Category: physics

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Subliminal Sound to “Cure” Video Game Addiction

A Korean venture start-up claims to have developed an audio sequence that can communicate with addicted game players below the conscious level. The company wants game manufacturers to play the embedded subliminal messages when a young user has kept playing after a preset period of time.
From The Korea Times article:

“We incorporated messages into an acoustic sound wave telling gamers to stop playing. The messages are told 10,000 to 20,000 times per second,” Xtive President Yun Yun-hae said.
“Game users can’t recognize the sounds. But their subconscious is aware of them and the chances are high they will quit playing,” the 35-year-old Yun said. “Tests tell us the sounds work.”

Any scholarly evidence I’ve ever read up on has indicated that subliminal messages don’t work, but apparently marketing such messages is big business.

Xtive applied for a domestic patent for the phonogram and is looking to take advantage of the technology in other sectors.
“We can easily change the messages. In this sense, the potential for this technology is exponential,” Yun said.

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Lunar Eclipse

On Saturday and Sunday we, the human population, had an opportunity to see the moon completed blotted out by Earth’s shadow in one of those rare events known as a Lunar eclipse. Personally I’ve always thought solar eclipses to be the more interesting variety and so I never even bothered looking for the moon over the weekend.

However, thanks to the power of modern computing, here is an animated version of the entire phenomena, for those like myself that want all the reward without any of the effort.

animated eclipse

I have to admit, the orange glow that appears on the moon during the middle of the action is kind of cool.

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Medicine Hat Easter Weekend

I’m in Medicine Hat for the Easter weekend. I took along Stephen Hawkings book, “The Universe in a Nutshell”, which Anna-Maria gave me for my birthday, to read in the car. This morning I was explaining The Twins Paradox to Tracie, my brother’s wife — they are also here visiting. The Twins Paradox goes something like this:

In the theory of relativity each observer has his own measure of time… One of a pair of twins (a) leaves on a space journey during which he travels close to the speed of light, while his brother (b) remains on Earth.

Because of (a)’s motion, time runs more slowly in the spacecraft as seen by the earthbound twin. So on his return the space traveler (a2) will find that his brother (b2) has aged more than himself.

Although it seems against common sense, a number of experiments have implied that in this scenario the traveling twin would indeed be younger.

Tracie responded, “So if you fall in love with someone 30 years younger than you, you can use this to come back and be the same age.” I told her I was impressed that she so quickly picked up on the most obviously practical application that this concept enables us to do.

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Aerogel Photos

Aerogel will be used on the STARDUST spacecraft to capture comet particles from Comet Wild 2. The pics are amazing. They look fake, but they come from the NASA web site.

To collect particles without damaging them, Stardust uses an extraordinary substance called aerogel. This is a silicon-based solid with a porous, sponge-like structure in which 99.8 percent of the volume is empty space. By comparison, aerogel is 1,000 times less dense than glass, which is another silicon-based solid. When a particle hits the aerogel, it buries itself in the material, creating a carrot-shaped track up to 200 times its own length. This slows it down and brings the sample to a relatively gradual stop. Since aerogel is mostly transparent – with a distinctive smoky blue cast – scientists will use these tracks to find the tiny particles.

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Happy Birthday Albert Einstein

It would have been more cool if Einstein’s birthday was on the 12th, like mine. You’re probably wondering just how smart was he?

There is a parlor game physics students play: Who was the greater genius? Galileo or Kepler? (Galileo.) Maxwell or Bohr? (Maxwell, but it’s closer than you might think.) Hawking or Heisenberg? (A no-brainer, whatever the best-seller lists might say. It’s Heisenberg.) But there are two figures who are simply off the charts. Isaac Newton is one. The other is Albert Einstein. If pressed, physicists give Newton pride of place, but it’s a photo finish—and no one else is in the race.

Newton’s claim is obvious. He created modern physics. His system described the behavior of the entire cosmos, and while others before him had invented grand schemes, Newton’s was different. His theories were mathematical, making specific predictions to be confirmed by experiments in the real world. Little wonder that those after Newton called him lucky—”for there is only one universe to discover, and he discovered it.”

But what of Einstein? Well, Einstein felt compelled to apologize to Newton. “Newton, forgive me,” Einstein wrote in his Autobiographical Notes. “You found the only way which, in your age, was just about possible for a man of highest thought and creative power.” Forgive him? For what? For replacing Newton’s system with his own—and, like Newton, for putting his mark on virtually every branch of physics.