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29,758 Article Results

Objective assessment of surgeon’s psychomotor skill using virtual reality module

10.11591/ijeecs.v14.i3.pp1533-1543
Siti Nor Zawani Ahmmad , Eileen Su Lee Ming , Yeong Che Fai , Suneet Sood , Anil Gandhi , Nur Syarafina Mohamed , Hisyam Abdul Rahman , Etienne Burdet
This study aims to identify measurable parameters that could be used as objective assessment parameters to evaluate surgical dexterity using computer-based assessment module. A virtual reality module was developed to measure dynamic and static hand movements in a bimanual experimental setting. The experiment was conducted with sixteen subjects divided into two groups: surgeons (N = 5) and non-surgeons (N = 11). Results showed that surgeons outperformed the non-surgeons in motion path accuracy, motion path precision, economy of movement, motion smoothness, end-point accuracy and end-point precision. The six objective parameters can complement existing assessment methods to better quantify a trainee’s performance. These parameters also could provide information of hand movements that cannot be measured with the human eye. An assessment strategy using appropriate parameters could help trainees learn on computer-based systems, identify their mistakes and improve their skill towards the competency, without relying too much on bench models and cadavers.
Volume: 14
Issue: 3
Page: 1533-1543
Publish at: 2019-06-01

Current mode proportional resonant controlled multi input–SEPIC-re-boost-system

10.11591/ijpeds.v10.i2.pp682-689
B. Jagadish Kumar , Basavaraja Banakara
The intention of this paper is to identify a suitable controller for closed loop multi converter system for multiple input sources and to improve time response of high-gain-step up-converter. Closed-loop Multi Converter System (MCS) is utilized to regulate load-voltage.  This effort recommends suitable-controller for closed-two loop-controlled-SEPIC-REBOOST Converter fed DC motor. The estimation of the yield in open-two loop and closed- two-loop-circuit has been done using MATLAB or Simulink. Closed-two loop-control of Multi Converter System with Propotional+Integral (PI)- Propotional+Integral (PI) and Proportional+Resonant (PR) - Proportional+Resonant (PR) Controllers are investigated and their responses are evaluated in conditions of rise time, peak time, settling time and steady state error. It is seen that current-mode PR-PR controlled MCS gives better time domain response in terms of motor speed. A Prototype of MCS has been fabricated in the laboratory and the experimental-results are authenticated with the simulation-results.
Volume: 10
Issue: 2
Page: 682-689
Publish at: 2019-06-01

The multilevel inverter with clamped-diode

10.11591/ijeecs.v14.i3.pp1189-1195
Trong-Thang Nguyen
In this study, the author analyzes the advantages and disadvantages of multi-level inverter compared to the traditional two-level inverter and then chose the suitable inverter. Specifically, the author analyzes and designs the three-level inverter, including the power circuit design and control circuit design. All designs are verified through the numerical simulation on Matlab. The results show that even though the three-level inverter has a low number of switches (only 12 switches), but the quality is very good: the total harmonic distortion is small; the output voltage always follows the reference voltage.
Volume: 14
Issue: 3
Page: 1189-1195
Publish at: 2019-06-01

Performance analysis on color image mosaicing techniques on FPGA

10.11591/ijece.v9i3.pp1630-1636
Jayalaxmi H , S. Ramachandran
Today, the surveillance systems and other monitoring systems are considering the capturing of image sequences in a single frame. The captured images can be combined to get the mosaiced image or combined image sequence. But the captured image may have quality issues like brightness issue, alignment issue (correlation issue), resolution issue, manual image registration issue etc. The existing technique like cross correlation can offer better image mosaicing but faces brightness issue in mosaicing. Thus, this paper introduces two different methods for mosaicing i.e., (a) Sliding Window Module (SWM) based Color Image Mosaicing (CIM) and (b) Discrete Cosine Transform (DCT) based CIM on Field Programmable Gate Array (FPGA). The SWM based CIM adopted for corner detection of two images and perform the automatic image registration while DCT based CIM aligns both the local as well as global alignment of images by using phase correlation approach. Finally, these two methods performances are analyzed by comparing with parameters like PSNR, MSE, device utilization and execution time. From the analysis it is concluded that the DCT based CIM can offers significant results than SWM based CIM.
Volume: 9
Issue: 3
Page: 1630-1636
Publish at: 2019-06-01

