Results 51 to 60 of about 515,079 (210)

Numerical homogenization of the viscoplastic behavior of snow based on X-ray tomography images [PDF]

open access: yesThe Cryosphere, 2017
While the homogenization of snow elastic properties has been widely reported in the literature, homogeneous rate-dependent behavior responsible for the densification of the snowpack has hardly ever been upscaled from snow microstructure.
A. Wautier   +6 more
doaj   +1 more source

Environmental and seasonal filtering of taxonomic, functional and phylogenetic diversity patterns of mountain butterflies in a prime butterfly area, Greece

open access: yesInsect Conservation and Diversity, EarlyView.
Forest clearings support butterfly communities comparable to mountainous grasslands in alpha‐diversity and conservation value, yet remain compositionally distinct. Generalized linear models (GLMs) showed three key habitat predictors shaping multifaceted diversity and community composition: herb/grass height, flowerhead abundance and elevation.
Konstantina Nasiou   +4 more
wiley   +1 more source

Implications of spatial distributions of snow mass and melt rate for snow-cover depletion: observations in a subarctic mountain catchment [PDF]

open access: yes, 2004
Spatial statistics of snow water equivalent (SWE) and melt rate were measured using spatially distributed, sequential ground surveys of depth and density in forested, shrub and alpine tundra environments over several seasons within a 185 km(2) mountain ...
Pomeroy, J   +2 more
core   +1 more source

Effects of Surface Abrasion With Airborne‐Particles and Surface Etching With Hydrofluoric Acid on Color Difference and Translucency of Nano‐Hybrid Ceramic

open access: yesJournal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objectives To evaluate the effects of alumina airborne‐particle abrasion, glass‐bead airborne‐particle abrasion, and hydrofluoric acid etching of intaglio surfaces on the color difference and translucency of a nano‐hybrid ceramic after cementation to resin abutment specimens, and to analyze the relationships between surface roughness and these
Hyuk‐Joon Lee   +3 more
wiley   +1 more source

A microstructural approach to model heat transfer in snow [PDF]

open access: yesGeophysical Research Letters, 2005
The relation between heat flow through snow and microstructure is crucial for the comprehension and modeling of thermophysical, chemical, and mechanical properties of snow. This relationship was investigated using heat flux measurements combined with a microstructural numerical approach.
Kaempfer, T.U.   +2 more
openaire   +2 more sources

Microstructure-based simulations of the viscous densification of snow and firn

open access: yesThe Cryosphere, 2023
Abstract. Accurate models for the viscous densification of snow and firn under mechanical stress are of primary importance for various applications, including avalanche prediction and the interpretation of ice cores. Formulations of snow and firn compaction in models are still largely empirical, instead of using microstructures from micro-computed ...
K. Fourteau   +4 more
openaire   +5 more sources

Numerical simulation of elastic stress in the microstructure of snow [PDF]

open access: yesAnnals of Glaciology, 2004
AbstractThe mechanical properties of snow depend on its microstructure. The fabric of snow was reconstructed in three dimensions using serial sections or X-ray microtomography. A voxel-based finite-element model, with the elements based on the microstructure and ice as the material, was used to calculate the stress distribution in the snow.
openaire   +2 more sources

Advanced Sorbent Materials in Solid‐Phase Extraction: A Decade of Innovation and Future Perspectives

open access: yesChemistry–Methods, Volume 6, Issue 8, August 2026.
This review systematically summarizes five families of advanced sorbent materials for solid‐phase extraction (SPE): nanocarbons, porous frameworks (MOFs/COFs), smart polymers, biomass‐derived sorbents, and multifunctional composites. Key molecular interactions (π–π stacking, hydrogen bonding, electrostatic attraction, host–guest recognition) are ...
Xingchen Wang   +4 more
wiley   +1 more source

Snow water equivalent retrieved from X- and dual Ku-band scatterometer measurements at Sodankylä using the Markov Chain Monte Carlo method [PDF]

open access: yesThe Cryosphere
Radar at high frequency is a promising technique for fine-resolution snow water equivalent (SWE) mapping. In this paper, we extend the Bayesian-based Algorithm for SWE Estimation (BASE) from passive to active microwave (AM) application and test it using ...
J. Pan   +5 more
doaj   +1 more source

CO2‐Derived Architected Carbons for Sustainable Energy Conversion and Storage

open access: yesEcoMat, Volume 8, Issue 8, August 2026.
CO2‐derived carbon architectures are systematically engineered via thermochemical, electrochemical, and hybrid pathways to tailor electronic structure, interfacial charge transfer, and catalytic functionality. These materials demonstrate versatile performance across electrocatalysis and energy storage, establishing a coherent framework that links ...
Mohd Ubaidullah   +7 more
wiley   +1 more source

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