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The geometric standard deviation is used as a measure of log-normal dispersion analogously to the geometric mean. [3] As the log-transform of a log-normal distribution results in a normal distribution, we see that the geometric standard deviation is the exponentiated value of the standard deviation of the log-transformed values, i.e. = ( ()).
The Hausner ratio is a number that is correlated to the flowability of a powder or granular material.It is named after the engineer Henry H. Hausner (1900–1995). [1] [2]The Hausner ratio is calculated by the formula
The two-dimensional analogue of the vibrating string is the vibrating membrane, with the edges clamped to be motionless. The Helmholtz equation was solved for many basic shapes in the 19th century: the rectangular membrane by Siméon Denis Poisson in 1829, the equilateral triangle by Gabriel Lamé in 1852, and the circular membrane by Alfred Clebsch in 1862.
A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs.
Matthew 5 is the fifth chapter of the Gospel of Matthew in the New Testament. It contains the first portion of the Sermon on the Mount , the other portions of which are contained in chapters 6 and 7 .