M Dash Foundation: C Cube Learning

Category: Methods

  • Why nothing moves faster than light !!

    There is an interesting discussion on twitter why “nothing can move faster than light”. I could not resist myself from a simple explanation I also think a similar one might have been given by Einstein himself, long time ago, so forgotten by most when they try to explain it. How does something go faster !!…

  • Just a note on signal analysis

    I was thinking about this a little..well from experience of the past decade (mostly more tha 3 years ago): When high energy physicists impose their selection criteria they usually think by making such criterion very tight (strict cuts) they end up removing more background and by increasing the figure of merit they have a clean…

  • Remarks about the 144 GeV bump found in CDF data analysis

    The first comments follow the discussion at this blog link: http://blogs.discovermagazine.com/cosmicvariance/2011/04/06/anomalies-at-fermilab/comment-page-1/#comment-158561 A few things are wrong here with some remarks (and misunderstanding) I point out one misunderstanding: the bump is a tail moving slowly as per Monte Carlo. “The bump is clearly a Gaussian so we can’t say it’s a tail that’s moving slowly because…

  • Monte Carlo: we expect snakes here.

    Monte Carlo: we expect snakes here. 1 Sigma: Isn’t that a tail? 2 Sigma: yes that’s a tail, but is that a snake? 3 sigma: thats definitely the tail, but did you see the hood? 4 Sigma: that’s a rattle snake. 5 Sigma: it bites you, you die.

  • How Radio-active are cigarettes?

    Units: 37 GBq = 37×10^9Bq = 1 Curie Radioactivity of Pb(210) and Po(210) Lead 210, 22.3 years, 207.2 g/mol… Q = 0.064 MeV (beta) Polonium, 137.376 days, 210 g/mol… Q = 5.407 MeV (alpha) Let’s assume the amount of lead and Po to be 0.5 micro-gram each in 1 cigarette. SO (0.5/207.2)x10^(-6) mol of Pb…