Recent content by bowlbase

1. Anyone considering a career as a patent attorney?

I just want to say that I have been working for the USPTO for a while now and never would have considered patents if not for this thread. If anyone has any questions about the USPTO or working as a patent examiner I'll answer what I can.
2. General Optics Question

Yeah, its been several years since I've had any optics classes so I'm struggling to remember. I recall doing some matrix multiplication for compound lenses but I don't dare delve that deeply. I don't think it is impossible, just more effort.
3. General Optics Question

What 'd' should be used for calculating the power when including the third lens? So I have the first two lenses easy enough. But I'm not sure if I take the P12 to be the distance of the second lens, the average of the distance from 1->3 and 1->2 or just the total distance. I suspect it is the...
4. General Optics Question

I have all the dimensions of the lenses and distances between in the system.
5. General Optics Question

Homework Statement I have a compound thick lens problem that I need to find the sign of the refractive power. Homework Equations Thick lens equation and focal length equation. The Attempt at a Solution I believe all I need to do is calculate the focal length of the first two thick lenses and...
6. Relative Entropy or Kullback Leibler divergence

Nevermind, I've got it!
7. Relative Entropy or Kullback Leibler divergence

Homework Statement I am suppose to calculate the relative entropy between two sets of data: Base set Set 1: A C G T 0 0 0 10 0 0 0 10 0 0 10 0 0 10 0 0 10 0 0 0 * * * * //Randomized 0 0 0 10 0 10 0...
8. Hidden Markov Model

I think that I have found a way to do this, but I want to make sure it is correct. I believe that the equation is telling me to multiply the two probabilities (prob.to be ACGT within R or G and prob. that R or G changed) and then multiply all of those together. I'm just not sure about order...
9. Hidden Markov Model

Homework Statement Consider an HMM with two possible states, “R” and “G” (for “regulatory” and “gene” sequences respectively). Each state emits one character, chosen from the alphabet {A,C,G,T}. The transition probabilities of this HMM are: aRG = aGR = 1/4 aRR = aGG = 3/4 The emission...
10. DNA sequence evolution

You are right. I had a feeling that I was getting the opposite result that I was meaning to get. I should have realized I had them mixed up! Thanks!
11. DNA sequence modeled as 4 faced die

Oh, okay. I was worried for a second that I had done something else wrong. Thanks!
12. DNA sequence modeled as 4 faced die

Well, the ML method described in class was to take the binomial distribution's derivative, set it to 0 and solve for the probability. So that is the method I used. Is this not correct?
13. DNA sequence evolution

Homework Statement A strand of length L begins life as all A's. Assume that each letter evolves independent of all the rest until today, 1000 generations later. Within each generation there is a ##\mu## probability that the letter mutates to either C, G, T. Finally, assume that once a letter...
14. DNA sequence modeled as 4 faced die

I finally found time to sit and finish this, sorry it took so long. So, I found the maximum with the method I described initially and got the exact some result as if I had just taken the first "simple" method I thought of. It seems my first instinct was correct. Thanks for the help.
15. DNA sequence modeled as 4 faced die

My idea was handle each as either A or Not-A as you mentioned. Since I was explicitly given the hint to use the binomial and maximization likelihood. I don't believe we ever discussed the multinomial distribution but I can see how it works here. I think that since the problem is really just...