Partial Differential Equations!

[UnhealthyTruthseeker]

lol okay sorry what if I just talk about FT or FFT? That better?

So how would you improve our urine modeling by application of chaos theory? Is that for when you decide to go or in deciding how the "stream" moves to account for various unknowns?

Chaos theory comes into play in those weird instances when you're pissing as usual, and all of a sudden you notice that you're actually pissing two streams at once, and since you were aiming under the assumption of one, the piss goes everywhere and makes a mess.

[Genital Confusions]

I'm partial to differential equations.

[Genital Confusions]

lol okay sorry what if I just talk about FT or FFT? That better?

So how would you improve our urine modeling by application of chaos theory? Is that for when you decide to go or in deciding how the "stream" moves to account for various unknowns?

Chaos theory comes into play in those weird instances when you're pissing as usual, and all of a sudden you notice that you're actually pissing two streams at once, and since you were aiming under the assumption of one, the piss goes everywhere and makes a mess.

Chaos theory also comes into play when you jump off a tall building in order to kill yourself and live. Little do people know that the exact opposite also occurs. Dead people frequently try to reanimate themselves and end up staying dead.

[UnhealthyTruthseeker]

I just need to get around to getting the book again, if the need arises. The only things I really remember about my Differential Equations course was that a) It was about ODEs only, and b) It was too fucking easy.

And it was maybe a year and a half ago that I took it. I've been onto more fun math, like triple integrals and flux fields and turbulent flow friction calculations and energy head calculation and stuff.

If you want to figure out the total collection of all allowable velocity profiles that fall under various conditions (e.g. irrotational, incompressible, steady, compressible but steady, etc.), you will be using 2 PDE's, namely the conservation of mass for fluids (div(p*v) + dp/dt = 0)*, and the equation for rotation in fluids (1/2*curl(v) = w)**. If you also want to figure out what velocity field will actually exist in a particular setup, you must invoke the Navier-Stokes equation. There's some PDE's for you.

*those p's are actually rho's to represent mass density and v is the velocity vector field
**w is actually lower case omega and represents the angular velocity vector.

[UnhealthyTruthseeker]

Chaos theory also comes into play when you jump off a tall building in order to kill yourself and live. Little do people know that the exact opposite also occurs. Dead people frequently try to reanimate themselves and end up staying dead.

However, according to legend, they sometimes succeed in reanimation:

I'm not Christian, though.

[Genital Confusions]

Chaos theory also comes into play when you jump off a tall building in order to kill yourself and live. Little do people know that the exact opposite also occurs. Dead people frequently try to reanimate themselves and end up staying dead.

However, according to legend, they sometimes succeed in reanimation:

I'm not Christian, though.

A few weeks later, he decided to leave again but this time without dying. Apparently life wasn't worth sticking around for but dying kinda sucks too. I guess we're fucked.

[Unibot]

"pish: urine; also denoting that something is bad, e.g. "thats pure pish" - http://www.gla.ac.uk/clubs/ski/weegie.html#pish

You know, you could model a stream of urine using a few partial differential equations. Navier-Stokes and the equation of continuity for mass come to mind.

Also, why is math pure piss?

Hay that is a great point. Actually this is very important in the development of computer games. If the urine flow is not correctly modeled it could float all over the place and people would not play the game because they think it is to fake.

Want to try to come up with a simplistic model? What variables do you think are important enough to consider for an effective urine flow model?

edit: I need to get some pencil and paper out for this conversation

Pee Monkey Jungle Fire?

[UnhealthyTruthseeker]

*bump*

[Greed and Death]

What is there to discuss -_-

Would you rather discuss abortion for the 3.34 x 10²⁸th time?

yes.


Anyways, Abortion should remain legal.

[Faxanavia]

Let's discuss Partial Differential Equations!

Let's not!

[Anti-Social Darwinism]

What is there to discuss -_-

Would you rather discuss abortion for the 3.34 x 10²⁸th time?

Like being a good comedic, in order to make a good thread, your subject has to be universal. This subject is not universal.

Oh, but math is universal, especially calculus - it's universally hated. My response to Diffy Qs is, was, and always will be AAAARRRRRGGGGGHHHH! *runs for hills.*

[UnhealthyTruthseeker]

Oh, but math is universal, especially calculus - it's universally hated. My response to Diffy Qs is,
was, and always will be AAAARRRRRGGGGGHHHH! *runs for hills.*

Have you ever actually worked with differential equations?

