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29,325 Article Results

A Graph Based Approach to Identify Objects using Identifying Attribute

10.11591/ijeecs.v6.i2.pp438-446
Anita Kushwaha , R.S. Pandey
We have proposed a method to identify objects in database schema using association degree with other objects. We have also used identifying attribute of associations in graph to specify a unique path to resolve ambiguity of Fuzzy Object Functional Dependencies. Recently Fuzzy Concepts were used in Object Oriented Data Models. The Object Identifier allows distinguishing between similar objects. Functional Dependencies play a dominant role to uniquely identify objects. Moreover object identification has now become a modeling concept rather than database concept so starting a search for objects with a set of values is possible. We have also investigated the presence of identifying attributes in fuzzy object schema and its implications.
Volume: 6
Issue: 2
Page: 438-446
Publish at: 2017-05-01

Suitability of Demand Response Program Equipped with Solar Energy in UTHM

10.11591/ijeecs.v6.i2.pp294-300
N A Jefry , N A Zambri
Demand Response Program (DRP) is a program developed in western country to cater high load demand. This system enhance the quality of the current smart grid system. This program encourage two-ways interaction between the consumer and the utility provider. The consumers are required to reduce their load consumption upon request by the utility provider, thus avoiding them from paying for the high load demand. However, the current design of DRP is seem to put the user at disadvantages. Thus, deployment of the new practice equipped with renewable energy sources will make the system more user- friendly. As DRP prove to be beneficial in many terms, this project is conducted to find DRP relevancy to be implemented in Universiti Tun Hussein Onn Malaysia (UTHM). According to the electrical consumption data disclosed by Facility Management Division, the power consumed by UTHM is remarkably high especially during 11.00 am to 12.00 pm. Thus, DRP is being proposed to be put into practise during this period. Nonetheless, it is not economically wise to implement the program to the whole campus. Therefore, three buildings with the most power consumption had been chosen for this study. They are the library, Faculty of Civil and Environmental Engineering (FKAAS) building and Faculty of Technology and Vocational Education (FPTV) building. The building power consumption and economic evaluation had been analysed using HOMER simulation. From the analysis, the combination of FPTV and FKAAS had been chosen for DRP implementation. The reason are, these buildings have superiority over the library in term of reliability and effectiveness. In terms of economy, it is almost equivalent to each other.
Volume: 6
Issue: 2
Page: 294-300
Publish at: 2017-05-01

Creating Model with System Breakdown Structure for System Dynamics

10.11591/ijeecs.v6.i2.pp447-456
Feldiansyah Bin Bakri Nasution , Nor Erne Nazira Bazin
A system is developed as a set of components and subsystems. A subsystem is a smaller system inside the main system and consists of its constituent components. The continual improvement process concept is adopted in System Dynamics’s model creation. New components or subsystems are identified in each cycle of the process. The interrelation between components could be changed as the time is running. The continual improvement process is an ongoing effort in identifying an ideal model. In this paper, the system is explained as the set theory for better understanding. It is emphasized that by breaking down the system into smaller entity such as components and subsystems will make the analytics process more systematic and scalable. It is called as System Breakdown Structure (SBS). At the end of this paper, the model before and after SBS are evaluated by comparing the output and the state of system.
Volume: 6
Issue: 2
Page: 447-456
Publish at: 2017-05-01

Optimization Circuit Based Buck-Boost Converter for Charging the Solar Power Plant

10.11591/ijeecs.v6.i2.pp254-258
Rohana Rohana , Suwarno Suwarno
This paper discusses the optimization circuit based buck-boost converter for charging a battery from solar panel modules. The combination of the circuit buck-bust converter and a step-up current can increase the percentage of battery chargers. The method used in the optimization of solar power plants by increasing the output current from the solar panel to be optimized for battery charging, so it does not requires time and the batteries are safe. This is because sunlight can be used when bright about 4-5 hours per day. By increasing the output current of the current produced solar modules can accelerate the battery charging time. The combination of using the voltage stabilizer can produce a steady output voltage and current riser, although the voltage to an output of the solar panels is quite small (± 6 volts), can optimize the charger works well. By combining between the voltage stabilizer and a step-up current is obtained that the incoming voltage to the battery at 12,4V the current rise of 21.5% for a 12V battery, 7Ah, whereas the incoming voltage to the battery at 12,1V the current rise 10.99% for battery 12V, 120Ah. This study shows that the current rise is already above 10%.
Volume: 6
Issue: 2
Page: 254-258
Publish at: 2017-05-01

