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http://aturingmachine.com/index.php
Too much time on his hands? Deeply awesome? Both? You decide!
I hope this guy works for a computer museum.
--
Darren New, San Diego CA, USA (PST)
Yes, we're traveling togeher,
but to different destinations.
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Darren New wrote:
> Too much time on his hands? Deeply awesome? Both? You decide!
Too much time? That's affirm!! O_O
Deeply awesome? Not really, no. It operates far, far too slowly to watch
it do anything useful. It's not clear which symbol is currently "under"
the R/W head. It's completely opaque why it writes the symbol it does. I
could continue.
Technically it produces the same result as a [finite] Turing machine,
and it's far nicer than anything I could ever build. That doesn't make
it awesome though.
> I hope this guy works for a computer museum.
If he doesn't, he should...
--
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*
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Orchid XP v8 wrote:
> Deeply awesome? Not really, no.
I thought it was awesome that it actually reads the tape with a camera
instead of cheating and storing anything in actual memory, for one.
> It operates far, far too slowly to watch it do anything useful.
I think "TM" and "useful" aren't really intended to go together.
> It's completely opaque why it writes the symbol it does.
I think the LCD display he isn't showing you in the videos covers that.
He also seems to be confused when he says it can compute anything
computable. A Turing machine is a definition of computability, not a result.
There are clearly all kinds of things a TM can't compute, and certainly
things a one-tape TM can't compute. We disregard those sorts of things
*because* Turing defined computability in terms of TMs.
It's like saying passing the Turing test proves you're intelligent. No, the
Turing test is a definition of intelligence, and if you don't accept that
definition, the test itself is meaningless. You find that 90% of the
arguments about things like the Chinese Room are simply arguments that the
Turing test isn't a good definition.
--
Darren New, San Diego CA, USA (PST)
Yes, we're traveling togeher,
but to different destinations.
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>> Deeply awesome? Not really, no.
>
> I thought it was awesome that it actually reads the tape with a camera
> instead of cheating and storing anything in actual memory, for one.
Well, if that's the case it's fairly awesome, but since you can't tell
that by looking at it...
>> It operates far, far too slowly to watch it do anything useful.
>
> I think "TM" and "useful" aren't really intended to go together.
OK, how about "interesting" then?
...actually, perhaps not.
>> It's completely opaque why it writes the symbol it does.
>
> I think the LCD display he isn't showing you in the videos covers that.
I'd prefer something more obviously visual, but may.
If there's one thing that *is* cool, it's that the eraser thingy
actually works...
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"Orchid XP v8" <voi### [at] dev null> wrote in message
news:4baf85b0$1@news.povray.org...
> Deeply awesome? Not really, no. It operates far, far too slowly to watch
> it do anything useful.
Well, it is an "actual" Turing machine, what do you expect?
> It's not clear which symbol is currently "under" the R/W head.
Fair critique. It would have been better to mount the scan head at the same
place on tape as the pen, maybe at an angle, or even from the bottom.
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>> Deeply awesome? Not really, no. It operates far, far too slowly to watch
>> it do anything useful.
>
> Well, it is an "actual" Turing machine, what do you expect?
It's cool that it uses a pen to actually write numbers, but it instead
it could just *stamp* them on there, typewriter style, it would be a lot
faster. (And it wouldn't be moving the tape around, so it would be
clearer which square is the current square.)
>> It's not clear which symbol is currently "under" the R/W head.
>
> Fair critique. It would have been better to mount the scan head at the same
> place on tape as the pen, maybe at an angle, or even from the bottom.
Not to mention the erase head.
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Invisible wrote:
> Well, if that's the case it's fairly awesome, but since you can't tell
> that by looking at it...
I guess you didn't actually watch him describe the machine's workings.
--
Darren New, San Diego CA, USA (PST)
Yes, we're traveling together,
but to different destinations.
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