Results 181 to 190 of about 633,054 (390)

Study on damage and failure characteristics of loaded gas‐bearing rock–coal–rock combination structures

open access: yesDeep Underground Science and Engineering, EarlyView.
The influence of gas on the instability and failure of rock–coal–rock combinations is considered. The damage characteristics of gas‐bearing rock–coal–rock combinations under different confining pressures, axial loading rates, and gas are revealed. A constitutive model for gas‐bearing rock–coal–rock damage considering gas is established.
Feng Du   +8 more
wiley   +1 more source

A Survey on Reinforcement Learning in Aviation Applications [PDF]

open access: yesEngineering applications of artificial intelligence, 2022
Pouria Razzaghi   +8 more
semanticscholar   +1 more source

Aviation security and terrorism: a review of the economic issues [PDF]

open access: yes
Following the terrorist attacks on September 11, 2001, the passage of the Aviation and Transportation Act mandated a substantial increase in resources devoted to aviation security. This paper summarizes the specific changes stemming from this legislation.
Cletus C. Coughlin   +2 more
core  

Hydrogen sulfide in underground hydrogen storage sites: Implication of thermochemical sulfate reduction

open access: yesDeep Underground Science and Engineering, EarlyView.
A one‐dimensional diffusion‐based mass transport model was built using PHREEQC to highlight the potential challenges posed by thermochemical sulfate reduction (TSR) in depleted gas fields. The results obtained indicated that the presence of iron minerals (pyrite and hematite) is crucial for H2S generation through TSR reactions.
Sadegh Ahmadpour, Raoof Gholami
wiley   +1 more source

Practice and Theory of Aviation.—IV [PDF]

open access: green, 1910
Grover Cleveland Loening
openalex   +1 more source

METEOROLOGY AND AVIATION [PDF]

open access: yesMonthly Weather Review, 1917
openaire   +3 more sources

The Sky is the Limit? The Determinants and Constraints of European Airports' Commercial Revenues [PDF]

open access: yes
This study investigates the determinants of commercial and retail airport revenues as well as revenues from real estate operations. Cross-sectional OLS, 2SLS and robust regression models of European airports identify a number of significant drivers of ...
Franz Fuerst, Sven Gross, Ulf Klose
core  

Effects of pulsed RF disturbances on aeronautical communication systems [PDF]

open access: yes, 2015
Air Traffic Control (ATC) and their responsible authorities have been always very sensitive to safety of the systems they are using to guarantee a fool-proof and environmentally safe operation of the facilities to provide guidance for the airplanes. This
De Vos, Jan   +3 more
core   +1 more source

Challenges and the Way to Improve Lithium‐Ion Battery Technology for Next‐Generation Energy Storage

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Challenges and prospects for lithium‐ion battery. As a forefront energy storage technology, lithium‐ion batteries (LIBs) have garnered immense attention across diverse applications, including electric vehicles, consumer electronics, and medical devices, owing to their exceptional energy density, minimal self‐discharge rate, high open circuit voltage ...
Ashaduzzaman Khan   +4 more
wiley   +1 more source

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