Articles

Access the latest knowledge in applied science, electrical engineering, computer science and information technology, education, and health.

Advanced Search
Filter Icon

Filters article

Years

FAQ Arrow
Single Year
Range Year
0
0

Source Title

FAQ Arrow

Authors

FAQ Arrow

25,002 Article Results

Reorganization of intruder Using Ad-Hoc Network And RFID

10.11591/ijra.v3i4.pp268-271
Vishakha Hagawane , Anukriti Anup Shrivastav , Kartiki Tambekar
This system is to develop a centralized computer application that needs to identify moving person in a specific area using wireless network. In this paper, we develop a new indoor tracking algorithm using received signal strength. The RFID is able to detect the humans and provide information about the direction of the movement. The gathered information from the node is to be given to the base station for processing. . This application is able to detect and track person, and report direction of the intruder to a central base station. In this system we design nodes through which we are able to track the person. The human intruder is detected using Zigbee.
Volume: 3
Issue: 4
Page: 268-271
Publish at: 2014-12-01

Student Motivation and Learning Strategies of Students from USA, China and Bangladesh

https://ijere.iaescore.com/index.php/IJERE/article/view/4479
Quamrul H Mazumder
To better understand the motivation and strategies used by students around the world, a comparative study among three different countries was performed.The current study used the Motivated Strategies for Learning Questionnaire (MSLQ) questionnaire to collect responses from students in public and private universities of Bangladesh.The results were also used to compare the differences between public and private universities of Bangladesh, as there is a national debate on the quality of these two types of universities in Bangladesh.The number of students that participated in this study was 164 with 143 from private universities and 21 from public universities. The number of lower responses from public universities may be an indicator of their lack of motivation to participate in this study. MSLQ questionnaires have been used and adapted by universities across the world as a valid instrument to measure the level of motivation and the learning process.The survey consists of 18 questions to evaluate motivation and learning strategies. The results of the responses from Bangladesh were compared with a previous study between students of USA and China [9].There was no significant difference between public and private universities in Bangladesh in most of the categories.However, some differences were observed among these three countries indicating that students from different geographical regions may have different levels of motivation and learn differently.DOI: http://doi.org/10.11591/ijere.v3i4.6288
Volume: 3
Issue: 4
Page: 205-210
Publish at: 2014-12-01

Novel Approach to Control of Robotic Hand Using Flex Sensors

10.11591/ijra.v3i4.pp234-244
Sandesh R.S , Nithya Venkatesan
This paper discuss about novel design approach to control of a robotic hand using flex sensors which indicates a biomechatronic multi fingered robotic hand. This robotic hand consists of base unit, upper arm, lower arm, palm and five fingers. The aim is to develop an anthropomorphic five fingered robotic hand. The proposed design illustrates the use of 5 micro DC motors with 9 Degrees of Freedom (DOF).Each finger is controlled independently. Further three extra motors were used for the control of wrist elbow and base movement. The study of the DC motor is being carried out using the transfer function model for constant excitation. The micro DC motor performance was analyzed using MATLAB simulation environment. The whole system is implemented using flex sensors. The flex sensors placed on the human hand gloves appear as if they look like real human hand.  89v51 microcontroller was used for all the controlling actions along with RF transmitter/receiver .The performance of the system has been conducted experimentally and studied.
Volume: 3
Issue: 4
Page: 234-244
Publish at: 2014-12-01

Fuzzy Controlled Routing in a Swarm Robotic Network

10.11591/ijra.v3i4.pp272-276
Navya Manoj
Swarm Robotics originated in the research inspired by biology. It is the usual sense of the multi-robot systems which have been given the emerging attributes of swarm intelligence. In nature, ants, termites, wasps, bees and other social insects have inspired surprisingly inspiration of human. These groups of organisms show how to interact with a large number of simple individuals and generate the collective intelligence of systems to cope with complicated tasks. Swarm Robotics is a special robot system which is composed of a group of indiscriminate robots and so it is a typical distributed system. If a task is for only one robot and the robot will be very complex and expensive inefficiently. But if it is for the swarm robotics, the complex task can be done by many more simple robots efficiently. For the Routing problem, the quality of a potential route is determined by the length of the route (i.e. number of links) and the congestion along the route. It is desired to balance the traffic load among links in the network so it is desirable to select routes with a low obstacle rate. In addition, shorter routes are preferred over longer routes because they use fewer network resources
Volume: 3
Issue: 4
Page: 272-276
Publish at: 2014-12-01

