Open Access

Letzte Einträge:
2020-02-26
17:12
OpenAccess [FZJ-2020-01276] Journal Article
et al
Relation between activity‐induced intracellular sodium transients and ATP dynamics in mouse hippocampal neurons
The journal of physiology 597(23), 5687 - 5705 () [10.1113/JP278658]
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 [...]
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ddc:610
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2020-02-26
07:48
OpenAccess [FZJ-2020-01214] Contribution to a conference proceedings
et al
High-Brilliance Neutron Source Project
14th Int. Conf. on Heavy Ion Accelerator Technology, HIAT2018, LanzhouLanzhou, China, 22 Oct 2018 - 26 Oct 20182018-10-222018-10-26 JACoW Publishing, Geneva, Switzerland 117 - 121 () [10.18429/JACOW-HIAT2018-WEZAA01]
The High-Brilliance Neutron Source (HBS) project aims to design a scalable compact accelerator driven neutron source (CANS) which is competitive and cost-efficient. The concept allows one to optimize the whole facility including accelerator, target, moderators and neutron optics to the demands of individual neutron instruments. [...]
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2020-02-25
09:32
OpenAccess [FZJ-2020-01204] Journal Article

Systematic derivation of realistic spin models for beyond-Heisenberg solids
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. [...]
OpenAccess: Hoffmann_PRB2020 - Download fulltextPDF; PhysRevB.101.024418 - Download fulltextPDF Download fulltextPDF (PDFA);
ddc:530
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2020-02-21
11:33
OpenAccess [FZJ-2020-01181] Book/Report

Kernchemische Untersuchungen zur Produktion einiger medizinisch relevanter Strontium- und Rubidium-Isotope
[Juel-3931]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 3931, X, 101 p. ()
In palliative pain therapy of cancer patients with bone metastases the longer-lived $\beta^{-}$-emitter$^{89}$Sr (T$_{1/2}$ = 50.5 d) is often used. However, since corpuscular radiation cannot be measuredfrom outside the body, there is a lack of biodistribution data. [...]
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2020-02-21
11:13
OpenAccess [FZJ-2020-01177] Journal Article

Electrochemical Performance and Degradation Analysis of an SOFC Short Stack Following Operation of More than 100,000 Hours
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. [...]
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2020-02-21
11:11
OpenAccess [FZJ-2020-01176] Book/Report

Recent DDT simulations and criteria based on experimental and numerical results for hydrogen safety studies Part 2: HGF-H2 project
[Juel-3930]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 3930, III, 59 p. ()
In this report, we will first briefly describe the phenomena, underlying mechanisms andnecessary criteria of DDT, then summarize the experimental work on hydrogenexplosion performed at the SWL of RWTH Aachen. Then we will explain the CFDcodes SHOCKIN and AIXCO as well as the applications in the simulation of DDTprocesses.Studies performed at the SWL include three topics: 1) self-ignition phenomena;2) DDT mechanisms in axis-symmery geometry with periodic obstacles or a singleobstacle; and 3) detonation formation at the entrance to narrow gaps. [...]
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2020-02-21
09:28
OpenAccess [FZJ-2020-01171] Book/Report

CFD Software Optimierung und nicht-nukleare Anwendungen Part 2: HGF-H2 Projekt: Zusammenfassung
[Juel-3929]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 3929, 60 p. ()
This report describes the R&D work performed within the scope ofEC/HGF project activities concerning the numerical simulation of reacting flowin complex geometries. The aim is the refinement of numerical methods used incomputational fluid dynamics (CFD) by introducing highperformance computations(HPC) to analyse explosion processes in technical systems in more detail.Application examples concern conventional and nuclear energy systems,especially the safety aspects offuture hydrogen technology.The project work is mainly focused on the modelling of the accident-relatedbehaviour of hydrogen in safety enclosures regarding the distribution andcombustion of burnable gas mixtures, ranging from slow to fast or even rapidflames. [...]
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2020-02-21
08:39
OpenAccess [FZJ-2020-01167] Book/Report

Texturierte Zinkoxidschichten für Silizium-Dünnschichtsolarzellen
[Juel-3928]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 3928, IX, 150 p. ()
This thesis addresses the development of surface-textured ZnO:Al films prepared bymagnetron sputtering and post deposition wet chemical etching. Technological goal is thedesign of optimised light trapping schemes for amorphous (a-Si:H) and microcrystalline ($\mu$c-Si:H) silicon based thin film solar cells. [...]
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2020-02-21
08:17
OpenAccess [FZJ-2020-01166] Book/Report

Wachstum und Charakterisierung von Halbleiternanostrukturen auf vorstrukturiertem Substrat
[Juel-3926]
Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 3926, IV, 123 p. ()
Over the last two decades there has been intense theoretical and experimental interestin the physics of low-dimensional electron systems which are predicted to exhibit uniqueelectronic and optical properties. The reduced phase space available for electronscattering in one-dimensional systems - so called quantum wires - is expected to leadto a greatly enhanced mobility. [...]
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2020-02-20
15:09
Embargoed OpenAccess [FZJ-2020-01154] Journal Article
et al
Effect of random anisotropy on magnetization reversal in dipolarly coupled layered thin films
Magnetic thin films and multilayers offer many novel physical phenomena with tremendous potential for applications. Various growth processes and methods are in place to make homogeneous films. [...]
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ddc:530
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