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CSCW
2012
ACM
14 years 1 months ago
Socializing volunteers in an online community: a field experiment
Although many off-line organizations give their employees training, mentorship, a cohort and other socialization experiences that improve their retention and productivity, online ...
Rosta Farzan, Robert Kraut, Aditya Pal, Joseph A. ...
ICDE
1999
IEEE
151views Database» more  ICDE 1999»
16 years 7 months ago
Data Integration by Describing Sources with Constraint Databases
We develop a data integration approach for the efficient evaluation of queries over autonomous source databases. The approach is based on some novel applications and extensions of...
Xun Cheng, Guozhu Dong, Tzekwan Lau, Jianwen Su
ATAL
2007
Springer
16 years 10 days ago
Scaling-up shopbots: a dynamic allocation-based approach
In this paper we consider the problem of eCommerce comparison shopping agents (shopbots) that are limited by capacity constraints. In light of the phenomenal increase both in dema...
David Sarne, Sarit Kraus, Takayuki Ito
143
Voted
OR
2005
Springer
15 years 11 months ago
Optimal Fares for Public Transport
The fare planning problem for public transport is to design a system of fares that maximize the revenue. We introduce a nonlinear optimization model to approach this problem. It i...
Ralf Borndörfer, Marika Neumann, Marc E. Pfet...
VLDB
2001
ACM
190views Database» more  VLDB 2001»
15 years 10 months ago
LEO - DB2's LEarning Optimizer
Most modern DBMS optimizers rely upon a cost model to choose the best query execution plan (QEP) for any given query. Cost estimates are heavily dependent upon the optimizer’s e...
Michael Stillger, Guy M. Lohman, Volker Markl, Mok...