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In-situ monitoring of epitaxial ferroelectric thin-film growth
(2021)Journal of Physics: Condensed MatterIn ferroelectric thin films, the polarization state and the domain configuration define the macroscopic ferroelectric properties such as the switching dynamics. Engineering of the ferroelectric domain configuration during synthesis is in permanent evolution and can be achieved by a range of approaches, extending from epitaxial strain tuning over electrostatic environment control to the influence of interface atomic termination. Exotic ...Review Article -
Genome-scale phylogenies reveal relationships among Parastagonospora species infecting domesticated and wild grasses
(2021)PersooniaSeveral plant pathogenic Parastagonospora species have been identified infecting wheat and other cereals over the past 50 years. As new lineages were discovered, naming conventions grew unwieldy and the relationships with previously recognized species remained unclear. We used genome sequencing to clarify relationships among these species and provided new names for most of these species. Six of the nine described Parastagonospora species ...Journal Article -
Microfacies and C/O-isotopes in lacustrine dolomites reflect variable environmental conditions in the Germanic Basin (Arnstadt Formation, Upper Triassic)
(2021)Austrian Journal of Earth SciencesThe conditions in ancient evaporative environments conducive to authigenic carbonate (especially dolomite [CaMg(CO3)(2)]) formation are still insufficiently understood. Insights from microfacies analysis can help to constrain the conditions in these environments. We provide a brief overview of the microfacies association and carbon and oxygen isotope compositions of dolomite beds intercalated in a claystone-rich succession from the Norian ...Journal Article -
14C Dating of mortar from ruins of an early medieval church hohenrätien GR, Switzerland
(2020)GeochronometriaNumerous ruins around the world lack the radiometric dating due to the scarcity of organic carbon. Here, we present results of radiocarbon dating of mortar samples from an early Medieval church Hohenrätien GR, Switzerland, which was dated to the early 6th century, based on typology. The method of dating mortars, which is currently applied at the ETH laboratory, involves sieving the crushed mortar, selection of grain size 45−63 μm and ...Journal Article -
Modelling of variable-speed refrigeration for fast-frequency control in low-inertia systems
(2020)IET Smart GridIn modern power systems, shiftable loads contribute to the flexibility needed to increase robustness and ensure security. Thermal loads are among the most promising candidates for providing such service due to the large thermal storage time constants. This study demonstrates the use of variable-speed refrigeration (VSR) technology, based on brushless DC motors, for the fast-frequency response. First, the authors derive a detailed dynamic ...Journal Article -
Application of mouse parthenogenetic haploid embryonic stem cells as a substitute of sperm
(2020)Journal of Visualized Experiments. JoVEIn organisms with sexual reproduction, germ cells are the source of totipotent cells that develop into new individuals. In mice, fertilization of an oocyte by a spermatozoon creates a totipotent zygote. Recently, several publications have reported that haploid embryonic stem cells (haESCs) can be a substitute for gametic genomes and contribute to embryos, which develop into mice. Here, we present a protocol to apply parthenogenetic haESCs ...Journal Article -
Testing of asymptomatic individuals for fast feedback-control of COVID-19 pandemics
(2020)Physical BiologyWe argue that frequent sampling of the fraction of a priori non-symptomatic but infectious humans (either by random or cohort testing) significantly improves the management of the COVID-19 pandemic, when compared to intervention strategies relying on data from symptomatic cases only. This is because such sampling measures the incidence of the disease, the key variable controlled by restrictive measures, and thus anticipates the load on ...Journal Article -
The Roman amphitheatre in mérida, Spain -Augustan or Flavian? Radiocarbon dating results on mortar carbonate
(2020)GeochronometriaFour lime mortar samples from the Mérida amphitheatre in Spain were dated in 2001 and re-dated in 2019 with refined dating methods and focus on carbon dioxide that was released in late CO2 fractions when dissolved in phosphoric acid. The samples were difficult to date because they contained highly soluble, young carbonate contamination that dominated the carbon dioxide from the early stages of the reaction with the acid in the hydrolysis ...Journal Article -
A High-Order Integrator for the Schrödinger Equation with Time-Dependent, Homogeneous Magnetic Field
(2020)The SMAI Journal of Computational MathematicsWe construct a family of numerical methods for the Pauli equation of charged particles in a time-dependent, homogeneous magnetic field. These methods are described in a general setting comprising systems of multiple particles and extend the usual splitting and Fourier grid approach. The issue is that the magnetic field causes charged particles to rotate. The corresponding rotations of the wave function are highly incompatible with the ...Journal Article -
Modeling deformed transmission lines for continuous strain sensing applications
(2019)Measurement Science and TechnologyTransmission lines are essential components in various signal and power distribution systems. In addition to their main use as connecting elements, transmission lines can also be employed as continuous sensors for the measurement and detection of external influences such as mechanical strains and deformations. The measuring principle is based on deformation-induced changes of the characteristic impedance. Reflections of an injected test ...Journal Article