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...


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...

The Care and Feeding of Software Engineers...

Lots of truthiness in here...

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

A Murmuration...

The Loneliest Little Shop in the World...

The Mulka Store in Australia...

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...

Do Not Disturb...


Moscow Flash Mob...

Via my lovely bride:

Monday, June 25, 2012

A Satisfying Weekend...

Our living room opens onto our patio through a sliding glass door, or at least it used to.  Our old door was an old-fashioned glass door made of many individual panes of glass all held together by a wooden frame.  Our dogs, through years of scratching at the door, had worn through one of the wooden frame pieces, and burst one pane of glass right out of the door.  I made some emergency repairs with epoxy on the day it happened – and then we bought a replacement door.  This time it's a conventional hinged door (not sliding), and with a steel frame.  The dogs will not hurt this one!

I guessed that replacing the door would take a couple of days for Debbie and I, and that we might need some help (the new door was heavy!).  So we lined up Jimmy B. (our friend and neighbor) for some help, and this weekend was scheduled.

Saturday we “demoed” (demolished) the old door first.  This ended up taking most of the day, and involved one major frustration.  Once we got the old door physically out of the wall, we did a trial fit of the new door.  It's outside trim was larger than the hole left by the old door – we needed to cut between a half inch and an inch of stucco all the way around the door.  That's about 22 feet of stucco to cut.  Some of you may not be familiar with stucco – it's basically a half to three-quarters of an inch of concrete slapped onto a wire mesh made of high tensile strength steel wire. 

I'd never cut stucco before, so I did some Googling and found lots of advice.  All of it recommended using a diamond saw blade on a 7" angle grinder.  Naturally, this is a tool I didn't own (doesn't it always work that way?).  So down to Lowe's I went (an hour's round trip) to buy an angle grinder and a 7" serrated diamond blade.  I got back home, unpacked the new tool – and promptly discovered that there was no way the blade would fit on the angle grinder.  Argh!  Back down to Lowe's I went, whereupon I met up with a very helpful tools guy.  It seems that California passed a law that went into effect on January 1 of this year, outlawing angle grinders that would accept a saw blade.  Anywhere else in the U.S. I could still buy one, but not here.  Double argh!  Damn the nanny state!  However, the tool guy did make one very helpful suggestion: the diamond blade would do the same job on a worm-drive circular saw – and that's a tool I happened to own.  So back home I went, and drug out the huge, heavy, worm-drive circular saw.  I fitted the diamond blade and went to work cutting stucco.  This worked extremely well, but generated huge quantities of fine white dust.  We had to seal up the house with plastic to keep the dust out, and even so some leaked in.

Once we got the hole cut, the more satisfying work began.  On Saturday evening we got the door in place, tacked it in (just enough to keep it from falling out).  On Sunday, we adjusted it for level and squareness, screwed it into the frame very securely, then filled the voids all around with construction foam (wonderful stuff!).  Then came the really fun part, the part that involved some craftsmanship: we formed a concrete support for the sill, patched the stucco all around the outside of the frame, and then re-grouted the gap between the inside sill and the entranceway tile.  That took all day, but when we were done it actually looked like a real door.  Now the only thing we have left to do is to trim off the construction foam that expanded outside the frame, and then mount some trim boards around the inside of the frame.  Easy stuff! 

The work we did on Sunday was strangely satisfying to me, in the same way that writing some challenging software is satisfying.  It's something about the need to engage my brain, the pure craftsmanship involved in building something, and obtaining pleasing results.  All of that put together is a reliable way for me to have a good day.

Plus we have a new door!

Charlottesville, Virginia: Epicenter of Greekness...

The University of Virginia is currently dealing with it's own version of the economic crisis facing Greece.  On the one side, fiscal sanity and a modicum of rationality – and unattractive squareness.  On the other side, a belief in magic, a second helping of irrationality – and media-friendly progressivism.  Who will win?  The Wall Street Journal describes the mess...

Dance of the Robots...

These are industrial robots – by far the most common kind of robot, though many people have never seen one before.  They come in many varieties; this one is a general-purpose type that can be fitted with many different tools at the working end.  Someone with far too much time on their hands put this together.  I don't care much for the music, but I find the idea of choreographed robots fascinating...and strangely attractive:

Quote of the Day...

Via my mom, a tweet from David Burge (aka Iowahawk):
Apparently, I'm supposed to be angrier about what Mitt Romney does with his money than what Barack Obama does with mine.

ObamaCare...

Today is probably the big day: the day that the Supreme Court announces their ruling on the challenge to ObamaCare's constitutionality.  Though they still have the option to delay their ruling even longer, if they follow their traditional schedule of ruling announcements, today would be the day.

Some folks (like myself) have trouble understanding how ObamaCare supporters could be supporters – the flaws of the bill are numerous and pretty obvious.  Here's an interesting post on a very liberal web site that lists the 10 things we're going to miss if ObamaCare is struck down.

To me, this list is a wonderful capsule view of the progressive mentality.  Basically it's a list of benefits without any tinge of the consequent costs.  It's tantamount to saying “Wouldn't you like to have a bag of gold delivered into your hands every morning?” – without ever stopping to think how you're going to pay for it.  Don't worry about it!  The government will provide.  Why, yes, of course I'd like my daily bag of gold!

Idiots.  Shallow, self-centered, feel-good, irrational, “gimme-gimme” obliviots.  The trouble is, there are so damned many of them that they've managed to elect a government.  They deserve the government they elect.  Trouble is, they drag me (and my wallet!) along with them, kicking and screaming.

November 2012.  It may be this country's last real hope, else we go the way of Greece...