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  2. h-index - Wikipedia

    en.wikipedia.org/wiki/H-index

    The h-index is an author-level metric that measures both the productivity and citation impact of the publications, initially used for an individual scientist or scholar. The h-index correlates with success indicators such as winning the Nobel Prize, being accepted for research fellowships and holding positions at top universities. [1]

  3. Herfindahl–Hirschman index - Wikipedia

    en.wikipedia.org/wiki/Herfindahl–Hirschman_index

    Alternatively, the index can be expressed per 10,000 "points". For example, an index of .25 is the same as 2,500 points. The major benefit of the Herfindahl index in relation to measures such as the concentration ratio is that the HHI gives more weight to larger firms. Other advantages of the HHI include its simple calculation method and the ...

  4. Author-level metrics - Wikipedia

    en.wikipedia.org/wiki/Author-level_metrics

    The o-index corresponds to the geometric mean of the h-index and the most cited paper of a researcher. [30] RA-index: The RA-index accommodates improving the sensitivity of the h-index on the number of highly cited papers and has many cited paper and uncited paper under the h-core. This improvement can enhance the measurement sensitivity of the ...

  5. H index - Wikipedia

    en.wikipedia.org/wiki/H_index

    H/h index may refer to: Herfindahl index, a measure of the quantity and competition of firms in an industry; h-index, a measure of scientific research impact

  6. Heat index - Wikipedia

    en.wikipedia.org/wiki/Heat_index

    The formula below approximates the heat index in degrees Fahrenheit, to within ±1.3 °F (0.7 °C). It is the result of a multivariate fit (temperature equal to or greater than 80 °F (27 °C) and relative humidity equal to or greater than 40%) to a model of the human body.

  7. Cohen's h - Wikipedia

    en.wikipedia.org/wiki/Cohen's_h

    Researchers have used Cohen's h as follows. Describe the differences in proportions using the rule of thumb criteria set out by Cohen. [1] Namely, h = 0.2 is a "small" difference, h = 0.5 is a "medium" difference, and h = 0.8 is a "large" difference. [2] [3] Only discuss differences that have h greater than some threshold value, such as 0.2. [4]

  8. Viscosity index - Wikipedia

    en.wikipedia.org/wiki/Viscosity_index

    The viscosity index (VI) is an arbitrary, unit-less measure of a fluid's change in viscosity relative to temperature change. It is mostly used to characterize the viscosity-temperature behavior of lubricating oils. The lower the VI, the more the viscosity is affected by changes in temperature.

  9. Index of a subgroup - Wikipedia

    en.wikipedia.org/wiki/Index_of_a_subgroup

    A subgroup H of finite index in a group G (finite or infinite) always contains a normal subgroup N (of G), also of finite index. In fact, if H has index n, then the index of N will be some divisor of n! and a multiple of n; indeed, N can be taken to be the kernel of the natural homomorphism from G to the permutation group of the left (or right ...