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SACMAT
2005
ACM
14 years 4 months ago
Composing and combining policies under the policy machine
As a major component of any host, or network operating system, access control mechanisms come in a wide variety of forms, each with their individual attributes, functions, methods...
David F. Ferraiolo, Serban I. Gavrila, Vincent C. ...
DIGRA
2005
Springer
14 years 4 months ago
Liberal Sims?: Simulated Difference and the Commodity of Social Diversity
This paper outlines how representations of gender, sexuality, race and ethnicity intersect with strategies of late capitalism in The Sims, arguably the most popular video game of ...
A. Brady Curlew
CSCW
2008
ACM
14 years 20 days ago
Asymmetry in media spaces
In any collaborative system, there are both symmetries and asymmetries present in the design of the technology and in the ways that technology is appropriated. Yet media space res...
Amy Voida, Stephen Voida, Saul Greenberg, Helen Ai...
CORR
2010
Springer
130views Education» more  CORR 2010»
13 years 11 months ago
Phase Transitions for Greedy Sparse Approximation Algorithms
A major enterprise in compressed sensing and sparse approximation is the design and analysis of computationally tractable algorithms for recovering sparse, exact or approximate, s...
Jeffrey D. Blanchard, Coralia Cartis, Jared Tanner...
SIAMSC
2010
215views more  SIAMSC 2010»
13 years 9 months ago
A Fast Algorithm for Sparse Reconstruction Based on Shrinkage, Subspace Optimization, and Continuation
We propose a fast algorithm for solving the ℓ1-regularized minimization problem minx∈Rn µ x 1 + Ax − b 2 2 for recovering sparse solutions to an undetermined system of linea...
Zaiwen Wen, Wotao Yin, Donald Goldfarb, Yin Zhang