Data warehouses and OLAP systems help to analyze complex multidimensional data and provide decision support. With the availability of large amounts of spatial data in recent years, several new models have been proposed to enable the integration of spatial data in data warehouses and to help analyze such data. This is often achieved by a combination of GIS and spatial analysis tools with OLAP an...

An approach for organizing the information in the data warehouses is presented in the paper. The possibilities of the numbered information spaces for building data warehouses are discussed. An application is outlined in the paper.

The purpose of data warehouses is to enable business analysts to make better decisions. Over the years the technology has matured and data warehouses have become extremely successful. As a consequence, more and more data has been added to the data warehouses and their schemas have become increasingly complex. These systems still work great in order to generate pre-canned reports. However, with ...

The maintenance of data warehouses is becoming an increasingly important topic due to the growing use, derivation and integration of digital information. Most previous work has dealt with one centralized data warehouse (DW) only. In this paper, we now focus on environments with multiple data warehouses that are possibly derived from other data warehouses. In such a large-scale environment, data...

the aim of this study was to investigate the effect of focus of attention on learning dart throwing in mentally retarded children.in this quasi-experimental study, 22 mentally retarded boys (age 10-12 years old) were randomly selected according to iq (50-70) and were assigned to two homogenous attention (internal, external) groups after the pretest and a training session according to the obtain...

Many data warehouses contain massive amounts of data and grow rapidly. Examples include warehouses with retail sales data capturing customer behavior and warehouses with click-stream data capturing user behavior on web sites. The sheer size of these warehouses makes them increasingly hard to manage and query efficiently. As time passes, old, detailed data in the warehouses tend to become less i...