Beobachtung der Mondfinsterniss 1898 Dec. 27

UAV-basierte Fernerkundungsmethoden der Aerogeophysik fuer die hochaufloesende Beobachtung von alpinen Rutschhaengen

Internetzensur: Methoden und deren Beobachtung

ZUSAMMENFASSUNG In der vorliegenden Arbeit geht es um Internetzensur im Sinne von Internetausfällen, wie sie auf Anordnung von den Regierungen in Ägypten und Libyen zu Beginn des Jahres 2011 im Zusammenhang mit den dort auftretenden Revolutionen passierten. Im Referenzpaper [1] wurden diese durch BGP-Routenaktualisierungen und unangeforderten Datenverkehr (Internet Background Radiation) in Dark...

A DER Based Single - Phase Asymmetrical 27 Level Inverter Topology

This paper deals single phase 27-level multilevel inverter topology for DER’s-based DC/AC conversion system. This work mainly focuses on cascaded MLI using three unequal dc sources in order to produce twenty seven-level output. In this study, a high step-up converter is introduced as a front-end stage to improve the conversion efficiency of conventional boost converters and to stabilize the out...

Verteilte Beobachtung von Ereignissen im Nexus-Lokationsdienst

The goal of the Nexus Event Service is to detect state change in services including the distributed Nexus Location Service. So far only state change on an isolated location service node can be detected. This work presents a model for distributed observation of events tailored to Nexus. With this model state change in a distributed set of location service nodes can be detected.

Structure in the radio counterpart to the 2004 Dec 27 giant flare from SGR 1806 - 20

On Dec 27, 2004, the magnetar SGR 1806-20 underwent an enormous outburst resulting in the formation of an expanding, moving, and fading radio source. We report observations of this radio source with the Multi-Element Radio-Linked Interferometer Network (MERLIN) and the Very Long Baseline Array (VLBA). The observations confirm the elongation and expansion already reported based on observations a...