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266
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PODS
2011
ACM
238views Database» more  PODS 2011»
14 years 8 months ago
Beyond simple aggregates: indexing for summary queries
Database queries can be broadly classified into two categories: reporting queries and aggregation queries. The former retrieves a collection of records from the database that mat...
Zhewei Wei, Ke Yi
STOC
2004
ACM
121views Algorithms» more  STOC 2004»
16 years 6 months ago
Lower bounds for dynamic connectivity
We prove an (lg n) cell-probe lower bound on maintaining connectivity in dynamic graphs, as well as a more general trade-off between updates and queries. Our bound holds even if t...
Mihai Patrascu, Erik D. Demaine
152
Voted
ICDT
2010
ACM
219views Database» more  ICDT 2010»
16 years 3 months ago
Aggregate Queries for Discrete and Continuous Probabilistic XML
Sources of data uncertainty and imprecision are numerous. A way to handle this uncertainty is to associate probabilistic annotations to data. Many such probabilistic database mode...
Serge Abiteboul, T.-H Hubert Chan, Evgeny Kharlamo...
ISPD
2010
ACM
195views Hardware» more  ISPD 2010»
16 years 19 days ago
Density gradient minimization with coupling-constrained dummy fill for CMP control
In the nanometer IC design, dummy fill is often performed to improve layout pattern uniformity and the post-CMP quality. However, filling dummies might greatly increase intercon...
Huang-Yu Chen, Szu-Jui Chou, Yao-Wen Chang
CIKM
2009
Springer
16 years 11 days ago
Post-rank reordering: resolving preference misalignments between search engines and end users
No search engine is perfect. A typical type of imperfection is the preference misalignment between search engines and end users, e.g., from time to time, web users skip higherrank...
Chao Liu, Mei Li, Yi-Min Wang