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jval43

1,911 karma · joined January 20, 2016

No AI used in my comments. Software engineer by day. I’m subscribed to hnreplies.com (no affiliation), so I’ll get an email if you reply to one of my comments.
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jval43··on Passport Photos
A screenshot or example would help. Interesting idea.
jval43··on The motor turns too much
EVs (and hybrids) solve that problem so elegantly.

They have so much torque at a standstill that hill assist is a given and going up or down a hill slowly forwards or reverse is not an issue. Absolute gamechanger.

Not sure what you mean by standard transmission, but in a manual you'd also have to use the parking brake while using the clutch to go up in reverse. Otherwise the motor would stall, or you'd roll forwards.

jval43··on The motor turns too much
On a manual it's the opposite. Put it in 1st gear, let it settle into place, only then parking brake.

1st will hold the car by itself if the parking brake slips.

jval43··on Solid-state batteries enter pilot production, costs expected to drastically drop
It's not much of an article. This one was much better, with more specifics: https://news.ycombinator.com/item?id=41979906
jval43··on Why those particular integer multiplies?
You're right, it's been a while since I dabbled in SIMD.
jval43··on Why those particular integer multiplies?
Another issue with lots of older processors is that they would slow down clock speed when using SIMD instructions so much that there was effectively no performance gain. You had to be very careful which instructions you could actually use.
jval43··on Low Cost CO2 Sensors Comparison: Photo-Acoustic vs. NDIR
It's crazy how optimized the Aranet 4 Home is. It runs on AA batteries for a whole year, no need to plug it in.

That's unique in the space, and a case where e-ink makes a real difference. And very convenient in practice.

jval43··on ReMarkable Paper Pro
I'm done with ReMarkable, the company. I have the original reMarkable and was enthusiastic at first, but it's been downhill since.

It's clear the company is now run mostly by marketing and business people. At some point they didn't do any software development at all, and soon after they actually removed features. None of the original hacker spirit has remained.

Most of your money is going to marketing. The device and software are insanely overpriced, and I see their ads everywhere.

Never buying any of their devices again.

jval43··on Iron as an inexpensive storage medium for hydrogen
Actual publication linked is very readable: https://pubs.rsc.org/en/content/articlelanding/2024/se/d3se0...
jval43··on Is my vision that bad? No, it's just a bug in Apple's Calculator
Funnily enough a simple fgrep is super fast on SSDs and actually reliable. Even across TBs of data.

With Spotlight you can never be sure. And to be fair, the Windows equivalent sucks just as much.

jval43··on Is my vision that bad? No, it's just a bug in Apple's Calculator
Notes has been super buggy for a while. The failure modes are so weird I don't even understand how it's possible for a text editor. E.g. text and selections rendered floating between or on top of lines of text. I wonder how they manage to bork it so hard.
jval43··on Canon R5 Mk Ii Drops Pixel Shift High Res – Is Canon Missing the AI Big Picture?
Canon doesn't do it better. I tried the R5 mode a few times when it came out and it's complete garbage. More like something an intern did as a proof of concept than an actual well implemented feature. The stitching could be done a lot better, but it isn't. Purely a marketing gimmick.

The new R5 Mk II AI upscale is the same, a gimmick that got way to much attention by the press solely for using the word AI.

Canon does use AI features in their R5 AF tracking, and it's really impressive. But Canon calls those features deep learning or other more specific terms.

jval43··on SurrealEngine: Open-source reimplementation of Unreal Engine with playable UT99
Any recommendations for the genre? Most games are just way too slow nowadays.
jval43··on A different kind of keyboard (2021)
I honestly love the part about how the author did the key layout.

No hiding behind statistics or any sort of structured process, just doing what feels right, avoiding what feels wrong and iterating.

jval43··on You've got to hide your myopia away: John Lennon's contact lenses
For younger people they leave the bodies own lenses in, so there's no restrictions on focusing.

Downside is that there is an additional risk of glaucoma if the bodies lenses interact with the ICLs.

jval43··on You've got to hide your myopia away: John Lennon's contact lenses
>halos at night

I have ICLs and suffered from those too, along with other internal reflections at night. It will get better with age as your pupils get smaller, but it takes years.

