UniMAP RIS :: Browsing Conference Publications by Issue Date

This project is related to design of sorting facility for reducing, reusing, recycling green waste material, and in particular to invent an automatic system to distinguish household waste in order to separate them from the main waste stream. The project focuses on thorough analysis of the properties of green household waste. The method of identification is using capacitive sensor where the characteristic data taken on three different sensor drive frequency. Three types of material have been chosen as a medium of this research, to be separated using the selected method. Based on capacitance characteristics and its ability to penetrate green object, optimum identification method is expected to be recognized in this project. The output capacitance sensor is in analogue value. The results demonstrate that the information from the sensor is enough to recognize the materials that have been selected.

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Publication

Assessment of functional and dysfunctional on implant stability measurement for quality of life

( 2017)

Norshahrizan Nordin

;

Razli Che Razak

;

Mohd. Mustafa Al Bakri Abdullah

;

Muhammad Safizal Abdullah

;

Fauziah Che Mat

;

Abdul Hamid Adom

This study was conducted to investigate the effect of an implant wearer comprising among orthopedic patients as well as the use of implant dentistry in Northern Malaysia. A total of 100 questionnaires were distributed and 70 questionnaires can be used to record, analyze and test hypotheses. Data for all variables were collected through a questionnaire administered alone and analyzed by using SmartPLS V3. A total of four (4) hypotheses have been formulated and the results show that the hypothesis is supported. The results show that: (1) limit the functionality and quality of life was significantly (0.904) in connection with the implant wearer, (2) physical pain was significantly (0.845) relating to the quality of life, (3) physical discomfort was significantly (0.792) in connection with quality of life, and also (4) social discomfort is significant as well (0.809). This finding suggests that there are positive effects on the implant wearer who through life routine. The results of the study may also serve as a basis for reliable decisions related to quality of life and for the implementation of awareness campaign that increase how the need for humanity in the field of quality involvement.

Publication

Integration of asset tracking system through trilateration method as detection mechanism

( 2019)

M A Fadzilla

;

Shahriman Abu Bakar

;

Azizi Harun

;

Mohd Sani Mohamad Hashim

;

Zuradzman Mohamad Razlan

;

Wan Khairunizam Wan Ahmad

;

Z. Ibrahim

;

Abu Hassan Abdullah

;

J.S.C Turner

;

K.A.A Kassim

;

M.S.A Khalid

;

Z. Jawi

;

M.H.M Isa

;

Rizalafande Che Ismail

Demands for localization system has been growing rapidly in the last several years both for an outdoor and indoor area. In conjunction with this, the capability and reliability of this system to precisely locate and track objects of interest for the indoor area has catered researchers and study on how to do so. One of the major ideas on making it more advance is by incorporating the use of wireless devices into the system. There are numbers of issues that could interrupt the efficiency and success of the system. One of the main problems is the signal loss mainly caused by the attenuation of the signal as they propagate through from the transmitter to the receiver. These attenuations are mostly due to the surface types the signal are traveling on and the objects that are in the Line of Sight in between the transmitter and receiver. In order to ensure the most reliable and efficient wireless connection between transmitter and receiver, a propagation study on the signal is needed for us to analyze and find the best way to trade off the signal attenuation based on the environment surrounding the system. By doing so, a thorough system that has models that can work efficiently even if we are to consider the attenuation factors. The system consists of nodes installed inside the research institute that acts as both transmitter and receivers. The transmitter and receiver will then process the signal that will then determine their location. The receiver is connected to the laptop in order to get a real-time reading so that we will be able to locate the transmitter. A networked of nodes are installed inside the research institute for experiment and the layout of the research is conferred for future references. Data from the experiment are then analyzed and a model for the signal propagation alongside the research institute is created. This model will be able to apprehend the signal attenuation despite the surrounding environment such as furniture and walls. A completed asset tracking system with models of signal attenuation will be built in the future for a more efficient signal transmission.

