Journal Article

Excitatory neuronal activity results in the influx of Na+ through voltage‐ and ligand‐gated channels. Recovery from accompanying increases in intracellular Na+ concentrations ([Na+]i) is mainly mediated by the Na+/K+‐ATPase (NKA) and is one of the major energy‐consuming processes in the brain [...]

We present a systematic derivation of effective lattice spin Hamiltonians derived from a rotationally invariant multiorbital Hubbard model including a term ensuring Hund's rule coupling. The Hamiltonians are derived down-folding the fermionic degrees of freedom of the Hubbard model into the proper low-energy spin sector using Löwdin partitioning, which will be outlined in detail for the case of two sites and two orbitals at each site. [...]

Sustainable arable cropping relies on repeated liming. Yet, the associated increase in soil pH can reduce the availability of iron (Fe) to plants. [...]

This paper aims at performing a parametric analysis of the thermoeconomics costs associated with an integrated solid oxide fuel cell (SOFC) system with a vapour-adsorption refrigeration (VAR) system. Particular emphasis is put on the cost of the SOFC’s product (i.e. [...]

From August 2007 to January 2019, a two-layer solid oxide fuel cell (SOFC) short stack of a planer design with zirconia-based, anode-supported cells (ASC) and ITM interconnectors (with 26% chromium content) was tested with hydrogen and compressed air at a furnace temperature of 700°C for more than 100,000 hours, of which ~93,000 were in constant current mode, with a current density of 0.5 Acm−2 and with a fuel utilization of 40%. The calculated voltage degradation rate slowly decreased, from ~8.0 mV/kh (~1.0%/kh) for the first 40,000 h to ~1.4 mV/kh (~0.2%/kh) for the subsequent operation under load, indicating different dominating degradation mechanisms. [...]