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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 May 2012 | Vol. 39 No.1

Title:	PERFORMANCE COMPARISONS OF INTERFACE CIRCUITS FOR MEASURING CAPACITANCES
Author:	PRABHU RAMANATHAN, MARIMUTHU.R, R. SARJILA, SUDHA RAMASAMY, P.ARULMOZHIVARMAN
Source:	Journal of Theoretical and Applied Information Technology pp 001 - 005 Vol 39. No. 1 -- 2012
Abstract	This paper reviews some of the recent signal conditioning and Interface circuits for the capacitive type sensors. This paper gives the brief idea of advantages and limitations of interface circuits for the various capacitive sensors. The sensor output may be either current or voltage but it has to be converted to the desired output range only by the signal conditioning circuit. Signal conditioning circuits provides the analog output in the desired range; this can be converted to digital through Analog to Digital converter. The signal conditioning circuit should able to produce not only the convenient of output voltage or current levels but it has to provide the isolation, impedance matching, linearization with the input, proper gain adjustment with the amplification, filtering of unwanted signals, etc. Here we reviewed the four different methodologies of the proposed signal conditioning and interfacing circuits with its advantageous and limitations.
Keywords	Signal Conditioning, Interfacing Circuits, Capacitance to Digital Converter, Sigma Delta Modulator, Capacitive Sensors, and Capacitance Measurement.
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Title:	PITCH ANGLE CONTROL FOR VARIABLE SPEED WIND TURBINES USING GENETIC ALGORITHM CONTROLLER
Author:	OUISSAM BELGHAZI, MOHAMED CHERKAOUI
Source:	Journal of Theoretical and Applied Information Technology pp 005 - 010 Vol 39. No. 1 -- 2012
Abstract	The pitch angle control is the most common means for adjusting the aerodynamic torque of the wind turbine when we rate wind speed, controlling various variables could be chosen, as generator power, generator speed and wind. As conventional pitch control customarily use PI controller, the mathematical model of the system should be well known. The controller design by the genetic algorithm is developed in this paper. The genetic algorithm control strategy may have the potential when the system contains strong non-linearity, such as wind turbulence is strong. The design of controller strategies at is minimum will address the following elements: Optimization of power production with simultaneous load reduction of the main wind turbine components, Adapt control with respect to real operational conditions. In my research I found out that the genetic algorithm controller can achieve better control performances than conventional pitch angle control strategies.
Keywords	Pitch Angle, Genetic Algorithm, Wind, Turbine, Control
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Title:	DOES INFORMATION AND COMMUNICATION TECHNOLOGY DEVELOPMENT CONTRIBUTES TO ECONOMIC GROWTH?
Author:	MARYAM FARHADI, RAHMAH ISMAIL
Source:	Journal of Theoretical and Applied Information Technology pp 011 - 016 Vol 39. No. 1 -- 2012
Abstract	This paper studies the impact of Information and Communication Technology (ICT) development on economic growth in different countries and regions of the world. The results indicate that there is a positive relationship between real GDP growth and ICT development (as measured by the ICT Development Index) for 153 countries over the world. This study also finds that ICT development in the upper-middle income group has a higher effect on economic growth than other countries. This implies that if these countries seek to enhance their economic growth, they need to implement specific policies that facilitate ICT development.
Keywords	Economic growth, Information and Communication Technology development, ICT
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Title:	CRYPTANALYSIS OF RSA THROUGH FORMAL VERIFICATION TOOLS
Author:	SACHIN UPADHYAY , YASPAL SINGH
Source:	Journal of Theoretical and Applied Information Technology pp 017 - 021 Vol 39. No. 1 -- 2012
Abstract	In this paper we are basically analyzing the results given by Wiener's, who says that if the private exponent d used in RSA cryptosystem is less than n^.292 than the system is insecure. We will focus on the result given by Weiner’s and try to increase the range of private exponent d up to n^0.5. As n is the product of p & q (which are the relative prime numbers). So our emphasis is how we can make our system secure(based on the breaking of keys), One solution can be by choosing a big prime numbers as p & q further the efficient use of RSA algorithm will help to make system secure.
Keywords	Cryptography, Cryptanalysis, Conjunctive Normal Form (CNF), Decryption, Encryption, RSA Algorithm, SAT Solver Tool
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Title:	OPTIMIZED SPAM CLASSIFICATION APPROACH WITH NEGATIVE SELECTION ALGORITHM
Author:	ISMAILA IDRIS, ALI SELAMAT
Source:	Journal of Theoretical and Applied Information Technology pp 022 - 031 Vol 39. No. 1 -- 2012
Abstract	This paper initializes a two element concentration vector as a feature vector for classification and spam detection. Negative selection algorithm proposed by the immune system in solving problems in spam detection is used to distinguish spam from non-spam (self from non-self). Self concentration and non-self concentration are generated to form two element concentration vectors. In this approach to e-mail classification, the e-mail are considered as an optimization problem using genetic algorithm to minimize the cost function that was generated and then classification of these cost function shall aid in creating a classifier. This classifier will aid in the new formation of algorithm that comprises of both greater efficiency detector rate and also speedy detection of spam e-mail. The algorithm implementation of the research work shall come in stages were spam and non-spam are detected in all phases for an efficient classifier.
