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Journal receives papers in continuous flow and we will consider articles from a wide range of Information Technology disciplines encompassing the most basic research to the most innovative technologies. Please submit your papers electronically to our submission system at http://jatit.org/submit_paper.php in an MSWord, Pdf or compatible format so that they may be evaluated for publication in the upcoming issue. This journal uses a blinded review process; please remember to include all your personal identifiable information in the manuscript before submitting it for review, we will edit the necessary information at our side. Submissions to JATIT should be full research / review papers (properly indicated below main title).

Journal of Theoretical and Applied Information Technology
December 2013 | Vol. 58 No.2

Title:	SIMULATION OF MPC BASED SPEED CONTROL OF PERMANENT MAGNET SYNCHRONOUS MOTOR DRIVE
Author:	S.SIVARANJANI, Dr.R.RAJESWARI
Abstract:	This paper describes the implementation of an optimal control strategy used for speed control of Permanent Magnet Synchronous Motor (PMSM) drive. Since several decades Power Electronics and Drives deals with cascaded control, which provides easy implementation and robust in operation. A serious drawback of requiring fast operating inner loop looks forward a strong candidate to eliminate the drawback. The Model Predictive Controller cost function enables a simple, flexible and improved performance controller for the drive. The basic concepts, operating principles, control diagrams, and results are used to provide a comparison between the different control strategies. Several key aspects related to this methodology are, in depth, presented and compared with conventional control technique. The performance of the motor drive with the proposed controller results is found to be prominent.
Keywords:	Speed Control, PMSM, MPC, PWM Inverter
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	CASCADED H-BRIDGE THREE-PHASE MULTILEVEL INVERTERS CONTROLLED BY MULTI-CARRIER SPWM DEDICATED TO PV
Author:	ABDELAZIZ FRI, RACHID EL BACHTIRI, ABDELAZIZ EL GHZIZAL
Abstract:	Generally, electrics devices need alternating current. But PV generators provide direct current. So, it is necessary to use inverters. Multilevel inverters seem very suitable for this task. In this paper, we present a comparative study between three multilevel inverters: 3 levels, 5 levels and 15 levels. These inverters have the same topology and are controlled by the same law: Sinusoidal Pulse Width Modulation multi-carrier (SPWM). Our interest concerns the magnitude and the quality of generated voltage. The 15L multilevel inverter supplied by 36V PV gives a 230V AC voltage. So it’s the most suitable for supplying normal electric equipments. Simulation with Matlab/Simulink of the inverters operation shows that: THD is independent of the value of PV voltage; the greater the number of levels is, the less THD becomes.
Keywords:	Three-Phase Multilevel inverters, H-Bridge, SPWM Multi-Carrier, THD.
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	BIOMETRIC BASED STRONG REMOTE USER AUTHENTICATION USING SMART CARD
Author:	S.RAMESH, DR.V.MURALI BHASKARAN
Abstract:	Remote user authentication is one of the major issues in the rapid growing internet era. In this paper we propose a biometric based remote user authentication scheme using smart cards. The existing methods failed to be safe in remote user authentication as the secret values in either end of the communication could be guessed by the intruder. In our scheme we introduce an addition security at the user side as an extra nonce by which the intruders will be unable to guess the users secret data. Hence our proposed scheme proves to provide a strong authentication and non-repudiation even in an insecure communication by sending and receiving messages with timestamps.
Keywords:	Biometrics, Smart card, Cryptography, Authentication, Security
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	THE MIGRATION OF DATA FROM A RELATIONAL DATABASE (RDB) TO AN OBJECT RELATIONAL (ORDB) DATABASE
Author:	MOHAMED BAHAJ, ALAE ELALAMI
Abstract:	The present article deals with the passage of migrating data from a relational database to an object relational database, by developing methods of selection and insertion which is based on optimizing the extraction of information in a predefined data model, which deals with the transition from relational to object relational, which fits to any situation processing . The migration handles the majority of the object concept including inheritance. The transition of migration is done in an automatic way, without the interference of the human factor, a prototype is already created that proves the effectiveness of this approach.
