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Aufsatz
A Stable Crystalline N-Heterocyclic Carbene with a 1,1’ - Ferrocenylene Backbone and Benzylic N-Substituents
(2022-12-08)
Two ferrocene-based NHCs of the type fc[(NR)₂C:] (1ᴿ; fc=1,1’-ferrocenylene) containing benzylic N-substituents were synthesised from the corresponding formamidinium compounds 1ᴿH[BF₄] by reaction with LiN(SiMe₃)₂. In the case of R=CH₂Ph (Bn), the carbene was characterised through trapping reactions with sulfur and selenium, which afforded fc[(NBn)₂CS] (1ᴮⁿS) and fc[(NBn)₂CSe] (1ᴮⁿSe), respectively. A thermally stable carbene was obtained with R=CH₂Mes (Bn*). Its reaction with sulfur and selenium afforded fc[(NBn*)₂CS] ...
Aufsatz
The correlation of honesty-humility and learning goals with academic cheating
(2022-12-05)
Academic cheating is a problem that affects many educational institutions and has become increasingly significant with the new challenges of online education. Recent studies have found that learning goals are correlated with cheating behavior among students. In this study, we investigated whether learning goals are still a predictor of cheating behavior when controlling for students’ Honesty-Humility (emanated from the HEXACO model of personality) within a sample of 311 German university students. Regrading students’ ...
Aufsatz
A monolithic approach toward coupled electrodynamic–thermomechanical problems with regard to weak formulations
(2021-11-11)
Weak formulations of boundary value problems are the basis of various numerical discretization schemes. They are classically derived applying the method of weighted residuals or a variational principle. For electrodynamical and caloric problems, variational approaches are not straightforwardly obtained from physical principles like in mechanics. Weak formulations of Maxwell’s equations and of energy or charge balances thus are frequently derived from the method of weighted residuals or tailored variational approaches. ...
Aufsatz
Miniaturized interferometric confocal distance sensor for surface profiling with data rates at ultrasonic frequencies
(2023-01-12)
Point-wise measuring profilometers like the tactile stylus instruments or optical sensors are established measurement tools in science and industry to measure and characterize surface textures. We present a fiber-coupled laser interferometric confocal distance sensor for surface profiling. The sensor is characterized by small geometric dimensions and by its high lateral
scanning speed. The ability to measure specularly reflecting and rough surface textures are demonstrated by performing several measurements on a ...
Aufsatz
Model-based investigations of ferroelectric energy harvesting with regard to an improvement of life span and operability
(2023-02-13)
A new ferroelectric energy harvesting concept is investigated theoretically, based on a thermo-electromechanical multiscale constitutive framework in connection with the so-called condensed method. Taking advantage of comparatively large changes of strain and polarization due to domain switching, the electric output is higher compared to what is commonly known as
piezoelectric energy harvesting. Dissipative self-heating and augmented damage accumulation, on the other hand, may impede the operability of the harvesting ...
Aufsatz
Einblicke in die Forschung – Bisheriger (Un‑)Wissensstand über den Nutzen von Supervision für Coaches und Psychotherapeut*innen
(2022-06-27)
In diesem Artikel der Zeitschrift für Psychodrama und Soziometrie (ZPS) werden die Ergebnisse aktueller Forschung zu Supervision in der Psychotherapie und im Coaching vorgestellt. Im Vordergrund steht die Frage nach dem Nutzen der Supervision für Supervisand*innen und ihre Klient*innen im jeweiligen Anwendungskontext. Relevante empirische Studien werden beschrieben, Wissenslücken betrachtet und Implikationen für zukünftige Forschung und die Praxis von Berater*innen werden abgeleitet.
Aufsatz
Lateral resolution enhanced interference microscopy using virtual annular apertures
(2023-01-27)
The lateral resolution in microscopic imaging generally depends on both, the wavelength of light and the numerical aperture of the microscope objective lens. To quantify the lateral resolution Ernst Abbe considered an optical grating illuminated by plane waves. In contrast, the Rayleigh criterion holds for two point sources or point scatterers separated by a lateral distance, which are
supposed to emit spherical waves. A portion of each spherical wave is collected by the objective lens and results in an Airy disc ...
Aufsatz
Theoretical study of spin polarization in multiphoton ionization of Xe
(2023-04-21)
Spin polarization in the multiphoton above-threshold ionization of 5p3/2- and 5p1/2-electrons of Xe with intense 395nm, circularly polarized laser pulses, is investigated theoretically. For this purpose, we solve the time-dependent Schrödinger equation on the basis of spherical spinors. We, thus, simultaneously propagate the spin-up and spin-down single-active-electron wave packets, driven by the laser pulses in the ionic potential, which includes the spin–orbit interaction explicitly. The present theoretical results ...
Aufsatz
What Helps the Unemployed to Stay Healthy? A Qualitative Study of Coping with the Negative Effects of Job Loss
(2022-05-22)
Background
A variety of empirical studies have shown the negative effects of unemployment on health. A research gap exists regarding salutogenic factors and successful coping strategies to master involuntary job loss and unemployment with the least damage to health. Hence, this study aims at generating a deeper understanding of coping with unemployment and maintaining health.
Design and methods
We conducted problem-centered guideline interviews with 21 unemployed people. For the analysis of the interviews, we ...
Rezension
Siefken, Sven T. (Hrsg.) (2021): Wahlkreisarbeit von Bundestagsabgeordneten. Parlamentarische Repräsentation in der Corona-Krise
(2023-01-11)
Rezension von Nadin Fromm zu: Siefken, Sven T. (Hrsg.) (2021): Wahlkreisarbeit von Bundestagsabgeordneten. Parlamentarische Repräsentation in der Corona-Krise. Wiesbaden: Springer VS. 150 Seiten. 54,99 €