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CCS
2010
ACM
13 years 8 months ago
Attacks and design of image recognition CAPTCHAs
We systematically study the design of image recognition CAPTCHAs (IRCs) in this paper. We first review and examine all IRCs schemes known to us and evaluate each scheme against th...
Bin B. Zhu, Jeff Yan, Qiujie Li, Chao Yang, Jia Li...
ICDE
2007
IEEE
146views Database» more  ICDE 2007»
14 years 9 months ago
Conditional Functional Dependencies for Data Cleaning
We propose a class of constraints, referred to as conditional functional dependencies (CFDs), and study their applications in data cleaning. In contrast to traditional functional ...
Philip Bohannon, Wenfei Fan, Floris Geerts, Xibei ...
WWW
2007
ACM
14 years 8 months ago
Expertise networks in online communities: structure and algorithms
Web-based communities have become important places for people to seek and share expertise. We find that networks in these communities typically differ in their topology from other...
Jun Zhang, Mark S. Ackerman, Lada A. Adamic
SOSP
2007
ACM
14 years 4 months ago
Triage: diagnosing production run failures at the user's site
Diagnosing production run failures is a challenging yet important task. Most previous work focuses on offsite diagnosis, i.e. development site diagnosis with the programmers prese...
Joseph Tucek, Shan Lu, Chengdu Huang, Spiros Xanth...
CHI
2009
ACM
14 years 2 months ago
O' game, can you feel my frustration?: improving user's gaming experience via stresscam
One of the major challenges of video game design is to have appropriate difficulty levels for users in order to maximize the entertainment value of the game. Game players may lose...
Chang Yun, Dvijesh Shastri, Ioannis Pavlidis, Zhig...