[Greed and Death]

Oh, but math is universal, especially calculus - it's universally hated. My response to Diffy Qs is,
was, and always will be AAAARRRRRGGGGGHHHH! *runs for hills.*

Have you ever actually worked with differential equations?

I though you agreed to change this thread to abortion/health care/Obama?

[Risottia]

What is there to discuss -_-

Would you rather discuss abortion for the 3.34 x 10²⁸th time?

Like being a good comedic, in order to make a good thread, your subject has to be universal. This subject is not universal.

Like there's something more universal than physics.

Back to the OP, I'm still partial to good old Maxwell's equations. Expecially when you study the soliton solutions - which are non-linear (hyperbolic cosines galore).

[UnhealthyTruthseeker]

The heat equation is another nice equation, provided, of course, that the thermal diffusivity is constant.

So, we've got the parabolic heat equation, the elliptic Laplace and solenoidal equations, how about the hyperbolic wave equation?

The wave equation isn't bad either, as it is always separable. Yay!

[UnhealthyTruthseeker]

Like there's something more universal than physics.

Back to the OP, I'm still partial to good old Maxwell's equations. Expecially when you study the soliton solutions - which are non-linear (hyperbolic cosines galore).

What sort of setup will give you a soliton?

[Tunizcha]

< Is building a 3-D diagram of the "foam" described by quantum theory in vacuums required for Planck energy, along with parallel universe "bubbles" connected by wormholes.

[UnhealthyTruthseeker]

< Is building a 3-D diagram of the "foam" described by quantum theory in vacuums required for Planck energy, along with parallel universe "bubbles" connected by wormholes.

How are you doing this?

[New Kereptica]

< Is building a 3-D diagram of the "foam" described by quantum theory in vacuums required for Planck energy, along with parallel universe "bubbles" connected by wormholes.

How are you doing this?

Candy and toothpicks, like any good scientist.

[Tunizcha]

< Is building a 3-D diagram of the "foam" described by quantum theory in vacuums required for Planck energy, along with parallel universe "bubbles" connected by wormholes.

How are you doing this?

Candy and toothpicks, like any good scientist.

I would need probably over 10 thousand toothpicks for what I have in mind. It's a 3-D structure that I'm creating on the computer, which I will then translate into coded instructions for a machine at my uncle's factory designed to build complex 3-D sculptures. It'll probably be made out of some lightweight plastic polymer. Why am I doing this? I'm going to be participating in a science fair, which will hopefully land me in good graces with the physics community, which could lead to some scholarships. I'm thinking ahead here, folks.

[New Kereptica]

I would need probably over 10 thousand toothpicks for what I have in mind. It's a 3-D structure that I'm creating on the computer, which I will then translate into coded instructions for a machine at my uncle's factory designed to build complex 3-D sculptures. It'll probably be made out of some lightweight plastic polymer. Why am I doing this? I'm going to be participating in a science fair, which will hopefully land me in good graces with the physics community, which could lead to some scholarships. I'm thinking ahead here, folks.

When you get it done, would you mind posting pictures?

[Risottia]

The heat equation is another nice equation, provided, of course, that the thermal diffusivity is constant.

Don't you forget its sister equation: Schroedinger's equation!

[UnhealthyTruthseeker]

Don't you forget its sister equation: Schroedinger's equation!

Yeah, but Schroedinger's equation is not separable in every coordinate system. You are basically forced to use a certain coordinate system according to the symmetry of the potential. The only reason to change coordinates in the heat equation is to make the boundary value problem slightly easier.

[Risottia]

Like there's something more universal than physics.

Back to the OP, I'm still partial to good old Maxwell's equations. Expecially when you study the soliton solutions - which are non-linear (hyperbolic cosines galore).

What sort of setup will give you a soliton?

For a detalied description, I should re-read my notes... and I should be working right now instead.

Anyway: a soliton is basically a wavetrain without dispersion. The point is that the travelling field itself makes the dispersing components disappear without losing energy in the process (just like the evanescent wave leaving a waveguide).

[Tunizcha]

The heat equation is another nice equation, provided, of course, that the thermal diffusivity is constant.

Don't you forget its sister equation: Schroedinger's equation!

Which one of Schrodinger's equations? Wave equations?