Study of multiple-source data collection in wireless sensor networks

10.11591/ijeecs.v14.i3.pp1479-1483
Radhi Sehen Issa
A detailed survey on the process of data collection from multiple sources in Wireless Sensor Networks (WSNs) is introduced. The topologies that determine the location of the network components with respect to each other are presented. These topologies are often referred to as Mobility topologies. The performance of the overall WSN architecture significantly depends on these topologies. As a consequence, these topologies are elaborately compared and discussed. The most common network components that efficiently collaborate in data collection process are explained. To highlight the data collection process as a subject of our concern, the phases that describe the stages of the data collection are illustrated. These phases consist of three successive stages: discovery, data transfer, and routing. To sum up, the most recent approaches for developing the process of data collection in multiple-source WSNs are also presented.
Volume: 14
Issue: 3
Page: 1479-1483
Publish at: 2019-06-01

A review on optimal placement and sizing of custom power devices/FACTS devices in electrical power systems

10.11591/ijpeds.v10.i2.pp900-908
V. Tejaswini , D. Susitra
Power loss reduction, improvement of voltage profile, system reliability and system security are the important objectives that motivated researchers to use custom power devices/FACTS devices in power systems. The existing power quality problems such as power losses, voltage instability, voltage profile problem, load ability issues, energy losses, reliability problems etc. are caused due to continuous load growth and outage of components. The significant qualities of custom power devices /FACTS devices such as power loss reduction, improvement of voltage profile, system reliability and system security have motivated researchers in this area and to implement these devices in power system. The optimal placement and sizing of these devices are determined based on economical viability, required quality, reliability and availability. In published literatures, different algorithms are implemented for optimal placement of these devices based on different conditions. In this paper, the published literatures on this field are comprehensively reviewed and elaborate comparison of various algorithms is compared. The inference of this extensive comparative analysis is presented.  In this research, Meta heuristic methods and sensitive index methods are used for determining the optimal location and sizing of custom power devices/FACTS devices. The combination of these two methods are also implemented and presented.
Volume: 10
Issue: 2
Page: 900-908
Publish at: 2019-06-01

Classification of cow’s behaviors based on 3-DoF accelerations from cow’s movements

10.11591/ijece.v9i3.pp1656-1662
Phung Cong Phi Khanh , Kieu Thi Nguyen , Nguyen Dinh-Chinh , Tran Duc-Nghia , Hoang Quang Trung , Nguyen Van Thang , Tran Duc-Tan
Cow’s behavior classification helps people to monitor cow activities, thus the health and physiological periods of cows can be well tracked. To classify the behavior of cows, the data from the 3-axis acceleration sensor mounted on their neck is often used. Data acquisition and preprocessing of sensor data is required in this device. We acquire data from the 3-axis acceleration sensor mounted on the cows’neck and send to the microcontrollter. At the microcontroller, a proposed decision tree is applied in real-time manner to classify four important activities of the cows (standing, lying, feeding, and walking). Finally, the results can be sent to the server through the wireless transmission module. The test results confirm the reliability of the proposed device.
Volume: 9
Issue: 3
Page: 1656-1662
Publish at: 2019-06-01

Energy and power estimation for three different locations in Palestine

10.11591/ijeecs.v14.i3.pp1049-1056
Ahmed S A Badawi , Nurul Fadzlin Hasbullaha , Siti Hajar Yusoff , Aisha Hassan Hashim
In this paper power energy estimated based on wind speed records in three different areas in Palestine Nablus, Ramallah and Gaza. The main aims of this study to calculate the total amount of power and energy that can produce and to encourage investment in renewable energy in Palestine. Available meteorological data from local weather stations are used to study the wind energy potential in the West Bank (WB) for two sites and Gaza Strip (GS) for one site. The daily average wind speed data for three sites in Palestine analyzed, and fitted to the Weibull probability distribution function. The parameters of Weibull have been calculated by author using Graphical method. This study shed lights on the relationship between the wind energy and power versus the mean wind speed (MWS). The total gathered energy per unit area during 2006 in WB from Nablus site is 927.1 kwhr/m2, whereas 2008.0141 kwhr/m2 from Ramallah site.This significant study to assess the wind energy production in Palestine to encourage investment in renewable energy sectors.
Volume: 14
Issue: 3
Page: 1049-1056
Publish at: 2019-06-01