Publication

An overview on overvoltage phenomena in power systems

( 2019-06-28)

N. S. Othman

;

Mohamad Nur Khairul Hafizi Rohani

;

Mustafa W. A.

;

Wooi Chin Leong

;

Afifah Shuhada Rosmi

;

Shakur N.F.M.

;

Juliangga R.

;

Wan Khairunizam Wan Ahmad

;

Zunaidi I.

;

Zuradzman Mohamad Razlan

;

Shahriman Abu Bakar

Overvoltage happens in a condition where the voltage is increased and exceed its design limit. This situation may lead to harmful damage to machines or related equipment that connected to the system. Overvoltage can exist in a form of transient, voltage spike or permanent, depending on its duration. Types of overvoltage consist of lightning overvoltage and switching overvoltage. Overvoltage that caused by lightning is considerate as natural phenomena, while switching overvoltage exists from the system itself, either by the interruption of faults or inappropriate connection of circuit breaker contacts. This paper is discussed about overvoltage phenomenon including causes and effects of overvoltage and overvoltage protection towards power system.

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Publication

Develop portable blood analyzer based on temperature and quantity level

(IOP Publishing, 2020)

Muhammad Amar Farhan Sukemi

;

Wan Azani Wan Mustafa

;

Muhammad Zaid Aihsan

;

Zol Bahri Razali

;

Syed Akhmal Syed Jamalil

;

Syahrul Affandi Saidi

This technical paper presents a developing portable blood analyzer for monitoring of human blood sample. Perseverance of blood sample in hospitals is important in order to obtain a great quality of blood and therefore it able to determining the human type of disease. This is a life-threatening early step in most medical applications fields such as diagnosis, treatment and medical research. The proposed system consists of three main parts. In the first part, the use of convenient and handy device to deal with the problem of incorrect temperature value and inadequate quantity of blood sample. Most of previous human hospitality services show a fail to handle and properly in time to take human blood sample for diagnosis in a schedule time frame such as not punctual in taking blood sample from a patient in three different times in one day. The consequences is that these blood sample are not in perfect quality for a correct estimation of the human disease towards a pathology unit. The proposed method is a device that uses infrared temperature system and non-contact blood sample quantity detection. In the second part is by combining those two approaches to single programmable electronic modules that are used to minimize the size of the portable device in the resulting techniques to improve the functionality. The third part is accomplished by using a modern technique to produce an interface to provide the value of human blood sample and shows it on display for monitoring purposes. The programmable coding has been test in several different types of sensors and physical part. The experimental results show that this method able to integrate both requirement of human blood sample perseverance with a contactless method towards a blood tube, providing the output value of quality characteristic in a display and making it well-suited for a convenient practical application system. The experimental results in real time applications shows the effectiveness, reliable and efficiency in the proposed approach which able to almost accurately detect and monitor the human blood sample with the ability to detect different types of people gender and blood type. The proposed coding system can be executed at more precise time scheduling which is better than real life human monitoring system.

Publication

Comparative study of optimization algorithms for SHEPWM five-phase multilevel inverter

(Institute of Electrical and Electronics Engineers (IEEE), 2020)

Muhammad Aniq Shahmi Bin Bimazlim

;

Baharuddin Ismail

;

Muhammad Zaid Aihsan

;

Siti Khodijah Mazalan

;

Muhammad Sirajuddin Muhammad Azhar Walter

;

Mohamad Nur Khairul Hafizi Rohani

Conversion of DC to AC is widely used as an essential need for the power system to harness renewable power source in this era. Multilevel inverter is a mechanism which capable of harnessing these renewable energies. Unfortunately, harmonics occur in the system due to distortions and causing much unwanted problems at the power output. Therefore, the elimination of harmonics and reduce Total Harmonics Distortion (THD) are needed to maintain good power output. Application of Selective Harmonics Elimination Pulse Width Modulation (SHEPWM) can be used in the multilevel inverter to solve the problem. In this paper, optimization algorithms such as Particle Swarm Optimization (PSO), Whale Optimization Algorithm (WOA) and Sine Cosine Algorithm (SCA) were applied for finding suitable switching angle for SHEPWM. The calculated switching angle was applied into seven-level five-phase multilevel inverter for various modulation indexes. In addition, the simulation of the multilevel inverter also done using PSIM software. The results show that the selective lower order harmonics, 3rd and 7th are completely eliminated for all three algorithms. In addition, the time taken for newly discovered algorithms to find switching angles for seven-level five-phase inverter is faster compared to PSO.

