Mit Namen gezeichnete Artikel geben die persönliche Meinung des Verfassers wieder. Nachdruck aller Beiträge nur nach Rücksprache mit der Redaktion Der Gründungsausschuß für die Universität Oldenburg, das Konzil und der Senat der Universität Oldenburg haben einstimmig beschlossen, daß die Universität Oldenburg den Namen Carl-von-Ossietzky-Universität führt. Die Universität bedauert, daß ihr die ...

We present a hybrid algorithm to compute the convex hull of points in three or higher dimensional spaces. Our formulation uses a GPU-based interior point filter to cull away many of the points that do not lie on the boundary. The convex hull of remaining points is computed on a CPU. The GPU-based filter proceeds in an incremental manner and computes a pseudo-hull that is contained inside the co...

The Australian National University (ANU) has worked for many years on paraboloidal dish solar concentrators and demonstrated a 400m system in 1994. The commercialization of this technology has involved a re-design of the Big Dish concept for mass production. The new design is a 494 m2 concentrator with 13.4 m focal length and altitude-azimuth tracking. It uses 380 identical spherical 1.17m × 1....

A single transverse mode high-pulse-energy vertical-external-cavity surface-emitting laser (VECSEL) was developed. The GaSb-based VECSEL emits at a wavelength of 2.04 µm with peak power exceeding 500 W while maintaining good beam quality. cavity employs Pockels cell combined low-loss thin film polarizer to selectively dump the intracavity energy into 10 ns pulse. has promise for incoherent LIDA...

No problem is ever permanently closed. The editor is always pleased to consider for publication new solutions or new insights o n p a s t p r oblems. (1) Determine the set of all c > 0 such that whenever (1) holds, then we have x + y + z xy + yz+ zx. The positive r eals c asked for are those satisfying c 4. From (1), we have xy < c and z = c ; xy x + y + xy. Substituting this value of z into th...