Development of automatic healthcare instruction system via movement gesture sensor for paralysis patient

10.11591/ijece.v9i3.pp1676-1682
S. A. C. Aziz , A. F. Kadmin , N. Rahim , W. H. W. Hassan , I. F. A. Aziz , M. S. Hamid , R. A. Hamzah
This paper presented an automatic healthcare system where the system able to help and facilitates the paralysis patient to complete their daily life. When a patient suffers from a paralysis attack, the whole or partial of their body maybe disabled to move which means their movement is restricted and they also barely to communicate with anyone because they are unable to speak like a normal person. It will be hard for medical staff to understand what they want to convey and in helping them to manage their daily needs such as eating, drinking, bathing and etc. By developing this project, the health officer can assist the paralyzed patient when they are alerted by the message from patient via GSM network. There are several instruction of movement gesture sensor presented in this paper in order to assist health officer in helping the paralyzed patient to complete their needs. Whenever the patient gives the simple hand movement instruction, then it will be delivered through SMS and the alerted notice will be display on notification board to alert the health officers for assisting the patient.
Volume: 9
Issue: 3
Page: 1676-1682
Publish at: 2019-06-01

Teacher and student interactions and characteristics from critical theorists school

10.11591/ijere.v8i2.17926
Akbar Salehi
In recent years, critical thinkers have done serious discussions in education and other fields in our lives like social, cultural, political and economical. This paper is going to consider some of the critical thinkers’ theories in order to clarify teacher and student interactions in education. The research is a type of fundamental and qualitative study which frames teacher and student interactions by means of a descriptive – analytical method. Accordingly, we introduce critical teacher as a teacher who includes specific characteristics like emancipation, critical nature and openness. Therefore mentioned teacher attends the role of culture in human life and he resists reproduced by the regime. He is someone who provides the way for public hearing; in addition, he teaches his students how to resist domination. On the other side, a student in this school will not be dominated by the regime by means of its essential tools as probe and questioning. A student has been taught to hear everyone regardless of race, religion and social class. Finally, this paper proposes applying these ideas for educational systems informal and operational ways.
Volume: 8
Issue: 2
Page: 313-317
Publish at: 2019-06-01

A design of license plate recognition system using convolutional neural network

10.11591/ijece.v9i3.pp2196-2204
P. Marzuki , A. R. Syafeeza , Y. C. Wong , N. A. Hamid , A. Nur Alisa , M. M. Ibrahim
This paper proposes an improved Convolutional Neural Network (CNN) algorithm approach for license plate recognition system. The main contribution of this work is on the methodology to determine the best model for four-layered CNN architecture that has been used as the recognition method. This is achieved by validating the best parameters of the enhanced Stochastic Diagonal Levenberg Marquardt (SDLM) learning algorithm and network size of CNN. Several preprocessing algorithms such as Sobel operator edge detection, morphological operation and connected component analysis have been used to localize the license plate, isolate and segment the characters respectively before feeding the input to CNN. It is found that the proposed model is superior when subjected to multi-scaling and variations of input patterns. As a result, the license plate preprocessing stage achieved 74.7% accuracy and CNN recognition stage achieved 94.6% accuracy.
Volume: 9
Issue: 3
Page: 2196-2204
Publish at: 2019-06-01

