pixcavator

10 ms·

61.
by pixcavator 15y ago
>universe could be a type of cellular automata itself The problem with this idea is that the universe, unlike any grid, is isotropic (or appears to be). That must be the reason why you don’t see examples of, for example, circular waves
62.
by pixcavator 16y ago
It’s not a bad approach. However, the lectures are the only results I can see right now. I criticize the results that I see. And you don’t refute my points. You just see “the sign of weak criticism”.
63.
by pixcavator 16y ago
I remember winging teaching as a TA. After 10+ years I know I stunk, no offense.
64.
by pixcavator 16y ago
>I got rave reviews from students. How many of them did you fail?
65.
by pixcavator 16y ago
This book has taught me a good deal of algebra. It's self-teaching.
66.
by pixcavator 16y ago
OK, how about a practical example? In all Khan’s lectures on linear algebra find an explanation of how it contributes to calculus.
67.
by pixcavator 16y ago
You didn’t follow any of the links, did you?
68.
by pixcavator 16y ago
Always spell-check! Thanks.
69.
by pixcavator 16y ago
Wrong. Mr. Khan needs experience teaching real students. Oh yeah, and a PhD in every field he wants to “disrupt”. Just kidding.
70.
by pixcavator 16y ago
tl;dr OP is an insider, and therefore I reject his criticism of an outsider.
71.
by pixcavator 16y ago
>>...humanness (respect, fairness)... “Cheapness” is the word you are looking for.
72.
Khan Academy: the bad(inperc.com)
42 points by pixcavator 16y ago|77 comments
73.
by pixcavator 16y ago
A good way to deal with recommendation systems that avoids these problems is via flows on graphs. Here’s one method of converting individual ratings to global rankings. Each alternative A, B, C, etc is a node of the graph. Now, when the use
74.
by pixcavator 16y ago
"Insulting" is a gross exaggeration. That's this forum's style! Where do you think I’ve learned it from? You and the parent both admit that I have a point. That’s good enough for me.
75.
by pixcavator 16y ago
Compare: "Khan Academy is hiring full-time profs". Who needs those? Everybody can teach, apparently.
76.
by pixcavator 16y ago
You only need rote manipulation to help your conceptual understanding, and maybe learn some algorithms.
77.
by pixcavator 16y ago
>>i believe robots will see the world, but it will be through their eyes/sensors, not some human like approach. One of the biggest, and very immediate, obstacles in computer vision is the inability to extract 3d information from 2d
78.
by pixcavator 16y ago
In my experience, it’s the transition from 1d to 2d that’s the most important. You learn the concept in 1d, then carefully transition to 2d while still keeping an eye on the 1d case and on what the extra dimension contributes. The understan
79.
by pixcavator 16y ago
Will there be time when everybody keeps his stuff at his own site and all of these "communities", aggregators, middlemen die out?
80.
by pixcavator 16y ago
In mathematics you don't understand things. You just get used to them. -- John von Neumann
81.
by pixcavator 16y ago
Int[ 1/Sqrt[3+5x^2], {x}] can't be copyrighted but a problem set that consists only of exercises as routine as this would be almost worthless. A cross referencer is a neat idea though.
82.
by pixcavator 16y ago
My site is a wiki similar to what you describe, http://inperc.com/wiki/index.php?title=Category:Courses . I would like to allow comments but afraid of spam. Maybe one day.
83.
by pixcavator 16y ago
Yes and yes. A formula is better if it reveals more of the math behind it, in a compact form.
84.
by pixcavator 16y ago
It's not as good! You can get it from the original formula easily, but not vice versa.
85.
by pixcavator 16y ago
I’ve been always wondering, with all this variety, can the Game of Life model such a simple process as a circular wave? I can’t find anything about that.
86.
by pixcavator 16y ago
It allows a stylus... probably!
87.
by pixcavator 16y ago
I just wrote a short blog post on different kinds of places to find math online: http://inperc.com/blog2/2011/02/24/math-online/ .
88.
by pixcavator 16y ago
I have HP Slate. It's "Win7 tablet with desktop software" which is exactly what I wanted.
89.
by pixcavator 16y ago
I am afraid they lack the background to pull off "the future of education", certainly not on the college level. Sorry for being harsh.
90.
by pixcavator 16y ago
Good idea but why make thing so complicated? Research papers isn’t code -- they don’t have to "compile". Just write what you want in your blog/site/etc and link. If you want it all in one place, set up a wiki.

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