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28,451 Article Results

Analysis and Design of Tag Antenna Based UHF RFID for Libraries

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4233
Xue Jian-bin , He Fengjie , Wang Dong
A kind of UHF RFID tag antenna for library management is designed. The series of design requirements are proposed through rich analytics. Refer to the management model of intelligent library based on UHF RFID. For the antenna, the size is , adopting T-shaped matching which good for adjusting of antenna impedance matching, the center frequency by simulations isunder application environment, Return Loss is less than in the frequency band of , the minimum value of return loss is . Simulation results show that the tag antenna has a good performance under application environment for library. DOI: http://dx.doi.org/10.11591/telkomnika.v13i3.7135 
Volume: 13
Issue: 3
Page: 521-528
Publish at: 2015-03-01

Mobile Robot Localization: A Review of Probabilistic Map-Based Techniques

10.11591/ijra.v4i1.pp73-81
Salvador Manuel Malagon-Soldara , Manuel Toledano-Ayala , Genaro Soto-Zarazua , Roberto Valentin Carrillo-Serrano , Edgar Alejandro Rivas-Araiza
This work presents a comprehensive review of current probabilistic developments used to calculate position by mobile robots in indoor environments. In this calculation, best known as localization, it is necessary to develop most of the tasks delegated to the mobile robot. It is then crucial that the methods used for position calculations be as precise as possible, and accurately represent the location of the robot within a given environment. The research community has devoted a considerable amount of time to provide solutions for the localization problem. Several methodologies have been proposed the most common of which are based in the Bayes rule. Other methodologies include the Kalman filter and the Monte Carlo localization filter wich will be addressed in next sections. The major contribution of this review rests in offering a wide array of techniques that researchers can choose. Therefore, method-sensor combinations and their main advantages are displayed.
Volume: 4
Issue: 1
Page: 73-81
Publish at: 2015-03-01

A Brief Survey Paper on Multi-Legged Robots

10.11591/ijra.v4i1.pp41-52
Mohammad Behmanesh , Ehsan Amiri Tehranizadeh , Mahmud Iwan Solihin
This paper presents a brief survey on multi-legged robots and their applications in agriculture such as for harvesting. Multi-legged robots have the benefit of more flexibility and adapt to different rough terrain in a better way. They also have very important applications in fulfilling the dangerous tasks such as mine detecting.
Volume: 4
Issue: 1
Page: 41-52
Publish at: 2015-03-01

A PSO-Optimized Reciprocal Velocity Obstacles Algorithm for Navigation of Multiple Mobile Robots

10.11591/ijra.v4i1.pp31-40
Ziyad Allawi , Turki Abdalla
In this paper, a new optimization method for the Reciprocal Velocity Obstacles (RVO) is proposed. It uses the well-known Particle Swarm Optimization (PSO) for navigation control of multiple mobile robots with kinematic constraints. The RVO is used for collision avoidance between the robots, while PSO is used to choose the best path for the robot maneuver to avoid colliding with other robots and to get to its goal faster. This method was applied on 24 mobile robots facing each other. Simulation results have shown that this method outperforms the ordinary RVO when the path is heuristically chosen.
Volume: 4
Issue: 1
Page: 31-40
Publish at: 2015-03-01

An Analysis of the Students’ Satisfaction Toward The Services of the Chemical Laboratory

10.11591/ijere.v4i1.4488
Astin Lukum , Yoseph Paramata
Chemistry Laboratory serves all of the students that was programmed chemistry lab works. The satisfaction of the students was studied that involving 50 students, the study was conducted to measure the students' satisfaction towards the services offered by the laboratory, Measurement of the students' satisfaction was conducted using statistical parametric t-test. The study shows that the students' satisfaction more than 75%. Chemistry Laboratory serves all of the students that was programmed chemistry lab works. The satisfaction of the students was studied that involving 50 students, the study was conducted to measure the students' satisfaction towards the services offered by the laboratory, Measurement of the students' satisfaction was conducted using statistical parametric t-test. The study shows that the students' satisfaction more than 75%.
Volume: 4
Issue: 1
Page: 22-29
Publish at: 2015-03-01

