erdewit

Isn't this what's used for military applications like AESA radars? If so how come it's open source?

> If I had a pair of decent speakers and a microphone hooked up to my PC, how would I go about "tuning" the speakers?

Blatant plug: https://github.com/erdewit/HiFiScan

How the Germans during their Afrika campaign discovered this bacterium to treat dysentery, which was killing more soldiers then the British troops did.

Elemental iodine in solution with iodide forms tri-iodide, which is perfectly fine to consume. This is what Lugol's solution is and it has an unlimited shelf life.

I use root to force a 44.1 kHz sample rate for the audio to avoid resampling of my lossless music, which is all in 44.1 kHz. The difference is noticeable even over Bluetooth with aptx(HD).

For Linux the list is here: https://git.kernel.org/pub/scm/linux/kernel/git/sforshee/wir...

It also shows the maximum power (in mW or dB) for the channels, which is also key to get a good reception. The dB notation is for example (20), which corresponds to 100 mW. Every 3 dB is a factor 2 in power, so (23) is 200 mW.

> Does this work in encoded videos?

For older encodings such as MPEG2, as used in DVDs, it does work. For newer codecs with higher compression I can't extract a heartbeat signal anymore when using the tool that I've written for that (*).

(*) https://github.com/erdewit/heartwave

> because a phase-neutral response created in a room is only valid in one point of the room

Author here. The term "phase-neutral" simply means here that the impulse response is symmetrical and doesn't add a phase shift. It doesn't even try to neutralize the phase characteristics of the room, which is what you may be thinking. In fact the phase information from the measurement is completely discarded. Furthermore, the frequency response is averaged to get a more general and robust (less over-fitted) correction that works pretty well across the room. Try it...

This is dealt with by smoothing the spectrum in a way to preserves the power density. The constructive and destructive interference then cancel each other out.

My router uses 8 Watt from the mains, regardless of how much traffic it's handling. It also has an ECO mode that doesn't actually lower the power consumption.

When playing FLAC music over aptX HD, the next step for improvement is to avoid any resampling. The music is generally at 44.1 kHz and the default for Android is 48 kHz. It requires root to change the audio config file to 44100, and it's also necessary to change the bluetooth settings (in the developer options).

Something similar goes for Linux.

The resampling shouldn't matter much in theory, but in practice it's pretty noticeable. It seems to be optimized for CPU usage instead of audio quality.

For example, the entire entry for "mass formation" was deleted. The Dutch version still exists:

https://nl.wikipedia.org/wiki/Massavorming

The first 16 GB will still be dual-channel, only the remainder will be single-channel (flex mode).

What makes Bitcoin a commodity is that nobody can issue more Bitcoin, other then from mining, just like with physical commodities. The market can still be manipulated by the big players but that is besides the point. When more of an asset can be issued (created from thin air) then it is a security.

Is the TaskGroup really in the 3.11 release though? It's not to be found anywhere in the Python documentation or release notes: https://docs.python.org/3.11/whatsnew/3.11.html

It has been talked about for a long time, probably 4 years now.

On the photo of the Moskva I can't really see a missile impact.

It's that the array access of numpy is surprisingly slow compared to a Python list:

  lst = [0]
  %timeit lst[0] = 1
  33.9 ns ± 0.0415 ns per loop (mean ± std. dev. of 7 runs, 10000000 loops each)
  
  arr = np.empty(1, dtype=int)  
  %timeit arr[0] = 1
  73.4 ns ± 0.306 ns per loop (mean ± std. dev. of 7 runs, 10000000 loops each)

With that much LED light I would be concerned about the high blue peak around 450 nm, it's damaging the retina.

https://www.ncbi.nlm.nih.gov/labs/pmc/articles/PMC5313540/

https://duckduckgo.com/?q=white+led+spectrum&atb=v310-1&iax=...

Another great option is to mount the remote file system with SSHFS.

Other lossy compression methods generally happen in the frequency domain and, depending on the type of music, can introduce audible distortions.

This preprocessor on the other hand throws away some of least significant bits to save data. This increases the quantization noise but has no other sort of artifacts. The quantization noise can be dithered to fall in the higher frequencies (noise shaping) and is generally not perceptible.

Here in the Netherlands there's also a sharp increase in the excess mortality that can't be explained by COVID deaths.

https://www.rivm.nl/monitoring-sterftecijfers-nederland

Aptx is actually pretty good, certainly for ear pods. It's a time-domain codec which is great for acoustical instruments (the frequency-domain codecs can fail there, AAC too).

The signal-to-noise ratio is lower than CD quality but still good enough so that noise is not audible:

http://soundexpert.org/articles/-/blogs/audio-quality-of-blu...

A key feature of Kodi for me is that it syncs the TV frame rate to the video that is playing. I don't know any other players on Linux that do that.

The mycologist Paul Stamets wears a hat made of this leather. He has to be careful around fire because of the flammability, it's made from tinder fungus after all.

In the same vein that heavier-than-air flying machines are impossible.

> What a vaccine does - it primes one's immune system, so it fight the virus way more efficient.

My understanding is that it does not really fight the virus (viral load stays the same), but that it does prime the immune system so as not react too violently. In other words it prevents a cytokine storm:

https://en.wikipedia.org/wiki/Cytokine_storm

It's still a good proof that the smaller pizza's have more crust.

> Are you trusting science to be a pure discipline, motivated only by the search of the truth?

A distinction can be made between science on the one hand and scientists on the other.

Could it have been ancient aliens ?!!!?....

> That’s called cruise missiles

There's also the class of "Loitering munition", which was used to great effect in the 2020 Nagorno-Karabakh war.

https://www.brookings.edu/techstream/loitering-munitions-pre...