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ISBI
2008
IEEE
13 years 11 months ago
Comparative assessment of different energy mapping methods for generation of 511-keV attenuation map from CT images in PET/CT sy
The use of X-ray CT images for CT-based attenuation correction (CTAC) of PET data results in the decrease of overall scanning time and creates a noise-free attenuation map (μmap)...
Maryam Shirmohammad, Mohammad Reza Ay, Saeed Sarka...
CHI
2006
ACM
14 years 5 months ago
A comparative study of map use
We present a study comparing the handling of three kinds of maps, each on a physical device: a paper map, a tablet-PC based map, and a cellular phone based one. Six groups of user...
Allan Hansen, Christina Brodersen, Clemens Nylands...
APCHI
2004
IEEE
13 years 8 months ago
Extending Tree-Maps to Three Dimensions: A Comparative Study
This paper presents StepTree, an information visualization tool designed for depicting hierarchies, such as directory structures. StepTree is similar to the hierarchy-visualization...
Thomas Bladh, David A. Carr, Jeremiah Scholl
ADBIS
2007
Springer
145views Database» more  ADBIS 2007»
13 years 11 months ago
A Method for Comparing Self-organizing Maps: Case Studies of Banking and Linguistic Data
The method of self-organizing maps (SOM) is a method of exploratory data analysis used for clustering and projecting multi-dimensional data into a lower-dimensional space to reveal...
Toomas Kirt, Ene Vainik, Leo Vohandu
WSOM
2009
Springer
13 years 11 months ago
Analyzing Domestic Violence with Topographic Maps: A Comparative Study
Topographic maps are an appealing exploratory instrument for discovering new knowledge from databases. During the recent years, several variations on the Self Organizing Maps (SOM)...
Jonas Poelmans, Paul Elzinga, Stijn Viaene, Guido ...