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Once all photon events have been placed in the output image , each pixel in the output image that contains zero events has the ratio _ bkgd.fit / _ ff.fit subtracted from it to provide the remainder of the background subtraction . A machine with _ n _ CPUs can , intuitively enough , run no more than _ n _ threads in parallel , but it may give the appearance of running many more than _ n _ " simultaneously " , by sharing the CPUs among threads . That _ punishment _ of which men used to talk so wisely and act so foolishly , what was it but the expression of their fear ? Note that _ bkgd.fit / _ ff.fit is evaluated at the same pixel position as the output pixel , even though the output pixel coordinates are in the FARF and the _ bkgd.fit and _ ff.fit files have been transformed into raw coordinates . Stata 's " _ n " is equivalent to SAS 's " _ n _ " in that it is equal to the observation number ; but when inside a by command " _ n " is equal to 1 for the first observation of the by-group , 2 for the second observation of the by-group , etc. " Save To Disk " , then right-click the link and choose " Save Link Target As ... The directory should be named <login> _ backup . A merchant of the Severan heresy had an orthodox π ι σ τ ι κ _ ς who brought him communion for Good Friday in a pyx ( _ v μ o υ ζ ι κ ί _ ) which he placed in a cupboard ( _ v _ ρ μ α ρ ί _ ) and gave the key to the master ( τ _ α _ θ έ v τ _ .