Archive for 2006

More Robots

Tuesday, May 2nd, 2006

While we’re on the subject of robots, how’d you like to strap these to your feet and stroll through a minefield? 

That’s what developers at Singapore’s BioMedical Research Centre have in mind. But before you decide, you should know these shoes are designed to keep you from stepping on a landmine. There’s a research paper (in PDF format) about them, that has more technical lingo than I can decipher. Fortunately Robot Gossip has translated it all into laymen’s terms. 

The shoes have six short legs under each of your feet. The pods on each of the little legs has a metal detector. If one of the robot-shoe legs senses a trigger of a mine then it releases so that it can move up out of the way without setting off the mine. You would be supported by the other five legs on the shoe. When you step forward the leg locks in place again.

Also, everyone’s talking about Genibo — the robot dog that replaced AIBO — but there’s yet another robo-dog making the scene: the X-Cybie, which is an updated version of the iCybie. The X-Cybie is already available for order on Amazon, for $149, and will ship on May 4th. 

There aren’t any pictures the X-Cybie just yet, but word on the iCybie forum is that it’s basically the same as the iCybie (pictured below) except that this model has a fur coating that will come in a variety of colors. I can only imagine the fur would make the X-Cybie more fun to pet, but I can’t help wondering if it sheds. 

 

Another Robot Race

Tuesday, May 2nd, 2006

Last month I posted about the Great Robot Race. Well, the folks at DARPA at it again. Only this time robots will make their way through city streets, instead of the desert, during Grand Challenge

The Pentagon said Monday that a third Grand Challenge competition would be held to foster research and development into advanced robot vehicles.

In contrast to the previous contest, which took place in the desert on the border between California and Nevada, the new competition will be carried out in a mock urban area. Robots will be required to obey traffic laws while merging into traffic, as well as negotiating traffic circles, busy intersections and obstacles. The event is scheduled for Nov. 3, 2007.

First prize for successfully completing the 60-mile course in less than six hours will be $2 million. Second prize will be $500,000 and third prize is set at $250,000.

But if you want to participate, you’d better hurry. There’s already an Urban Challenge Participants Conference scheduled for May 20th, in Reston, Virginia. You can register at the Grand Challenge website. After that, you’ll have a bit more time (but not much), depending on which track you choose

DARPA also will make funding available for contenders before the finals, through two tracks:

  • Teams could submit detailed proposals for up to $1 million in technology development funds, with the government obtaining limited licensing rights to the resulting technologies. The selected teams would proceed to a semifinal known as the National Qualification Event.
  • Teams could participate in a series of qualifying tests, just as competitors did in the 2004 and 2005 DARPA Grand Challenges. The teams selected for the National Qualification Event would get $50,000, and the teams that are successful at that event will get $100,000 and a spot in the November 2007 finals.

Track A proposals are due on June 23rd, and Track B proposals on October 5th.

Science Mythbusting

Monday, May 1st, 2006

Over on Newsvine, I came across an interesting post by someone who claims to be busting the myths about science, and found a couple of interesting items on the list.

Myth 2. The Great Wall of China is the only manmade structure visible from space

There are several variations on this folkloric statement, and they’re all quantifiably false. Astronauts can spot the Great Wall from low-Earth orbit, along with plenty of other things like the Giza pyramids and even airport runways. But they can’t see the Wall from the Moon. 

Myth 12. There is no gravity in space

Blame the term "zero-gravity" for this common misconception. Gravity is everywhere, even in space. Astronauts look weightless because they are in continuous freefall towards the Earth, staying aloft because of their horizontal motion. The effect of gravity diminishes with distance, but it never truly goes away. It is also untrue that space is a vacuum. There are all kinds of atoms out there, albeit sometimes far apart. 

I don’t know about the gravity question (any physicists out there?), but apparently our mythbuster is dead on about the Great Wall.

“You can see the Great Wall,” Lu says. But it’s less visible than a lot of other objects. And you have to know where to look.

In fact stretches of the wall aren’t even visible from China. They’ve been buried by sand for centuries. NASA has used space-based radar to map out hidden parts of the ancient structure. [Astronaut Ed] Lu is trying to get a picture of it, too, with a digital camera. 

I don’t know if Lu every got his picture, but I did track down the pictures NASA took with its "space-based radar." 

