Welcome to Journal of Theoretical and Applied Information Technology

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Software engineering is an expensive venture to undertake mainly due to not knowing exactly where to focus the reengineering efforts. This is where coupling and cohesion play an important role. Both the metrics, especially cohesion metric, are a potential identification tools that can also measure progress. The current cohesion metrics for classes overlook the characteristics of indirect usage of the instance variables that are so often applicable in a class. Therefore, they are not an ideal reflection of the cohesiveness of the class. Nevertheless, when the variability factor is taking into consideration, the class cohesion factor has not been quantitatively studied. In this paper, we will propose the updated cohesion metrics based on the role of indirect usage of the instance variables. This updated version of cohesion and coupling relation can be used as an indicator to measure changeability. In this paper, we present an approach for remodeling the cohesion metrics by analyzing the characteristics of the indirect instance variable usage in an object-oriented program that can be used as a quality indicator in terms of changeability.

Cohesion metrics ; Instance Variable ; Changeability; LCOM; Co; Coh, TCC; LCC; CBMC

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An innovative knowledge-based methodology for terrorist detection by using Web traffic content as the audit information is presented. The proposed methodology learns the typical behavior of terrorists by applying a data mining algorithm to the textual content of terror-related Web sites. The resulting profile is used by the system to perform real-time detection of users suspected of being engaged in terrorist activities. The Receiver-Operator Characteristic (ROC) analysis shows that this methodology can outperform a command based intrusion detection system.

Data Mining, User Modeling, Terrorist Trend Detection, Anomaly Detection, Activity Monitoring.

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In this paper we propose a new model to calculate inference levels in wireless multi-hop ad-hoc networks. This model computes the expected value of carrier to inference ratio(C/I) by taking into account the number of nodes, density of nodes, radio propagation aspects, multihop characteristics of the network and amount of relay traffic.
For the performance evaluation and determination of the capacity in any wireless network, it is important to have good calculation model to estimate interference power statics to our best knowledge till now there has been no accurate calculation model to estimate the expected interference power and its distribution function in adhoc network and sensor networks with realistic assumptions regarding radio propagation.
To find a mathematical formula for expected interference in adhoc networks, we have simplified the reality of adhoc networks in three aspects:
1. We have used the path loss radio propagation model,
2. We have chosen for a specific arrangement of nodes on a two dimensional hexagonal lattice resembling a honey grid(which explains the name given to our model: the honey grid model),
3. We have simplified the rules of the MAC protocol.

Wireless Communication, Path Loss Exponent ,MAC Protocol, Lognormal Summation Method

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Tasks Allocation, Game Theory, Non-Cooperative Game, Nash Equilibrium, Distributed Algorithm

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Cryptography is the study and practice of scrambling information in a manner that is difficult to unscramble, and making scrambled information intelligible. It is used as the basis of much computer security, in that it can be used to keep information confidential, and also preserve the integrity if data, particularly when being stored or being transmitted. Most Geographic Information System (GIS) data providers have a problem protecting their data from being copied and accessed by unauthorized users. Most of the researches in this area focus on how to copyright the GIS data using the concept of digital watermarking. However, watermarking has a lot of limitations and if it is used alone, it will not able to achieve the goal. In this paper, we will introduce a new mechanism to protect the GIS data by combining the RC6 and hash functions cryptography algorithms with watermarking techniques. This mechanism can be applied to both raster and vector GIS data.

RC6, GIS, Encryption, DTEDPM

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Distributed databases have invested considerable effort and system resources in the development and adoption of dynamic distributed databases services. In order to sustain the quality of their services, Business process management need to solve the problem of efficient and secure electronic exchange and processing of system database. A major difficulty in this distributed deployment is the fact that these interconnected systems are heterogeneous and they may operate in multiple organizational domains. This paper demonstrates how the ISO/RM-ODP standard offers a general framework to design and develop an open distributed system attuned to dynamic distributed databases environments.
The purpose of the RM-ODP is to define such a framework. The Reference Model for Open Distributed Processing (RM-ODP) provides a framework within which support of distribution, inter-working and portability can be integrated. It defines: an object model, architectural concepts and architecture for the development of ODP systems in terms of five viewpoints. However, RM-ODP is a meta-norm, and several ODP standards have to be defined. In this paper, we report on the definition and address of the syntax and semantics for a fragment of ODP object concepts defined in the RM-ODP foundations part and in the information language. These concepts are suitable for describing and constraining dynamic distributed databases information specifications.

