Hacker News: frazar0

New comment by frazar0 in "Reclaim Your Data: Freeing a Wi-Fi Sensor from the Cloud"

frazar0 — Wed, 18 Dec 2024 12:14:30 +0000

> If the device was validating the server certificate, it wouldn’t make it this far, so that shows that our certificate was accepted.

One more very good reason for preventing requests to "the cloud".

However, I find it funny that the lack of proper certificate validation (which is a security issue in principle) is a pre-requisite for the "de-cloudification" process.

New comment by frazar0 in "Show HN: I built a(nother) house optimized for LAN parties"

frazar0 — Sun, 17 Nov 2024 07:57:26 +0000

> RGB: None

I chuckled.

New comment by frazar0 in "The Visualization of Differential Forms (2021)"

frazar0 — Mon, 23 Sep 2024 02:58:36 +0000

Web Archive link: https://web.archive.org/web/20240921132410/https://web.tecni...

New comment by frazar0 in "Show HN: Open-Source Software for Designing 3D-Printable Luneburg Lenses for RF"

frazar0 — Mon, 02 Sep 2024 16:53:27 +0000

Very interesting!

It would be even more appealing if you could show a test case where a high level metric (e.g., wifi download speed) improves with one of your lenses compared to a baseline scenario without lense.

Also, I expect the dielectric properties of the printing material will affect the design.

Which printing material have you tested exactly?

Do you know how much the performance changes when cheaper alternatives is used?

New comment by frazar0 in "3rd Edition of Programming: Principles and Practice Using C++ by Stroustrup"

frazar0 — Fri, 19 Apr 2024 23:50:27 +0000

Might be Morse code

New comment by frazar0 in "Byte Fanless Mini PC – Built for Linux"

frazar0 — Mon, 17 Jul 2023 21:33:52 +0000

> Fanless 0 dB design

Note that 0 in dB scale indicates a 1:1 ratio with something, and not a zero in linear scale. Indeed, a zero in linear scale corresponds to -infinity in dB scale.

New comment by frazar0 in "Fairphone 4 is coming to the US"

frazar0 — Sun, 09 Jul 2023 11:34:29 +0000

Fairphone 4 has been my main and only phone for several months now. Great experience, very good battary life. Performance-wise, I haven't noticed any significant difference compared to traditional phones. The only drawbacks might be the camera and thickness, but honestly I don't care much.

Of course, much depends on your use case and expectations. YMMV.

New comment by frazar0 in "Porsche’s e-fuel burns just like the real thing"

frazar0 — Sat, 01 Apr 2023 22:12:24 +0000

https://web.archive.org/web/20230401205313/https://www.wired...

New comment by frazar0 in "Ultrathin Metasurface Displays Take Aim at the LCD"

frazar0 — Tue, 14 Mar 2023 13:20:55 +0000

Don't know much about the invisibility cloak. But in wireless communications the "better smart mirror" idea is being investigated to achieve arbitrary reflection directions that defy Snell's law [1][2]. The objective is to hang these "mirrors" on walls/buildings and reflect the incident power towards areas where the reception is poor.

[1] https://arxiv.org/abs/2110.09183

[2] https://ieeexplore.ieee.org/document/9718037

New comment by frazar0 in "Image Compression with Singular Value Decomposition"

frazar0 — Thu, 09 Feb 2023 23:08:32 +0000

One issue with SVD is its significant time complexity compared to, for example, the Discrete Cosine Transform used in JPEG

New comment by frazar0 in "Rust maintainer perfectionism, or, the tragedy of Alacritty (2020)"

frazar0 — Fri, 26 Nov 2021 12:52:13 +0000

The author raises an interesting argument, but I don't see how the "maintainer perfectionism" issue is specific to Rust in particular.

Indeed, the two examples they mention are both related to Rust somehow, but is it enough to generalize to the whole Rust ecosystem?

New comment by frazar0 in "Vanishing zeroes for geometric algebra in Rust"

frazar0 — Mon, 07 Dec 2020 06:52:33 +0000

An alternative could be to create another zero-sized type for NaN and Infinity

New comment by frazar0 in "SpaceX’s Starlink Constellation construction begins"

frazar0 — Wed, 17 Apr 2019 06:10:59 +0000

Interesting point. However, I believe frequency trading relies on connections with extremely low latency, while satellite links are characterized by high Round Trip Time.

New comment by frazar0 in "Show HN: FarmNet, an open-source LoRA agricultural sensing/actuation network"

frazar0 — Sat, 12 Jan 2019 00:46:49 +0000

If you're looking for something Arduino-compatible, you should consider the RFM9x family of boards, based on the SX1276 LoRa chips.

Breakout board from Adafruit: https://www.adafruit.com/product/3072

New comment by frazar0 in "Meltdown and Spectre Linux kernel status"

frazar0 — Sat, 06 Jan 2018 17:05:33 +0000

A number of ways are listed here [1]

1. With dmesg

dmesg -wH | grep 'page tables isolation'

2. With /proc/cpuinfo

grep cpu_insecure /proc/cpuinfo && echo "Patched" || echo "Unpatched!"

[1] https://askubuntu.com/questions/992137/how-to-check-that-kpt...

New comment by frazar0 in "Enabling Rust on Embedded Platforms – Linux, RTOS, Bare Metal"

frazar0 — Mon, 16 Oct 2017 16:35:56 +0000

Yes.

The issue is actually being worked on. For example, the draft RFC for fallible collection allocations is now in final comment period [0].

Edit: fix link

[0] https://github.com/rust-lang/rfcs/pull/2116