Current Events > You're solving an equation and you want to use a Greek letter for a constant.

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Garioshi
02/25/20 8:00:12 PM
#1:


What letter are you using?

I'm going with , personally.

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AFrench2
02/25/20 8:01:28 PM
#2:


Sigma cuz of megaman

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TeaMilk
02/25/20 8:17:53 PM
#3:


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teepan95
02/26/20 12:43:41 AM
#4:


or

the least likely to have already been taken
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LordFarquad1312
02/26/20 12:48:05 AM
#5:


I wouldn't. I'd have to search which ones aren't already associated to something else, I'd rather just use a letter and a subindex if necesary like any decent person.

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Eevee-Trainer
02/26/20 1:46:19 AM
#6:


Depends on context. Usually I'll just go alphabetically, with a few exceptions

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PiOverlord
02/26/20 1:49:39 AM
#7:


Let me think about it.

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ThyCorndog
02/26/20 1:50:57 AM
#8:


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Wewillrocku
02/26/20 1:53:09 AM
#9:


none, they're all bad.

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Distant_Rainbow
02/26/20 2:17:47 AM
#10:


Either , or , or just go alphabetically, skipping those already used in the equation.

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Gobstoppers12
02/26/20 2:41:58 AM
#11:


I use the number seven (7)

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Garioshi
02/26/20 11:31:43 AM
#12:


teepan95 posted...
or

the least likely to have already been taken
because they're a fucking pain to write

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teepan95
02/26/20 12:06:51 PM
#13:


Garioshi posted...
teepan95 posted...
or

the least likely to have already been taken
because they're a fucking pain to write

Only for weaklings

You're not a weakling, are you?
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Jabodie
02/26/20 12:08:49 PM
#14:


alpha unless it's in the equation.

But sometimes I'll just use a square or something.

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Jabodie
02/26/20 12:09:21 PM
#15:


teepan95 posted...
or

the least likely to have already been taken
In my field these variable are used all the time lol

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teepan95
02/26/20 12:10:11 PM
#16:


Jabodie posted...
teepan95 posted...
or

the least likely to have already been taken
In my field these variable are used all the time lol

Which field?
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Questionmarktarius
02/26/20 12:26:40 PM
#17:


Be a rebel and use poop emoji instead
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NeonOctopus
02/26/20 12:27:25 PM
#18:


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Jabodie
02/26/20 12:28:22 PM
#19:


teepan95 posted...
Which field?
Structural engineering, particularly in the cases of finite element modeling and structural dynamics (earthquake response).

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Ranting Nord
02/26/20 12:37:21 PM
#20:


lmao

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closetjpopfan
02/26/20 1:01:06 PM
#21:


Qoppa.
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emblem boy
02/26/20 1:02:02 PM
#22:


Beta
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Questionmarktarius
02/26/20 1:03:01 PM
#23:


emblem boy posted...
Beta
Or, use both and , just to mess with everyone.
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teepan95
02/26/20 1:04:38 PM
#24:


Jabodie posted...
teepan95 posted...
Which field?
Structural engineering, particularly in the cases of finite element modeling and structural dynamics (earthquake response).

Interesting

What do they tend to represent?
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MarqueeSeries
02/26/20 1:10:22 PM
#25:


I always reserve , , and for angles

But if I was gonna go for a constant? Idk, , , , , , , and are already off the table. Probably just a tried and true x, and give it an assignment beforehand
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Jabodie
02/26/20 1:15:32 PM
#26:


teepan95 posted...
Interesting

What do they tend to represent?
In dynamic, represents a building damping ratio. Buildings have various components that aren't modeled as part of the structure, but dissipate some of the shaking energy. For convenience these are not modeled directly, but lumped together as damping ratio which generates forces proportional to velocity. If you have a technical background, you might be familiar with [ma(t) + cv(t) + ku(t) = p(t)]. We assume a damping ratio and generate a matrix of C coefficients.

