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CHI
2009
ACM
16 years 7 months ago
Evaluating existing audio CAPTCHAs and an interface optimized for non-visual use
Audio CAPTCHAs were introduced as an accessible alternative for those unable to use the more common visual CAPTCHAs, but anecdotal accounts have suggested that they may be more di...
Jeffrey P. Bigham, Anna Cavender
CHI
2009
ACM
16 years 7 months ago
Wetpaint: scraping through multi-layered images
We introduce a technique for exploring multi-layered images by scraping arbitrary areas to determine meaningful relationships. Our system, called Wetpaint, uses perceptual depth c...
Hiroshi Ishii, Jürgen P. Schulze, Leonardo Bo...
CHI
2009
ACM
16 years 7 months ago
Real life challenges in access-control management
In this work we ask the question: what are the challenges of managing a physical or file system access-control policy for a large organization? To answer the question, we conducte...
Lujo Bauer, Lorrie Faith Cranor, Robert W. Reeder,...
KDD
2003
ACM
217views Data Mining» more  KDD 2003»
16 years 7 months ago
Algorithms for estimating relative importance in networks
Large and complex graphs representing relationships among sets of entities are an increasingly common focus of interest in data analysis--examples include social networks, Web gra...
Scott White, Padhraic Smyth
CHI
2008
ACM
16 years 7 months ago
Friends and foes: ideological social networking
Traditional online social network sites use a single monolithic "friends" relationship to link users. However, users may have more in common with strangers, suggesting t...
Gábor Szabó, Michael J. Brzozowski, ...