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28,188 Article Results

Robust Visual Tracking with Improved Subspace Representation Model

10.12928/telkomnika.v15i1.4629
Jing; Jiangnan University Cheng , Sucheng; Yancheng Teachers University Kang
This paper is under in-depth investigation due to suspicion of possible plagiarism on a high similarity indexIn this paper, we propose a robust visual tracking with an improved subspace representation model. Different from traditional subspace representation model, we use sparse representation, but not the collaborative representation to reconstruct the observation samples, which can avoid the redundant object features in subspace effectively. Moreover, to reject the outliers in the process of tracking, we also propose the combination of sparse box templates and Laplacian residual. To solve the minimization problem of object representation efficiently, a fast numerical algorithm that accelerated proximal gradient (APG) approach is proposed for the Lagrangian function. Finally, experimental results on several challenging video sequences show better performance than LSST and many state-of-the-art trackers.
Volume: 15
Issue: 1
Page: 328-335
Publish at: 2017-03-01

Mutual Coupling Reduction in Antenna Using EBG on Double Substrate

10.12928/telkomnika.v15i2.6123
Raimi; Universiti Teknologi Malaysia Dewan , M.; Universiti Teknologi Malaysia K.A. Rahim , M.; Universiti Teknologi Malaysia R. Hamid , M.; Universiti Teknologi Malaysia E. Jalil , H.; Universiti Tun Hussein Onn Malaysia A. Majid
In this paper, a mutual coupling studies is conducted between two-element array antenna on dual substrate. A single patch antenna is firstly designed on dual substrate layer to testify appropriate performance at 2.45 GHz. Subsequently, an array of two element patches on dual substrate are constructed with one of them is incorporated with three EBG unit cell on the bottom substrate. The radiating patch is on the top substrate, while the EBG unit cells is on the bottom substrate. With EBGs in separate layers from the antenna array, the antenna elements are closely separated by a distance of 22 mm with a significant reduced mutual coupling of -26.61 dB. This correspond to a distance reduction of 34.68%. The proposed structure implemented only three EBG unit cells. Apart from that, the study of overlapped case of EBG with the antenna is also presented.
Volume: 15
Issue: 2
Page: 799-804
Publish at: 2017-03-01

A Robot Collision Avoidance Method Using Kinect and Global Vision

10.12928/telkomnika.v15i1.3566
Haibin; Fuzhou University Wu , Jianfeng; Fuzhou University Huang , Xiaoning; Fuzhou University Yang , Jinhua; Fuzhou University Ye , Sumei; Fuzhou University He
This paper introduces a robot collision avoidance method using Kinect and global vision to improve the industrial robot’s security. Global vision is installed above the robot, and a combination of the background-difference method and the Otsu algorithm are used. Human skeleton detection is then introduced to detect the location information of the human body. The collided objects are classified into nonhuman and human obstacle which is further categorized into the human head and non-head areas such as the arm. The Kalman filter is used to predict the human gesture. The human joints danger index is used to evaluate the risk level of the human on the basis of human body joints and robot’s motion information. Finally, a motion control strategy is adopted in view of obstacle categories and the human joint danger index. Results show that the proposed method can effectively improve robot’s security in real time.
Volume: 15
Issue: 1
Page: 4-17
Publish at: 2017-03-01

The Application of Wavelet Neural Network in the Settlement Monitoring of Subway

10.12928/telkomnika.v15i1.4310
YI; Tianjin Chengjian University, Tianjin 300384,China Zhenghui , WANG; School of Geology and Geomatics, Tianjin Chengjian University, Tianjin 300384,China Shuaimin , XU; College of Surveying Science and Engineering, Shandong University of Science and Technology, Qingdao 266510,China Yujing , LIU; School of Geology and Geomatics, Tianjin Chengjian University, Tianjin 300384,China Bei
The settlement monitoring of subway runs through the entire construction stage of subway. It is very important to predict the accurate settlement value for construction safety of subway. In this paper, the wavelet transform is used to denoise the settlement data. The auxiliary wavelet neural network, embedded wavelet neural network and single BP neural network are applied to predict the settlement of Tianjin subway. Compared with single BP neural network and auxiliary wavelet neural network, the embedded wavelet neural network model has a higher accuracy and better prediction effect. The embedded wavelet neural network is more valuable than the BP neural network model so it can be used in the prediction of subway settlement
Volume: 15
Issue: 1
Page: 109-114
Publish at: 2017-03-01

