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29,734 Article Results

A New Frequency for Offshore Wind-farm Based on Component Loss Calculation

10.11591/ijape.v7.i3.pp227-234
Koganti Srilakshmi , P. Aravindhababu , P. Ravi Babu
Offshore wind power plants are gaining importance in recent years, as there is adequate space available for its installation, high wind speed, no restriction on the size of turbine blades (no transportation and construction problem) and blades can be allowed to rotate at higher speed without any noise constraint, thereby increasing the rated power. However, the existing offshore wind farms face greater cost related challenges than those of onshore plants. The integration of offshore wind farm with onshore power grid is a complex issue. Feasible solutions for power transmission through cables from offshore wind farms to onshore are HVAC, line commutated HVDC  and  VSC-HVDC.  This paper analyses the various schemes for integration of offshore wind farm with onshore power grid and suggests that LFAC with submarine cable operating at 0.7 Hz is an optimal choice in obtaining better performances. 
Volume: 7
Issue: 3
Page: 227-234
Publish at: 2018-12-01

Interleaved Flyback Converter with Embedded Grid Interacting PV Cascaded MLI

10.11591/ijape.v7.i3.pp277-283
Jaikrishna V , Subhranhsu Sekhar Dash , Linss T Alex , R. Sridhar
The importance of extracting power from renewable energy sources are increasing in the modern world as the power demand is increasing day by day and the non renewable energy sources are getting dried up. Solar power is a domestic source of energy and its availability throughout the year makes it a primary target to solve this crisis. It will never produce any hazardous waste or pollution. But various issues like Power quality problems and Harmonic distortion seep in due to the intermittent nature of PV system. This paper proposes a cascaded H–bridge multilevel inverter for grid connected PV system with a flyback converter. This helps to achieve maximum power point tracking and also provides isolation which will further help to increase system efficiency. The DC–DC flyback converters are cascaded to generate multilevel output voltage. Then this multilevel dc output is given to H bridge inverter to generate multilevel output. A new control algorithm is used in this paper which combines voltage–hold Perturb and observe method and modified PWM algorithm which helps to achieve the best MPPT. The proposed topology is implemented in PSIM. The Simulation and Hardware results reveal that the suggested technique is highly.
Volume: 7
Issue: 3
Page: 277-283
Publish at: 2018-12-01

Light Control and Watering System in Greenhouse for The Cultivation of Chrysanthemum Sp

10.11591/ijeecs.v12.i3.pp950-957
Adam Faroqi , Muhammad Ali Ramdhani , Muhammad Fahmi Amrillah , Lia Kamelia , Eneng Nuraeni
Chrysanthemum (Chrysanthemum Sp) is sensitive to temperature and humidity. The greenhouse is an appropriate planting medium since temperature and humidity can be engineered there. This article presents the design of systems using DHT-22 and SEN0057 sensors. Real Time Clock (RTC) is used for providing timing input and functions as an extra light intensity timer. Arduino Mega 2560 is used as a microcontroller functioning to receive the results of sensor measurement and to give output instructions to condition the temperature and humidity. The testing on chrysanthemum Sp placed inside the greenhouse equipped with the system for 7 days shows an increase of height of 3.7 cm. As for chrysanthemum Sp placed outside the greenhouse equipped with the system for 7 days, there is an increase of height of 0, 2 cm. These greenhouse light control and Watering systems can engineer the temperature and humidity in accordance with the needs of chrysanthemum Sp cultivation in the greenhouse. 
Volume: 12
Issue: 3
Page: 950-957
Publish at: 2018-12-01

