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<![CDATA[Development of Web-based Surveillance System for Internet Of Things (IoT) Application ]]>
<![CDATA[Noorjannah Ibrahim, Siti]]>;
<![CDATA[H. Hasan Basri, A.]]>;
<![CDATA[Liza Asnawi, Ani]]>
<![CDATA[ Bulletin of Electrical Engineering and Informatics Vol 8, No 3: September 2019 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/eei.v8i3.1520
<![CDATA[With the advancement of wireless technology, our dependency on smart system has increases to a higher level than before. Without doubt, integration between different technologies becomes inevitable in order create affordable surveillance system. This paper presents the development of with web-based surveillance system with a dedicated Android-based mobile application using a Raspberry Pi and its supporting components i.e., Pi-Camera, PIR motion sensor, Ultrasonic sensor, web-based & mobile application. The designed system also utilizes Node-Red development tools as the platform to integrate all components of the system, MQTT as the communication protocol for data acquisition and ThingSpeak as the middleware. The proposed system can be implemented over the internet using any computer and mobile devices, at anywhere and anytime. The system can automatically stream live video viewed from the Android mobile application and the Raspberry Pi device can send an alert notification to users via email and SMS. The system can be one possible features in smart home system and is considered as an affordable solution, customizable and easy to implement in comparison with other commercial surveillance system products such as CCTV or IP Camera]]>
<![CDATA[Design and Parametric Evaluation of UWB Antenna for Array Arrangement ]]>
<![CDATA[Ahmed Shaikh, Faraz]]>;
<![CDATA[Khan, Sheroz]]>;
<![CDATA[Zahirul Alam, AHM]]>;
<![CDATA[Baillargeat, Dominique]]>;
<![CDATA[Hadi Habaebi, Mohamed]]>;
<![CDATA[Bin Yaacob, Mashkuri]]>;
<![CDATA[Shah, Jawad]]>;
<![CDATA[Shahid, Zeeshan]]>
<![CDATA[ Bulletin of Electrical Engineering and Informatics Vol 8, No 3: September 2019 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/eei.v8i3.1522
<![CDATA[This paper has introduced the concept of UWB antenna in array arrangements.The four elements of Balance Antipodal Vivaldi Antenna (BAVA) has been used for planar and h-plane array configuration in this research. Each single element of BAVA Antenna is printed on the glass-reinforced epoxy laminate material (FR4) along an overall thickness of 1.57mm and εr = 4.3 respectively. The optimized measurement of each particular element is 60.75mm x 66mm approximatel.Further the parametric evaluation of four BAVA elements in different planes has been observed in this paper. The placement of array elements has almost coverd entire UWB frequency range and appropriate reflection coefficient which is better than -10dB has been established in both combinations.According to simulation results, the array elements in planar arrangement presenting a suitable reflection and works well at 3.2GHz frequency while the arrangement in h-plane the array elements works well at 7GHz of frequency. In planar arrangement, the operating frequency of antenna elements is shifting as results of the distance among inter elements which increase in wavelength. In h-plane arrangement an antenna elements generate additional gain up to 10.2 dB with good radiation patterns as compared to the planar plane. The CSTMWS simulation software has been used for antenna structural design and parametric verification.]]>
<![CDATA[Frequency Dependency Analysis for Differential Capacitive Sensor ]]>
<![CDATA[Arfah Che Mustapha, Nurul]]>;
<![CDATA[H.M. Zahirul Alam, A.]]>;
<![CDATA[Khan, Sheroz]]>;
<![CDATA[Wong Azman, Amelia]]>
<![CDATA[ Bulletin of Electrical Engineering and Informatics Vol 8, No 3: September 2019 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/eei.v8i3.1524
<![CDATA[A differential capacitive sensing technique is discussed in this paper. The differential capacitive sensing circuit is making use of a single power supply. The design focus for this paper is on the excitation frequency dependency analysis to the circuit. Theory of the differential capacitive sensor under test is discussed and derivation is elaborated. Simulation results are shown and discussed. Next, results improvement has also been shown in this paper for comparison. Test was carried out using frequency from 40 kHz up to 400 kHz. Results have shown output voltage of Vout = 0.07927 Cx + 1.25205 and good linearity of R-squared value 0.99957 at 200 kHz. Potential application for this capacitive sensor is to be used for energy harvesting for its potential power supply. ]]>
<![CDATA[Parasitic Consideration for Differential Capacitive Sensor ]]>
<![CDATA[Arfah Che Mustapha, Nurul]]>;
<![CDATA[H.M. Zahirul Alam, A.]]>;
