Hacker News: dancsi

New comment by dancsi in "What's that touchscreen in my room?"

dancsi — Sun, 21 Jan 2024 13:11:46 +0000

Actually, it is just serial under the hood, although electrically slightly nonstandard.

New comment by dancsi in "Ultrasonic Payments"

dancsi — Wed, 08 Jun 2022 07:28:05 +0000

This reminds me of how the student meal subsidies are implemented in Slovenia, and in my opinion it was quite unwieldy. You call a phone number and place your phone's earpiece on another device with a microphone. Then, some personal data is transmitted using (ultra?)sound. I remember it being quite unreliable, but that might be down to using the telephone network as the data carrier.

New comment by dancsi in "My Mathematics PhD research workflow: LaTeX notes and instant pdf referencing"

dancsi — Sun, 10 Apr 2022 21:28:22 +0000

I guess it will be easier to get it working with Zotero, as it's open source, and I think it even supports custom plug-ins.

New comment by dancsi in "You may not need Cloudflare Tunnel. Linux is fine"

dancsi — Fri, 08 Apr 2022 08:16:21 +0000

This looks neat, but I don't really understand how it works. I imagine that the DNS record is pointed towards the VPS, and the VPS just forwards all traffic to the actual server via wireguard?

New comment by dancsi in "Implementing Cosine in C from Scratch (2020)"

dancsi — Tue, 29 Mar 2022 17:36:03 +0000

The implementation of the __cos kernel in Musl is actually quite elegant. After reducing the input to the range [-pi/4, pi/4], it just applies the best degree-14 polynomial for approximating the cosine on this interval. It turns out that this suffices for having an error that is less than the machine precision. The coefficients of this polynomial can be computed with the Remez algorithm, but even truncating the Chebyshev expansion is going to yield much better results than any of the methods proposed by the author.

New comment by dancsi in "Improving Git protocol security on GitHub"

dancsi — Wed, 01 Sep 2021 20:41:26 +0000

Now they have added it for host keys.

New comment by dancsi in "Reverse Engineering an Unknown Microcontroller"

dancsi — Wed, 12 May 2021 11:08:30 +0000

Brought to you by the legend who managed to run Linux on an 8-bit microcontroller: http://dmitry.gr/?r=05.Projects&proj=07.%20Linux%20on%208bit

New comment by dancsi in "2018 Mac Mini Review"

dancsi — Tue, 06 Nov 2018 12:27:20 +0000

Have you tried Kodi (kodi.tv)?

New comment by dancsi in "An invitation to category theory"

dancsi — Mon, 22 Oct 2018 09:10:26 +0000

It seems to me that you can select some of the largest EU countries by clicking the US flag in the top right corner.

New comment by dancsi in "Sublime Text 3.1 Released"

dancsi — Mon, 07 May 2018 11:35:14 +0000

Does somebody know which color scheme are they using in these screenshots?

New comment by dancsi in "Scientists Reverse Brain Damage in Drowned Toddler?"

dancsi — Thu, 20 Jul 2017 21:46:33 +0000

Maybe it is Slashdot?

New comment by dancsi in "The Calibre Content Server"

dancsi — Fri, 16 Jun 2017 12:55:16 +0000

It would be great if this feature was extended so that I can sync my books across different Calibre installations on different machines.

New comment by dancsi in "Taking the SCiO Food Analyzer Grocery Shopping"

dancsi — Thu, 23 Mar 2017 16:06:45 +0000

As for the last point, you are right, they are purposefully sending encrypted/encoded(?) data to your phone, which is then sent to their server. The raw spectrum will only be returned from the server if you have an even more expensive "researcher" account...

New comment by dancsi in "Avremu: An AVR Emulator Written in Pure LaTeX"

dancsi — Thu, 08 Dec 2016 09:30:13 +0000

The obvious next step is to emulate ARM within it, and use it to run Linux: http://dmitry.gr/index.php?r=05.Projects&proj=07.%20Linux%20...

New comment by dancsi in "KrebsOnSecurity is now up and hosted on Google Cloud"

dancsi — Sun, 25 Sep 2016 09:10:52 +0000

Akamai decided to stop hosting the site after a massive DDOS attack targeted at it

New comment by dancsi in "PyCNN: Cellular Neural Networks Image Processing Python Library"

dancsi — Sat, 20 Aug 2016 14:41:08 +0000

The name CNN is quite unfortunate, as it is most often used for convolutional neural networks.

New comment by dancsi in "Visual profiler for Python"

dancsi — Thu, 19 May 2016 18:34:56 +0000

Is it just me, or running programs under PTVS slows them down by quite a bit? Even when I turn off debugging, it still seems to be slower than when I run the program from the terminal.

New comment by dancsi in "Neural Networks in JavaScript"

dancsi — Mon, 09 May 2016 10:39:28 +0000

I would guess that it is very unsuitable, since for anything but the most trivial models, even those 'Python' libraries resort to highly-optimized (compiled) C subroutines, especially for the training part. Even then you require a highly nontrivial amount of time to train the network, especially if you are working with medium to large datasets.

Later on, when the speed is not so critical, you can do inference with those pretrained weights and your model implemented in Javascript.

New comment by dancsi in "Exploiting WPA2 in a City Wide Wi-Fi"

dancsi — Sun, 24 Apr 2016 18:40:44 +0000

I agree, handing out the same static "secret" key to millions of New Yorkers would make no sense at all.

New comment by dancsi in "LLVM 3.8 Release Notes"

dancsi — Tue, 08 Mar 2016 20:53:18 +0000

You can download a nice installer from here: http://llvm.org/releases/download.html