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Search Results: 1 - 10 of 64 matches for " Jalel Akaichi "
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Mobile Information Collectors Trajectory Data Warehouse Design
Wided Oueslati,Jalel Akaichi
International Journal of Managing Information Technology (IJMIT) , 2010,
Abstract: To analyze complex phenomena which involve moving objects, Trajectory Data Warehouse (TDW) seemsto be an answer for many recent decision problems related to various professions (physicians,commercial representatives, transporters, ecologists …) concerned with mobility. This work aims to maketrajectories as a first class concept in the trajectory data conceptual model and to design a TDW, inwhich data resulting from mobile information collectors’ trajectory are gathered. These data will beanalyzed, according to trajectory characteristics, for decision making purposes, such as new productscommercialization, new commerce implementation, etc.
Extending UML for trajectory data warehouses conceptual modelling
Wided Oueslati,Jalel Akaichi
International Journal of Advanced Computer Sciences and Applications , 2012,
Abstract: The new positioning and information capture technologies are able to treat data related to moving objects taking place in targeted phenomena. This gave birth to a new data source type called trajectory data (TD) which handle information related to moving objects. Trajectory Data must be integrated in a new data warehouse type called trajectory data warehouse (TDW) that is essential to model and to implement in order to analyze and understand the nature and the behavior of movements of objects in various contexts. However, classical conceptual modeling does not incorporate the specificity of trajectory data due to the complexity of their components that are spatial, temporal and thematic (semantic). For this reason, we focus in this paper on presenting the conceptual modeling of the trajectory data warehouse by defining a new profile using the StarUML extensibility mechanism
A semantic cache for enhancing Web services communities activities: Health care case Study
Hela Limam,Jalel Akaichi
International Journal of Advanced Computer Sciences and Applications , 2012,
Abstract: Collective memories are strong support for enhancing the activities of capitalization, management and dissemination inside a Web services community. To take advantages of collective memory, we propose an approach for indexing a health care Web services community’s’ resources with semantic annotations explaining and formalizing its informative content. Then we show how the health care Web services community’ members exploit their collective memory by expressing their queries allowing them searching relevant resources in order to perform their activities.
A Survey on Data Warehouse Evolution
Wided Oueslati,Jalel Akaichi
International Journal of Database Management Systems , 2010,
Abstract: The data warehouse (DW) technology was developed to integrate heterogeneous information sources foranalysis purposes. Information sources are more and more autonomous and they often change theircontent due to perpetual transactions (data changes) and may change their structure due to continualusers' requirements evolving (schema changes). Handling properly all type of changes is a must. In fact,the DW which is considered as the core component of the modern decision support systems has to beupdate according to different type of evolution of information sources to reflect the real world subject toanalysis. The goal of this paper is to propose an overview and a comparative study between differentworks related to the DW evolution problem.
A Data Warehouse Assistant Design System Based on Clover Model
Nouha Arfaoui,Jalel Akaichi
International Journal of Database Management Systems , 2010,
Abstract: Nowadays, Data Warehouse (DW) plays a crucial role in the process of decision making. However, theirdesign remains a very delicate and difficult task either for expert or users. The goal of this paper is topropose a new approach based on the clover model, destined to assist users to design a DW. Theproposed approach is based on two main steps. The first one aims to guide users in their choice of DWschema model. The second one aims to finalize the chosen model by offering to the designer views relatedto former successful DW design experiences.
Using Hausdorff Distance for New Medical Image Annotation
Riadh BOUSLIMI,Jalel AKAICHI
International Journal of Database Management Systems , 2012,
Abstract: Medical images annotation is most of the time a repetitive hard task. Collecting old similar annotations and assigning them to new medical images may not only enhance the annotation process, but also reduce ambiguity caused by repetitive annotations. The goal of this work is to propose an approach based on Hausdorff distance able to compute similarity between a new medical image and old stored images. User has to choose then one of the similar images and annotations related to the selected one are assigned to the new one.
Managing and Querying Web Services Communities: A Survey
Hela Limam,Jalel Akaichi
International Journal of Database Management Systems , 2011,
Abstract: With the advance of Web Services technologies and the emergence of Web Services into the informationspace, tremendous opportunities for empowering users and organizations appear in various applicationdomains including electronic commerce, travel, intelligence information gathering and analysis, healthcare, digital government, etc.However, the technology to organize, search, integrate these Web Services has not kept pace with therapid growth of the available information space. The number of Web Services to be integrated may belarge and continuously changing.To ease and improve the process of Web services discovery in an open environment like the Internet, it issuggested to gather similar Web services into groups known as communities.Although Web services are intensively investigated, the community management issues have not beenaddressed yetIn this paper we draw an overview of several Web services Communities’ management approachesbased on some currently existing communities platforms and frameworks. We also discuss differentapproaches for querying and selecting Web services under the umbrella of Web services communities’.We compare the current approaches among each others with respect to some key requirements.
Web Services Synchronization Health Care Application
Jalel Akaichi,Hela Limam
International Journal of Web & Semantic Technology , 2011,
Abstract: This With the advance of Web Services technologies and the emergence of Web Services into theinformation space, tremendous opportunities for empowering users and organizations appear in variousapplication domains including electronic commerce, travel, intelligence information gathering andanalysis, health care, digital government, etc. In fact, Web services appear to be s solution for integratingdistributed, autonomous and heterogeneous information sources. However, as Web services evolve in adynamic environment which is the Internet many changes can occur and affect them. A Web service isaffected when one or more of its associated information sources is affected by schema changes.Changes can alter the information sources contents but also their schemas which may render Web servicespartially or totally undefined. In this paper, we propose a solution for integrating information sources intoWeb services. Then we tackle the Web service synchronization problem by substituting the affectedinformation sources. Our work is illustrated with a healthcare case study.
Adaptation of Web Services to the Context Based on Workflow: Approach for Self-Adaptation of Service-Oriented Architectures to the Context
Faical Felhi,Jalel Akaichi
International Journal of Web & Semantic Technology , 2012,
Abstract: The emergence of Web services in the information space, as well as the advanced technology of SOA, givetremendous opportunities for users in an ambient space or distant, empowerment and organizations invarious fields application, such as geolocation, E-learning, healthcare, digital government, etc.. In fact,Web services are a solution for the integration of distributed information systems, autonomous,heterogeneous and self-adaptable to the context. However, as Web services can evolve in a dynamicenvironment in a well-defined context and according to events automatically, such as time, temperature,location, authentication, etc.. We are interested in improving their SOA to empower the Web services to beself adaptive contexts. In this paper, we propose a new trend of self adaptability of Web services context.Then applying these requirements in the architecture of the platform of adaptability to context “WComp”,by integrating the workflow. Our work is illustrated by a case study of authentication.
Mobile Information Collectors' Trajectory Data Warehouse Design
wided oueslati,jalel akaichi
Computer Science , 2010,
Abstract: To analyze complex phenomena which involve moving objects, Trajectory Data Warehouse (TDW) seems to be an answer for many recent decision problems related to various professions (physicians, commercial representatives, transporters, ecologists ...) concerned with mobility. This work aims to make trajectories as a first class concept in the trajectory data conceptual model and to design a TDW, in which data resulting from mobile information collectors' trajectory are gathered. These data will be analyzed, according to trajectory characteristics, for decision making purposes, such as new products commercialization, new commerce implementation, etc.
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