (LPS) is very important. There are some components that affect the effectiveness of LPS. One of the components is the lightning air terminal. With reference to the facilities requiring lightning protection the position, the apparent height, and the angle of protection of lightning air terminals determines the collection volume (CV) of the protected area. The CV of direct strike lightning air terminals can change because of the facility is affected by natural disasters such as seismic tremor and flood. If such natural disasters do happen, there are possibilities that the facilities will not be fully protected from direct lightning strikes. The building and structure could be misalignment after the seismic tremor and flood related to earth movement. So for the safety of equipment and personnel, lightning protection system efficacy assurance is necessary. Therefore, there should be a technique and device to monitor the variation of collection volume afforded by every lightning air terminal on buildings and structures after the occurrence of a natural disaster. This paper presents a new technique as well as a new device to monitor the collection volume variation. A part of the device was obtained from a recycled moveable television antenna. This approach is not only practical, portable and cost effective but also incorporating the idea of environmental protection and recycling of used plastic materials.
Development of Blumlein Line Generator and Reactor for Wastewater Treatment Zainuddin Nawawi; Muhammad Abu Bakar Sidik; Zolkafle Buntat; S. M. Zafar Iqbal; Hashem Ahmadi; Muhammadjavad Mobarra
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 11, No 3: September 2013
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v11i3.952

Abstract

There are several wastewater treatment methods and techniques which have been introduced such as by using biological, chemical, and physical process. However, it is found that there are some shortcomings in the current available methods and techniques. For instance, the application of chlorine can cause bacterial disinfection but produce secondary harmful carcinogenic disinfection. In order to acquire a better understanding in wastewater treatment process, a study of wastewater treatment system and hybrid discharge reactor to acquire gas liquid phase corona like discharge is carried out. In addition to the laboratory experiment, designing and development of the Blumlein pulse power circuit and modification of reactor for wastewater treatment are accomplished as well. The Blumlein pulse power circuit generates nanosecond high voltage pulses. The Hybrid Discharge reactor can produce both spark discharge in gas phase and liquid phase (spark-spark discharge). Analysis of the emission spectrum of the occurring discharge found the existence of various chemicals such as OH radicals. In addition, a drastic improvement in terms of oxygen content and conductivity level of the wastewater sample is also observed. 
Structural and Optical properties of Multiwalled Carbon Nanotubes Modified by DBD Plasma at Atmospheric Pressure Norain Sahari; Zolkafle Buntat; Zulkifli Azman; Zainuddin Nawawi; Muhammad Abu Bakar Sidik; Muhammad Irfan Jambak
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 16, No 1: February 2018
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v16i1.5945

Abstract

Structure, chemical, and physical properties of Multiwalled Carbon Nanotubes (MWCNTs) after modification by dielectric barrier discharge (DBD) at atmospheric pressure is investigated using Transmission Electron Microscopy (TEM), Raman and Uv-vis-NIR spectroscopy. Effects of plasma treatment time on MWCNTs are analyzed. TEM result shows that during the short period of plasma treatment time of 5 minutes, the tube surface experienced a few damages. With increase in plasma treatment time, the tube surface is damaged to a certain extent. Intensity ratio, ID/IG through Raman analysis shows a good agreement with TEM. The values of ID/IG of the modified MWCNTs are larger than those of pristine MWCNTs. An increase of ID/IG indicates that considerable defects are produced on the surfaces of MWCNTs. The treated MWCNTs has energy band gap compared to zero band gap of untreated MWCNTs. It is believed that the defect site of MWCNTs can modify the electronics properties of MWCNTs from being metallic to semiconducting structure, which is applicable for almost all electronics device applications.
NO2 Gas Sensing Properties of Carbon Films Fabricated by Arc Discharge Methane Decomposition Technique Elnaz Akbari; Zolkafle Buntat; Syed Muhammad Zafar Iqbal; Zulkifli Azman; Norain Sahari; Zainuddin Nawawi; Muhammad Irfan Jambak; Muhammad Abu Bakar Sidik
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 16, No 1: February 2018
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v16i1.6004

Abstract

In this work, a set of experiments has been conducted using arc discharge Methane decomposition attempting to obtain carbonaceous materials (C-strands) formed between graphite electrodes. The current-voltage (I-V) characteristics of the fabricated C-strands have been investigated in the presence and absence of two different gases, NO2 and CO2. The results reveal that the current passing through the carbon films increases when the concentrations of gases are increased from 200 to 800 ppm. This phenomenon is a result of conductance changes and can be employed in sensing applications such as gas sensors.
Optimum Switching Angle Of Switched Reluctance Motor Using Response Surface Methodology Agus Adhi Nugroho; Muhammad Khosyi'in; Bustanul Arifin; Bhakti Yudho Suprapto; Muhamad Haddin; Zainuddin Nawawi
Indonesian Journal of Electrical Engineering and Informatics (IJEEI) Vol 9, No 4: December 2021
Publisher : IAES Indonesian Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52549/ijeei.v9i4.3321

