gabrielgoh

6 ms·

1.
by gabrielgoh 7y ago
(author here) default values are the best guesses for the parameters of the novel coronavirus based on my reading of the literature
2.
by gabrielgoh 7y ago
(author here) - that is correct, those aren't sliders, just waypoints
3.
by gabrielgoh 7y ago
good questions! (author here) I've had a hard time trying to find hard figures on these numbers, and am trying to steer as much from speculation as possible. Your second observation is a very good one. This is true, e.g. for the defaul
4.
by gabrielgoh 8y ago
See the literature on exact penalty methods. I believe the short of it is yes, for a large class of problems this works, but the new problem will not be necessarily easier to solve. In the case of the abs(.) function, the nonlinearity at 0
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by gabrielgoh 8y ago
email them
6.
by gabrielgoh 8y ago
I guess the author is not claiming a well rounded (low bias) introduction to ML to statistics, but a highly biased and specialized (low variance) course that is tailored to the author's own interests and tastes.
7.
by gabrielgoh 8y ago
the illustration shows 4 an approximation with quadratic curves. There's no point drawing the one with 8 as it would be indistinguishable, as the article points out
8.
by gabrielgoh 9y ago
I don't think so. This effect, at least as described, can change even as the phone remains static, e.g. if you head moves while the phone sits still on the table.
9.
by gabrielgoh 9y ago
could you clarify what you mean by an open-loop system, and why it must be compared with a closed-loop one?
10.
by gabrielgoh 9y ago
A simple example of this that has been shown rigorously is compressed sensing. Finding the sparsest vector, subject to linear constraints Ax = b is NP hard for general matrices, but is solvable in polynomial time if A satisfies the RIP prop
11.
by gabrielgoh 9y ago
is this a real concern? it should be relatively easy to distinguish life on earth from life on mars, should it exist. Especially considering it comes from a completely new path of evolution. Furthermore, a mars station would allow science t
12.
by gabrielgoh 9y ago
they did experiments on the 2016 Max-SAT challenge, which seems to me like a legitimate class of problem instances.
13.
by gabrielgoh 9y ago
i enjoyed the presentation, he has a flair for the dramatic.
14.
by gabrielgoh 9y ago
could you elaborate on this point? what you're saying sounds like dynamic programming, which does not reduce the state space at all, just saves on redundant computations (and is a favourite of programming interviews everywhere)
15.
by gabrielgoh 9y ago
When working over ssh, its handy to have a text editor for making small edits here and there. I'm very excited about this editor!
16.
by gabrielgoh 9y ago
6 word answer PCA is the SVD of A'A
17.
by gabrielgoh 9y ago
to those who are looking for a WYSIWYG editor which supports latex, try LyX. It's good and intuitive enough that I have used it as a tool for thought, and prefer to work straight from latex rather than a whiteboard or a paper and pen.
18.
by gabrielgoh 9y ago
A fascinating aspect of this entire kerfuffle is that the meta story, the one about sensationalism and "bad journalism" is too, a form of media sensationalism that plays to the ears of a more sober and skeptical audience who wants
19.
by gabrielgoh 9y ago
A great collection, but I thought the final diagram of http://www.datavis.ca/gallery/say-something.php that illustrated the orders of magnitude of radiation dosage was a great use of visual presentation to illustrate s
20.
by gabrielgoh 9y ago
It'd be interesting in hearing about how far along autonomy is with the model 3, it seems Tesla may be playing it down in this presentation?
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by gabrielgoh 9y ago
Its very tempting to believe that because most of math/science (e.g.) is incremental, that all math is incremental. Once in a long while I stumble onto something really new, a theorem or a proof which simply has no precedent. These thi
22.
by gabrielgoh 9y ago
i think this is the right approach, you're not after all, the person you were 5 years ago, or even a week. most interests change with time, I lose interest in a topic very fast, and gain interest in another topic just as quickly. No
23.
by gabrielgoh 9y ago
i agree completely, and that what's happening is nothing more than brute force search. Though I do think this is still interesting as the reward here is potentially much more well-conditioned than the rewards in RL. Having said that th
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by gabrielgoh 9y ago
I think an analogy can be made with Bayesian statistics. In principle, Bayesian statistics requires no training, just a way of sampling from the posterior, usually done with expensive MCMC methods. Here, we do not need training of any kind
25.
by gabrielgoh 9y ago
sounds like the ol' stone soup trick, where its all the extra ingredients which make the magic work, not the AI. I'd reckon a talented producer could make a good song out of pseudo-random notes. Unless the original untouched AI tr
26.
by gabrielgoh 9y ago
Fair point about the risk factor. I take the edit back! But I think our disagreement is philosophical. Ultimately I feel much of medical research is prescriptive - and thus there is no misrepresentation, except perhaps amount of uncertainty
27.
by gabrielgoh 9y ago
i'm saying that headline says too little. The authors of the paper strongly suggest that there is a causative effect in the paper, and I think its very reasonable this is reflected in the title of the headline. [edit] Even the title of
28.
by gabrielgoh 9y ago
Sure, counterfactual causation is the gold standard in science, but it is extremely difficult to pin down experimentally (in this case it requires an experiment, or a natural experiment, where people are forced to drink 2 drinks daily over
29.
by gabrielgoh 9y ago
for those wondering, what is on display are the level sets (3d contours) of a neural network. this is a very cool use of shaders for raytracing, but it is not terribly informative.
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by gabrielgoh 9y ago
you are correct about this, but I think what you frame as a negative is really a positive. I think the VC model is one of the only examples funding I've seen where really innovative, experimental and risky projects can even get a tiny

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