Publication

Feasibility, sizing and economic analysis of solar energy system for green Swinburne campus

(Institute of Electrical and Electronics Engineers (IEEE), 2020)

Mohamed Ashfaaq Riphque

;

Hadi Nabipour-Afrouzi

;

Wooi Chin Leong

;

SanChuin Liew

;

Kamyar Mehranzamir

;

Jubaer Ahmed

In 2011 alone, Malaysia has spent a hefty RM14.5 billion in buying fossil fuels to generate electricity. With the cost of fossil fuels rising each year, the nation is looking to rely on more sustainable energy sources. One way to decrease the reliance on fossil fuel is to minimize electricity consumption or use renewable energy sources. This research tests if it is feasible to run the Swinburne campus with Solar photovoltaic (PV) cells. This study aims to design and implement a PV energy system to power Swinburne University of Technology Sarawak. The design of the PV system is performed with the collection of the solar irradiance in Kuching, load profile of the Campus and the area required to layout the panels. Block-E of Swinburne is chosen for the PV system since all Swinburne blocks together consume very high power and do not have the required area for the panels. A Grid-Tied system is considered for the PV design. MATLAB software is used to size the PV system. Economic analysis such as Levelized Cost of Energy (LCOE), Life Cycle Cost Analysis (LCCA) and payback period is studied for the PV system.

Publication

Development of biomass-fueled cogeneration systems for off-grid electrification

(Institute of Electrical and Electronics Engineers (IEEE), 2020)

Mohammad Ali Bagherian

;

Kamyar Mehranzamir

;

Jubaer Ahmed

;

Marwan Nafea

;

Hadi Nabipour-Afrouzi

;

Wooi Chin Leong

Over the past centuries, discovery and utilization of fossil fuels has revolutionized the world pushing societies towards modernization. This source of energy that is being referred as black gold, has faced extensive consumption which consequently started to underpin the acceptance of the negative effects of our carbon society and its likely demise. Fossil fuels have costed the safety and overall health of our environment, causing serious consequences such as global warming and unsustainability. To this end, in the search for alternative generation, the potential of renewables was realized and hence, exploited in the energy sector. In recent times, development of efficient prime movers and possible utilization of renewable energy resources for both power and heat production introduced the concept of cogeneration to the energy sector. Accordingly, this comparative research elaborates on utilization of the most available and versatile renewable energy, biomass, in combined heat and power technology. There is no doubt that the integration of bioenergy and cogeneration is associated with significant advantages, namely: lower environmental impacts and primary energy savings. In this context, four different biomass-fueled configurations are developed for the purpose of electrifying the Masset village in Canada. Two well-known methods of: Direct Combustion and Gasification are considered in the model development. Further, a comparative conclusion is drawn from economic perspective.

Publication

Solar powered multiple output buck converter

(IOP Publishing Ltd, 2020)

Muhammad Zaid Aihsan

;

Norhanisa Kimpol

;

Liew Hui Fang

;

Muhammad Izuan Fahmi Romli

;

Wan Azani Wan Mustafa

;

Junaidah Ali Mohd Jobran

;

Mohamed Mydin Hj M.Abdul Kader

Times have certainly changed over the past few decades, now it seems that technology is getting more compact and efficient. The modern outdoor enthusiast such as hikers, climbers has a problem regarding the lack of power supply to power up electronics when they go for adventure activities. In order to solve this problem, this paper design and develop DC/DC buck converter system to drop down the voltage from the solar photovoltaic (PV) system from 12VDC into 5VDC. This paper is first to start up with design and simulation circuit using simulation to test outcome of this paper in the range of 5VDC & 1.0A and 5VDC & 0.5A. A battery storage is needed to feed electricity independent and battery management of the battery is needed to improve the performance of battery life. This can be done by adding a charge controller unit. The outcome of this paper allows the battery to be charged using the solar panel and at the same time can produce multiple outputs for low voltages used. The software simulation has been done to shows this system produces two different output and the hardware will be developed based on the software results. Software and hardware result, both will be compared and analysed.