<![CDATA[Khan, Sheroz]]>;
<![CDATA[Wong Azman, Amelia]]>
<![CDATA[ Bulletin of Electrical Engineering and Informatics Vol 8, No 3: September 2019 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/eei.v8i3.1526
<![CDATA[Parasitic integration for a single supply differential capacitive sensing technique is presented in this paper. In real capacitive sensor measurement, parasitic impedance in its measurement. This paper objective is to study the effect of capacitive and resistive parasitic to the capacitive sensor circuit. The differential capacitive sensor circuit derivation theory is elaborated first. Then, comparison is made using simulation. Test was carried out using frequency from 40 kHz up to 400 kHz. Result is presented and have shown good linearity of 0.99984 at 300 kHz, R-squared value. This capacitive sensor is expected to be used for energy harvesting application.]]>
<![CDATA[Analysis of Airborne Dust Effects on Terrestrial Microwave Propagation in Arid Area ]]>
<![CDATA[A.A Elsheikh, Elfaih]]>;
<![CDATA[Md. Rafiqul, Islam]]>;
<![CDATA[Hadi Habaebi, Mohamad]]>;
<![CDATA[F. Ismail, Ahmad]]>;
<![CDATA[E. O. Elshaikh, Z.]]>;
<![CDATA[M. Suliman, F.]]>;
<![CDATA[Chebil, Jalel]]>
<![CDATA[ Bulletin of Electrical Engineering and Informatics Vol 8, No 3: September 2019 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/eei.v8i3.1528
<![CDATA[Sand and dust storms are environmental phenomena ,during these storms optical visibility might be decreased, consequently, atmospheric attenuation is clearly noticed. Micro-wave (MW) and Milimeter-wave (mm) propagation is severely affected by dust and sand storms in considerable areas around the world. Suspended dust particles may directly cause attenuation and cross polarization to the Electromagnetic waves propagating through the storm. In this paper, a thorough investigation of dust storm characteristics based on measured optical visibility and relative humidity is presented. In addition,the dust storms effects of on Micro-wave and Millimeter-wave propagation have been studied based on data measured Received Signal levels (RSL)and dust storm characteristics synchronously. Analytical dust attenuation models predictions are matched to the measured attenuation data at 14 GHz and 21 GHz. It has been found that the measured attenuation is approximately ten times higher than the predicted attenuation for both frequencies.]]>
<![CDATA[Designing Large-Scale Antenna Array Using Sub-Array ]]>
<![CDATA[Mukit, Naimul]]>;
<![CDATA[Md. Rafiqul, Islam]]>;
<![CDATA[Zahirul Alam, AHM]]>;
<![CDATA[Abdullah, Khaizuran]]>;
<![CDATA[Farihah Abdul Malek, Norun]]>;
<![CDATA[Nibir, Rauful]]>;
<![CDATA[Hidayah M Adnan, Noor]]>;
<![CDATA[Osman, Eid]]>
<![CDATA[ Bulletin of Electrical Engineering and Informatics Vol 8, No 3: September 2019 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/eei.v8i3.1529
<![CDATA[Antenna array of large scale have been examined for different applications including 5G technology. To get better data rate or a reliable link substantial number of antenna arrays have been utilized to provide high multiplexing gains as well as array gains with high directivity. In this paper a simple but efficient implementation technique of using sub-arrays for the improvement of large-sized uniform arrays. By repeating a small sub-array multiple times large arrays can be designed. This implication of utilizing small array simplifies the design of a larger array which allows the designer to concentrate on the smaller sub-array before assembling larger arrays. So, by investigating the sub arrays the performance and radiation characteristics of large arrays can be anticipated. The array-factor for a planar sub-array of 2x2 (4 elements) is analyzed using Mat-lab software and then a large array is formed by placing the 2x2 sub-array in different configurations in a rectangular arrangements up to 8x8 planar array. And then the results are validated with CST (Computer simulation technology) simulation results. In this way the array-factors, directivities, HPBWs, and side lobes of the constructed large arrays are analyzed and associated with the small sub-array.]]>
<![CDATA[Comparative study on the accelerated thermal aging behavior between palm and rapeseed natural ester oils ]]>
<![CDATA[N. L. M. Ridzuan]]>;
<![CDATA[N. A. Bakar]]>;
<![CDATA[S. A. Ghani]]>;
<![CDATA[I. S. Chairul]]>;
<![CDATA[N. H. A. Aziz]]>
<![CDATA[ Bulletin of Electrical Engineering and Informatics Vol 8, No 3: September 2019 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/eei.v8i3.1590