RM-ODP, dynamic distributed database (DDB), Meta-modeling Semantics, UML/OCL

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Real Time Database Systems (RTDBS) designers are charged with systems that produces results in a timely and consistent fashion. Therefore, the design of this kind of databases needs user requirements to support both data structures and the dynamic behaviours of the database algorithms using visualization technique. In this paper, we present a user-centered visualization based on our understanding of the work RTDBS and the needs of designers derived from the first significant user study of RTDBS. The tool presents RTDBS designers with both �at a glance� understanding of algorithm behavior, and low-level details. The overall satisfaction mean score was 4.83 (std. dev. = 1.27), with mean satisfaction score for the visualization component being 5.17 (std. dev. = 1.11). Users rated the ease of learning a mean score of 4.42 (std. dev. = 1.44). Also, users self-rated performance was strongly correlated to ease of learning (Pearson, 0.84, p<0.001), mirroring the desire for the tool to be easily learnable for success. Also, the user rated the ease of searching and of seeing patterns and anomalies in the data with a mean score of 5.25 (std. dev. = 0.96) and 4.42 (std. dev. = 1.56), respectively. Results from preliminary usability testing of a case study show that users performed better and found easier those RTDBS tasks.

Information visualization, RTDBS, User-Centered design, Usability testing

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Vendor is an important constituent in the supply chain and supply chain management is truly vendor management. Performance evaluation based vendor selection is a decision of strategic importance to an industry. This paper introduces the concept of relative reliability risk assessment especially for new vendors, where information availability is inadequate to calculate reliability. The paper deals with multiple attributes of vendor to which Analytical Hierarchy Process is applied using verbal assessments for relative measurements. The technique used for assigning weights is the entropy method. Final value of Relative Reliability Risk Index (R3I) is calculated. The concept of Alternatives Functionality Graph is introduced. A real life case study considering Multiple Attribute Decision Making (MADM) with proposed method is illustrated.

Reliability, Analytical Hierarchial Process (AHP), Relative Reliability Risk Index (R3 I), Alternative Functionality Graphs (AFGs), Multiple Attribute Decision Making (MADM), Win-Win type of relationship

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The recent advancements in the telecommunication industry have brought forth many changes in the field. One of the most important is a shift towards the wireless communication scenario. Wireless ATM is fast becoming a solution in this direction. With WATM gaining momentum it is very important that the underlying ATM network is well laid out. One of the most important research issues in the ATM scenario is the optimized usage of bandwidth. In this paper we have proposed an Enhanced Genetic Algorithm (EGA) algorithm approach based solution for optimization of bandwidth through dynamic routing in ATM network. Previous research work shows that traditional optimization heuristics result in sub-optimal solution. In this paper we have explored non-traditional optimization technique specifically EGA. The results obtained thus prove that EGA can become a potential solver algorithm for obtaining optimized bandwidth. The optimized bandwidth could mean that some attractive business applications would become feasible such as high speed LAN interconnection, teleconferencing etc. We have also performed a comparative study of the selection mechanisms in GA and listed the best selection mechanism and a new initialization technique which improves the efficiency of the EGA.

Asynchronous Transfer Mode (ATM), Wireless ATM (WATM), Genetic Algorithm (GA), Enhanced Genetic Algorithm (EGA)

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The paper aims to discuss the Information Integrity issues in the wake of increasing business integration on account of increasing ICT usage. It goes further to suggest an analytical solution and illustrate the same by applying it to Production and Distribution Management In order to do the above the paper defines information integrity and suggests a model of Information Base Management System with an acquisition and utilization cycle attached. The model rests on an Information Topology Plane. The model also suggests a mechanism to originate the information in the acquisition and utilization cycle with a view to preserve information integrity. Business integration is on the rise on account of increased usage of information technology systems. In wake of this situation the key issue is no more information manipulation, it is to ensure the accuracy, consistency and reliability i.e. information integrity. The paper adds authentic value as it suggests the need for information integrity in the wake of uncertainties arising in industrial management systems on account of increased automation and information technology usage. In order to do this it suggests a unique Information Base Management System and information origination mechanism for the same. An illustration of implementation of the model is shown using a lucid example of Production and Distribution Management

Information Systems, Uncertainties, Business Environment, Acquisition Cycle, Utilization Cycle, Enterprise Development