We consider a series of duality transformations that leads to a constant shift in the harmonic functions appearing in the description of a configuration of branes. This way, for several intersectionsâ€¦ (More)

We construct a class of intersecting brane solutions with horizon geometries of the form adSk Ã— S Ã— S Ã— E. We describe how all these solutions are connected through the addition of a wave and/orâ€¦ (More)

We construct the path integral for one-dimensional non-linear sigma models, starting from a given Hamiltonian operator and states in a Hilbert space. By explicit evaluation of the discretizedâ€¦ (More)

We consider a series of duality transformations that leads to a constant shift in the harmonic functions appearing in the description of a configuration of branes. This way, for several intersectionsâ€¦ (More)

By carefully analyzing the relations between operator methods and the discretized and continuum path integral formulations of quantum-mechanical systems, we have found the correct Feynman rules forâ€¦ (More)

We demonstrate that type II string theory compactified on a singular Calabi-Yau manifold is related to c = 1 string theory compactified at the self-dual radius. We establish this result in two ways.â€¦ (More)

Abstract: Although they are generally modelled as linear systems, aircraft structures are known to be prone to nonlinear phenomena. A specific challenge encountered with fighter aircraft, besidesâ€¦ (More)

In his seminal 1971 essay Freedom of the Will and the Concept of a Person, Harry Frankfurt provides an insightful account of free will and the problem of determinism, that is not metaphysical, butâ€¦ (More)

In the last decades we have seen an increased interest in the acoustics of ancient Greek and Roman theatres and much research has been performed on many of them. Research has mainly focused onâ€¦ (More)