In the Supplementary Materials, there's a set of example videos of this work in action. In particular, the helix shape is pretty cool to see form in (essentially) the blink of an eye.
Neat! The paper slightly reminds me of imagining what would happen if you tossed a big handful of dry sand into the path of the ultrasound in the product you linked.
This is exactly what this reminded me of. I can forsee high fidelity solid, textured holograms just being some kind of colour changing liquid that's controlled with sound waves.
Perhaps 100 years into the future we will have dynamic furniture at a whim in our houses through some kind of similar technology .. or be able to materialize dynamic cooking pots exactly suitable for each dish, and then de materialize them afterwards (skip cleaning!), rather than store 20-odd differently sized pots.
I was thinking maybe some day an artist could release concept album that, with a little material added in a stereo field, animates material into a 3D moving scene, like a hologram movie except with real stuff.
You shouldn't cite things that you don't understand as "evidence". Take traditional Mayan belief systems for instance. They didn't involve any ideas about space travel or panspermia. The many different stories we have remaining broadly agree on a few themes that are shared with many other American cultures, namely that mankind was created by the gods out of natural materials (often corn or clay), which serves as moral reinforcement for our intimate connection to the earth.
The pleiades also weren't seen as the direction of a planet humans came from, they're just religiously important stars that may mark the date of creation. The qualifier may is used here because documentary evidence records this belief around the contact period, but it's not known whether it was believed when the calendars were initially created. The Mayans were fantastic astronomers and absolutely could have worked backwards from a later date.
I studied personally with Hunbatz Men in Mexico. Learned of the calendaring system linked to the travels of the celestial bodies and how the pyramids are 72,000 year calendars...
A centurian in the Mayan Order, studying their rites and symbolism.
Ive read many Rosicrucian Lessons, and books like that of Weed.
The anecdote about Tibet is interesting, though I couldn't find it in the book you mention. I searched for "cliff", "vibration", "sing", and a few other keywords. Do you remember more of the context?
After that part, I'm afraid I don't see the connection to the manufacturing technique that is the subject of this discussion.
This kinda reminds me of Terence McKenna talking about his experience with DMT.
He met "self-replicating machine elves". One of them told him, "don't be stuck in shock/wonder", and "do what we're doing".
Then he noticed that these 'beings' were creating various 'physical' objects in front of him with sound. Like they were "singing" these objects into existence. He called it, "glossolalia", or "speaking in tongues".
Through his DMT trips he apparently learned to use different sounds to create objects in front of him. Slight changes in the sound changed the appearance of the object.
Not that I necessarily believe him, but it peaks my imagination in fun ways.
There's a simple explanation for all of this. The sound wave frequencies are about coincident with the brain wave frequencies used in representing conscious thought. Signals of audio and visual perception in the brain are meant to be similar, you want to recognize the same object as the cause of both light and sound signals. So perhaps information in the optical nerve is serialized in a manner that makes the wave form similar to sound waves coming from the same direction and same characteristic length scale. Of course on psychedelics you can use sound or perhaps even blinking lights to create erroneous perceptions.
There was an art piece (at Burning Man, where else haha) that replicated this to some degree - simply a chill couch/bed thing that'd comfortably fit about five, with headset microphones and a projector, which'd visualize the sound.
And... however they put it together, it was magic. You really did feel like you were singing shapes into existence with your friends.
Oh jeez. I think that was 2013, and I think outer playa, but not deep playa - past the temple where things get calmer and more isolated, but not way the fuck out there.
I have no idea of the names involved :/ I might be able to recover it, as I think it was by some friends of friends.
I love the electric lazy, but that's not it :) The lazy is passive (you experience it while it happens), this was interactive.
PS - Did you know you can get a portable version? It's just the goggles, plus the sound/visual combos. (Or, at least, you used to be able to, haven't checked in years).
This (the "Logos" translated as "the Word") is just the New Testament cribbing straight out of Hellenistic Judaism (cuz in fact early Xianity was just a Jewish sect). In particular, Philo of Alexandria.
In high school we analyzed Genesis from a literature perspective and god definitely doesn't SING the world into being, he speaks it. ANd then sees that it is good. This included Genesis "2" (the second origin story)
Probably, the burning bush was one of the many species of tree to naturally contain DMT. It was burning at a normal pace, their sense of time was wrong. Wheels within wheels.
I've seen a similar explanation of the nature of thoughts: "the world of thoughts is the world of sound, each thought appears as a hollow shape emitting a unique sound, which appears to support that shape". In modern teems, that's very similar to a radiospace filled with signals and noise, each signal encoding a shape, everyone has a transmitter and a receiver that uses some well known method to translate shapes to signals. It helps that the signals space has infinitely many dimensions.
Would this also work by using the accoustic field on the material that instead of air, was suspended in a liquid? It seems like it's using the relative densities of the materials anyway, so whether it's sound through air or another medium seems equivalent.
Can someone summarize the advance relative to the prior art? There is quite a bit of previous work in this space including PixieDust (siggraph 2014) [0].
The current design seems to uses 3 transducers at 2.25 MHz with a static phase shifter added on top of the transducers. Then they capture floating / dropping particles which are moving past the design that they want to be printing.
I am currently working on building a similar mechanism as a pet project, inspired by the SonicSurface[1], with the goal of having a dynamic hologram while not requiring a huge computer hidden in the back.
I can imagine this being used with some form of acoustically hardening resin. Put it in a container where the walls are ultrasonic transducers and then make the wave interact in such a way as to create acoustic hotspots that harden the material
I don't think that's even necessary! You could use this acoustic technique to shape ordinary light-curing resin and then flash with UV light to harden it.
So they are using sound waves to form very exact force-fields in 3D. But when you throw matter in there, would that not interact and reflect all the waves in unpredictable ways, destroying the very exact force-field pattern they are trying to achieve?
It occurred to me last week that phrase is prompt engineering. He is giving the essential info to specify what he wants presumably because a shorter specification would yield a different result.
I wonder if star trek replicators are deterministic.
Does Picards frequent ordering of Tea Early Grey Hot make the probability of someone ordering "tea" more likely to be TEGH, and thus if Picard ordered TEGH frequently enough he would eventually be able to just say "tea"? Do replicators do continuous training or is the prompt inference engine static?
>It occurred to me last week that phrase is prompt engineering. He is giving the essential info to specify what he wants presumably because a shorter specification would yield a different result.
I think it's less that and more to illustrate Picard's personality traits and command style for the viewer - precise, methodical, practical, no nonsense. The computers in Star Trek are perfectly capable of understanding casual language (unless the plot demands otherwise.) Picard could simply tell the replicator what he wants when he says "tea" as if he were telling a waiter at a restaurant and it would work just fine, but he prefers giving an exact specification.
> I wonder if star trek replicators are deterministic.
It seems like it would be deterministic (or similarly consistent to your fav cafe), or else Picard would no longer trust his prompt and try new ones (no different than you would try new local cafes instead).
What isn't clear is if "Tea. Earl Grey. Hot." is the same as "Hot earl grey tea, please."
Deterministic for sure, that's why he always specifies hot. Though ChatGPT would infer it's hot due to the strong statistical correlation and proximity in it's linguistic training data (at least most of the time... probably, depending on the weather)... but in the future people have learned that it's a bad idea to trust language models alone, and although the singularity has occurred (Data), he'd rather not spend his time processing Picard's drink orders.
My theory is that hot and earl gray require specific instruction every time because they are dangerous and disgusting. It should never serve earl gray by default no matter how often it is ordered.
Controlling the motion involves a lot of prediction and wave modeling, which should be a perfect application for high-performance computing.