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Although the blister model for the Orion Nebula is widely accepted, an alternative model, where the optical appearance of the nebula is primarily determined by self-extinction, continues to be considered by some and has never specifically been disproven. I summarize the characteristics of the two models and show that the evidence falls overwhelmingly against the self-extinction model and in fav...

We present further results on the educational effectiveness of an intelligent computer tutor that helps students learn effectively from examples by coaching self-explanation – the process of explaining to oneself an example worked-out solution. An earlier analysis of the results from a formative evaluation of the system provided suggestive evidence that it could improve students’ learning. In t...

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We study large deviations for the renormalized self-intersection local time of d-dimensional stable processes of index β ∈ (2d/3, d]. We find a difference between the upper and lower tail. In addition, we find that the behavior of the lower tail depends critically on whether β < d or β = d.

We formulate and study a new coarse (co-)assembly map. It involves a modification of the Higson corona construction and produces a map dual in an appropriate sense to the standard coarse assembly map. The new assembly map is shown to be an isomorphism in many cases. For the underlying metric space of a group, the coarse co-assembly map is closely related to the existence of a dual Dirac morphis...

Equilibrium Phase Behavior and Self-assemble Dynamics of a Continuous-Space Microphase Former