Jens Timmermann and Thomas Zwick

IPclip—An Innovative Mechanism to Reestablish Trust-by-Wire in Packet-switched IP Networks

Peter Danielis, Stephan Kubisch, Harald Widiger, Jens Schulz, Dirk Timmermann University of Rostock Institute of Applied Microelectronics and Computer Engineering 18051 Rostock, Germany Tel./Fax: +49 381 498-7272 / -1187251 Email: {peter.danielis;dirk.timmermann}@uni-rostock.de Web: http://www.imd.uni-rostock.de/networking Thomas Bahls, Daniel Duchow Nokia Siemens Networks GmbH & Co. KG Broadba...

Trust-by-Wire for Packet-switched IP Networks: Tools and FPGA-Prototype for the IPclip System

The packet processing system IPclip (IP Calling Line Identification Presentation) is presented. It is implemented on an FPGA board and configurable at runtime via a graphical configuration tool. The functionality is demonstrated in a localization scenario using an analysis tool and Google Earth.

Why do firms train apprentices? The net cost puzzle reconsidered

This paper investigates the short-term costs and benefits of apprenticeship training in Germany. It calls into question the popular stylised fact that apprenticeship training always leads to net costs during the apprenticeship period. We analyse the impact of the proportion of different occupational groups of apprentices on firm performance. We use representative matched employer–employee panel...

Age and Productivity – Sector Differences?

7 C - pseudo - Kac systems and duality for coactions of concrete

We study coactions of concrete Hopf C -bimodules in the framework of (weak) C pseudo-Kac systems, define reduced crossed products and dual coactions, and prove an analogue of Baaj-Skandalis duality.