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ICDE
2005
IEEE
139views Database» more  ICDE 2005»
15 years 11 months ago
Compressing Bitmap Indices by Data Reorganization
Many scientific applications generate massive volumes of data through observations or computer simulations, bringing up the need for effective indexing methods for efficient stora...
Ali Pinar, Tao Tao, Hakan Ferhatosmanoglu
CIKM
2008
Springer
14 years 11 months ago
Modeling hidden topics on document manifold
Topic modeling has been a key problem for document analysis. One of the canonical approaches for topic modeling is Probabilistic Latent Semantic Indexing, which maximizes the join...
Deng Cai, Qiaozhu Mei, Jiawei Han, Chengxiang Zhai
AIED
2009
Springer
15 years 4 months ago
Intelligent Tutoring Systems with Multiple Representations and Self-Explanation Prompts Support Learning of Fractions
Although a solid understanding of fractions is foundational in mathematics, the concept of fractions remains a challenging one. Previous research suggests that multiple graphical r...
Martina A. Rau, Vincent Aleven, Nikol Rummel
CICLING
2004
Springer
15 years 3 months ago
Hierarchies Measuring Qualitative Variables
Qualitative variables take symbolic values, such as hot, shoe, Europe or France. Sometimes, the values may be arranged in layers or levels of detail. For instance, the variable pla...
Serguei Levachkine, Adolfo Guzmán-Arenas
BIOCOMP
2006
14 years 11 months ago
Basic Reproductive Rate of a Spatial Epidemic Seir Model using Computer Algebra Software
The use of computer algebra software has many applications in diverse fields like epidemiology. This work pretends to show how computer algebra software applications for symbolic ...
Sebastian Guzmán, Juan Fernando Ospina