Résumé. Les entrepôts de données spatiales et les systèmes Spatial OLAP sont des technologies d’aide à la décision permettant l’analyse en ligne des gros jeux de données géo-référencées. Dans un tel type de systèmes, la qualité de l’analyse dépend : de la qualité des données entreposées, de comment les agrégations sont effectuées, et de comment les données entreposées sont explorées. Dans cet a...

Data Warehouses (DWs), Multidimensional (MD) Databases, and On-Line Analytical Processing Applications are used as a very powerful mechanism for discovering crucial business information. Considering the extreme importance of the information managed by these kinds of applications, it is essential to specify security measures from the early stages of the DW design in the MD modeling process, and ...

Abstract Proppant is one of the major elements a hydraulic fracture process that can influence productivity an oil or gas well. The permeability propped may be determined through laboratory measurements, utilizing experimental relationships, using analytical methods. All methods have their advantages and disadvantages, this study attempts to offers solution combines various achieve practical so...

A data warehouse (DW) is a complex information system primarily used in the decision making process by means of On-Line Analytical Processing (OLAP) applications. Although various methods and approaches have been presented for designing di erent parts of DWs, such as the conceptual and logical schemas or the Extraction-TransformationLoading (ETL) processes, no general and standard method exists...

This paper has proposed a Graph – semantic based conceptual model for semi-structured database system, called GOOSSDM, to conceptualize the different facets of such system in object oriented paradigm. The model defines a set of graph based formal constructs, variety of relationship types with participation constraints and rich set of graphical notations to specify the conceptual level design of...

Fuel assembly bow is a phenomenon that has drawn significant attention over the last decades, due to its role in several issues related nuclear core management. As result, nuclear-based electricity production stakeholders support extensive research on this topic. Recent studies agree various hydraulic forces affecting fuel assemblies their whole height constitute major cause of deformation. Mor...