The Influence of Principals Self Personality Values towards Their Work Culture

https://ijere.iaescore.com/index.php/IJERE/article/view/4482
Muhammad Asri , Lokman Bin Mohd. Tahir
This study aimed to identify the influence of principals’ self personality values toward teachers’ work culture in high schools. The sample consisted of 34 principals from SMAN, SMKN and MAN in the City of Makassar, South Sulawesi Indonesia. The sample of this study is population sample. The instrument used was a questionnaire. Data were analyzed using Statistical Package for Social application software Science version 20.0. Two statistics were used descriptive statistics including the mean score and inference of linear to test the hypothesis. The reliability (Cronbach Alpha) for the instruments used in this study is 0.879. The results show that honesty and compliance are both top components of self values of principals in implementing principalship at school. There was also a significant influence on self personality values of principals toward teachers’ work culture at school.DOI: http://dx.doi.org/10.11591/ijere.v3i4.6961
Volume: 3
Issue: 4
Page: 228-235
Publish at: 2014-12-01

Economic Load Dispatch for Multi-Generator Systems with Units Having Nonlinear and Discontinuous Cost Curves Using Gravity Search Algorithm

10.11591/ijape.v3.i3.pp166-174
Tunir Dey
Economic Load Dispatch aims at distributing the load demand between various generation stations in a system such that the total cost of generation is minimum. This is of vital importance since it not only reduces the operation cost of the generation utility but also helps in conserving fast dwindling energy resources. Modern day power systems are large interconnected systems with a large number of generator units each having its own cost curve. Ideally the cost function of a unit is a quadratic function of the power generated by the unit and the cost curve obtained is a smooth parabola. But in practice cost curves deviate from the idealised one due the several reasons such as valve point effect, multi fuel operation, existence of forbidden zones etc. and as such may not be continuous or analytic. Also for a large interconnected system it becomes essential to consider the effect of transmission losses. Conventional numerical method based approaches work well with systems without losses but for large systems with losses obtaining convergence becomes difficult as the number of iterations required as well as the computational time are very high. These methods fail entirely if non ideal cost curves are considered. Hence soft computing based methods become essential. Here Gravity Search Algorithm(GSA) has been used to for finding economic load scheduling in a multi generator system, given a certain load demand, and taking into consideration the effects of practical constraints on the idealised load curve. The algorithms for finding the economic scheduling has been written in Matlab and has provided satisfactory results based on the given tolerance values. Also the traditional and soft computing based approaches have been compared to demonstrate the advantages of one over the other.
Volume: 3
Issue: 3
Page: 166-174
Publish at: 2014-12-01

Investigation of Electric Field Distribution Inside 500/220 kV Transformation Substations during Different Working Conditions

10.11591/ijape.v3.i3.pp175-189
Sayed A. Ward , Samy M. Ghania , Essam M Shaalan
This study depicts the electric field distributions inside a typical 500/220 kV open distribution substation under actual loading conditions and during different working conditions, Hot-Stick position and Bar-Hand position. The electric field is investigated for different workers heights of 1m, 1.5m and 1.8m above ground during normal working condition (Hot-Stick position) inside this substation. This in addition to assessment of the electric field at a height levels of 8m, 11m, 14m and 17m above ground as positions for live line maintenance under 220 kV Busbars, 500 kV Busbars, 220 kV Incoming and Outgoing feeders and 500 kV Incoming and Outgoing feeders respectively. In this study the simulation results of the electric field obtained using three dimensional (3D) computer model for existing typical high voltage transformation substation are compared with field values measured inside this typical substation and presented and discussed not only in the form of contour maps but also in the form 3D surface and wireframe maps. The simulation results are good matched and agreed with measured values. This in addition to the electric field will be tabulated and compared to international guidelines for personnel exposure to electric field. This study will serve for planning service works or for inspection of equipment inside high voltage (HV) power transformation substations.
Volume: 3
Issue: 3
Page: 175-189
Publish at: 2014-12-01

PMU-Based Transmission Line Parameter Identification at China Southern Power Grid