Keywords:	Data Migration, RDB, ORDB, Prototype, Automation
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	A NOVEL EFFICIENT DISCRIMINANT COMPONENT ANALYSIS ALGORITHM FOR FACE RECOGNITION
Author:	R.RAJALAKSHMI, DR.M.K.JEYAKUMAR
Abstract:	Face recognition is the process of categorizing a person in an image by evaluating with a known face image library. The pose and illumination variations are two main practical confronts for an automatic face recognition system. This paper proposes a novel face recognition algorithm known as EDCA for face recognition under varying poses and illumination conditions. The main aim of this paper is to reduce the feature vector size. The intensity of a face image is normalized to get an illumination normalized image. This EDCA algorithm overcomes the high dimensionality problem in the feature space by extracting features from the low dimensional frequency band of the image. It combines the features of both LDA and PCA algorithms. The experiments were performed on both the Extended Yale B datasets. The experimental results show that the proposed algorithm produces a higher recognition rate than the existing LDA and PCA based face recognition techniques.
Keywords:	Face Recognition, Histogram Equalization, LDA And PCA
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	A NEW CORNER DETECTION METHOD FOR OMNIDIRECTIONAL IMAGES
Author:	OMAR EL KADMIRI, LHOUSSAINE MASMOUDI
Abstract:	Recently, many robotic applications adopted omnidirectional vision sensors. The achievement of those applications is usually based on computer vision algorithms by means of visual indices extraction from the acquired images, such as edge, region, and interest points detection. The use of classical image processing algorithms for omnidirectional images proved its limitations. Some new methods which take into account the special geometrical properties of omnidirectional images have been developed and used with success. Along these lines, this paper proposes a new corner detector more adequate for this class of images. The method is based on a virtual spherical electrostatic model for edge detection and the standard Harris corner detector. Experimental results and quantitative assessments affirm the performance of the proposed approach against several image degradations. Confrontation to other classical methods is provided.
Keywords:	Omnidirectional Vision, Corner Detection, Virtual Electrostatic Model, Harris Corner Detector, Visual Servoing
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	MEMORY LESS Z PATH ELIMINATED VERY LOW POWER CORDIC BASED FFT PROCESSOR
Author:	A. YASODAI, Dr.A.V.RAMPRASAD
Abstract:	A complex number can be interpreted as a vector in imaginary plane. The vector rotation in the x/y plane can be realized by rotating a vector through a series of elementary angles. These elementary angles are chosen such that the vector rotation through each of them may be approximated easily with a simple shift and add operation, and their algebraic sum approaches the required rotation angle .This can be exercised by CORDIC algorithm in rotation mode. In this paper, we have proposed a pipelined architecture by pre computation of direction of rotation , radix-4 number representation, and the angle generator which has been processed in terms of hardware complexity , iteration delay and memory reduction. This CORDIC algorithm is implemented using signed digit arithmetic for the efficient implementation of rotational radix-4 CORDIC algorithm, eliminating z-path completely. Comparison of the proposed architecture with the available radix-2 and conventional radix-4 architectures is elaborated. The proposed algorithm also exercises an addressing scheme and the associated angle generator logic in order to eliminate the ROM usage for bottling the twiddle factors. The approached architecture for radix-4, 16-bit precision and N-point FFT was implemented on FPGA platform virtex 4 and is simulated and synthesized to validate the results (Xilinx ise 10.2.i). This contributes in the minimization of the dynamic power consumption of the proposed system to 28.52mW at 100MHz and 5.70mW at 20MHz for 16 point radix 4 FFT.
Keywords:	CORDIC, memory less systems, FPGA, latency, Radix-4, speed, throughput, twiddle factor., FFT
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	IDENTIFICATION OF INRUSH CURRENT AND INTERNAL FAULT CURRENTS IN A TRANSFORMER USING SELF ORGANIZING MAPS
Author:	L.UMASANKAR, N.KALAIARASI
Abstract:	Differential protection of a transformer is used in protecting the transformer windings against internal faults based on the simple property that the ratio of currents entering and leaving the transformer is equal to the inverse of the transformation ratio. This ratio is affected by either internal faults or inrush currents during transformer magnetization. In order to avoid mis-operation of a transformer differential protection relay due to inrush current, a distinction must be made between the inrush current and internal fault currents. This paper aims at using Self Organizing Maps to distinguish between the currents without delving into the particular differences in the properties of the 2 currents.
