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PODS
2007
ACM
142views Database» more  PODS 2007»
15 years 12 months ago
Quasi-inverses of schema mappings
Schema mappings are high-level specifications that describe the relationship between two database schemas. Two operators on schema mappings, namely the composition operator and th...
Ronald Fagin, Phokion G. Kolaitis, Lucian Popa, Wa...
ISBI
2006
IEEE
16 years 17 days ago
Reconstruction of undersampled dynamic spiral MR images
The temporal resolution of dynamic MRI can be increased by sampling a fraction of k-space in an interleaved fashion, which causes spatial and temporal aliasing. We describe algebr...
Taehoon Shin, Jon F. Nielsen, Krishna S. Nayak
UAI
2008
15 years 1 months ago
Projected Subgradient Methods for Learning Sparse Gaussians
Gaussian Markov random fields (GMRFs) are useful in a broad range of applications. In this paper we tackle the problem of learning a sparse GMRF in a high-dimensional space. Our a...
John Duchi, Stephen Gould, Daphne Koller
HICSS
2007
IEEE
55views Biometrics» more  HICSS 2007»
15 years 6 months ago
Trajectories in Multiple Group Coordination: A Field Study of Hospital Operating Suites
Hospital surgery environments are dynamic and high risk. They require coordination across multiple groups whose incentives, cultures, and routines can conflict. In this paper, we ...
Yuqing Ren, Sara B. Kiesler, Susan R. Fussell, Pet...
ROBIO
2006
IEEE
130views Robotics» more  ROBIO 2006»
15 years 5 months ago
GA-Based Multi-Objective Optimal Design of a Planar 3-DOF Cable-Driven Parallel Manipulator
— The architecture optimization of a three degrees of freedom (3-DOF) planar cable-driven parallel manipulator (CDPM) with multiple objectives has been implemented by means of GA...
Yangmin Li, Qingsong Xu