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Publication

Wind characterization by three blade savonius wind turbine using IoT

(IOP Publishing, 2020)

Liew Hui Fang

;

Abd R Rosemizi

;

Muhammad Zaid Aihsan

;

Muzamir Isa

;

Baharuddin Ismail

Fuel has become one of the vital energy in our life and reserves on the earth is lessened years by years. However, still wind that is renewable resource which is clean energy that can replaced a fuel. In this paper, novel idea to monitor the environmental condition and working conditions are characterized by using the small three blade Savonius wind turbines with Internet of Things (IoT) is proposed. Therefore, in terms of characterization, controlling and monitoring the status of wind turbine systems are recommended from anywhere in the world using Internet of Things (IoT) technology. In all repair work, this system is declared with IoT application and ESP 8266 to monitor, capture and diagnose problems in wind turbine. This allows the user to have a remote control mechanism remotely via secure internet web connection. This system helps users control energy sources, manually and remotely using smartphones or personal computers. This work is related to the transmission of data between two units in a timely and fast time without any disturbance. Wind turbine performance has a number of factors which determine its reliability. Next, a system for analyzing the data resulting from the rotation of the wind turbine from a distance is needed so that the study can take place at any time. The parameters that been measured using ESP8266 is voltage, current, power and wind speed. When turbine generate electric, it will display the output by thinkspeak. Various challenges, material of wind turbine and methods for condition monitoring were discussed and the results were analyzed with statistical measures and compared with its standard values.

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Publication

Effect of environmental temperature and humidity on different metal oxide gas sensors at various gas concentration levels

(IOP Publishing Ltd., 2020)

Abdulnasser Nabil Abdullah

;

Kamarulzaman Kamarudin

;

Syed Muhammad Mamduh Syed Zakaria

;

Zaffry Hadi Mohd Juffry

;

Abdul Hamid Adom

Metal Oxide (MOX) semiconductor gas sensors have been widely used in monitoring targeted gases that are present in the environment. This type of gas sensor can also be utilized as a safety device to detect the source of gas leakage. Their uses in many applications are due to being user-friendly, lower in cost, high sensitivity and relatively quick response time. However, there are several factors that could affect their performance. This work investigates the effects of the changes in ambient temperature and humidity on the readings of these sensors at various gas concentration levels. A PCB board was developed, which consists of temperature and humidity sensors, as well as eight different MOX gas sensors (TGS2600, TCS2602, CCS803, MiCS552, GM-402B, GM-502B, GM-702B and MiCS6814). The board was subjected to various temperatures (16˚C to 30˚C) and humidity levels (45% to 75%). At each of these parameter settings, the gas sensor responses were recorded at different ethanol gas concentrations. The results of the study showed that the temperature and humidity affected all the gas sensor response. The magnitude of the sensors responses was observed to decrease with rising temperature and humidity levels, except for MICS6814 (NH3 sensor) which responses in the opposite manner. Hence, there is the need to take into consideration of the drift of gas sensors’ responses when there are changes in temperature and humidity.