Online Biped Walking Pattern Generation with Contact Consistency

10.11591/ijra.v4i1.pp19-30
Wenqi Hou , Jian Wang , Jianwen Wang , Hongxu Ma
In this paper, a novel online biped walking gait pattern generating method with contact consistency is proposed. Generally, it’s desirable that there is no foot-ground slipping during biped walking. By treating the hip of the biped robot as a linear inverted pendulum (LIP), a foot placement controller that takes the contact consistency into account is proposed to tracking the desired orbit energy. By selecting the hip’s horizontal locomotion as the parameter, the trajectories in task space for walking are planned. A task space controller without calculating the inversion of inertial matrix is presented. Simulation experiments are implemented on a virtual 5-link point foot biped robot. The results show the effectiveness of the walking pattern generating method which can realize a stable periodic gait cycle without slipping and falling even suffering a sudden disturbance.
Volume: 4
Issue: 1
Page: 19-30
Publish at: 2015-03-01

Soft Switching Boost Converter Solution for Increase the Efficiency of Solar Energy Systems

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4224
Alireza Kaviani-Arani , Alireza Gheiratmand
Nowadays, renewable energies are considered as an important source of non-polluting and free energy. Solar energy in the form of photovoltaic systems is one of the most prominent of them. Using this type of energy can be an affordable and suitable solution to supply electricity to the consumers who do not have access to the distribution network due to geographical conditions. Regarding to low efficiency and high cost of installing solar panels, receiving the maximum power of them is taken into consideration. DC-DC converters are one of the key components of solar energy systems. These converters have the switching losses and their efficiency is not so high. This paper explores the switching losses in hard switching boost converter and by providing a soft switching boost converter, reduces switching losses and increases the efficiency of solar energy systems. The performance of the converter has been studied and simulations indicate its performance. DOI: http://dx.doi.org/10.11591/telkomnika.v13i3.7127 
Volume: 13
Issue: 3
Page: 449-457
Publish at: 2015-03-01

Saron Music Transcription Based on Rhythmic Information using HMM on Gamelan Orchestra

10.12928/telkomnika.v13i1.295
Yoyon K; Institut Teknologi Sepuluh Nopember Suprapto , Yosefine; Sekolah Tinggi Manajemen Informatika dan Teknik Komputer (STIKOM) Triwidyastuti
Nowadays, eastern music exploration is needed to raise his popularity that has been abandoned by the people, especially the younger generation. Onset detection in Gamelan music signals are needed to help beginners follow the beats and the notation. We propose a Hidden Markov Model (HMM) method for detecting the onset of each event in the saron sound. F-measure of average the onset detection was analyzed to generate notations. The experiment demonstrates 97.83% F-measure of music transcription. 
Volume: 13
Issue: 1
Page: 103-117
Publish at: 2015-03-01

A Detection Method for Transmission Line Insulators Based on an Improved FCM Algorithm

10.12928/telkomnika.v13i1.1319
BoWen; Northeast Dianli University Wang , Quan; University of Glasgow Gu
An improved segmentation Fuzzy C-Means algorithm (FCM) is proposed for the image recognition of transmission line insulators. In this paper, the improved Wiener filter algorithm is firstly used to filtrate and recover image in pre-processing. Then, the insulator image is segmented based on the improved algorithm FCM. Finally, the contour of insulator is labelled by using connected component labelling algorithm. Experimental results have shown that the improved Wiener filtering algorithm may effectively filter and recover the images; furthermore, the improved FCM image segmentation algorithm may accurately segment insulators from the image.
Volume: 13
Issue: 1
Page: 164-172
Publish at: 2015-03-01

