Results 191 to 200 of about 155,353 (315)

Smart and Flexible Optical Solar Reflectors for Passive Radiative Cooling Regulation in Space Using a W:VO2 Metasurface

open access: yesNanophotonics, Volume 15, Issue 3, 12 February 2026.
Passive regulation of thermal management in space relies on engineered radiative coatings that can vary their emissivity with temperature. Here a smart and flexible solution is presented combining a W:VO2 metasurface with a low‐emissivity solar reflector. This highly durable first‐surface coating survives space qualification tests and offers attractive
Mirko Simeoni   +13 more
wiley   +1 more source

Electrical Transport of Nb‐Doped MoS2 Homojunction P–N Diode: Investigating NDR and Avalanche Effect

open access: yesSmall, Volume 22, Issue 9, 12 February 2026.
Niobium (Nb)‐doped molybdenum disulfide (MoS2) p‐type–n‐type (p–n) homojunction diodes are engineered using thickness‐controlled homo‐interfaces. Current–voltage (I–V) characteristics reveal gate‐tunable rectification, wavelength‐dependent photoresponse, and low‐bias switching.
Ehsan Elahi   +10 more
wiley   +1 more source

Silicate and Carbonate Weathering Perturbation at the Eocene‐Oligocene Transition Recorded by Mg Isotopes

open access: yesGeochemistry, Geophysics, Geosystems, Volume 27, Issue 2, February 2026.
Abstract During the Eocene‐Oligocene Transition (ca. 34 Ma), the Earth underwent a dramatic decline in atmospheric CO2, global cooling, a deepening of the carbonate compensation depth (CCD), and the formation of a permanent ice sheet on Antarctica. The expansion of Antarctic glaciers eroded the underlying bedrock and increased the weathering flux to ...
Adam D. Sproson   +6 more
wiley   +1 more source

Reconstructing Environmental and Microbial Ecosystem Changes Across the Permian–Triassic Mass Extinction at Lusitaniadalen, Svalbard

open access: yesPaleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract The Permian–Triassic environmental crisis triggered fundamental changes in marine ecosystems, culminating in the most severe biodiversity crisis of the Phanerozoic. Yet, the environmental and geochemical conditions governing the crisis and ecosystem recovery remain debated.
S. Z. Buchwald   +17 more
wiley   +1 more source

Multifunctional rGO/Y<sub>2</sub>O<sub>3</sub>@hydroxyapatite bioceramics: structural, optical, and biomedical properties. [PDF]

open access: yesRSC Adv
Kamoun EA   +8 more
europepmc   +1 more source

Outsourced eye care in the Finnish capital region: Switching from fee‐for‐service to bundled payment model

open access: yesActa Ophthalmologica, Volume 104, Issue 1, Page 114-129, February 2026.
Abstract Purpose The demand for specialised eye care has quadrupled over the last two decades, driven by an aging population and the advent of new treatments. This surge has led to increased outsourcing by the Helsinki and Uusimaa Hospital District (HUS) Eye Hospital, initially relying on a fee‐for‐service model. This model, however, has been marked by
Susanna Moisander   +7 more
wiley   +1 more source

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