wayfriend wrote:
So are you saying you don't see this illusory movement? If so, it would be very curious that you are somehow immune where others are not.
But if you only mean, I can tell it's not really moving, well ...
I don't know if it's "curious" our not...meaning I never asked anyone about it, maybe it's common...
But in many of those kinds of things, I can force my brain to stop seeing the motion. Some I can't, and the ones I can if I stop focusing there's a little mental jerk and I blink a lot for a bit and a really uncomfortable sensation.
[spoiler]Sig-man, Libtard, Stupid piece of shit. change your text color to brown. Mr. Reliable, bullshit-slinging liarFucker-user.[/spoiler] the difference between evidence and sources: whether they come from the horse's mouth or a horse's ass. "Most people are other people. Their thoughts are someone else's opinions, their lives a mimicry, their passions a quotation." the hyperbole is a beauty...for we are then allowed to say a little more than the truth...and language is more efficient when it goes beyond reality than when it stops short of it.
But in a strange way it does [more today than yesterday for some reason]. Perhaps like Hamlets madness it is dependant on the direction of the wind.
Wooaah Sorus!
President of Peace? You fucking idiots!
"I know what America is. America is a thing that you can move very easily. Move it in the right direction. They won't get in the way." (Benjamin Netenyahu 2001.)
....and the glory of the world becomes less than it was....
'Have we not served you well'
'Of course - you know you have.'
'Then let it end.'
Le Pétermane wrote:
Are helices and spirals related? Helices are cool too
Yes. A helix has to happen
in 3d [at least].
Indeed. There's actually no such thing as a spiral staircase.
Newsflash: the word "irony" doesn't mean "a bit like iron"
Shockingly, some people have claimed that I'm egocentric... but hey, enough about them
"If you strike me down, I shall become far stronger than you can possibly imagine." _______________________________________________ I occasionally post things here because I am invariably correct on all matters, a thing which is educational for others less fortunate.
I'm guessing a spiral staircase is actually a helix [the hand-rail] going around a central point [the central pole] and would have a 'wheel' appearence [complete with spokes] if viewed from above.
President of Peace? You fucking idiots!
"I know what America is. America is a thing that you can move very easily. Move it in the right direction. They won't get in the way." (Benjamin Netenyahu 2001.)
....and the glory of the world becomes less than it was....
'Have we not served you well'
'Of course - you know you have.'
'Then let it end.'
Le Pétermane wrote:I'm guessing a spiral staircase is actually a helix [the hand-rail] going around a central point [the central pole] and would have a 'wheel' appearence [complete with spokes] if viewed from above.
and you would be exactly right. [depending on treat spacing]
[spoiler]Sig-man, Libtard, Stupid piece of shit. change your text color to brown. Mr. Reliable, bullshit-slinging liarFucker-user.[/spoiler] the difference between evidence and sources: whether they come from the horse's mouth or a horse's ass. "Most people are other people. Their thoughts are someone else's opinions, their lives a mimicry, their passions a quotation." the hyperbole is a beauty...for we are then allowed to say a little more than the truth...and language is more efficient when it goes beyond reality than when it stops short of it.
Clearly from Hashi's earlier post, there is a lot of maths involved in this - but do spirals and helices have their own 'branch' of mathematics [as it were], or do their maths slot into [say] that of circles and spheres.
[I can imagine a sphere turning on it's axis, with a marker pen travelling at constant speed down the plane of the axis and tracing out a spiral on the sphere's surface as it goes {but, , it's not a spiral is it, because it's in 3D - there must be a name for that!}.]
President of Peace? You fucking idiots!
"I know what America is. America is a thing that you can move very easily. Move it in the right direction. They won't get in the way." (Benjamin Netenyahu 2001.)
....and the glory of the world becomes less than it was....
'Have we not served you well'
'Of course - you know you have.'
'Then let it end.'
Le Pétermane wrote:Clearly from Hashi's earlier post, there is a lot of maths involved in this - but do spirals and helices have their own 'branch' of mathematics [as it were], or do their maths slot into [say] that of circles and spheres.
[I can imagine a sphere turning on it's axis, with a marker pen travelling at constant speed down the plane of the axis and tracing out a spiral on the sphere's surface as it goes {but, , it's not a spiral is it, because it's in 3D - there must be a name for that!}.]
there is a lot of math in order to specifically deal with particular kinds of helix/spiral. [like...starting with your tracing example, there can be egg-shaped ones. And they will be different if the egg is horizontally laid, fat end on top, skinny end on top...chicken eggs or emu eggs or lizard eggs...whichever came first].
even in language/speech it is hard to define/delineate.
but a simple twirl of the finger will cross almost all boundaries in a general sense.
