Hi there!

Now hear this....

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Re: Hi there!

Postby Big Black Shed » Tue Feb 09, 2010 2:19 am

Never mind that:

The wave propagation speed in meter per second is the speed at which a wavefront (e.g. an acoustic signal or en electro-magnetic signal such as a radio wavefront, a light pulse in a fibre channel or a change of the electrical voltage on a copper wire) passes through a medium. The propagation speed for transmission in a vacuum, for example wireless communication, is the speed of light, meaning that the VoP of 1 (100%). In electrical cables, the speed mainly depends on the isolating material.

So, now you know. ;) ;) :roll:
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Re: Hi there!

Postby Geetar » Tue Feb 09, 2010 7:59 am

Big Black Shed wrote: In electrical cables, the speed mainly depends on the isolating material.


In my experience, specifying different isolation and jacketing material at manufacture seems to have small but identifiable spectral effects; and to some degree I believe that the transmission of the envelope, or "timing" of any set of complex waveforms - rather than just pure frequency and amplitude information-may vary minutely with frequency. And I haven't seen this modelled reliably yet. Thoughts, anyone?




Ah, another day. Hi, Sned. Is the kettle on?
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Re: Hi there!

Postby RacingHippo » Tue Feb 09, 2010 9:52 am

Geetar wrote:... I haven't seen this modelled reliably yet. Thoughts, anyone?

I'll get Pygmy Hippo to have a go. He's got LOTS of Lego to build models with.
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Re: Hi there!

Postby Geetar » Tue Feb 09, 2010 3:08 pm

What's he like at economic models? I find the little red bricks very useful for representing changes in public sector payroll year-on-year.

Gives a good idea of the size of the bloodbath to come...
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Re: Hi there!

Postby Drarok » Sat Feb 20, 2010 3:49 pm

Pedro wrote:There's an excellent repository of bits and bobs from Jem and other Frost*ies stored away by the excellent Drarok at http://www.drarok.com/files/

No there isn't! I started working on a site at http://frost.drarok.com/ for people to contribute stuff to, but the stuff at the address you gave is just where I dump anything and everything, there happened to be some Frost* stuff in there, I have no doubt.

Perhaps you meant http://www.drarok.com/frost/ which is where I duplicated a load of stuff. :)
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Re: Hi there!

Postby Pedro » Sat Feb 20, 2010 4:02 pm

D'Oh, my bad.
Thanks for doing it though, it's been great to wander back through some stuff. :D
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Re: Hi there!

Postby Drarok » Sat Feb 20, 2010 5:17 pm

I keep meaning to tidy it up a bit, add a few files that aren't on there, but I get distracted so easily... :9
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