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VLDB
1994
ACM
129views Database» more  VLDB 1994»
15 years 10 months ago
Hilbert R-tree: An Improved R-tree using Fractals
We propose a new R-tree structure that outperforms all the older ones. The heart of the idea is to facilitate the deferred splitting approach in R-trees. This is done by proposing...
Ibrahim Kamel, Christos Faloutsos
ACSC
2007
IEEE
15 years 10 months ago
Segmentation and Border Identification of Cells in Images of Peripheral Blood Smear Slides
We present an unsupervised blood cell segmentation algorithm for images taken from peripheral blood smear slides. Unlike prior algorithms the method is fast; fully automated; find...
Nicola Ritter, James R. Cooper
AIED
2007
Springer
15 years 10 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...
ICCHP
2010
Springer
15 years 10 months ago
Mental Models of Menu Structures in Diabetes Assistants
Abstract. Demographic change in regard to an aging population with an increasing amount of diabetes patients will put a strain on health care rentability in all modern societies. E...
André Calero Valdez, Martina Ziefle, Firat ...
COLCOM
2007
IEEE
15 years 10 months ago
Transparent security for collaborative environments
Current collaborative tools are often not able to profit from existing systems for user management. It is therefore necessary for collaborative systems to administrate their users ...
Eva Hladká, Daniel Kouril, Michal Proch&aac...