Results 71 to 80 of about 176,247 (337)

From Single Atoms to Nanoparticles: Pathways Toward Efficient and Durable Pt/TiO2 Photocatalysts

Advanced Functional Materials, EarlyView.
Platinum single atoms on TiO2 nanosheets evolve into clusters and nanoparticles under ethanol photoreforming and thermal treatments. By controlling deposition and post‐treatments, particle size and location on specific facets are modulated. The study reveals how stability pathways determine efficiency, guiding the design of more durable photocatalysts.
Juan José Delgado, Enqi Bu, Yaning Han, Carlos López‐Cartes, Mónica Calatayud, Huiyan Pan, Xiaowei Chen   +6 more
wiley   +1 more source

Investigating Abiotic Sources of Spectral Variability From Multitemporal Hyperspectral Airborne Acquisitions Over the French Guyana Canopy

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Classifiers trained on airborne hyperspectral imagery are proficient in identifying tree species in hyperdiverse tropical rainforests. However, spectral fluctuations, influenced by intrinsic and environmental factors, such as the heterogeneity of ...
Colin Prieur, Antony Laybros, Giovanni Frati, Daniel Schlapfer, Jocelyn Chanussot, Gregoire Vincent   +5 more
doaj   +1 more source

A theoretical model for double diffusive phenomena in cloudy convection [PDF]

Annales Geophysicae, 2003
Using classical rheological principles, a model is proposed to depict the molecular diffusion in a moist-saturated dissipative atmosphere: due to the saturation condition existing between water vapor and liquid water in the medium, the equations ...
P.-A. Bois, A. Kubicki, A. Kubicki
doaj   +1 more source

The Effect of Shear Instability on the Transverse Circulation in the Atmosphere [PDF]

Proceedings of the National Academy of Sciences, 1940
In this paper it is shown that the shear fields on either side of the westerlies are dynamically unstable and will roll up to form discrete eddies. A study of the stable vortex systems into which these eddies might collect shows that a "vortex street" is stable for a certain range of the ratio of width to vortex spacing.
openaire   +2 more sources

Covalent Organic Frameworks for Photocatalytic CO2 Reduction: Metal Integration Principles, Strategies and Functions

Advanced Functional Materials, EarlyView.
Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He, Minxian Zhang, Jinqiang Zhang, Hongqi Sun, Shaobin Wang, Xiaoguang Duan   +5 more
wiley   +1 more source

A New Threshold Switching Device With Tunable Negative Differential Resistance Based on ErMnO3 Polymorphs

Advanced Functional Materials, EarlyView.
Polymorph engineering in ErMnO3 enables low‐voltage, forming‐free threshold switching with tunable negative differential resistance. Conducting orthorhombic regions embedded in an insulating hexagonal matrix provide controlled Joule‐heating‐enhanced Poole–Frenkel transport. The hexagonal phase prevents excessive heating and breakdown.
Rong Wu, Florian Maudet, Thanh Luan Phan, Wassim Hamouda, Richard Schroedter, Ahmet Samil Demirkol, Ronald Tetzlaff, Veeresh Deshpande, Catherine Dubourdieu   +8 more
wiley   +1 more source

Mesoscale convective systems in Spain: instability conditions and moisture sources involved [PDF]

Advances in Geosciences, 2008
Source-receptor water vapor content areas are analyzed for a particular case of deep mesoscale convective system (MCS) developed over the Mediterranean margin of Spain in October 1982.
S. Queralt, E. Hernandez, D. Gallego, P. Lorente   +3 more
doaj  

An Engineered Living Material With Pro‐Angiogenic Activity Inducible by Near‐Infrared Light

Advanced Functional Materials, EarlyView.
NIR‐responsive engineered living materials (ELMs) for controlled angiogenesis: Near‐infrared (800 nm) light activates engineered probiotic bacteria within alginate‐based living materials to secrete a blood vessel‐regenerating protein. The released protein promotes pro‐angiogenic effects in endothelial networks and chick chorioallantoic membranes.
Anwesha Chatterjee, Stefanie S. M. Meier, Sara Trujillo, Andreas Möglich, Shrikrishnan Sankaran   +4 more
wiley   +1 more source

Long-term continuous observations of the horizontal inhomogeneity in lower-atmospheric water vapor concentration using A-SKY/MAX-DOAS

Progress in Earth and Planetary Science
We conducted long-term (2017–2022) continuous observations of water vapor concentration in the lower atmosphere (0–1 km) over Tsukuba and Chiba, Japan, using the multi-axis differential optical absorption spectroscopy (MAX-DOAS) technique within the ...
Shunya Mizobuchi, Hitoshi Irie, Shingo Shimizu   +2 more
doaj   +1 more source

Theoretical flow regime diagrams for the AGCE [PDF]

The major criterion for the design of the Atmospheric General Circulation Experiment is that it be possible to realize strong baroclinic instability in the apparatus. A spherical annulus configuration which allows only steady basic state flows was chosen
Fowlis, W. W., Kopecky, K. J., Miller, T. L., Roberts, G. O.   +3 more
core   +1 more source