The mythbuster also takes on some common myths about asteroids.

New in Sunnyvale: A VW Jet Car Putting Out 1450 h.p.

Monday, May 1st, 2006

A VW New Beetle with 1450 horsepower? Ya gotta see this video 

SF Chronicle’s Michael Taylor spent some time with the builder of this machine, Ron Patrick of Sunnyvale, California:

"You drive the car up to about 90 miles an hour and you spool up the jet, then hit it W.O.T. (wide-open throttle)," he said, fondly recalling one of his rides. "It’s one of the finest feelings you can have in your life. In the rear view mirror, all you see is light and hear the thunder of the jet. It’s like you’re going down the largest hill you’ve ever been on."

 

Jet cars aren’t new. This is how close the VW Bug and jet cars have come together, a Walt Arfons Jet Car driven by Paula Murphy (a.k.a. "the Flying Housewife" and "Miss STP") at Bonneville Salt Flats in 1963 (note the Bug in the background):

Drag racing VW Bugs aren’t just for Herbie any more. The VW Drag Racing Club cites one old Bug that can do a quarter-mile in 10.5 seconds @ 125 m.p.h. — and it’s driven to and from the track!

 

 

Weather Satellites Launch After Weather Delays

Monday, May 1st, 2006

Seventh time’s the charm, right?

                                                             

After six tries over eight days, NASA launched a Delta 2 rocket Friday and a pair of satellites that will give planet Earth its newest health checkup by examining the secrets of clouds.

The 12-story-tall rocket built by Boeing rumbled off Space Launch Complex-2 at 3:02 a.m. into foggy skies at Vandenberg Air Force Base.

The approximately $515 million mission placed two satellites into orbit: CloudSat and CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations). About 90 minutes later, officials confirmed that the satellites had arrived in space.

“With the successful launch of CloudSat and CALIPSO we take a giant step forward in our ability to study the global atmosphere," said David Winker, CALIPSO principal investigator from NASA’s Langley Research Center, Va. "In the years to come, we expect these missions to spark many new insights into the workings of Earth’s climate and improve our abilities to forecast weather and predict climate change."

 We wrote about the launch in anticipation on the 20th of April; Rocco kept us updated in the comment threads ("CloudSat can’t launch because of clouds. Go figure."); but now the wait is over, and you can view Friday’s successful launch here.

DIY Friday: DIY Energy

Friday, April 28th, 2006

A belated happy Earth Day to all. We went kinda "off the grid" last Friday, in honor of Earth Day, and thus found it somewhat difficult to get a DIY Friday post published. We had it all ready to go, but that whole smoke signals set up didn’t quite work. So, here’s our belated DIY Friday post, as the clock ticks down on Earth Day afterglow.

This first bit isn’t exactly a DIY project,  but having a solar generating briefcase last Friday — like the one we spotted on ProductDose recently —  might have helped get the DIY Friday post published. It’s handier than a gas generator, and so much less fossil fuel dependent. Besides, it generates more than enough electricity to power a laptop, so we could have charged up the iPod while we were at it. 

Speaking of iPods, this Altoid tin hacked into an iPod charger sounds like a good idea, if only the inventors could get it working. They cite a couple of reasons why it doesn’t, which I’ll post here in hopes that someone will be able to help them out. 

There are (at least) two reasons this charger _does not_ work:

1. The transistor doesn’t let enough current flow to fully charge the inductor.  The other option is a FET, but a FET needs a minimum of 5 volts to switch fully on. This is discussed in the SMPS section.

2. The inductor is simply not big enough. The charger doesn’t produce nearly enough current for the iPod.  We didn’t have an accurate way to measure the iPod charging current (save cutting apart the origional charging cable) until our parts arrived from Mouser.  The inductors recommended are nowhere near large enough for this project.  A suitable substitution might be the coil Nick de Smith uses on his MAX1771 SMPS.  Its a 2 or 3 amp coil from digikey:

[ http://www.desmith.net/NMdS/Electronics/NixiePSU.html#bom ]

This device can provide a small amount of power to a USB or firewire device, but not enough to charge an (3G) iPod.  It WILL power, but not charge, a totally dead 3G iPod.

