The BaBar Collaboration has operated a system covering over 2000 m with resistive plate chambers for nearly three years. The chambers are constructed of bakelite sheets separated by 2 mm. The inner surfaces are coated with linseed oil. This system provides muon and neutral hadron detection for BaBar. Installation and commissioning were completed in 1998, and operation began mid-1999. While init...

We report the studies of emission from a novel random amplifying medium that we term a “Lévy Laser” due to the non-Gaussian statistical nature of its emission over the ensemble of random realizations. It is observed that the amplification is dominated by certain improbable events that are “larger than rare”, which give the intensity statistics a Lévy like “fat tail”. This, to the best of our kn...

In Böcker and Klüppelberg (2005) we presented a simple approximation of OpVaR of a single operational risk cell. The present paper derives approximations of similar quality and simplicity for the multivariate problem. Our approach is based on modelling of the dependence structure of different cells via the new concept of a Lévy copula. JEL Classifications: G18,G39.

We show that L0(φ, H) is extremely amenable for any diffused submeasure φ and any solvable compact group H. This extends results of Herer–Christensen and of Glasner and Furstenberg–Weiss. Proofs of these earlier results used spectral theory or concentration of measure. Our argument is based on a new Ramsey theorem proved using ideas coming from combinatorial applications of algebraic topologica...

This document bases on an innovation project by INECO aimed at developing and integrating a flight simulator in ATM (Air Traffic Management) simulation platforms. The paper documents a method for generation of aircraft flyable trajectories based on a simulation engine instead of calculated trajectories [1].

Location sharing services (LSS) like Foursquare, Gowalla, and Facebook Places support hundreds of millions of userdriven footprints (i.e., “checkins”). Those global-scale footprints provide a unique opportunity to study the social and temporal characteristics of how people use these services and to model patterns of human mobility, which are significant factors for the design of future mobile+l...