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PODS
2011
ACM
238views Database» more  PODS 2011»
14 years 23 days ago
Beyond simple aggregates: indexing for summary queries
Database queries can be broadly classified into two categories: reporting queries and aggregation queries. The former retrieves a collection of records from the database that mat...
Zhewei Wei, Ke Yi
SIGMOD
2011
ACM
193views Database» more  SIGMOD 2011»
14 years 22 days ago
Fast checkpoint recovery algorithms for frequently consistent applications
Advances in hardware have enabled many long-running applications to execute entirely in main memory. As a result, these applications have increasingly turned to database technique...
Tuan Cao, Marcos Antonio Vaz Salles, Benjamin Sowe...
EDBT
2012
ACM
247views Database» more  EDBT 2012»
13 years 9 days ago
Heuristics-based query optimisation for SPARQL
Query optimization in RDF Stores is a challenging problem as SPARQL queries typically contain many more joins than equivalent relational plans, and hence lead to a large join orde...
Petros Tsialiamanis, Lefteris Sidirourgos, Irini F...
AAAI
2012
13 years 9 days ago
A Testbed for Learning by Demonstration from Natural Language and RGB-Depth Video
We are developing a testbed for learning by demonstration combining spoken language and sensor data in a natural real-world environment. Microsoft Kinect RGBDepth cameras allow us...
Young Chol Song, Henry A. Kautz
COMPGEOM
2006
ACM
15 years 3 months ago
Locked and unlocked chains of planar shapes
We extend linkage unfolding results from the well-studied case of polygonal linkages to the more general case of linkages of polygons. More precisely, we consider chains of nonove...
Robert Connelly, Erik D. Demaine, Martin L. Demain...