We introduce undercomplete independent component analysis (uICA), a method for extracting K signals from M K mixtures of N M source signals. The mixtures x = (x 1 ; : : :; x M) T are formed from a linear combination of the independent source signals s = (s 1 ; : : :; s N) T using an M N mixing matrix A, so that x = As. For the case N = K = M, Bell and Sejnowski Bell and Sejnowski, 1995] showed ...

Suppose we wish to decide which of two treatments is better, where the outcomes are Bernoulli random variables , the success probabilities of which, themselves, are modeled as independent beta random variables. Assume that the maximal population size for the experiment is xed, but that the length of the study and the number and order of patients assigned to each treatment may be random. Our goa...

I never intended to take a special role on the team or to become the story, but that’s what happened. By the end of the day, I had found the suspect in the Global Tag Challenge (I. Rahwan, et al., “Global Manhunt Pushes the Limits of Social Mobilization,” pp. 68-75) and was subsequently accused of demonstrating why crowdsourcing doesn’t work. I had become interested in crowdsourcing when people...

BRONCHOCONSTRICTION IS A CARDINAL feature of asthma. It involves airway narrowing, increase in airway resistance, impairment of breathing, and can in very severe cases even lead to death. The severe narrowing of the airway lumen during bronchoconstriction is caused by a shortening of the airway smooth muscle in response to agonists or vagal stimulation. However, does a simple stimulus-response ...

We consider binary fingerprinting codes that trace at least one of t pirates using the marking assumption. Ensembles of binary equal-weight codes are considered along with a new efficient decoding algorithm. The design substantially increases the code rates of the former fingerprinting constructions. In particular, for large t, the new tfingerprinting codes have code rate of t−2 ln 2 and identi...