Recent content by Sandbo

Hi, I have been having this question for a long while. From Pozar's book (Microwave Engineering), on page 336, when he was solving for the resonance response and the Q factor for a Lamba/2 resonator terminated by an open circuit, and coupled to the feed line through a series capacitor, at some...

Thanks a lot for your replies, I talked to my supervisor, he said the NiCr alloy is used also in the cryogenic microwave attenuators we are using in the fridge, which means they can stand low temperature without going superconducting. In this case I will go ahead and use it for now, and as you...

Looking up on the manufacturer's website for the composition, it said the resistive elements are mainly Nickel(97.72%) and Chromium(2.28%). Nickel is not superconducting at 3K, however Chromium just goes superconducting at 3K. Nickel is magnetic which would surpass superconductivity, still...

I am trying to use a metal film resistor to limit the current inside a dilution fridge (to reduce noise power from it), but I couldn't confirm if the metal film resistor is going to survive (or it goes superconducting) at ~3 Kelvin, searching a bit on the web but still I couldn't find the...

Thanks a lot for your statements, they are very clear and much better than any books I have read. And for the second concern, I understand that, after you all have stated the range of possible outcomes, how the equation of P(X<min(Y,Z) was computed; I was just sad about not being able to observe...

Thanks so much for your clarification, I have been spending so much time on all these seemingly very basic concepts, but still I have trouble getting them. Would there be a more efficient way in acquiring the sense in probabilistic calculations? Somehow it's hard for me to observe P(X<Y<Z)...

Thanks to all for your inputs, for the P(X<min(Y,Z)), can I say that it is: P(X<min(Y,Z))=P(X<Y|Y<Z)+P(X<Z|Z<Y)? and also would P(X<Y<Z) be equal to P(X<Y,Y<Z)?

Oh yes, I am very sorry for the typo. For the 6 possible orderings, did you mean X<Y, Y<Z, X<Z, Z<X, Z<Y, Y<X? Out of them, what can I do with that?

For X, Y and Z are iid, I have actually seen many versions of solutions, and personally I can write out the multi-variable integration one: ∫∫∫f(x,y,z)dxdydz, for x from -inf to y, then y from -inf to z, and z for all values, generally. But from a book there is another method...

Homework Statement Given that X and Y are i.i.d. r.v, and E[X]<infinity. Any idea how to prove that E[X/X+Y]=E[Y/X+Y]=(X+Y)/2? Homework Equations The Attempt at a Solution I know that E[X] or E[Y] are constants, how come it now says E[X/X+Y] = (X+Y)/2 which is a r.v.? and for X...

One short answer would be quantum computing/information. You probably have heard about people trying to make quantum computer, it's all about applying quantum physics knowledge in order to create a computer that works in a different way from the one you are using now, eventually achieving a...

Thanks a lot for the kind reply! The reasons are very convincing to me.:-p

Hi, I have a question regarding the change in charge carrier concentration change. For a given semiconductor, say Silicon, when it is not doped, it is easy to understand that {n_0} \times {p_0} = n_i^2, however, on doping with donors to form a n-type semiconductor, we have {n_0} \approx...

Trying to ans own question: for a wave A = Ao cos(kx-wt), in case of an increased t, from the relation (kx-wt), the particle possessing same amplitude should have been shifted to the right(in (kx-wt), x is also increased to oppose the change of t making (kx-wt) a constant to keep the...

Allow me to have one follow up question, why it should be kx-wt ending up with a relationship of v = (positive w) / (positive k)? The sign before w is a negative sign(-).:confused: And in the same way when we consider a wave Acos(kx+wt), we say v = k/-w and the wave propagate in -x...