Pages Register | Sign In

Science »

Tesseract

I am a Wrinkle in Time devotee. I’ve lost count of how many times I’ve read each book since childhood. On some level, I wanted to live them—instead of paying attention to my titrations in chem lab, I pondered the logistics of making stew over a Bunsen burner. And to this day I cannot read the opening scene without craving a tuna salad sandwich with pickles.

And I wanted to build a model of a tesseract.

In the books, the tesseract is described as the fifth dimension, which enables you to bend space-time and teleport.

“What is the first dimension?”

“Well—a line.”

“Okay. And the second?”

“Well, you’d square the line. A flat square would be in the second dimension.”

“And the third?”

“Well, square the second dimension. Then the square wouldn’t be flat any more. It would have a bottom, sides, and a top.”

“And the fourth?”

“Well, I guess if you wanted to put it into mathematical terms you’d square the [cube]. But you can’t take a pencil and draw it the way you can the first three. I know it’s got something to do with Einstein and time. I guess maybe you could call the fourth dimension Time.”

“That’s right,” Charles said. “Good girl. Okay then, for the fifth dimension you’d square the fourth, wouldn’t you?”

“I guess so.”

“Well, the fifth dimension’s a tesseract. You add that to the other four dimensions and you can travel through space without having to go the long way around.”

Continue reading... »

Today in Junk Science

From CNN:

Security experts say focus is shifting from analyzing the content of carry-ons to analyzing the content of passengers’ intentions and emotions.

“We are seeing a needed paradigm shift when it comes to security,” says Omer Laviv, CEO of ATHENA GS3, an Israeli-based security company.

“This ‘brain-fingerprinting,’ or technology which checks for behavioral intent, is much more developed than we think.”…

Several Israeli-based technology companies are developing detection systems that pick up signs of emotional strain, a psychological red flag that a passenger may intend to commit an act of terror. Speedier and less intrusive than metal detectors, these systems may eventually restore some efficiency to the airplane boarding process.

One firm, WeCU (pronounced “We See You”) Technologies, employs a combination of infra-red technology, remote sensors and imagers, and flashing of subliminal images, such as a photo of Osama bin Laden. Developers say the combination of these technologies can detect a person’s reaction to certain stimuli by reading body temperature, heart rate and respiration, signals a terrorist unwittingly emits before he plans to commit an attack.

With these technologies, the emphasis is on speed and seamlessness. Ehud Givon, CEO of WeCU, envisions a day when a passenger can breeze through a security checkpoint in 20 to 30 seconds.

Do these people not have a psychologist on staff? Because this is total garbage. Expensive garbage, to be sure, but garbage nonetheless.

Continue reading... »

Scientific/Statistical Interpretation 101

A rant.

Please, for my sake, stop using the phrase “scientific proof.”

Science is about probabilities, not proof.

Continue reading... »