Results 1 to 10 of about 32,051 (265)

Pipelining in multi-query optimization [PDF]

open access: greenJournal of Computer and System Sciences, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
DALVI, NILESH N   +3 more
openaire   +5 more sources

Query optimization at the crossroads [PDF]

open access: bronzeProceedings of the 1997 ACM SIGMOD international conference on Management of data - SIGMOD '97, 1997
Surajit Chaudhuri
openaire   +4 more sources

Optimal Divide and Query [PDF]

open access: yes, 2011
This work has been partially supported by the Spanish Ministerio de Ciencia e Innovación under grant TIN2008-06622-C03-02 and by the Generalitat Valenciana under grant PROMETEO/2011/052.
Insa Cabrera, David   +1 more
openaire   +2 more sources

Query Optimization in an OODBMS [PDF]

open access: yes, 1993
It is clearly crucial for the success of object—oriented databases to find efficient implementations that improve on the performance of relational systems, rather than being powerful in terms of modeling and features, but just too slow to be used. This paper describes the mapping of COCOON to DASDBS, a nested relational database kernel system, as an ...
Rich, Christian, Scholl, Marc H.
openaire   +3 more sources

Semantic Optimization of Conjunctive Queries [PDF]

open access: yesJournal of the ACM, 2020
This work deals with the problem of semantic optimization of the central class of conjunctive queries (CQs). Since CQ evaluation is NP-complete, a long line of research has focussed on identifying fragments of CQs that can be efficiently evaluated.
Barcelo P.   +3 more
openaire   +4 more sources

Neo [PDF]

open access: yesProceedings of the VLDB Endowment, 2019
Query optimization is one of the most challenging problems in database systems. Despite the progress made over the past decades, query optimizers remain extremely complex components that require a great deal of hand-tuning for specific workloads and datasets. Motivated by this shortcoming and inspired by recent advances in applying machine
Marcus, Ryan   +7 more
openaire   +5 more sources

XPath whole query optimization [PDF]

open access: yesProceedings of the VLDB Endowment, 2010
Previous work reports about SXSI, a fast XPath engine which executes tree automata over compressed XML indexes. Here, reasons are investigated why SXSI is so fast. It is shown that tree automata can be used as a general framework for fine grained XML query optimization.
Kim Nguyen, Sebastian Maneth
openaire   +3 more sources

A stepwise emergence of evolution in the RNA world

open access: yesFEBS Letters, EarlyView.
How did biological evolution emerge from chemical reactions? This perspective proposes a gradual scenario of self‐organization among RNA molecules, where catalytic feedback on random mixtures plays the central role. Short oligomers cross‐ligate, and self‐assembly enables heritable variations. An event of template‐externalization marks the transition to
Philippe Nghe
wiley   +1 more source

Evolutionary interplay between viruses and R‐loops

open access: yesFEBS Letters, EarlyView.
Viruses interact with specialized nucleic acid structures called R‐loops to influence host transcription, epigenetic states, latency, and immune evasion. This Perspective examines the roles of R‐loops in viral replication, integration, and silencing, and how viruses co‐opt or avoid these structures.
Zsolt Karányi   +4 more
wiley   +1 more source

Disruption of SETD3‐mediated histidine‐73 methylation by the BWCFF‐associated β‐actin G74S mutation

open access: yesFEBS Letters, EarlyView.
The β‐actin G74S mutation causes altered interaction of actin with SETD3, reducing histidine‐73 methylation efficiency and forming two distinct actin variants. The variable ratio of these variants across cell types and developmental stages contributes to tissue‐specific phenotypical changes. This imbalance may impair actin dynamics and mechanosensitive
Anja Marquardt   +8 more
wiley   +1 more source

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