Abstract We consider a degenerate scalar parabolic equation, in one spatial dimension, of flux-saturated type. The equation also contains convective term. study the existence and regularity traveling-wave solutions; particular we show that they can be discontinuous. Uniqueness is recovered by requiring an entropy condition, entropic solutions turn out to vanishing-diffusion limits with addition...

Fact collections are mostly built using semi-supervised relation extraction techniques and wisdom of the crowds methods, rendering them inherently noisy. In this paper, we propose to validate the resulting facts by leveraging global constraints inherent in large fact collections, observing that correct facts will tend to match their arguments with other facts more often than with incorrect ones...

The Wisdom of Crowds describes the fact that aggregating a group’s estimate regarding unknown values is often a better strategy than selecting even an expert’s opinion. The efficacy of this strategy, however, depends on biases being nonsystematic and everyone being able to make a meaningful assessment. In situations where these conditions do not hold, expertise seems more likely to produce the ...

The average estimates of a group of individuals are generally better than the estimates of the individuals alone, a phenomenon commonly referred to as the wisdom of crowds. This has been shown to work for many types of simple tasks, but has generally been performed on subjects that do not communicate with one another. We report group aggregation performance for more complex tasks, involving rec...