Jan
06
Teaser:

Computational modeling of eukaryotic cells moving on substrates is an extraordinarily complex task: many physical processes, such as actin polymerization, action of motors, formation of adhesive contacts concomitant with both substrate deformation and recruitment of actin etc., as well as regulatory pathways are intertwined. Moreover, highly nontrivial cell responses emerge when the substrate becomes deformable and/or heterogeneous. Here we extended a computational model for motile cell fragments, based on an earlier developed phase field approach, to account for...

Dec
02
Teaser:

Cosmic rays are microscopic, charged particles that permanently bombard Earth from outer space. 100 years after their discovery their origin is still a mystery. It is also not clear how cosmic rays can obtain energies that are sometimes billion times larger than what can be produced in the most powerful particle accelerator on Earth, the LHC, where the Higgs particle was discovered last year. Possible particle accelerators that nature provides are very exotic sites in the universe like exploding stars, massive black holes, gamma-ray bursts, and pulsars. To find out more about these...

Nov
23
Teaser:

To accept Special Relativity we give up Absolute Time. What do we give up to accept Quantum Theory?  After all these years Heisenberg's 1925 discovery paper for Quantum Theory is still opaque, in contrast to  Einstein's for Special Relativity. In hindsight, to accept Quantum Theory we must give up the Classical Principle, which is hardly ever even stated, for the Quantum Principle.  Today this is naturally inferred from a well-known polarization study of Malus in 1805.  Problems  like "spooky...

Nov
18
Teaser:
One of the aims of the annual Astro-GR meetings is to develop and strengthen the links between the astrophysics and relativity communities by highlighting outstanding scientific issues which can only be resolved through collaboration of these groups. In that spirit this workshop will dwell on questions which are intimately related to the formation, growth, and interaction of black holes with their environments, from cosmological scales all the way to the event horizon. - See more at: http://members.aei.mpg.de/amaro-seoane/astro-gr-atlanta/#Rationale

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Nov
15
Teaser:

Sources of single photons (as opposed to sources which produce on average a single photon) are of great current interest for quantum information
processing. Perhaps surprisingly, it is not easy to produce a single photon efficiently and in a controlled way. Following earlier progress, recent experimental activity has resulted in the production of single photons by taking advantage of strong inter-particle interactions in cold atomic gases. I will show how the systematic use of the method of steepest descents can be used to understand the dynamics of the single photon source developed here...

Nov
13
Teaser:

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