Publication - Revisiting the Partial Datacube Materialization E-mail
Publications

Revisiting the Partial Datacube Materialization

Authors : Hanusse, Nicolas;Maabout, Sofian;Tofan, Radu

Conf : 15th East-European Conference on Advances in Databases and Information Systems (ADBIS 2011), Vienne, Autriche (2011)

Web : http://link.springer.com/chapter/10.1007%2F978-3-642-23737-9_6

The problem of selecting views and/or indexes to materialize has been extensively studied in the context of query optimization. Traditionally, the problem is formalized as follows: given a set of queries and a budget e.g., an available memory space, find the objects to materialize (views and/or indexes) that (1) satisfy the given budget and (2) minimize the query cost. In this paper, we depart from this setting by adopting a user-centric point of view: given a constraint on query evaluation, namely a maximal query cost the user does accept, find the objects (1) whose materialization needs the minimal storage space and (2) that guarantee the query evaluation constraint. We study this problem in the data cube setting and provide exact and approximate solutions.

 
Publication - Dépendances Fonctionnelles et Matérialisation Partielle des Cubes de Données E-mail
Publications

Dépendances Fonctionnelles et Matérialisation Partielle des Cubes de Données

Authors : Garnaud E., Maabout S., Mosbah M.

Conf : Entrepôts de Données et Analyse en ligne (EDA?11),Clermont-Ferrand France (2011)

Web :

 
Publication - An Architecture for Interoperability of Enterprise Information E-mail
Publications

An Architecture for Interoperability of Enterprise Information

Authors : Song F., Zacharewicz G., Chen D.

Conf : 13th International Conference on Enterprise Information Systems (ICEIS), Chine (2011)

Web : http://hal.archives-ouvertes.fr/hal-00601272

 
Publication - Harmonized and Reversible development framework for HLA based E-mail
Publications

Harmonized and Reversible development framework for HLA based

Authors : Tu Z., Zacharewicz G., Chen D

Conf : Symposium On Theory of Modeling and Simulation (DEVS/TMS'11), États-Unis (2011)

Web : http://hal.archives-ouvertes.fr/hal-00584588

This paper aims at improving the re-implementation of existing information systems when they are reused in a system of systems, i.e. a federation of enterprise information systems that interoperate. The idea is adapting the local experiences, coming from the development of the original information system, to be part of a HLA process, thanks to Model Discovery and Ontological approach. This paper will propose a new bi-directional development life cycle. In the first way, MDA (Model Driven Architecture) and HLA FEDEP (Federation Development and Execution Process) will be harmonized to implement distributed information systems from enterprise models. Conversely, model discovery will be used to help re-implement existing systems, in order to be interoperable without being fully reconstructed. Then, according to HLA 1516 evolved new features, this paper will propose a solution based on an open source RTI, PORTICO, to implement web enable federates.

 
Publication - Harmonized and Reversible Development Framework for HLA Based Interoperable Application E-mail
Publications

Harmonized and Reversible Development Framework for HLA Based Interoperable Application

Authors : Tu Z., Zacharewicz G., Chen D., Zhang Z

Journal : The 7th International Mediterranean and Latin American Modelling Multiconference, Morocco (2010)

Web : http://hal.archives-ouvertes.fr/hal-00514556

This paper aims at improving the re-implementation of existing information systems when they are called to be involved in a system of systems, i.e. a federation of enterprise information systems that interoperate. The idea is reusing the local experiences coming from the development of the original information system with the process of Model Discovery and Ontological approach. We draw the strong points of MDA and HLA, former in transforming concepts and models from the conceptual level to the implementation and latter in implementation of distributed systems, then we propose a MDA/HLA framework to implement distributed enterprise models from the conceptual level of federated enterprise interoperability approach. In addition, we propose a model reversal methodology to help re-implement the legacy information system, in order to achieve the interoperability with other systems. We also draw the strong points from web services in order to improve the performance of HLA in distribute simulation.