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29,734 Article Results

Classification of Leaf Disease from Image Processing Technique

10.11591/ijeecs.v10.i1.pp191-200
Mahanijah Md Kamal , Ahmad Nor Ikhwan Masazhar , Farah Abdul Rahman
Disease in palm oil sector is one of the major concerns because it affects the production and economy losses to Malaysia. Diseases appear as spots on the leaf and if not treated on time, cause the growth of the palm oil tree. This work presents the use of digital image processing technique for classification oil palm leaf disease sympthoms. Chimaera and Anthracnose is the most common symtoms infected the oil palm leaf in nursery stage. Here, support vector machine (SVM) acts as a classifier where there are four stages involved. The stages are image acquisition, image enhancement, clustering and classification. The classification shows that SVM achieves accuracy of 97% for Chimaera and 95% for Anthracnose.
Volume: 10
Issue: 1
Page: 191-200
Publish at: 2018-04-01

Design and Fabrication of an Intelligent Walking Staff for Visually Impaired Subjects

10.11591/ijeecs.v10.i1.pp266-270
Rashidah Funke Olanrewaju , Muhammad Luqman Azzaki Mohd Radzi , Mariam Rehab , Fawwaz Eniola Fajingbesi
The joy we derive from our ability to commute and interact freely with the world as a result of our possession of sight with the naked eyes are enormous however the Visually impaired people find great difficulty in moving around freely without a human guide, especially in a new terrain. This research reports the design and fabrication process of an intelligent walking staff (iWalk) specially designed for the visually disabled individuals to argument their loss of sight, improve and ease their navigation. iWalk was designed around water and ultrasonic sensors to detect obstacles and water ahead. iWalk also has a wireless RF remote control buzzer for localization and detection in case it gets misplaced. The proposed system operability and efficiency was adequately tested using physical dataset composed of randomized locations with random obstacles and water. The proposed algorithm achieves an overall efficiency of 90% detection rate for water and ultrasonic sensor and 85.75% for the RF wireless remote control.
Volume: 10
Issue: 1
Page: 266-270
Publish at: 2018-04-01

Design of Hybrid Solar Wind Energy System in a Microgrid with MPPT Techniques

10.11591/ijece.v8i2.pp730-740
D. Chinnakullay Reddy , S. Satyanarayana , V. Ganesh
DC Microgrid is one feasible and effective solution to integrate renewable energy sources as well as to supply electricity. This paper proposes a DC microgrid with enhanced Maximum Power Point Tracking (MPPT) techniques for wind and solar energy systems. In this paper, the PV system power generation is enhanced by introducing a two-model MPPT technique that combines incremental conductance and constant voltage MPPT algorithms. Also, for the Wind Energy Conversion System (WECS) with pitch angle controlling technique, an Optimal Power Control MPPT technique is added. The Space Vector Pulse Width Modulation technique is introduced on grid side converter to improve the supply to the grid. The performance of proposed system is analyzed and the efficiency obtained with these methods is enhanced as compared with the previous methods.
Volume: 8
Issue: 2
Page: 730-740
Publish at: 2018-04-01

Information Hiding using LSB Technique based on Developed PSO Algorithm

10.11591/ijece.v8i2.pp1156-1168
Wisam Abed Shukur , Khalid Kadhim Jabbar
Generally, The sending process of secret information via the transmission channel or any carrier medium is not secured. For this reason, the techniques of information hiding are needed. Therefore, steganography must take place before transmission. To embed a secret message at optimal positions of the cover image under spatial domain, using the developed particle swarm optimization algorithm (Dev.-PSO) to do that purpose in this paper based on Least Significant Bits (LSB) using LSB substitution. The main aim of (Dev. -PSO) algorithm is determining an optimal paths to reach a required goals in the specified search space based on disposal of them, using (Dev.-PSO) algorithm produces the paths of a required goals with most efficient and speed. An agents population is used in determining process of a required goals at search space for solving of problem. The (Dev.-PSO) algorithm is applied to different images; the number of an image which used in the experiments in this paper is three. For all used images, the Peak Signal to Noise Ratio (PSNR) value is computed. Finally, the PSNR value of the stego-A that obtained from blue sub-band colo is equal (44.87) dB, while the stego-B is equal (44.45) dB, and the PSNR value for the stego-C is (43.97)dB, while the vlue of MSE that obtained from the same color sub-bans is (0.00989), stego-B equal to (0.01869), and stego-C is (0.02041). Furthermore, our proposed method has ability to survive the quality for the stego image befor and after hiding stage or under intended attack that used in the existing paper such as Gaussian noise, and salt & pepper noise.
Volume: 8
Issue: 2
Page: 1156-1168
Publish at: 2018-04-01