In 2D Finite Element modeling, structural components are typically divided/meshed into quads or triangles in x,y,z dimensional space. The prototypical stiffness properties of a quad or triangle is in , , , and individual quad/triangle properties are essentially used to find the Jacobian to go from prototypical element space ( ) to actual space (x y z).

Edit: By "2D" modeling, I am referring to 2D elements in 3D space. There are 3D elements as well, but they are not used often in structural analysis.

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teepan95
02/26/20 1:26:23 PM
#27:


Jabodie posted...
teepan95 posted...
Interesting

What do they tend to represent?
In dynamic, represents a building damping ratio. Buildings have various components that aren't modeled as part of the structure, but dissipate some of the shaking energy. For convenience these are not modeled directly, but lumped together as damping ratio which generates forces proportional to velocity. If you have a technical background, you might be familiar with [ma(t) + cv(t) + ku(t) = p(t)]. We assume a damping ratio and generate a matrix of C coefficients.

In 2D Finite Element modeling, structural components are typically divided/meshed into quads or triangles in x,y,z dimensional space. The prototypical stiffness properties of a quad or triangle is in , , , and individual quad/triangle properties are essentially used to find the Jacobian to go from prototypical element space ( ) to actual space (x y z).


Oscillations, right? I taught the basics to undergrads last year, so I'm familiar with the equations

I'm not familiar with FEM, but I'm about to take an exam on Finite Volume modelling and it involves transforms from Cartesian space to curved ( ) space
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Machete
02/26/20 1:31:38 PM
#28:


Whichever one looks most like genitalia, male or female, doesn't matter.
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Garioshi
02/26/20 1:33:44 PM
#29:


Machete posted...
Whichever one looks most like genitalia, male or female, doesn't matter.
?

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Jabodie
02/26/20 1:34:41 PM
#30:


teepan95 posted...
Oscillations, right? I taught the basics to undergrads last year, so I'm familiar with the equations

I'm not familiar with FEM, but I'm about to take an exam on Finite Volume modelling and it involves transforms from Cartesian space to curved ( ) space
More or less, yeah. An earthquake ground motion can be viewed as a highly variable two way oscillator (N-W, E-W). An important fact is that the existence of a velocity based resistance mechanism (viscous damping) has no physical basis, and requires sort of ad hoc adjustments to get reasonable results.

And it sounds like you'll be doing similar stuff but more complicated finite element modeling wise.

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fohstick
02/26/20 1:36:23 PM
#31:


i never thought i'd see someone on CE explain FEM. That area of study is extremely hard
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Jeff AKA Snoopy
02/26/20 1:39:26 PM
#32:


Why would I wanna use a Greek letter?

I'll just use x like a pleb

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Jabodie
02/26/20 1:44:54 PM
#33:


fohstick posted...
i never thought i'd see someone on CE explain FEM. That area of study is extremely hard
Well, tbh I'm only lightly familiar with it. I took a course on it to inform my research, but I personally do not use softwares like ANSYS or LSDYNA. We never modeled anything more complicated than a tensile membrane for an assignment.

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teepan95
02/26/20 1:46:48 PM
#34:


Jabodie posted...
And it sounds like you'll be doing similar stuff but more complicated finite element modeling wise.

Nah, since we model fluids we tend to not go further than FD/FV
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I can calculate (within a reasonable margin of error) how this nut is gonna splash when it hits ya tiddies
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Jabodie
02/26/20 1:49:36 PM
#35:


teepan95 posted...
Nah, since we model fluids we tend to not go further than FD/FV
Finite element fluid dynamics is pretty complicated I thought <_<

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teepan95
02/26/20 1:51:36 PM
#36:


Jabodie posted...
teepan95 posted...
Nah, since we model fluids we tend to not go further than FD/FV
Finite element fluid dynamics is pretty complicated I thought <_<

I meant we won't be using FE, not that it won't be more complicated
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