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INDONESIA
Indonesian Journal of Electrical Engineering and Computer Science
Published by Institute of Advanced Engineering and Science
ISSN : 25024752     EISSN : 25024760     DOI : -
Core Subject :
Arjuna Subject : -
Articles 9,174 Documents
 55   56   57   58   59 
Enhance manet usability for encrypted data retrieval from cloud computing Fairouz Sher Ali; Hadeel Noori Saad; Falah Hassan Sarhan; Bushra Naaeem
Indonesian Journal of Electrical Engineering and Computer Science Vol 18, No 1: April 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v18.i1.pp64-74

Abstract

Cloud computing has become a revolutionary computing model which provides an economical and flexible strategy for resource sharing and data management. Due to privacy concerns, sensitive data has to be encrypted before being uploaded to the cloud servers. Over the last few years, several keyword searchable encryption works have been described in the literature. However, existing works mostly focus on secure searching using keyword and only retrieve Boolean results that are not yet adequate. On the other hand, poor-resources of mobile networks play an important role on all applications area nowadays. Mobile nodes mostly act as information retrieval end which make it important to address this problem. In this paper, we present a secure keyword search scheme based on the Bloom filter(SKS-BF), which enhances the system’s usability by allowing ranking based on the relevance score of the search results and retrieves the top most relevant files instead of retrieving all the files. Further, the Bloom filter (BFs) can accelerate a search process involving a large number of keywords. Extensive experiments and network simulation confirm the efficiency of our proposed schemes.
Iterative Learning Impedance Control based on Physical Recovery Condition Elevation of Impaired Limb Jinbao He; Xia Zhuge; Zaifei Luo; Guojun Li; Zhang Yinchun
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 2: February 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

Rehabilitation robots have been designed to improve the daily life activity ability of patients with impaired limb. In this paper, we proposed a new iterative learning impedance control(ITLC) algorithm, which based on the physical recovery condition of impaired limb. Firstly, we evaluated the physical recovery condition elevation of impaired limb with periodic force parameter and trajectory tracking ratio(TTR) parameter, and modified the desired impedance on line using fuzzy method according to the change of physical recovery condition. Secondly, we designed an adaptive impedance controller that can be modified using iterative learning method. The convergence was analyzed based upon the Lyapunovlike positive definite sequence, which was monotonically decreasing under the proposed control schemes. DOI : http://dx.doi.org/10.11591/telkomnika.v12i2.3867
Ultra-Wideband Patch Antenna for K-Band Applications Umair Rafique; Syed Ahsan Ali
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 12: December 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

An ultra-wideband patch antenna is presented for K-band communication. The antenna is designed by employing stacked geometry and aperture-coupled technique. The rectangular patch shape and coaxial fed configuration is used for particular design. The ultra-wideband characteristics are achieved by applying a specific surface resistance of 75 ohm/square to the upper rectangular patch and it is excited through a rectangular slot made on the lower patch element (made of copper). The proposed patch antenna is able to operate in the frequency range of 12-27.3 GHz which is used in radar and satellite communication, commonly named as K-band. By employing a technique of thicker substrate and by applying a specific surface resistance to the upper patch element, an impedance bandwidth of 77.8\% is achieved having VSWR less than 2. It is noted that the gain of proposed antenna is linearly increased in the frequency range of 12-26 GHz and after that the gain is decreased up to 6 dBi. Simulation results are presented to demonstrate the performance of proposed ultra-wideband microstrip patch antenna.  http://dx.doi.org/10.11591/telkomnika.v12i12.6520 
A New Electrode Regulator System Identification of Arc Furnace Based on Time-Variant Nonlinear-Linear-Nonlinear Model Jinfeng Wang; Shoulin Yin; Xueying Wang
Indonesian Journal of Electrical Engineering and Computer Science Vol 2, No 1: April 2016
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v2.i1.pp32-39

Abstract

In this paper, we express arc furnace electrode regulator system as a time-variant nonlinear-linear-nonlinear model. On this basis, we propose an online identification method based on nonlinear-linear-nonlinear model system. This new scheme solves the problem of model variation and prediction precision decline causing by time-varying of arc characteristic. In order to dispose the difficulty of parameters separation in the online identification process, this new method adopts the mind of update the parameters of linear parts and nonlinear parts respectively. It realizes the parameters separation of system effectively. Simulation results show that this method can track the changes of arc characteristics effectively. That it achieves the aim of real-time monitoring and controlling system parameters.
Design and Realization of System Structure Based on Blackboard System R.Z. Chu; S.J. Sun; L. Yang
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 8: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper discusses design environment of software system structure of blackboard style, which ascertain out the job pattern the blackboard decision-making model. At last, let’s list regarding a mobile robotics architecture primary need and realize the characteristic to the blackboard system pattern in the quality demand to carry on the analysis, taking floor intelligence robot software system as example. Finally the quality and ability of the four patter in architecture classification has been compared. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3082 
Star Coordinate Dimension Arrangement using Euclidean Distance and Pearson Correlation Noor Elaiza Abdul Khalid; Izyan Izzati Kamsani
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 1: October 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i1.pp348-355

