HNHacker News
TopNewBestAskShowJobs

mvanaltvorst

361 karma · joined February 12, 2019

mauritsvanaltvorst.com
submissionscomments
mvanaltvorst··on What's Inside the EU Green Pass QR Code?
Who is in control of the actual certificates? Is it a private company, or the government of some European country?
mvanaltvorst··on Towing a Tesla at 70 MPH replenishes battery at fast charger rates
Regen braking is noticeably less powerful when your battery is nearly full, and you have to manually use your friction brakes more. Sounds like it might be a safety issue, but in any scenario where you use regen brakes you have more than enough time to switch to physical brakes if you want to.
mvanaltvorst··on Next.js 11
Great to see reduced cumulative layout shift in image tags! Next.js seems to be the only modern JS framework with accessibility by default. Still wishing i18n would work with `next export`, though.
mvanaltvorst··on The global chip shortage is creating a new problem: More fake components
My guess would be the exact opposite: current chip shortage has lead to billions of USD more put into new fabs and R&D. I think/hope the market will overreact to this shortage, and I'm excited to see what we will be able to do with all those new faster ultra-low cost microcontrollers in 5-10 years.
mvanaltvorst··on Apple M1 support for TensorFlow 2.5 pluggable device API
Everything webdev works great, Docker is the only thing in my workflow that is still a bit of a hassle but that is quickly improving.
mvanaltvorst··on Google says Rowhammer attacks are gaining range as RAM is getting denser
Rowhammer does not really happen in real life scenarios, because if you access the same block of memory multiple times it usually gets cached in L1, L2 or L3 cache. You really have to try to induce such a magnetic field in RAM. The things you're referring to are probably from other sources of random bit flips, such as cosmic radiation.
mvanaltvorst··on Sandwell Bitcoin mine found stealing electricity
The police images show ASICs.
mvanaltvorst··on Ask HN: Did preparing for LeetCode type of interviews improve your skills?
I'm a bachelor student, but I trained for the international informatics olympiad in high school. These days, most of the programming I do is in web development where I do not need any of the relatively advanced algorithms I know. I do not think competitive programming has necessarily improved my web development skills, only that I write code faster. However, I do feel prepared in the sense that I would definitely recognise situations where dynamic programming/segment trees/sqrt decomposition would be of help. I thoroughly enjoyed getting the absolute most out of your CPU with C++. Sometimes I miss the obscure pointer arithmetic, bit twiddling with Fenwick trees, thinking of ways such that I can divide by const's instead of int's because the compiler can optimize those further. It's a special kind of feeling to solve problems by combining clever algorithms and pushing the hardware to what it is physically capable of.
mvanaltvorst··on USB-C is about to go from 100W to 240W, enough to power beefier laptops
50 volt @ 5 amps? Better make sure your ports don't have any lint inside. And don't forget your special EPR certified 240W USB-C cable, of course. The U in USB stands for "universal", but it feels like USB is trying to target a very niche market with this.
mvanaltvorst··on Why is the Gaza Strip blurry on Google Maps?
Tracking deforestation, melting of glaciers, basically anything geographic. If you're looking for things people profit from, you're right that some trading firms use satellite images to count cars in parking lots of e.g. Walmart to predict earnings reports. Similar things can be done on oil refineries for example (some satellites can even look /through/ oil tanks to look at oil levels by looking at specific wavelengths).
mvanaltvorst··on Scaleway announces measures against abusive Chia plotting and farming
You could. But someone else could add 8 SSD's for the same money and plot multiple times as fast as you, until the SSDs break.
mvanaltvorst··on Scaleway announces measures against abusive Chia plotting and farming
You need a relatively large amount of storage space for plotting, more than most RAM disks. It has proven to be more cost effective to consume SSD's than to use slower HDD's or a RAM disk.
mvanaltvorst··on The Tether Ponzi Scheme
Yes. However, if you and the rest of the world want to at the same time, you cannot. This is a known risk, normal banks suffer from the same problem. However, normal banks are strictly regulated, and will receive a bailout to make sure your life savings do not vanish in thin air. Tether does not have such guarantees, so you will have to solely trust Tether foundation to prioritise your money over their profit.
mvanaltvorst··on Why is the Gaza Strip blurry on Google Maps?
planet.com can get you a ~12 images per day [1] for a reasonable price. If cost really isn't an issue, I'm confident you could strike a deal with planet.com to place their next few new satellites into the specific orbit you want to up the frequency even more.

