Results 91 to 100 of about 6,698 (198)

Bionisch inspirierte Strahlungskühlung: Kühlen wie die Silberameise

open access: yesPhysik in unserer Zeit, EarlyView.
Wie kann ein wenige Millimeter großes Insekt helfen, Gebäude ohne Strom zu kühlen? Die Silberameise überlebt extreme Hitze mithilfe raffinierter Mikrostrukturen, die einen Großteil des Sonnenlichts zurückwerfen und gleichzeitig thermische Energie über Infrarotstrahlung in den Weltraum abführen.
Ille C. Gebeshuber, Markus Zimmerl
wiley   +1 more source

Neue Einblicke in ein Schlüsselmaterial für Planetenphysik, Fusion und Materialforschung: Flüssiger Kohlenstoff

open access: yesPhysik in unserer Zeit, EarlyView.
Mit Hilfe der ultrahellen Röntgenpulse des European XFEL und einem speziellen Hochenergielaser konnte die Struktur von flüssigem Kohlenstoff bei Drücken von über einer Million Atmosphären und Temperaturen von etwa 7000 K bestimmt werden. Dieser Ansatz offenbarte eine komplexe Flüssigkeit mit einer wasserähnlichen Struktur und im Mittel vier ...
Dominik Kraus, Ulf Zastrau
wiley   +1 more source

Längerlebige Loch‐Qubits durch stärkere Spin‐Bahn‐Kopplung: Schneller treiben, länger leben

open access: yesPhysik in unserer Zeit, EarlyView.
Halbleiter‐Spin‐Qubits in Quantenpunkten stehen vor dem vermeintlichen Dilemma, dass schnelle Spin‐Kontrolle durch stärkere Kopplung an das Umfeld nur auf Kosten der Kohärenz möglich ist. Da deren Eigenschaften empfindlich vom einbettenden elektrostatischen Potential abhängen, lässt sich dieser Gegensatz durch eine gezielte Feinabstimmung des ...
Miguel J. Carballido
wiley   +1 more source

Bruxelles, ville durable

open access: yesBrussels Studies, 2009
Pierre Vanderstraeten   +3 more
doaj   +1 more source

Linear optical wave energy redistribution methods for photonic signal processing

open access: yesnpj Nanophotonics
Manipulating the phase of an optical wave over time and frequency gives full control to the user to implement a wide variety of energy preserving transformations directly in the analogue optical domain. These can be achieved using widely available linear
Connor Rowe   +10 more
doaj   +1 more source

Synergy‐based crop suitability assessment for agrivoltaics: An easy‐to‐use traffic‐light framework for temperate climates

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Climate change and the growing demand for renewable energy are putting increasing pressure on land, as food production and solar power generation often compete for the same areas. In this study, we assessed which temperate‐region crops are best suited for agrivoltaics, a technology combining farming and solar electricity production on the same land. We
Salome Hauger   +6 more
wiley   +1 more source

Enhancing Tea Agrifood System Resilience Amid Geopolitical Tensions: A Resource Nexus‐Based System Dynamics Analysis

open access: yesSustainable Development, EarlyView.
ABSTRACT Geopolitical conflicts are increasingly threatening global food security, economic stability, and peace, impacting Tanzania's tea agrifood system. This study develops a quantitative Resource Nexus‐based system dynamics simulation model assessing the feedbacks and interdependencies among key environmental and socioeconomic resources shaping ...
Ally Mkumbukiy   +3 more
wiley   +1 more source

The Role of Interfacial Energetics and Defects on The Efficiency of Tin Perovskite Solar Cells

open access: yesSmall, EarlyView.
ABSTRACT Tin perovskites are emerging as a sustainable alternative to lead‐based photovoltaics, yet their efficiency remains limited by energy‐level mismatch and intrinsic instability from tin oxidation. Progress is further hindered by inconsistent electrical behavior, obscuring the true bottlenecks of device performance.
Mahmoud H. Aldamasy   +15 more
wiley   +1 more source

Hydrogen Bonding in Graphene

open access: yesSmall, EarlyView.
The hydrogen concentration and binding energies in large area graphene are determined from effusion measurements. The samples are grown using chemical vapor deposition using deuterated methane and deuterium as readily identifiable isotopes. Total hydrogen concentrations of 1.2 ‐ 6.9 × 1013 cm−2 are obtained.
Norbert H. Nickel   +3 more
wiley   +1 more source

Emergent Chaos‐Like Dynamics of Spin–Orbit‐Torque‐Driven Magnetic Transitions

open access: yesSmall, EarlyView.
By combining anisotropy‐engineered nanometer‐scale nucleation sites with time‐resolved x‐ray holography and micromagnetic modeling, magnetization dynamics are directly imaged, revealing chaos‐like fluctuations and skyrmion shedding and highlighting the intrinsic complexity of spin‐orbit torque driven systems.
L.‐M. Kern   +14 more
wiley   +1 more source

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