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CSCW
2012
ACM
12 years 5 months ago
Organizing without formal organization: group identification, goal setting and social modeling in directing online production
A challenge for many online production communities is to direct their members to accomplish tasks that are important to the group, even when these tasks may not match individual m...
Haiyi Zhu, Robert Kraut, Aniket Kittur
ICPR
2000
IEEE
14 years 11 months ago
Grouping of Directional Features Using an Extended Hough Transform
Directional features extracted from Gabor responses are used as primitives for perceptual grouping. In previous work, we extracted Gabor features in 8 directions and then applied ...
María J. Carreira, Majid Mirmehdi, Barry T....
ECAL
1999
Springer
14 years 2 months ago
How Symbiosis Can Guide Evolution
Hinton and Nowlan have demonstrated a model of how lifetime plasticity can guide evolution. They show how acquired traits change the shape of the reward landscape in which subseque...
Richard A. Watson, Jordan B. Pollack
SODA
2003
ACM
133views Algorithms» more  SODA 2003»
13 years 11 months ago
Integrality ratio for group Steiner trees and directed steiner trees
The natural relaxation for the Group Steiner Tree problem, as well as for its generalization, the Directed Steiner Tree problem, is a flow-based linear programming relaxation. We...
Eran Halperin, Guy Kortsarz, Robert Krauthgamer, A...
ICPR
2006
IEEE
14 years 11 months ago
Invariant Features for 3D-Data based on Group Integration using Directional Information and Spherical Harmonic Expansion
Due to the increasing amount of 3D data for various applications there is a growing need for classification and search in such databases. As the representation of 3D objects is no...
Marco Reisert, Hans Burkhardt