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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 Tesla faces U.S. criminal probe over self-driving claims
Where I live and with the kind of driving I do it actually feels safer because I get less tired on longer drives. This is long straight semi rural driving though. I don't use it on tight roads or in traffic. Be interesting to see the statistics on safety of lane assist and adaptive cruise control.
salty_biscuits··on Almost 25% of world’s seafloor now mapped
When they were doing the original scans the resolution was set by the diameter of the turbines, the logic being that they would probably be the only thing intact if it hit the water at speed.
salty_biscuits··on Making an ML Invisibility Cloak
Too be fair, so do a lot of human drivers. Something about motorbikes makes them difficult to perceive. Not sure if it is car pillar design, not expecting to see them there (a prior of just looking for cars) or just a small frontal area.
salty_biscuits··on Ask HN: How to Stop Caring (Professionally)?
My only advice if you can't stop seeing things as wrong is to broaden your perspective a little bit. Everything is wrong really and most people really do try their best given the circumstances. What seem like stupid decisions are usually just constraints that are poorly communicated.
salty_biscuits··on Watching 'Spirited Away' again, and again
A big thing with Japanese folk tales that is a bit of a jump for people with a European perspective is that they have no moral lesson. They are just a bunch of things that happen. It is fun to watch western audiences come up with theories about what these movies might represent, when they are just very Japanese. There are themes for sure and obvious messages about overconsumption and greed. But they are more about animism. For me the bit that sticks in my mind about spirited away is the part with the empty train going through the water and it just feels so lonely. I can't describe it very well, but I can't think of another depiction of that feeling.
salty_biscuits··on Team led by Japanese researchers reveals best way to put crying baby to sleep
Carried both my kids like this. They loved it. So much more convenient than a pram, you have both your hands free so great for shopping etc.
salty_biscuits··on Some things I realized about AI while contemplating slide rule prices on eBay
I agree, it is an old man rant. It is funny the lack of insight people have in their own intellectual journey. When you are a neophyte, of course all the old guard have all this intuition that you admine. Then when you are experienced every one around you doesn't seem like they know what they are doing. It's because you got better you clod, not that they got worse. Those people you admired when you were inexperienced wondered the same things about you when you didn't know what you were doing.
salty_biscuits··on Korean nuclear fusion reactor achieves 100M°C for 30 seconds
I worked for years in a business providing support services for maintaining the distribution network to rural areas. The distribution network was run at a loss by the government. Please look at the numbers and stop reactively responding.
salty_biscuits··on Accelerate Python code by importing Taichi
Interestingly enough, Alan Turing is originator of the study of reaction diffusion equations in biology

https://www.semanticscholar.org/paper/The-chemical-basis-of-...

salty_biscuits··on Korean nuclear fusion reactor achieves 100M°C for 30 seconds
Then don't do it. Grids are expensive. Microgrids and storage seem like a winning plan.
salty_biscuits··on The case for language agnostic hiring
Aren't you kind of paying them to learn directly by doing language agnostic hiring? More that you can't expect them to be productive quickly, but that goes for any hire right?
salty_biscuits··on Associations of body mass index, fasting insulin and inflammation with mortality
He is only BMI = 24 though? What crazy redefinition of obese is going on there.
salty_biscuits··on Associations of body mass index, fasting insulin and inflammation with mortality
The usual argument is that the scaling of the power wrt height is wrong (people aren't spherical basically). I don't buy it though. So many people say they have a high BMI but "they just lift weights". If you aren't on PEDs it is very unlikely that you can be BMI > 30 with low body fat.
salty_biscuits··on Ask HN: How can I start a business to generate electricity?
> The economics of how power generation works. Power generation has massive economies of scale and single-person initiatives are unlikely to be able to compete.

