ziedaniel1

5 ms·

1.
by ziedaniel1 1y ago
A little bit too concise IMO. E.g. it doesn't really explain where the normal equations come from and it mentions eigenspaces without ever defining them.
2.
by ziedaniel1 2y ago
What are some others?
3.
by ziedaniel1 2y ago
I did make sure to check before posting. Good point about the signed integer overflow, though!
4.
by ziedaniel1 2y ago
I used GCC and checked that it wasn't optimized out (which actually surprised me!)
5.
by ziedaniel1 2y ago
Very cool idea - but unless I'm missing something, this seems very slow. I just wrote a simple loop in C++ to sum up 0 to 2^30. With a single thread without any optimizations it runs in 1.7s on my laptop -- matching Bend's perform
6.
by ziedaniel1 3y ago
A couple details worth noting: - `repr` often outputs valid source code that evaluates to the object, including in the post's example: running `datetime.datetime(2023, 7, 20, 15, 30, 0, 123456)` would give you a `datetime.datetime` obj
7.
by ziedaniel1 3y ago
Do you have a source for that? I thought it was closer to 5pJ/byte.
8.
by ziedaniel1 4y ago
I enjoyed the easter eggs!
9.
by ziedaniel1 5y ago
(Yeah, I was not a TA then -- I took it under Paxos in Spring 2014 but only TA'd it after the switch to Raft)
10.
by ziedaniel1 5y ago
As someone who TA'd 6.824 (Distributed Systems) twice, I 100% agree. It's easier to halfway understand Raft than to halfway understand Paxos, but implementing a consensus algorithm correctly requires understanding it fully. Once y
11.
by ziedaniel1 5y ago
This sounds like you're describing energy-based models, not diffusion models.
12.
by ziedaniel1 7y ago
I think you misread slightly. > All of these algorithms take constant time, i.e., time independent of the input coefficients for any particular (n, c). This means that once you have chosen a particular n and c , the time no longer v
13.
Notes on Contemporary Machine Learning for Physicists [pdf](sites.krieger.jhu.edu)
8 points by ziedaniel1 7y ago|0 comments
14.
by ziedaniel1 8y ago
Oh, good point, I didn't read what you wrote carefully enough.
15.
by ziedaniel1 8y ago
Actually, the illegal memory access would be undefined behavior, so it's fine for the compiler to assume that it's living in a world where the segfault never happens. Thus, it can optimize away the extra reads. If this weren'
16.
by ziedaniel1 9y ago
The center core is new, but the side boosters are both recycled. See https://en.m.wikipedia.org/wiki/List_of_Falcon_9_and_Falcon_...
17.
by ziedaniel1 9y ago
I enjoy MealSquares: http://mealsquares.com . A bit expensive, but fulfills many of the same objectives.
18.
by ziedaniel1 9y ago
The very same airport, in fact. They accidentally turned off auto-throttle and took far too long to react to the falling airspeed.
19.
by ziedaniel1 10y ago
I think you mixed up m/s and km/s. The speed of light is 300,000,000 m/s, so 30,000 m/s is only .0001c. At 1g, it actually takes a month to reach .1c. (Still, your point stands.)
20.
by ziedaniel1 10y ago
Wow, can I read more about the circum-planetary superconductor idea somewhere? I thought this sort of thing wouldn't work because superconductors lose superconductivity once currents get too high, as you mention.
21.
by ziedaniel1 10y ago
To get the key ideas behind many of these topics, you could try reading Evan Chen's Infinitely Large Napkin: http://www.mit.edu/~evanchen/napkin.html
22.
The Napkin Project(mit.edu)
1 points by ziedaniel1 10y ago|0 comments
23.
by ziedaniel1 10y ago
I believe you use timing differences, not parallax (it takes ~40 ms for gravitational waves to travel through Earth).
24.
by ziedaniel1 10y ago
Wasn't TSX only enabled on Xeons to begin with?
25.
by ziedaniel1 11y ago
That's assuming that they're independent, though, which is certainly false. I'm curious by how much.
26.
by ziedaniel1 11y ago
Great - sorry for the harsh words, I guess I've just come to expect people to screw up distributed systems :)
27.
by ziedaniel1 11y ago
"Due to the nature of Raft, there is a very small window (milliseconds) where a node has been disposed as leader, but has not yet changed its internal state. Therefore, even with the leader check in place, there is a very small window
28.
by ziedaniel1 11y ago
What's the biggest bottleneck for better forecasting: better observations, better models, or better supercomputers?
29.
by ziedaniel1 11y ago
This is really cool! However, I was somewhat disappointed that it only models a linearizable memory (each low-level operation atomically acts on the same global state). It would be great to teach people that they can't actually think
30.
by ziedaniel1 11y ago
The inability to edit or append to files is not really a fundamental limitation of this approach - it would just require some more bookkeeping. Reading back data, of course, is (by design) impossible.

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