Flexible Dual Band Dipole Antenna with Electromagnetic Band Gap

10.11591/ijeecs.v5.i3.pp593-598
Maisarah Abu , Siti Adlina Md Ali , Najmiah Radiah Mohamad , Maizatun Muhamad
Flexible dual band dipole antenna incorporates with Electromagnetic Band Gap (EBG) to improve the well-known low profile characteristics of dipole antenna. The antenna operates at 2.45 GHz and 5.8 GHz which is printed on Fast film with 0.13 mm thickness. While the EBG is designed at 5.8 GHz by using Arlon AD350 with 1.016 mm thickness. EBG works as a ground plane for the antenna and helps by improving the realized gainandradiation pattern. Besides, EBG also act as a filter as the resonant frequency of the antenna is close to the EBG band gap. The 2.45 GHz of is eliminated while the performances of antenna at 5.8 GHz is improved. Thus the realized gain is increased up to 6.86 dB and the back lobes is clearly reduced. The designs of dipole antenna with EBG application such as Wifi and others on-body communication devices.
Volume: 5
Issue: 3
Page: 593-598
Publish at: 2017-03-01

Potential Usage Estimation of Ground Water using Spatial Association Rule Mining

10.12928/telkomnika.v15i1.4750
Suci Sri Utami; Departement of Research and Development Technology, Regional Water Company Bogor City Sutjipto , Imas Sukaesih; Departement of Computer Science, Bogor Agricultural University, Bogor 16680, Indonesia. Sitanggang , Baba; Department of Soil Sciences and Land Resources, Bogor Agricultural University, Bogor 16680, Indonesia. Barus
The utilization of ground water in the long term will lead to a number of negative impacts on groundwater resources and the environment, such as the decrease of groundwater level, seawater intrusion, land subsidence as well as scarcity of ground water. Furthermore, the use of ground water has directly affected the consumption pattern of Regional Water Company Bogor City (PDAM) customers. This study aims to determine the patterns and characteristics of PDAM customers in the utilization of ground water by using spatial association rule mining, so it can help PDAM to approximate the increase of customers that utilize ABT and the losses incurred. This research shows that as many as 53.362 (41.27%) PDAM customers that have the potential to use groundwater. The said customers are featured by several characteristics, such as being active customers, with monthly water bill of less than Rp. 53.358 and are not close to river.
Volume: 15
Issue: 1
Page: 504-511
Publish at: 2017-03-01

Driver`s Steering Behaviour Identification and Modelling in Near Rear-End collision

10.12928/telkomnika.v15i2.6133
Nurhaffizah; Universiti Teknologi MARA Universiti Teknologi Malaysia Hassan , Hairi; Universiti Teknologi Malaysia Zamzuri , Nurbaiti; Universiti Teknologi MARA Universiti Teknologi Malaysia Wahid , Khairul; Universiti Teknologi Malaysia Akmal Zulkepli , Muhammad; Universiti Teknologi Malaysia Zulfaqar Azmi
This paper studies and identifies driver`s steering manoeuvre behaviour in near rear-end collision. Time-To-Collision (TTC) is utilized in defining driver’s emergency threat assessment. The target scenario is set up under real experimental environment and the naturalistic data from the experiment are collected. Four normal drivers are employed for the experiment to perform the manoeuvre. Artificial Neural Network (ANN) is proposed to model the behaviour of the driver`s steering manoeuvre. The results show that all drivers manage to perform steering manoeuvre within the safe TTC region and the modelling results from ANN are reasonably positive. With further studies and improvements, this model would benefit to evaluate the driving reliability to enhance traffic safety and Intelligent Transportation System.
Volume: 15
Issue: 2
Page: 861-868
Publish at: 2017-03-01

Research on Chaotic Firefly Algorithm and the Application in Optimal Reactive Power Dispatch