Comparison of Flying Capacitor Fifteen Level Inverter and Thirty Three Level Inverter PWM Control Strategies

10.11591/ijeecs.v6.i2.pp368-378
Farouk Hadj Benali , Fouad Azzouz
In the paper two PWM control strategies of multilevel flying capacitor inverter is proposed. The study starts with a presentation of the Flying capacitor inverter and the two PWM control strategies (SPWM and Suboptimal PWM). Than a section which presents a brief recall of the triangular multicarrier PWM and the sinusoidal multicarrier PWM. A comparison between the two PWM control strategies based on the simulation results is made. The subjects of comparison are the root mean square rms of the output voltage and the total harmonic distortion THD. The obtained results have proved that the Suboptimal PWM is better than the SPWM. Simulations are carried out by PSIM program.
Volume: 6
Issue: 2
Page: 368-378
Publish at: 2017-05-01

Development of Educational Game for Primary School Mathematics using Microsoft Kinect

10.11591/ijeecs.v6.i2.pp457-463
Teddy Surya Gunawan , Bakhtiar Bahari , Mira Kartiwi
This research focuses on the design and development educational game using Microsoft Kinect. The edugame can be used as educational tool in a classroom as to create an interesting and interactive learning process. This research is also focused on mathematics as its educational content using Microsoft Visual C#, XNA Game Studio, Microsoft Kinect for Windows SDK, and Microsoft Kinect as the main hardware. There are about eleven topics regarding mathematics based on the module provided by the Malaysian Ministry of Education. The interface of the game has been designed and developed to be interactive and attractive using some cartoon graphics, such as Ipin, Boboiboy, and Yaya. The developed game is a quiz base program, where student will have 10 questions each round and 4 choices of answers for every question. Currently, this educational game is designed for Year 1, Year 2 and Year 3 primary school students, and it has been evaluated by a group of 8 students. Furthemore, it has been evaluated and validated by a school teacher, in which they confirm the effectiveness of the developed game to improve student’s learning on Mathematics.
Volume: 6
Issue: 2
Page: 457-463
Publish at: 2017-05-01

Investigation of Lossless Audio Compression using IEEE 1857.2 Advanced Audio Coding

10.11591/ijeecs.v6.i2.pp422-430
Teddy Surya Gunawan , Muhammad Khalif Mat Zain , Fathiah Abdul Muin , Mira Kartiwi
Audio compression is a method of reducing the space demand and aid transmission of the source file which then can be categorized by lossy and lossless compression. Lossless audio compression was considered to be a luxury previously due to the limited storage space. However, as storage technology progresses, lossless audio files can be seen as the only plausible choice for those seeking the ultimate audio quality experience. There are a lot of commonly used lossless codecs are FLAC, Wavpack, ALAC, Monkey Audio, True Audio, etc. The IEEE Standard for Advanced Audio Coding (IEEE 1857.2) is a new standard approved by IEEE in 2013 that covers both lossy and lossless audio compression tools. A lot of research has been done on this standard, but this paper will focus more on whether the IEEE 1857.2 lossless audio codec to be a viable alternative to other existing codecs in its current state. Therefore, the objective of this paper is to investigate the codec’s operation as initial measurements performed by researchers show that the lossless compression performance of the IEEE compressor is better than any traditional encoders, while the encoding speed is slower which can be further optimized.
Volume: 6
Issue: 2
Page: 422-430
Publish at: 2017-05-01

Current PI-Gain Determination for Permanent Magnet Synchronous Motor by using Particle Swarm Optimization

