Imaging with Scattered Neutrons (2006)
Ballhausen, H., Abele, H., Gaehler, R., Trapp, M., Van Overberghe, A.
We describe a novel experimental technique for neutron imaging with scattered neutrons. These scattered neutrons are of interest for condensed matter physics, because they permit to reveal the local...
Neutron Radiography Analysis of a Transient Liquid Phase Joint (2006)
Ballhausen, H., Abele, H., Eccleston, R. S., Gaehler, R., Smith, A. J., Steuwer, A., ...
Neutron radiography in many cases is the only non-destructive technique available for the analysis of a wide range of samples from metallurgy, materials engineering and materials testing. In this...
Critical Exponents from Dimensional Variation (2003)
Recent work on exact renormalization group flow equations has pointed out the possibility to study critical phenomena in continuous dimension D of space. In an investigation of the O(N) model the...
Critical Phenomena in Continuous Dimension (2003)
Ballhausen, H., Berges, J., Wetterich, C.
We present a calculation of critical phenomena directly in continuous dimension d employing an exact renormalization group equation for the effective average action. For an Ising-type scalar field...
Direct Calculation of the Critical Effective Potential (2003)
The critical effective potential is the nonperturbative part of the effective action at a phase transition. It equals the scale invariant effective average potential and can be calculated from the...
Fair Solution to the Reader-Writer-Problem with Semaphores only (2003)
The reader-writer-problem is a standard problem in concurrent programming. A resource is shared by several processes which need either inclusive reading or exclusive writing access. The known...
The Effective Average Action Beyond First Order (2003)
A derivative expansion of the effective average action beyond first order yields renormalization group functional flow equations which are used for the computation of critical exponents of the Ising...