10.12928/telkomnika.v15i1.3862
Genfu; Institute of Mechanical and Electrical Technology, Jinggangshan University Xiao , Huan; Institute of Electronic and Information Engineering, Jinggangshan University Liu , Yuming; Institute of Mechanical and Electrical Technology, Jinggangshan University Guo , Yanhui; Institute of Mechanical and Electrical Technology, Jinggangshan University Zhou
Firefly algorithm (FA) is a newly proposed swarm intelligence optimization algorithm. The original version of FA usually traps into local optima like many other general swarm intelligence optimization algorithm. In order to overcome this drawback, the chaotic firefly algorithm(CFA) is proposed. The methods of chaos initialization, chaos population regeneration and linear decreasing inertia weight have been introduced into the original version of FA so as to increase its global search mobility for robust global optimization. The CFA is calculated in Matlab and is examined on six benchmark functions. In order to evaluate the engineering application of the algorithm, the reactive power optimization problem in IEEE 30 bus system is solved by CFA. The outcomes show that the CFA has better performance compared to the original version of FA and PSO
Volume: 15
Issue: 1
Page: 93-100
Publish at: 2017-03-01

Netscan and Networx for Management Bandwidth and Traffic with Simple Routing

10.12928/telkomnika.v15i1.4183
Mufadhol; STEKOM Semarang Mufadhol , Guruh; STEKOM Semarang Aryotejo , Agus; STEKOM Semarang Wibowo
Currently, approximately 3.4 billion people are accessing the internet around the world and that number is still growing. This phenomena creates the Internet culture that has a great influence on science, technology and even the world economy. Internet bandwidth is very expensive, which makes an information technology based company have to map the internet accurately either daily, monthly or yearly. That data will be taken into consideration by the company to decide how to provide services that make an internet surfing is a pleasant experience. If not regulated, most likely the traffic and bandwidth will be used up even when it is only shared by a few users. To anticipate this, we need a bandwidth and management traffic system using Netscan and Networx in order to monitoring the usage of Internet.
Volume: 15
Issue: 1
Page: 464-470
Publish at: 2017-03-01

Estimation of Turbidity in Water Treatment Plant using Hammerstein-Wiener and Neural Network Technique

10.11591/ijeecs.v5.i3.pp666-672
M. S Gaya , L. A. Yusuf , Mamunu Mustapha , Bashir Muhammad , Ashiru Sani , Aminu Tijjani Aminu Tijjani , N. A. Wahab , M. T.M. Khairi
Turbidity is a measure of water quality. Excessive turbidity poses a threat to health and causes pollution. Most of the available mathematical models of water treatment plants do not capture turbidity. A reliable model is essential for effective removal of turbidity in the water treatment plant. This paper presents a comparison of Hammerstein Wiener and neural network technique for estimating of turbidity in water treatment plant. The models were validated using an experimental data from Tamburawa water treatment plant in Kano, Nigeria. Simulation results demonstrated that the neural network model outperformed the Hammerstein-Wiener model in estimating the turbidity. The neural network model may serve as a valuable tool for predicting the turbidity in the plant.
Volume: 5
Issue: 3
Page: 666-672
Publish at: 2017-03-01

FPGA Based Pattern Generation and Synchonization for High Speed Structured Light 3D Camera

10.12928/telkomnika.v15i2.6146
Muhammad; Sungkyunkwan University Atif , Sukhan; Sungkyunkwan University Lee
Recently, structured light 3D imaging devices have gained a keen attention due to their potential applications to robotics, industrial manufacturing and medical imaging. Most of these applications require high 3D precision yet high speed in image capturing for hard and/or soft real time environments. This paper presents a method of high speed image capturing for structured light 3D imaging sensors with FPGA based structured light pattern generation and projector-camera synchronization. Suggested setup reduces the time for pattern projection and camera triggering to 16msec from 100msec that should be required by conventional methods.
Volume: 15
Issue: 2
Page: 926-933
Publish at: 2017-03-01

Hybrids Otsu method, Feature region and Mathematical Morphology for Calculating Volume Hemorrhage Brain on CT-Scan Image and 3D Reconstruction

10.12928/telkomnika.v15i1.3146
Sumijan; Gunadarma University Sumijan , Sarifuddin; Gunadarma University Madenda , Johan; Gunadarma University Harlan , Eri Prasetya; Gunadarma University Wibowo
Traumatic brain injury is a pathological process of brain tissue that is not degenerative or congenital, but rather due to external mechanical force, which causes physical disorders, cognitive function, and psychosocial. These disorders can be permanent or temporary and accompanied by the loss of or change in level of consciousness. Segmentation techniques for Computed Tomography Scanner (CT scan) of the brain is one of the methods used by the radiologist to detect abnormalities or brain hemorrhage that occurs in the brain.  This paper discusses the extraction area of a brain hemorrhage on each image slice CT scan and 3D reconstruction, making it possible to visualize the 3D shape and calculating the volume of a brain hemorrhage. Extraction of brain hemorrhage area is based on a combination of Otsu algorithm, the algorithm Morphological features and algorithms region. For the reconstruction of a 3D brain hemorrhage area of the bleeding area on a 2D slice is done by using a linear interpolation approach.
Volume: 15
Issue: 1
Page: 283-291
Publish at: 2017-03-01

