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[podcast]http://edwardwillett.com/wp-content/upLoads//2010/04/Wooden-Bones.mp3[/podcast]
It’s easy to not think very much about your bones. After all, they’re securely hidden away inside your body; not visible, except as hard lumps beneath your skin.
Funny thing, though: once you break one, it’s hard to think about anything else.
When first I wrote about bones, back in a 1993 instalment of this column, I told the story of my own broken-bone experience, for which I blame my big brother, Dwight (mainly because it was his fault).
I was seven years old and he was 12. We were both inside a big cardboard box that had held a refrigerator. For some reason, we’d decided it was fun to roll down the back steps inside this box. And it was fun, right ...
Posted by Edward Willett at 13:05, April 15th, 2010 under Blog, Columns, Science Columns |
[podcast]http://edwardwillett.com/wp-content/upLoads//2010/02/Spray-on-Liquid-Glass.mp3[/podcast]
“Spray-on liquid glass” sounds like a product you’d see advertised at two o’clock in the morning in an infomercial.
It sounds even more like a 2 a.m. infomercial product when you see headlines about it that claim it is “about to revolutionize everything.”
Maybe it’d sound more impressive if I used its more formal name, which is “SiO2 ultra-thin layering,” but that’s hard to type, so I’m going to stick with “spray-on liquid glass.”
Besides, that’s exactly what it is: an extremely thin layer of glass that can be sprayed onto...well, just about anything.
Though it was invented in Turkey, the patent for spray-on liquid glass is held by the German company
Nanopool.
It consists of almost pure silicon dioxide, a.k.a. silica, extracted ...
Posted by Edward Willett at 16:34, February 4th, 2010 under Blog, Columns, Science Columns |
Choosing what to wear in the morning is about to become even harder. Should one choose the bullet-proof blouse, the colour-changing cardigan, or the self-heating sari?
Clothing is about to be revolutionized by a slough of new technologies.
Imagine, for example, fabric that can change pattern or colour on demand. International Fashion Machines, a small company in Cambridge, Massachusetts, has developed Electric Plaid, which can do just that.
Currently on display as part of the National Design Triennial at New York’s Cooper Hewitt National Design Museum, Electric Plaid looks like a multicoloured, hand-woven textile--but a circuit board attached to the back can be programmed to send current through conductive fibers woven into the textile, heating ...
Posted by Edward Willett at 23:11, August 12th, 2003 under Blog, Columns, Science Columns |
One of the great joys of childhood is making sandcastles on the beach; and oddly enough, part of the fun is also watching a wave wash them away.
It's a little startling to find out, then, that something instinctively understood by children--that damp sand sticks together--was only recently explained scientifically in 1997. Dr. Peter Schaffer, an assistant professor of physics at Notre Dame University, was trying to assemble a swing set for his two-year-old. The swing's plastic pieces had to be weighted down with sand, and Schaffer noted that dry sand sifted easily through the tiny opening provided, but damp sand clumped around it. He wondered why--and decided to find out.
Schaffer and colleague Dr. Albert ...
Posted by Edward Willett at 21:26, July 16th, 2002 under Blog, Columns, Science Columns |
A new technology developed by the Canadian Space Agency to help control the new robot arm on the International Space Station may soon be finding its way into your car, your couch, and even your clothes.
It's called smart fabric, because it turns fabric into a sensitive computer interface.
The underlying technology, called Kinotex, was developed by the CSA to enhance the dexterity of the robot arm and to provide it with a sense of touch, so that it could tell when it made contact with something and stop its motion before any damage occurred. The technology also had to be robust enough to use in outer space....
Posted by Edward Willett at 14:22, February 20th, 2001 under Blog, Columns, Science Columns |
The first time I saw a Teflon-covered pan, when I was four or five, I thought it was magic. Now that I cook, I'm even more impressed by non-stick surfaces.
Teflon was discovered by accident by Roy J. Plunkett, 27, a DuPont scientist who was trying to develop a new chlorofluorocarbon (CFC) for use as a refrigerant by reacting a gas called tetrafluoroethylene (TFE) with hydrochloric acid. He'd prepared 100 pounds of TFE in pressure cylinders, which, for safety reasons, he stored in dry ice.
On the morning of April 6, 1938, Plunkett's assistant, Jack Rebok, opened the valve of a canister of TFE--and nothing came out. They weighed the cylinder. The gas was still inside, ...
Posted by Edward Willett at 3:47, January 30th, 2001 under Blog, Columns, Science Columns |
I hope this doesn't come as a shock to anyone, but Regina has a seasonal problem with potholes. But there may be hope for our pothole problem, and similar problems all over the world, thanks to the work of two University of Washington State University civil engineering professors.
Dr. Thomas Papgiannakis and Dr. Eyad Masad are carefully studying how and why potholes form. Their goal is to help engineers custom-design asphalt to suit the particular ground and climate conditions where a road is built.
In Regina, roads are built on a base 50 to 80 centimetres thick, depending on the traffic load. The bottom layer is clean sand, which aids drainage. Over that goes a layer ...
Posted by Edward Willett at 20:50, May 2nd, 2000 under Blog, Columns, Science Columns |
Residents of Cardiff, Wales, were bemused (and probably amused) not to long ago to see a respected geologist out on the streets of town early one Sunday morning, sweeping road dust into a dustpan.
Fortunately, Dr. Hazel Prichard hadn't been forced to take up stree-sweeping because she had lost her job at Cardiff University; instead, she was testing a theory that the streets of Cardiff--and most other major Western cities--are slowly becoming paved with platinum.
Dr. Prichard told a conference in Cardiff last week that the amount of platinum spewed out on city streets from the catalytic convertors used to control pollution is approaching the point where it might be economical to recycle it. Platinum, which ...
Posted by Edward Willett at 20:44, September 14th, 1998 under Blog, Columns, Science Columns |
"Keep your feet on the ground" is good advice for anyone--unless, of course, you're inside, in which case you can only keep your feet on the ground if you happen to live in a sod shanty.
Otherwise, you're going to have to keep your feet on some kind of flooring: and most likely, that flooring is going to be either carpet or "vinyl."
Carpets, of course, have been around for a long, long, time, and for most of that time, they've been woven from wool or some other natural fiber. But these days, weaving is passé. Instead, more than 80 percent of North American carpets are tufted....
Posted by Edward Willett at 11:06, October 23rd, 1995 under Blog, Columns, Science Columns |
We wax floors, cars and skis; make wax paper and wax candles; use wax in the creation of batik wall-hangings, lost-wax bronze sculptures and wax-crayon masterpieces; use mustache wax and at Hallowe'en have even been known to wear wax lips. Which, naturally, brings up the question, "What is this thing called wax?"
"Wax," says the encyclopedia, is the name "applied originally to naturally occurring esters of fatty acids and monohydric alcohols." Esters, says the same encyclopedia, are compounds formed by the interaction of acids and alcohols with the elimination of water.
Enlightened? Perhaps not. But don't worry about it too much, because these days, the word "wax" is also applied to any number of non-esters which ...
Posted by Edward Willett at 15:58, October 9th, 1995 under Blog, Columns, Science Columns |