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salty_biscuits

1,205 karma · joined December 4, 2017

Just another person. I tried to write a blog for a bit and got lazy.

https://paulbellette.github.io

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salty_biscuits··on Jacksonpollock.org (2003)
Dada as a specific example was basically trolling in response to the absurdity of the world at the time.
salty_biscuits··on Principal Component Analysis
Sure you can muck around with matrix exponentials and matrix logarithms to think about such things

https://en.wikipedia.org/wiki/Matrix_exponential

salty_biscuits··on Spotify CEO: musicians can no longer release music only “once every 3-4 years”
Isn't it just the age old problem that most people like crap and people who like art aren't willing to pay for it?
salty_biscuits··on YOLOv5: State-of-the-art object detection at 140 FPS
Well, very unlikely to get the original author. He doesn't do that kind of thing anymore

https://twitter.com/pjreddie/status/1230524770350817280?s=19

salty_biscuits··on We built a new GPS receiver engine
Is is really for missiles. Same reason the ITAR limits for accelerometers and gyros are relatively high (I think like 10g for acceleration). Same again for vibration tolerance. It is a barrier to entry for making a navigation system for missiles.
salty_biscuits··on GM self-driving tech unit Cruise laying off about 8% of staff
I think it is especially relevant in the time of coronavirus to also consider the idea that maybe you just don't need to go into work all the time (or even at regular times) for a large percentage of workers. Just have less cars on the road by running society a little differently.
salty_biscuits··on Bullshit Ability as an Honest Signal of Intelligence
It's from Procrustes, the guy who chopped your feet off to make you fit in the bed in greek myth. You find Procrustean analysis in mathematics, where you try and find the closest approximating matrix with a certain property to another given matrix (like it is a rotation matrix etc).
salty_biscuits··on Introduction to Support Vector Machines in Machine Learning
I think they said "aspire to", not start with. I would start with a naive bayes classifier, understand why it is naive and then go from there.
salty_biscuits··on Email may have tainted Stanford coronavirus antibody study
Maybe loose terminology so ending up getting case fatality rate confused with mortality rate?
salty_biscuits··on Why are Soviet math textbooks so hardcore in comparison to US textbooks? (2017)
What's wrong with a low bar to tertiary education? It lets disadvantaged kids get in and catch up. As long as the standards are high by the end everything is fine right?
salty_biscuits··on Ask HN: What is your blog and why should I read it?
This is my blog

https://paulbellette.github.io/

I write stuff every now and again so I don't forget how to write. Contains random notes on stuff I have been thinking about. May contain traces of nuts.

salty_biscuits··on All models are wrong, but some are completely wrong
That rubbed me up the wrong way too. Applied mathematics is really quite transferable across disciplines, you just usually don't have the domain knowledge to stop you chasing dead ends or reinventing the wheel.
salty_biscuits··on What's a virus, anyway? The bare-bones basics
Source code, but pretend there is no error correction and your logic circuit is noisy? (or the details of the error correction are murky)
salty_biscuits··on PID Without a PhD (2016) [pdf]
Depends on your system!!! If you online tune and accidentally set P a little too big it is quite easy to set off an unstable oscillation and depending on your application can get a rather expensive earth shattering kaboom...
salty_biscuits··on The origin story of the N95 mask
I think your intuition on safety with gun ownership is culturally specific and maybe not the best example...
salty_biscuits··on MIT to no longer consider SAT subject tests in admissions decisions
That's true, I'm just pointing out that the normality of the distribution of the results alone proves nothing.
salty_biscuits··on MIT to no longer consider SAT subject tests in admissions decisions
If you had a multiple choice quiz with the actual questions hidden you would get a normal distribution in results. Anything where you sum lots of small random effects.
salty_biscuits··on California governor issues statewide 'stay at home' order
The tests aren't perfect. False positive and negative rates are non negligible. Not saying that they are not useful, just they don't solve the problem on their own.
salty_biscuits··on Ted Kaczynski's Manifesto [pdf]
And just like how I interpret Nietzsche in the context of him being the third wheel in an open relationship, this feels like someone who is reacting because they feel let down by the promises of "leftism" or society in general. It says more about the psychic state of the author than about the truth of the world.
salty_biscuits··on Koenigsegg’s 2.0-liter no-camshaft engine makes 600 horsepower
Honda super cub begs to differ. Only 90kg of materials and a fuel efficiency of 60 km/l plus...
salty_biscuits··on Open Source Time-of-Flight DIY Lidar
This is fantastic! I want to make one. Is it possible to get a cheap polygonal mirror? Then you can get more scans per revolution.
salty_biscuits··on To do better science, admit that you’re not objective
Weird to say post modernism. Post modernism started as post structuralism, which is all about critiques of false binaries...
salty_biscuits··on The patent on SIFT expired yesterday
My memory of the story behind getting it patented in the first place was because he was having trouble getting it published.
salty_biscuits··on Pollution from tire wear is worse than exhaust emissions?
Rubber has a density of 1500 kg/m^3, a tyre wears about 5mm before it needs to be replaced. If I say a tyre has a radius of about 0.3 metres and a width of about 0.2 metres and plug this into the equation for an annular cylinder I get about 2kg of material lost between new and needs to be replaced per tyre. I don't know how long tyres last for most people, but I would guess about 50000km. So I would expect about 0.2 grams per km from tyres...
salty_biscuits··on Ask HN: How to Handle Coronavirus Stress?
This too shall pass.
salty_biscuits··on 'Fear Factor' Is Running High as Currency Markets Resume Trading
Australia had a similar thing during the gfc and they managed to dodge a recession.
salty_biscuits··on An Intuitive Guide to Linear Algebra (2012)
Here are two reasons I think are important, there are more but these stand out. (1) Teaching is hard, and the amount of training you get in teaching higher level maths (rather than the just learning higher level maths itself) is very limited. (2) intuition in maths will lead you on a merry path to very wrong ideas. There are functions that are continuous everywhere without a derivative anywhere, Russell's paradox, classically zenos paradox, etc, etc. A big part of higher level maths training is in being precise with what you mean so that you can learn to do proofs and not trick yourself. I think a synthesis of these approaches is the sweet spot. Be precise but show applications to motivate the material.
salty_biscuits··on Fast Differentiable Sorting and Ranking
Reminds me of this older result by Brockett about using dynamical systems to do these types of problems that I always really found interesting

https://ieeexplore.ieee.org/document/194420

salty_biscuits··on Requirements volatility is the core problem of software engineering
As someone who has worked in both worlds, it is just a different sort of nonsense that you have to deal with. Typically the physical engineering thing is "we want you to work out why this weird thing is happening, then fix it, without us having to change anything operationally or spend any money." just a different flavor of the same crap.
salty_biscuits··on Gilbert Strang Teaches Linear Algebra
Ummm, what about say quantum mechanics as the first huge example off the top of my head..
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