In the present work, the charge carrier spin dynamics in lead halide perovskites APbX3, with X = {I,Br,Cl} are studied. The lead halide perovskites are distinguished with respect to the groups of purely inorganic perovskites with A = Cs and hybrid organic inorganic ones with A = {MA,FA} (methylammonium and formamidinium), as well as their size, i. e. macroscopic single crystals or nano crystals. The spin dynamics of the charge carriers, electrons and holes, are mainly investigated using ...

Graphics cards that are equipped with Tensor Core units designed for AI applica tions, for example the NVIDIA Ampere A100, promise very high peak rates concerning their computing power (156 TFLOP/s in single and 312 TFLOP/s in half precision in the case of the A100). This is only achieved when performing arithmetically intensive operations such as dense matrix multiplications in the aforementioned lower precision, which is an obstacle when trying to use this hardware for solving linear sy...

In this contribution, we shall be concerned with the question of wellposedness of thixo viscoplastic flow problems in context of FEM approximations. We restrict our analysis to a quasi Newtonian modeling approach with the aim to set foundations for an efficient monolithic Newton multigrid solver. We present the wellposedness of viscoplastic subproblems and structure subproblems in parallel/independent fashion showing the possibility for a combined treatment. Then, we use the fixed point the...

Additive manufacturing (AM) using the powder bed fusion (PBF) process is building up the components layer by layer, which enables the fabrication of complex 3D structures with unprecedented degrees of freedom. Due to the high cooling rates of the AM process, fine microstructures are generated. This leads to an improvement in quasistatic properties such as tensile strength, whereas the fatigue strength is comparable to that of conventionally manufactured metal or even reduced. This is due to t...

Global water resources are currently under unprecedented stress, which is projected to increase due to the influence of multiple factors. Therefore, changes in governance are urgently required to improve water management and water use efficiency while maintaining the health of river systems and their water quantity and quality. Data is crucial in this process; however, most rivers in the world remain ungauged, and in data-scarce regions, the hydrometric and hydrometeorological networks of sta...

Menschen, die nach Deutschland einwandern, bringen die Ernährungsgewohnheiten des Heimatlandes mit. Sie kommen in den Kontakt mit in Deutschland üblichen Ernährungsgewohnheiten und erleben möglicherweise eine neue soziale Lage, da sie häufig in der unteren sozialen Schicht starten. Gleichzeitig findet ein monetärer Aufstieg statt. Dieser Einfluss hat unterschiedlich starke Rückwirkungen auf die Ernährungsgewohnheiten der Migranten. Durch die großen nationalen Verzehrsdokumentationsstudien für...

Managing climate change is synonymous to managing cities and their growth. To shoulder the challenge of climate change adaptation, informal settlement upgrading in the global south has amounted to the importance of being attuned with the growth of its city and region at large. Changing the paradigm of on-site upgrading to being community-driven and city-led with domestic funding unlocks potentials for community resilience building, especially in countries that strive for inclusive growth. Thi...

Der Beitrag beschreibt die Verkehrsstrukturen in den internationalen Untersuchungsstädten des Forschungsprojekts WIVER. Neben den allgemeinen städtischen und verkehrlichen Strukturen werden die Motorisierungsentwicklung und Verkehrsmengenentwicklung betrachtet. In Zürich und Wien ist die Zunahme des Pkw-Bestandes trotz steigender Einwohnerzahlen deutlich abgeschwächt, die Verkehrsbelastungen im MIV sogar leicht rückläufig. Dem stehen eine zunehmende Nutzung des jeweils deutlich ausgebauten öf...

Dieser Beitrag analysiert die Entwicklung der privaten Pkw-Bestände und der damit verbundenen Motorisierungsquoten in deutschen Städten und Gemeinden mit Fokus auf den Untersuchungsstädten des Forschungsprojekts. Basierend auf Daten des Kraftfahrt-Bundesamtes von 2013 bis 2021 zeigen die Analysen, dass in nahezu allen Städten die Motorisierungsquote und ausnahmslos in allen Städten der private Pkw-Bestand gestiegen ist. Im Vergleich zu anderen Städten mit ähnlichen Rahmenbedingungen (Einwohne...