Abstract: Angle log-periodic meander line microstrip radial sheet beam traveling-wave tube is one kind of novel minimized vacuum device with low beam voltage. To generate and focus the radial sheet ...

To examine that possibility, Bovell-Ammon's team analyzed data from the National Longitudinal Survey of Youth, a study run by the U.S. Bureau of Labor Statistics (BLS) since 1979. The BLS study ...

Methods We undertook a single-centre retrospective observational cohort study. We randomly selected 4000 adults who attended a tertiary hospital ED in England from 1 January 2022 to 31 December 2022 ...