November 2nd, 2011


Scientific questions from a dullard

  1. "The Earth rotates on a 23 degree axis"-- relative to what?

  2. What's the relationship between frequency and wavelength? Are they independent? If I halve the wavelength does it double the frequency?

  3. When light is described in terms of wavelength (630nm laser) what does that mean? What does 630nm represent?

  4. What is a hertz? (as in gigahertz)

  5. Why do they call it the kernel trick? What does kernel mean in this context? Is it the same as the null space of a transformation?

  6. How does unsupervised feature learning work? ANSWER IN ONE SENTENCE OR LESS USING NO E'S

Really fascinating talk. I ♥ Professor Ng