The problem of determining the electromagnetic and gravitational " self-force " on a particle in a curved spacetime is investigated using an axiomatic approach. In the electromagnetic case, our keyâ€¦ (More)

This section looks back to some ground-breaking contributions to public health, reproducing them in their original form and adding a commentary on their significance from a modern-day perspective. Toâ€¦ (More)

For smooth solutions to Maxwell's equations sourced by a smooth charge-current distribution j a in stationary, asymptotically flat spacetimes, one can prove an energy conservation theorem whichâ€¦ (More)

Several different methods have recently been proposed for calculating the motion of a point particle coupled to a linearized gravitational field on a curved background. These proposals are motivatedâ€¦ (More)

We investigate the injection spectrum of ultra-high-energy (> 10 15 eV) cosmic rays under the hypotheses that (1) these cosmic rays are protons and (2) the sources of these cosmic rays areâ€¦ (More)