Cardiac Motions Classification on Sequential PSAX Echocardiogram

10.11591/ijeecs.v12.i3.pp1289-1296
Adam Shidqul Aziz , Riyanto Sigit , Achmad Basuki , Taufik Hidayat
Cardiac wall motions classification on 2-dimensional (2D) echocardiographic images is an important issue for quantitative diagnosiing of heart disease. Unfortunately, the bad quality of echocardiogram cause computationally classification on cardiac wall motions is still become a big homework for many researchers to provide the best result. Echocardiogram is produced by soundwaves which absolutely make its images have speckle noise in different intensity. Therefore, this research improves a set of methodology to classify cardiac wall motion semi-automatically. Raw echocardiogram will be enhanced and segmented to take the boundary of endocardium of left ventricular in PSAX cardiac images. New improvement of Semi-automatically methodology is approach on detecting the contour of endocardium and will be inputed as good features in Lucas-Kanade Optical Flow in all sequential echocargraphic images. On classifying cardiac wall motions, this research proposes two important features including length of displacement and flow direction. New proprosed flow determination algorithm and Euclidean distance is used to calculate those features. All the features will be trained by Neural Network (NN) and validated by Leave One Out (LOO) to get accurate result. NN method, which is validated by LOO, has the best result of 81.82% correctness than the other compared methods.
Volume: 12
Issue: 3
Page: 1289-1296
Publish at: 2018-12-01

New Two Simple Sinusoidal Generators with Four 45o Phase Shifted Voltage Outputs Using Single FDCCII and Grounded Components

10.11591/ijece.v8i6.pp5080-5088
Kasim K. Abdalla
Two new 45o phase shifted sinusoidal oscillator configurations employing single Second Generation Fully Differential Current Conveyor (FDCCII), two grounded capacitors and two grounded resistors are presented. The proposed oscillators can provide four sinusoidal voltage outputs with each a 45o phase difference. These circuits can also be utilized as voltage-mode quadrature oscillators. Additional output stages incorporation in FDCCII can also result in current outputs spaced 45 degree apart. The proposed circuits enjoy the simplicity and less passive and active component. The Total Harmonic Distortion (THD) of the output waveforms was reasonability values (less than 4.5%). The circuits can supply two equi-quadrature outputs and the Lissajous patterns confirm the quadrature voltage output waveforms. The workability of the circuits is simulated by PSPICE 0.18 μm CMOS technology. The non-ideal analysis and simulation results verifying theoretical analyses are also investigated.
Volume: 8
Issue: 6
Page: 5080-5088
Publish at: 2018-12-01

Seven Level Inverter Fault Mitigation Using Redundant Cell for Induction Motor Drive

10.11591/ijape.v7.i3.pp284-298
B. Madhu Kiran , B. V. Sanker Ram
Faults that might occur in inverter driven induction motor drives. In this paper, seven-level multi level inverter was taken up for testing of mitigation using redundant cell and the results were compared with five-level inverter to exhibit the performance of mitigation policy. This paper presents analysis of inverter feeding an induction motor drive when switch open and short fault occurs. When the fault occurs, the redundant cell activates and thus the drive system operates. In this paper, the function for redundant cell was explained with the results of drive system simulated in Matlab/Simulink.
Volume: 7
Issue: 3
Page: 284-298
Publish at: 2018-12-01

Robust Speed-Sensorless Vector Control of Doubly Fed Induction Motor Drive Using Sliding Mode Rotor Flux Observer

10.11591/ijape.v7.i3.pp235-250
Djamila Cherifi , Yahia Miloud
This paper presents a robust observer for sensorless speed control of doubly fed induction motor (DFIM), based on the slidin mode. In the first step, a model of the doubly fed induction motor fed by two PWM inverters with separate DC bus link is developed. In the second step and in order to provide a robust separate control between flux and motor speed a vector control by field oriented strategy applying a sliding mode regulator was implemented. Finally, speed estimation of a doubly fed induction motor based on sliding mode observer is presented. The simulation tests schow the effectiveness of the proposed method especially in the load disturbances, the change of the refrence speed and low speed. Also the influence of parameter variations will be studied by simulation
Volume: 7
Issue: 3
Page: 235-250
Publish at: 2018-12-01

Descending Viewer Method for Fault Tolerant Control

10.11591/ijape.v7.i3.pp199-210
K. Lenin
In this paper Descending Viewer Method (DVM) projected for finding and fault tolerant control of stator inter-turn short circuit faults in doubly-fed induction generators based in wind turbine. A process has been developed that allows the way from ostensible controllers designed for strong condition, to vigorous controllers designed for defective condition. Finally value of the rotor resistance estimated & is based on the use of the error between real and probable value of doubly fed induction generator (DFIG) in faulty condition, this will perk up the performance of this viewer. Simulation results show the reliability of the proposed Descending Viewer Method (DVM) approach.
Volume: 7
Issue: 3
Page: 199-210
Publish at: 2018-12-01

