Purdue University West Lafayette, USA
August 2000 - Mai 2001

Motion perception

Universidad Autonoma de Madrid, SPAIN
September 1999 - Februar 2000

Die intergenerationalen Solidarbeziehungen innerhalb der spanischen Familien

Katholieke Universiteit Nijmegen, THE NETHERLANDS
Oktober 1999 - Dezember 1999

The Distribution of Synapses and Receptors Over the Surface Ofidentified Vertrebrate Neurons

University of Massachusetts, USA
Januar 2002 - Juni 2002

Mikrobial Mats and Biofilms

University of Dhaka, BANGLADESH
November 1999 - Februar 2000

Parallel Detection of Orientation Gratings and Perceptual Learning

Institut d´Anthropologie et de Sociologie, SWITZERLAND
Oktober 2000 - Januar 2001

The Political Economy of Welfare State (Trans-)Formation: Comparing Southern and Eastern European Experiences

Marine Sciences Research Center, USA
Mai 2003

Collaborative Studies of Mechanisms Controlling Particle Fluxes in the Mediterranean Sea

University of Washington, Seattle, USA
Januar 1999 - Juli 1999

Marine Particle Dynamics

Queens University, Kingston, CANADA
Mai 2016 - Mai 2016

Vectors of Transborder Deviance: The Structure, Drivers and Dynamics of Globalization's Illicit Networks