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International Review
on Computers and Software -
January 2007
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on Computers and Software -
November 2006
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on Computers and Software -
September 2006
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July 2006
International Review on
Computers and Software - Papers
Towards a Practical and Valid Model for Assessing Quality of Information on the
Web
by M. J. Kargar, A. R. Ramli, H. Ibrahim, S. B. Noor
Abstract
- Information quality (IQ) on the web has become a critical concern of
organizations and individuals. The growth of data warehouses and the direct
access of information from various sources on the web by managers and
information users have increased the need for, and awareness of, high quality
information. Yet, despite a decade of active research, Information quality lacks
comprehensive methodology for its assessment and improvement and a few
researches have presented practical way for measuring IQ criteria. This paper
attempts to address some of the issues involved in information quality by
classifying and discussing a wide ranging set of quality of information
frameworks. In our classification, we consider three origins: criteria, models
and validation methods of the models and criteria. This classification prepares
a bed for developing practical and at the same time valid information quality
model.
Copyright © 2007 Praise Worthy Prize S.r.l. - All rights reserved
Keywords:
Information quality, Information quality assessment, Information quality model,
Web quality, quality metric.
Proactive Cyber Defense and Reconfigurable Framework for Cyber Security
by H. Saini, D. Saini
Abstract
-
Defense of online
information in today’s time is much critical due to the attacks of different
malicious objects such as virus, worm, Trojans, spam, malwares, etc. Every one
should at prime importance to consider the implementation of proper cyber
security methods such as firewalls, encryptions, cryptography, biometrics,
digital certificates, proxy servers, intrusion detectors, etc. to ensure that
all their online information is secured. In this paper, we present a framework
for cyber defense after analyzing all the possible aspects of the cyber space.
This framework is implemented and found suitable in many aspects such as good
sensory features, flexibility, extensibility, reconfigurable, economic, and user
friendly. The paper also gives a methodology for implementing the framework in
an enterprise/organization having already existing cyber defense system.
Copyright © 2007 Praise Worthy Prize S.r.l. - All rights reserved
Keywords:
Cyber defense, Cyber space, Cyber defense framework, Cyber attack.
Personalizing Information Retrieval in a Distributed Environment
by S. Kechid, L. Tamine-Lechani, M. Boughanem, H. Drias
Abstract
- Information personalization is the process of enhancing an information seeking
process with user preferences in order to provide accurate results in response
to a user query. The underlying idea is that different users have different
backgrounds, goals and interests when seeking information and so a same query
may cover different specific information needs according to who emitted it. In
this paper, we address information personalization in a distributed environment.
Most prior research in distributed information access focused on selecting and
merging information that have the most relevant content according to the query
but ignored the user’s specific needs. With the ever expanding Web, users are
faced with a huge number of information resources; consequently, such
query-based information access strategies lead to inaccurate query results. In
order to tackle this problem, we propose (a) models for representing both user
and information source using feature based profiles (b) algorithms for source
selection and results merging that personalize the computation of the relevance
score of a document in response to the user’s query.
The proposed personalization approach has been experimented using a multi-agent
based framework dealing with several known search engines. The experimental
results obtained show the effectiveness of our approach.
Copyright © 2007 Praise Worthy Prize S.r.l. - All rights reserved
Keywords:
Distributed information retrieval, user profile, source profile, source
selection, result merging and multi-agent system.
A Reliable Image Retrieval System Based on Spatial Disposition Graph Matching
by E. Zagrouba, S. Ouni, W. Barhoumi
Abstract
- Content-based retrieval of multimedia information is one of the most difficult
research topics in multimedia computing and information retrieval. However, the
domain of image retrieval is still an open problem in comparison with the
obtained results in the domain of text retrieval. In this paper, we present a
reliable approach for image indexing and retrieval mainly based on the spatial
positions of significant regions extracted from the studied images, in order to
reduce the semantic gap between the query image and the retrieved ones. For
modelling spatial configuration, we propose a novel graph-based data structure
that we called Partial Graph of Relative Spatial Relations (PGRSR). The proposed
graph can be considered as a better candidate for modelling semantically rich
data. It permits to describe the degree of relative positioning between the
significant regions not necessary adjacent. Thus, the image retrieval will
consist principally to the resolution of a graph matching problem. For this, we
present a novel algorithm of graph matching while proposing a measure of
similarity between graphs allowing the ranking of the retrieved images. Besides,
we combine both text and image features for image indexing and retrieval in
order to more reduce the semantic gap. The efficiency of the proposed approach
is illustrated while studying many scenarios on two different databases. The
first database is homogenous and contains 120 images (composed of 560 regions)
of countries flags. The second database contains 600 heterogeneous images
(composed of 3220 regions) of diverse real-world indoor and outdoor scenes. The
promising recorded results were evaluated while using the precision and recall
assessment criteria.