Meanwhile, as long as we’re on the subject of power, this homebrew wind turbine sounds like a pretty good idea. I don’t know how much power it generates, but I bet it will power a laptop and an iPod (probably) as the builder says he’s seen "3800 watts from it in a high wind." I’m not sure how much power that is, but he says he’s a bit more than he can use. 

The guy who made the wind turbine would probably do well to team up with the David Mears — a professor of Bioresource Engineering at Rutgers University —  who managed to hack his entire house into such an energy efficient mode, with adjustments including a woodstove and a solar enabled greenhouse (pictured above),  that he and his family went 25 years without getting a heating bill. That’s also 25 winters of not burning fossil fuels to heat the house.  That’s not just good for the pocket book, but good for the earth too. And that makes for a happy (though belated) Earth Day.

The Big Break-Up

Friday, April 28th, 2006

Everybody’s talking about the big break-up. No, I don’t mean Nick and Jessica. I’m talking about Schwassmann-Wachmann, a comet that supposed to swung by earth next month, after it — according to one report — broke up for no apparent reason ten years ago. 

In 1995, Comet 73P/Schwassmann-Wachmann 3 did something unexpected: it fell apart. For no apparent reason, the comet’s nucleus split into at least three "mini-comets" flying single file through space. Astronomers watched with interest, but the view was blurry even through large telescopes. "73P" was a hundred and fifty million miles away.

No apparent reason? Not exactly. 

Naturally, I’m not the guy with the answers on this. (Again, I refer you to the screen name.) But Phil over at Bad Astronomy has what seems like a reasonable explanation to me. 

The exact cause is a mystery, though there are plenty of reason why a comet would fall apart. Comets are made of rock and ice. When they get near the Sun, the ice sublimates– turns directly into a gas — and flows into space, which is why comets look fuzzy in pictures. The actual nucleus, the solid part, is very small, but the coma, the fuzzy part, can be thousands of miles across.

It makes sense that after repeated passes of the Sun, enough ice is lost to venting that the structure of the comet can be fragile, since the ice in a way is holding the comet nucleus together. Once enough ice is gone, a breakup could occur if the sublimating ice builds up enough pressure to disrupt the structure. But that is just one explanation. The famous comet Shoemaker-Levy 9 broke apart because of the immense tidal forces of Jupiter’s gravity. Most comets don’t break apart; look at comet Halley, which has been circling the Sun for a long, long time (it was seen in ancient times). It goes to show that some comets are very fragile, and some are not.

OK, so it’s just one possible explanation, but it’s one more than I could come up with on my own. But just for the sake of argument, what other explanations could there be? Unless Bruce Willis or Morgan Freeman had an hand in it, I’ll take Phil’s explanation for now. (HubbleSite has the pics.)

NAB2006: TV Masters Illuminate Content Distribution

Thursday, April 27th, 2006

IMAS Publishing’s NAB Daily has a great set of stories covering events and presentations at the conference.

Though a good deal of the conference focuses on tech, in the end content remains king, and a new media platform will only succeed if there’s something interesting to watch on it. Distributing that content is opening up new revenue streams for companies both young and old, as conference attendees learned at yesterday’s Television Masters Luncheon:

The event was entitled, "New Distribution Pipelines: Turning TV Content Into Revenue."

The keynote address, delivered by Anne Sweeney, co-chair of Disney Media Networks and president of Disney-ABC Television Group, focused the necessity of change to maximize opportunity.

"Our industry is in the midst of a seismic shift," Sweeney said.

Citing an earlier era when cable and home video first threatened broadcasters, Sweeney cautioned the audience against "old thinking."

"Take heart, we have successfully overcome it in the past. We adjusted to the changing reality to reclaim our viewers," she said.

Sweeney said ABC made history when it agreed to make its content available on Apple’s iTunes service. Learning from the mistakes of the music industry, the network understood that this distribution route would not cannibalize its content’s value, but rather enhance it.

"iTunes created a new revenue stream for our content," Sweeney said.

Disney will continue to test and experiment in an effort to discern viewers’ preferences, Sweeney said. She described a planned ABC.com project during May and June in which episodes of popular ABC programs will be offered as free streams – including three required-viewing ad breaks.

"These emerging platforms aren’t ‘alternate,’ they’re additive," she said.

Sweeney acknowledged that the path from traditional broadcasting to today’s divergent distribution was a challenging one.

