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  2. Permissible exposure limit - Wikipedia

    en.wikipedia.org/wiki/Permissible_exposure_limit

    PELs for chemicals are measured in mg/M 3 (milligrams per cubic meter). [2] Mg/M 3 is used to measure pollutant’s mass in the air. [13] PELs compliance is monitored through direct reading measurement tools, various sampling methods, and measuring biological markers in workers.

  3. Recommended exposure limit - Wikipedia

    en.wikipedia.org/wiki/Recommended_exposure_limit

    This TWA is calculated for a standard workday of up to 10 hours, over a 40-hour workweek. This is slightly different to permissible exposure limit (PELs), which are calculated for 8 hours over a 40-hour workweek instead. [1] NIOSH recognizes that certain scenarios demand more immediate attention and has therefore introduced additional measures.

  4. Dilution ratio - Wikipedia

    en.wikipedia.org/wiki/Dilution_ratio

    The following formulas can be used to calculate the volumes of solute (V solute) and solvent (V solvent) to be used: [1] = = where V total is the desired total volume, and F is the desired dilution factor number (the number in the position of F if expressed as "1/F dilution factor" or "xF dilution"). However, some solutions and mixtures take up ...

  5. Respirator assigned protection factors - Wikipedia

    en.wikipedia.org/wiki/Respirator_Assigned...

    Example of measurement of efficiency of the respirator (in the workplace). Description: (1) personal sampling pump, (2) the cassette and the filter for determining the concentration (in the breathing zone), (3) the sampling line (from the breathing zone), (4) the cassette and the filter to determine the concentration (under a mask), and (5) the sampling line (from the mask).

  6. Valuation using multiples - Wikipedia

    en.wikipedia.org/wiki/Valuation_using_multiples

    A valuation multiple [1] is simply an expression of market value of an asset relative to a key statistic that is assumed to relate to that value. To be useful, that statistic – whether earnings, cash flow or some other measure – must bear a logical relationship to the market value observed; to be seen, in fact, as the driver of that market value.

  7. Rate ratio - Wikipedia

    en.wikipedia.org/wiki/Rate_ratio

    In epidemiology, a rate ratio, sometimes called an incidence density ratio or incidence rate ratio, is a relative difference measure used to compare the incidence rates of events occurring at any given point in time. It is defined as:

  8. Cyclically adjusted price-to-earnings ratio - Wikipedia

    en.wikipedia.org/wiki/Cyclically_adjusted_price...

    The cyclically adjusted price-to-earnings ratio, commonly known as CAPE, [1] Shiller P/E, or P/E 10 ratio, [2] is a stock valuation measure usually applied to the US S&P 500 equity market. It is defined as price divided by the average of ten years of earnings ( moving average ), adjusted for inflation. [ 3 ]

  9. Partial least squares path modeling - Wikipedia

    en.wikipedia.org/wiki/Partial_least_squares_path...

    PLS-PM [4] [5] is a component-based estimation approach that differs from the covariance-based structural equation modeling.Unlike covariance-based approaches to structural equation modeling, PLS-PM does not fit a common factor model to the data, it rather fits a composite model.

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