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» A Data Model for Effectively Computable Functions
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ICML
2010
IEEE
14 years 11 months ago
Proximal Methods for Sparse Hierarchical Dictionary Learning
We propose to combine two approaches for modeling data admitting sparse representations: on the one hand, dictionary learning has proven effective for various signal processing ta...
Rodolphe Jenatton, Julien Mairal, Guillaume Obozin...
SIAMIS
2008
174views more  SIAMIS 2008»
14 years 9 months ago
Efficient Reconstruction of Piecewise Constant Images Using Nonsmooth Nonconvex Minimization
We consider the restoration of piecewise constant images where the number of the regions and their values are not fixed in advance, with a good difference of piecewise constant val...
Mila Nikolova, Michael K. Ng, Shuqin Zhang, Wai-Ki...
KDD
2009
ACM
227views Data Mining» more  KDD 2009»
15 years 10 months ago
User grouping behavior in online forums
Online forums represent one type of social media that is particularly rich for studying human behavior in information seeking and diffusing. The way users join communities is a re...
Xiaolin Shi, Jun Zhu, Rui Cai, Lei Zhang
CHI
2005
ACM
15 years 10 months ago
A method to standardize usability metrics into a single score
Current methods to represent system or task usability in a single metric do not include all the ANSI and ISO defined usability aspects: effectiveness, efficiency & satisfactio...
Jeff Sauro, Erika Kindlund
ETRA
2010
ACM
221views Biometrics» more  ETRA 2010»
15 years 4 months ago
Advanced gaze visualizations for three-dimensional virtual environments
Gaze visualizations represent an effective way for gaining fast insights into eye tracking data. Current approaches do not adequately support eye tracking studies for three-dimens...
Sophie Stellmach, Lennart Nacke, Raimund Dachselt