This paper describes heavy-tailed extensions of a state-of-the-art versatile blind source separation method called fast multichannel nonnegative matrix factorization (FastMNMF) from unified point view. The common way deriving such an extension is to replace the multivariate complex Gaussian distribution in likelihood function with its generalization, e.g., Student's t and leptokurtic generalize...

Electromigration is an important failure phenomenon in ULSI. There are several underlying physical mechanisms in an electromigration process depending on the stress conditions. In this work, we use various statistical techniques to investigate the number of such mechanisms for a given set of electromigration data. The statistical distribution of each mechanism can be found and the failure units...

Group-based trajectory models areused to investigate population differences in the developmental courses of behaviors or outcomes. This note introduces a new Stata command, traj, for fitting to longitudinal data finite (discrete) mixture models designed to identify clusters of individuals following similar progressions of some behavior or outcome over age or time. Normal, Censored normal, Poiss...

We seem to be surrounded by bell curves—curves more formally known as normal distributions, or Gaussian distributions. All manner of things appear to be distributed normally: people’s heights, sizes of snowflakes, errors in measurements, lifetimes of lightbulbs, IQ scores, weights of loaves of bread, and so on. I argue that the standard explanation for why such quantities are normally distribut...