- From: David Cummings <wsctokyo07@gmail.com>
- Date: Mon, 22 Jan 2007 14:35:09 -0600
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The contents of the latest issue of: International Journal of Information Technology and Web Engineering (IJITWE) Official Publication of the Information Resources Management Association Volume 2, Issue 1, January-March 2007 Published: Quarterly in Print and Electronically ISSN: 1554-1045 EISSN: 1554-1053 Published by Idea Group Inc., Hershey, PA, USA www.idea-group.com/ijitwe Co-Editors-in-Chief: Ghazi Alkhatib, Applied Science University, Amman, Jordan David Rine, George Mason University, USA Special Issue: 4th International Multiconference on Computer Science and Information Technology CSIT 2006 GUEST EDITORIAL PREFACE: Eyas El-Qawasmeh, Guest Editor, Jordan University of Science and Technology, Jordan The articles in this issue of The International Journal of Information Technology and Web Engineering are the best among those selected for the 4th International Multiconference on Computer Science and Information Technology CSIT 2006 held in Jordan April 5-7, 2006. The articles in this issue address three important topics: grids, networks, and ontology. RESEARCH PAPERS PAPER ONE: "Hierarchical Scheduling in Heterogeneous Grid Systems" Khaldoon Al-Zoubi, Carleton University, Canada This article proposes hierarchal scheduling schemes for grid systems: A self-discovery scheme for the resource discovery stage and an adaptive child scheduling method for the resource selection stage. In addition, it proposes three rescheduling algorithms: (1) The butterfly algorithm, which reschedules jobs when better resources become available, (2) the fallback algorithm, which reschedules jobs that had their resources taken away from the grid, before the actual resource allocation, and (3) the load-balance algorithm, which balances the load among resources. It also proposes a hybrid system to combine the proposed hierarchal schemes with the well-known peer-to-peer (P2P) principle. The performance of the proposed schemes is compared against the P2P-based grid systems through simulation with respect to a set of predefined metrics. To obtain a copy of the entire article, click on the link below. http://www.idea-group.com/articles/details.asp?id=6627 PAPER TWO: "Object Grouping and Replication on a Distributed Web Server System" Amjad Mahmood, University of Bahrain, Bahrain Taher S. K. Homeed, University of Bahrain, Bahrain Object replication is a well-known technique to improve performance of a distributed Web-server system. This article first presents an algorithm to group correlated Web objects that are most likely to be requested by a given client in a single session so that they can be replicated together, preferably, on the same server. A centralized object replication algorithm is then proposed to replicate the object groups to a cluster of Web-server systems in order to minimize the user's perceived latency, which is subject to certain constraints. Due to the dynamic nature of Web content and users' access patterns, a distributed object replication algorithm also is proposed where each site locally replicates the object groups based on the local access patterns. The performance of the proposed algorithms is compared with three well-known algorithms, and the results are reported. The results demonstrate the superiority of the proposed algorithms. To obtain a copy of the entire article, click on the link below. http://www.idea-group.com/articles/details.asp?id=6628 PAPER THREE: "On a Modified Backoff Algorithm for MAC Protocol in MANETs" Saher S. Manaseer, University of Glasgow, UK Mohamed Ould-Khaoua, University of Glasgow, UK Lewis M. Mackenzie, University of Glasgow, UK In wireless communication environments, backoff is traditionally based on the IEEE binary exponential backoff (BEB). Using BEB results in a high delay in message transmission, collisions, and ultimately wasting the limited available bandwidth. As each node has to obtain medium access before transmitting a message, in dense networks, the collision probability in the medium access control (MAC) layer becomes very high, when a poor backoff algorithm is used. The logarithmic algorithm proposes some improvements to the backoff algorithms that aim to efficiently use the channel and to reduce collisions. The algorithm under study is based on changing the incremental behavior of the backoff value. The BEB is used by the local area networks (LANs) standards, IEEE 802.11, MAC. BEB uses a uniform random distribution to choose the backoff value; this often leads to reducing the effect of a window-sized increment. This paper carries out a deeper study and analysis of the logarithmic backoff algorithm that uses logarithmic increments, instead of an exponential extension of the window size to eliminate the degrading effect of random number distribution. Results from simulation experiments reveal that the algorithm subject under study achieves higher throughput and less packet loss, when in a mobile ad hoc environment. To obtain a copy of the entire article, click on the link below. http://www.idea-group.com/articles/details.asp?id=6629 PAPER FOUR: "FSR Evaluation Using the Suboptimal Operational Values" Osama H. S. Khader, The Islamic University of Gaza, Palestine In mobile ad-hoc networks, routing protocols are becoming more complicated and problematic. Routing in mobile ad-hoc networks is multihop because of the limited communication range of wireless radios. Since nodes in the network can move freely and randomly, an efficient routing protocol is needed for such