Keywords:	Inrush Currents, Internal Fault, Self Organizing Maps, Transformers, Kohonen Map
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	COMPUTATIONAL PROBLEM SOLVING ARCHITECTURAL DESIGN BASED ON MULTI - AGENT
Author:	MARYAM RAJABI, TEH NORANIS MOHD ARIS, MD. NASIR SULAIMAN
Abstract:	The application of problem solving methods is seemed to be difficult for novice students in computer programming field. Hence, majority of them prefer to go straight to the last stage to collect information by analyzing source code. Indeed, introducing an efficient solution for this problem will help them to figure out programming problems properly as well as saving time. Nevertheless, computational problem solving systems are not as applicable as enough to be contributed to complex problems craving intelligent analysis. So, intelligent agents tie with problem solving methods to conquer the mentioned issue. Here, a new system mapped by prometheus design tool (PDT) has been introduced. Likewise, the textualized problem to be given to the system and then problem analysis chart (PAC), input process output (IPO) chart, flowchart and algorithm will be produced. The designed problem solving system in this work comprises five agents, namely GUI, PAC, IPO, flowchart and algorithm agents interacting with the environment by percepts and actions. Additionally, there exists extraction, transformation and module number generation processes covering with three scenarios: ‘Extract Scenario, ‘Transform Scenario’ and ‘Generate Module Number Scenario’. The system specification, the architectural design and the detailed design are produced based on the analysis overview diagram and the scenario diagram.
Keywords:	Computational problem solving, Problem solving method, Intelligent Agents, Prometheus design tool (PDT)
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	FULL ON-CHIP CMOS LOW DROPOUT VOLTAGE REGULATOR WITH -41 dB AT 1 MHZ FOR WIRELESS APPLICATIONS
Author:	ZARED KAMAL, QJIDAA HASSAN, ZOUAK MOHCINE
Abstract:	A high PSRR full on-chip and area efficient low dropout voltage regulator (LDO), exploiting the nested miller compensation technique with active capacitor (NMCAC) to eliminate the external capacitor and improve the high performance. A novel technique is used to boost the important characteristic for wireless applications regulators PSRR. The idea is applied to stabilize the Low dropout regulator. The proposed regulator LDO works with a supply voltage as low as 1.8 V and provides a load current of 50 mA with a dropout voltage of 200 mV, the PSR of LDO is -60 dB at a frequency of 60 KHz and -41dB at a frequency of 1 MHz. It is designed in 0.18 µm CMOS technology and the active area on chip measures 0.043 mm2.
Keywords:	Low Dropout Regulator (LDO); MOSCAP; NMCAC; Active Feedback; High PSR; System On Chip
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	SOMA METHOD IN MODELING BUSINESS PROCESS AUTOMATION OF THESIS PROPOSAL SUBMISSIONS (CASE STUDY: SWCU – PSYCHOLOGY FACULTY)
Author:	MELDA MANUHUTU, EKO SEDIYONO, WIRANTO HERRY UTOMO
Abstract:	SOA is a framework that integrates business processes and supports IT infrastructure, so it becomes possible to integrate between several Information Systems in an organization, especially in tertiary educational institutions. The goal of this research is to analyze and devise business process automation checking the completeness of proposal submissions using Service Oriented Modeling Architecture (SOMA) in the Psychology Faculty of Satya Wacana Christian University, Salatiga, as well as compare the business processes of checking the completeness of thesis proposal submissions before and after being integrated. From here, the advantages will be found from the services that are implemented in the completion checking system of thesis proposal submissions. When the system has been integrated, it can help in the thesis proposal management process, so that it can facilitate all related parties.