Keywords	Negative Selection Algorithm, Neural Network, Support Vector Machine, Model, Self, Non-self
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Title:	A CROSS-LAYER FRAMEWORK FOR IEEE 802.16 OFDM NETWORKS
Author:	S. PRAVEEN PRAKASH, 2V.SAKTHIVEL
Source:	Journal of Theoretical and Applied Information Technology pp 032 - 039 Vol 39. No. 1 -- 2012
Abstract	OFDM is a promising technique for high bit rate transmission systems. In previous for a given transmit power constraint, the capacity region can be regarded as the set of low optimal operational with low number of users. In order to improve the QOS we need a new system. The Bit Error Rate (BER) of the scheme for binary phase-shift keying (BPSK) is also presented. Specifically, an algorithm is proposed that exploits the structure of the OFDM channel and whose convergence speed is essentially insensitive to the number of subcarriers. To improve the capacity dynamic routing, traffic scheduling, burst allocation and load balancing concepts are used. In dynamic routing the network destination is dynamically discovered. Traffic scheduling is used to improve the fairness. Load balancing is used to distribute the load evenly among the cell nodes. Burst allocation is used to choose the cyclic prefix.
Keywords	OFDM, QOS, QAM, PAPR, CDMA
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Title:	DIALOGUE CONTROL TECHNIQUE BASED ON CONFIDENCE CONFIRMATION ALGORITHM IN AUTOMATIC SPEECH RECOGNITION SYSTEM
Author:	Dr.C.P. SUMATHI, V. MEENAKSHI, Dr.T. SANTHANAM
Source:	Journal of Theoretical and Applied Information Technology pp 040 - 044 Vol 39. No. 1 -- 2012
Abstract	Over the recent years, speech recognition technology has been making steady and significant progress. Together with advances in robust parsing techniques, natural language generation algorithms, and the advent of high-quality speech synthesis systems, it has paved the way for the emergence of robust spoken dialog systems. This paper has focused on the process involved in determining what the user has intended at each dialogue turn in a mixed initiative dialogue, conditioned on a recognizer word graph with associated word confidence scores. The dialogue component directly influences the initial selection process at least whenever it has provided a specific context. The dialogue manager is the one component that has not only local information from each server, but also global knowledge about a particular user’s constraints. In this paper, the Confidence Confirmation Algorithm in the selection of recognition hypotheses in the context of human-machine interactions is described. Enhancements also made to other human language technology servers for the purpose of providing useful information to the dialogue manager, as well as new capabilities in the dialogue manager itself aimed at detecting and repairing problematic spots in the dialogue.
Keywords	Speech Recognition System, dialog control, confidence confirmation algorithm, Hidden Markov Model
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Title:	AN INTELLIGENT WATER DROPS ALGORITHM BASED SERVICE SELECTION AND COMPOSITION IN SERVICE ORIENTED ARCHITECTURE
Author:	PALANIKKUMAR D, GOWSALYA ELANGOVAN, RITHU B, ANBUSELVEN P
Source:	Journal of Theoretical and Applied Information Technology pp 045 - 051 Vol 39. No. 1 -- 2012
Abstract	Web services are defined as the pieces of software components, which are distributed over the internet using some standard protocols. With more and more web services become available, QoS is a decisive factor for selecting the most suitable service from a set of candidate services with the identical functionality. Thus the approach about the computation of the QoS is also becoming more important in the service selection. In this paper, we use an algorithm called “Intelligent Water Drops” or IWD algorithm which is inspired from natural science. It is based on the processes that happen in the natural river system. The actions and reactions that take place between the water drops are also considered. The river often chooses an optimal path regarding the conditions of its surroundings to get its ultimate goal, which is often a sea. These ideas are embedded into the web service selection and composition for providing efficient QoS web services. This proposed algorithm provides better computing performance than Particle swarm optimization algorithm (PSO).