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Publication

Comparative analysis between chaos theory method and power system for WPT energy security application

(AIP Publishing, 2020)

N. H. Hussin

;

M. M. Azizan

;

Rafikha Aliana A Raof

This paper reviews the techniques used in Wireless power transfer (WPT). WPT is one of the most useful ways to transfer power. Based on power transfer distances, the WPT system can be divided into three categories, namely, near medium, and far fields. Inductive coupling and capacitive coupling contactless techniques are used in the near-field WPT magnetic resonant coupling technique is used in the medium-field WPT. Electromagnetic radiation is used in the far-field WPT. In addition, energy encryption plays a major role in ensuring that power is transferred to the true receiver. Therefore, this paper reviews the energy encryption techniques in WPT system. A comparison between different technique shows that the distance, efficiency, and number of receivers are the main factors in selecting the suitable energy encryption technique.

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Publication

Review on RTV silicone rubber coatings insulator for transmission lines

(IOP Publishing Ltd., 2020)

Siti Huzaimah Kamal Hamadi

;

Muzamir Isa

;

Syahrun Nizam Md Arshad @ Hashim

;

Mardianaliza Othman

Nowadays, the usage of RTV Silicone Rubber as Insulator coatings are increased due to its advantages to avoid pollution flashover of contaminated insulator. Besides, the coatings can reduce the maintenance cost and scheduled routine. This paper had introduced the advantage of RTV Silicone Rubber coatings on insulator, such as good adhesion, nominal thickness range and good hydrophobicity. There are three method of coatings application, such as brushing, spraying and dipping. Suitable method is used to specific insulator application. Meanwhile, this paper also explained about installation of coated insulator in the field.

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Publication

A new method of rice moisture content determination using voxel weighting-based from radio tomography images

( 2021)

Nurul Amira Mohd Ramli

;

Mohd Hafiz Fazalul Rahiman

;

Latifah Munirah Kamarudin

;

Latifah Mohamed

;

Ammar Zakaria

;

Anita Ahmad

;

Ruzairi Abdul Rahim

This manuscript presents a new method to monitor and localize the moisture distribution in a rice silo based on tomography images. Because the rice grain is naturally hygroscopic, the stored grains’ quality depends on their level of moisture content. Higher moisture content leads to fibre degradation, making the grains too frail and possibly milled. If the moisture is too low, the grains become brittle and are susceptible to higher breakage. At present, the single-point measurement method is unreliable because the moisture build-up inside the silo might be distributed unevenly. In addition, this method mostly applies gravimetric analysis, which is destructive. Thus, we proposed a radio tomographic imaging (RTI) system to address these problems. Four simulated phantom profiles at different percentages of moisture content were reconstructed using Newton’s One-Step Error Reconstruction and Tikhonov Regularization algorithms. This simulation study utilized the relationship between the maximum voxel weighting of the reconstructed RTI image and the percentage of moisture content. The outcomes demonstrated promising results, in which the weighting voxel linearly increased with the percentage of moisture content, with a correlation coefficient higher than 0.95 was obtained. Therefore, the results support the possibility of using the RTI approach for monitoring and localizing the moisture distribution inside the rice silo.

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Publication

Effect of distributed generation to the faults in medium voltage network using ATP-EMTP simulation

( 2021-01-01)

Wan Syaza Ainaa Wan Salman

;

Mohd Rafi Adzman

;

Muzamir Isa

;

Nur Syazlin Bakhtiar Jamili

;

Muhd Hafizi Idris

;

Melaty binti Amirruddin

During past few years, distributed generation (DG) technology has been widely known in the industry as it can helps in providing backup power during high power demand. However, adding a new system may changes the traditional power system that are usually work in one direction which is from the generation to the consumer. When DG is added, the power flows from two direction. Therefore, a short circuit study was done to study the effects of DG to the local system during fault. An IEC Standard was also calculated as guidance to determine the thermally permissible of a cable.

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Publication

Flashover voltage prediction on polluted cup-pin the insulators under polluted conditions

( 2021-01-01)

Salem A.A.

;

Abd-Rahman R.

;

Kamarudin M.S.

;

Othman N.A.

;

Jamail N.A.M.

;

Nuriziani Hussin

;

Haziah Abdul Hamid

;

Rawi I.M.

