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FQAS
2009
Springer
202views Database» more  FQAS 2009»
15 years 4 months ago
Controlled Aggregate Tree Shaped Questions over Ontologies
Abstract. Controlled languages (CLs) are ambiguity-free subsets of natural languages such as English offering a good trade-off between the formal rigor of ontology and query langua...
Camilo Thorne, Diego Calvanese
ESA
2007
Springer
121views Algorithms» more  ESA 2007»
15 years 4 months ago
Finding Frequent Elements in Non-bursty Streams
We present an algorithm for finding frequent elements in a stream where the arrivals are not bursty. Depending on the amount of burstiness in the stream our algorithm detects elem...
Rina Panigrahy, Dilys Thomas
WOLLIC
2010
Springer
15 years 3 months ago
Feasible Functions over Co-inductive Data
Proof theoretic characterizations of complexity classes are of considerable interest because they link levels of conceptual abstraction to computational complexity. We consider he...
Ramyaa Ramyaa, Daniel Leivant
VLDB
1997
ACM
140views Database» more  VLDB 1997»
15 years 2 months ago
Parallel Query Scheduling and Optimization with Time- and Space-Shared Resources
Scheduling query execution plans is a particularly complex problem in hierarchical parallel systems, where each site consists of a collection of local time-shared (e.g., CPU(s) or...
Minos N. Garofalakis, Yannis E. Ioannidis
CORR
2010
Springer
165views Education» more  CORR 2010»
14 years 10 months ago
Online Learning: Beyond Regret
We study online learnability of a wide class of problems, extending the results of [26] to general notions of performance measure well beyond external regret. Our framework simult...
Alexander Rakhlin, Karthik Sridharan, Ambuj Tewari