The present paper introduces two new information merging protocols for the family of adaptive logics ADM, for which majority merging has been defined in [19]. The new adaptive operators reflect the negotiation processes of quasi-merging and pure arbitration, known from the Integrity Constraints framework introduced in [13]. The Adaptive Variant Counting selection provides a result equivalent to...

The last few years have seen an increasing trend to use database technology in more innovative and diverse application domains which places even greater demands on DBMS for accuracy of information. The provision of correct and reliable data is therefore of vital importance and systems for integrity enforcement crucial. At the same time, as systems become more sophisticated, the sheer number and...

This paper’s approach to semantic integrity management is that in order to maintain an integrity constraint, some variables of the constraint may be operated on while others may not This defines integrity dependencies between vsiables. Various examples of integrity dependencies and their meanings are discussed. In addition to corresponding to real world practice, integrity dependencies can be u...

Computees are abstractions of the entities that populate global and open computing environments. The societies that they populate give an institutional meaning to their interactions and define the allowed interaction protocols. Social integrity constraints represent a powerful though simple formalism to express such protocols. Using social integrity constraints, it is possible to give a formal ...

Data quality is critical to data analysis because bad data can lead to incorrect conclusions. Problems with data are best detected early, before too much time and eeort are spent ingesting and analyzing it. In this paper, we propose the use of data mining techniques for the automatic detection of data problems commonly encountered in large multivariate data sets. Data mining methods are ideal f...

The past few years have witnessed the emergence of collaborative commerce (c-commerce), which is an informationtechnology-enabled process for organizations to share data and resources, to adjust their activities, and to augment each other’s capabilities in order to reap mutual benefit. Data quality has long been a problem that compromises the potential of information systems, and assuring the d...

identification of rapid degradation of ecological resources requires effective environmental monitoring including ecological integrity assessment .our first aim is to analyze ecological integrity in a landscape context while developing a method to assess integrity in spite of a dearth of historical data. we used a spatial-temporal reference framework for land cover maps for assessing ecological...

A data warehouse consists of a set of materialized views that contain derived data from several data sources. Materialized views are beneficial because they allow efficient retrieval of summary data. However, materialized views need to be refreshed periodically in order to avoid staleness. During a materialized view refresh only changes to the base tables are transmitted from the data sources t...