The natural pollution which is mainly affected by the weather conditions are the main cause of flashovers on high voltage insulators leading to outages in power systems. In this work, characteristics of flashover for contaminated cup-pin insulators have been studied based on experiential test and a mathematical model. Information from laboratory test combined with new mathematical model results are used to define Artificial Neural Network (ANN) algorithm and Adaptive Neuro-fuzzy Inference System (ANFIS) for calculated the flashover characteristics (current IF and voltage UF). several of experiments and measurement are carried out for 1:1, 5:1, 10:1 and 15:1 ratios of bottom to top surface salt deposit density on contaminated samples (z). Dimensional Analysis Method (DAM) was used to derive new model for the variables which often effective in the flashover phenomenon of polluted insulators. The model was derived by establishment the relationship between flashover voltage UF and current IF, length of pollution layer LP, exposure time t, arc constant A and layer pollution conductivity of insulator σ. The both arc constants A and n is computed using genetic algorithm. Comparative investigates have clearly shown that the approach AI-based method gives the agreeable results compared to the mathematical model.

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Publication

Analysis on renewable energy sources for electricity generation in remote area of Iraq by using HoMER: A case study

( 2021-05-03)

Zaidoon Waleed Jawad Al-Shammari

;

Muhammad Mokhzaini Azizan

;

Ahmad Shukri Fazil Rahman

;

Khairunnisa Hasikin

Zerbattiya is one of the remote areas in Iraq that have retained their old generation stations and networks despite their expansion. As the rehabilitation of these stations and networks is extremely costly, supplying renewable energy sources to these regions is reasonable. The problem in Zerbattiya is that electricity supply comprises 75% of the total energy load. In this regard, we propose the use of a hybrid system using renewable energy with the national grid as a means of compensating for power supply shortage. The proposed system composed of grid, wind turbines, solar panels, converters, batteries, and auxiliary tools. The most optimal system configuration was determined with HOMER. Meanwhile, the average life expectancy of the proposed system is 20 years. Three on-grid scenarios were considered for power generation. The most suitable system was determined in WT-grid hybrid systems. The results showed that the NWT, NBT, Nconv, COE, NPC, Operating cost, and IC are 61, 4, 12, 0.0349 US$/KWh, US$1.32 million, 23,982 US$/year, and US$1.05 million respectively.

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Publication

Assessment of Control Drive Technologies for Induction Motor: Industrial Application to Electric Vehicle

( 2021-06-11)

Ahmad Firdaus Ahmad Zaidi

;

Syahrul Ashikin Azmi

;

Kamarulzaman Kamarudin

;

Leong Jenn Hwai , Jenn

;

Hasimah Ali

;

Mohd Shuhanaz Zanar Azalan

;

Zamri Che Mat Kasa

Nowadays electric vehicle has increasingly gained much popularity indicated by growing global share market targeted at 30% by 2030 after recording 7.2million global stock in 2019. Compared to Internal Combustion Engine (ICE) counterpart, Battery Electric Vehicles (BEV) produce zero tailpipe emission which greatly reducing carbon footprints. Induction motor has been widely used and its control technology has evolved from scalar type volt/hertz to recent predictive control technology. This allows induction motor's application to expand from being the workhorse of industry to become prime mover in electric vehicle, where high performance is expected. Among vector control scheme, Direct Torque Control (DTC) has gained interest over Field Oriented Control (FOC) with simpler structure, better robustness and dynamics performance yet suffer from high torque and flux ripple. In electric vehicle applications, high ripple at low speed is highly undesirable, potentially causing torsional vibration. High performance control requires speed sensor integration, which often increase complexity in the design. The work aims to review the best control technology for induction motor in electric vehicle application through performance parameter evaluation such as improvement on dynamic response, torque and flux ripple reduction, and component optimization. Several arise issues in motor control and possible methods to circumvent are highlighted in this work. In conclusion, model predictive torque control (MPTC) is the most promising scheme for electric vehicle with excellent dynamic response, good low speed performance, and 50% torque ripple reduction compared to conventional DTC and potential integration with sliding mode observer for sensorless solution.

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