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SIGMOD
1996
ACM
109views Database» more  SIGMOD 1996»
15 years 8 months ago
Improved Histograms for Selectivity Estimation of Range Predicates
Many commercial database systems maintain histograms to summarize the contents of relations and permit efficient estimation of query result sizes and access plan costs. Although s...
Viswanath Poosala, Yannis E. Ioannidis, Peter J. H...
ICRA
1994
IEEE
100views Robotics» more  ICRA 1994»
15 years 8 months ago
SM2 for New Space Station Structure: Autonomous Locomotion and Teleoperation Control
The Self-Mobile Space Manipulator (SM2) has evolved to adapt to the new pre-integrated I-beam structure of the Space Station Freedom (SSF). In this paper, we first briefly overvie...
Michael C. Nechyba, Yangsheng Xu
BTW
1993
Springer
193views Database» more  BTW 1993»
15 years 8 months ago
Query Optimization in an OODBMS
It is clearly crucial for the success of object-oriented databases to find effiĆ cient implementations that improve on the performance of relational sysĆ tems, rather than being...
Christian Rich, Marc H. Scholl
AIED
2007
Springer
15 years 8 months ago
'Tis Better to Construct than to Receive? The Effects of Diagram Tools on Causal Reasoning
Previous research on the use of diagrams for argumentation instruction has highlighted, but not conclusively demonstrated, their potential benefits. We examine the relative benefit...
Matthew W. Easterday, Vincent Aleven, Richard Sche...
AIED
2007
Springer
15 years 8 months ago
Towards promoting meta-cognition using emotive interface personas within Open-Learner Modelling Environments
: The use of Open-Learner Modelling (OLM) within Intelligent Learning Environments is becoming more common. By allowing learners a greater control over their learning experience, O...
Sylvie Girard