Keywords:	SOA, SOMA, Information systems, Integration
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	A COMPARATIVE STUDY OF MPPT TECHNICAL BASED ON FUZZY LOGIC AND PERTURB OBSERVE ALGORITHMS FOR PHOTOVOLTAIC SYSTEMS
Author:	R. EL GOURI, M. BEN BRAHIM, L. HLOU
Abstract:	Maximum power point trackers (MPPT) play an important role in photovoltaic (PV) power systems because they maximize the power output from a PV system for a given set of conditions, and therefore maximize the array efficiency. The maximum power point tracking methods proposed in this study are two algorithms: Perturb and Observe (P&O) and Fuzzy Logic Control (FLC). The numerical modeling of the PV system shows the MPPT interest and then the MPPT algorithms are highlighted. In this paper, a PV system based on a boost converter as MPPT device is considered. The proposed algorithms were simulated in Matlab/Simulink environment for comparing the performances of P&O and fuzzy logic MPPT methods.
Keywords:	MPPT, Fuzzy Logic, Hill Climping, Solar Panel
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	FLOW-BASED CONCEPTUAL REPRESENTATION OF PROBLEMS
Author:	SABAH AL-FEDAGHI
Abstract:	Well-structured problem-solving involves a stage of (external) representation of the problem to provide a structure that serves as a shareable object of thought for studying the behavior of the underlying system. A dominant problem-solving methodology involves state-based representation with an initial state, a goal state, and a set of transactions. In addition, object-oriented methodology and Unified Modeling Language (UML) are increasingly utilized for drawing descriptions of a problem space. Petri nets attract designers (e.g., software) with its formal depictions modeling the behavior of a system. Nevertheless, each of these methodologies of problem representation has its own weaknesses, especially with regard to incorporating the features of understandability and simplicity. This paper proposes a different flow-based representation that has advantages for describing certain types of problems. The resultant description is characterized by uniform application of the basic structure of a flow system. The new methodology is demonstrated through sample toy problems, such as the problem of the dining professors.
Keywords:	Conceptual Model, Dinning Philosophers, Problem Representation, Problem Solving, State-Based Representation, System Behavior, UML
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	SURVEY OF SIP AUTHENTICATION MECHANISMS
Author:	HANANE BELAOUD, JAMAL EL ABBADI , AHMED HABBANI
Abstract:	In recent years Voice over Internet Protocol (VoIP) has become a popular NGN (Next Generation Network) technology. As this technology is built on internet protocol it is affected by a critical security problems . The Session Initiation Protocol (SIP) is considered as the most used signaling protocol for calls over the Internet for establishing, maintaining and terminating VoIP calls. The security of SIP is becoming more and more important. The prime security service required by SIP is authentication. This paper focuses on the SIP security mechanisms of authentication. We survey the newly proposed methods of authentication then we proceed to evaluate these methods in view of security efficiency and computational cost.
Keywords:	NGN, VOIP, SIP, Authentication
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	ADAPTIVE TEACHING AND LEARNING USING ONTOLOGY
Author:	T. PAKIR MOITHEEN, DR. P. SHEIK ABDUL KHADER
Abstract:	The emergence of World Wide Web has provided more electronic resources to the learners in the e-learning field. The users are overloaded with electronic resources for a specific topic or domain. This research proposes a tool using ontology to evaluate the e-content and make the content adaptive to the need of the learner by generating concept maps for the electronic content. The tool also identifies the strength and weakness of the e-content by comparing with expert ontology. The tool is effectively used to personalize the content based on the knowledge level of the learner. The tool generated concept maps are 60% in accordance with expert ontology.
