randformblog on math, physics, art, and design |
SeeReal showed a working prototype of a realitme holography display at DisplayWeek. The trick seems to be to reduce the vast amount of data usually needed for computer generated holography by tracking the eyes and generating only small parts of of the actual (full) hologram since only a small viewing angle is needed for each eye. The prototype was reported to show only a red image.
via heise news
As the interested randform reader knows I like to report about popular experimentation trends in science (like e.g. this post about resonance rice or this post about cornstarch music (which is linking also to the famous diet coke experiments, whose popularity seems to be unstoppable)), here is a new trend, namely: ripping phone books in half.
The theme of this years designmai was “digitalability”. Interestingly for product design this seemed to be ultimately linked to 3D-rapid-prototyping – at least in the main exhibition.
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A remarkable mathematical conjecture (proven 1995 by Sabitov) is that there exists no rigid bellows. This means if you have a closed volume which is formed by (triangle shaped) “plates” and if you deform it then the volume stays always constant (i.e. if it would have been a bellows then you couldnt press air out of it). This is why accordions need some elastic fabric in order to allow for deformation. May be also a useful knowledge for architecture, since it means that if you press a (closed) house on one side it would bulb on some other side.
The workshop Rigidity and polyhedral combinatorics is discussing related problems.
One of the interesting unknowns is the question wether the brain acts -at least partially- as a quantum computer. The discussion seems to have gotten again a boost – considering the number of conferences organized on this issue, like the already mentioned January swiss conference or the conference Quantum Mind organized by the center for consciousness and the Uni Salzburg or the conference Toward a Science of Consciousness 2007 in Budapest organized by the Hungarian Cognitive Science Foundation.
A reason for this boost may partially be due to the fact that optical imaging and mapping techniques are vastly improving. Optical imaging techniques are popular since they provide a noninvasive method to study the brain, like e.g. in experiments by Ed Boyden et al. were neurons were photostimulated via Channelrhodopsin-2 and other proteins (see also here) (where I have to say that the in the article mentioned lentiviral gene delivery sounds rather scary to me) or e.g. the interesting optical techique of OCT-Optical coherence tomography (or LMU OCT) using interferences of light with short coherence length.
OCT can currently be only used for investigating thin layers like skins, as can be seen at the above crumpled scan of a fingertip or – whats more important e.g. for investigating the retina – a thin layer of neural cells that lines the back of the eyeball.
Using a new way of organizing light pulses (FDML) researchers were able to provide rapid, high-resolution 3-D images of the retina as was presented on the Conference on Lasers and Electro-Optics, Quantum Electronics and Laser Science Conference by the Optical Society of America.
Why is the retina and the layers around it particularily interesting? Because the retina is capable to transmit a signal of a few photons, leaving enough space for quantum mechanical considerations, like in the famous discussion in here, where – even if this seems unrelated – e.g. the true size of a graviton may play a role.
As it seems the current believe is that brains probably do not act as quantum computers mainly due to the “disturbancies” of the information by the surroundings, which leads to decoherence – a general problem also for technical quantum computers. Among others there is some hope to get better results with regard to disturbances with the help of topological quantum theories, which can be imagined (very very loosely speaking) as quantum versions of solitons, i.e. waves which are very stable.
Not the newest news, but still noteworthy – the demo “debris” by Farbrausch, which was the winner of the demoparty breakpoint in April. The demo is a windows executable of 177 kByte! The trailer reminds a bit of sometimes and sometimes of float and Kapitaal.
A video of the demo can be found on youtube
As promised they have made the tool for generating the procedural textures available now: it ist called .werkkzeug 3 TE (while the tool is free, the texture generation library needs to be purchased).
Whereto would you like to drag the vertical object?
The idea to the above applet was formed by thinking about salience and 3D user interfaces in conjunction with two coils (a sort of 3D Moiré ).
(Closing the lose ends to two coils and sending an electrical current through one of the coils enables in principle inductance. However, observe that in this perpendicular arrangement of the two coils this gives only a very faint current in the second coil. For a stronger current the coils need to be aligned.)
Just two links to humanoid robot videos as an update (randform posts e.g. here or here).
One video is displaying a quite good jumping humanoid robot, the other video is displaying the already rather wellknown Jules of hansonrobotics.com…..Looking at Jules reminds again at the question about faces as interfaces and the uncanny valley, as e.g. discussed in this randform post.
The use of color in sculpture is a very difficult issue–