flow

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flow

a measurement of quantity over a specified period of time. Unlike a STOCK, which is not a function of time, a flow measures quantity passing per minute, hour, day or whatever. A common analogy is to a reservoir. The water entering and leaving the reservoir is a flow but the water actually in the reservoir at any one point in time is a stock. INCOME is a flow but WEALTH is a stock.
References in periodicals archive ?
[5] Even in teenagers who have smoked only a few years, maximum expiratory flow volume curves demonstrate decreases in flow rates at small lung volumes [6] yet another expression of small airway obstruction.
Lung function parameters (Forced Vital capacity, FVC; Tidal volume, TV; Inspiratory vital capacity, IVC; Inspiratory reserve volume, IRV; Expiratory reserve volume, ERV; forced expiratory volume in first second, FEV1; Peak Expiratory flow rate, PEF; Maximum Expiratory Flow rate, MEF) were recorded on Spirometer.
The Peak Expiratory flow rate (7.60 [+ or -] 1.67 L/second), Maximum Expiratory Flow rate between 25-75% of vital capacity (MEF 25-75% , 4.54 [+ or -] 0.87 L/second), Maximum Expiratory Flow rate at 50% of vital capacity (MEF 50%, 5.26 [+ or -] 1.13 L/second), Maximum Expiratory Flow rate between 75-85% of vital capacity(MEF 75-85%, 7.10 [+ or -] 1.84 L/second) and Maximum Expiratory Flow rate at 25% of vital capacity (MEF 25%, 2.46 L/second) were higher in control group than akhada pahalwan (PEF, 7.10 [+ or -] 1.59; MEF 25-75%, 4.30 [+ or -] 0.87; MEF 50%, 5.16 [+ or -] 1.17; MEF 75-85%, 6.37 [+ or -] 1.71 and MEF 25%, 2.30 [+ or -] 0.78), although difference was not statistically significant (p > 0.05, Table 2).

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