Recent content by JayKo

  1. J

    Silvaco Software code or script

    hi andy2c, thanks for your reply, i have managed to get it work, the solarex01.spec is a generic file supplied by silvaco, i need to get specific solar spectrum from ASTM to get it done, which I already did. as for the x and y i did read through the manual and manage to get it done. thanks...
  2. J

    Silvaco Software code or script

    sorry to sidetrack here, any expert in Silvaco Atlas here? I got some question on solar simulation command called beam, it currently read a filed called solarex01.spec but I'm not sure if this is the spectrum for AM 1.5 1 sun, is anyone can verify here? thanks
  3. J

    Why in Quantum Mechanics is about energy but no force

    i see, i learned it in my QM1 course on ehrenfest's theorem, i can better appreciate QM now after the good insight you guy have shared with me, thanks folks :D
  4. J

    Why in Quantum Mechanics is about energy but no force

    you're must welcome, i learn more than a classroom can offer in here.
  5. J

    Why in Quantum Mechanics is about energy but no force

    i get it. the field as in light passes alongside massive object get bend, the field theory. why is that so when you said QM seemed more and more to support a view that is incompatible at small scale? QM is the explanation for ultra small scale. GUT is still unable to combine ultra small with...
  6. J

    Why in Quantum Mechanics is about energy but no force

    yes, the uncertainty principle comes into play, i got it now, thanks for clearing my doubt ;)
  7. J

    Why in Quantum Mechanics is about energy but no force

    i see, i getting a clearer picture now, but if physicist really want to measure expectation value of acceleration in QM, it can still be done right. I remember few years back IBM published that they managed to manipulate some element's atom and measure the force required and it is about few...
  8. J

    Why in Quantum Mechanics is about energy but no force

    mind to tell me more? so far i have read Griffth's intro to QM but force is totally out of the picture. is it the Heisenberg principle or something else?
  9. J

    Why in Quantum Mechanics is about energy but no force

    ok, don't mind to tell me the force field concept here? i know netwonian mech is not applicable in QM, but isn't we should have classical mech equivalent of Newtonian mech in QM although the force is super small. :biggrin: cooking skill in law school is not a good example in my opinion for...
  10. J

    Why in Quantum Mechanics is about energy but no force

    In classical mech, we heard of force, but in quantum there is no force mentioned at all. why? I am rather puzzle by this fact.
  11. J

    How to decompose the below fraction into sum of 2 terms.

    as below, my math is getting rusty, hope some can help me out. thanks. \frac{1}{1+\frac{1}{x}}
  12. J

    Fabrication of Single GaAs Solar Cell by MBE

    Hi Kevin75081, Thanks, so the point is to trying out the materials and thickness to have a contact resistance of few ohms? I will first do without AR coating and measure the contact resistance. right now the contact to the bus bar is by soldering to a 0.02 diameter gold wire. without the AR...
  13. J

    Fabrication of Single GaAs Solar Cell by MBE

    sorry for the incomplete info. is a single junction with GaAs (100) as substrate here is the picture. as for the dopant concentration, and layers thickness. it is still yet to finalize, as I'm still working on dummy sample set. thanks. http://img819.imageshack.us/img819/1641/76048936.jpg...
  14. J

    Fabrication of Single GaAs Solar Cell by MBE

    Fabrication of Single Junction GaAs Solar Cell by MBE Hi All, My project is to produce 1 single piece of GaAs solar cell (about the size of 1cm square) by MBE technique. I have gone through some read up and simulation software software called atlas by silvaco. for time being, I am testing on...
  15. J

    Forming a Star: What Drives Gas & Dust Clusters?

    ok, this is something new to me, all this while, has been taught that only gravity play the role.
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