Low-Power D-Band CMOS Amplifier for Ultrahigh-Speed Wireless Communications

10.11591/ijece.v8i2.pp933-938
Tuan Anh Vu , Kyoya Takano , Minoru Fujishima
This paper presents a low-power D-Band amplifier suitable for ultrahigh-speed wireless communications. The three-stage fully differential amplifier with capacitive neutralization is fabricated in 40 nm CMOS provided by TSMC. Measurement results show that the D-band amplifier obtains a peak gain of 9.6 dB over a -3 dB bandwidth from 138 GHz to 164.5 GHz. It exhibits an output 1 dB compression point (OP1dB) of 1.5 dbm at the center frequency of 150 GHz. The amplifier consumes a low power of 27.3 mW from a 0.7 V supply voltage while its core occupies a chip area of 0.06 mm2.
Volume: 8
Issue: 2
Page: 933-938
Publish at: 2018-04-01

Analytic Estimation of Two-Dimensional Electron Gas Density and Current-Voltage Characteristic in AlGaN/GaN HEMT’s

10.11591/ijece.v8i2.pp954-962
Asmae Babaya , Bri Seddik , Saadi Adil
This paper is mainly dedicated to understand the phenomena governing the formation of two-dimensional electron gas (2DEG) confined in the quantum well which hold the role of the channel in the high electron density transistors (HEMT) based on AlGaN / GaN heterojunction. The theory takes into account: the crystal structure, the spontaneous and piezoelectric polarization concept, the formation mechanism of two-dimensional electron gas at the AlGaN / GaN interface, the approximate resolution of the Poisson and Schrödinger equations to determine the density of Two-dimensional electron gas after the analytical formula of the current-voltage characteristic is established. Our study is also concerned with the dependence of the two-dimensional electron gas density on the following technological parameters: Aluminum molare fraction, AlGaN layer thickness and AlGaN layer doping, In order to control the influence of these parameters on the device performance. Finally, the current-voltage characteristic which reflects the variation of the drain-source current as a function of the modulation of the gate voltage has been discussed.
Volume: 8
Issue: 2
Page: 954-962
Publish at: 2018-04-01

From Agasa Cristie to Group Image Play-Analysis of Horror Survival Game Panic Room : Escaping from the Den on Emotional Elements Development

10.11591/ijece.v8i2.pp644-650
Doo Heon Song , Hae Kyung Rhee , Ji-eun Kim , Jong Hee Lee
A maniac computer game genre called "Survival Horror Games‟ is aimed for making gamers feel cathartic feeling when they escaped from the designed horror successfully. The degree of gaming quality, however, is not easy to measure. In this paper, we apply Caillois‟ game playing categories and other standards to measure how a game induces the feeling of fear and other emotional experience to players. Once dominated horror survival game series called Panic Room: Escaping from the Den was chosen to analyze and evaluate with those standards as well as its narratives and subsystems. Especially the 2nd version was most welcomed to users among 4 versions thus we focused on the difference between the version 1 and the version 2 in terms of game playing and fear elements in the game content and story structure. In result, version 2 showed much more Agon and Mimicry and all other fear elements than version 1. The group image playing structure and conference/collection subsystem that were newly provided to version 2 were attributed to its success.
Volume: 8
Issue: 2
Page: 644-650
Publish at: 2018-04-01

