Location-based services (LBS) have been widely accepted by mobile users. Many LBS
users have direction-aware search requirement that answers must be in the search …

In this paper, we study a novel form of continuous nearest neighbor queries in the presence
of obstacles, namely continuous obstructed nearest neighbor (CONN) search. It considers …

Reverse nearest neighbor (RNN) queries have a broad application base such as decision
support, profile-based marketing, resource allocation, etc. Previous work on RNN search …

Grid computing is moving into two ways. The Computational Grid focuses on reducing
execution time of applications that require a great number of computer processing cycles …

In many applications involving spatial objects, we are only interested in objects that are
directly visible from query points. In this paper, we formulate the visible k nearest neighbor …

In this paper, we identify and solve a new type of spatial queries, called continuous visible
nearest neighbor (CVNN) search. Given a data set P, an obstacle set O, and a query line …

In this paper, we identify and solve a new type of spatial queries, called continuous visible
nearest neighbor (CVNN) search. Given a data set P, an obstacle set O, and a query line …

Location-based recommendation services recommend objects to the user based on the
user's preferences. In general, the nearest objects are good choices considering their spatial …

In this paper, we study a novel variant of obstructed nearest neighbor queries, namely,
range-based obstructed nearest neighbor (RONN) search. A natural generalization of …

Continuous K-nearest neighbor (CKNN) queries on moving objects retrieve the K-nearest
neighbors of all points along a query trajectory. They mainly deal with the moving objects …