10.11591/ijape.v3.i3.pp190-198
Zhou Huafeng , Zhao Xuanyu , Shi Di , Zhao Huashi , Jing Chaoyang
China Southern Power Grid Company (CSG) recently developed and implemented an online PMU-based transmission line (TL) parameter identification system (TPIS). Traditionally, TL parameters are calculated based on transmission tower geometries, conductor dimension, estimates of line length, conductor sags, etc. These parameters only approximate the effect of conductor sag and ignore the dependence of impedance parameters on temperature variation. Recent development in PMU technology has made it possible to calculate TL parameters accurately. The challenges are that such application requires highly accurate PMU data while the accuracy of PMU measurements under different working/system conditions can be uncertain. With a large number of PMUs widely installed in its system, CSG plans to improve and update the EMS database using the newly developed TPIS. TPIS provides an innovative yet practical problem formulation and solution for TL parameter identification. In addition, it proposes a new metric that can be used to determine the credibility of the calculated parameters, which is missing in the literature. This paper discusses the methodologies, challenges, as well as implementation issues noticed during the development of TPIS.
Volume: 3
Issue: 3
Page: 190-198
Publish at: 2014-12-01

An Application of Ulam-Hyers Stability in DC Motors

10.11591/ijape.v3.i3.pp149-156
Abasalt Bodaghi , Naser Pargali
In this paper, a generalization to nonlinear systems is proposed and applied to the motor dynamic, rotor model and stator model in DC motor equation. We argue that Ulam-Hyers stability concept is quite significant in design problems and in design analysis for the class of DC motor’s parameters. We prove the stability of nonlinear partial differential equation by using Banach’s contraction principle. As an application, the Ulam-Hyers stability of DC motor dynamics equations is investigated. To the best of our knowledge this is the first time Ulam-Hyers stability is considered from the applications point of view.
Volume: 3
Issue: 3
Page: 149-156
Publish at: 2014-12-01

Enhancing Photoelectric Conversion Efficiency of Solar Panel by Water Cooling

10.11591/ijape.v3.i3.pp199-204
M Mohamed Musthafa
Photovoltaic solar cell generates electricity by receiving solar irradiance. The electrical efficiency of photovoltaic (PV) cell is adversely affected by the significant increase of cell operating temperature during absorption of solar radiation. This undesirable effect can be partially avoided by cooling the back side of the photovoltaic panel using water absorption sponge which  was fixed on of PV panel and maintain wet condition by circulation of drop by drop water. The objective of the present work is to reduce the temperature of  the solar cell in order to increase its electrical efficiency.  Experiments were performed with and without water cooling. A linear trend between the efficiency and temperature was found. Without cooling, the temperature of the panel was high and solar cells were achieved an efficiency of 8–9%. However, when the panel was operated under water cooling condition, the temperature dropped maximally by 40C leading to an increase in efficiency of solar cells by 12%.
Volume: 3
Issue: 3
Page: 199-204
Publish at: 2014-12-01

The Automatic Recognition of Large Ball Valve Sealing Bolt Based on Digital Image

10.11591/ijeecs.v12.i12.pp8152-8160
Song Qingjun , Xiao Xingming , Jiang Haiyan , Zhao Xieguang
In this paper, we adopted the area filling method of the mathematical morphology to fill the holes of the nut. In addition, the bimodal method and multi-threshold method were combined for the image segmentation. Furthermore, the image edge was detected by mathematical morphology algorithm. Finally, the angle between the bolt and manipulator was calculated using the rotation conversion matrix. With the systematic error and correlation coefficient, the calculated angle was verified. Experimental results show that the method can protect the edge integrity of the nut image, with fast processing speed and strong anti-noise ability. The work in this paper provides a theoretical basis for the automatic recognition in the large ball valve sealing bolt system.
Volume: 12
Issue: 12
Page: 8152-8160
Publish at: 2014-12-01

