Search found 81 matches

by Brwagur
Mon Aug 24, 2009 12:04 am UTC
Forum: Science
Topic: Life expectancy of scientists
Replies: 32
Views: 5851

Re: Life expectancy of scientists

As far as insane mathematicians go, who can forget Georg Cantor? Poor man, he should never have played with infinity...
by Brwagur
Tue Aug 18, 2009 11:27 pm UTC
Forum: Mathematics
Topic: Sudoku algebra
Replies: 11
Views: 2098

Re: Sudoku algebra

by Brwagur
Sun Aug 16, 2009 1:42 am UTC
Forum: Science
Topic: iodine + methylene blue
Replies: 2
Views: 1465

Re: iodine + methylene blue

interesting, i figured it had something to do with methylene blue's aromaticity... i would be curious to find out if adding iodine directly to MB would produce the same effect. also, when it was heated, although the gold color was gone, there was still some kind of membrane between the oil/iodine so...
by Brwagur
Sun Aug 09, 2009 3:18 am UTC
Forum: Science
Topic: iodine + methylene blue
Replies: 2
Views: 1465

iodine + methylene blue

some time ago i was playing with potassium iodide and an aqueous solution of methylene blue. i dissolved elemental iodine in mineral oil by pouring mineral oil to a vial of KI, adding bleach (NaClO), and shaking until the mineral oil turned violet. when i poured the mineral oil/iodine solution into ...
by Brwagur
Sun Aug 09, 2009 3:03 am UTC
Forum: Science
Topic: Blue alchopop loses colour
Replies: 5
Views: 1547

Re: Blue alchopop loses colour

my guess would be that the blue pigment decomposes in exposure to sunlight.
by Brwagur
Fri Jul 17, 2009 12:35 am UTC
Forum: Science
Topic: What are these CG pictures from nasa?
Replies: 4
Views: 1226

Re: What are these CG pictures from nasa?

Geez, that's a lot of IFS!
by Brwagur
Fri Jul 17, 2009 12:11 am UTC
Forum: Science
Topic: Neutrino Mass
Replies: 10
Views: 1476

Re: Neutrino Mass

Yay redshift! or blueshift, depending on your political alignment. A greenshifted photon will probably never win a major election...
by Brwagur
Sun Jul 12, 2009 2:59 am UTC
Forum: Mathematics
Topic: Four Color Problem
Replies: 3
Views: 761

Re: Four Color Problem

it wasn't wikipedia that told me that, it was a book that i just bought. has a nice proof still not been found for the four color problem?
by Brwagur
Sun Jul 12, 2009 2:17 am UTC
Forum: Mathematics
Topic: Boundary Optimization
Replies: 16
Views: 1333

Re: Boundary Optimization

i don't have a solution either, but i assume you would want to trace a circle? that should be the minimum surface to enclose the maximum area.
by Brwagur
Sun Jul 12, 2009 2:10 am UTC
Forum: Science
Topic: Neutrino Mass
Replies: 10
Views: 1476

Re: Neutrino Mass

because the photons aren't changing from one type of photon to another. in fact a photon, as a particle, doesn't have a frequency; it has a particular energy which, in terms of waves, can best be described as a frequency. wave-particle duality can be confusing...
by Brwagur
Sun Jul 12, 2009 1:48 am UTC
Forum: Mathematics
Topic: Four Color Problem
Replies: 3
Views: 761

Four Color Problem

is it just a coincidence that the value of Heawood's formula (C=int[(7+sqrt(1+48h))] , where h is the order of a surface and C is the number of colors necessary) when h=0 is 4, even though the formula is intended only for h>0?
by Brwagur
Fri Jul 10, 2009 3:08 am UTC
Forum: Science
Topic: Insider Science Jokes/Lingo
Replies: 129
Views: 28824

Re: Insider Science Jokes/Lingo

I built HAMMERTIME in ballview and ran some quick energy minimizations. it seems to fold rather nicely :wink:
by Brwagur
Fri Jul 10, 2009 2:50 am UTC
Forum: Science
Topic: How do OLEDs work?
Replies: 13
Views: 1629

Re: How do OLEDs work?

The organic molecules must be conjugated polymers, mustn't they?
by Brwagur
Fri Jul 10, 2009 2:34 am UTC
Forum: Mathematics
Topic: Euler's Formula.
Replies: 4
Views: 1010

Re: Euler's Formula.

