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galcerte commented on OpenWRT turns 20; wants to launch their "first upstream supported" design   lwn.net/ml/openwrt-devel/... · Posted by u/trelane
mcsniff · 2 years ago
Coming in at under $100 is a lofty goal, but if they make the hardware, I'll buy one. The Turris Omnia was close.

I've been using (and previously contributing) to OpenWrt for almost 10 years, it's an excellent project and deserves some spotlight, I really hope this gains some traction.

galcerte · 2 years ago
Call me crazy but I recall the Turris Omnia was 350 € last time I looked (~3 years ago). It could also take a fiber line as input, right?
galcerte commented on PipeWire 1.0.0   gitlab.freedesktop.org/pi... · Posted by u/shallow-mind
ratsmack · 2 years ago
But now, what are we going to do with systemd?
galcerte · 2 years ago
Unlike PulseAudio, dbus, and other userland components, it is perfectly possible to have a Linux system which works with most software without systemd. runit and OpenRC are two of the most popular init alternatives, which are just inits, and nothing else, unlike systemd. You might argue you have to use logind and udev, but that has been spun off into elogind and eudev. There is also seatd as an alternative to elogind, which is quite big itself.
galcerte commented on Electric vehicle battery prices are falling faster than expected   goldmansachs.com/intellig... · Posted by u/dakna
hinkley · 2 years ago
I think we should stop factoring our tires. EVs chew through tires because they’re heavy as hell.

If we play at being objective and get caught leaving bits out, people shut down and label you a liar.

I presume brakes and tires partially cancel out, depending on car model. Some vehicles do engine braking automatically (mine does).

galcerte · 2 years ago
SUVs are being sold like candy, and they are heavier than your regular sedan. This is especially so in the US, where it's not just SUVs but also trucks, and they are both bigger and heavier than in Europe. Being heavy is not exclusive to EVs.
galcerte commented on Barcelona Supercomputing Center   my.matterport.com/show/?m... · Posted by u/_Microft
mofeing · 2 years ago
No, but some colleagues do. Also, I think some of my simulation software will start to be used by the project.
galcerte · 2 years ago
Ah cool, will it be open sourced?

I'm on that project myself, we are also dealing with simulating circuits, buuut I feel like we could improve our approach somewhat lol. For example, we had a bunch of trouble trying to speed things up, I immediately thought of trying to make most things run on a GPU but we quickly found out that our circuits just have too few qubits to be parallelized decently.

More importantly, I am not very optimistic (to say the least) about the short- to medium-term real-world applications of quantum circuits we are looking into (we do time series classification, which is quite removed from other domains which work better on these computers), and I got the same feeling from the literature. Should I be feeling differently?

galcerte commented on Barcelona Supercomputing Center   my.matterport.com/show/?m... · Posted by u/_Microft
mofeing · 2 years ago
I'm working on classical simulation of quantum computers using tensor networks. Basically trying to push the frontier of quantum advantage / supremacy from the classical side.

BSC is fun due to its interdisciplinarity. I do quantum and HPC, but I have friends working on iron deposition on the seas (i.e. climate change), nuclear fusion simulations of a tokamak, large scale scientific visualization, protein folding and synthesis, ...

The European Chips Act is also coordinated from there so there is a ton of people working on hardware design (specifically RISC-V).

galcerte · 2 years ago
do you happen to be working in CUCO?
galcerte commented on Hilbert Transform   electroagenda.com/en/hilb... · Posted by u/topsycatt
galcerte · 2 years ago
I find it incredibly funny that this appears a couple of days after I finished my master's thesis. I realized I made a bit of a blunder a week before handing it in: I thought the Hilbert transform gets rid of the aliasing when a real signal's bandwidth reaches below the frequency origin and into negative frequencies, which it doesn't. The bandwidth "folding" is still there, but the negative frequency components are gone (which I did know). Since I got rid of the negative frequencies because of the symmetry of real signals about the frequency origin, there wasn't any point in doing the Hilbert transform. Thankfully I checked all the preprocessing steps I carried out in the thesis, and weeded out this unnecessary step.

In my defense, please do bear in mind that I have not had a thorough education in signal processing, physics degrees don't usually have courses like this. I know Hilbert spaces much more well than I do the Hilbert transform.

galcerte commented on Hilbert Transform   electroagenda.com/en/hilb... · Posted by u/topsycatt
ipunchghosts · 2 years ago
Are ML companies hiring for peeps that do dsp and ML? I'm looking for a new gig and do both!
galcerte · 2 years ago
I just so happen to be working on that at my company, but sadly we do not seem to be hiring more for this position, and I don't think you'd like how low salaries are in southern Europe.
galcerte commented on Show HN: I've built a spectrogram analyzer web app   webfft.net/dft/... · Posted by u/ssgh
shangers · 2 years ago
Can I ask what kind of use cases would a spectrogram have for radar data? I've been messing around with making my own spectrogram app as well (linux desktop app and not web app though) and would be stoked to know if there's any potentially easy to reach use cases for it
galcerte · 2 years ago
Radar signals are modulated in very specific ways, which are visible right away even with plenty of noise on a spectrogram. Classifying the modulation of radar signals is something common in military contexts, since it allows you to listen for emissions and be able to tell if it's an enemy or an ally. I bet it has more uses than that, but it's the first one I could think of.
galcerte commented on The tyranny of the rocket equation (2012)   nasa.gov/mission_pages/st... · Posted by u/brudgers
midoridensha · 3 years ago
How do you figure? With anti-gravity, you would need very little power for propulsion since gravity would not be a factor (or less, depending on how effective your anti-gravity tech is). The question is how much power the anti-gravity requires.
galcerte · 3 years ago
> The question is how much power the anti-gravity requires.

This is essentially a case of "draw the rest of the owl".

galcerte commented on The tyranny of the rocket equation (2012)   nasa.gov/mission_pages/st... · Posted by u/brudgers
16890c · 3 years ago
Well, the Alcubierre drive [1] uses negative energy, but at this point it is not clear whether this type of propulsion is just a mathematical gimmick. [1] https://en.wikipedia.org/wiki/Alcubierre_drive
galcerte · 3 years ago
We do not know if and I bet plenty of people do not believe such negative energy really exists.

Besides, all warp bubble metrics so far are inertial; meaning the ship is unable to accelerate, so they're a gimmick nowadays. I have hopes we find something workable though.

u/galcerte

KarmaCake day127September 29, 2021
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