Cool and accurate: An NPL researcher standing over one of their cryogenic current comparators. (Courtesy: NPL) Researchers in the UK have produced the most accurate cryogenic current comparator – a ...

Journal of Epidemiology and Community Health (1979-), Vol. 72, No. 7 (July 2018), pp. 559-563 (5 pages) Comparative population health studies are becoming more common and are advancing solutions to ...

Four different class measures (social groups, a socioeconomic classification, a measure by Erik Olin Wright, and a structural class concept) were applied on a gross material of 3 252 persons ...

Robert O'Neill does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...