A recently developed renormalization approach is used to study the electron-phonon coupling in many-electron systems. By starting from an Hamiltonian which includes a small gauge symmetry breaking field, we directly derive a BCS-like equation for the energy gap from the renormalization approach....

This article addresses a key problem of the German system of co-determination that primarily relates to the changed economic framework conditions of work. It presents a find as a variant of democratic participation that could function as a hinge between direct participation and representative...

Das Spannungsverhaeltnis von Patientenwohl und wirtschaftlichen Zielstellungen im Gesundheitswesen ist schon laenger Gegenstand von Debatten, die verschiedene Ebenen und (ExpertInnen-)Kreise durchziehen: Sei es als PatientIn, interessierte BuergerIn und BeitragszahlerIn, Sachverstaendiger oder...