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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 November 2010 | Vol. 21. No.2

Paper ID:	1407 -JATIT
Title:	D-METRIC SPACES IN AGGLOMERATIVE CLUSTERING
Author:	Mrs. M. SREEBALA , MR. G. NAGESWARA RAO, DR.S.SAI SATYANARAYANA REDDY
Source:	Journal of Theoretical and Applied Information Technology Vol 21. No. 2 -- 2010
Abstract	Hierarchical agglomerative clustering merges the clusters basing on their distance similarity. In this paper we present a new mathematical method called D metric spaces by Indian mathematician B.C.Dhage who has submitted his thesis in 1984 at Maratwada university. We present an algorithm for hierarchical clustering using D metric concept instead of Euclidean distance which reduces the total number of iterations ,complexity and computation time. Here we showed an example that contains the results of both techniques and also comparisons
Keywords	Agglomerative Clustering, Single Linkage Clustering, D Metrics Spaces
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Paper ID:	1402 -JATIT
Title:	THE SUCCESS OF LEARNING MANAGEMENT SYSTEM AMONG DISTANCE LEARNERS IN MALAYSIAN UNIVERSITIES
Author:	IBRAHIM ABOOD ALMARASHDEH, NORAIDAH SAHARI, NOR AZAN MAT ZIN, MUTASEM ALSMADI
Source:	Journal of Theoretical and Applied Information Technology Vol 21. No. 2 -- 2010
Abstract	Continuing formal education is essential for distance learners to improve their learning skills and knowledge to meet the challenge career in modern competitive world. This study examines the success factors that influence learners' use of the Learning Management System (LMS) and tests the applicability of the propose model, in the context of distance learning practices in higher education. A survey was conducted to higher education learners who involved in distance learning instruction. This study used a set of questionnaire which was adapted from the literatures to examine three groups of dimensions, system design (system quality, service quality, information quality, usefulness and ease of use), system usage (system use, behavioural intention to use and user satisfaction) and System Outcome (net benefit). Using data from a survey to distance learning students (N=425), a path analysis revealed that system design has a significant influence on user satisfaction and intention to use of the LMS which directly affect the use of the system. Consequently user satisfaction and system used show strong impact to the net benefit
Keywords	Information system success, technology acceptance model, educational technology model, system design. System usage, system impact
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Paper ID:	1472 -JATIT
Title:	ON PROPOSING SCHEME FOR REDUCTION OF PAPR IN OFDM SYSTEM UNDER EQUALIZATION
Author:	MONA SHOKAIR
Source:	Journal of Theoretical and Applied Information Technology Vol 21. No. 2 -- 2010
Abstract	Orthogonal Frequency Division Multiplexing (OFDM) system gives more attentions due to its high data rate and its capability to combat multi-path interference. In this paper, two aims will be studied. First aim is to simulate OFDM system with equalization using Minimum Mean Square Error (MMSE) and Zero Forcing (ZF). Simulation results demonstrate the validity of the analytical results over Stanford University Interim (SUI) channels and AWGN, which are not clarified until now. Also, QAM constellations of this system are shown under different sub-carriers and modulation techniques over different SUI channels to illustrate these results. Other aim is to suggest a proposed scheme of OFDM system with equalization over SUI channels to decrease Peak to Average Power Ratio (PAPR). This proposed scheme combines conventional technique and compander technique. Optimum  will be used in this proposed technique. Comparisons will be made between the system that is used proposed technique and the system without reduction. Simulation results show that the proposed technique is more efficient for reduction of PAPR.
Keywords	OFDM, SUI channel, compander, clipping, MMSE and ZF
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Paper ID:	1197 -JATIT
Title:	DESIGN OF ADAPTIVE KNOWLEDGE LEARNING AND MANAGEMENT SYSTEM FOR LARGE FOOD AND BEVERAGE INDUSTRY BASED ON SHARING AND DISCUSSION TECHNIQUE
Author:	Chen-Feng Wu, Cheng-I Hou
Source:	Journal of Theoretical and Applied Information Technology Vol 21. No. 2 -- 2010
Abstract	E-Learning is a new way of learning which is caused by the flourishing development of computer and electronic information technology. The teaching and learning are not to be limited by space and time through the Internet. Besides, they can develop the flexibility and popularity of interactive teaching. By the digital records of e-Learning and assessment in the computer information system, managers could effectively handle learning results of the learners, and combine the results with the development of human resource and the financial operation system, to achieve the effective enterprise resources integration. In recent decades, the rapid development of information technology causes that large food and beverage enterprises take information technology into supporting internal operating procedures. However, effective utilization of technological resources within an organization is limited. To face the pressure of business competition and globalization, enterprises have been engaging in the activities of Knowledge Management, and actively exploring that how to promote knowledge management within the company, through which way to create a competitive advantage by knowledge management. However, the knowledge sharing is an important core issue of knowledge management. In other words, knowledge management decides if it would success or failure. This paper would try to build an e-learning system of adaptive learning within an organization. Moreover, it would help employees learning development and effective use of corporate resources and also to be helpful for the expectations of the business organization strategic development. This paper takes enterprise into the research object and helps them to establish the adaptive e-Learning System. We expect this system would improve substantial benefit of the human resources management and development, Planning of Decision Support System. It also improves the effective planning of human resources, to match employees career planning with corporate. Employees could learn knowledge via e-learning management system, an effective solution to multinational staff of vocational training and time-consuming and cost issues.
