Mixed Reality Now a Reality
March 10, 2008 3:56 PM
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New research into "mixed reality states" promises Matrix-like "whoa"
Real-time model-based feedback is something that is far from commonplace in today's world. The basic concept of real-time feedback is to take a physical system, modeled by mathematic equations, and then couple it with a computer as a virtual system.
Sensor monitoring gives the processing logic an idea of how well the real world system is conforming to the theoretical model. The results are processed and yield adjustments (feedback) to the real world system to make it in tune with the theoretical model. The result is that the virtual and real world models converge into a single "mixed reality" system, bridging a the virtual (theoretical) and physical world.
Such an approach holds large benefits for everything from
better aircraft dynamics
smoother robotic control
. To accomplish such useful applications, researchers working on mixed reality had to start simple -- real simple.
Researchers at the University of Illinois created a virtual pendulum and a real world counterpart that behaves as the
world's first mixed reality system
. Bidirectional instantaneous coupling, adjustments both to the real world pendulum by motor feedback and the virtual pendulum by tweaking mathematical parameters, yielded a single system in which both systems' are synchronized. The result is two pendulums swinging as one.
The experiment, the first fully successful one of its kind, sounds simple but raises mind-blowing questions about reality. According to Illinois physicist Alfred Hubler, "In a mixed reality state there is no clear boundary between the real system and the virtual system. The line blurs between what’s real and what isn’t."
Hubler describes the pendulums synchronization, stating, "[The pendulums] suddenly noticed each other, synchronized their motions, and danced together indefinitely."
Two physical mechanical systems have been previously coupled, but never before has a real world and virtual one been mixed. Such a breakthrough was only possible thanks to ultra-fast computing, which allowed real-time processing of the pendulum data, and real-time response. Hubler states, "Computers are now fast enough that we can detect the position of the real pendulum, compute the dynamics of the virtual pendulum, and compute appropriate feedback to the real pendulum, all in real time."
Hubler thinks that eventually coupling of the real and virtual worlds, may lead to it being hard to tell what is real and what is fake -- a topic immortalized by generations of science fiction writers. Hubler worries people may become defensive and paranoid in the real world,
based on threats in the virtual world
The research was funded by the National Science Foundation and will be presented by Hubler at the annual American Physical Society meeting, which will be held in New Orleans, March 10-14, 2008.
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RE: Say What
3/10/2008 10:41:29 PM
If you told the computer pendulum to stop, the real world pendulum would stop as quickly (slowly) as the electronic one would.
The "disappearing" pendulum is kind of irrelevant. The point is, as long as someone cannot tell the difference between the "computer" pendulum and the "physical" pendulum (for instance, in a room with two small boxes with viewing windows, one is a real pendulum, and one is a hyper-realistic computer monitor displaying a 'perfect' render), then they are both as real as you, standing there staring at the two pendulums. You can't tell which is real or not.
The pendulums simply represent systems in which reality or illusion are displayed. To maintain the illusion, we have to assume that if your pendulum 'disappeared' for some reason, the computer would somehow make it disappear that followed our rules of physics, so you wouldn't realize that it wasn't "real". Of course, like in the
, this is sometimes impossible, resulting in the person "plugged in" rejecting the Matrix, and "waking up".
RE: Say What
3/11/2008 9:34:12 AM
Ok first if you attach a motor to a pendulum it is no longer a pendulum by definition a pendulum swings freely. So now you have created a computer controlled robotic arm.
Secondly if all you are talking about is if it is real visually then yes looking at two in a box, one could not tell the difference. However that is not how we judge reality, if I reach into said box and cannot touch it then it is not real.
All I am trying to say here is that this is not reality, it is just a mimic of it. Simple 2-way robotics if you will. The computer adjusts an image based on inputs from a physical device, it is a mimic not reality.
RE: Say What
3/11/2008 10:40:09 AM
... the fact that the physical pendulum has a motor is irrelevant. You're utterly missing the entire point of the experiment. The viewer has no idea the pendulum has a motor attached to it.
Forget it, I give up, re-read the comments in this article and the article itself, if you still don't get it, then either you're not old enough to get it, or you're just not going to get it at all.
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