Results 241 to 250 of about 179,532 (301)
Simulation of Water Vapor Transport to the Stratosphere by Overshooting Convection
Journal of Geophysical Research: Atmospheres, Volume 131, Issue 6, 28 March 2026.Abstract Deep convection that penetrates the tropopause (overshooting convection) transports water vapor and other tropospheric constituents to the upper troposphere and lower stratosphere (UTLS). Overshooting convection has chemical and radiative impacts on the UTLS, including the downward transport of ozone and hydration of the stratosphere ...
Daniel R. Jellis +3 more
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The Source Brightness Distribution of Terrestrial Gamma‐Ray Flashes From the ALOFT Flight Campaign
Journal of Geophysical Research: Atmospheres, Volume 131, Issue 6, 28 March 2026.Abstract Terrestrial Gamma‐ray Flashes (TGFs) are naturally occurring phenomena that consist of bursts of gamma radiation associated with thunderclouds. Measurements of TGFs have been predominantly based on satellite instruments due to the significantly larger observation area compared to ground measurements. Due to atmospheric attenuation of the gamma
A. N. Fuglestad +15 more
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International Journal of Robust and Nonlinear Control, Volume 36, Issue 5, Page 3047-3067, 25 March 2026.ABSTRACT This paper presents a robust control synthesis and analysis framework for nonlinear systems with uncertain initial conditions. First, a deep learning‐based lifting approach is proposed to approximate nonlinear dynamical systems with linear parameter‐varying (LPV) state‐space models in higher‐dimensional spaces while simultaneously ...
Sourav Sinha, Mazen Farhood
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Technical documentary report. SAM-TDR. USAF School of Aerospace Medicine, 1998
A questionnaire distributed to two groups, one living within the flight pattern of a major airport and the other in a nonflight area, sought to determine whether these groups would respond differently to questions pertaining to noise, health perception, and quality of life issues. Nearly 70% of the residents living within the flight corridors reported
Arline L. Bronzaft +4 more
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A questionnaire distributed to two groups, one living within the flight pattern of a major airport and the other in a nonflight area, sought to determine whether these groups would respond differently to questions pertaining to noise, health perception, and quality of life issues. Nearly 70% of the residents living within the flight corridors reported
Arline L. Bronzaft +4 more
openaire +3 more sources
9th Propulsion Conference, 1973
Opportunities to reduce military aircraft noise without inhibiting mission capability are considered. Emphasis is placed on the need for a comprehensive military aircraft noise abatement program involving compatible land use in the vicinity of military airports, operational constraints, and procedures to reduce noise impact and source noise reduction ...
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Opportunities to reduce military aircraft noise without inhibiting mission capability are considered. Emphasis is placed on the need for a comprehensive military aircraft noise abatement program involving compatible land use in the vicinity of military airports, operational constraints, and procedures to reduce noise impact and source noise reduction ...
openaire +1 more source
Aircraft noise immission modeling
CEAS Aeronautical Journal, 2019This contribution to the CEAS special edition Aircraft Noise Generation and Assessment focuses on the simulation of the aircraft noise immission, i.e., the aircraft noise received on the ground. This process includes two steps, the description of the sound emission by the aircraft and the modeling of the sound propagation through the atmosphere.
Isermann, Ullrich, Bertsch, Lothar
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AIRCRAFT APPROACH NOISE TRIALS
Inter-Noise 2022, 2023This article presents the results from a series of aircraft approach trials that were conducted with the aim to investigate noise reduction procedures within the boundaries of a normal ILS approach. The significant decline in air traffic at Stockholm Arlanda, that occurred during the pandemic meant that the empty airspace and the availability of ...
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Airframe Noise-The Next Aircraft Noise Barrier
Journal of Aircraft, 1974Progress in quieting the commercial aviation fleet has been achieved by reducing the noise generated by jet engines. Recent tests have indicated that noise produced by airflow over aircraft surfaces (lifting surfaces, landing gear, flaps, and cavities) is only 8 to 10 EPNdB below certification requirements for current aircraft and will likely be a ...
H. MORGAN, J. HARDIN
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Noise & Vibration Worldwide, 2003
Various noise measurement parameters/indices used to define aircraft and airport noise are explained. The noise zone limits used around airports in some countries are given. Noise prediction software can be used to generate noise contours around airports.
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Various noise measurement parameters/indices used to define aircraft and airport noise are explained. The noise zone limits used around airports in some countries are given. Noise prediction software can be used to generate noise contours around airports.
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Scaling aircraft noise perception
Journal of Sound and Vibration, 1971An experiment was undertaken to evaluate various methods for calculating the perceived level of aircraft flyover sound. One hundred and twenty recorded sounds of jets, turboprops, piston engined aircraft, and helicopters were compared in a paired comparison test.
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