Abstract

Switched Reluctance Motor has numerous advantages compared to another electric motor. Simple structure, low-cost production, robustness, and high fault tolerance have been remarkable milestones. Still, the problem of excitation angle at power converter becomes crucial, especially for traction use, requiring higher torque at low speed for starting and acceleration. Therefore, this research emphasized finding the optimum excitation angle at low speed using Response Surface Methodology, a practical application to achieve the highest torque, as indicated by the best speed in the constant torque region. As a result, using Matlab simulation, the adaptive combination of optimum angles reached 2691 rpm quicker than a single excitation angle with 2568 rpm, an increase of 4.79% higher speed using RSM optimization. According to the experimental data, the adaptive combination of optimum angle achieved 2475 rpm better than the single excitation angle reached 2340 rpm, an increase of 5.77% higher speed using the Response Surface Methodology.
Mobile Data Logger with GPS Feature for Ground Atmospheric Measurement Muhammad Abu Bakar Sidik; Mohd Qamarul Arifin Rusli; Zuraimy Adzis; Zolkafle Buntat; Yanuar Arief; Hamizah Shahroom; Zainuddin Nawawi; Muhammad Irfan Jambak
Proceeding of the Electrical Engineering Computer Science and Informatics Vol 1: EECSI 2014
Publisher : IAES Indonesia Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (900.575 KB) | DOI: 10.11591/eecsi.v1.418

Abstract

The data logger system plays an important role in research and development. In order to obtain valid data, the data logger must be reliable and effective. High investment costs are involved in acquiring a data logger, and choosing a suitable data logger is difficult. In this paper, a mobile data logger is developed by using Arduino-Uno. This mobile data logger is equipped with a GPS module, which provides accurate positioning in the collection of data. Laboratory and field tests were carried out to observe the performance of the mobile data logger system. The results showed that the performance of this system was acceptable.
Partial Discharge Monitoring System on High Voltage Equipments using Electroacoustic Technique W. M. S. W. Mahmood; Yanuar Z. Arief; Zuraimy Adzis; Nor Asiah Muhamad; Muhammad Abu Bakar Sidik; Zainuddin Nawawi
Proceeding of the Electrical Engineering Computer Science and Informatics Vol 1: EECSI 2014
Publisher : IAES Indonesia Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (894.596 KB) | DOI: 10.11591/eecsi.v1.424

Abstract

Partial discharge (PD) monitoring system is considered as one of the most promising solutions for monitoring and detecting possible faults. PD is able to diagnose faults within the system in the most fundamental and simplest way. PD monitoring and measurement of high voltage equipment substations panel and power transformers have not gained the same attention in the electrical community as compared to those of rotating machines. PD tests are conducted on-site to verify the insulation of bushings, termination box and windings. The cost of an unexpected outage may be considerably more significant for a high voltage substation panel and power transformers system than just for a single motor failure. In this research, the electroacoustic PD monitoring technique is used, which is a combination of internal PD detection and ultrasound or surface PD detection was used. The testing equipment which will be used in this research is UltraTEV Plus+ equipment from EA Technology. Result shows the transient earth voltage (TEV) PD magnitude fluctuates with time. Significant high value of PD magnitude (> 19 dB) was detected and recorded at several switchgear panel and transformer. However, for the ultrasound or surface PD, from the monitoring and measurement record, no detection of PD signal was recorded at the UltraTEV Plus+ testing equipment
Co-Authors ., Aulia ., Aulia Abduk-Malek, Zulkurnain Abu Bakar Sidik, Muhammad Abu Bakar Sidik, Muhammad Abu Bakar Sidik, Muhammad Adzis, Zuraimy Adzis, Zuraimy Agus Adhi Nugroho Agustini, Meily P Ahmad, Hussein Arief, Yanuar Arifin Rusli, Mohd Qamarul Asiah Muhamad, Nor Aulia . Aulia . Aulia Aulia ‘Irfan Jambak, Muhammad ‘Irfan Jambak, Muhammad Bhakti Yudho Suprapto Buntat, Zolkafle Buntat, Zolkafle Bustanul Arifin Cekmas Cekdin, Cekmas D. R. Yuniarti Eka Nuryanto Budi Susila Elnaz Akbari Ferlian Seftianto Fitria, Syarifa Hamizah Shahroom Hamizah Shahroom Hamizah Shahroom Hamizah Shahroom Hashem Ahmadi Hussein Ahmad Hussein Ahmad Ida Sriyanti Jaidan Jauhari Jambak, M. Irfan Jambak, Muhammad Irfan Jambak, Muhammad Irfan Lim Pai Hung Lim Pai Hung M. I. Jambak Mahmood, W. M. S. W. Maulana, Muhammad Bintang Meily P Agustini Mohd Qamarul Arifin Rusli Muhamad Haddin Muhammad Abu Bakar Sidik Muhammad Abu Bakar Sidik Muhammad Abu Bakar Sidik Muhammad Abu Bakar Sidik Muhammad Abu Bakar Sidik Muhammad Abu Bakar Sidik Muhammad Faizal Muhammad Irfan Jambak Muhammad Khosyi'in Muhammad Khosyi'in Muhammad ‘Irfan Jambak Muhammad ‘Irfan Jambak Muhammad ‘Irfan Jambak Muhammadjavad Mobarra N. F. A. Isa Nor Asiah Muhamad Norain Sahari Pai Hung, Lim Putra, Dian Eka Putra, Dian Eka R. F. Kurnia Rizda Fitri Kurnia, Rizda Fitri S. M. Zafar Iqbal Shahroom, Hamizah Shahroom, Hamizah Shahroom, Hamizah Sidik, Muhammad Abu Bakar Sri Arttini Dwi Prasetyawati Sukemi Sukemi Syed Muhammad Zafar Iqbal W. M. S. W. Mahmood Yanuar Arief Yanuar Z. Arief Yanuar Zulardiansyah Arief Yanuar Zulardiansyah Arief Z. Arief, Yanuar Z. Buntat Zolkafle Buntat Zolkafle Buntat Zulardiansyah Arief, Yanuar Zulkifli Azman Zulkurnain Abduk-Malek Zuraimy Adzis Zuraimy Adzis