Evaluation and Analysis of Rate Control Methods for H.264/AVC and MPEG-4 Video Codec

10.11591/ijece.v8i2.pp1273-1280
Imran Ullah Khan , M. A. Ansari , S. Hasan Saeed , Kakul Khan
Audio, image and video signals produce a vast amount of data. The only solution of this problem is to compress data before storage and transmission. In general there is the three crucial terms as, Bit Rate Reduction, Fast Data Transfer and Reduction in Storage. Rate control is a vigorous factor in video coding. In video communications, rate control must ensure the coded bitstream can be transmitted effectively and make full use of the narrow bandwidth. There are various test models usually suggested by a standard during the development of video codes models in order to video coding which should be suffienciently be efficient based on H.264 at very low bit rate. These models are Test Model Number 5 (TMN5), Test Model Number 8 for H.263, and Verification Model 8 (VM8) for MPEG-4 and H.264 etc. In this work, Rate control analysis for H.264, MPEG-4 performed. For Rate control analysis test model verification model version 8.0 is adopted.
Volume: 8
Issue: 2
Page: 1273-1280
Publish at: 2018-04-01

Performance Evaluation of Multichannel Audio Compression

10.11591/ijeecs.v10.i1.pp146-153
Teddy Surya Gunawan , Mira Kartiwi
In recent years, multichannel audio systems are widely used in modern sound devices as it can provide more realistic and engaging experience to the listener. This paper focuses on the performance evaluation of three lossy, i.e. AAC, Ogg Vorbis, and Opus, and three lossless compression, i.e. FLAC, TrueAudio, and WavPack, for multichannel audio signals, including stereo, 5.1 and 7.1 channels. Experiments were conducted on the same three audio files but with different channel configurations. The performance of each encoder was evaluated based on its encoding time (averaged over 100 times), data reduction, and audio quality. Usually, there is always a trade-off between the three metrics. To simplify the evaluation, a new integrated performance metric was proposed that combines all the three performance metrics. Using the new measure, FLAC was found to be the best lossless compression, while Ogg Vorbis and Opus were found to be the best for lossy compression depends on the channel configuration. This result could be used in determining the proper audio format for multichannel audio systems.
Volume: 10
Issue: 1
Page: 146-153
Publish at: 2018-04-01

Incursion Recognition Mechanism Based on Secure Network System

10.11591/ijeecs.v9.i3.pp543-545
A. Mohamed Divan Masood , S. K. Muthusundar
Internet based computing dissimilar services such as server storage and applications are shared on the internet. This makes cloud computing one of the most promising and rapidly growing technologies. As it relies on sharing computer resources, it is prone to various security risks. Individual such security issue is Distributed Denial of Services attack on cloud. A DDos assault can begin from anyplace in the system and normally overpowers the casualty server by sending countless. This paper deals with the prevention of DDos attacks and how honey pot approach can be used in cloud computing to counter DDos attacks.
Volume: 9
Issue: 3
Page: 543-545
Publish at: 2018-03-01

A Novel Control Strategy for Compensation of Voltage Quality Problem in AC Drives

10.11591/ijpeds.v9.i1.pp8-16
Syed Suraya , P. Sujatha Sujatha , Bharat Kumar P
This paper presents a novel control strategy for the compensation of voltage quality issues in power system networks with AC drives. Voltage quality is one of the key parameter for power engineers and to deliver the power with good quality should be given at most priority. Voltage quality mitigation in power system network is done by employing dynamic voltage restorer (DVR). DVR consists of power switches and power switches are to be controlled. DVR in this paper is controlled using a novel control strategy. A novel control strategy can effectively control DVR by improving voltage quality reducing the adverse effects of voltage sag and voltage swell in power system networks. The paper presents the DVR controlled with novel control strategy for electrical machine (induction motor) drive load application.
Volume: 9
Issue: 1
Page: 8-16
Publish at: 2018-03-01

