We construct new geon-type black holes in D ≥ 4 dimensions for Einstein’s theory coupled to gauge fields. A static nondegenerate vacuum black hole has a geon quotient provided the spatial section admits a suitable discrete isometry, and an antisymmetric tensor field of rank 2 or D − 2 with a pure F 2 action can be included by an appropriate (and in most cases nontrivial) choice of the field str...

The Biomedical Informatics Research Network (BIRN) is creating, extending, and deploying a production grid to enable groups of biomedical researchers to share complex and large-scale data. In this talk we describe the BIRN, its structure and overall Information Technology Structure. In addition we will describe the details of how the complete software stack is integrated, managed and deployed. ...

After more than a century since its birth, Quantum Theory still eludes our under1 standing. If asked to describe it, we have to resort to abstract and ad hoc principles about 2 complex Hilbert spaces. How is it possible that a fundamental physical theory cannot be de3 scribed using the ordinary language of Physics? Here we offer a contribution to the problem, 4 providing a short non-technical p...

It is well known that the inequivalent unitary irreducible representations (UIR’s) of the mapping class group G of a 3-manifold give rise to “theta sectors” in theories of quantum gravity with fixed spatial topology. In this paper, we study several families of UIR’s of G and attempt to understand the physical implications of the resulting quantum sectors. The mapping class group of a three-mani...