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DBPL
1995
Springer
106views Database» more  DBPL 1995»
13 years 10 months ago
On Impossibility of Decremental Recomputation of Recursive Queries in Relational Calculus and SQL
We study the problem of maintaining recursively-de ned views, such as the transitive closure of a relation, in traditional relational languages that do not have recursion mechanis...
Guozhu Dong, Leonid Libkin, Limsoon Wong
AAAI
2008
13 years 9 months ago
Using a Geometric-Based Sketch Recognition Approach to Sketch Chinese Radicals
Unlike English, where unfamiliar words can be queried for its meaning by typing out its letters, the analogous operation in Chinese is far from trivial due to the nature of its wr...
Paul Taele, Tracy Hammond
CHI
2005
ACM
13 years 9 months ago
Designing human friendly human interaction proofs (HIPs)
HIPs, or Human Interactive Proofs, are challenges meant to be easily solved by humans, while remaining too hard to be economically solved by computers. HIPs are increasingly used ...
Kumar Chellapilla, Kevin Larson, Patrice Y. Simard...
ACL
2008
13 years 8 months ago
Arabic Morphological Tagging, Diacritization, and Lemmatization Using Lexeme Models and Feature Ranking
We investigate the tasks of general morphological tagging, diacritization, and lemmatization for Arabic. We show that for all tasks we consider, both modeling the lexeme explicitl...
Ryan Roth, Owen Rambow, Nizar Habash, Mona T. Diab...
LREC
2010
119views Education» more  LREC 2010»
13 years 8 months ago
Error Correction for Arabic Dictionary Lookup
We describe a new Arabic spelling correction system which is intended for use with electronic dictionary search by learners of Arabic. Unlike other spelling correction systems, th...
C. Anton Rytting, Paul Rodrigues, Tim Buckwalter, ...