Keywords:	Adaptive Learning, E-Learning, Ontology And Personalization
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	ENERGY EFFICIENT DOUBLE CLUSTER HEAD SELECTION ALGORITHM FOR WSN
Author:	D. SURESH, Dr. K. SELVAKUMAR
Abstract:	In wireless sensor networks (WSN), the current cluster based routing techniques may result in increased network workload, energy consumption and re-transmissions. In order to overcome these issues, in this paper, we propose an energy efficient double cluster head selection algorithm for wireless sensor network. In this technique, two cluster heads namely main and sub-ordinate cluster heads are selected based on the parameters such as residual energy, minimum average distance from the member, nodes timer and node degree using particle swarm optimization technique. In this technique, each cluster member node sends the data to main cluster head. The aggregated data from the main cluster head is transmitted to sink through sub-ordinate cluster head. An energy efficient routing protocol is also developed based on the parameters expected number of retransmissions and link failure probability. By simulation results, we show that the proposed technique enhances the network lifetime and reduces the network overload.
Keywords:	WSN, Cluster Based Routing, Energy Efficient, Algorithm
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	LINK-UTILITY-BASED IMPROVED BACKOFF COOPERATIVE MAC PROTOCOL WITH FAIR SCHEDULING FOR MANET
Author:	R.MANIKANDAN, Dr.K.SELVAKUMAR
Abstract:	In this paper, we propose a Link-Utility-Based Improved Backoff Cooperative MAC Protocol for MANET with fair scheduling algorithm. In this fair scheduling algorithm, a priority queue is used to fairly allocate the resources. The priority queue consists of number of slots allocated for each flow, optimal transmission rate of flow and optimal transmission power of flow. We implement the new improved link-utility function that uses the optimal transmission rate and optimal transmission power.After getting the input priority queue, the fair scheduling algorithm is applied. This fair scheduling algorithm thus fairly allocates the resources to the nodes. Simulation results show that the proposed algorithm improves the throughput and fairness of the flows.
Keywords:	Link Utitlity, Scheduling, MANET, MAC Simulation
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	GENERATION OF A NEW HYBRID SUBCARRIER MULTIPLEXING–SAC-OCDMA SYSTEM BASED ON FSO
Author:	HUSSEIN SAAD MOHAMMED, S. A. ALJUNID, HILAL A. FADHIL, THANAA HUSSEIN ABD, RASHID A. FAYADH, A. K RAHMAN
Abstract:	This paper proposes hybrid Subcarrier Multiplying-Spectral Amplitude Coding-Optical Code Division Multiple Access system (SCM-SAC-OCDMA) based on the Free Space Optic (FSO) using Multi Diagonal (MD) code is. The proposed hybrid system is used to evaluate the contribution of different haze conditions of Malaysia as a tropical weather country as well as evaluating the effects of different noise types such as shot noise, thermal noise and Inter-Modulation distortion. This system has been evaluated numerically and by simulation analysis. The results of the simulation analysis that the proposed system can transmit 1 Gb/s for 2.5 km for heavy haze under the transmission power of 6dBm at BER 10-10.
Keywords:	Subcarrier Multiplexing (SCM), SAC-OCDMA, Multi Diagonal (MD) code, Radio Frequency (RF), specific haze attenuation (αspec).
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	ANALYSIS OF RADIAL DISTRIBUTION SYSTEM OPTIMIZATION WITH FACTS DEVICES USING HYBRID HEURISTIC TECHNIQUE
Author:	S.VIJAYABASKAR, T.MANIGANDAN
Abstract:	Distribution networks transport electric energy to the end user from distribution substations. Power utilities are looking for improved power delivery performance. The performance of the delivery system is measured by the power loss of the system. The increase in power loss increases the operating cost of the distribution system. This paper presents an algorithm to minimizing the power loss of the distribution system. Self Adaptive Hybrid Differential Evolution (SaHDE) technique combined with sensitivity factors has been practiced to find the optimal location and the size of FACTS devices to reduce the operating cost of Radial Distribution System (RDS). The locations of the FACTS devices are located by the sensitivity factors. The amount of reactive power component generation/absorption by the FACTS devices at the identified locations has been calculated through SaHDE. The effectiveness of the proposed technique is validated through 10-bus, 34-bus and 85-bus radial distribution systems.