The Dimensioning of a Compressed Air Motor Dedicated to a Compressed Air Storage System

10.11591/ijpeds.v9.i1.pp73-79
Ilham Rais , Hassane Mahmoudi
Storage represents the key to the penetration of renewable energies especially wind and solar energy on the network electric. It avoids unloading in the event of overproduction, ensuring real-time The production-consumption balance and also improve the robustness of the electricity grid. CAES (Compressed Air Energy Storage) is a mature technology that allows to store long or short duration an amount of energy sucient to support the number of cycles requested. The E-PV-CAES system will be presented and the modeling of the compressed air engine will also be treated in more detail in this article.
Volume: 9
Issue: 1
Page: 73-79
Publish at: 2018-03-01

Computational Morphological Analysis of Yorùbá Language Words

10.11591/ijai.v7.i1.pp11-18
Safiriyu Ijiyemi Eludiora , O R Ayemonisan
Nigeria official languages are English, Yorùbá, Igbo and Hausa. The focus of the study reported in this paper is to develop learning tool that can assist learners to learn the Yorùbá language using its alphabets. The study is critical to Yorùbá language, because of its endangerment. There is need to introduce different learning tools that can mitigate its extinction. A Yorùbá word perfect system was developed to assist people in learning the Yorùbá language. English and Yorùbá words formation are experimented using computational morphological approach (word formation). The theoretical framework considered Finite state automata (FSA) to realise different ways of combining the consonants and vowels to form word. Two to five letter words were considered. The system was designed and implemented using UML tools and python programming language.The system will teach the users on how the words are formed, and the number of syllables in each word. The user  need not to know how to tone mark word before he/she can use the system. Any word typed will be analysed according to its number of syllables. This approach produces representatives of all parts of speech (POS) of the two languages. It produces corpora for the two languages
Volume: 7
Issue: 1
Page: 11-18
Publish at: 2018-03-01

A Commercial Low Cost, Highly Efficient UC3842 based High Brightness LED (HBLED) Lamp

10.11591/ijpeds.v9.i1.pp1-7
Devi Maheswaran , Sreedevi V T
The conventional lighting sources like incandescent and fluorescent lamps are replaced by High Brightness Light Emitting Diodes (HB-LEDs). In this paper, a HBLED driver using a Single Ended Primary Inductor Converter (SEPIC) with input Power Factor Correction (PFC) is presented.  PFC is accomplished using a commercial inexpensive Peak Current Mode Controller (PCMC) IC UC3842 is newly combined with SEPIC converter. Extensive simulation results are carried out and a laboratory prototype to power 18W LED array from AC mains is implemented and the results are presented in detail.
Volume: 9
Issue: 1
Page: 1-7
Publish at: 2018-03-01

Small-signal AC model and closed loop control of interleaved three-phase boost converter

10.11591/ijpeds.v9.i1.pp240-251
H.V.Gururaja Rao , Karuna Mudliyar , R.C. Mala
Renewable energy sources are increasingly being used today and solar energy is the most readily and abundantly available energy source. Boost converters are an integral part of any solar energy system. In order to obtain maximum possible energy from the solar system multi-phase interleaved boost converters are used. This paper presents the small-signal ac modelling and closed loop control of three-phase interleaved boost converter. State–space modelling methodology has been adopted to have linearized equivalent model of the boost converter. The interleaved three-phase boost converter is averaged over its one switching period and perturbed with small ac variations and finally linearized around its quiescent point to have a small signal ac model. Type III compensator is employed to improve the frequency response and closed loop control of three-phase boost converter. The controller design procedure is discussed in detail. The effect of right-half plane zero in non-minimum phase system and the appropriate pole-zero placements to overcome the maximum phase lag in such system is discussed. The compensated closed loop system is tested for load variations to observe the transient response.
Volume: 9
Issue: 1
Page: 240-251
Publish at: 2018-03-01
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