Beobachtung der Leoniden 1901

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...

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.

Johannes Holtfreter (1901-1992)

Johannes Holtfreter [6] made important discoveries about the properties of the organizer [7] discovered by Hans Spemann [8]. Although he spent much time away from the lab over many years, he was a productive researcher. His colleagues noted that the time he spent away helped revitalize his ideas. He is credited with the development of a balanced salt medium to allow embryos to develop; the disc...

Op-gbev130144 1886..1901

Transposable elements (TEs) are a dominant feature of most flowering plant genomes. Together with other accepted facilitators of evolution, accumulating data indicate that TEs can explain much about their rapid evolution and diversification. Genome size in angiosperms is highly correlated with TE content and the overwhelming bulk (>80%) of large genomes can be composed of TEs. Among retro-TEs, ...