On Tue, 1 Nov 2016 15:25:28 -0400, Tony Harminc <[email protected]> wrote:
. > >Sure - I understand what's going on. It's just that, typically, one >can "see" the nature of the units involved in such a statement. Often >enough, when some politician or news reporter makes a statement like >"Ontario exported 2.5 GW of electricity last year", or "an electric >kettle uses about 1.5 kWh", the meaninglessness jumps right out >because the units make no sense in the context. > >And in the familiar case where the numerator is in a length unit (say, >m), and the denominator in a time unit (say, s), we have names for >each level: distance, speed, acceleration, jerk. > >In this case we have time/time/time, which just fails to jump out at >me. Maybe my imagination, visual or otherwise, is lacking. > . The unit is 1/sec, or Hz. The value is ~ 5.134753814886006906326E-18. . > >Not any computer systems I work with. They use either 1900 or 1970 as >their epoch. What uses 1972? > . If you use leap seconds, then you should see the figure 26 on some HMC STP panel on your z machine, if your epoch is 1972. If you see 36, then your epoch is 1957. I know of no other epoch. Look at page 83 (not the 83rd page but where page footing reads 83) on the below publication: http://www.redbooks.ibm.com/redbooks/pdfs/sg247281.pdf In figure 3-5 there, you can see that leap second count or offset is 25. The manual was printed June 2013 when the count relative to 1972 was 25. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