Abstract

Star Coordinate (SC) is a circular visualization technique that maps k-dimensional data. Its interactive features allow user to manipulate projections to search for hidden information. Without prior knowledge of relationship between dimensions users will be blindly searching for clusters. This paper proposes dimension rearrangement using Euclidean Distance and Pearson Correlations to reveal the clusters in SC. The methodology consists of four phases; Calculate the distance between individual attributes against a dependent attribute using Euclidean distance; Pearson correlation is used to obtain the correlation data attributes; Sort the correlation values in ascending order; finally, attributes table are reordered with the positive values to the right and negative values to the left according to the correlation value. The resulting tables are applied to produce the SC. This method is successful in producing clusters that makes it easier for the users to further manipulate the SC for their data analysis.
Characterization of Acrylonitrile Butadiene Styrene for 3D Printed Patch Antenna Norun Abdul Malek; Athirah Mohd Ramly; Atiah Sidek; Sarah Yasmin Mohamad
Indonesian Journal of Electrical Engineering and Computer Science Vol 6, No 1: April 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v6.i1.pp116-123

Abstract

3D printing is one of the additive manufacturing technology that has gain popularity for time saving and complex design. This technology increases a degree of flexibility for potential 3D RF applications such as wearable and conformal antennas. This paper demonstrates a circular patch antenna fabricated on 3D printed Acrylonitrile Butadiene Styrene (ABS) filament. The main reason of using a 3D printer is that it is accurate, easy to fabricate of a complex geometry and the ability to create new antennas that cannot be made using conventional fabrication techniques. The ABS material has a tangent loss of 0.0051 and the relative permittivity is 2.74. The thickness of the substrate is 1.25 mm. The simulation has been performed using Computer Simulation Technology (CST). The return loss from simulation software is in good match with measurement which is 12.5dB at 2.44GHz. Hence, from the results obtained, the ABS could be used as a substrate for an antenna.
An optimization of facial feature point detection program by using several types of convolutional neural network Shyota Shindo; Takaaki Goto; Tadaaki Kirishima; Kensei Tsuchida
Indonesian Journal of Electrical Engineering and Computer Science Vol 16, No 2: November 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v16.i2.pp827-834

Abstract

Detection of facial feature points is an important technique used for biometric authentication and facial expression estimation. A facial feature point is a local point indicating both ends of the eye, holes of the nose, and end points of the mouth in the face image. Many researches on face feature point detection have been done so far, but the accuracy of facial organ point detection is improving by the approach usingConvolutional Neural Network (CNN). However, CNN not only takes time to learn but also the neural network becomes a complicated model, so it is necessary to improve learning time and detection accuracy. In this research, the improvement of the detection accuracy of the learning speed is improved by increasing the convolution layer.
A Nondestructive Testing Research Based on Metal Bumper Bar System Inspired by Guided-wave Yang Hu; Wang Cheng
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 4: August 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

During the nondestructive testing for metal bumper bar system, it is a critical problem that it cannot identify the reflected wave. Based on the guided-wave inspiration and through studying lots of simulations, this paper systematically analyses the states of quality test for metal bumper bar system in the following four aspects respectively: area inspired by guided-wave, time inspired by guided-wave, head-wave width inspired by guided-wave and rate inspired by guided-wave. The paper also resolves completely the critical problem and completes the subject of quality test. DOI: http://dx.doi.org/10.11591/telkomnika.v10i4.866
A Multi-core Heterogeneous Programmable Automation Controller System of Construction Machine WANG Guoqing; YE Hong; Qu Jin; YANG Huaxin; LIU Chenghuan
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 12: December 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

There are two main issues, high cost and interrupt response delay for current PACs (programmable automation controllers) which are using high frequency single-chip microprocessors and commercial RTOS (real-time operating system) working by switching the tasks and interrupts. To solve these problems, a new low-cost multi-core heterogeneous PAC structure was proposed. Based on the traditional front-end of interrupt service without interrupt switching delay and the division & deployment of multi real-time tasks. We implemented a new programming language Engineer C including its syntax, compiler and an integrated development environment, which can dynamically divide the multi tasks and deploy the division to single low-cost microcontroller, then built the hardware prototype, which consists of a digital signal board, an analog signal board and a motion control board, every board has its microcontroller and communicates each other by an enhanced SPI bus. Testing results show the hardware prototype and IDE can be provided as a low-cost PAC solution for construction machine. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3802

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