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In this paper we present the system Ontop-spatial that is able to answer GeoSPARQL queries on top of geospatial relational databases, performing on-the-fly GeoSPARQL-to-SQL translation using ontologie...
Instrumenting programs with code to monitor runtime behavior is a common technique for profiling and debugging. In practice, instrumentation is either inserted manually by programmers, or automaticall...
Given a set P of n uncertain points on the real line, each rep-resented by its one-dimensional probability density function, we consider the problem of building data structures on P to answer range qu...
In the digital world, search engines have been proposed as one of challenging research areas. One of the main issues in search engines studies is query processing, which its aim is to understand user’...
The Cultural Heritage has been usually studied from an objective perspective, using the objective data that can be collected through quantitative methods as the photogrammetry or the topographical mea...
Hand drawn sketches can be used as an aid in spatial queries for identifying spatial relationships. This paper is developing a framework describing the computational methods for solving these queries...
We construct public-key systems that support comparison queries (x > a) on encrypted data as well as more general queries such as subset queries (x in S). These systems also support arbitrary conjunct...
In a private database query system, a client issues queries to a database and obtains the results without learning anything else about the database and without the server learning the query. While pre...
THE IMPACT OF FILTERING ON SPATIAL CONTINUOUS QUERIES.
A SEMANTICS FOR VERSION QUERIES IN GIS DATABASES.
Private data analysis on statistical data has been addressed by many recent literatures. The goal of such analysis is to measure statistical properties of a database without revealing information of i...
The use of information retrieval (IR) systems is evolving towards larger, more complicated queries. Both the IR industrial and research communities have generated significant evidence indicating that ...
Natural language expressions are more familiar to users than choosing keywords for queries. Given that, people can use natural language expressions to represent their sophisticated information needs. ...
Geospatial datasets are typically available as distributed collections contributed by various government or commercial providers. Supporting the diverse needs of various users that may be accessing th...
AbstractThis paper presents a filter-based algorithm called PREDICTOR for optimizing multidimensional K-NN queries in WSN. A filter installed at each sensor node is a node value distribution range. It...

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