183 reputation
6
bio website stevenlu.net
location Burlington, MA
age 25
visits member for 2 years, 6 months
seen Aug 27 '13 at 1:07

Dec
17
comment Calculating stress without strain
Can anybody come up with a partial differential equation which may have something to do with planar stress?
Dec
16
comment Calculating stress without strain
Thanks for commenting. These links and directions will help me a lot.
Dec
16
comment Calculating stress without strain
This is great. I need to do a bit of studying up to find out what particular PDE's I want to come up with FEA solvers for, then see how far I can get. I'm going after real-time speed and you are showing me that it is definitely possible. Accuracy is not paramount either, but the more variables I can tweak for different effects, the better. Got a long road ahead of me but this will be spectacular if I can pull it off.
Dec
15
awarded  Tumbleweed
Dec
10
comment What is escape velocity? In reality, how can something no longer be under the gravitational influence of something else?
I would say the important bit is that the velocity will tend toward some constant value as t->infinity. Like an asymptote. It doesn't need to go to zero.
Dec
8
asked Calculating stress without strain
Dec
8
revised The effect of an EMP on circuits
added 3 characters in body
Dec
8
asked The effect of an EMP on circuits
Dec
6
comment What happens to a rotating rod that breaks in two?
Sorry. I think I was meaning to say Conservation of Rotational Kinetic Energy. I do understand the notion of measuring Angular Momentum from a point outside an object. Even if it travels straight while not spinning it is a nonzero value so long as it is offset from the path
Dec
6
comment What happens to a rotating rod that breaks in two?
okay. the notion of conservation of angular momentum is silly because it is the total energy which is conserved. It can change into different forms freely (as it often does in the typical roller coaster examples).
Dec
6
awarded  Editor
Dec
6
revised What happens to a rotating rod that breaks in two?
added 295 characters in body
Dec
6
comment What happens to a rotating rod that breaks in two?
Thanks for editing tags and title. Much better. :)
Dec
6
awarded  Student
Dec
6
revised What happens to a rotating rod that breaks in two?
edited tags
Dec
6
asked What happens to a rotating rod that breaks in two?
Oct
6
comment Effects of high frequency lighting on human vision?
I think a lot of my questions could be completely answered if I just had the proper equipment for performing some scientific testing. An oscilloscope would allow me to figure out the duty cycle, and light power meters too for finding out intensity.
Oct
6
comment Effects of high frequency lighting on human vision?
That is definitely a good idea because it would take into account actual cognitive performance based on vision rather than relying purely on how it "feels".
Oct
5
comment Effects of high frequency lighting on human vision?
Yes I am aware of that. The variable I'm concerned with isnt the logarithmic response, it's the relationship between high (well, 120hz isn't that high) frequency modulations which contain the same average energy.
Oct
5
awarded  Supporter