Diurnal Variability Of Underwater Acoustic Noise Characteristics in Shallow Water

10.12928/telkomnika.v15i1.4510
Yasin; Universiti Teknologi Malaysia Yousif Al-Aboosi , Abdulrahman; Universiti Teknologi Malaysia Kanaa , Ahmad Zuri; Universiti Teknologi Malaysia Sha'ameri , Hussein; University of Mustansiriyah A. Abdualnabi
The biggest challenge in the underwater communication and target locating is to reduce the effect of underwater acoustic noise (UWAN). An experimental model is presented in this paper for the diurnal variability of UWAN of the acoustic underwater channel in tropical shallow water. Different segments of data are measured diurnally at various depths located in the Tanjung Balau, Johor, Malaysia. Most applications assume that the noise is white and Gaussian. However, the UWAN is not just thermal noise but a combination of turbulence, shipping and wind noises. Thus, it is appropriate to assume UWAN as colored rather than white noise. Site-specific noise, especially in shallow water often contains significant non-Gaussian components. The real-time noise segments are analyzed to determine the statistical properties such as power spectral density (PSD), autocorrelation function and probability density function (pdf). The results show the UWAN has a non-Gaussian pdf and is colored. Moreover, the difference in UWAN characteristics between day and night is studied and the noise power at night is found to be more than at the day time by around (3-8dB).
Volume: 15
Issue: 1
Page: 314-321
Publish at: 2017-03-01

Characterization of Electromagnetic Valveless Micropump

10.12928/telkomnika.v15i2.6115
M. Q. A; Universiti Teknologi Malaysia Ruslia , Pei; Universiti Tunku Abdul Rahman Song Chee , Pei; Universiti Teknologi Malaysia Ling Leow
This paper presents an electromagnetically-actuated micropump for microfluidic application. The system comprises two modules; an electromagnetic actuator module and a diffuser module. Fabrication of the diffuser module can be achieved using photolithography process with a master template and a PDMS prepolymer as the structural material. The actuator module consists of two power inductors and two NdFeB permanent magnets placed between the diffuser elements. The choice of this actuation principle merits from low operating voltage (1.5 Vdc) and the flow direction can be controlled by changing the orientation of the magnet vibration. Maximum volumetric flow rate of the fabricated device at zero backpressure is 0.9756 µLs-1 and 0.4659 µLs-1 at the hydrostatic backpressure of 10 mmH2O at 9 Hz of switching speed.
Volume: 15
Issue: 2
Page: 771-777
Publish at: 2017-03-01

Compact Structure and Low Losses for Wilkinson Power Divider at 9400MHz Frequency for X-Band Antenna System

10.12928/telkomnika.v15i1.3475
Arief Budi; Indonesian Institute of Sciences Santiko , Novita Dwi; Indonesian Institute of Sciences Susanti , Taufiqqurrachman; Indonesian Institute of Sciences Taufiqqurrachman
This paper is under in-depth investigation due to suspicion of possible plagiarism on a high similarity indexThis paper presents design and implementation 2-way Wilkinson power divider at 9400 MHz frequency which matched to 50Ω transmission line. This design applies Microstrip line with Roger Duroid 5880 Substrate and uses software simulation (ADS 2011) to help the design. This Wilkinson power divider designed at 9400MHz for use on Antenna X-Band Radar System. The desire objective is a power divider can be used in compact circuit board with low insertion loss and good matching for all ports. The dimension of the devices after fabrication is 30mm x 35mm. The voltage standing wave ratio (VSWR) for all port for both dividers is less than 1.33,  Forward transmission the devices as divider or the split power ratio (S21 and S31)is about -2.522dB, reverse transmission the devices as combiner (S12 and S13) is about -2.861dB. The isolation between the both output ports shows a good isolation, less than -11.271dB. The overall result of simulation and fabrication show a fairly good result.
Volume: 15
Issue: 1
Page: 143-149
Publish at: 2017-03-01
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