Rheumatoid factor (RF) levels above a normal range can indicate autoimmune conditions, such as rheumatoid arthritis (RA). Rheumatoid factor (RF) is an immune system protein that attacks healthy cells.

Test your knowledge of F1 circuit layouts by correctly identifying each of the 2025 tracks solely based on a diagram of the circuit. While we can all remember the names and countries of the F1 ...

We were well prepared for this outage. We have a pair of identical 70 kW diesel generators at the site. Their fuel tanks were close to full, and we knew the generator was in good working order because ...

Wireless speakers and online streaming may be all the rage, but the humble radio is still a firm fixture in many homes. In fact, DAB radios are ever-popular, with new models now boasting extra ...

Do you use a Canon EOS R mirrorless camera? From wide-angle to telephoto, these are the best lenses we've tested for the platform. Images, and the devices that capture them, are my focus. I've ...

To test the effectiveness of the sub-band division, a sweep signal of 320–576 MHz is generated by the signal generator, with a step of 32 MHz, to obtain single-frequency signals of 320, 352, 384, 416, ...

The course covers design aspects of RF IC circuits and systems. Fundamental RF circuit theory (matching, noise and distortion) and design and analysis of CMOS RF circuits like filters (passive), ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Kathryn Rath and Nena Farrell What makes a great tabletop radio? Sure ...

Find out how we test. You certainly can’t accuse Canon of having a meagre line-up of wide-angle zoom lenses for its EOS R system mirrorless cameras. With the advent of this RF 16-28mm, there are no ...

First tokamak plasma at the SMall Aspect Ratio Tokamak – SMART – recorded with a fast-framing camera in the visible spectral range. Credit: Universidad de Sevilla The University of Seville’s SMART ...

Ferrari is to stage a second TPC test with the SF-23 at the Circuit de Barcelona-Catalunya, the home of F1’s Spanish Grand Prix, between January 28-30. Hamilton and Leclerc are expected to ...