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Investigating cell-material interactions by monitoring and analysing cell migration

Kaiser, J.-P ; Bruinink, A.

In: Journal of Materials Science: Materials in Medicine, 2004, vol. 15, no. 4, p. 429-435

Université de Fribourg

Charge migration and charge transfer in molecular systems

Wörner, Hans Jakob ; Arrell, a), Christopher A. ; Banerji, Natalie ; Cannizzo, Andrea ; Chergui, Majed ; Das, Akshaya K. ; Hamm, Peter ; Keller, Ursula ; Kraus, Peter M. ; Liberatore, Elisa ; Lopez-Tarifa, Pablo ; Lucchini, Matteo ; Meuwly, Markus ; Milne, Chris ; Moser, Jacques-E. ; Rothlisberger, Ursula ; Smolentsev, Grigory ; Teuscher, Joël ; Bokhoven, Jeroen A. van ; Wenger, Oliver

In: Structural Dynamics, 2017, vol. 4, no. 6, p. 061508

The transfer of charge at the molecular level plays a fundamental role in many areas of chemistry, physics, biology and materials science. Today, more than 60 years after the seminal work of R. A. Marcus, charge transfer is still a very active field of research. An important recent impetus comes from the ability to resolve ever faster temporal events, down to the attosecond time scale. Such...

Université de Fribourg

Three decades of volume change of a small greenlandic glacier using ground penetrating radar, structure from motion, and aerial photogrammetry

Marcer, M. ; Stentoft, P. A. ; Bjerre, E. ; Cimoli, E. ; Bjørk, A. ; Stenseng, L. ; Machguth, Horst

In: Arctic, Antarctic, and Alpine Research, 2017, vol. 49, no. 3, p. 411–425

Glaciers in the Arctic are losing mass at an increasing rate. Here we use surface topography derived from Structure from Motion (SfM) and ice volume from ground penetrating radar (GPR) to describe the 2014 state of Aqqutikitsoq glacier (2.85 km2) on Greenland's west coast. A photogrammetrically derived 1985 digital elevation model (DEM) was subtracted from a 2014 DEM obtained using land-based...

Université de Fribourg

Shear-induced migration in colloidal suspensions

Marmet, Philip ; Scacchi, Alberto ; Brader, Joseph M.

In: Molecular Physics, 2017, vol. 115, no. 14, p. 1691–1699

Using Brownian dynamics simulations, we perform a systematic investigation of the shear-induced migration of colloidal particles subject to Poiseuille flow in both cylindrical and planar geometry. We find that adding an attractive component to the interparticle interaction enhances the migration effect, consistent with recent simulation studies of platelet suspensions. Monodisperse,...

Université de Fribourg

Reconstructing the annual mass balance of the Echaurren Norte glacier (Central Andes, 33.5° S) using local and regional hydroclimatic data

Masiokas, Mariano H. ; Christie, Duncan A. ; Quesne, Carlos Le ; Pitte, Pierre ; Ruiz, Lucas ; Villalba, Ricardo ; Luckman, Brian H. ; Berthier, Etienne ; Nussbaumer, Samuel U. ; González-Reyes, Álvaro ; McPhee, James ; Barcaza, Gonzalo

In: The Cryosphere, 2016, vol. 10, no. 2, p. 927–940

Despite the great number and variety of glaciers in southern South America, in situ glacier mass-balance records are extremely scarce and glacier–climate relationships are still poorly understood in this region. Here we use the longest (> 35 years) and most complete in situ mass-balance record, available for the Echaurren Norte glacier (ECH) in the Andes at ∼ 33.5° S, to...

Université de Fribourg

Reversal of migration flows : a fresh look at the German reunification

Schäfer, Andreas ; Steger, Thomas M. ; Fuchs, Benjamin ; Grossmann, Volker

(Working Papers SES ; 474)

We investigate the dynamic effects of interregional labor market integration on migration flows, capital formation, and the price for housing services. The co-evolution of these variables depends on initial conditions at the time of labor market integration. In an initially capital-poor economy, there may be a reversal of migration flows during the transition to the steady state, while housing...