Chromatic periodic activity down to 120 megahertz in a fast radio burst.
Sign Up to like & getrecommendations! Published in 2021 at "Nature"
DOI: 10.1038/s41586-021-03724-8
Abstract: Fast radio bursts (FRBs) are extragalactic astrophysical transients1 whose brightness requires emitters that are highly energetic yet compact enough to produce the short, millisecond-duration bursts. FRBs have thus far been detected at frequencies from 8 gigahertz… read more here.
Keywords: radio; frequency; 120 megahertz; megahertz ... See more keywords
Broadband Three-Dimensional Focusing for an Ultrasound Scalpel at Megahertz Frequencies
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review Applied"
DOI: 10.1103/physrevapplied.16.024006
Abstract: Ultrasound focusing, with strong penetrability and superior biocompatibility, has attracted substantial interest in biomedical science. Conventional focusing techniques generally rely on an active transducer array or curved lens, and acoustic metamaterials have recently emerged as… read more here.
Keywords: three dimensional; megahertz; megahertz frequencies; scalpel megahertz ... See more keywords