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 ...
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