"Xinhuan
Member

2922
 
Feb 5th 2014, 19:43:04
Tip: The DR contribution of a single attack is

0.5^(x/n)

where

x = Number of hours since the attack happened
n = The attack's half life in hours = 8*oversend factor

The attack's base half life is 8 on Express. This is multiplied by the Oversend Factor, which is usually at least 1.1 for successful attacks, at most 1.0 for failed attacks. No matter what though, n cannot go lower than 6 or higher than 12 for Express. If you like Excel or something, you can do the clamping of n to between 6 and 12 with one of the following:

=MEDIAN(6, 12, 8*oversend factor)
=MIN(MAX(8*oversend factor, 6), 12)


Now all the above are in hours, you can use minutes if you wish. x and n divide by each other and whatever time unit you want to use cancels out anyway."



Cheerio, Getafix

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