Results 161 to 170 of about 179,421 (367)

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

Refan program. Phase 1: Summary report [PDF]

open access: yes
The Refan Program is aimed at a large reduction in aircraft approach and takeoff noise in the vicinity of airports caused by the JT3D-powered 707's and DC-8's and the JT8D-powered 727's, 737's and DC-9's.
Bresnahan, D. L., Sams, E. W.
core   +1 more source

Biomass‐Derived Hetero Atom‐Doped Porous Carbon for Enhanced CO2 Adsorption

open access: yesMetalMat, EarlyView.
This review discusses the synthesis and characterization of the heteroatom (N, S, P, O, B)‐doped porous carbon materials which are specifically designed for the CO2 capture and CO2 conversion to value‐added products. ABSTRACT The emission of carbon dioxide (CO2) and its impact on global warming have shown exponential growth in recent decades.
Aniruddha B. Patil   +2 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

Interior noise levels of two propeller-driven light aircraft [PDF]

open access: yes
The relationships between aircraft operating conditions and interior noise and the degree to which ground testing can be used in lieu of flight testing for performing interior noise research were studied.
Catherines, J. J., Mayes, W. H.
core   +1 more source

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