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uk.tech.digital-tv (Digital TV - General) (uk.tech.digital-tv) Discussion of all matters technical in origin related to the reception of digital television transmissions, be they via satellite, terrestrial or cable. Advertising is forbidden, with no exceptions.

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Old December 29th 17, 01:21 AM posted to uk.tech.digital-tv,uk.d-i-y
Bill Wright[_3_]
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On 29/12/2017 02:03, Java Jive wrote:

Someone with a First-class Honours in Mathematics & Computing, and
therefore, by implication, logic.¬* The statement was a provable error of
logic¬* -¬* since assuming its truth leads to an absurdity, it must be false.

Someone with a big head I reckon. Lots of knowledge and no sense.

Old December 29th 17, 08:18 AM posted to uk.tech.digital-tv,uk.d-i-y
Roger Hayter
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Java Jive wrote:

On 28/12/2017 15:49, Cursitor Doom wrote:

I don't need "studies" to tell me I'm freezing my nuts off more and more
with each passing year. I only need to look out the ****ing window.
Global warming = my arse.

You will always get short-term variations from year to year, it's the
long-term trend over many decades into centuries that matters. Besides,
it's winter at the moment, and winter is usually cold. Also, as you get
older, lack of circulation tends to make you feel the cold more.

Where I am we have had about eight very mild winters in a row, after of
couple of years of prolonged snow and ice about ten years ago.
Needless to say, I draw no particular conclusions from this.


Roger Hayter
Old December 29th 17, 12:45 PM posted to uk.tech.digital-tv,uk.d-i-y
Java Jive[_2_]
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On 29/12/2017 02:21, Bill Wright wrote:

Someone with a big head I reckon. Lots of knowledge and no sense.

So what are your scientific qualification then? If I'm big-headed, what
does that make you?! Big-arsed I guess, as you're always talking
through it.
Old December 29th 17, 12:56 PM posted to uk.tech.digital-tv,uk.d-i-y
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On 28/12/2017 18:08, Bill Wright wrote:
On 28/12/2017 16:24, Java Jive wrote:
On 28/12/2017 14:38, brightside S9 wrote:
On Thu, 28 Dec 2017 12:44:43 +0000, Java Jive

What do reckon to this then?

Interesting, but the emphasis on solar cycles is overdone, see below.
However, let's deal with the obvious *error* first ...

So it's Professor Simon Shepherd of Bradford University, Dr Helen Popova
of Lomonosov Moscow State University and Dr Sergei Zarkhov of Hull


The Sage of Loch Shin

Seconds out!

Its not clear what you are trying to say. The post seemed very
reasonable to me.
Old December 29th 17, 03:05 PM posted to uk.tech.digital-tv,uk.d-i-y
[email protected]
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Bill Wright wrote:
What are the parameters that set the speed of electromagnetic
transmission in a vacuum? I've googled everywhere but I can't find the
answer. It's easy enough to find the figure but WHY? Why not
29,979,245.8 metres per second or 2,997,924,580 metres per second?

The speed of electromagnetic waves (in vacuum) is set by the speed
built into the underlying spacetime metric, usually denote "c".

Many physicists, particularly theorists, happily (and without introducing
any ambiguity) set this to 1, because they are not tied to any traditional
set of unit conventions. However, back in a more practical environment,
we have to work with pre-existing units such as meters and seconds.

Those physicists who have particular expertise in measurements decided
that since it is easier to measure times accurately, that would be best
to first define the second, and then tweak the definition of the meter
slightly so that c in everyday SI units was exactly 299 792 458 m/s.

If you want, feel free to convert c into furlongs/fortnight, or whatever
other crazy units take your fancy. But our second and meter definitions
mean that c = 299 792 458 m/s.


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