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david-gpu commented on Is Universal Basic Income Effective? Not Really   city-journal.org/article/... · Posted by u/Bostonian
SilverElfin · 19 days ago
Ironically the happiest and healthiest retires do more than the bare minimum. Maybe it isn’t work but they’re staying productive (or busy?) in many ways. Not doing things is really destructive to the human psyche.
david-gpu · 19 days ago
Unproductive in economic terms. They not contribute significantly to the tax base compared to what they used to.

Painting in broad strokes, of course. I'm sure somebody somewhere is working harder than ever, but it is not the norm. Long walks in the park and meeting with friends doesn't contribute to the tax base.

david-gpu commented on Is Universal Basic Income Effective? Not Really   city-journal.org/article/... · Posted by u/Bostonian
Oceoss · 19 days ago
Incentives matter. Imo you are not productive if you are paid for doing nothing
david-gpu · 19 days ago
Agreed. Retirees, even early retirees, are very unproductive because they don't need to produce anything anymore to maintain their lifestyle.
david-gpu commented on Is the interstellar object 3I/ATLAS alien technology? [pdf]   lweb.cfa.harvard.edu/~loe... · Posted by u/jackbravo
timuckun · 20 days ago
Have ever seen anything bigger than a bread box travel at 10% of the speed of light?

Also your timeline presumes self replicating spaceships exist or could exist. Have you ever thought about what kind of spaceship could mine metals, smelt them, make glass, build a chip fab etc?

david-gpu · 20 days ago
> Have ever seen anything bigger than a bread box travel at 10% of the speed of light?

The sort of technological capabilities we have today would sound laughable to people a mere thousand years ago. Who knows what will be doable in a few million years, which is a blink in the grand scheme of the cosmos.

david-gpu commented on Perfecting anti-aliasing on signed distance functions   blog.pkh.me/p/44-perfecti... · Posted by u/ibobev
david-gpu · 20 days ago
This looks a lot like some line anti aliasing I had to hack together many years ago when a customer started complaining loudly about the lack of hardware support for it. I think I had something like a week to put together three different alternatives for them to pick from, and this was the winner. It looked the best by far.

Years later my boss was telling me how satisfied he was that he could throw any problem in my general direction and it would be gone in no time. There is nothing like the risk of losing his work permit to motivate a young guy to work himself down to a crisp, all for peanuts.

david-gpu commented on Why Exercise Is a Miracle Drug   derekthompson.org/p/the-s... · Posted by u/zdw
kccqzy · 22 days ago
Riding a bike lifts my mood certainly but it doesn't let me experience my neighborhood. I zoom past the neighborhood and at 15mph you can hardly experience it. You might have some vague ideas about architectural styles in the neighborhood but that's it. If the neighborhood has shops, you can't easily visit them without first parking the bike. You need to walk to really experience a neighborhood.
david-gpu · 22 days ago
Nothing is forcing you to ride at 15mph. Walking doesn't let you go very far in a reasonable amount of time, either, and I'm one of those 10K steps a day sort of people.
david-gpu commented on Why Exercise Is a Miracle Drug   derekthompson.org/p/the-s... · Posted by u/zdw
sharkweek · 22 days ago
I can directly tie my mood to how much exercise I’ve had in a given week. It’s also easy, given how busy life feels, to let the proverbial frog boil in water when it comes to this.

My partner often comments when I’ve been a little grumpier than usual by saying, “you should go on a bike ride.”

It really works wonders on the soul (and the more physical heart and lungs) getting out for a spin in the fresh air.

david-gpu · 22 days ago
There is something about riding a bike that lifts people's mood like nothing else. It's the closest thing to flying like a bird that most of us will ever see. It lets you experience your neighborhood in a different light.
david-gpu commented on Tour de France confronts a new threat: Are cyclists using tiny motors?   washingtonpost.com/world/... · Posted by u/bookofjoe
cvwright · a month ago
But like Jorgenson said this year, there’s no tactics that can beat Pogi going up a steep hill at 7w/kg. At some point it all comes down to power to weight.
david-gpu · a month ago
Did tactics have anything to do with how Pogi lost the 2022 TdF on stage 11?

More generally, there is a lot more to each stage and to the race as a whole than the general classification.

If power to weight is all we cared about, we could rank all riders based on their power curve as measured on an indoor trainer and call it a day.

david-gpu commented on Tour de France confronts a new threat: Are cyclists using tiny motors?   washingtonpost.com/world/... · Posted by u/bookofjoe
brrrrrm · a month ago
> endurance sport which is a natural target for doping

This makes a lot of sense to me. A very singular goal of "maximum output" without much need for fine motor skills and strategizing. I'd guess sprinting/marathons might have similar issues?

david-gpu · a month ago
There is actually a lot of strategy in road cycling. Remember for one thing that there are teams -- ask yourself why is that.
david-gpu commented on Coronary artery calcium testing can reveal plaque in arteries, but is underused   nytimes.com/2025/07/26/he... · Posted by u/brandonb
jrvarela56 · a month ago
I don’t understand why some prople claim that diet does not impact cholesterol. I did ‘keto’ with bacon/steak/chicken/etc for 3 months, got bloodwork done before and after and my LDL went through the roof.
david-gpu · a month ago
Years ago I also experienced very high LDL after a few months of low carb. A doctor was convinced it was genetic (familial hypercholesterolemia) even though multiple earlier tests over the years had been in the normal range. He had never heard of low carb cholesterol hyper responders and dismissed that diet could have to do with it.

Nowadays I am convinced that what happened was completely explainable by the Lipid Energy Model [0]. Five days a week I was doing 60~90 minutes of cardio in the morning after skipping breakfast. Exercising in a fasted state while on a low carb diet meant that I had very low glycogen in my muscles and liver, which meant that the muscles had to mobilize fat as an alternative source of energy. Since fat is not water soluble, transporting fat through the blood stream requires packaging it inside a micelle wrapped in phospholipids -- a lipoprotein. Hence the elevated LDL & apoB.

The solution is simple: consume some carbs before and/or during exercise, and learn about the translocation of GLUT4 receptors if you are concerned about hyperinsulinemia.

[0] https://pmc.ncbi.nlm.nih.gov/articles/PMC9147253/

david-gpu commented on Never write your own date parsing library   zachleat.com/web/adventur... · Posted by u/ulrischa
quelsolaar · a month ago
When ever i see "never implement your own...", i know i want to implement it myself. People say that about hard things, and I only want to do hard things. Nobody wants people who can do easy things, people want people who can do hard things. The only way to learn how to do hard things, is to do hard things, so do the hardest things.

So go ahead, write your own date library, your own Unicode font rendering, compiler, OS, game engine or what ever else people tell you to never do because its hard.

david-gpu · a month ago
Software companies make money by providing value to their customers via the software they provide. How does reimplementing a hard but already well-solved problem align with their goals? How does that compare with solving a hard problem for which there are no good solutions yet?

u/david-gpu

KarmaCake day4828August 27, 2016
About
I was expected to know something about GPUs back when I worked as at NVidia, Qualcomm, AMD and Imagination Technologies, in reverse chronological order. I was a driver developer for the first half of my career and an architect for the second half.

I retired a few years ago to focus on other things in life.

https://ca.linkedin.com/in/david-gpu

----

Wishing you could block some HN users? (Perhaps me!)

Try Martin Tournoij's script: https://gist.github.com/arp242/3159b9cbbbe148c786e1ca10adaaea61

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