The effect of short circuit fault on one winding to other windings in FRA

10.11591/ijpeds.v10.i2.pp585-593
N. F. M. Yasid , M. F. M. Yousof , R. Abd. Rahman , H. Zainuddin , S. A. Ghani
Monitoring and diagnosis of power transformer in power systems have been examined and debated significantly in last few decades. Recently, more researchers have expressed their interest in these issues as the utilities and network operators operating under a rising cost-effecting pressure. Especially, in studying to monitor winding faults which is found to be the most common fault within transformers. This paper addresses the issue of the effect of inter-windings short circuit fault in a Dyn11 connected transformer. The specific aim is to study the effect of fault at winding of other phases to the response of measured phase. Frequency Response Analysis (FRA) which is discovered to be a powerful and sensitive method to examine and evaluate the condition, including the mechanical reliability of the transformer windings is used.
Volume: 10
Issue: 2
Page: 585-593
Publish at: 2019-06-01

Performance enhancement in a multilevel inverter fed PTC induction motor drive by optimal voltage vector selection

10.11591/ijpeds.v10.i2.pp801-812
Himabindu T , A.V. Ravi Teja , G Bhuvaneswari , Bhim Singh
This paper proposes a novel predictive control strategy for a multilevel inverter fed Induction Motor Drive (IMD) with optimal voltage vector selection at every sampling interval. The proposed predictive control strategy, apart from enhancing the dynamic speed and torque responses of the drive, strives to reduce the number of switching transitions by choosing optimal voltage vector, thereby reducing the switching losses significantly. The algorithm put forth here chooses the most suitable switching state among the redundant switching combinations, such that minimum number of switches change their states from the previous switching combination to the present one. This results in perceptible reduction in the switching losses thereby increasing the efficiency of the converter. The proposed Predictive Torque Control (PTC) strategy is modeled and simulated in Matlab/ Simulink environment and the results are reported for a 2-level and 3-level inverter fed IMD configurations. The results demonstrate the effectiveness of the proposed PTC for both 2-level and 3-level inverter fed IMDs.
Volume: 10
Issue: 2
Page: 801-812
Publish at: 2019-06-01

Tunable function of feeding network and SPDT switch for WIMAX application

10.11591/ijeecs.v14.i3.pp1574-1580
N. Edward , N. A. Shairi , Z. Zakaria , Tole Sutikno , I. D. Saiful Bahri
A tunable circuit that functions as a power divider and a single pole double throw (SPDT) switch is proposed in this paper. The power divider design was based on the conventional Wilkinson power divider (WPD). Since WPD design has wideband properties, a modification was made in the design to make it narrowband so that it will only work for WiMAX applications. Two shorted stubs were introduced in the transmission line of the output ports to encounter the mismatch when the function was switched to an SPDT switch. Rogers RO4350 (er = 3.48, h = 0.508mm) was used as a substrate material and copper (thickness = 0.035 mm) related to patch of this proposed design. When the circuit functioned as a power divider, the simulated result showed S11 < -16 dB, S12 > 3.97 dB, and S23 < -14 dB for both operating frequencies of 2.5 GHz and 3.5 GHz. On the other hand, when the circuit functioned as an SPDT switch and port 2 was in the ON state, the simulated result showed S11 < -35 dB, S12 > -1.1, S13 < -16 dB, and S23 < 18 dB for both operating frequencies of 2.5 and 3.5 GHz. The proposed design showed a good performance as a power divider and an SPDT switch, thus, it can be used for multifunctional microwave circuits.
Volume: 14
Issue: 3
Page: 1574-1580
Publish at: 2019-06-01

A performance study of the suitability of Adaptive boosting in Red Acne detection

10.11591/ijeecs.v14.i3.pp1493-1498
Satyake Bakshi , Sathya A
AdaBoost along with HaarCascades have been well received for its accuracy and performance in primarily Facial Recognition applications. However, they are known to perform poorly with objects which have a different rotational orientation or for objects whose shapes are largely variant . In this paper, we apply Adaptive Cascading technique to a specific dermatological application of detecting red acne which are largely shaped variant outgrowths on the skin and to identify its suitability in the detection of acne. Based on the outcome it would be declared if Viola-Jones based Adaptive Boosting is well suited for dermatological processing of skin diseases.
Volume: 14
Issue: 3
Page: 1493-1498
Publish at: 2019-06-01
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