Results 181 to 190 of about 1,220,175 (393)

Kevlar/Basalt and Kevlar/Glass Intra‐Ply Reinforced Hybrid Composites: Influence of Basket Weave Fabric Structure on Thermal Properties, Flammability, and Impact Performance

open access: yesMacromolecular Materials and Engineering, EarlyView.
This research explores the effect of basket weave fabric structure and fiber combinations in hybrid composites, focusing on impact resistance, thermal stability, and flammability. The findings demonstrate that Kevlar‐glass laminates offer superior thermal stability and impact strength compared to Kevlar‐basalt laminates.
Mahdi Hosseini   +10 more
wiley   +1 more source

Control technology for future aircraft propulsion systems [PDF]

open access: yes
The need for a more sophisticated engine control system is discussed. The improvements in better thrust-to-weight ratios demand the manipulation of more control inputs. New technological solutions to the engine control problem are practiced.
Lehtinen, B.   +4 more
core   +1 more source

Dual cycle aircraft turbine engine [PDF]

open access: yes, 1977
A method and apparatus are presented for improving operating efficiency over broad ranges of flight conditions and for reducing jet engine noise output in takeoff and landing by controlling the airflow entering and exiting the engines.
Nichols, M. R.
core   +1 more source

Practical Applications of Secondary/Extractive Electrospray Ionization (SESI): A Versatile Tool for Real‐Time Chemical Analysis

open access: yesMass Spectrometry Reviews, EarlyView.
ABSTRACT In the 1980s, researchers discovered the remarkable ability of electrospray plumes to effectively ionize gas‐phase molecules via secondary ionization. Around 20 years later—coinciding with the ambient mass spectrometry revolution—secondary electrospray ionization (SESI) and extractive electrospray ionization (EESI) coupled to mass spectrometry
Xin Luo   +5 more
wiley   +1 more source

Contribution of non‐orthogonal multiple access signalling to practical multibeam satellite deployments

open access: yesInternational Journal of Satellite Communications and Networking, EarlyView., 2023
The potential gains of NOMA were evaluated in a satellite system with heterogeneous receivers, after considering the use of specific DVB‐S2X MODCODs, along with the impact of non‐linearities. It was concluded that a judicious power allocation in NOMA, jointly optimized with the IBO of the PAs, can yield significant sum‐rate gains.
Tomás Ramírez, Carlos Mosquera
wiley   +1 more source

Propulsion system study for Small Transport Aircraft Technology (STAT) [PDF]

open access: yes
Propulsion system technologies applicable to the generation of commuter airline aircraft expected to enter service in the 1990's are identified and evaluated in terms of their impact on aircraft operating economics and fuel consumption.
Hirschkron, R.   +2 more
core   +1 more source

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