Thank you being around, bringing this nice community here, and helping with the federation!! 😁

Amazing work! Thanks a lot!! Took me a few days to get to it but I have upgraded now and it looks great 😄

First of all, congratulations for bringing a baby girl into this world!! You must be really excited! I am very happy for you!

This looks very cool. I set up a wiki (https://ibis.mander.xyz/) and I will make an effort to populate it with some Lemmy lore and interesting science/tech 😄 Hopefully I can set some time aside and help with a tiny bit of code too.

Thank you for the positivity 💚 I wholeheartedly agree!

Drama and negativity drives engagement, and this form of engagement can easily trigger a feedback loop in which negativity keeps piling on and voices of support are practically muted.

We are participating in an open source project that has some very ambitious goals. Things can be messy, mistakes happen, there are risks, and people have many different opinions and moods. Heated discussions can be a healthy part of the process. But, once the dust is allowed to settle for a bit, it is good to remember that we are humans and that we are here because we have some shared goals.

I think the majority of people around here are kind and have a positive outlook, but perhaps it is more motivating to speak out when we have negative comments than positive ones. So, thank you for taking the time to write this positive message!

I think that’s unlikely, but you’re very kind to phrase “no, dumbass” in that way.

Not at all!!! I like to make an effort to be helpful and learn myself in the process, but I also don’t understand all of the details and I don’t want to mislead others by saying something wrong with confidence 😄 I think that adding a disclaimer is a reasonable middle-ground. If an actual expert can chime in at some point it’s always appreciated - even if (or, especially if!) they call me out on how mistaken I am.

Kind of. I understand it a bit differently, but I might misunderstand some details. This is what I understand:

they successfully created a solid state oscillator

The resonator is a silicon nitride membrant with nanopillars grown on top to modulate its resonant properties. Here is an image from the supporting info showing how these are made, and the silicon nitride membrane that oscillates is the purple part:

where vacuum fluctuations become an important thermal factor, and overcame those factors to produce a (relatively short lived at thirty cycles) wave?

I think this is a mixture of two concepts that are mentioned, but the thermal influence and the vacuum fluctuations play different roles.

The noise comes from thermal fluctuations that are transmitted through phonons - no need to invoke vacuum fluctuations yet. At this large scale, the random phonons that naturally exist at room temperature will interact with the membrane as it oscillates, and so its motion over time is unpredicatable. Since the motion of the membrane is described in terms of its quantum-mechanical vibrations, the loss of this phase information means that the “quantum coherence” is decays very quickly due to noise. They have suppressed the noise by engineering the cavity in a way that specifically filters out the phonons that are most likely to interact with the membrane in a way that disturbs its oscillations.

The vacuum fluctuations were mentioned in the context of the fluctuations in laser intensity that are responsible for pushing the membrane such that it vibrates.

What was the medium of the wave: air seems incorrect… light, I suppose?

In the supporting info they mention that the device is in a vacuum chamber:

We also cannot exclude a small contribution to the observed dissipation due to collisions with the residual gas molecules in the vacuum chamber where the MIM cavity is located [19].

So it is not air. The membrane is the vibrating object. A laser provides the driving fields:

From the text:

In the textbook description of cavity optomechanics, the mechanical motion is driven by the vacuum fluctuations of the laser amplitude and transduced by the linear response of the cavity into phase fluctuations of the light field. The induced phase–amplitude correlation of the light field manifests as a noise reduction below the shot noise level (squeezing).

What would one use such an oscillator for, or is this more a demonstration of what is now possible in optomechanics?

In the introduction they specify a few examples. I quote from there:

Cavity optomechanics, in which the mechanical oscillator is dispersively coupled to an optical cavity, has enabled numerous advances, including ground state cooling, optomechanical squeezing of light and entanglement of separate mechanical oscillators. Yet, all these advances necessitate cryogenic cooling to reduce thermal fluctuations. Room-temperature operation is beneficial to the accessibility and widespread adoption of technology, as witnessed in other branches of physical science. Developing room-temperature quantum optomechanical systems would imply a drastic reduction in experimental complexity by removing the limitations imposed by cryocoolers such as poor thermalization, excess acoustic noise and limited optical access. Room-temperature operation could stimulate applications such as coupling to atomic systems, force microscopy and variational displacement measurements.

Thank you for that reference! Very interesting

I can tell you one benefit: Money. Most of my server’s costs come from storing federated content. Federating with threads would likely be expensive.

Awesome job! Thanks again! Upgraded without issue 🤘🏼

Yeah, I found out only after choosing that domain name… This TLD also gets penalized by the automatic e-mail spam detectors (like SpamAssassin). I wouldn’t pick the “.xyz” TLD if I were picking today 😅

You are awesome! Thanks :D I hope you get to relax this weekend!!

Thank you for your hard work!!

I appreciate that you going through this test period. I hope it all goes smoothly and that at least a few hairs remain on your heads by the end of this week. Good luck!

All fungi are magical ;)

The mycology community is more general in scope. Psychedelic mushrooms are not excluded, but there can be so much specialized discussion in that sub-category that is worth it having a more specialized community.

There is also the first community !uncle_bens@lemmy.ml dedicated to growing, but it is not very active.

Nice to see he has had a graphics upgrade :p

I wouldn’t use this language myself because I am not ready to defend that it is reasonable to apply the Universal Declaration of Human Rights in this context.

I think that they might be referring to Article 1, and possibly 5.

If this is their interpretation, then calling someone a worthless piece of trash is also a violation. You are talking to another human being as if they have less dignity, and you are treating them in a cruel and degrading manner.

For example I can go up to someone and insult them for all sorts of things - “you’re an ugly stupid worthless piece of trash” and that’s ok but I say “you’re a dirty [racial slur]” all of a sudden it’s different?

If it makes you feel any better, telling someone “you’re an ugly stupid worthless piece of trash” would get you banned from my instance too, so it is not so different.

I would like to make a list at some point with several community integrations and ask my instance’s users whether they would like some of them installed into the instance. This application will definitely go on that list! I do need to take into consideration how many resources each of the apps consume, to make sure I don’t bloat my server. But this one seems quite light. Is it?

Thank you for making this open source!

I’m not sure about Web Hosting. Many of us use a dedicated virtual private server (VPS)

I use https://serverspace.io, I think Lemmy.ml is hosted with https://www.hetzner.com/

These are servers that you access via SSH and can install the instance inside of it. I personally install using docker compose, but there are some other methods that are claimed to be easier. The cost starts at ~$5 / month. Currently I pay about $15 / month. You would then rent the domain name from a domain name registrar (I use namecheap.com) and ask them to point the domain name to your server’s IP address.

No, there is no API to get the votes (https://join-lemmy.org/api/). If my understanding is correct, now that I upvoted your comment my instance will push that information. I’m not sure whether it pushes it to dandroid.app first or to all instances, saying basically “Sal@mander.xyz upvoted https://dandroid.app/comment/441785”, and so every instance that has that comment can save my user ID in the “upvote” list of that comment, and that upvote is counted.

If only the vote direction was federated, then it would be very easy for me to spam the message “Upvote https://dandroid.app/comment/441785”. I would not even need to create an instance for that, I just need to speak ActivityPub. And it would be more difficult to detect that I am doing that, because the database would only hold the vote count.

I don’t think there is a way to ask an instance to reveal this list. You can only get it by directly querying the database if you have access to it. This is why if you fetch an older post or comment, it will arrive with a single or zero votes.