Multicarrier SPWM Control Techniques for Three Phase Eleven Level Diode Clamped Multilevel Inverter and Hybrid Inverter with Reduced Number of Components

10.11591/ijape.v7.i3.pp251-263
N. Susheela , P. Satish Kumar
A comparative analysis of three phase eleven level diode clamped multilevel inverter (DCMLI) and hybrid inverter is performed in this paper in which the later requires fewer carrier signals, less number of devices and gate drive circuits. The performance is evaluated using phase disposition (PD), alternate phase opposition disposition (APOD) and carrier overlapping (CO) sinusoidal pulse width modulation (SPWM) methods. The hybrid multilevel inverter has superior features over diode clamped multilevel inverters and is more efficient since the positive levels of the inverter that are generated  by high frequency switches (level generation part), are reversed by low frequency switches (polarity generation part) when the voltage polarity is required to be changed for negative polarity. Therefore, the overall cost and complexity of the hybrid inverter are greatly reduced particularly for higher inverter output voltage levels. Simulation is performed for three phase eleven level diode clamped multilevel inverter and hybrid multilevel inverter using MATLAB/Simulink for induction motor load and the total harmonic distortion is evaluated at different load torques.
Volume: 7
Issue: 3
Page: 251-263
Publish at: 2018-12-01

Design and Simulation Analysis of Three-Phase Transformer Less Grid-Connected PV Inverters

10.11591/ijape.v7.i3.pp211-226
Jayanna Kanchikere , A. K. Ghosh , Kalyankumar Kalyankumar
Three-stage transformer less inverter is broadly utilized as a part of low power photovoltaic (PV) framework associated frameworks because of its little size, high proficiency and ease. At the point when no transformer is utilized as a part of a framework associated photovoltaic (PV) framework, a galvanic association between the lattice and PV exhibit exists. In these conditions, perilous spillage streams (basic mode ebbs and flows) can show up through the stray capacitance between the PV cluster and the ground. The previous, keeping in mind the end goal to make a galvanic separation between the info and the yield incorporate a transformer (obligatory in a few nations) that restrains the entire framework exhibitions as far as effectiveness, weight, size and cost. Actually, transformer less inverters don't present any separation and are described by minimal size, bring down cost and higher effectiveness (over 2% higher). In any case, the absence of transformers prompts spillage streams that can be hurtful to the human body, and in addition for the entire transformation framework uprightness. With a specific end goal to keep away from the spillage streams, different Transformer less inverters have been proposed utilizing diverse topologies to create consistent regular mode voltage. In this paper, different as of late proposed transformer less PV inverters are researched. Their exhibitions are thought about and broke down.
Volume: 7
Issue: 3
Page: 211-226
Publish at: 2018-12-01

Implementation of Ultra-Modified Symmetric Sequence Algorithm for Space Vector Modulation of Matrix Converter

10.11591/ijape.v7.i3.pp264-276
Kotb B. Tawfiq , A. S. Mansour , E. E. EL-Kholy
This paper proposes an ultra- modified symmetric sequence algoritm of space vector modulation of matrix converter. The ultra-modified technique improves the drawbacks of the modified one where it provides a reduction of the total harmonic distortion for both output voltage and output current. Some of the advantages of matrix converter are introduced in this paper. These advantages represented in the output frequency of matrix converter which may be greater than input frequency, controlling rms value of the output voltage and the ability to control the input displacement factor.At the end of this paper simulation and experimental results are introduced which give a presice proof to the proposed algorithms.
Volume: 7
Issue: 3
Page: 264-276
Publish at: 2018-12-01

Effort Estimation in Traditional and Agile Mobile Application Development & Testing

