Saturday, September 11, 2010
Latex fonts for MS Office
look visually compatible with the fonts used for math in LaTex - you
might want to get the AMS set of LaTex fonts for MS-Office
Wednesday, April 21, 2010
Peer review ? Really ?
Found in a "peer-reviewed" journal Advances in Neural Computing – italics mine.
Functional magnetic resonance imaging (fMRI) is a new non-hurt measure technique for brain activity , which have been used at the study of brain cognition, locating nerve activity, medicine, psychology and other domains, and has become one of the most important way of the study of brain function
…
In general, the general linear model take Gamma function as hemodynamic response function to get design matrix. But, it is not reasonable in most actually case. The BOLD signal of the cerebral activation is a collective response of an activated region and it can be explained as a mutual interaction process between the neural response to a stimulus and the hemodynamic change due to the activation of a neural cluster.
It goes in this spirit … but need I bother ?
Monday, April 19, 2010
Self tuning spectral clustering
Abstract
Spectral clustering has been theoretically analyzed and empirically proven useful. There are still open issues:
(i) Selecting the appropriate scale of analysis,
(ii) Handling multi-scale data,
(iii) Clustering with irregular background clutter, and,
(iv) Finding automatically the number of groups.
We explore and address all the above issues. We first propose that a `local' scale should be used to compute the affinity between each pair of points. This local scaling leads to better clustering especially when the data includes multiple scales and when the clusters are placed within a cluttered background. We further suggest exploiting the structure of the eigenvectors to infer automatically the number of groups. This leads to a new algorithm in which the final randomly initialized k-means stage is eliminated.