*Ingenierías y Ciencias de la Computación (Proyecto VLIR): Recent submissions

  • Data Warehouse Design to Support Customer Relationship Management Analyses 
    Cunningham Colleen; Chen Peter P (2004)
    CRM is a strategy that integrates the concepts of Knowledge Management, Data Mining, and Data Warehousing in order to support the organization's decision-making process to retain long-term and profitable relationships with ...
  • Constructing Search Spaces for Materialized View Selection 
    Theodoratos Dimitri; Xu Wugang (2004)
    Deciding which views to materialize is an important problem in the design of a Data Warehouse. Solving this problem requires generating a space of candidate view sets from which an optimal or near-optimal one is chosen for ...
  • A New OLAP Aggregation Based on the AHC Technique 
    Riadh Ben; Messaoud; Boussaid Omar; Rabasédarabas´rabaséda Sabine (2004)
    Nowadays, decision support systems are evolving in order to handle complex data. Some recent works have shown the interest of combining on-line analysis processing (OLAP) and data mining. We think that coupling OLAP and ...
  • Physical Modeling of Data Warehouses using UML 
    Luján-Mora Sergio; Trujillo Juan (2004)
    During the few last years, several approaches have been proposed to model different aspects of a Data Warehouse (DW), such as the conceptual model of the DW, the design of the ETL (Extraction, Transformation, Loading) ...
  • On Querying Versions of Multiversion Data Warehouse * 
    Morzy Tadeusz; Wrembel Robert (2004)
    A data warehouse (DW) is fed with data that come from external data sources that are production systems. External data sources, which are usually autonomous, often change not only their content but also their structure. ...
  • Evaluating XML-Extended OLAP Queries Based on a Physical Algebra 
    Yin Xuepeng; Pedersen Torben Bach (2004)
    In today's OLAP systems, integrating fast changing data, e.g., stock quotes, physically into a cube is complex and time-consuming. The widespread use of XML makes it very possible that this data is available in XML format ...
  • Aggregate Queries in Peer-to-Peer OLAP 
    Espil Mauricio Minuto; Vaisman Alejandro A (2004)
    A peer-to-peer (P2P) data management system consists essentially of a network of peer systems, each maintaining full autonomy over its own data resources. Data exchange between peers occurs when one of them, in the role ...
  • Beyond Data Warehousing: What's Next in Business Intelligence? Iuris Cella 
    Golfarelli Matteo; Rizzi Stefano; Formula Gruppo; S; Matteotti A Via (2004)
    During the last ten years the approach to business management has deeply changed, and companies have understood the importance of enforcing achievement of the goals defined by their strategy through metrics-driven management. ...
  • An Analysis of Additivity in OLAP Systems 
    Horner John; Chen Peter P (2004)
    Accurate summary data is of paramount concern in data warehouse systems; however, there have been few attempts to completely characterize the ability to summarize measures. The sum operator is the typical aggregate operator ...
  • Handling Big Dimensions in Distributed Data Warehouses using the DWS Technique 
    Costa Marco; Madeira Henrique (2004)
    The DWS (Data Warehouse Striping) technique allows the distribution of large data warehouses through a cluster of computers. The data partitioning approach partition the facts tables through all nodes and replicates the ...
  • Attribute Value Reordering for Efficient Hybrid OLAP 
    Kaser Owen; Lemire Daniel (2003)
    The normalization of a data cube is the process of choosing an ordering for the attribute values, and the chosen ordering will affect the physical storage of the cube's data. For large multidimensional arrays, proper ...
  • Maintenance Policy Selection in Heterogeneous Data Warehouse Environments: A Heuristics-based Approach 
    Engströmengstr¨engström H; Chakravarthy S; Lings B (2003)
    This work addresses data warehouse maintenance, i.e. how changes to autonomous, heterogeneous, and distributed sources should be detected and propagated to a warehouse. The research community has mainly addressed issues ...
  • Using AutoMed Metadata in Data Warehousing Environments 
    Fan Hao; Poulovassilis Alexandra (2003)
    What kind of metadata can be used for expressing the mul-tiplicity of data models and the data transformation and integration processes in data warehousing environments? How can this metadata be further used for supporting ...
  • Implementing Operations to Navigate Semantic Star Schemas 
    Abelí Alberto; Samos Joséjos´josé; Saltor F ` Elix (2003)
    In the last years, lots of work have been devoted to multidi-mensional modeling, star shape schemas and OLAP operations. However, " drill-across " has not captured as much attention as other operations. This operation ...
  • Hierarchical Dwarfs for the Rollup Cube 
    Sismanis Yannis; Deligiannakis Antonios; Kotidis Yannis; Roussopoulos Nick (2003)
    The data cube operator exemplifies two of the most important aspects of OLAP queries: aggregation and dimension hierarchies. In earlier work we presented Dwarf, a highly compressed and clustered structure for creating, ...
  • XCube – XML For Data Warehouses 
    Hümmer Wolfgang; Bauer Andreas; Harde Gunnar (2003)
    Data warehouse systems are nowadays a well known and widely spread approach for supporting management decisions. In several companies or even across companies the idea of integrating several data warehouses into a virtual ...
  • Spatial Hierarchy and OLAP-Favored Search in Spatial Data Warehouse 
    Rao Fangyan; Zhang Long; Yu Lan; Li Ying; Chen Ying (2003)
    Data warehouse and Online Analytical Processing(OLAP) play a key role in business intelligent systems. With the increasing amount of spatial data stored in business database, how to utilize these spatial information to get ...
  • Advanced Visualization for OLAP 
    Maniatis Andreas S; Vassiliadis Panos; Skiadopoulos Spiros; Vassiliou Yannis (2003)
    Data visualization is one of the big issues of database research. OLAP as a decision support technology is highly related to the developments of data visualization area. In this paper we demonstrate how the Cube Presentation ...
  • DSQoS -Distributed Architecture Providing QoS in Summary Warehouses 
    Costa João Pedro; Furtado Pedro (2003)
    Data warehouses (DW) that store enormous quantities of data put a major challenge in what concerns performance and scalability, as users request instant answers to their queries. Traditional solutions rely on very expensive ...
  • Achieving Adaptivity for OLAP-XML Federations 
    Pedersen Dennis; Pedersen Torben Bach (2003)
    Motivated by the need for more flexible OLAP systems, this paper presents work on logical integration of external data in OLAP databases, carried out in cooperation between the Danish OLAP client vendor TARGIT and Aalborg ...

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