589 search results - page 45 / 118 » Location-dependent query processing: Where we are and where ... |
COMPGEOM
1994
ACM
13 years 11 months ago
1994
ACM
Ray (segment) shooting is the problem of determining the first intersection between a ray (directed line segment) and a collection of polygonal or polyhedral obstacles. In order t...
SIGMOD
2008
ACM
14 years 7 months ago
2008
ACM
Supporting ranking queries in database systems has been a popular research topic recently. However, there is a lack of study on supporting ranking queries in data warehouses where...
SIGMOD
2011
ACM
12 years 10 months ago
2011
ACM
We study the problem of context-sensitive ranking for document retrieval, where a context is defined as a sub-collection of documents, and is specified by queries provided by do...
ICDE
2010
IEEE
14 years 7 months ago
2010
IEEE
The sciences, business confederations, and medicine urgently need infrastructure for sharing data and updates among collaborators' constantly changing, heterogeneous databases...
DOOD
1995
Springer
13 years 11 months ago
1995
Springer
Abstract. A simple model for method-based authorization is defined and an algorithm is presented for testing in compile-time whether a given database schema violates authorization...