Definition of the problem: Even after the new German legislation about organ donors and transplantation (“information solution”), the question of criteria for distributing the organs is still not solved. The various alternatives to solve this problem face different social acceptance and economic efficiency.Arguments: Medical criteria (e.g. HLA compatibility) and non-medical criteria (e.g. willingness to pay of the patients) are valued on the basis of generally accepted objectives (e.g. equal access to health services or low costs). As an innovative form of (...) organ distribution systems the club solution is introduced. It allows the donor to realise preferences regarding use of the organs.Conclusion: Scoring systems may help to increase the transparency of organ allocation. From an economic point of view medical criteria have to be weighted more than non-medical criteria. (shrink)

We generalize the nonlinear one-dimensional equation of a fluid layer for any depth and length as an infinite-order differential equation for the steady waves. This equation can be written as a q-differential one, with its general solution written as a power series expansion with coefficients satisfying a nonlinear recurrence relation. In the limit of long and shallow water (shallow channels) we reobtain the well-known KdV equation together with its single-soliton solution.

We introduce a smooth mapping of some discrete space-time symmetries into quasi-continuous ones. Such transformations are related with q-deformations of the dilations of the Euclidean space and with the noncommutative space. We work out two examples of Hamiltonian invariance under such symmetries. The Schrödinger equation for a free particle is investigated in such a noncommutative plane and a connection with anyonic statistics is found.