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» Classifying Problems into Complexity Classes
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FGCS
2000
81views more  FGCS 2000»
15 years 6 months ago
Managing the operator ordering problem in parallel databases
This paper focuses on parallel query optimization. We consider the operator problem and introduce a new class of execution strategies called Linear-Oriented Bushy Trees (LBTs). Co...
Harald Kosch
LICS
2007
IEEE
16 years 21 days ago
Symmetric Datalog and Constraint Satisfaction Problems in Logspace
We introduce symmetric Datalog, a syntactic restriction of linear Datalog and show that its expressive power is exactly that of restricted symmetric monotone Krom SNP. The deep re...
László Egri, Benoit Larose, Pascal T...
ICALT
2005
IEEE
16 years 1 days ago
Designing Web-Based Interactive Learning Environments for Problem-Based Learning
Problem-based learning is a pedagogical strategy that centers learning activities around the investigation and development of solutions to complex and ill-structured authentic pro...
Lin Qiu, Christopher Riesbeck
ALT
2011
Springer
14 years 6 months ago
On Noise-Tolerant Learning of Sparse Parities and Related Problems
We consider the problem of learning sparse parities in the presence of noise. For learning parities on r out of n variables, we give an algorithm that runs in time poly log 1 δ , ...
Elena Grigorescu, Lev Reyzin, Santosh Vempala
NIPS
1992
15 years 7 months ago
Some Solutions to the Missing Feature Problem in Vision
In visual processing the ability to deal with missing and noisy information is crucial. Occlusions and unreliable feature detectors often lead to situations where little or no dir...
Subutai Ahmad, Volker Tresp