Results 11 to 20 of about 12,284 (247)

How Are Tornadic Supercell Soundings Significantly Different From Nearby Baseline Environments?

open access: yesGeophysical Research Letters, 2023
This study explores how tornadic supercell soundings significantly differ from the same‐location and same‐hour baseline environment soundings, sampled from the days prior to or following the event. Permutation testing is used to identify whether sounding‐
Zhanxiang Hua, Alexandra Anderson‐Frey
doaj   +1 more source

Systematic derivation of maximally orthogonalized supercells

open access: yesScience and Technology of Advanced Materials: Methods, 2022
Generation of supercells with a desirable size and reasonable geometry, such as basis vectors with a similar length and are close to orthogonality, is useful for defect calculations and dilute alloy calculations. Identification of relations between basis
Yoyo Hinuma
doaj   +1 more source

Observational Characteristics of A Hybrid Severe Convective Event in the Sichuan-Tibet Region

open access: yes应用气象学报, 2021
The Sichuan-Tibet Region is a key area for the development of western China, where severe convective weather such as thunderstorm gales occur frequently. However, due to the complex terrains, synoptic systems, and the lack of meteorological observations,
Wang Hong, Li Ying, Wen Yongren
doaj   +1 more source

Assessing the Accuracy of 3D-VAR in Supercell Thunderstorm Forecasting: A Regional Background Error Covariance Study

open access: yesAtmosphere, 2023
Data assimilation (DA) integrates observational data with numerical weather predictions to enhance weather forecast accuracy. This study evaluates three regional background error (BE) covariance statistics for numerical weather prediction (NWP) via a ...
Ioannis Samos   +2 more
doaj   +1 more source

Supercell refinement: a cautionary tale [PDF]

open access: yesActa Crystallographica Section D Structural Biology, 2019
Theoretically, crystals with supercells exist at a unique crossroads where they can be considered as either a large unit cell with closely spaced reflections in reciprocal space or a higher dimensional superspace with a modulation that is commensurate with the supercell.
Jeffrey Lovelace   +3 more
openaire   +3 more sources

Impact of the Streamwise Vorticity Current on Low‐Level Mesocyclone Development in a Simulated Supercell

open access: yesGeophysical Research Letters, 2023
Results from a large eddy simulation of a tornadic supercell developing in a horizontally homogeneous environment are presented which clearly illustrate a connection between low‐level mesoyclone development and the development of a streamwise vorticity ...
Catherine A. Finley   +3 more
doaj   +1 more source

Validation of Analytical Solutions for Predicting Drilled Pile Behaviour under Bi-Directional Static Load Tests

open access: yesGeosciences, 2022
A bi-directional static load test (BDSLT) is one of the most effective methods for accurately estimating pile bearing capacity, in which the test pile is divided into two portions by activating the single-loading device welded along the pile shaft. BDSLT,
Runshen Wang   +4 more
doaj   +1 more source

Urbanization may enhance tornado potential: A single case report

open access: yesFrontiers in Earth Science, 2023
Tornadoes pose a risk of catastrophic economic loss and casualty in the United States. Modification of land use by urbanization alters the meteorological conditions that may impact tornado formation and intensification processes.
Jiwen Fan   +4 more
doaj   +1 more source

Graphene-based Terahertz closed-stopband composite right/left-handed leaky-wave antennas [PDF]

open access: yesE3S Web of Conferences, 2021
A simple scheme for the realization of the terahertz (THz) fundamental-mode closed-stopband composite right/left-handed leaky-wave antennas (CRLH LWAs) is presented.
Gao Muzhi   +3 more
doaj   +1 more source

Polarons from First Principles, without Supercells [PDF]

open access: yesPhysical Review Letters, 2019
We develop a formalism and a computational method to study polarons in insulators and semi-conductors from first principles. Unlike in standard calculations requiring large supercells, we solve a secular equation involving phonons and electron-phonon matrix elements from density-functional perturbation theory, in a spirit similar to the Bethe-Salpeter ...
Sio, Weng Hong   +3 more
openaire   +4 more sources

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