| |
| |
| |
|
Page: 1 2
Comments:
<0> "The scientific community was united in believing [a chemical oscillator] to be impossible." http://www.hermetic.ch/pca/bz.htm
<0> I thought they were easy to build...
<0> You have two chemicals S and C. S normally decreases at a linear rate, and C normally increases at the same rate, but the presence of C makes S increase at a rate proportional to the amount of C and the presence of S makes C decrease at a rate proportional to the amount of S.
<1> g'nite #physics !
<2> ...so is this, like, the Feynman fanclub or something?
<3> who is feynman?
<2> Good question. I'm not sure if I even name-dropped someone from the right field of study. >_>
<3> heh
<3> you're thinking of feingold
<4> *Brennan
<2> Close, I was thinking of Feynman - I just can't remember what the heck he/she/it actually did.
<2> I would've just pulled Newton as a backup plan, put that's kinda clichd. :/
<5> Feynman is famous for being good at explaining physics
<3> microacg: !
<3> you interfered with a good troll
<5> oh sorry
<3> i'm putting you on probation
<3> =)
<4> ive already staked my troll claim on this real estate
<3> hah!
<2> goose: bzzzt, wrong!
<6> hello
<2> goose: I **** at trolling.
<3> =)
<3> hello bleech
<6> % Solve[x^2+1==0]
<6> Solve[x^2+1==0]
<5> mbot is dead lately
<6> hehe
<6> what happened to it
<5> I don't know
<4> mbot's idle at the moment
<4> getting some mcola
<5> heh
<7> PHYSICSMASTAAA: im sorry, that claim was already made by hondje years ago
<4> I have yet to see a single post by this "honje" character
<7> PHYSICSMASTAAA: hes been gone recently...
<3> he has been eaten by bears :(
<8> what do you guys think the terminal velocity is of a car falling from the sky?
<3> 400mph
<7> krustofski: 3 in appropriate units
<8> :-\
<9> I have a question, thats a little off the topic of physics.....whats the worst someone can do to me, if I allowed them real vnc remote access to my computer??
<9> can they download a virus or spyware
<10> VNC allows view-only access. Just use sshd though. No reason to send the video of your desktop to them in realtime.
<7> Pradalover: steel bank codes, credit card numbers, p***words...etc
<7> *steal
<9> they can
<9> even if they are not connected
<7> no they need to be figure out a way to watch you
<9> he programs in ***embly and Java
<9> and has his masters in physics
<7> although it should be fine provided your not doing that stuff while somone is connected
<10> If someone logs on with VNC, they get a grainy, jittery video of what's on your desktop. If given full access they can simulate pretty much any keyboard and mouse command, including download files.
<9> well they had full access
<9> enough to move mouse and download files
<9> but what can they do without me knowing or watching
<10> Um, maybe.
<9> can they dowmload files without my knowledge
<9> look through my PC while connected and search files without me knowing or watching
<10> Don't blink. I don't really know. Why would you ever do that?
<9> can i look back in my admin tools and find out where he was
<10> Can you find out where you were?
<1> g'd mornin' #physics !
<7> 'lo
<11> hya
<12> JabberWalkie: are you there?
<7> yeah
<12> your potw is hell
<12> i tried solving with spherical harmonics exploiting azimutal symmetry :(
<12> don't ask
<5> it's probably not that hard
<6> hello
<6> there is definitely azimuthal symmetry
<12> bleech: of course there is
<12> bleech: have you tried also?
<6> yea
<6> i think i got it
<12> did you try usings the green function G(r,r') = 1/4pie_0 1/|r-r'| + f(r,r')?
<6> well i had to solve some diff equations
<6> but i didnt use green's function to solve either
<6> you could probably use it to solve one
<12> of course we strt with laplace phi = - 1/e_0 rho
<12> what did you use?
<12> well the boundry condition is definitly neumann we have given dphi/dn =-E*n
<12> where dphi/dn = grad phi * n
<12> where * denotes scalarproduct
<12> bleech how did you solve?
