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Goodhart's law is an adage often stated as, "When a measure becomes a target, it ceases to be a good measure". [1] It is named after British economist Charles Goodhart , who is credited with expressing the core idea of the adage in a 1975 article on monetary policy in the United Kingdom: [ 2 ]
Now QR codes also serve a much different purpose: as a tool for scammers. In December 2023, the Federal Trade Commission warned of a new form of phishing. Appropriately coined quishing, the scam ...
While life expectancy is one measure, the HHS uses a composite health measure that estimates not only the average length of life but also the part of life expectancy that is expected to be "in good or better health, as well as free of activity limitations". Between 1997 and 2010, the number of expected high quality life years increased from 61. ...
The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...
Poverty threshold. Graph of global population living on under 1, 1.25 and 2 equivalent of 2005 US dollars daily (red) and as a proportion of world population (blue) based on 1981–2008 World Bank data [needs update] Poverty thresholds for 2013. The poverty threshold, poverty limit, poverty line, or breadline[ 1] is the minimum level of income ...
QR decomposition. In linear algebra, a QR decomposition, also known as a QR factorization or QU factorization, is a decomposition of a matrix A into a product A = QR of an orthonormal matrix Q and an upper triangular matrix R. QR decomposition is often used to solve the linear least squares (LLS) problem and is the basis for a particular ...
Harvard step test. The Harvard step test, in scientific literature sometimes referred to as the Brouha Test, is a type of cardiac stress test for detecting and diagnosing cardiovascular disease. It is also a good measurement of fitness and a person's ability to recover after a strenuous exercise by checking the recovery rate.
Sleeping different amounts each night could be linked to diabetes risk, research has shown. A new analysis of UK Biobank data shows increased variance in sleep duration is associated with an ...
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