Scientific advances in the development of video processing algorithms now allow various distributed and collaborative vision-based applications. However, the lack of recognised standard in this area drives system developers to build specific systems, preventing from e.g. content analysis components upgrade or system reuse in different environments. As a result, the need for a generic, context-i...

Most traditional database systems exploit a record-oriented model where the attributes of a record are placed contiguously in a hard disk to achieve high performance writes. However, for read-mostly data warehouse systems, the column-oriented database has become a proper model because of its superior read performance. Today, flash memory is largely recognized as the preferred storage media for ...

A novel and highly adaptable concept is presented whereby automated warehouses can be built based on a series of simple modules with their inherent feature of scalability and reconfigurability. A potential application example of such a warehousing system is modelled to indicate the level of capability that the concept can provide. Physical infrastructure and operational control events within th...

In recent years the database community has experienced a tremendous increase in the availability of new technologies to support eecient storage and retrieval of large volumes of data, namely data warehousing and On-Line Analytical Processing (OLAP) products. Ef-cient query processing is critical in such an environment , yet achieving quick response times with OLAP queries is still largely an op...

This paper presents an approach of on-line control of the state of technosphere and environment objects based on the integration of Data Warehouse, OLAP and Expert systems technologies. It looks at the structure and content of data warehouse that provides consolidation and storage of monitoring data. There is a description of OLAP-models that provide a multidimensional analysis of monitoring da...

The use of high vacuum for the control of insects seems never to have been considered seriously by the commercial world. The recent development and exploitation by private interests of a vacuum chamber intended for the treatment of certain warehoused commodities as a part of the equipment of a modern storage warehouse has aroused much interest in business circles and has given the writers an op...

Xyleme is a dynamic warehouse for XML data of the Web supporting query evaluation, change control and data integration. We briefly present our motivations, the general architecture and some aspects of Xyleme. The project we describe here was completed at the end of 2000. A prototype has been implemented. This prototype is now being turned into a product by a start-up company also called Xyleme ...

This paper presents a method to reduce I/O cost in MapReduce when online analytical processing (OLAP) queries are used for data analysis. The proposed method consists of two basic ideas. First, to reduce network transmission cost, mappers are organized to receive only data necessary to perform a map task, not an entire set of input data. Second, to reduce storage consumption, only record IDs ar...

ABSTRACT Star schemas are used in data warehouses as the primary storage mechanism for dimensional data that is to be queried efficiently. Star schemas are the final result of the extract, transform, and load (ETL) processes that are used in building the data warehouse. Efficiently building the star schema is important, especially as the data volumes that are required to be stored in the data w...

A data warehouse allows the integration of heterogeneous data sources for identified analysis purposes. The data warehouse schema is designed according to the available data sources and the users' analysis requirements. In order to provide an answer to new individual analysis needs, we previously proposed, in recent work, a solution for on-line analysis personalization. We based our solution on...