Keywords	E-Learning, Adaptive Learning, Knowledge Share
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Paper ID:	1540 -JATIT
Title:	A NEW EVALUTIONARY ALGORITHMS USED FOR OPTIMAL LOCATION OF UPFC ON POWER SYSTEM
Author:	K. VENKATESWARLU, CH. SAIBABU
Source:	Journal of Theoretical and Applied Information Technology Vol 21. No. 2 -- 2010
Abstract	Recent trends in power systems are mostly undergoing research in the area of widespread failures. With the increase in power demand, operation and planning of large interconnected power system are becoming more complex, so power system will become less secure and stable. Operating environment, conventional planning and operating methods can leave power system exposed to instabilities. Voltage stability is one of the phenomena which have result in a major blackout. Moreover, with the fast development of restructuring, the problem of voltage stability has become a major concern in deregulated power systems. FACTS controllers narrow the gap between the no controlled and the controlled power system mode of operation, by providing additional degrees of freedom to control power flows and voltages at key locations of the network because of their flexibility and fast control characteristics. Placement of these devices in suitable location can lead to control in line flow and maintain bus voltages in desired level and so improve voltage stability margins. This paper presents a GA and PSO analysis based allocation algorithm for Unified Power Flow Controller (UPFC) considering Cost function of UPFC device, Voltage stability indices(VSI) for optimal placement, Improvement of voltage profile and Reduction of power system losses. Proposed algorithm is tested on a IEEE- 5 bus and IEEE-30 bus test power system for optimal allocation of UPFC device and results are presented.
Keywords	Voltage stability index(VSI), Unified Power Flow Controller (UPFC), Genetic Algorithm (GA), Particle Swarm Optimization (PSO)
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Paper ID:	1533 -JATIT
Title:	USING XML FOR USER INTERFACE DOCUMENTATION AND DIFFERENTIAL EVALUATION
Author:	Mohammad Tubishat, Izzat Alsmadi, Mohammed Al-Kabi
Source:	Journal of Theoretical and Applied Information Technology Vol 21. No. 2 -- 2010
Abstract	In any software product, the user interface is one of the most important parts that defines the communication between the user and the system. One of the challenges in user interfaces is in the ability to save its state at any time as in many cases, especially in problems such as power interruptions; there is a need to save the last �good� state. In some other cases, there is a need to see if the user interface state is changed or to compare the current state with a previous one. This is required for several possible cases such as: evaluation, and changes in requirements, design and implementation. The format used for storing the state of the Graphical User Interface (GUI) should be global and can be easily used by different types of applications (such as the XML format). A GUI state is usually defined as the overall combination of properties of all the components or widgets of the GUI. In this paper an alternative back end representation is proposed for user interfaces and their state from their original format within the applications. In this approach the user interface is converted to an XML file. This XML file represents the current state of the user interface. To avoid state explosion, in this representation the contents of the state considers only the structure of the user interface and ignores controls� properties that are state irrelevant. A control property is considered as state relevant if it may cause a state change if its property is changed. For example, in a GUI control, the control name, ID, tag, etc are usually irrelevant to the GUI state change compared to the control location, color, or the �visibility� and �enable� properties which are state relevant. The XML file format is largely used and accepted by many software applications. It is the infrastructure language for web pages and database management systems. User interface documentation is useful for future evaluation and comparison and useful for stakeholders� communication. In this research, it is also proposed for GUI testing activities such as regression testing where testing is triggered if there is a change in the state of the user interface. A tool is developed to automatically evaluate the possible changes of the user interface d. Several open source projects are used for testing and evaluation. In each case, different types of GUI state changes are designed, tested and evaluated.
Keywords	GUI states, user interface testing, modeling, XML, and state charts
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Paper ID:	1476 -JATIT
Title:	IMPLEMENTING SECURITY LAYERS ON FILE SYSTEM. A Study
Author:	ASHIKALI M. HASAN
Source:	Journal of Theoretical and Applied Information Technology Vol 21. No. 2 -- 2010
Abstract	STEGANOGRAPHY is defined as the art of hiding information. STEGANOGRAPHY and cryptology are similar in the way that they both are used to protect important information. The difference between the two is that STEGANOGRAPHY involves hiding information so it appears that no information is hidden at all therefore the person will not attempt to decrypt the information. In STEGANOGRAPHY the different file formats can be used for the purpose of hiding the information like for example the video or audio etc. STEGANOGRAPHY comes from the Greek words STEGAN�S (Covered) and GRAPTOS (Writing). STEGANOGRAPHY in the modern day sense of the word usually refers to information or a file that has been concealed inside a digital Picture, Video or Audio file.
Keywords	Steganography, Hidden Information, Graptos, Decryption, Information Hiding
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Paper ID:	1488 -JATIT
Title:	FITNESS FUNCTION FOR RENDERING IN THE LOOP DIFFERENTIAL EVOLUTION ALGORITHM
Author:	M. OLGUIN-CARBAJAL, R. BARRON-FERNANDEZ, J. L. OROPEZA-RODRIGEZ
Source:	Journal of Theoretical and Applied Information Technology Vol 21. No. 2 -- 2010
Abstract	Optical properties of scenario objects for rendering realistic images synthesis are highly important for computer graphics. We have proposed a methodology to obtain some illumination parameters of a real scenario represented by an acquired image and use these parameters for the adequate rendering of an equivalent virtual scenario made by hand. The proposed methodology uses an acquired image that we call ObjetiveImage and compare it with a rendered equivalent image of a virtual scenario, called RenderedImage that represents the original. The real scenario is approached by hand, but some of the illumination parameters like light source position and intensity as well as objects color are searched by using a Differential Evolution algorithm. Rendering images that approximate to the real acquired image, by some virtual scenario parameter modification based on the DE search, we call "Rendering in the loop". Finally we use the obtained parameters to render a better resolution image to obtain the result. The fitness function for the comparison of the two images is the most important search in this investigation.
Keywords	Differential Evolution, Rendering, Loop, Optical
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