I'm a high school student as well and had the same questions. the answer is yes. sin(z)=-\frac{i\,\left( {e}^{i\,z}-{e}^{-i\,z}\right) }{2} cos(z)=\frac{{e}^{i\,z}+{e}^{-i\,z}}{2} solve tan(z)=\frac{sin(z)}{cos(z)} to get tan(z)=-\frac{i\,\left...
by Brwagur
Tue Jul 07, 2009 1:50 am UTC
Forum: Science
Topic: Force of a raindrop
Replies: 17
Views: 7627

Re: Force of a raindrop

i'm sorry, i just remembered reading in a book somewhere that raindrops flattened out considerably as they fell.
by Brwagur
Mon Jul 06, 2009 12:41 am UTC
Forum: Science
Topic: Force of a raindrop
Replies: 17
Views: 7627

Re: Force of a raindrop

but a falling raindrop is not a sphere: it flattened out considerably by air resistance so that it is actually more like a disk. isn't air resistance important for such a light object?
by Brwagur
Tue Jun 16, 2009 6:27 pm UTC
Forum: Science
Topic: Physics 101
Replies: 1
Views: 506

Physics 101

I am trying to prep a friend for his physics course this fall. what math should he be expected to know for a physics 101 course?
by Brwagur
Tue Jun 16, 2009 3:32 am UTC
Forum: Science
Topic: Fungal Parasites! (Help please?)
Replies: 28
Views: 2305

Re: Fungal Parasites! (Help please?)

just as far as dramatic effect is concerned, even though having the fruiting body burst forth from the eye sockets is more gruesome, would it not be more dramatic to have it emerge from the victim's spinal column, just like the ant in the picture? i can imagine a person lying on the ground, undergoi...
by Brwagur
Wed Jun 03, 2009 12:55 am UTC
Forum: Mathematics
Topic: Curve Question
Replies: 15
Views: 1315

Re: Curve Question

How do you iterate functions and stuff in maxima? i can't figure it out.
by Brwagur
Tue Jun 02, 2009 2:27 am UTC
Forum: Mathematics
Topic: Curve Question
Replies: 15
Views: 1315

Re: Curve Question

Right, but it explains why the graph tends to twist inwards after each iteration. It's mad-crazy stretching of the unit interval! :twisted:
by Brwagur
Tue Jun 02, 2009 2:20 am UTC
Forum: Mathematics
Topic: Curve Question
Replies: 15
Views: 1315

Re: Curve Question

Wait, shouldn't any positive, imaginary value send it shooting toward the origin? I see what you're saying though, I had thought of that, the thought just didn't connect fully :oops:
by Brwagur
Tue Jun 02, 2009 2:09 am UTC
Forum: Mathematics
Topic: Curve Question
Replies: 15
Views: 1315

Re: Curve Question

Ah... well, er, yes? Wait, no. Good point. I guess that means that one could do a complex mapping of the Mandelbrot sort of this function, though i don't know if the basin of convergence will be a fractal or not. Any easy way to find out?
by Brwagur
Tue Jun 02, 2009 1:50 am UTC
Forum: Mathematics
Topic: Curve Question
Replies: 15
Views: 1315

Re: Curve Question

crap, i guess there's no way for me to analyze this, then. Here are some of the iterations of that first function for [0,1) :
Spoiler:
F1.png
Unit Circle
F1.png (11.59 KiB) Viewed 1507 times

F2.png
First iteration. There isn't actually a cusp at the origin, there's a small loop.
F2.png (13.59 KiB) Viewed 1508 times

F3_1.png
The second iteration, close to the origin.
F3_1.png (16.11 KiB) Viewed 1509 times

F3_2.png
The second iteration, farther out. This is the best i can do, when i try to zoom fit my computer explodes.
F3_2.png (11.3 KiB) Viewed 1508 times
by Brwagur
Tue Jun 02, 2009 12:49 am UTC
Forum: Mathematics
Topic: Curve Question
Replies: 15
Views: 1315

Re: Curve Question

Is there any counterpart to the cobweb plot in the complex plane?
by Brwagur
Tue Jun 02, 2009 12:43 am UTC
Forum: Mathematics
Topic: Curve Question
Replies: 15
Views: 1315

Re: Curve Question

But x and x squared don't draw the same curve on the complex plane. I guess it isn't strange in the sense that the iterations of sin(x) differ in form from sin(2x), the latter is also more prone to becoming chaotic, if i recall correctly. To me, the strange thing is how much the iterations of {e}^{2...
by Brwagur
Tue Jun 02, 2009 12:26 am UTC
Forum: Mathematics
Topic: Curve Question
Replies: 15
Views: 1315

