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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 9,226 Documents
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A Nonlinear Numerical Simulation Method of Bionic-Robot-Fish Quick Start Chao Yang
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 3: March 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

Fishtail skeleton, muscles and nerves controlling body swinging were simulated using alloy sheet, giant magnetostrictive material (GMM) posted on this sheet and outside magnetic field in this study. Thus, the quick start of part natural fishes was simulated. The non-linear model related to large geometric deformation and non-linear damping was established after analysis and research. A recurrence formula is obtained using eigensolution, nonlinear dynamic equation and small parameter expansion method, and a numerical method for solving nonlinear problem is formed. The numerical analysis reveals the swimming mechanism of bionic robot fish, and the best start mode of this fish was designed. It also reveals the effect of material, geometric parameters, environmental factors, etc. on the starting of robot fish. The results show that there is an optimum frequency in the starting process of bionic robot fish. The optimum mode is a rapid transition from low order mode to high order mode, thus achieving the quick start of robot fish. These provide a theoretical basis and data support for designing the quick start of bionic robot fish. DOI : http://dx.doi.org/10.11591/telkomnika.v12i3.4430 
Version Management Based on the Association of Generalized Domains Li Qingfeng; Guan Bo; Bailin Yang
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 7: November 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

Multiple versions will be produced in the process of complex products developing. There are mass data of product components in different types and formats and relationships between components. Traditional researches of version management model concentrate on the information of single object rather than that of multi-objects and relationships between them, so it is difficult to manage the versions of complex product. A version management model based on the association of generalized domains was presented according to the polychromatic graph theory in the paper, and dynamic variations, features and rules of the association in version evolution were studied, and a version management system for controller software was developed. Examples show that the association model of generalized version based on the poly-chromatic graph realizes the effective management of the complex product developing. DOI: http://dx.doi.org/10.11591/telkomnika.v10i7.1548
A Concealment Aware UEP scheme for H.264 using RS Codes Deevya Indoonundon; Tulsi Pawan Fowdur; Sunjiv Soyjaudah
Indonesian Journal of Electrical Engineering and Computer Science Vol 6, No 3: June 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v6.i3.pp671-681

Abstract

H.264/AVC is currently the most widely adopted video coding standard due to its high compression capability and flexibility. However, compressed videos are highly vulnerable to channel errors which may result in severe quality degradation of a video. This paper presents a concealment aware Unequal Error Protection (UEP) scheme for H.264 video compression using Reed Solomon (RS) codes. The proposed UEP technique assigns a code rate to each Macroblock (MB) based on the type of concealment and a Concealment Dependent Index (CDI). Two interleaving techniques, namely Frame Level Interleaving (FLI) and Group Level Interleaving (GLI) have also been employed. Finally, prioritised concealment is applied in cases where error correction is beyond the capability of the RS decoder. Simulation results have demonstrated that the proposed framework provides an average gain of 2.96 dB over a scheme that used Equal Error Protection (EEP).
Smart Walking Stick for the Visually Challenged Mohammed Ahsan; Rishav Drolia; Ananda Kumar S
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 3: December 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i3.pp1282-1288

Abstract

Internet of things mixed with Radio Frequency identification generation permit a whole new context for whole new devices that are capable of combining their bodily and virtual existences. Radio Frequency identification, placing an identification label into every object, allows a clever device to get information, both actual-time or digital-connected statistics, without any physical touch. Information retrieved from such an object, turns it right into a capacity smart object, clearly able to car pick out itself and, if protection problems are certainly handled, maximum in all likelihood capable to connect to the worldwide net. This way, one can get a ubiquitous framework to get admission to, display and manipulate any of these smart items over a web of linked things. RFID tags in scientific context enable a fast and specific identification of each clever entity, permitting a ubiquitous and brief get admission to personal fitness data over an internet of factors [1-2]. People have been struggling with sicknesses weird. Visually challenged human beings are blind people who are very common and difficult to cope with of their way. The principle aim of this project is to aid the visually challenged human beings with a better navigation device. This clever strolling stick is greater state-of-the-art device with many embedded features.
Electromagnetic-thermal Scale Model of Gas-Insulated Bus Bars Hongtao Li; Naiqiu Shu; Ling Li; Hui Peng; Zipin Li
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 7: July 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i7.pp4988-4995

Abstract

Knowledge of the heat dissipation ability of gas-insulated bus bars (GIB) is paramount in the design stage. To reduce the capital cost, a scale model which has the identical electromagnetic-thermal characteristics of a full scale GIB is designed in this paper. The scaling relationships of the power losses, convection heat transfer, radiant heat transfer and thermal equilibrium are analyzed based on the governing equations and non-dimensional correlations. Current densities, power losses, convective heat transfer coefficients and temperature distributions in conductor and tank of the prototype and the scale models under different load currents are compared by FEM (Finite Element Method). The effectiveness of scale models is validated by the comparison between calculated and test results.
Comparative Research on Total Transfer Capability Calculation using Load Model Guoping Shi; Jun Liang; Peng Gu
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 4: April 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper proposes a method calculating total transfer capability(TTC) and critical voltage using static power model based on real-time recording data, traditional power system dispatching calculation doesn’t consider load model, which does not agree with the real, this paper compares TTC and critical voltage under different load model and P-V curves, on which load model has a strong influence, so load modeling is necessary based on real-time data and is significant for improving system stability. The simulations show necessity and suitability of the method. DOI: http://dx.doi.org/10.11591/telkomnika.v11i4.2330
Chaotic immune symbiotic organisms search for SVC installation in voltage security control Mohamad Khairuzzaman Mohamad Zamani; Ismail Musirin; Saiful Izwan Suliman; Muhammad Murtadha Othman
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.pp623-630