Copyright © 2007 Praise Worthy Prize S.r.l. - All rights reserved
Keywords:
Graph of Relative Spatial Relations, Image Indexing and Retrieval, Matching,
Regions Segmentation, Textual Keywords.
by R. Bhatia, M. Dave, R. C. Joshi
Abstract
- A component retrieval system must satisfy stringent timing constraints when
applied to distributed repositories. As the size of component repositories
increases, the efficiency of the retrieval system becomes a pressing concern.
Instead of performing a dedicated and manual search, we propose to delegate this
task to mobile agents, a paradigm that provides an efficient solution in terms
of dealing with the objects in a network. Mobile agents can be used for
effective and efficient software component retrieval from distributed
repositories. It reduces resource usage at developers ease. Our model employs
mobile agent to carry user query to various servers on the network, searches the
candidate components in all repositories and informs user via email. Component
search is based on weights carried by various component descriptions in formal
specifications using Z. A tool has been developed and verified using Aglet
Software Development Kit (ASDK version Aglets 1.1b3 by IBM) and javamail 1.3 &
jaf 1.0.2.
Copyright © 2007 Praise Worthy Prize S.r.l. - All rights reserved
Keywords:
Formal Specifications, Mobile Agent, Reusable Libraries, And Reusable Models.
Multidimensional Pattern Construction and Logical Reuse for the Design of Data
Marts
by J. Feki, H. Ben-Abdallah
Abstract
- Design patterns have demonstrated their advantages in accelerating the
development of complex systems. These advantages motivated us to investigate
their integration in the design of decisional systems. As a result of our
investigation, we propose a method for data mart (DM) design, based on the reuse
of multidimensional patterns (MP). These latter are multidimensional schemas
that represent typical, analytical requirements in a given domain. In addition,
MP are generic, i.e., independent of a particular operational information
system. An MP can be adapted by a decision-maker through a set of reuse
operations to derive a DM schema. Furthermore, to provide for this DM design
approach, we have developed a method for the construction of MP.
Copyright © 2007 Praise Worthy Prize S.r.l. - All rights reserved
Keywords:
Design pattern, Multidimensional pattern, Data mart design, Logical pattern
instantiation.
Intelligent Data Bases for an Effective Industrial Maintenance Management: the
Autonomous Agents ConWorm of CONRAD System
by B. Sid Ahmed, B. Hafida
Abstract
- The goal of this paper is to introduce an information system management model
dedicated to the industrial maintenance and represented by an "intelligent" data
base where autonomous agents will transform information to strategic knowledge
referring to space-time. Their first role is to allow through a “reversed
feedback” to analyze information in entry of the system and to propose a control
ensuring system protection against not representative or erroneous information.
Their second role is to make it possible to propose at exit strongly correlated
strategic variables regroupings and through these last the management tasks
regrouping per "management categories". Lastly, we will describe the information
system which we called CONRAD and the autonomous agents that we called ConWorm,
dedicated to the task of transformation and control.
Copyright © 2007 Praise Worthy Prize S.r.l. - All rights reserved
Keywords:
Autonomous agent, industrial management, Human Computer Interaction.
Towards a Graphical
Querying Language for XML
by I. Amous, A. Jedidi, F. Gargouri, F. Sèdes
Abstract
- In this paper, we propose our approach of graphical querying based on the
spatio-temporal metadata. This proposition improves information retrieve and
presents documents suitable to the user’s needs. We propose the extension of the
XQuery language by new operators integrated in its initial grammar, called
XQuery++. We present more examples of XQuery++ queries using spatio-temporal
operators. Our extension is validated in a prototype called GXQuery++, designed
by UML. In the end, an evaluation of our metadata use in queries is given.
Copyright © 2007 Praise Worthy Prize S.r.l. - All rights reserved
Keywords:
Metadata, graphical querying, XQuery++, spatio-temporal operators, GXQuery++.
