Thursday, June 28, 2012
This Means Something...
...though I'm not entirely sure exactly what. Part of it, to be sure, is the ongoing triumph of style over substance. But I think it goes deeper than that.
One thing I feel sure of: this is not a good omen for our species' future...
One thing I feel sure of: this is not a good omen for our species' future...
Greece Showed the Way...
...and California said “Yeah, that's what I want to do!”
When does the madness stop? California seems hell-bent on destroying it's attractiveness on every front: as a place to live, a place to do business, and even as a place to visit.
It's close to being time to leave...as so many already have...
When does the madness stop? California seems hell-bent on destroying it's attractiveness on every front: as a place to live, a place to do business, and even as a place to visit.
It's close to being time to leave...as so many already have...
Both True and False...
If you're a programmer, you probably think of a boolean variable as having one of exactly two distinct states: “true” and “false”. The value of that variable is either true or false. It can't possibly be both.
Oh, yes it can!
Well, in “C”, at least, and probably in other languages that are relatively close to machine language.
Which got me to thinking... The rise of languages like Java, JavaScript, and C# – all of which nearly completely abstract the underlying computing machinery away – is an enabler of the current programming world in which developers can be quite successful without ever understanding how computers actually work. With languages like “C” (or assembly language), that just isn't so...
Oh, yes it can!
Well, in “C”, at least, and probably in other languages that are relatively close to machine language.
Which got me to thinking... The rise of languages like Java, JavaScript, and C# – all of which nearly completely abstract the underlying computing machinery away – is an enabler of the current programming world in which developers can be quite successful without ever understanding how computers actually work. With languages like “C” (or assembly language), that just isn't so...
Wednesday, June 27, 2012
The Curiosity Challenge...
On August 5th of this year, at 10:31 PDT, the Curiosity Rover is scheduled to plop down onto the surface of Mars. It is by far the most advanced probe anybody has ever attempted to land on any planet, and (assuming it lands successfully) we expect it to produce great science data at least through its primary mission.
Curiosity is also the biggest and heaviest probe anyone has ever attempted to land on Mars, and this meant some tough engineering problems to solve. The engineering solution involves an advanced ablative heat shield, the largest supersonic parachute ever designed, a rocket-powered sky crane, high resolution descent radar, and a completely autonomous computer-controlled landing system. Every bit of this has to work perfectly, or the Curiosity landing will fail (as so many previous Mars landings have failed). For those of us who, like me, are more excited about robotic probes like Curiosity than we are of the manned space program, this landing is real edge-of-the-chair stuff. It's also a spectacular feat of engineering in its own right, completely aside from the rover itself.
The video below is a sort of mini-documentary, very nicely done, about the technology developed to set Curiosity down on the surface of Mars...
Curiosity is also the biggest and heaviest probe anyone has ever attempted to land on Mars, and this meant some tough engineering problems to solve. The engineering solution involves an advanced ablative heat shield, the largest supersonic parachute ever designed, a rocket-powered sky crane, high resolution descent radar, and a completely autonomous computer-controlled landing system. Every bit of this has to work perfectly, or the Curiosity landing will fail (as so many previous Mars landings have failed). For those of us who, like me, are more excited about robotic probes like Curiosity than we are of the manned space program, this landing is real edge-of-the-chair stuff. It's also a spectacular feat of engineering in its own right, completely aside from the rover itself.
The video below is a sort of mini-documentary, very nicely done, about the technology developed to set Curiosity down on the surface of Mars...
Takedown!
Ann Althouse (one of my favorite bloggers) does a spectacular takedown of Jonathan Turley's proposal to pack the Supreme Court (a la FDR). It's a thing of beauty, her takedown – one imagines Turley's ego lying shredded on the floor...
Political Jokes...
Here's a big collection of contemporary political jokes, mostly about either Obama or Romney. Some of these are as likely to make me cry as laugh. The most interesting thing to me – Obama is getting the same treatment as Romney from the humorists. No more “hands-off” attitude. I guess there's just too much comedic gold for them there...
Sikorsky Prize Within Reach?
Watch the human powered helicopter below stay aloft for 50 seconds. Awesome! The Sikorsky Prize ($250,000) has remained unwon for 30 years. One of the three requirements is staying aloft for 60 seconds or more. They're getting very close on that front! Another requirement is reaching 3 meters (almost 10 feet) high; they've got a ways to go on that...
Citizenship...
Scott Adams (of Dilbert fame) has some thoughts on how one becomes a citizen of any particular country. He doesn't really propose any solutions, but makes some unusual observations and a few predictions. I found myself agreeing with many of his observations, in particular the arbitrary and capricious nature of “place of birth” as the determinant...
Optical Illusions...
It's a great one below, and there's another where that one came from. I love illusions like this one that demonstrate so clearly the major role our brains have in visual perception...
MRI of a Human Birth...
This is the first ever MRI “movie” of a human birth. It's just 25 seconds long, and is comprised (really) of a series of still images from the MRI, all strung together to make a movie. There's much more about this here.
Tuesday, June 26, 2012
Statoliths: How Plants Tell Up from Down...
Interesting article from NPR (though they've spelled “statolith” incorrectly on their drawing!) and a more detailed explanation...
The War on Drugs: an Alternative View...
This website is full of information and commentary about the futility and waste of the global war on drugs...
Housing Policy and the Great Recession...
An excellent interview of Peter Wallison by Anthony Randazzo of the Reason Foundation. Content like this is the main reason why Reason magazine is one of only two dead tree publications that I still subscribe to...
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