Abstract

Parallel with the urbanization of the world, energy demand in the world also increased. The increase in energy demand will require a power system to be operated near its stability limit. To mitigate the problem, Flexible Alternating Current Transmission System (FACTS) devices can be installed as a compensation scheme to improve voltage security in a power system. For an effective compensation, FACTS devices should be optimally allocated in a power system. Although optimization techniques can be implemented to optimally allocate these devices, problems have been reported which would affect the performance of the optimization techniques in terms of producing high quality solutions. This paper presents the implementation of Chaotic Immune Symbiotic Organisms Search for solving optimal Static VAr Compensator (SVC) allocation problem for voltage security control. The optimization is validated in IEEE 26-Bus Reliability Test System (RTS) realizes the capability of CISOS in solving the optimization problem. Comparative studies with respect to Particle Swarm Optimization (PSO) and Evolutionary Programming (EP) resulting in good agreement on the results and demonstrated superior performance of CISOS. Results of the study can be beneficial to power system community in terms of compensation planning prior to real world implementation.
Evaluation of mobile microwave radiation severity at al-door residential complex in Iraq Younes S. Alwan; Mohammad Sami Zidan; Mohammed Qasim Taha
Indonesian Journal of Electrical Engineering and Computer Science Vol 14, No 3: June 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v14.i3.pp1281-1285

Abstract

In this paper, the electromagnetic radiation of the mobile microwave signals, propagated by the mobile towers in Al-Door Residential Complex west of Iraq, is measured and evaluated. This complex contains main nodes and hub repeaters and feeders to transmit the service to the whole Salahuddin and the northern provinces. Therefore, this paper focused on this area to assess the radiation and to assess the radiation whether it is safe for humans or exceeded the dangerous level. The area has been divided on to 19 locations where there are mobile towers and the radiation is measured in these locations. The electric field intensity is unsafe and should be improved since it exceeds the level of 1.7 V/m. However, the magnetic field intensity is acceptable according to the measurements. In general, the electromagnetic radiation density is unsafe since many readings override the level of 1.3 μW/〖cm〗^2. The standards of the radiation severity are based on the recommendations of LATNEX Corp.
Low-Cost Vibration Chamber for Landslide Sensory and Alarm System Eliza Sabira Binti Ismail; Mohamed Hadi Habaebi; Muhammad Ibrahimy; Md Rafiqul Islam
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 1: April 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v10.i1.pp110-119

Abstract

Many previous research works published in the open literature aimed at designing a system that could detect landslide in early stage before the landslide becomes catastrophic. This paper presents a work-in-progress landslide early warning system for Malaysian environment. The aim of this paper is to develop the most effecienctly reliable cost-effective system in which slight earth movements are monitored continuously. The challenge this work aims at is to work with a low budget system that produce efficient performance. Hence, the material used is of-the-shelf. Early design optimization result of the vibration sensor used is quite promising detecting the slightest faint tremors, which are amplified using the best vibration chamber available. It is shown that the choice of proper pipe length and diameter dimensions in combination to a gravel to exaggerate the produced higher sensitivity level of 5dB. Furthermore, both systematic and random vibration tests  produced similar results.
Cyberbullying identification in twitter using support vector machine and information gain based feature selection Ni Made Gita Dwi Purnamasari; M. Ali Fauzi; Indriati Indriati; Liana Shinta Dewi
Indonesian Journal of Electrical Engineering and Computer Science Vol 18, No 3: June 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v18.i3.pp1494-1500

Abstract

Cyberbullying is one of the actions that violate the ITE Law where the crime is committed on social media applications such as Twitter. This action is difficult to detect if no one is reporting the tweet. Cyberbullying tweet identification aims to classify tweets that contain bullying. Classification is done using Support Vector Machine method where this method aims to find the dividing hyperplane between negative and positive class. This study is a text classification where more data is used, the more features are produced, therefore this research also uses Information Gain as feature selection to select features that are not relevant to the classification. The process of the system starts from text preprocessing with tokenizing, filtering, stemming and term weighting. Then perform the information gain feature selection by calculating the entropy value of each term. After that perform the classification process based on the terms that have been selected, and the output of the system is identification whether the tweet is bullying or not. The result of using SVM method is accuracy 75%, precision 70.27%, recall 86.66% and f-measure 77.61% on experiment maximum iteration = 20, λ = 0.5, γ = 0.001, ε = 0.000001, and C = 1. The best threshold of information gain is 90%, with accuracy 76.66%, precision 72.22%, recall 86.66% and f-measure 78.78%.

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