Augmented Reality as a Design Tool for Maintenance Applications
by N. Zenati, N. Zerhouni
Abstract
- One of the main weaknesses with traditional computing is the fact that the
numerical world of the computer is decoupled from the user’s real world. The
application of Augmented Reality (AR) can provide interactive systems in which
real objects and computer data are combined in a cohesive way. This new paradigm
has many potential applications in various fields, in particular in the
maintenance domain. It allows the user to see computer generated virtual objects
superimposed to the real world through the see-through Head Mounted Display (HMD).
The technician of maintenance, when using this system, can interact with the
virtual world and have additional information, such as instruction for
performing maintenance tasks in form of text messages, images, 3-D models of
pieces or audio such as speech instruction.
In this paper, we propose a design process of the maintenance system focused on
the analysis of the interaction between the user, the system and the real world.
This area is based on the UML notation. The use of UML represents our ergonomic
and software design process basis for AR systems. This process also is based on
ergonomic characteristics study within a UML system description and on the
hybrid PAC-Amodeus model architecture adaptation for the AR systems.
Copyright © 2007 Praise Worthy Prize S.r.l. - All rights reserved
Keywords:
Augmented reality, maintenance, Human-Computer-Interaction, V-model, PAC-Amodeus
architecture.
Modeling and Simulation of Multi-Agents Reactive Decisional Systems Using
Business Process Management Concepts
by M. Berrada, B. Bounabat, M. Harti
Abstract
- A Reactive system is one that is in continual interaction with its
environment, and executes at a pace determined by that environment. Due to their
complex nature, reactive systems are extremely difficult to specify and
validate. In this paper, we propose a new approach for modeling for such systems
using Business Process Modeling Notation BPMN. This approach allows also the
simulation of processes achieved by agents composing such systems using the
Business Process Execution Language for Web Services BPEL4WS.
Copyright © 2007 Praise Worthy Prize S.r.l. - All rights reserved
Keywords:
Agent, BPEL4WS, BPMN, Modeling, Reactive systems, Simulation.
Abstractions with Strong Preservation of Concurrent Systems
by M. Bourahla
Abstract
- In this paper, we present a method to generate strongly preserving
abstractions for model checking concurrent systems. The concurrent system which
can be infinite, is first described by a program using a defined syntax and
semantics. This program is abstracted using the framework of abstract
interpretation where an abstract function will be given. This abstract program
is demonstrated to be an accurate approximation of the original program which
may contain spurious behaviors. These spurious behaviors will be identified and
removed using a new defined abstraction framework based on the restrictions. The
new produced abstract program is an exact approximation of the original program.
Copyright © 2007 Praise Worthy Prize S.r.l. - All rights reserved
Keywords:
Model Checking, Abstractions, Concurrent Systems.
An Approach of Flat Heterogeneous Modeling Based on Heterogeneous Interface
Components
by A. M. Mbobi, F. Boulanger, M. Feredj
Abstract
- Data processing applications are increasingly heterogeneous, mixing different
technical domains such as telecommunications, digital and analog electronics,
signal processing algorithms, etc. These domains have different methods of
modeling and design that consider their components and relationships in
different ways. To mix these different domains, modeling languages and platforms
generally use a hierarchical approach where the hierarchy of the model is
coupled to the change of model of computation. Moreover, heterogeneous
components cannot be used and what happens when data crosses the boundary
between two domains depends on the modeling environment.
This paper presents a flat heterogeneous modeling approach that solves these
issues by using Heterogeneous Interface Components, which gives more control to
the designer on the semantics of the interactions between models of computation.
Copyright © 2007 Praise Worthy Prize S.r.l. - All rights reserved
Keywords:
Heterogeneity, Embedded Systems, Modeling, Design, Model of Computation.
A Method to
Incorporate Negative Value into a Trust Model
by F. Azimzadeh, S. Khatun, B. M. Ali
Abstract
- Trust is an important issue for security. Trust issues influence not only the
specification of security policies but also the techniques needed to manage and
implement security policies for systems. Certification is one of the main
components trust models. Traditional trust model did not consider revocation of
certification, but usually revocation happens. Maurer’s trust model has been
used by most researches. The model including two parts: deterministic and
probabilistic model. In this paper we have used a tailored form of “credential
networks” to incorporate revocation statues in deterministic model. By
incorporating revocation, we have omitted the path of trust include the
certification revocation in the probabilistic model.
Copyright © 2007 Praise Worthy Prize S.r.l. - All rights reserved
Keywords:
Trust model, Certification, Revocation, PKI.
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