Results 181 to 190 of about 306,809 (340)

50 Years of Giese Reaction – a Personal View

Angewandte Chemie International Edition, EarlyView.
The Giese‐Reaction celebrates its 50. Birthday, it is a cyclic radical chain reaction centered around C,C‐bond formation in a three component synthesis. This minireview speaks about the birth of the name‐reaction, explains how the complete understanding of its reaction mechanism stimulates new methods in organic synthesis, and why it can proceed in ...
Martin Spichty, Hendrik Zipse, Salem Majouri, Katharina M. Fromm, Bernd Giese   +4 more
wiley   +1 more source

Transient ice ring observed during the 15 January 2022 eruption of Hunga volcano. [PDF]

Commun Earth Environ
Prata AT, Grainger RG, Taylor IA, Lambert A.   +3 more
europepmc   +1 more source

Development of a Broadband and Squint-Free Ku-Band Phased Array Antenna System for Airborne Satellite Communications

, 2011
David Marpaung, Chris Roeloffzen, Willem P. Beeker, Bertrand Noharet, J. Verpoorte, Rens Bagge   +5 more
openalex   +2 more sources

US development and commercialization of a North American mobile satellite service [PDF]

U.S. policies promoting applications and commercialization of space technology for the 'benefit of mankind,' and emphasis on international competitiveness, formed the basis of NASA's Mobile Satellite (MSAT) R&D and user experiments program to develop a ...
Arnold, Ray J., Freibaum, Jerry, Gray, Valerie   +2 more
core   +1 more source

Synergistic Effects of Co‐Activation Agents on an MnO–Activated Carbon Composite Electrode for Electrochemical Supercapacitors

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Carbon materials synthesized from biomass are promising candidates for supercapacitor electrodes. Various activation processes for developing carbon materials with high surface areas have been investigated. Here, a manganese monoxide (MnO)–porous‐activated carbon (AC) composite was fabricated via the chemical activation of coconut shell by the
Seung‐Heon Ryu, Changmin Kim, Jeeyoung Shin, Young‐Wan Ju   +3 more
wiley   +1 more source

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

International 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

Vegetation cover change as a growing driver of global leaf area index dynamics. [PDF]

Nat Commun
Wang D, Ziegler AD, Holden J, Spracklen DV, Ciais P, Peng L, Zeng Z.   +6 more
europepmc   +1 more source

AMPA experimental communications systems [PDF]

The program was conducted to demonstrate the satellite communication advantages of Adaptive Phased Array Technology. A laboratory based experiment was designed and implemented to demonstrate a low earth orbit satellite communications system.
Beckerman, D., Fass, S., Keon, T., Sielman, P.   +3 more
core   +1 more source

DFT‐Based Insights Into Elastic, Thermophysical, Electronic, and Optical Properties of Topological Insulators XTe5 (X = Zr, Hf)

Advanced Physics Research, EarlyView.
In this work, we present the first in‐depth investigation of elasto‐mechanical, thermophysical, and optical properties of these compounds. In particular, we analyzed the directional dependence of the elastic properties, explored the optical response for different photon polarization directions, and examined potential industrial applications of these ...
Syed Shovon Mahbub Mahin, Suptajoy Barua, B. Rahman Rano, Ishtiaque M. Syed, S. H. Naqib   +4 more
wiley   +1 more source

Evaluation of multi‐user multiple‐input multiple‐output digital beamforming algorithms in B5G/6G low Earth orbit satellite systems

International Journal of Satellite Communications and Networking, EarlyView., 2023
In this paper, we investigate the application of signal‐to‐leakage‐plus‐noise ratio (SLNR) beamforming to low Earth orbit non‐terrestrial networks. The SLNR criterion aims at maximizing the received desired signal power for each user while minimizing the overall interference power caused by each user to all other co‐channel receivers. We show that such
M. Rabih Dakkak, Daniel Gaetano Riviello, Alessandro Guidotti, Alessandro Vanelli‐Coralli   +3 more
wiley   +1 more source