We investigate mechanical mode coupling between the four fundamental flexural modes of two doublyclamped, high-Q silicon-nitride nanomechanical string resonators. Strong mechanical coupling between the strings is induced by the strain mediated via a shared clamping point, engineered to increase the exchange of oscillatory energy. One of the resonators is controlled dielectrically, which results in strong coupling between its out-of-plane and in-plane flexural modes. We show both, inter-string out-of-plane-in-plane and 3-mode resonance of the four coupled fundamental vibrational modes of a resonator pair, giving rise to a simple and a multimode avoided crossing, respectively.
Zusammenfassung: Ansgar Beckermanns kürzlich erschienenes Studienbuch »Glaube« wird rezensiert. Beckermann versucht zu zeigen, dass religiöser Glaube epistemisch gesehen irrational ist, indem er erstens die Argumente für die Wahrheit des Glaubens für zu schwach befindet und zweitens das TheodizeeProblem als starkes Argument gegen die Existenz eines allmächtigen, gütigen Gottes wertet. Ein besonderer Augenmerk der Rezension liegt auf der strategischen Anlage und den theologischen Voraussetzungen von Beckermanns Argumentation, etwa ihre Annahmen, dass religiöser Glaube zur Gattung der alltäg-lichen Überzeugungen gehört, und dass die Theodizee ein logisches Problem darstellt. Die Schwachpunkte von Beckermanns Argumentation werden aufgezeigt und alternative Ansätze skizziert. Die Rezension schließt mit einer Bestandsaufnahme der Optionen für eine theologische Replik.Summary: Ansgar Beckermann's recent publication "Glaube" is reviewed in a survey of its key presuppositions and main arguments. In short, Beckermann deems religious faith to be epistemically irrational on the grounds that arguments in its favor are inconclusive and that the problem of evil strongly counts against the likelihood of an omnipotent, benevolent god. Special attention is paid to the setup of Beckermann's argument, for example its assumption that faith can be epistemically evaluated like everyday beliefs or the view that the problem of evil poses a logical problem. Weaknesses in Beckermann's arguments are identified and alternatives indicated. The review concludes by taking stock of the options for a theological rebuttal.
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