<![CDATA[The suitability of natural ester oils as an insulating medium in power transformers is discussed in this paper. Owing to environmental concerns, natural ester oils have great potential as mineral oil substitutes in power transformers. In this paper, the aging behaviors of palm and rapeseed natural ester oils were compared with that for mineral oil. The performance of these natural ester oils was assessed based on their properties (moisture content, acidity, and relative content of dissolved decay products) after accelerated thermal aging. The results showed that the palm oil has better performance compared to the rapeseed oil after accelerated thermal aging for 1500 h because of its lower acidity. This was further supported by the presence of sludge in the rapeseed oil after 1500 h of aging.]]>
<![CDATA[Non-radiative wireless energy transfer with single layer dual-band printed spiral resonator ]]>
<![CDATA[Lai Ly Pon]]>;
<![CDATA[Sharul Kamal Abdul Rahim]]>;
<![CDATA[Chee Yen Leow]]>;
<![CDATA[Tien Han Chua]]>
<![CDATA[ Bulletin of Electrical Engineering and Informatics Vol 8, No 3: September 2019 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/eei.v8i3.1593
<![CDATA[Accomplishing equilibrium in terms of transfer efficiency for dual-band wireless energy transfer (WET) system remains as one of key concerns particularly in the implementation of a single transmitter device which supports simultaneous energy and data transfer functionality. Three stages of design method are discussed in addressing the aforementioned concern. A single layer dual-band printed spiral resonator for non-radiative wireless energy transfer operating at 6.78 MHz and 13.56 MHz is presented. By employing multi-coil approach, measured power transfer efficiency for a symmetrical link separated at axial distance of 30 mm are 72.34% and 74.02% at the respective frequency bands. When operating distance is varied between 30 mm to 38 mm, consistency of simulated peak transfer efficiency above 50% is achievable.]]>
<![CDATA[Top oil heat distribution pattern of ONAN corn oil based transformer with presence of hot spot study using FEMM ]]>
<![CDATA[M. A. Husin]]>;
<![CDATA[Nordiana Azlin binti Othman]]>;
<![CDATA[N. A. Muhammad]]>;
<![CDATA[H. Kamarden]]>;
<![CDATA[M. S. Kamarudin]]>
<![CDATA[ Bulletin of Electrical Engineering and Informatics Vol 8, No 3: September 2019 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/eei.v8i3.1602
<![CDATA[Transformer thermal modelling is a crucial aspect to be considered as this may help the determination of heat capacity of transformer. This paper present, simulation study on Oil Natural Air Natural (ONAN) transformer heat distribution pattern with and without presence of hot spot temperature (HST). This paper aims to compare the effects of different HST value at different locations inside the transformer unit as well as to evaluate the top oil thermal behaviour of corn oil as cooling mechanism in a transformer. To achieve aforementioned objectives, three HSTs were introduced to the 30 MVA transformer winding to find the total heat build-up in the top of the transformer tank. The outcome of thermal properties is examined using x-y temperature plot. From the results found that the location of HST affects overall transformer’s temperature. HST at the top of the winding give a significant effect compared to when HST is at the bottom of the winding. It is also evident that the usage of corn oil reduced the temperature distribution of the transformer. The findings suggest that the temperature distribution study especially on transformer is important to monitor in-service transformer in a non-invasive manner.]]>
<![CDATA[A Review on SVC control for power system stability with and without auxiliary controller ]]>
<![CDATA[Zalina Kamis]]>;
<![CDATA[Mohd Ruddin Ab.Ghani]]>;
<![CDATA[Muhammad Nizam Kamarudin]]>;
<![CDATA[Hairol Nizam Mohd Shah]]>;
<![CDATA[Jano Zanariah]]>
<![CDATA[ Bulletin of Electrical Engineering and Informatics Vol 8, No 3: September 2019 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/eei.v8i3.1318
<![CDATA[Since the beginning of the last century, power system stability has been recognized as a vital problem in securing system operation. Power system instability has caused many major blackouts. This paper reviewed the previous technical works consisting of various methods of optimization in controlling power system stability. The techniques presented were compared to optimize the control variables for optimization of power system stability. Power system stability enhancement has been investigated widely in literature using different ways. This paper is focusing on SVC performance for enhancing power system stability either through SVC controlled itself or SVC controlled externally by other controllers. Static VAR compensators (SVCs) are used primarily in power system for voltage control as either an end in itself or a means of achieving other objectives, such as system stabilization.The analysis on performance of the previous work such as advantages and findings of a robust method approach in each technique was included in this paper.]]>