Keywords:	Distribution Systems, FACTS, Loss Reduction, Loss Sensitivity Factors, SaHDE
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	CONGESTION MANAGEMENT USING HYBRID FISH BEE OPTIMIZATION
Author:	S. THANGALAKSHMI, P. VALSALAL
Abstract:	Congestion management is a task performed by Independent System Operator (ISO) to ensure the operation of transmission system within limits. In an emerging electric power market, congestion management is highly important and inefficient management can be a barrier to electricity trading. To minimize congestion, it is required to maximize transmission line generation and decrease its cost. A Hybrid Fish Bee Swarm Optimization based algorithm to manage congestion is proposed to achieve this objective. The Fish Bee Swarm Optimization is based on two algorithms namely Artificial Bee Colony (ABC) and Fish School Search (FSS) methods. The proposed algorithm is validated on an IEEE 30 bus system. Results show the performance of the proposed optimization technique decreases congestion.
Keywords:	Congestion Management, Hybrid optimization, Artificial Bee Colony (ABC), Fish School Search (FSS)
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	A REVIEW OF RESOURCE ALLOCATION TECHNIQUES FOR THROUGHPUT MAXIMIZATION IN DOWNLINK LTE
Author:	M.A. GADAM, L. MAIJAMA’A, I.H. USMAN
Abstract:	Long Term Evolution (LTE), by third generation project partnership (3GPP) is one of the radio access technologies used for delivering broadband mobile services. It is mainly influenced by high data rates, minimum delay and the capacity due to scalable bandwidth and its flexibility. The downlink LTE employs orthogonal frequency division multiple access (OFDMA) as a multiple access technique. The conventional resource allocation method in OFDMA employed different modulation and coding scheme (MCS) on allocated subcarriers to achieve good throughput. But, in the downlink LTE, all scheduling blocks at a given transmission time interval (TTI) to user must adopt same MCS and these brings about constraints in the system and as a result degrade system performance. This paper reviewed several resource allocation schemes for throughput maximization in LTE downlink. In each of the schemes considered, the sub-optimal solution shows a significant performance improvement compared to the optimal solution. A quality of service (QoS) guaranteed RB allocation achieves high throughput compared to other schemes considered in this article.
Keywords:	Scheduling Blocks, Throughput, Resource allocation, Harmonic Mean, Modulation
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	NOVEL HARMONIC ELIMINATION TECHNIQUE FOR CASCADED H-BRIDGE INVERTER USING SAMPLED REFERENCE FRAME
Author:	VEERAKUMAR,NIRMAL KUMAR , SATHISHKUMAR, RAJESH
Abstract:	This paper proposes SWARM Intelligence based algorithm for selective harmonic elimination using SSVPWM in modified H-bridge multilevel inverter. This algorithm uses sampled reference frame to generate reference sine signal. The computation time is less as compared to that of sector identification algorithms. Also, SWARM intelligence based algorithm doesn’t require any look-up table potentiometer connected to ADC channel of this dsPIC which decides the V/F ratio and the keypad connected to PORT C which decides the harmonic order that has to be eliminated. The hardware setup for the proposed method for 5-level inverter has been developed successfully for 2.2Kw Induction motor. The experimental result shows that this method can effectively reduce the selective harmonic in modified cascaded H-Bridge Multilevel inverter.
Keywords:	Swarm Space Vector Pulse Width Modulation (SSVPWM), Artificial Neuro Fuzzy Inference System (ANFIS), Selective Harmonic Mitigation Pulse Width Modulation (SMHPWM), Selective Harmonic Pulse Width Modulation (SHPWM), Total Harmonic Distortion (THD), Fast Fourier Transform (FFT),Interrupt Service Subroutine (ISR).
