[HN Gopher] Compact holographic sound fields enable rapid one-st...
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       Compact holographic sound fields enable rapid one-step assembly of
       matter in 3D
        
       Author : taubek
       Score  : 99 points
       Date   : 2023-02-14 20:32 UTC (2 hours ago)
        
 (HTM) web link (www.science.org)
 (TXT) w3m dump (www.science.org)
        
       | AceJohnny2 wrote:
       | Well I just found the name of my new sci-fi technology.
        
         | [deleted]
        
       | rdevsrex wrote:
       | One more step on the road to programmable matter.
        
       | tanepiper wrote:
       | Cool, Sonic Screwdrivers
        
       | inanutshellus wrote:
       | Tea. Earl Grey. Hot.
        
         | cwkoss wrote:
         | 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?
        
         | [deleted]
        
         | mkaic wrote:
         | Obligatory https://xkcd.com/2570/
        
       | triptych wrote:
       | One step closer to transporter technology
        
         | sdesalas wrote:
         | One step closer to hologram technology... "Help me Obi-wan
         | you're our only hope."
        
       | shadowgovt wrote:
       | This is one of those cool ideas that is much easier to grasp with
       | some animated visuals. I haven't found one for this specific
       | application, but adjacent work in using sound to move small
       | objects is seen at https://www.youtube.com/watch?v=XpNbyfxxkWE ,
       | https://www.youtube.com/watch?v=3MXVSdXZzpc , and
       | https://www.youtube.com/watch?v=tzWP-NL3Lck
       | 
       | Controlling the motion involves a lot of prediction and wave
       | modeling, which should be a perfect application for high-
       | performance computing.
        
         | achalkley wrote:
         | Reminds me of Kryptonian tech in Man of Steel
        
         | rsingla wrote:
         | 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.
        
           | xixixao wrote:
           | https://www.science.org/doi/suppl/10.1126/sciadv.adf6182/sup.
           | ..
        
       | motohagiography wrote:
       | 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.
        
         | fermuch wrote:
         | Figure 6 shows the method with gel particles. If I'm
         | interpreting it right, it's suspended on a liquid (I most
         | likely am wrong).
        
       | dr_dshiv wrote:
       | This is cymatics!
        
       | haupt wrote:
       | Nobody tell Ted Faro.
        
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       (page generated 2023-02-14 23:00 UTC)