The only "in" for a small player is remote/rural where the cost of distribution infrastructure dominates. Also dispatchable service to provide frequency stability seems to be a niche.

salty_biscuits··on Why do arrays start at 0?
I'm a mathematician too, and it doesn't make sense to me. It seems somewhat arbitrary depending on the application, i.e. I think it is a type problem. We use an Int to mean something special about array elements. I'd be happier with first() and last() methods really, I don't care for coming up with meanings based on implementation details.
salty_biscuits··on Why do arrays start at 0?
I'm not arguing that the natural numbers should start from one, rather that the usual path for developing the natural numbers starting with set theory is that zero is the size of a set with nothing in it. In maths they always talk about the first element in a vector, not the zeroth. It is a bad argument to point to mathematics for using zero based indices. It is not at all common to use zero based indexing there.
salty_biscuits··on Why do arrays start at 0?
Where 0 is the cardinality of the empty set, i.e. some empty collection. Not a convincing argument.
salty_biscuits··on Coping with Copilot
"our profession is in trouble"

Or the world will shudder at the Byzantine monters we can pump out day after day

salty_biscuits··on John Carmack's new AGI company, Keen Technologies, has raised a $20M round
But a submarine doing what a submarine does is a tautology. What people are really grasping at is can a machine be human? And pinning down what it means to be human seems very important to ruminate on. Can machines think? Cogito, ergo sum...
salty_biscuits··on JNumPy: Writing high-performance C extensions for Python in minutes
I only had a quick look, but I would guess the slicing is what makes it slower than you would expect. Julia copies on an array slice, but you can use the @view macro or do some loops with a preallocated array to make it faster.
salty_biscuits··on The Echidna Is Australia’s Most Delightfully Different Mammal
Haha, yes I thought so but my experience on hn is any humor gets misread so just felt like I needed to clarify in case anyone thought I was a monster who goes around punting monotremes.
salty_biscuits··on The Echidna Is Australia’s Most Delightfully Different Mammal
"Get a kick" = "enjoy", not a literal kick.
salty_biscuits··on AlphaFold won’t revolutionise drug discovery
"Sadly, if any insight for the "why's" was there after all, we don't have a method to extract it anyway."

This has been my central frustration with working in ML. People always expect a "why" to exist, and by why I mean a cogent narrative explanation to complex phenomena. Maybe there is no "why" like this for a bunch of physical phenomena, maybe it is just a bunch of low level intricate stuff interacting in complex ways. There might be an emergent model that you can get a useful predictive model for with an ML model, then people get mad because the prediction doesn't solve the real meta problem that they were expecting to solve via the sub problem (e.g. solve folding then get mad because folding itself turns out not to be super useful because we don't know which protein to target, solve image classification then get mad because that doesn't make it easy to make a self driving car, etc, etc). "More is different" is definitely an idea in physics that needs to propagate into other fields to temper our expectations.

salty_biscuits··on The Echidna Is Australia’s Most Delightfully Different Mammal
They are super cute and I always get a kick whenever I see one on a walk. No idea why they are named after "the mother of monsters", early Europeans must have been on another planet

https://en.m.wikipedia.org/wiki/Echidna_(mythology)

salty_biscuits··on MIT invents $4 solar desalination device
I think I need to be more long form because people are getting the wrong idea. Desalination from seawater is almost never required, brackish sources are more common. For this multistage flash distillation is the cheapest option, reverse osmosis next. Even then most people could recycle grey water rather than run desalination. A sand filter works for this. These types of gizmo based approaches just strike me as incredibly naive as to the underlying causes of problems with water supply. More than naive, patronising. People in poor countries aren't stupid.
salty_biscuits··on MIT invents $4 solar desalination device
This is a good point but a sad situation. Without a functional state there are many other problems as well.
salty_biscuits··on MIT invents $4 solar desalination device
This isn't high tech stuff. People all around the world know how to make clean water. It doesn't require specialised equipment or knowledge.

https://en.m.wikipedia.org/wiki/Slow_sand_filter

salty_biscuits··on MIT invents $4 solar desalination device
Fresh water cost $1 per cubic metre. The availability of fresh drinking water in some countries is a political problem not a technological one.
salty_biscuits··on A looming copper crunch and why recycling can’t fix it
Sure, depending on the application you can just redesign to larger gauge aluminium. Aluminium has useful mechanical properties that trump the lower conductivity (such as power lines,where thermal cycles can make copper brittle). You could argue that there is a silver shortage in a similar way as the article has argued a copper shortage...
salty_biscuits··on It’s time to leave the leap second in the past
I always heard that the main reason for the leap second was that the british didn't want the prime meridian moving away from Greenwich (i.e. it is a weird political thing).
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