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	SOUTH INDIAN TAMIL LANGUAGE HANDWRITTEN DOCUMENT TEXT LINE SEGMENTATION TECHNIQUE WITH AID OF SLIDING WINDOW AND SKEWING OPERATIONS
Author:	SUNANDA DIXIT, Dr.H.N.SURESH
Abstract:	In document image analysis, Text line segmentation is one of the key components. The segmentation logic presents essential information about skew correction, zone segmentation, and character recognition. The method of document image segmentation into text lines for printed text has seen numerous contributions from fellow research scholars, yet there is scope for tremendous improvement. The key challenges for handwritten document are due to writer movement, the inter-line distance changeability and incoherent distance between the components that may differ. These may be directly by segments, or curved. The area of handwritten segmentation has seen few models; very few of the research paper are proposed for Text line skew segmentation model and hence the stimulus of handwritten south Indian languages. Consequently, a better text line segmentation technique for south Indian Tamil language is proposed in this paper. The processing of Tamil language is very crucial factor because the Tamil letters are in crucial shapes and it is harder to segment the touching lines and letters from the Tamil image documents. The challenges present in Tamil language process and the existing text line segmentation methods has been improved by our proposed method, which utilizing two major techniques namely, sliding window and adaptive histogram equalization. Our proposed text line segmentation technique initially performs the preprocessing process and these preprocessed document images are given to the adaptive histogram equalization. During the histogram equalization process, the document images text characters are enhanced to view the characters more accurately. The enhanced image text lines are segmented by utilizing the sliding window operation. For accurate line segmentation, the skewing operation is performed on the line segmented result images. The implementation result shows the effectiveness of proposed technique, in segmenting the handwritten text lines from the input document. The performance of the proposed technique is evaluated by comparing the result of proposed technique with the conventional text line segmentation technique. The result shows that our proposed technique acquires high-quality text line segmentation DR, RA and F-Measure values for the number of testing documents in comparison with the conventional technique.
Keywords:	Line Segmentation, Sliding Window, Optical Character Segmentation, Adaptive Histogram, Skewing
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	MANET ROUTING: OPTIMIZATION BY GENETIC AND FUZZY LOGIC APPROACH
Author:	N.K. KUPPUCHAMY R.MANIMEGALAI
Abstract:	Mobile Ad hoc network is a collection of self configurable mobile nodes with no fixed infrastructure. Since all nodes are in roaming, the topology of MANET is dynamic. Therefore, routing is the highly challenging task when node mobility is high. Different types of routing protocols are proposed in literature, and each has some advantages and limitations. This work proposes fuzzy logic and genetic approach to select optimal routes to satisfy QoS required by applications using MANETs. Fuzzy rule based system is formed by the linguistic variables actual end to end delay (Ae), number of times the node leaves the network (Nl), number of packets dropped (Nd) and number of Rrep generated (Nr). Simulations are conducted with the proposed method. Numeric results show that fuzzy genetic approach for routing improves the performance than existing AODV routing protocol.
Keywords:	Mobile Ad Hoc Network (MANET), Fuzzy Logic Routing, Genetic Algorithms.
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	NETWORK LAYER SPECIFIC DATA TRANSMISSION FOR INTEGRATED NEXT GENERATION NETWORKS
Author:	S.ANANDA KUMAR, Dr.K.E .SREENIVASA MURTHY
Abstract:	Being digitized the communication system, channels are having a severe workload in the current scenario. The internet and 4G services available in the global world are able to provide good service to both stationary and moving devices. Huge number of devices can be introduced in a specific region of the network. Devices can be operated in any layer of the network. Most of the challenges are faced in cross platform based service during handoff. For these kinds of handoff problems, this paper proposes a technology, which includes a variety of header formats in IP-v6 header format and a suitable protocol for cross layer handoff. This work is done on a layer wise handoff and dual communication with two base stations when handoff occurs. Multiple header format supports reliable, uninterrupted and delay avoidance in the communication system. The authorization and authentication are enhanced with two control units.
Keywords:	Authentication, Authorization, Handoff, Signal Strength.
