This paper intoduces the Scalable INcremental hash-based Algorithm (SINA, for short); a
new algorithm for evaluting a set of concurrent continuous spatio-temporal queries. SINA is …

This paper presents the scalable on-line execution (SOLE) algorithm for continuous and on-
line evaluation of concurrent continuous spatio-temporal queries over data streams …

Time-parameterized queries (TP queries for short) retrieve (i) the actual result at the time that
the query is issued,(ii) the validity period of the result given the current motion of the query …

The tremendous increase in the use of cellular phones, GPS-like devices, and RFIDs results
in highly dynamic environments where objects as well as queries are continuously moving …

Location-aware environments are characterized by a large number of objects and a large
number of continuous queries. Both the objects and continuous queries may change their …

Spatiotemporal objects–that is, objects that evolve over time–appear in many applications.
Due to the nature of such applications, storing the evolution of objects through time in order …

Conventional spatial queries are usually meaningless in dynamic environments since their
results may be invalidated as soon as the query or data objects move. In this paper we …

Spatiotemporal databases are becoming increasingly more common. Typically, applications
modeling spatiotemporal objects need to process vast amounts of data. In such cases …

A desirable feature in spatio-temporal databases is the ability to answer future queries,
based on the current data characteristics (reference position and velocity vector). Given a …

Joins are arguably the most important relational operators. Poor implementations are
tantamount to computing the Cartesian product of the input relations. In a temporal …