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UAI
2008
15 years 8 months ago
Continuous Time Dynamic Topic Models
In this paper, we develop the continuous time dynamic topic model (cDTM). The cDTM is a dynamic topic model that uses Brownian motion to model the latent topics through a sequenti...
Chong Wang, David M. Blei, David Heckerman
SDM
2007
SIAM
171views Data Mining» more  SDM 2007»
15 years 8 months ago
A Better Alternative to Piecewise Linear Time Series Segmentation
Time series are difficult to monitor, summarize and predict. Segmentation organizes time series into few intervals having uniform characteristics (flatness, linearity, modality,...
Daniel Lemire
SDM
2007
SIAM
86views Data Mining» more  SDM 2007»
15 years 8 months ago
Identifying Bundles of Product Options using Mutual Information Clustering
Mass-produced goods tend to be highly standardized in order to maximize manufacturing efficiencies. Some high-value goods with limited production quantities remain much less stand...
Claudia Perlich, Saharon Rosset
SECRYPT
2007
121views Business» more  SECRYPT 2007»
15 years 8 months ago
Using Steganography to Improve Hash Functions' Collision Resistance
Lately, hash function security has received increased attention. Especially after the recent attacks that were presented for SHA-1 and MD5, the need for a new and more robust hash...
Emmanouel Kellinis, Konstantinos Papapanagiotou
AAAI
2006
15 years 8 months ago
The Keystone Scavenger Team
Stereo vision for small mobile robots is a challenging problem, particularly when employing embedded systems with limited processing power. However, it holds the promise of greatl...
Jacky Baltes, John Anderson