Knowledge Management System for Zakat

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3955
Aulia Rahman Nasution , Irman Hermadi , Wisnu Ananta K. , Irfan Syauqi B.
Zakat is one of the Islamic pillars that has strategic contribution to the society. Zakat is one of the  Muslim obligation. It is also a form of social solidarity. The collaborative research conducted by Badan Amil Zakat Nasional (BAZNas) and Institut Pertanian Bogor (IPB) estimated the potential of zakat collection in Indonesia could reach about Rp 217 trillion every year that has not been achieved yet. Researchers and practitioners have advised to implement a Knowledge Management System (KMS) to optimize the collection and BAZNas’s objectives. The objective of this research is to develop web-based Zakat Knowledge Management System (ZKMS). The KMS development methodology is done with using Knowledge Management System Life Cycle (KMSLC). Knowledge has been captured from experts consisting of practitioners and scientists from BAZNas of Bogor City, muzakki, documents, books and journals. ZKMS was developed using ASP.NET framework, C# programming language and MySQL database management system. The system has menu that are user, zakat knowledge, questions and answers with experts, interaction between members, about us, profiles and knowledge sources. This system is designed be user friendly to get, know, make, share, store and disseminate actual and contemporary of zakat knowledge. http://dx.doi.org/10.11591/telkomnika.v12i12.6842 
Volume: 12
Issue: 12
Page: 8349-8356
Publish at: 2014-12-01

Improving Light-Load Efficiency by Eliminating Interaction Effect in the Grid Connected Doubly-Fed Induction Generator

10.11591/ijape.v3.i3.pp157-165
Seyed Esmaeel Mirhosseini Niri , Abdolhossain Tahani , Mohammad Yazdani-Asrami , S. Asghar Gholamian
A wind turbine equipped with doubly-fed induction generator (DFIG) is used in wind power plant industry. This paper studies the maximum power extraction of DFIG via evaluation of state-space equations in closed loop control condition for improving light-load efficiency. The DFIG state-space equations have been considered in the form of a multi-input- multi output (MIMO) system. Also, the tracing table has been used to determine the speed which the generated power will be proportional to the maximum load. The tracing table input is the generator speed, and its output is the optimum active power that has been considered as the reference power of the active power control system of the convertor. A controller is presented for the tracing table and the extracted power is able to follow the reference power with minimum ripple. Then, the results are compared with the single-input and single-output (SISO) case, for the values up to 0.2 times of the rated load. Therefore, in MIMO modeling, in the case that the DFIG connected to the grid, by eliminating the interaction effect, the efficiency in light-load can be increased.
Volume: 3
Issue: 3
Page: 157-165
Publish at: 2014-12-01

Application of Chaotic Particle Swarm Optimization in Wavelet Neural Network

10.12928/telkomnika.v12i4.533
Cuijie; Tianjin University of Finance and Economics Zhao , Guozhen; Bohai Professional and Technical College Wang
Currently, the method of optimizing the wavelet neural network with particle swarm plays a certain role in improving the convergence speed and accuracy; however, it is not a good solution for problems of turning into local extrema and poor global search ability. To solve these problems, this paper, based on the particle swarm optimization, puts forward an improved method, which is introducing the chaos mechanism into the algorithm of chaotic particle swarm optimization. Through a series of comparative simulation experiments, it proves that applying this algorithm to optimize the wavelet neural network can successfully solve the problems of turning into local extrema, and improve the convergence speed of the network, in the meantime, reduce the output error and improve the search ability of the algorithm. In general, it helps a lot to improve the overall performance of the wavelet neural network.
Volume: 12
Issue: 4
Page: 997-1004
Publish at: 2014-12-01

A New Algorithm for Detecting Local Community Based on Random Walk

10.12928/telkomnika.v12i4.438
Yueping; Shenzhen Polytechnic Li , Weikun; Shenzhen Institute of Information Technology Zheng
This paper presents one new algorithm for local community discovery. It employs a new vertex selection strategy which considers not only the boundary structure of candidate local community but also the probability which the investigated vertex will return to the candidate local community. A local random walk is adopted to compute this return probability which does not require the global information. We choose four algorithms for comparison which are the best ones existed by far. For better evaluation, the datasets include not only the computer generated graphs in standard benchmark but also the real-world networks which are classical ones in global community discovery. The experimental results show our algorithm outperforms the other ones on the computer generated graphs. The performance of our algorithm is approximately the same with the algorithm proposed by Luo, Wang and Promislow on real-world networks.
Volume: 12
Issue: 4
Page: 1005-1016
Publish at: 2014-12-01
1 2 3
...
1666 1667
Show 1434 of 1667

Discover Our Library

Embark on a journey through our expansive collection of articles and let curiosity lead your path to innovation.

Explore Now
Library 3D Ilustration