Hacker News: JMKH42

New comment by JMKH42 in "Analysis points to a unexpected cause of reading difficulties"

JMKH42 — Tue, 12 May 2026 15:51:38 +0000

In my mid forties now reading without good reading glasses is absolutely awful, I could see some people struggling with enjoyment of reading if they weren't aware their eyesight is an issue.

Something to check if you are getting older and not enjoying reading as much lately!

New comment by JMKH42 in "Analysis points to a unexpected cause of reading difficulties"

JMKH42 — Tue, 12 May 2026 15:45:06 +0000

The article is strange, as it starts with "we used to think it was just that smart kids read well, but this new study etc etc"

But the details of the new study seem to support exactly that original idea.

Perhaps a little more detail on why and what kinds of smart, but it was a pretty broad set of mental skills that mattered

New comment by JMKH42 in "Higher usage limits for Claude and a compute deal with SpaceX"

JMKH42 — Wed, 06 May 2026 17:10:33 +0000

I don't think space compute is going to work out, but I would certainly say "yes happy to buy space compute from you in the future if you offer it at a good price"

If it happens it happens, if not, it doesn't.

New comment by JMKH42 in "CATL's new LFP battery can charge from 10 to 98% in less than 7 minutes"

JMKH42 — Wed, 22 Apr 2026 14:24:08 +0000

Understanding battery degredation takes a lot of nuance. If you do nothing but charge and discharge quickly at some given temperature, you degrade to 90% in 1,000 cycles.

But the battery also degrades over time, the hotter it is the more, the higher the SOC the more. So you have to add on that calendar degradation, to that 10% loss from just charging.

Total degradation in practice will vary a lot, based on users charging and storage practices. Most of the time in practice it seems some fault will brick a battery before it degrades too much in total capacity.

New comment by JMKH42 in "As oceans warm, great white sharks are overheating"

JMKH42 — Tue, 21 Apr 2026 15:44:44 +0000

and likely other un predictable knock on effects would reduce the benefit, like going vegan would mean more food is available overall, and population might rise in response.

New comment by JMKH42 in "Union types in C# 15"

JMKH42 — Wed, 08 Apr 2026 13:48:20 +0000

type providers, units of measure, active patterns, complete type inference.

Not sure I would want the last thing in C#, I think having boundaries at the function signature for that.

New comment by JMKH42 in "Warren Buffett dumps $1.7B of Amazon stock"

JMKH42 — Wed, 18 Feb 2026 19:48:57 +0000

The purchasing experience when you buy direct from companies now is usually much easier than it was years ago. A lot of people instinctively turn to Amazon because its one click and stuff is on its way, but with the new payment integrations even small companies have a pretty close to 1 click experience as well. So when I think of buying something on Amazon I always check the actual brands website first now, because I don't want to support Amazon at all or force sellers to eat the overhead.

New comment by JMKH42 in "AI adoption and Solow's productivity paradox"

JMKH42 — Wed, 18 Feb 2026 15:12:10 +0000

>And so we should expect AI to look the same -

Maybe! Or it might never pan out, or it may pan out way better. Complicated things like this rarely turn out the way people expect, no matter how smart.

New comment by JMKH42 in "Scientists research man missing 90% of his brain who leads a normal life (2016)"

JMKH42 — Wed, 11 Feb 2026 17:44:18 +0000

Is 90% of his brain actually missing or is the volume reduced by 90%? I.E. are the mass and connections still mostly there but just squished by extra fluid?

From what I can tell googling about this, it seems it is mostly just squished, so volume is down 90% but mass or neuron count is not missing 90%

New comment by JMKH42 in "Semaglutide improves knee osteoarthritis independant of weight loss"

JMKH42 — Tue, 10 Feb 2026 18:43:19 +0000

I have a bad disc, and while its still bad, a couple weeks of freestyle swimming workouts makes it not hurt for a year or two and lets me mountain bike comfortably again. Something to try if the usual stuff doesn't work, as it tends not to!

This was the disc between lumbar and sacrum. 1,000 ways to have a bad disc so results will vary a lot!