The thing you describe, if you'd read my previous, is a technically a helix. mapped onto 2dimensions, it is a spiral. There may well be an specific name for the specific pattern. [there is certainly a specific formula].
I think you're running into the problem between ordinary language and specific language.
The math is complicated...but the concept is easy. Again, the thing you describe is a spiral in ordinary language. In technical/math it is a helix. But the difference is in an additional spacial term.
A circle traced over and over is just a circle...but it BECOMES a helix by adding height.
the thing you describe is a spiral, with height added..therefore a helix [or a helix that becomes a spiral by subtracting height.] A square becomes a cube by adding height.
[spoiler]Sig-man, Libtard, Stupid piece of shit. change your text color to brown. Mr. Reliable, bullshit-slinging liarFucker-user.[/spoiler] the difference between evidence and sources: whether they come from the horse's mouth or a horse's ass. "Most people are other people. Their thoughts are someone else's opinions, their lives a mimicry, their passions a quotation." the hyperbole is a beauty...for we are then allowed to say a little more than the truth...and language is more efficient when it goes beyond reality than when it stops short of it.
Le Pétermane wrote:Clearly from Hashi's earlier post, there is a lot of maths involved in this - but do spirals and helices have their own 'branch' of mathematics [as it were], or do their maths slot into [say] that of circles and spheres.
Right they don't really have their own branch...
It's more like your second idea... math people study spirals and helices with the mathematical tools of some branch (say, differential geometry) ...and also use those same tools on circles, ellipses, or spheres, toruses, and such.
"People without hope not only don't write novels, but what is more to the point, they don't read them.
They don't take long looks at anything, because they lack the courage.
The way to despair is to refuse to have any kind of experience, and the novel, of course, is a way to have experience."
-Flannery O'Connor
"In spite of much that militates against quietness there are people who still read books. They are the people who keep me going."
-Elisabeth Elliot, Preface, "A Chance to Die: The Life and Legacy of Amy Carmichael"
Beautiful Linna. A spiral is one of the points where nature and art merge in together and become almost indistinguishable; this is perhaps the scource of their power to reach into us at a very deep level.
President of Peace? You fucking idiots!
"I know what America is. America is a thing that you can move very easily. Move it in the right direction. They won't get in the way." (Benjamin Netenyahu 2001.)
....and the glory of the world becomes less than it was....
'Have we not served you well'
'Of course - you know you have.'
'Then let it end.'
"It is not the literal past that rules us, save, possibly, in a biological sense. It is images of the past. Each new historical era mirrors itself in the picture and active mythology of its past or of a past borrowed from other cultures. It tests its sense of identity, of regress or new achievement against that past.”
-George Steiner
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This was meant to be a picture of 'spyrogyra' [ie the green algae you find in ponds; guess I ain't got my tecnique down yet!
President of Peace? You fucking idiots!
"I know what America is. America is a thing that you can move very easily. Move it in the right direction. They won't get in the way." (Benjamin Netenyahu 2001.)
....and the glory of the world becomes less than it was....
'Have we not served you well'
'Of course - you know you have.'
'Then let it end.'
Reposted from the Illusion thread, because I was really tired when I posted it last night...
Speaking of spiral staircases...I climbed this one yesterday at Montauk Point Lighthouse. Lorin declined.
That's only a portion of the stairway, of course. And once you've made your way up those babies, there's a final treat:
It's essentially a ladder. The docent at the top called the climb "the Montauk Stairmaster." He wasn't far off the mark....
EZ Board Survivor
"Dreaming isn't good for you unless you do the things it tells you to." -- Three Dog Night (via the GI)
It has that solid look of 'Victorian' [yes - wrong country but how else do I describe it ] engineering about it; that and the brickwork would have to put a date of......1870, 1880 on it?
President of Peace? You fucking idiots!
"I know what America is. America is a thing that you can move very easily. Move it in the right direction. They won't get in the way." (Benjamin Netenyahu 2001.)
....and the glory of the world becomes less than it was....
'Have we not served you well'
'Of course - you know you have.'
'Then let it end.'
, it's not a spiral is it, because it's in 3D - there must be a name for that!}.]
] engineering about it; that and the brickwork would have to put a date of......1870, 1880 on it?
