How to keep track of what you've learnt • Hacker News Board

Re: How to keep track of what you've learnt

#31

Post by c00p3r » Sun, Nov 15, 2009, 3:39 PM UTC

atlei wrote: post #29

c00p3r wrote: post #28

If you want to master a new technique on your sport, the best way is to repeat it as many times as possible until it becomes second nature for you. Wrong. The best way is to create as many as possible associations of different kind - abstract, visual, verbal. The net of connected associations (or a mental map) is the key, not a while loop. Write a list, picture your associations. Read aloud and capture it to a webcam…

Well, you're both right, as you are talking about two different types of memory. Associations are best with "normal" memory, but with sports (or piano/instrument playing, or touch-typing etc) we're talking about muscle memory, and there is no way around repetition-repetition-repetition

Sure! That repetition is called practice, which is the best teacher.

Re: How to keep track of what you've learnt

#32

Post by rsaarelm » Mon, Nov 16, 2009, 12:50 PM UTC

rsaarelm wrote: post #5

I write down things I want to remember later in Emacs org-mode files. It would be easy to set this up with org's SCHEDULED marker. Just make a macro to emit a bunch of SCHEDULED markers for suitably spaced future dates, run it on new items, and review the items when they come up in the agenda in the future.

And looks like someone's making an add-on to org-mode that implements the spaced repetition with an actual Supermemo-style algorithm instead of an inflexible fixed scheduling: http://www.mail-archive.com/emacs-orgmode@gnu.org/msg18554.h...

Re: How to keep track of what you've learnt

#33

Post by unperson » Tue, Nov 17, 2009, 2:19 PM UTC

mahmud wrote: post #27

camccann wrote: post #14

Earlier quoted context omitted.

Maybe I'm being obtuse, but why not? The radius and tooth count appear to be the same on all four, and the directions of rotation match if each turns opposite the two it touches.

Because the gear movement vectors add up to a vector equal to the applied force, but opposite in direction :-D Remember, the magnitude and direction of a vector are the sum of the magnitudes and directions of the vector components. If you applied a given force to any of the gears, in any direction, you could tabulate the resulting forces and directions and add them up. What you will have then, for the image, is a fou…

If you apply clockwise force of magnitude N to green gear, you would be applying +N. Which would apply -N to yellow (not +N as you stated), +N to blue, -N to red, and +N to green again, thus rotating the gears. You obviously have a better understanding of this than I do, but you must be explaining some part of this equation incorrectly.