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I discuss the nature of ‘hotspots’ and ‘jet knots’ in the kpc-scale structures of powerful radio galaxies and their relationship to jet-environment interactions. I describe evidence for interaction between the jets of FRI sources and their local environments, and discuss its relationship to particle acceleration, but the main focus of the paper is the hotspots of FRIIs and on new observational ...

We discuss a gauged U(1)R supergravity on five-dimensional orbifold (S/Z2) in which a Z2-even U(1) gauge field takes part in the U(1)R gauging, and show the structure of Fayet-Iliopoulos (FI) terms allowed in such model. Some physical consequences of the FI terms are examined.

In this paper we describe our configurable hotspot framework for ubiquitous interaction. A camera points to a physical space, the user defines interaction areas, and designs gestures by combining hotspots (rectangles) that detect simple 2D motions (left_right, top_bottom, etc.).