Keywords	Computation, IWD algorithm, PSO algorithm, QoS
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Title:	DIRECT POWER CONTROL FOR AC/DC/AC CONVERTERS IN DOUBLY FED INDUCTION GENERATORS BASED WIND TURBINE
Author:	ABDELMALEK BOULAHIA, Khalil NABTI, HOCINE BENALLA
Source:	Journal of Theoretical and Applied Information Technology pp 052 - 056 Vol 39. No. 1 -- 2012
Abstract	In this paper direct power control (DPC) strategy is applied to control a doubly fed induction generator (DFIG) based wind energy generation system. A AC/DC/AC converter is controlled by direct power control method. The rotor side converter is controlled by selects appropriates voltage vector based on the instantaneous errors between the reference and estimated values of active and reactive powers and rotor flux position. Also the Grid side is controlled by direct power control based a grid voltage position to ensures a constant DC voltage, Simulation results demonstrate robust, precise, and fast dynamic behavior of system.
Keywords	Direct Power Control (DPC), Doubly-fed Induction Generator (DFIG), AC/DC/AC PWM Converter
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Title:	DISTRIBUTED ENVIRONMENT OF LEARNING SUITABLE FOR TELEPHONY AND MOBILE COMPUTING
Author:	ALASSANE DIOP
Source:	Journal of Theoretical and Applied Information Technology pp 057 - 064 Vol 39. No. 1 -- 2012
Abstract	A training platform online is an environment that affords the conduct of long distance teaching. It’s an online training environment that is made of tools to facilitate the use of the system various functional devices. It also allows to simplify long distance consultation of teaching contents, the tailoring of the apprenceship and the service protector. It as well allows to implement flexible solutions that can fit all types of profile in accordance with their roles, with actors such as learners, trainers or teaching ideas men. A platform gets notably a long distance access to the teaching resources that allows in that way to solve the constraint of physical presence in a classroom, the management and the individual organization of the timetable. The environment can offer to each and every one of the learners to take care of himself; and handles his progression and with his rhythm interacts with the trainers or collaborates with the other learners. Considering their growing evolution, the telephony and the mobile computing constitute now means of communication widely used in all circles; they form helpful means to have access to information because they use easily transportable equipment and very suitable for mobile users. Besides the implementations are relatively easy to use thanks to the wireless application protocol (WAP), the mobile terminals have access to data processing programs in the network. In this way, the use of mobile computers, small ones and mobile phones which have various degrees functionality as apprenticeship support can help to spread out geographically the area of coverage for the long distance teaching. Yet the mobile terminals present, particularly for the most current mobile phones, limitations that are often link to their restricted random access memory (RAM); their small data storage, the reduce size of the screen, the lack of color of certain devices and mostly the lack of possibility to be online to the internet network. Despite all the conjured up constraints, the telephony and the small size computers use in an asset for the spreading of the pedagogical contents of the apprenticeship and the access to the online laboratories. In this communication, we are going to present our process that has led to the online apprenticeship environment setting up that has fitted the mobile phone and small computers. This virtual teaching environment and of online apprenticeship named E-mobile learning (E-ML) take into account the specific limitations of mobile terminals. The results allow to the learners to get the content of courses at real time and at every time without any constraint of place, space and bandwidth limitation. This solution will afford students to follow their courses on a mobile phone screen on a small computer named Personal Digital Assistant.
Keywords	WAP, Mobile, Telephony, E-Learning
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Title:	DYNAMIC RESOURCE ALLOCATION FOR LAYER-ENCODED VIDEO MULTICASTING OVER WIMAX NETWORKS
Author:	C. NISHANT PAUL, V. SAKTHIVEL
Source:	Journal of Theoretical and Applied Information Technology pp 065 - 070 Vol 39. No. 1 -- 2012
Abstract	This paper presents a method to multicast multiple videos to a set of users (Subscriber Stations) from a Base Station using WiMAX networks by incorporating layer encoded streaming technique. This method makes the system dynamically adapt to the channel quality available and also ensures Quality-of-Service (QoS) and maximum satisfaction to all users. The advantage of using this system is that the available bandwidth can be utilized to the maximum and any unused processes can have its resource freed.
Keywords	WiMAX, QoS, Multicasting, Layer Encoding, Video Transmission
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Title:	COOPERATIVE SPECTRUM SENSING FOR OFDM BASED COGNITIVE RADIO NETWORKS
Author:	MONA.SHOKAIR, SAHAR.SAID, RANA. GHALLAB , M.I.DESSOUKY, S.EL-ARABIE
Source:	Journal of Theoretical and Applied Information Technology pp 071 - 076 Vol 39. No. 1 -- 2012
Abstract	Due to the increase in the usage of wireless devices and the consequent spectrum allocation radio spectrum is becoming scarce. However, studies have shown that most of the allotted spectrum is not used for large periods of time. Cognitive radio (CR) has been proposed to exploit the presence of the spectrum holes. To use the unused spectrum, spectrum sensing is need to know if the primary user (licensed user) exist or not where the spectrum sensing problem has gained new aspects with cognitive radio and opportunistic spectrum access concepts. It is one of the most important operations of cognitive radio, determines the efficiency with which the secondary users or cognitive users (CU) can use the primary spectrum, without causing appreciable interference to the primary users. Severals factors like fading and shadowing affects the ability of the cognitive radio to detect the primary user. In this paper, the performance of cooperation based spectrum sensing scheme will be studied for OFDM (orthogonal frequency division multiplexing) based cognitive users using the energy detector method .The effect of variable channel gain on the cooperation between secondary users will be investigated which is not clarified until now. Moreover, the effect of fusion rules will be made. AWGN will be assumed. Simulation results show that improvement using OR rule with cooperative scheme is better than using AND rule .This is because OR rule is very conservative for CRs to access licensed band.
