Results 31 to 40 of about 1,076 (175)
Using Ultrasonic Waves to Determine the Microstructure of Snow
Frontiers in Earth Science, 2020 Acoustic signals interact with the physical structure of porous media, are particularly sensitive to porosity and tortuosity, and can be used to measure physical properties in a non-destructive manner. Given the fragile nature of freshly fallen snow, non-contact, non-destructive characterization methods made possible via acoustic signals, are desirable.
Ross Lieblappen +5 more
openaire +2 more sources
Changes in microstructure of snow under large deformations [PDF]
Journal of Glaciology, 1991 AbstractA set of microstructural variables is selected to characterize the behavior of snow. Corresponding mathematical relations from quantitative stereology theory are presented along with relations and techniques required for numerical evaluation. An experimental investigation is carried out to determine changes in these variables for snow subjected
Michael Q. Edens, Robert L. Brown
openaire +1 more source
Spectral reflectance behavior of different boreal snow types
Journal of Glaciology, 2019 Spectral reflectance of natural snow samples representing various stratigraphies was investigated in a controlled dark laboratory environment. Mean and Std dev.
Henna-Reetta Hannula, Jouni Pulliainen
doaj +1 more source
Field measurements of multiaxial strength of weak snow layers
Journal of GlaciologyDry-snow slab avalanche release is initiated by a failure in a buried weak layer. Quantifying the multiaxial strength of weak snow layers is therefore essential, yet field measurements remain scarce compared to laboratory or numerical studies.
Melin Walet +8 more
doaj +1 more source
Comparing measurements of snow mechanical properties relevant for slab avalanche release
Journal of Glaciology, 2019 Snow properties relevant to the fracture processes involved in dry-snow slab avalanche release include weak layer specific fracture energy, slab elastic modulus and density.
BENJAMIN REUTER +4 more
doaj +1 more source
Vapor flux and recrystallization during dry snow metamorphism under a steady temperature gradient as observed by time-lapse micro-tomography [PDF]
The Cryosphere, 2012 Dry snow metamorphism under an external temperature gradient is the most common type of recrystallization of snow on the ground. The changes in snow microstructure modify the physical properties of snow, and therefore an understanding of this process is ...
B. R. Pinzer +2 more
doaj +1 more source
Exploring the potential of forest snow modeling at the tree and snowpack layer scale [PDF]
The CryosphereBoreal and sub-alpine forests host seasonal snow for multiple months per year; however, snow regimes in these environments are rapidly changing due to rising temperatures and forest disturbances.
G. Mazzotti +7 more
doaj +1 more source
Studying Snow Failure With Fiber Bundle Models
Frontiers in Physics, 2020 Snow is a highly porous material with properties that may strongly differ depending on the environmental conditions. On slopes, the layered snowpack may fail and avalanches occur.
Achille Capelli +2 more
doaj +1 more source
Advanced Science, EarlyView.The WTP is a key component of static drainage PEMFCs, enabling cathode water removal and gas sealing through capillary forces. This work investigates the mechanisms governing WTP drainage and sealing performance and develops predictive approaches for WTP design optimization.
Mengdi Guo +3 more
wiley +1 more source
Carbon Energy, EarlyView.Optimized ITO back contact with pre‐Ga supply growth and Ag incorporation suppresses GaOx formation and interface recombination in bifacial CIGS solar cells. The devices achieve 17.25% front and 5.77% rear efficiency, delivering record bifacial power density up to 32.26 mW cm−2 in 4T perovskite/CIGS tandem architectures under enhanced albedo ...
Amanat Ali +13 more
wiley +1 more source