Discovery of Paradoxical Geometries published in Nature
An international group of researchers from the Jagiellonian University (Krakow, Poland), led by Prof J. Heddle, have produced a super-stable artificial protein ball that apparently defies the rules of geometry.
State-of-the-art facilities for Mathematical Sciences and Computer Science now under construction
Work has begun on the construction of a new building which will house the expanding departments of Mathematical Sciences and Computer Science. The development is taking place on the Upper Mountjoy site of the University campus.
Presented by Simon Candelaresi, AlbaNova Univ. Center Nordita
24 February 2012 14:45 in CG 83
The dynamics of magnetic fields is strongly affected by its topological structure, rather then its geometry alone. For linked or knotted fields the behaviour is restricted by the topological invariants, in particular the magnetic helicity, which is a measure of interlinkage. Magnetic helicity arises naturually during the dynamo process, where through turbulent motions strong large-scale magnetic fields are created. This is manifested in the coronal loops of our Sun, which show a helical structure.
The dynamical evolution and turbulent decay of magnetic fields is shown for various knotted and linked magnetic structures. We show that the main restriction poses the magnetic helicity. Higher order topological invariants do not seem to have any relevance in the dynamics.