"We don’t have all of the answers, but we’re committed to working with our affiliates for the answers," she said. "I like the fact that old media is leading the way into the future."

In the lively panel discussion that followed Sweeney’s address, moderator Tony Kern of Deloitte & Touche led industry luminaries through the maze of issues facing both networks and affiliates.

Larry Kramer, president of CBS Digital Media, advocated experimenting with different ingredients, methods and technologies. "We’re basically trying everything," he said.

Kramer described CBS’ experiment with free streams of its 2006 March Madness broadcast. While the 2005 event, which required viewers to pay, drew an audience of 25,000, this year’s Webcast was served to five million viewers, 300,000 of whom signed on the first 15 minutes of the telecast.

Kramer felt the CBS broadcast audience hadn’t been compromised by the move. "Who wouldn’t rather be watching at home on a 50-inch plasma?" he asked. Instead, the Web feeds reached viewers who would otherwise have missed out on the network telecast, and the numbers bore out that hypothesis, revealing the highest ratings for that event in eight years.

 

 

European Hams Hear Signals from the Edge of Space

Thursday, April 27th, 2006

This one gets filed under "cool stuff," for sure:

Hams in Germany received signals from American spacecraft Voyager 1 March 31 using a 20 meter parabolic antenna of a radio telescope on a frequency of 8.4 GHz….

A team of hams at AMSAT-DL/IUZ Bochum (The Institute for Environmental and Future Research at Bochum Observatory) using Doppler shift and sky positioning, received the signal from a distance of 8.82 billion miles (14.7 billion km). That’s roughly 98 AUs, or 98 times the distance from the Sun to Earth. This is the first recorded reception of signals from Voyager 1 by radio amateurs….

Voyager 1 was launched in September 1977 to conduct close-up studies of Jupiter and Saturn, Saturn’s rings and the larger moons of the two planets. Originally built to last only five years, the probe will continue to send back astronomical information to NASA and the JPL until at least 2020. Voyager 1 will continue to study ultraviolet sources among the stars, and the fields and particles instruments aboard will continue to search for the boundary between the Sun’s influence and interstellar space. Communications will be maintained until the nuclear power sources can no longer supply enough electrical energy to power critical subsystems. 

 The achievement by the German hams makes Satellite Radio seem déclasse.

The Idiot Box and the Internet Collide at NAB

Wednesday, April 26th, 2006

NAB2006— the world’s largest electronic media show– is underway today at the Las Vegas Convention Center. Besides the slots, the big hit of the day is IPTV. Communications Daily (subscription required; 30 day trial available) reports:

 IPTV and mobile TV are to this year’s NAB convention here as HDTV was a decade-plus ago. "You can’t walk on the [NAB show] floor without hitting your head on IPTV," said Sebastian Moeritz, pres. of the MPEG Industry Forum, which is working with the Internet Streaming Media Assn. (ISMA) and others on IPTV (Internet protocol TV) specifications and standards.

The U.S. market for mobile TV is "huge," said Michael Schueppert, pres. of Modeo, now running a mobile TV trial in Pittsburgh. He said initial data indicate at least 10% of U.S. cellphone users will add mobile TV capability the next 6-7 years. Schueppert said that could mean about 20 million U.S. mobile TV users, "substantially more" than today’s total of XM and Sirius users…..

 PC World also wheighs in on nascent industry of delivering content to IPTV:

WHEN STEVE JOBS announced last fall that iTunes fans could buy episodes of Lost and Desperate Housewives for $2 a pop, a market for portable TV shows emerged overnight. And services like MobiTV and Verizon’s Vcast let cell phone owners watch TV on the go.

If your eyes can handle TV shows playing on screens as small as an inch on the diagonal, MobiTV’s $10-a-month service (available in the United States on Cingular, Sprint, and a few regional carriers) streams content from CNN, MSNBC, and other stations to a supported handset.

Verizon’s $15-per-month Vcast lets you watch live TV, but only on phones that support Verizon’s high-speed EVDO wireless service–and only in markets that offer it. Cingular recently announced plans to offer 18 channels of video as part of its $20-a-month Media Net package. The service will include 3- to 5-minute clips from popular programs such as King of the Hill and That’s So Raven. 

We’d love to hear about cool things you’re seeing at NAB. Tell us what’s going on (besides losing the nest egg) in the comments below.