Improved Leader Follower Formation controller for multiple Quadrotors based AFSA

10.12928/telkomnika.v13i1.994
Rabah; Beijing Institute of Technology Abbas , Qinghe; Beijing Institute of Technology Wu
In this paper, formation tracking in  plane with equal height for all quadrotors is discussed. Two controllers are necessary. First, PID controller is used to ensure the tracking of the desired trajectory by the first quadrotor named leader. The formation of the quadrotors in  plane is achieved by using the directed lyapunov controller. In order to improve the controller performances, the artificial fish swarm algorithm is used to ensure the dynamic optimization of the parameter controllers. When the desired shape formation is achieved, PID controller is used again to ensure the keeping of this formation shape. Finally, simulation results demonstrate the effectiveness of the proposed controllers compared to the ordinary controller and also compared to the static optimization by using the same algorithm.
Volume: 13
Issue: 1
Page: 85-92
Publish at: 2015-03-01

Image Edge Feature Extraction and Refining Based on Genetic-Ant Colony Algorithm

10.12928/telkomnika.v13i1.1264
Xing; Henan University of Urban Construction Zhang , Shuai; Henan University of Urban Construction Liu
Edge is composed by a collection of its nearby pixels which has a step change or changes in roof, an image is an information system and most of its information comes from the edges. This paper gives a brief overview of the status and the importance of image edge detection and introduces the research status of the image edge detection. After that, it introduces the basic principle and the main steps of the genetic algorithm and ant colony algorithm. On the basis of these, the paper proposed a new hybrid algorithm for the image edge extraction and refining, which combined the genetic algorithm and ant colony algorithm. Through the analysis of the time-speed graph of the genetic algorithm and the ant colony algorithm, we can find the best fusion point between the genetic algorithm and the ant colony algorithm. The experiment indicated the proposed hybrid algorithm can make the full use of the image information, the simulation time is shorter, the image edge is more continuous, and preserved the outline of original image more completely.
Volume: 13
Issue: 1
Page: 118-127
Publish at: 2015-03-01

Modeling and Control of Standalone Direct-Driven PMSG WECS for Grid Compatibility at Varying Wind Speeds

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4219
Shilpa Mishra , S Chatterji , Shimi S.L. , Sandeep Shukla
Wind energy is one of the most available and exploitable forms of renewable energy. Variable speed PMSG based Wind Energy Conversion System (WECS) offers many advantages compared to the fixed speed squirrel cage induction generators such as improved stator output operation at better power factor, no maintenance cost for gear box (as it is direct-driven) reduction in weight and losses, higher efficiency and ability to run at low speeds. The elimination of the gear box and brushes can enhance the efficiency of wind turbine by 10%. In this paper a Permanent Magnet Synchronous Generator (PMSG) is modeled whose stator is connected to the constant single phase load (in place of grid) through AC/DC thyristors based rectifier followed by capacitor (dc-link) and DC/DC converter control. Overall arrangement provides constant output to connected load if applied with proper controlling techniques. Hence this proposed wind generation system design can be extended for grid connection also via DC/AC inverter control. Results are simulated and verified in MATLAB/Simulink platform at constant rated (12m/s) and varying (stepped) wind speed for smooth and constant output voltage. DOI: http://dx.doi.org/10.11591/telkomnika.v13i3.7097
Volume: 13
Issue: 3
Page: 410-417
Publish at: 2015-03-01

Hierarchical-map Updating Approach for Simultaneous Localization and Mapping of Mobile Robots

10.12928/telkomnika.v13i1.1275
Yingmin; Xi’an University of Technology Yi , Zhimin; Xi’an University of Technology Wang
For the tremendously increasing of system state in wild field, the computational complexities of mobile robot system should be taken into account. This paper proposes a hierarchical-map updating approach for simultaneous localization and mapping of robots. The basic idea of hierarchical-map is defining two kinds of maps during the recursive updating process, namely local map (upper map) and global map (lower map). The system states will be updated by the preset maps. The hierarchical-map updating process is just for the upper map and the lower map is updated after a certain running term. In the calculation, the state data of the upper map is far less than that of the lower map. It is validated by the experiments that, the approach is more optimal than others in computational complexities while ensuring the consistency estimate.
Volume: 13
Issue: 1
Page: 93-102
Publish at: 2015-03-01

