TY - GEN AU - Dechert, Christopher AU - Kenig, Eugeny ID - 52573 TI - Der Einfluss von Mikrostrukturen auf die Flüssigkeitsausbreitung in strukturierten Packungen ER - TY - CHAP AU - Dahmen, Stephan ED - Schär, Clarissa ED - Heite, Catrin ED - Magyar-Haas, Veronika ID - 50142 T2 - Responsibilisierung TI - Der Imperativ der Biographisierung und die Ambivalenzen individueller Verantwortungszuschreibung ER - TY - JOUR AB - Miller's rule is an empirical relation between the nonlinear and linear optical coefficients that applies to a large class of materials but has only been rigorously derived for the classical Lorentz model with a weak anharmonic perturbation. In this work, we extend the proof and present a detailed derivation of Miller's rule for an equivalent quantum-mechanical anharmonic oscillator. For this purpose, the classical concept of velocity-dependent damping inherent to the Lorentz model is replaced by an adiabatic switch-on of the external electric field, which allows a unified treatment of the classical and quantum-mechanical systems using identical potentials and fields. Although the dynamics of the resulting charge oscillations, and hence the induced polarizations, deviate due to the finite zero-point motion in the quantum-mechanical framework, we find that Miller's rule is nevertheless identical in both cases up to terms of first order in the anharmonicity. With a view to practical applications, especially in the context of ab initio calculations for the optical response where adiabatically switched-on fields are widely assumed, we demonstrate that a correct treatment of finite broadening parameters is essential to avoid spurious errors that may falsely suggest a violation of Miller's rule, and we illustrate this point by means of a numerical example. AU - Meyer, Maximilian Tim AU - Schindlmayr, Arno ID - 52723 JF - Journal of Physics B: Atomic, Molecular and Optical Physics SN - 0953-4075 TI - Derivation of Miller's rule for the nonlinear optical susceptibility of a quantum anharmonic oscillator ER - TY - CHAP AU - Niemann, Jan AU - Raneck-Kuhlmann, A. AU - Eickelmann, Birgit AU - Drossel, Kerstin AU - Buhl, Heike M. ED - Herzig, B. ED - Eickelmann, Birgit ED - Schwabl, F. ED - Schulze, J. ED - Niemann, Jan ID - 51127 T2 - Lehrkräftebildung in der digitalen Welt – zukunftsorientierte Forschungs- und Praxisperspektiven TI - Determinanten und Typen phasenübergreifenden Transfers in Communities of Practice der Lehrkräftebildung ER - TY - JOUR AB - In applications of piezoelectric actuators and sensors, the dependability and particularly the reliability throughout their lifetime are vital to manufacturers and end-users and are enabled through condition-monitoring approaches. Existing approaches often utilize impedance measurements over a range of frequencies or velocity measurements and require additional equipment or sensors, such as a laser Doppler vibrometer. Furthermore, the non-negligible effects of varying operating conditions are often unconsidered. To minimize the need for additional sensors while maintaining the dependability of piezoelectric bending actuators irrespective of varying operating conditions, an online diagnostics approach is proposed. To this end, time- and frequency-domain features are extracted from monitored current signals to reflect hairline crack development in bending actuators. For validation of applicability, the presented analysis method was evaluated on piezoelectric bending actuators subjected to accelerated lifetime tests at varying voltage amplitudes and under external damping conditions. In the presence of a crack and due to a diminished stiffness, the resonance frequency decreases and the root-mean-square amplitude of the current signal simultaneously abruptly drops during the lifetime tests. Furthermore, the piezoelectric crack surfaces clapping is reflected in higher harmonics of the current signal. Thus, time-domain features and harmonics of the current signals are sufficient to diagnose hairline cracks in the actuators. AU - Aimiyekagbon, Osarenren Kennedy AU - Bender, Amelie AU - Hemsel, Tobias AU - Sextro, Walter ID - 51518 IS - 3 JF - Electronics KW - piezoelectric transducer KW - self-sensing KW - fault detection KW - diagnostics KW - hairline crack KW - condition monitoring SN - 2079-9292 TI - Diagnostics of Piezoelectric Bending Actuators Subjected to Varying Operating Conditions VL - 13 ER - TY - CHAP AU - Ficara, Elena ED - Rutledge, Jonathan ID - 46201 SN - 9781032321097 T2 - Paradox and Contradiction in Theology TI - Dialectical Jesus ER - TY - CHAP AU - Ficara, Elena ED - Schäfer, Gregor ID - 46202 T2 - Hegel's Logic and Politics TI - Dialectics Between Logic and Politics ER - TY - JOUR AU - Göddertz, Nina ID - 48081 JF - Zeitschrift für Pädagogikunterricht TI - Didaktik der Sozialpädagogik – Entwicklungslinien, Diskurse und Herausforderungen. ER - TY - JOUR AU - Schön, Lena AU - Graßl, Benjamin AU - Giese, Henning ID - 49868 JF - Steuer und Wirtschaft TI - Die Kriterien und Zusammensetzung der EU-Blacklist als Grundlage des Steueroasen-Abwehrgesetzes – Eine kritische Würdigung ER - TY - CHAP AU - Peckhaus, Volker ED - Remenyi, Maria ED - Remmert, Volker ED - Schappacher , Norbert ID - 44861 T2 - Geschichte der Tagungen am MFO, 1944 bis 1960er Jahre TI - Die Neuformierung der Mathematischen Logik im Nachkriegsdeutschland ER -