10.11591/ijeecs.v6.i2.pp412-421
Ahmad Asri Abd Samat , M.S Zainal , L.N Ismail , Wan Salha Saidon , A. Idzwan Tajudin
This paper proposes the modern approach using Particle Swarm Optimization (PSO) algorithm in determining the ideal value of Proportional Integral (PI) gain for current controller of Permanent Magnet Synchronous Motor (PMSM). Controlling the torque of PMSM and optimizing the PI-gain are the main objectives of this project. The PI controller is employed to control the speed and the torque of the PMSM with the implementation of Field Oriented Control (FOC) method. This new proposed PSO technique proved that the ability in reducing the torque ripple compared to conventional heuristic method. The ideal PI-gain acquired from the PSO was included into current PI controller. From the result obtained, it shows that the viability of the PSO technique is the best to determine PI-gain for current controller.
Volume: 6
Issue: 2
Page: 412-421
Publish at: 2017-05-01

Real-Time LCD Digit Recognition System

10.11591/ijeecs.v6.i2.pp402-411
N. M. Saad , N. S. M. Noor , A. R. Abdullah , O. Y. Fong , N. N. S. A. Rahman
In recent years, the utilization of digital instruments in industries is quickly expanding. This is because digital instruments are typically more exact than the analog instruments, and easier to be read as they are hooked up to a liquid-crystal display (LCD). However, manual data entry from LCD display is tedious and less accurate. This paper proposes a real-time LCD digit recognition system for the industrial purposes. The system is interfaced with an IP webcam to capture the video frames from the LCD display. The digital data is pre-processed into grayscale and being cropped into a selected region of interest (ROI). Adaptive thresholding and morphological operation are applied for the digit segmentation process. Data extraction and characterization are done by utilizing neural network classifier. Finally, all the information are logged out to Microsoft Excel spreadsheet. The 90% accuracy is accomplished for 50 test images of various LCD display.
Volume: 6
Issue: 2
Page: 402-411
Publish at: 2017-05-01

A Voltage Improvement of Transmission System using Static Var Compensator via Matlab/Simulink

10.11591/ijeecs.v6.i2.pp330-337
Siti Amely Jumaat , Ismail Musirin , Mazliya Mohd Baharun
High demand in electricity consumption is rising and modern society would case to function without access to electricity. The volume of power transmitted and distributed are increasing, these need the requirements for high quality and reliable supply. At the same time, rising the costs and the growing environmental concerns make the process of develop a new power transmission line make complicated and the time consuming. One of alternatives to solve the issues is installed the Flexible AC Transmission System (FACTS). This research presents to modeling and simulation of Static Var Compensator (SVC) in the power system network using Matlab/Simulink Software. The objective function of this research is improvement the voltage of the system with four cases study for validation. From the simulation results shown that the SVC installation gives the effect to voltage of system.
Volume: 6
Issue: 2
Page: 330-337
Publish at: 2017-05-01

An Improved Features of Health Screening Test System for Malaysian Social Security Organisation (SOCSO) Programme

10.11591/ijeecs.v6.i2.pp473-481
A. R. Abdullah , A. R. Syafeeza , M. A. U. C. Mood , T. N. S. T. Zawawi , A. R. Munzier
The purpose of this paper is to improve the features of Health Screening Test System (HSTS) on Social Security Organization (SOCSO) program as physical evaluation for musculoskeletal disable workers (MSDs). SOCSO existing functional testing system are not suitable because of the evaluation was recorded manually peg board too high for Asian people. The occupational therapist whose involve in all the procedures is just doing the judgment in times to determine the capability of the patients. The functional capacity evaluation (FCE) technique is based on the functional range of motion evaluation that consist of positional tolerance respecting to time-motion testing on HSTS peg board and it is by referring to the original work movement. The main features of HSTS are able to measure speed, acceleration and evaluation of SOCSO’s patients for returning to work based on SOCSO’s requirement. In order to validate the accuracy of the proposed model, HSTS is used to evaluate the patient’s positional tolerance and then the result would be compare over the time frame which is Method Time Measurement (MTM) standard. This method is able to provide information and feedback for therapies as a status of patients. It is found that the proposed model is superior in getting the accurate time test for patient’s movements besides practicable and suitable for physical evaluation on MSD patients.
Volume: 6
Issue: 2
Page: 473-481
Publish at: 2017-05-01

