meta user
network profile
| bio | website | |
|---|---|---|
| location | London, United Kingdom | |
| age | 28 | |
| visits | member for | 2 years, 3 months |
| seen | Dec 3 '12 at 15:05 | |
| stats | profile views | 229 |
Phd student
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Jul 18 |
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Are there books on Regularization and Renormalization in QFT at an Introductory level? There was a recent blog post about these issues that you might find useful, it's here: motls.blogspot.com/2011/07/… |
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Jul 17 |
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How to determine the mass of a quark? @David: I think a good answer to the question would cover both of our interpretations. I would attempt to do so but I am sure that, before long, someone else will answer it more clearly than I could. |
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Jul 17 |
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How to determine the mass of a quark? Given that this sounds like a "how do we measure.." question, I would suggest the 'experimental physics' tag. ;-) |
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Jul 17 |
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Poincare group vs Galilean group Could you perhaps exchange the equation numbers to the equations themselves please? |
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Jul 16 |
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The Ozma Problem I tend to just look at the back of my hands with my fingers and thumbs straightened, the left hand makes a nice 'L' shape. Not sure this is going to work for those aliens though ;-) |
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Jul 16 |
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Is there any way to increase a rubber-bands lifetime? OK, can I have some "prizes" please?! I think you meant 'prices' @Georg, +1 for a good answer all the same ;-) |
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Jul 16 |
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Commutation of operators in quantum theory 'Notation' tag might be apt here |
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Jul 15 |
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what is an inverse femto barn? It's a shame we don't have an awards system such that I could nominate this answer. (+1 needless to say.) |
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Jul 15 |
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real world applications of Mathematics which use functions with singularities, not just as a matter of mathematical taste but for conceptual reasons I agree with @Zev C: this should be a community wiki. |
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Jul 13 |
awarded | Civic Duty |
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Jul 12 |
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How to predict how much data to collect I was just getting my head around the details of what you wrote and I have a quick couple of questions, I hope you don't mind. 1/ In the order-of-magnitude estimate are you saying one can take $N_{\rm events}^{-1/2}=f$ and solve for $N_{\rm events}$? I can replicate your "decades" prediction in this way but - where you said "your measurement of a modulation will have an error of order $N_{\rm events}^{-1/2}$" shouldn't it have had a positive power? 2/ What was the motivation for you choice of $\hat B$? I'm afraid I just can't work out where this bit comes from.. |
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Jul 12 |
accepted | How to predict how much data to collect |
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Jul 12 |
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How to predict how much data to collect thank you so much for taking the time to answer, this is exactly what I was after, with more detail than I had expected. Thanks again. |
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Jul 12 |
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How to predict how much data to collect @David: I guess it is a kind-of self inflicted homework but I did try to phrase the question so it would serve a somewhat broader pedagogical interests. Not least as the answers already given illustrate an example of how to perform a mathematical proceedure for planning a real experiment. IMO it wouldn't take a huge leap for someone to apply the proceedure outlined in the answers to a different prject / experiment. That said if you still feel the homework tag is unnecessary, feel free to remove it. |
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Jul 12 |
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How to predict how much data to collect @Ted Bunn: Yes, in theory it would be possible for me to match the collected data (time-stamped detection events) with a known phase. In practice this may be a little more difficult as the phase is not quite constant and would need regular adjustments. Unfortunately the detector will be place in a somewhat hard-to-reach site so the practicalities of accessing it regularly may prevent me doing so. Regarding whether the events are Poisson distributed, I'm not overly familier with the science/stastistics of RVs, but having looked it up I get the feeling that the event rate here most probably is. |
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Jul 11 |
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How to predict how much data to collect clarify meaning without changing it |
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Jul 11 |
asked | How to predict how much data to collect |
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Jul 1 |
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Show that the electric field E in the system at rest is $E=\frac{Q}{4 \pi \epsilon_0 \sqrt{(x^2+y^2+z^2)^3}} (x,y,z)$ ..perhaps. Also, are you sure this shouldn't have had a special-relativity tag instead of GR? |
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Jul 1 |
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Whats the range of dimension exponents in the SI Units system? A combination of these two pages may be of some use: en.wikipedia.org/wiki/SI_prefix, and en.wikipedia.org/wiki/Dimensional_analysis |
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Jun 30 |
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maximum rotational speed @Marek's answer in @voix's linked-question seems to answer it for me. Good question all the same :-) |
