Researchers in China have come up with a new type of loudspeaker using nanotubes. The most common speaker and the one most of us have at home uses a magnet to push a cone back and forth. The cone moves the air, and thus, creates sound. They've been making speakers like this for decades.
Nanotube speakers use a thin nanotube film that creates sound not by vibrating, but by quickly heating up and cooling down between room temperature and 80°C (176°F). This temperature oscillation causes the air to move, which makes the sound. The nanotube film itself stays still.
The really cool thing is the nanotube film is flexible and can be stretched into nearly any form with very little
sound degradation. And unlike cone speakers, if there is a tear in the film it will continue to work. Anyone that's blown out a speaker can appreciate this. The researches say this speaker can reproduce sound in the full human audible
range with high sound pressure levels and low distortion.
Read more about it here.
posted by KRASK December 05, 2008 14:35 Technology comments (0)
posted by KRASK November 23, 2008 0:13 General comments (0)
Some time back a friend gave me a book, "The Strategy of Peace" by John F. Kennedy. This is a compilation of foreign policy speeches and is fascinating reading. With a few changes in specifics, such as dates and locations, it could have easily been written today. Here's an excerpt.
Are We Up to the Task?
January 1, 1960
"Certainly it is time for a change – time for us, in the words of Walter Lippmann, "to come alive and and to be alert and to show vigor, and not to keep mouthing the same old slogans, and not to dawdle along in the same old ruts”.
But the primary point is that, whether we like it or not, this is a time of change. As a people that set out to change the world, I think we should like it, however difficult the challenges. For no nation is at its best except under great challenge. The question for us now is whether in a changing world we will respond in a way befitting "the land of the free and the home of the brave” - whether we will be at our best in these crucial years of the world leadership – whether we will measure up to the task awaiting us.
That task is to do all in our power to see that the changes taking place all around us – in our cities, our countryside, our economy, within the Western world, in the uncommitted world, in the Soviet empire, on all continents – lead to more freedom for more men and to world peace. It is only when the iron is hot that it can me molded. The iron of the new world being forged today is now ready to be molded. Our job is to shape it, so far as we can, into the world we want for ourselves and our children and for all men.
This will require that we recapture our national purpose and redouble our energy. For we seem to have lost both the sense of the promise of America and the will to fulfill it.
The world is now waiting for us to reapply the faith we inherited from our fathers, and to give them a new creative validity in the uncharted world that surrounds us. The road ahead, to be sure, is a hard road, a road that man has never traveled before, a road full of great obstacles. But America has never long faltered in the face of new challenges."
In 1960, as in 1932, the American people can, as I hope they will, turn from the party of memory to the party of hope. But the fundamental call to greatness is coming not from any party or any person but from history and the hard logic of events. From the lessons we have learned in two world wars, one world depression, and the Cold War, as well as from the history of this republic, the American people will now, I trust, be granted the vision of a new American in a new world. This is the vision without which our people will perish."
posted by KRASK November 08, 2008 14:03 General comments (0)
"... government of the people, by the people, for the people, shall not perish from the earth."
posted by KRASK November 07, 2008 10:57 General comments (0)
Amsterdam is a city where cheese is king and the kind of cheeses is Gouda. While I was out getting slightly lost in the city (all those canals!), my fellow fromage fanatique ran into the Kassland cheese shop, one of the better know in Amsterdam. It has a staggering 280 varieties of cheese.
Gouda is a cheese with many personalities. When young, it's slightly creamy, easy to slice, and somewhat sweet in taste. But as it ages it turns into something completely different.
At 2 ˝ years old, Gouda becomes darker, harder, sweeter, and has an almost butterscotch flavor. The cheese is also spotted with little white crystals. These crunchy bits of cheese protein are pure sugary goodness. This is one of our favorites. We were also lucky to find a 6 year old Gouda, something I had not seen before. It's similar to the 2 ˝ year old, but even more intense. A very hard cheese and chock full o' crystals, it looks somewhat like a very dark Parmesan Reggiano, and I suppose it could be used in the same way. We ate it plain. It was that good.
posted by KRASK October 20, 2008 14:55 Monday Cheese comments (0)