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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) TELKOMNIKA (Telecommunication Computing Electronics and Control) Bulletin of Electrical Engineering and Informatics Indonesian Journal of Electrical Engineering and Computer Science
Kian Sek Tee
Universiti Tun Hussein Onn Malaysia
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering

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Dimmer and neon transformer as a power controllable generator for atmospheric pressure plasma jet Rosnah Mohd Zin; Chin Fhong Soon; Nadhia Mohd Yusof; Elfa Rizan Rizon; Kian Sek Tee; Mohd Khairul Ahmad; Nafarizal Nayan
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 10, No 2: June 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (405.949 KB) | DOI: 10.11591/ijpeds.v10.i2.pp594-601

Abstract

The feasibility of a dimmer and neon transformer to provide power control to the atmospheric pressure plasma jet (APPJ) is presented in this paper. The standard neon transformer was previously shown applicable to power up a plasma torch to generate plasma irradiation of an APPJ at 8.64kv and 35kHz. However, the plasma emission is not controllable. In this study, a lamp dimmer was proposed to function as a power controller to the neon transformer which drives the generation of plasma and discharged with argon gas. With the dimmer output voltage adjustable from 60 - 220V, the power and current of the dimmer were variable from 8.4 to 83.6 W and 0.08 and 0.38 A, respectively. The temperature measured at the quartz tube and sample exposure site were less than 50oC suggested that the APPJ produced were non-thermal. A simple test by exposing plasma plume to a leaf sample showed that the plasma produced were non-damaging to the leaf. This portable system can provide control to the APPJ and applicable for bioengineering studies. 
A Portable Insole Pressure Mapping System Kian Sek Tee; Yogindra Syam Hari Javahar; Hashim Saim; Wan Nurshazwani Wan Zakaria; Safinaz Binti Mohd Khialdin; Hazlita Isa; M. I. Awad; Chin Fhong Soon
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 15, No 4: December 2017
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v15i4.7227

Abstract

The human locomotion is studied through gait analysis and is best observed instrumentally rather than observing visually. Thus, a portable insole pressure mapping system is built to assist in studying the human gait cycle. The pressure distribution is determined by instrumentally mapping the insole using force sensitive resistive sensors that are connected to Arduino UNO via cables. The values are saved into a secure digital card that could be post processed. Hardware and software design phase are executed for the development of this project. The outcomes match to the knowledge of human gait definitions in static posture and normal walking.
Investigation of wireless magnetometer in sensing magnetic field changes at different car direction and speed Chin Fhong Soon; Siti Hajar Aminah Ali; See Khee Ye; Munzilah Md Rohani; Kian Sek Tee; Marlia Morsin; Nafarizal Nayan; Chiok Chuan Lim
Bulletin of Electrical Engineering and Informatics Vol 10, No 2: April 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v10i2.2707

Abstract

The embedment of induction loop underground for traffic volume monitoring caused damaging effects to the road and reduced road surface aesthetics. A wireless magnetometer implanted underground in a small uniform area was developed to detect three-axis magnetic flux changes due to the perturbation of vehicle passing over the sensor. In this project, a wireless magnetometer sensor system operating at a radio frequency of 2.4 GHz for detecting and transmitting Z-field data has been developed to investigate the patterns of magnetic field associated with the car directions and speed. This is the first report in revealing the responses of the sensor to different car speed and sensing directions. Field tests were conducted by car passes over in a direction in-line or countering the X and Y axes of the magnetometer. The results showed that the strong magnetic field density as low as -100 to -230 μT could be generated when a car passed over the sensor in a direction countering X and Y axes. The speed detection limit of the sensor is less than 60 kmph. The X, Y and Z flux patterns obtained is import in designing an algorithm for accurate detection and counting of vehicles.
A posture monitoring system with IMU for ophthalmologist while operating the slit lamp Kian Sek Tee; Eugene Low; Wellesly Tony; Safinaz Binti Mohd Khialdin; Jaysuman Bin Pusppanathan; Chin Fhong Soon; Toong Hai Sam
Indonesian Journal of Electrical Engineering and Computer Science Vol 18, No 3: June 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v18.i3.pp1262-1269

Abstract

The posture monitoring system monitors the posture changes of the upper body and the spinal cord applying to ophthalmologists while operating the slit lamp. The motivation to the pursuit of this system is to relate posture changes while in a static sitting posture to the spinal deviation from the g-line. Often times, the spinal deviation from the g-line is classified as bad posture because of the shift in weight distribution on the spine causing pain and discomfort in certain areas of the spine. This paper presents the design concept, the development process and the working principle of the posture monitoring system using Inertial Measurement Unit (IMU) sensor. The raw measurement data obtained from human trials is tabulated and converted into a graphical representation in which all postures can be identified and distinguished by referring the relative wave pattern. The procedure is important in the improvement on the posture monitoring system for the human trials on the ophthalmologist in future.
Co-Authors Chin Fhong Soon Chin Fhong Soon Chiok Chuan Lim Elfa Rizan Rizon Eugene Low Hashim Saim Hazlita Isa Jaysuman Bin Pusppanathan M. I. Awad Marlia Morsin Mohd Khairul Ahmad Munzilah Md Rohani Nadhia Mohd Yusof Nafarizal Nayan Rosnah Mohd Zin Safinaz Binti Mohd Khialdin Safinaz Binti Mohd Khialdin See Khee Ye Siti Hajar Aminah Ali Toong Hai Sam Wan Nurshazwani Wan Zakaria Wellesly Tony Yogindra Syam Hari Javahar