Data Partition and Communication On Parallel Heuristik Model Based on Clonal Selection Algorithm

10.12928/telkomnika.v13i1.728
Ayi; School of Electrical Engineering and Informatics, Bandung Institute of Technology Purbasari , Iping Supriana; School of Electrical Engineering and Informatics, Bandung Institute of Technology Suwardi , Oerip Slamet; School of Electrical Engineering and Informatics, Bandung Institute of Technology Santoso , Rila; School of Electrical Engineering and Informatics, Bandung Institute of Technology Mandala
Researchers conducted experiments on parallel algorithms, which are inspired by the clonal selection, called Clonal Selection Algorithm (CSA). This algorithm is a population-based heuristic solution. Course-grained parallelism model applied to improve the execution time. Inter-process communication overhead is addressed by adjusting the communication frequencies and size of data communicated. In this research, conducted experiments on six parallel computing models represent all possible partitions and communications. Experiments conducted using data of NP-Problem, Traveling Salesman Problem (TSP). The algorithm is implemented using the model of message passing libraries using MPJExpress. Experiments conducted in a cluster computation environment. Result shows the best parallelism model is achieved by partitioning the initial population data at the beginning of communication and the end of generation. Communication frequency can be up to per 1% of the population size generated. Using four dataset from TSPLib, this reseache shows effect of the communication frequency that increased the best cost, from 44.16% to 87.01% for berlin52.tsp; from 9.61% to 53.43%  for kroA100.tsp, and from 12.22% to 17.18% for tsp225.tsp. With eight processors, using communication frequency will be reduced the execution time e.g 93.07%, 91.60%, 89.60%, 74.74% for burma14.tsp, berlin52.tsp, kroA100.tsp, and tsp225.tsp respectively. We conclude that frequency of communication greatly affects the execution time, and also the best cost. It improved execution time and best cost.
Volume: 13
Issue: 1
Page: 193-201
Publish at: 2015-03-01

Countering Node Misbehavior Attacks using Trust Based Secure Routing Protocol

10.12928/telkomnika.v13i1.1181
Adnan; Universiti Teknologi Malaysia (UTM), Skudai, Johor Bahru, Malaysia Ahmed , Kamalrulnizam; Universiti Teknologi Malaysia (UTM), Skudai, Johor Bahru, Malaysia Abu Bakar , Muhammad Ibrahim; Department of Information Technology, Quaid-e-Awam University of Engineering, Science and Technology, Nawabshah Channa , Khalid; Universiti Teknologi Malaysia (UTM), Skudai, Johor Bahru, Malaysia Haseeb
Wireless sensor networks have gained remarkable appreciation over the last few years. Despite significant advantages and tremendous applications, WSN is vulnerable to variety of attacks. Due to resource constraint nature of WSN, applicability of traditional security solutions is debatable. Although cryptography, authentication and confidentiality measures help in preventing specific types of attacks but they cannot safeguard against node misbehavior attacks and come at significant cost. To address this problem, we propose a Trust Based Secure Routing Protocol (TBSRP) which adopts on-demand routing principle and relies on distributed trust model for the detection and isolation of misbehaving nodes. The TBSRP aims to establish shortest path that contain all trusted nodes, identify packet forwarding misbehavior caused by malicious and faulty nodes and reroute the traffic to other reliable paths. The performance of TBSRP is evaluated in terms of packet delivery ratio, average end-to-end delay, normalized routing load and average throughput. Simulations results show that TBSRP can achieve both high delivery ratio and throughput in presence of various numbers of misbehaving and faulty nodes.
Volume: 13
Issue: 1
Page: 260-268
Publish at: 2015-03-01
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