10.11591/ijeecs.v12.i3.pp1265-1272
Anureet kaur , Kulwant Kaur
Smartphones/mobile devices are enduring all the aspects of human life. With the significant increase in demand for applications running on smartphones/mobile devices, developers and testers are anticipated to deliver high quality, on time and within budget applications. The estimation of development and testing provides a baseline and act as a tracking gear for stakeholders and developers. There are various approaches for estimation of traditional software development. But mobile applications are considered different from traditional software such as from those running on desktop, laptop or on the web. Many traditional estimation techniques used for these software are adapted to mobile domain. With agile software development (ASD) methodology, the scenario of development and estimation has changed drastically and so as mobile app development and estimation. This paper provides a Systematic Literature Review (SLR) on traditional estimation techniques and agile estimation techniques applied in mobile software/application. Also, effort attributes and accuracy parameters for estimation in mobile apps are presented. However, to date, there are very fewer studies done on the mobile application estimation domain using agile methodology.
Volume: 12
Issue: 3
Page: 1265-1272
Publish at: 2018-12-01

A Review on Various Sniffing Attacks and its Mitigation Techniques

10.11591/ijeecs.v12.i3.pp1117-1125
B. Prabadevi , N. Jeyanthi
Security in the era of digital computing plays a vital role. Of various attacks in the field of computing, Distributed Denial of service (DDoS) attacks, Man-in-the-Middle Attack (MITM) and data theft have their major impact on the emerging applications. The sniffing attacks, one of the most prominent reasons for DDoS attacks, are the major security threats in the client-server computing. The content or packet sniffer snorts the most sensitive information from the network and alters or disturbs the legitimate functionality of the victim system. Therefore it is extremely important to have a greater knowledge on these vulnerabilities, their issues, and various mitigation techniques. This study analyses the existing sniffing attacks, variations of sniffing attacks and prevention or detection mechanisms. The reasons for most vital Ransomware are also discussed.
Volume: 12
Issue: 3
Page: 1117-1125
Publish at: 2018-12-01

Towards Adaptive Sensor-cloud for Internet of Things

10.12928/telkomnika.v16i6.11557
I Made; Universitas Pelita Harapan Murwantara , Hendra; Universitas Pelita Harapan Tjahyadi , Pujianto; Universitas Pelita Harapan Yugopuspito , Arnold; Universitas Pelita Harapan Aribowo , Irene A.; Universitas Pelita Harapan Lazarusli
The emerge of the Internet of Things (IoT) data as a commodity to optimize public services such as Fishing Locator has made sensor-cloud an important object. When sensors that are members of multiple IoT gateways can inter-operate at the same time for more than one application, it will reduce cost to deploy IoT infrastructure. However, reliability has also developed as the most important aspect for real-time data collection that should be streamed constantly. Due to uncertainty factors sensors failure is potentially occurred, then an adaptive approach should be addressed into this as to guarantee the flow of streaming data. This paper proposed an adaptive sensor-cloud mechanism to manage the reliability by using a runtime model approach where a transition model and dynamic software product line engineering will take place to weaving the system. Our technique is comparable to other approaches and can be implemented in many types of Cloud-based services.
Volume: 16
Issue: 6
Page: 2771-2781
Publish at: 2018-12-01

An Opportunity for Values Education in Higher Education: Social Responsibility and Healthy Living Course

10.11591/ijere.v7i4.14768
Gökhan Izgar
The purpose of this study is to determine the contribution of the “social responsibility and healthy living” course, which was put into effect at a state university for the first time in Turkey, within the scope of elective courses on students’ acquisition of values. The data in this study, in which action research, one of the qualitative research designs, was conducted, were obtained using the semi-structured interview form prepared by the researcher. The data obtained were analyzed using the descriptive analysis and content analysis techniques, which are qualitative data analysis methods. 39 students participated in the study on a voluntary basis. As a result of the analysis of the data, it was concluded that the action plan developed within the scope of the social responsibility and healthy living course was effective in the acquisition of values of taking responsibility, charitableness, being useful, ethics, empathy, importance of the institution of family, cooperation-solidarity, patience, gratitude (thankfulness), freedom of thought and respect for differences. Likewise, some of the students stated that this course contributed to their views and behaviors concerning healthy living. However, a considerable number of students were of the opinion that either the course did not make a contribution or made a partial contribution. In addition, the students pointed out that the way the course was taught was fruitful and practice-based,, that it was fun and informative and that the projects and readings contributed to learning. Yet, there were also negative student views about the course content and the method of teaching employed. Moreover, it was important that a theme emerged indicating that class hours were not sufficient.
Volume: 7
Issue: 4
Page: 331-340
Publish at: 2018-12-01
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