networks to be able to perform well in such an environment. In this environment, the routing strategy is applied such that it is flexible enough to handle large populations and mobility and is able to minimize the use of the battery. Also it should be designed to achieve maximum packet delivery ratio. Furthermore, the routing protocol must perform well in terms of fast convergence, low routing delay, and low control overhead traffic. In this article, an improved implementation of the fisheye state routing (FSR) protocols is presented, where a new selection routing criteria that utilizes a minimum number of hops is a selection metric. The results obtained from simulation indicate that the fewer number of hops used, the better and more efficient the output for packet delivery ratio was generated To obtain a copy of the entire article, click on the link below. http://www.idea-group.com/articles/details.asp?id=6630 PAPER FIVE: "Engineering Conceptual Data Models from Domain Ontologies: A Critical Evaluation" Haya El-Ghalayini, University of the West of England (UWE), UK Mohammed Odeh, University of the West of England (UWE), UK Richard McClatchey, University of the West of England (UWE), UK This article studies the differences and similarities between domain ontologies and conceptual data models and the role that ontologies can play in establishing conceptual data models during the process of developing information systems. A mapping algorithm has been proposed and embedded in a special purpose transformation engine to generate a conceptual data model from a given domain ontology. Both quantitative and qualitative methods have been adopted to critically evaluate this new approach. In addition, this article focuses on evaluating the quality of the generated conceptual data model elements using Bunge-Wand-Weber and OntoClean ontologies. The results of this evaluation indicate that the generated conceptual data model provides a high degree of accuracy in identifying the substantial domain entities, along with their relationships being derived from the consensual semantics of domain knowledge. The results are encouraging and support the potential role that this approach can take part in the process of information system development. To obtain a copy of the entire article, click on the link below. http://www.idea-group.com/articles/details.asp?id=6631 ***************************************************** For full copies of the above articles, check for this issue of the International Journal of Information Technology and Web Engineering (IJITWE) in your institution's library. If your library is not currently subscribed to this journal, please recommend an IJITWE subscription to your librarian. ***************************************************** CALL FOR PAPERS Mission of IJITWE: The main objective of the journal is to publish refereed papers in the area covering Information Technology (IT) concepts, tools, methodologies, and ethnography, in the contexts of global communication systems and Web engineered applications. In accordance with this emphasis on the Web and communication systems, the journal publishes papers on IT research and practice that support seamless end-to-end information and knowledge flow among individuals, teams, and organizations. This end-to-end strategy for research and practice requires emphasis on integrated research among the various steps involved in data/knowledge (structured and unstructured) capture (manual or automated), classification and clustering, storage, analysis, synthesis, dissemination, display, consumption, and feedback. The secondary objective is to assist in the evolving and maturing of IT-dependent organizations, as well as individuals, in information and knowledge based culture and commerce, including e-commerce. Coverage of IJITWE: Case studies validating Web-based IT solutions Competitive/intelligent information systems Data analytics for business and government organizations Data and knowledge capture and quality issues Data and knowledge validation and verification Human factors and cultural impact of IT-based systems Information filtering and display adaptation techniques for wireless devices Integrated heterogeneous and homogeneous workflows and databases within and across organizations and with suppliers and customers Integrated user profile, provisioning, and context-based processing IT Education and Training IT readiness and technology transfer studies Knowledge structure, classification and search algorithms or engines Metrics-based performance measurement of IT-based and Web-based organizations Mobile, location-aware, and ubiquitous computing Ontology and semantic Web studies Quality of service and service level agreement issues among integrated systems Radio Frequency Identification (RFID) research and applications in web engineered systems Security, integrity, privacy and policy issues Software agent-based applications Strategies for linking business needs and IT Virtual teams and virtual enterprises: communication, policies, operation, creativity, and innovation Web systems architectures, including distributed, grid computer, and communication systems processing Web systems engineering design Web systems performance engineering studies Web user interfaces design, development, and usability engineering studies Interested authors should consult the journal's manuscript submission guidelines at http://www.idea-group.com/ijitwe All inquiries and submissions should be sent to: Ghazi Alkhatib at alkhatib@asu.edu.jo or David Rine at drine@gmu.edu
Received on Monday, 22 January 2007 20:35:27 UTC