Keywords	Wireless, Cognitive Radio, Cognitive Users, OFDM, AWGN
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Title:	SWARMMING NANOROBOTS OF JOINT INTENTION FOR CHOLESTEROLE FREE BLOOD ARTERIES
Author:	GHADA AL-HUDHUD
Source:	Journal of Theoretical and Applied Information Technology pp 077 - 087 Vol 39. No. 1 -- 2012
Abstract	Recent advances in the nanorobots design and implementation field considers requirements that serve medical applications according to one of two scenarios: drug delivery and discovery tasks. These scenarios are based on detecting threshold concentration of specific chemicals emitted by cells or searching particular places in the human body and acting upon findings. These scenarios emphasize local self-coordination but lack the global coordination over long distances to cooperatively accomplish group task. Considering the scenario of launching a swarm of nanorobot in blood artery for the purpose of cutting cholesterol plaques, the proposed model identifies flocking based coordination between nanorobots in the swarm. The proposed model includes both decentralized and centralized coordination for possessing both the local information within the swarm and global information for interactive task assignment by the medical specialists. In addition the medical specialist can interactively cancel task, re-assign new task whilst monitoring task accomplishment. The task is simply searching Cholesterol threshold size in a specified location in blood artery. The experimentation results has shown to be efficient as it overcomes coverage based particle swarm optimization problem.
Keywords	Medical Nanorobots, Decentralized-Centralized Coordination, Uncertain Information During Swarm Navigation, Globalized Interactions In Light Of Joint Intention
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Title:	A NEW POWER SYSTEM RESTORATION AND RECONFIGURATION USING FIELD PROGRAMMABLE GATE ARRAY
Author:	SATHISH KUMAR K, BELWIN EDWARD J, SARAVANAN B, SUDHAKAR N, PRABHAKAR KARTHIKEYAN S, RAVI K
Source:	Journal of Theoretical and Applied Information Technology pp 088 - 097 Vol 39. No. 1 -- 2012
Abstract	The aim of this paper is to optimize the system after restoring and reconfigure the faulted area in a distribution network after isolating the faulted block. Restoration involves changing the switch status to maximize the supply to loads that are left unsupplied after fault removal. After system optimization using reconfiguration, Field Programmable Gate Array (FPGA) is used in order to control the switches by generating the pulses for the stable configuration. In the proposed system restoration and reconfiguration process is achieved in 16 bus system and simultaneously load flow analysis is performed before and after the fault and the same is verified in MATLAB. Optimization using Binary Particle Swarm Optimization (BPSO) is done in order to get the most stable configuration for restoration process by minimizing the LBI (Load Balancing Index).
Keywords	Load Balancing Index, Field Programmable Gate Array and Binary Particle Swarm Optimization
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Title:	PERFORMANCE OF COOPERATIVE DIVERSITY IN COGNITIVE RELAY NETWORKS
Author:	S. SAID , M.SHOKAIR , M.I.DESSOUKY, S.EL-ARABIE
Source:	Journal of Theoretical and Applied Information Technology pp 098 - 103 Vol 39. No. 1 -- 2012
Abstract	In a network with dynamic spectrum access, secondary users equipped with frequency-agile cognitive radios communicate with one another via spectrum that is not being used by the primary users or licensed users of the spectrum . We consider a scenario in which a secondary transmitter can communicate with a secondary receiver via a direct communication link or a relay channel. Cooperative relay communications or cooperative diversity has received a lot of attention in recent years. Two well known cooperative strategies are known as Amplify And Forward (AAF) and Decode And Forward (DAF). In this paper, the AAF strategy will be considered, which achieves diversity by using Maximal Ratio Combining (MRC) and Fixed Ratio Combining (FRC) which is not clarified until now. From simulation results, we can conclude that using both of the direct and relay channels, the transmissions performance of the secondary system can be improved significantly , Moreover, exploiting cooperative spectrum sensing technique for applications in a relay based cognitive radio network , it is seen that detection probability increases by using relay channel . The best performance was achieved when the relay is at equal distance from the sender and the destination or slightly closer to the sender.
Keywords	Cognitive radio, Cooperative diversity, Relay
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