Results 261 to 270 of about 1,220,175 (393)

Computation of Engine Noise Propagation and Scattering off an Aircraft [PDF]

open access: green, 2003
Jinquan Xu   +3 more
openalex   +1 more source

Anticlastic Curvature and Material Freedom

open access: yesphysica status solidi (b), EarlyView.
Anticlastic curvature occurs in bent bars for positive Poisson's ratio; synclastic curvature occurs for negative Poisson's ratio provided the material is homogeneous and elastic. Some planar negative Poisson's ratio materials exhibit anticlastic saddle curvature rather than convex curvature in bending due to effects of 3D structure.
Roderic Lakes
wiley   +1 more source

Unique Microphysical Structures of Ultrafine Particles Emitted from Turbofan Jet Engines. [PDF]

open access: yesACS EST Air
Fushimi A   +9 more
europepmc   +1 more source

Rapid versus slow intensification of idealized tropical cyclones using soundings from reanalysis

open access: yesQuarterly Journal of the Royal Meteorological Society, EarlyView.
Climatologically averaged environmental wind and moisture around intensifying tropical cyclones are used in an idealized model to further discriminate differences between ensembles of rapidly (RI) and slowly (SI) intensifying storms. On average, RI storms have lower vertical tilt, are more axisymmetric, and less ventilated at onset than SI storms, and ...
Samantha Nebylitsa   +3 more
wiley   +1 more source

Evaluation of video evidence of possible ball lightning

open access: yesQuarterly Journal of the Royal Meteorological Society, EarlyView.
We analyze images of possible ball lightning that appeared less than 10 m from a video camera. The objects' velocity and estimated brightness all agree with typical eyewitness accounts of ball lightning. Though there is an alternative explanation that the objects were sparks from a power‐line arc, we describe analytical techniques that assist in ...
K. Stephan, R. Sonnenfeld, J. Bertoloni
wiley   +1 more source

An overview of drifting‐buoy deployments in atmospheric river reconnaissance from 2019 to 2024

open access: yesQuarterly Journal of the Royal Meteorological Society, EarlyView.
This article provides an overview of the drifting‐buoy deployments from 2019 to 2024 in the Atmospheric River Reconnaissance (AR Recon) observational campaign. The 309 buoys deployed have increased sea‐level atmospheric pressure coverage across the North Pacific and most buoys' pressure observations reduced forecast error in terms of the Forecast ...
David A. Lavers   +4 more
wiley   +1 more source

Gap Measurements in Aerospace Engineering. [PDF]

open access: yesSensors (Basel)
Zhao X   +6 more
europepmc   +1 more source

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