As for ICLs don't be fooled by the marketing too much. I've read countless medical studies since having them and I'm reading about all sorts of increases in risks for eye issues. Btw dry eyes are a possibility too, as with any cut into the eye. Long-term studies are rare too, as 5 or 10 years is already considered long. I expect to live a lot longer than that.

Not to mention that while "reversible" is true, the procedure is not as easy as putting them in and you really don't want to take them out it unless you absolutely have to. It's a rather substantial cut they have to make to take the unfolded ICL out again.

jval43··on Do Skis Get Blunt?
Now that you mention it I suspect this may be a big reason some people have had different experiences.

I also started with long straight skis and they are a lot less forgiving than the carving skis that followed. Nowadays I see a lot more freestyle skis which are again a different thing, but I don't have much experience with those. So maybe that's where people are coming from.

I'll admit the discussion has gotten a lot better by now, I guess I was just too early.

jval43··on Do Skis Get Blunt?
The article is fine, it's the discussion that is maddening here. Sometimes HN is just too much.

This would have been great n-gate bait. Too bad that site isn't updated anymore.

jval43··on Do Skis Get Blunt?
It doesn't just affect performance, blunt edges make skiing down icy patches impossible. The effect is so pronounced that if you do enough skiing in a day you'll notice a difference even at the end of that day.

The effect of a newly sharpened ski is noticeable immediately even if you're an absolute beginner. Even moreso if you're on a snowboard.

Source: 30 years of skiing and snowboarding.

jval43··on Shipt’s algorithm squeezed gig workers, who fought back
Looks like nothing happened after:

> They asked for a meeting with Shipt executives, but they never got a direct response from the company. Its statements to the media were maddeningly vague, saying only that the new payment algorithm compensated workers based on the effort required for a job, and implying that workers had the upper hand because they could "choose whether or not they want to accept an order."

> Did the protests and news coverage have an effect on worker conditions? We don’t know, and that’s disheartening.

jval43··on You'll regret using natural keys
It's never a single database in the real world. As soon as you integrate something or have an API to something the keys are out there. Unless you add a translation layer, but then you could just as well use surrogate keys directly.
jval43··on Phone cameras can take in more light than the human eye
Try birding at 500mm or more. Pixel soup (pun intended) vs crisp details from the R5 with 100-500, even at f7.1 or higher. No comparison.

Even at 105mm f4 the difference is night and day. Portrait mode is good enough for casual use, but the real thing still looks better.

jval43··on Daylight Computer – New 60fps e-paper tablet
A 2000 nits bright iPhone is perfectly usable outside in bright sunlight.

The brightest iPad (iPad Pro) is currently 1000 nits. Not quite there yet, but I'm sure the next generations will only improve.

jval43··on Why you can hear the temperature of water
Petrichor: https://en.wikipedia.org/wiki/Petrichor
jval43··on Fear makes you a worse programmer (2014)
You don't need 99% coverage. You just need enough coverage to be able to refactor the thing without breaking it.
jval43··on New vuln in Apple M-series allowing secret keys extraction can't be patched
"Remote Timing Attacks Are Practical" (2003):

https://crypto.stanford.edu/~dabo/papers/ssl-timing.pdf

That's on the local network. I remember a paper doing this over the internet, but couldn't find it. A similar one over the internet:

https://www.usenix.org/conference/usenixsecurity20/presentat...

But in practice it's going to be malicious JS running in your browser: https://www.schneier.com/blog/archives/2021/03/exploiting-sp...

jval43··on CEO of data privacy company Onerep.com founded dozens of people-search firms
rent the cure. FTFY.
jval43··on European crash tester says carmakers must bring back physical controls
I was in the market for a car, and initially really wanted a Tesla or VW / ID, but with no buttons, no dials, and on the Tesla additionally no parking sensors, wonky rain sensors combined with missing stalks and no straight-on speedometer, it quickly became clear to me these were all potential usability and safety issues.

I found a nice Toyota instead with a button for every function, and everything just works.

jval43··on Notes from an Interviewer
That's funny. I wrote SQL daily for 10 years, read the ISO standards when working on SQL transpilers, persistence frameworks for multiple databases, etc. Even wrote a new storage engine for MySQL once.

But I just had to look up what the acronym stands for! Apparently it's "structured".

jval43··on Data will not tell you what to do
OT: there's actually a ≔ symbol, so you could write MLE ≔ DS if you wanted to.
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