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SIGIR
2010
ACM
15 years 10 months ago
Query recovery of short user queries: on query expansion with stopwords
User queries to search engines are observed to predominantly contain inflected content words but lack stopwords and capitalization. Thus, they often resemble natural language que...
Johannes Leveling, Gareth J. F. Jones
AIRS
2006
Springer
15 years 10 months ago
Improving Re-ranking of Search Results Using Collaborative Filtering
Search Engines today often return a large volume of results with possibly a few relevant results. The notion of relevance is subjective and depends on the user and the context of ...
U. Rohini, Vamshi Ambati
FOCS
2004
IEEE
15 years 10 months ago
Hardness of Approximating the Shortest Vector Problem in Lattices
Let p > 1 be any fixed real. We show that assuming NP RP, there is no polynomial time algorithm that approximates the Shortest Vector Problem (SVP) in p norm within a constant ...
Subhash Khot
SI3D
1995
ACM
15 years 10 months ago
RING: A Client-Server System for Multi-User Virtual Environments
This paper describes the client-server design, implementation and experimental results for a system that supports real-time visual interaction between a large number of users in a...
Thomas A. Funkhouser
SIGGRAPH
1995
ACM
15 years 10 months ago
Applications of irradiance tensors to the simulation of non-Lambertian phenomena
We present new techniques for computing illumination from non-diffuse luminaires and scattering from non-diffuse surfaces. The methods are based on new closed-form expressions d...
James Arvo