Re: [ontolog-forum] Looking for some pragmatic guidance on modeling rela

[John Bottoms <john@xxxxxxxxxxxxxxxxxxxx>]

There is also an issue about reconciling (or not) times when contexts cross or merge.
This may already be addressed in current context processing such as crossing the International Dateline and time zones.

For most of these issues there is a standard time such as GMT or sidereal. Those are with respect to the Earth. Maybe there is a need for a more cosmic time standard. We are a long way from that point, but there are issues associated with planetary exploration. Recently, the rotation rate of Venus was used as a reference, and it was recently discovered that it is changing quite rapidly. As a result, targeted landing spots are out of place by as much as 20 km.

National Geographic: Venus Spinning Slower Than Thought—Scientists Stumped

http://news.nationalgeographic.com/news/2012/02/120214-venus-planets-slower-spin-esa-space-science/

-John Bottoms

On 4/8/2015 8:14 PM, John F Sowa wrote:

On 4/8/2015 6:29 PM, Steve Ray wrote:

I didn't see anything specifically talking about different rates
of time passing

A clock can be any process that you believe is sufficiently
regular that it is can be adopted as a standard.  Galileo
used his heartbeat to time experiments.  That is sufficient
to establish a partial ordering.

If you want to relate the ticks of different clocks, then you need
to find or assume some ratio (or other function).

John

 
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