<6> i dont want to spoil it for others :o
<6> check the private msg
<12> i got no privmsg
<6> you didn't?
<12> no
<6> oh
<6> i am unregistered
<6> wont let me pm
<12> then register
<12> so laplace phi=0
<12> we approximate phi using spherical harmonics
<12> phi = sum_l=0^oo sum_m=-l^l R_lm(r)Y_lm(phi,theta)
<12> on this we use the laplace operator in spherical coordinates
<12> 1/r^2 d/dr (r^2d/dr) + 1/r^2 laplace_phi,theta
<12> that will get us phi= sum_0^oo (2l+1) 8A_lr^l + <B_lr^(-l+1)]P_l(cos theta)
<12> exploiting azimutal symmetry
<12> right?
<12> JabberWalkie: what do you say?
<13> morning // Jreggelt!
<7> oh woops
<7> got distracted...
<7> seems as though Manyfold is almost right.....he has some strange factors left in there....
<7> the form of the equation is correct....
<14> hello
<14> what is a good beginners physics book on mechanics
<15> aRevolutionist: "beginner" means "high school student", "first year physics student at university" or something different?
<14> self taught seeking to completely comprehend physics
<15> "completely comprehend physics" sound optimistic :) /(just
<15> (just kidding)
<15> if you are not scared of thinking a lot of what it is written Feynman books are a cl***ic
<14> okay
<14> should this be fine ?
<14> http://search.barnesandnoble.com/booksearch/isbnInquiry.asp?z=y&EAN=9780201021165&itm=33
<15> aRevolutionist: I think so. Beware that there are 3 books called "Feynman lectures on physics" and I guess you are interested just in the first (the second deal with electromagnetism and the third with quantum mechanics)
<14> i see
<14> i currently only want a document on mechanics
<15> a bit off topic: I just discover that http://en.wikipedia.org/wiki/Sokal_Affair . I'm laughing since ten minute and I cannot stop myself :D
<12> bleech: are you there?
<15> ciao salvolo :)
<16> Anyone recommend particular undergrad optics books?
<15> markstra: if optics means lasers i recommend "Siegman"
<16> yea, i've checked that out before for a laser project. It was quite helpful.
<16> But i was thinking something more general - covering physics and geometric treatments of light.
<16> Chances are I probably won't need anything. I imagine there's more than enough material online to get by (plus it's kind of a simple topic to have an entire course dedicated to)
<15> markstra: the standard reference is "Born and Wolf" but is very hard to read
<17> http://optics.byu.edu/textbook.aspx is free.
<16> thanks. I'll give it a look anyway. And even if it doesn't seem worthwhile to buy, at least keep a note of it in case i need it later.
<16> handy. Thanks xtmdster.
<18> Say now, can't we have a three-dimensional microscope that works with lasers?
<19> Ello
<19> :-D
<20> kanzure: Why would you want one, when STMs work so much better?
<18> STMs?
<20> scanning-tunneling microscope
<18> No idea; I do not even know how the STM works.
<20> kanzure: That's from an electron microscope, though.. but quite 3D, wouldn't you agree?
<18> Looks like 2D data to me. Where's my rotation tool? We can't keep on going back to the lab if I want to change the angle of view just by a few <whatever units we're working in>
<20> The 3D data is encoded in brightness of individual pixels. Now, if you want to view things that are in shadow, you'll need to rotate the sample while scanning - but that should work just as well with a SEM as with a lidar microscope
<21> how is it able to form those shapes?
<21> what mechanism in physics is responsible for that coordination
<16> a laser microscope (any optical microscope) would be highly limited in resolution, though
Return to
#physics
or
Go to some related
logs:
mdot utf-8
#css
3c905c geexbox
#math
#osdev
#perl
linux root autologin
#ubuntu
Snakebite apt-get
#sdl
|
|