A Comparison Study on Types of PV for Grid Connected Photovoltaic Power

10.11591/ijeecs.v6.i2.pp349-356
Renuga Verayiah , Anusiya Iyadurai
Grid connected photovoltaic (PV) power systems is today’s breakthrough for renewable energy source in electricity generation Grid-connected photovoltaic (PV) power systems have the advantage of more effective utilization for highest renewable source of electricity generation and tendency to continual growth in the next years. The output performance grid connected photovoltaic (PV) power systems is influenced by the impact of cell temperature or ambient temperature and solar irradiance of the solar module. This paper highlights the effect of output energy of solar module by implementing different types of solar module technology and selecting the highest energy output of the module technology for modelling and simulating the design of grid connected photovoltaic (PV) power system using Matlab/Simulink.
Volume: 6
Issue: 2
Page: 349-356
Publish at: 2017-05-01

Symmetrical Short Circuit Parameter Differences of Double Fed Induction Generator and Synchronous Generator Based Wind Turbine

10.11591/ijeecs.v6.i2.pp268-277
Muhammad Shahzad Nazir , Qinghua Wu , Mengshi Li , Luliang Zhang
Considering the importance of perturbations during short circuit (SC) in power conversion devices, this study designed to find out the efficacy of symmetrical short circuit (SSC) of the synchronous generator (SG) and doubly fed induction generators (DFIG). Both wind power systems were separately built (Park’s model) and simulated. Simulation results showed that the DFIG is more efficient, fault tolerant, and proficient systems as compared to the SG based on the transient time, steady state, maximum current, and voltage dip values. This study can extend to design protection schemes, more accurate, stable and optimal proficient wind power conversion devices.
Volume: 6
Issue: 2
Page: 268-277
Publish at: 2017-05-01

An Improved Photovoltaic Array Configuration for Photovoltaic System in the Presence of Maximum Power Point Tracking during Partial Shading Condition

10.11591/ijeecs.v6.i2.pp301-309
K. Burhanudin , N.A. Kamarzaman , A.A.A. Samat , A.I. Tajudin , S.S. Ramli , N. Hidayat
Power-Voltage (P-V) curve and Current-Voltage (I-V) curve determine the performance of the PV system. In this work, the arrangements of the PV module were reconstructed by adding the number of PV module in 3 strings configuration from 5 to 45. This method enhance the performance of the PV system as it able to show the characteristic of the P-V and I-V curve during partial shading and maximum irradiance despite higher number of PV panel. This study focuses on improving the PV array configuration and simulation speed of the PV panel. The simulation of small size PV array is possible, but the problem lies when the number of string and PV module used increases. New PV array configuration is flexible and easy to add string and increase the number of PV module. PV array configuration was modeled using MATLAB/SIMULINK software.
Volume: 6
Issue: 2
Page: 301-309
Publish at: 2017-05-01

Symbiotic Organisms Search Technique for SVC Installation in Voltage Control

10.11591/ijeecs.v6.i2.pp318-329
Mohamad Khairuzzaman Mohamad Zamani , Ismail Musirin , Saiful Izwan Suliman
Increasing demand experienced by electric utilities in many parts of the world involving developing country is a normal phenomenon. This can be due to the urbanization process of a system network, which may lead to possible voltage decay at the receiving buses if no proper offline study is conducted. Unplanned load increment can push the system to operate closes to its instability point. Various compensation schemes have been popularly invented and proposed in power system operation and planning. This would require offline studies, prior to real system implementation. This paper presents the implementation of Symbiotic Organisms Search (SOS) algorithm for solving optimal static VAr compensator (SVC) installation problem in power transmission systems. In this study, SOS was employed to perform voltage control study in a transmission system under several scenarios via the SVC installation scheme. This realizes the feasibility of SOS applications in addressing the compensating scheme for the voltage control study. Minimum and maximum bound of the voltage at all buses have been considered as the inequality constraints as one of the aspects. A validation process conducted on IEEE 26-Bus RTS realizes the feasibility of SOS in performing compensation scheme without violating system stability. Results obtained from the optimization process demonstrated that the proposed SOS optimization algorithm has successfully reduced the total voltage deviation index and improve the voltage profile in the test system. Comparative studies have been performed with respect to the established evolutionary programming (EP) and artificial immune system (AIS) algorithms, resulting in good agreement and has demonstrated its superiority. Results from this study could be beneficial to the power system community in the planning and operation departments in terms of giving offline information prior to real system implementation of the corresponding power system utility.
Volume: 6
Issue: 2
Page: 318-329
Publish at: 2017-05-01
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