Re: Curve Question

I was wondering if iterating it would yield a fractal mapping, but since my free trial for ultrafractal has expired I'm not sure if I'll ever find out :cry: Strangely, the iterations of this curve are different than iterations of [imath]e^{i\ x}[/imath] over [imath][0,2\pi)[/imath]...
by Brwagur
Mon Jun 01, 2009 11:26 pm UTC
Forum: Mathematics
Topic: Curve Question
Replies: 15
Views: 1315

Curve Question

Given f(x) ={e}^{2\pi\,i\ x} over the interval [0,1), (the unit circle on the complex plane), what are the names for the curves (f \circ f)(x) and (f \circ f \circ f)(x) ? Is there any general name for curves of the family f^n (x) ? What happens as n \...
by Brwagur
Mon Jun 01, 2009 10:57 pm UTC
Forum: Science
Topic: Comical mistakes in your homework.
Replies: 144
Views: 17298

Re: Comical mistakes in your homework.

The errors resulting in negative solutions etc. remind me of the the paper "Endochronic Properties of Resublimated Thiotimoline" ;)
by Brwagur
Fri May 29, 2009 2:01 am UTC
Forum: Mathematics
Topic: Strange Attractor
Replies: 0
Views: 528

Strange Attractor

does the point [imath]({U}_{k},{V}_{k})[/imath] where [math]{U}_{n}={sin\left( \frac{n}{\pi}\right) }^{\frac{1}{3}}\,{cos\left( {U}_{n-1}\right) }^{\frac{1}{3}}+sin\left( n\right)[/math]
[math]{V}_{n}=sin\left( {V}_{n-1}\right) +cos\left( n\right)[/math]

lie on a strange attractor?
by Brwagur
Fri May 29, 2009 1:41 am UTC
Forum: Mathematics
Topic: Kleinian Groups
Replies: 4
Views: 668

Re: Kleinian Groups

was the projective plane in widespread use in the 1960's? If not, it's the ordinary complex plane.
by Brwagur
Wed May 27, 2009 3:03 am UTC
Forum: Science
Topic: Properties of Sentience
Replies: 28
Views: 3812

Re: Properties of Sentience

'twas cockatoo. But to be fair, having a non-sentient creature that does respond to music doesn't imply the converse - that a sentient creature can be non-responsive to music. That is very true, though i'll admit that it would require an auditorily based organism for it to come about at all. FYI, by...
by Brwagur
Wed May 27, 2009 2:59 am UTC
Forum: Books
Topic: special topics in calamity physics
Replies: 3
Views: 1324

special topics in calamity physics

Who's read it? I think it's fucking awesome.
by Brwagur
Wed May 27, 2009 2:57 am UTC
Forum: Music
Topic: Drummers in bands (suck)
Replies: 79
Views: 8446

Re: Drummers in bands (suck)

I happen to like Pink Floyd's drummer (i forget his name). A lot. Particularly when the drums come in at the beginning of Dark Side of the Moon ("Speak to Me") and after the intro to the first chunk of "Shine on You Crazy Diamond." I hope somebody out there knows what I'm talking...
by Brwagur
Wed May 27, 2009 2:49 am UTC
Forum: Books
Topic: Catcher in the Rye stinks or is it just me?
Replies: 70
Views: 13534

Re: Catcher in the Rye stinks or is it just me?

I found Holden psychologically interesting. He is obnoxious and stubborn but is in reality a fairly complex character. I can understand why someone could dislike it but there are worse books.
by Brwagur
Wed May 27, 2009 2:15 am UTC
Forum: Science
Topic: Properties of Sentience
Replies: 28
Views: 3812

Re: Properties of Sentience

Besides, there's that parrot that has learned to dance to the rhythm of music so obviously our pattern recognition isn't unique.
by Brwagur
Wed May 27, 2009 1:56 am UTC
Forum: Science
Topic: What is the hottest possible temperature?
Replies: 28
Views: 14179

Re: What is the hottest possible temperature?

what of the plank temperature?
by Brwagur
Wed May 27, 2009 1:55 am UTC
Forum: Science
Topic: Properties of Sentience
Replies: 28
Views: 3812

Re: Properties of Sentience

Then doesn't it stand to reason that some other organism would find it's neural (or whatever) circuits tickled in a similar way by some kind of stimulus?
by Brwagur
Tue May 26, 2009 8:11 pm UTC
Forum: Mathematics
Topic: Kleinian Groups
Replies: 4
Views: 668

Re: Kleinian Groups

I had already been to all of those sites and they just told me what i already knew: that it is a set of mobius transformations.
by Brwagur
Tue May 26, 2009 2:43 am UTC
Forum: Science
Topic: Most geeky thing you've done recently.
Replies: 133
Views: 50145

Re: Most geeky thing you've done recently.

sexy :wink:

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