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Open AccessMind the gap – Forderungen für eine verbesserte transitionspsychiatrische Versorgung aus Expert:innenperspektive
Der Übergang von der Kinder- und Jugendpsychiatrie (KJP) in die Erwachsenenpsychiatrie (EP) geht mit einer Reihe von Herausforderungen und in vielen Fällen mit Behandlungsunterbrechungen einher. Die Transition...
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A New Era of Earth Observation for the Environment: Spatio-Temporal Monitoring Capabilities for Land Degradation
Land degradation can be defined as a persistent reduction or loss of the biological and economic productivity resulting from climatic variations and human activities. To quantify relevant surface changes with ...
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Dynamics and Drivers of Net Primary Production (NPP) in Southern Africa Based on Estimates from Earth Observation and Process-Based Dynamic Vegetation Modelling
Terrestrial net primary production (NPP) is a fundamental Earth system variable that also underpins resource supply for all animals and fungi on Earth. We analysed recent past NPP dynamics and its drivers acro...
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Observational Support for Regional Policy Implementation: Land Surface Change Under Anthropogenic and Climate Pressure in SALDi Study Sites
South Africa is a vast, very diverse and dynamic country experiencing rapidly changing demands for the utilization of its natural resources. At the same time, global climate change and related processes affect...
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Article
Refraction of light by light in vacuum
In very intense electromagnetic fields, the vacuum refractive index is expected to be modified due to nonlinear quantum electrodynamics (QED) properties. Several experimental tests using high intensity lasers ...
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Streufeld-immune Schaltkreise für magnetische Positionssensoren
Berührungslose Positionssensoren finden in vielen Bereichen des Automobils ihre Verwendung und werden größtenteils als magnetische Sensoren ausgeführt. Im Zusammenhang mit sicherheitskritischen Anwendungen gew...
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Multi-Source Data Integration and Analysis for Land Monitoring in Siberia
Land monitoring is a key issue in Earth system sciences analyzing environmental changes. To generate knowledge about changes, e.g., by decreasing uncertainties in the products and to build confidence in land c...
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Multi-Scale Vegetation and Water Body Map** of the Northern Latitudes in Siberia with Optical Remote Sensing
The Arctic ecosystem is highly vulnerable to modification within the climate system. Increasing greenhouse gas emissions, e.g. from melting permafrost soils, are assumed to result in positive feedback mechanis...
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Article
Reply to the Comment on: The quantum vacuum as the origin of the speed of light
We reply to the comment by Schiller on our paper “The quantum vacuum as the origin of the speed of light” [M. Urban et al., Eur. Phys. J. D 67, 58 (2013)]. We further detail our model and explain why the limits p...
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Article
The quantum vacuum as the origin of the speed of light
We show that the vacuum permeability μ 0 and permittivity ε 0 may originate from the magnetization and the polarization of continuously appearing and disappearing fermion pairs. We...
