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CCS
2010
ACM
15 years 9 months ago
Scene tagging: image-based CAPTCHA using image composition and object relationships
In this paper, we propose a new form of image-based CAPTCHA we term "scene tagging". It tests the ability to recognize a relationship between multiple objects in an imag...
Peter Matthews, Cliff Changchun Zou
ICIA
2007
15 years 8 months ago
Modeling Human-Agent Interaction with Active Ontologies
As computer systems continue to grow in power and access more networked content and services, we believe there will be an increasing need to provide more user-centric systems that...
Didier Guzzoni, Charles Baur, Adam Cheyer
ATAL
2008
Springer
15 years 8 months ago
The permutable POMDP: fast solutions to POMDPs for preference elicitation
The ability for an agent to reason under uncertainty is crucial for many planning applications, since an agent rarely has access to complete, error-free information about its envi...
Finale Doshi, Nicholas Roy
CCS
2008
ACM
15 years 8 months ago
A class of probabilistic models for role engineering
Role Engineering is a security-critical task for systems using role-based access control (RBAC). Different role-mining approaches have been proposed that attempt to automatically ...
Mario Frank, David A. Basin, Joachim M. Buhmann
WICON
2008
15 years 7 months ago
A graph based routing algorithm for multi-hop cognitive radio networks
Cognitive radio networks that allow dynamic spectrum access are considered spectrally more efficient than networks using fixed spectral allocation. These networks are characterize...
Yogesh Reddy Kondareddy, Prathima Agrawal