[1]: https://www.planet.com/pulse/12x-rapid-revisit-announcement/, as of June 2020.

mvanaltvorst··on Apple Music Announces Spatial Audio and Lossless Audio
(AirPods Pro | AirPods Max) + (Mac | iPad | iPhone) or Apple TV + HDMI. I don't think the Apple Watch + AirPods are supported unfortunately, might be due to battery/performance reasons.
mvanaltvorst··on Vulnerability allows cross-browser tracking in Chrome, Firefox, Safari, and Tor
Was silent for me on macOS Big Sur Safari as well, except for the fact that it opened Apple Music without any warning. The author might want to remove the iTunes check, not sure how much entropy it adds anyways given that it is automatically installed on all Macs.
mvanaltvorst··on Emulating AirTags to upload arbitrary data via Apple's FindMy network
Does this fall within Apple's policy of fair use? Would be great if there were an officially supported (paid) API for this, the technology and potential use cases are great. I'm afraid hooking something like this up to my Apple ID will get me banned somehow.
mvanaltvorst··on I mailed an AirTag and tracked its progress
<100$ GPS car trackers that use cellular and are arguably better for tracking cars already exist.
mvanaltvorst··on Multitasking hurts performance and may even damage the brain (2018)
I wonder if brain structures of children are getting wired differently to better accommodate for multitasking in the modern Information Age. I would imagine that if you multitask all day, your brain would adapt to do this context switching more effortlessly, probably at the cost of something else that the brain judges as less important. Not saying that that's a bad thing, I'm just curious.
mvanaltvorst··on Hosting SQLite databases on GitHub Pages or any static file hoster
That's part of SQLite. It has been optimised to reduce disk reads, because those can be slow on spinning hard drives. Coincidentally, this translates well into an optimised algorithm that minimises the amount of HTTP range requests to make.
mvanaltvorst··on Hosting SQLite databases on GitHub Pages or any static file hoster
I'm curious, in what manner could this method speed up Next.js builds? That's all done locally, which negates the effect of HTTP range requests, right?
mvanaltvorst··on What can mRNA treat next?
What kind of proteins are important when you're looking at the immune system? Is there a protein that can attach to thyroid gland cells and signals to the body that it isn't a threat? Or is there some sort of memory of the immune system with non-threat cells, that mRNA could overwrite? I'm not a biologist, I'd love to read more about these specific inner workings without dissecting a whole undergraduate biology book.
mvanaltvorst··on What can mRNA treat next?
Are there any online resources where I could learn more about what mRNA treatments could theoretically cure? Take Hashimoto's disease for example, a disease where your thyroid gland slowly gets destroyed by your immune system. If I understand correctly, mRNA could stop your thyroid gland from getting destroyed in the first place, but it cannot regenerate the thyroid gland if it has already been destroyed. Is that correct?
mvanaltvorst··on The compiler will optimize that away
“Programming languages are old, therefore they will never take advantage of our hardware.” Have you looked at how compilers have changed the past 30 years? How they take advantage of SIMD? AVX? The LLVM-revolution? It’s delusional to think compilers will never be smart enough to vectorise object-oriented code, which is the main gripe of this article.
mvanaltvorst··on The Gates to Hell: Apple’s Notarizing
Cheap considering what? Considering the 30% margins they take on any further sale? Considering the 25$ one-time fee the Play Store takes?
mvanaltvorst··on Who won the Amstel Gold Race? Human error in photo-finishes
I think you misunderstood how a photo finish camera works. Please try re-watching the explanation video. The photo isn't a snapshot of the race at a specific time, the photo shows an entire interval where the top cyclers passed the finish line. It's like having long shutter time and a narrow slit and slowly moving the camera such that you get the view of the slit projected along the entire camera sensor.
mvanaltvorst··on Ask HN: Please Dark Mode for HN
```

@media (prefers-color-scheme: dark) {

    * {

        color: #ccc;

        background: black;

    }
}

```

Really all you need for a rudimentary dark mode that automatically changes depending on your system preferences. Let's stop pretending this would take HN more than 30 minutes of dev time. Definitely would help improve accessibility.

mvanaltvorst··on Chia surpasses 1 exabyte of hard drive space
There's two parts to Chia: plotting and farming. Plotting is a one-time cost of ~5-10 hours for a SSD, and after that you can start farming and you continuously earn Chia by proving your drive still contains the random data that got initialised during plotting. Erasing the drive would mean you have to start over and you lose ~10hrs of income.
mvanaltvorst··on Who won the Amstel Gold Race? Human error in photo-finishes
The fact that the gap between the blue and green lines is increasing over time confirms your hypothesis.
mvanaltvorst··on Who won the Amstel Gold Race? Human error in photo-finishes
You're right, the camera was in front of the actual finish line.

My point is that Wout was ahead for the /entire/ duration where the front wheel intersected the camera line. The wheel's diameter is bigger than 20cm, so the moment when Wout passed the actual finish line is included in this interval. Therefore, Wout was ahead when the winner passed the actual finish line. QED.

← PreviousPage 2 of 4Next →