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	DATA REPLICATION USING MODIFIED D2RS IN CLOUD COMPUTING FOR PERFORMANCE IMPROVEMENT
Author:	S.KIRUBAKARAN, Dr.S. VALARMATHY, C.KAMALANATHAN
Abstract:	In cloud computing environments failures are normal rather exceptional. To advance the system availability, the frequently used data should get replicated to multiple locations to make the users to access from the nearby site. To decide a reasonable number and right location of replicas is a challenging task in cloud computing. Here, we recommend a Modified Dynamic Data Replication Strategy (MDDRS) to decide a reasonable number and right location of replicas and we compare both the modified dynamic data replication strategy and Dynamic Data Replication Strategy (DDRS). The DDRS has three different stages which are the identification of data file to replicate, number of replicas to be created and placing new replicas. We modify the popularity degree in the first stage of normal dynamic data replication strategy and the other two stages are similar to the normal dynamic data replication strategy. In addition we incorporate the synchronous and asynchronous updation of replica data file when we update the main data center.
Keywords:	Cloud Computing, Data Replication, Popularity Degree
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	AN EFFICIENT ALGORITHM FOR PRIVACY PRESERVING TEMPORAL PATTERN MINING
Author:	S.S.ARUMUGAM, Dr.V.PALANISAMY
Abstract:	Pattern mining increases extra awareness due to its practical relevance in many fields, such as, biology, medicine and so on. Recently, a few researches have been presented in the literature about the mining of privacy preserving patterns. There are more number of data mining techniques developed to find out important information, yet the way of mining the data from the database is not concerned about the privacy. In this paper, we have selected the medical database and created the privacy on the patient’s medical database while the hospitals share their data to other organizations. In case of sharing the medical data, preserving the privacy of the data is also of importance as it may lead to violation of individual (patient) highly personal information. Based on the organizational need, the hospital can make the privacy on particular datum alone, say on type diseases. In that respective way, a choice is given to the hospital to where to make the privacy and this may vary depending on the organization. Here, we have made the privacy on four different types of diseases grouped as sensitive diseases, frequent diseases, seasonal diseases and geographical diseases. Privacy of the patient records are obtained by modifying the original database. Here, Prefix span algorithm was used for mining important diseases from the database. The result of mining was not worthy comparing the result with the original medical database. Finally the experimentation was made with the synthetic dataset and an analyzes on the difference among the four types of diseases while make the privacy in terms of the execution time, memory usage, was done.
Keywords:	Privacy Preserving, Medical Database, Prefix Span, Sensitive Diseases, Frequent Diseases, Seasonal Diseases And Geographical Diseases.
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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Title:	QUALITY OF SERVICES ROUTING FOR MOBILE AD HOC NETWORKS
Author:	ABDESSADEQ FETTOUH, ABDELAZIZ EL FAZZIKI, NAJIB EL KAMOUN
Abstract:	The field of ad hoc networks is very promising since it allows the spontaneous creation of a network without any infrastructure. An ad hoc network consists simply of user terminals that can communicate together without intermediate. Simple and intuitive way of designing ad hoc networks is to consider that they correspond to the ultimate generalization of wireless networks because they limit the maximum role of fixed infrastructure. This generalization is achieved by improving the connectivity capabilities of wireless LANs. The limited scope of the terminals requires the presence of a routing protocol for communication between distant entities. Several routing protocols have been proposed in the MANET group. They allow finding the shortest paths in terms of number of hops. As Quality of Service (QoS) is an important issue in all networks (IT and telecom) , it seems interesting to study ways to introduce this concept in mobile ad hoc networks ( MANETs ) where the terminals are in movement relative to each other . In fact, multimedia applications that we know today require QoS guarantees more or less important that it would be good proposed in such still experimental networks. QoS can be provided at different levels: application layer, transport layer, network layer, MAC layer, etc. In this article, we focus on routing solutions to ensure a certain quality of service in mobile ad hoc networks at the network layer. To achieve this goal, many practical issues are considered with proposed solutions. We provided Quality of services of ad hoc networks by analyzing performance of different routing protocols. Different scenarios with the Network simulator OPNET are performed. The test-bed is first described, followed by the results and analysis. We concluded the paper with a summary of the key results of the work.
Keywords:	Quality Of Services, Ambient Networks, MANET, AODV, OLSR, TORA
Source:	Journal of Theoretical and Applied Information Technology December 2013 -- Vol. 58. No. 2 -- 2013
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