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EDBT
2009
ACM
156views Database» more  EDBT 2009»
15 years 4 months ago
Secondary bitmap indexes with vertical and horizontal partitioning
Traditional bitmap indexes are utilized as a special type of primary or clustered indexes where the queries are answered by performing fast logical operations supported by hardwar...
Guadalupe Canahuate, Tan Apaydin, Ahmet Sacan, Hak...
NORDICHI
2004
ACM
15 years 5 months ago
Mobile probes
This paper describes a new digital user study tool called Mobile Probes. Mobile Probes arose from a need to develop contextual and dynamic self-documenting tools for studying peop...
Sami Hulkko, Tuuli Mattelmäki, Katja Virtanen...
ICAC
2005
IEEE
15 years 5 months ago
Model-Driven Placement of Compute Tasks and Data in a Networked Utility
An important problem in resource management for networked resource-sharing systems is the simultaneous allocation of multiple resources to an application. Selfoptimizing systems m...
Piyush Shivam, Adriana Iamnitchi, Aydan R. Yumeref...
INFOCOM
2006
IEEE
15 years 5 months ago
Sampling Techniques for Large, Dynamic Graphs
— Peer-to-peer systems are becoming increasingly popular, with millions of simultaneous users and a wide range of applications. Understanding existing systems and devising new pe...
Daniel Stutzbach, Reza Rejaie, Nick G. Duffield, S...
GECCO
2009
Springer
121views Optimization» more  GECCO 2009»
15 years 4 months ago
Using memetic algorithms to improve portfolio performance in static and dynamic trading scenarios
The Portfolio Optimization problem consists of the selection of a group of assets to a long-term fund in order to minimize the risk and maximize the return of the investment. This...
Claus de Castro Aranha, Hitoshi Iba