Jumat, 30 Maret 2012

Electric Car from Rolls-Royce



Rolls-Royce's CEO Torsten Müller-Ötvös has said that the automaker won't be building a production version of its 102EX electric Phantom concept any time soon.

The car was unveiled with a great fanfare in February 2011, fulfilling a two-year-old promise that the company would experiment with battery power. At the time Müller-Ötvös said that the experiment was crucial for informing future decisions on alternative technologies. It even set up a dedicated website to debate whether you could have a super luxury electric vehicle.

After letting members of the media and potential customers test drive the vehicle, it appears to have decided that Rolls-Royce's future isn't going to be electric. At least not for now.

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The company says that demand for such a car - that could end up costing as much £600,000, double the price of a petrol-fuelled vehicle -- isn't sufficient to warrant its production.

Müller-Ötvös told Car and Driver that the car's acceleration and silence were praised but the charging times (several hours) and the range (120 miles) were not acceptable. He was open to alternative powertrains, and admitted that a hybrid could work.
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Flap Your Arms And Fly Like a Bird!



Jarno Smeets has been working for several months on his Human Bird Wings project -- assembling long nylon wings powered by outrunner motors, rigging up a complicated Android + Arduino + Wii arm-waving control system -- and now -- according to the video he's just published -- they work! Man can fly!
Some people are somewhat skeptical that little motors, shallow flapping, and trotting along a flat field are enough to launch a tall Dutchman into the air. You can watch the video and let us know what you think.


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Snowing with Microbes on Enceladus?


Aside from ancient Mars, the moons of Saturn might be one of the best places to look for life outside this planet. The methane lakes of Titan are promising places, but so are the spewing plumes of ice on Enceladus — and the latter would be an easy one to check, as it turns out. The Cassini orbiter just flew through them, and Cassini scientists want to go back and take a longer look.

Cassini has been examining Enceladus‘ ghostly, icy plumes for several years now, tasting the water, ice and organic material flying out of them. (Organic meaning carbon-based compounds, not necessarily living material.) The plumes are also piping hot, at least in distant solar system terms — about -120 degrees F, which equates to lots of thermal energy. And perhaps the most tantalizing part? The icy particles are salty, possessing the same salinity as Earth’s oceans.
Enceladus might have a vast interior sea, and it also has an energy source in the form of massive tidal forces courtesy of its planet. Saturn’s wrenching gravitational pull flexes Enceladus’ interior, generating heat. Heat and salty water sounds a lot like environments on Earth — like subterranean microbe communities in places like Yellowstone, or perhaps the thriving ecosystems that exist in hydrothermal vents in the absence of sunlight. Could Enceladus host any such life forms?

Enceladus Jets Dramatic plumes spray water ice from many locations near the south pole of Saturn's moon Enceladus. More than 30 individual jets of different sizes can be seen in this image captured during a flyby from NASA's Cassini spacecraft on Nov. 21, 2009. NASA/Cassini Imaging Science Team

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It would be fairly simple to find out, according to Carolyn Porco, a renowned Cassini scientist and leader of the spacecraft’s imaging science team. All you’d need to do is fly by and take a whiff.
“It sounds crazy, but it could be snowing microbes on the surface of this little world,” she says in an interview with NASA’s science news portal. “It’s the most promising place I know of for an astrobiology search. We don't even need to go scratching around on the surface. We can fly through the plume and sample it. Or we can land on the surface, look up and stick our tongues out.  And voilà…we have what we came for.”

Simply flying through the plume would be easier than designing an interplanetary boat, at least.


 Enceladus: Cassini flew just 46 miles above Enceladus' south pole on March 27, 2012, cruising right through the spewing plumes seen here. This image is from 2009.  NASA/Cassini Imaging Science Team

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First Living Animal Captured via Scanning Electron Microscopy



Bombarded with electrons and sealed in a vacuum, the noble tick survived the ordea. You didn’t wake up this morning thinking that a tick under a scanning electron microscope was going to be the coolest thing you saw all day, and yet here you are. After discovering some ticks alive inside a vacuum drying chamber, Yasuhito Ishigaki of Kanazawa Medical University decided to see if the hardy little bloodsuckers could stand up to the electron bombardment and vacuum conditions inside a scanning electron microscope (SEM). They could, and he’s got the video to prove it.

SEM rigs are great for capturing very fine detail of very small things, but they aren’t easy on their subjects. They work by bombarding a sample with electrons and recording how they scatter to create an image. Air interferes with this electron beam, so all this takes place inside a vacuum. And samples are often stained or even coated with metal beforehand to enhance the resolution of the microscopy.


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All said, life is not good for a SEM sample. In fact, putting anything living into an SEM sample chamber pretty much ensures that it won’t be living when you take it out. But this clearly isn’t true for ticks. In the video below, you can clearly see the tick moving its legs. Ishigaki did this with 20 different ticks, and all of them survived, making them the first animals to ever be scanned with SEM.



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VIrgin Sends Humans Back into Mariana Trench


If you thought space was the only frontier Virgin has an interest in tackling, you’ve been missing out on Virgin Oceanic’s drive to pilot the first manned submersible all the way to the very bottom of the Pacific Ocean’s Mariana Trench--and thus dive deeper than any solo human has ever dived before. It’s a cool story that is still ongoing, and PopSci favorite IEEE Spectrum has an amazing semi-long read from its March issue up online today.

If you’re short on context, the context is this: the Mariana Trench is the deepest subsea place on the planet, reaching a known depth of more than six-and-three-quarters miles (some measurements are deeper but unconfirmed). Only two people have been down there, together, back in 1960 aboard what’s known as a bathyscaphe. The pressure there is something like 1,100 times greater than that at sea level--enough to crush most submersibles like an empty beer can. The temperatures down there are absolutely frigid. So naturally, Virgin is going to send a lone human down there.

The short video trailer below provides a bit more background, but we highly recommend a click through to the IEEE Spectrum piece, which takes you aboard the expedition paving the way for the manned dive. It’s worth perusing.



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Find the Nex Image for NASA


Nasa wants you to help search for spectacular but overlooked images from the Hubble space telescope.
Hubble has made more than a million observations during its two decades in orbit. Astronomers working with Hubble data have created amazing, iconic images of gaseous nebulae, forming stars, and massive galaxies.



Only a handful of researchers have looked at much of the Hubble archive, which is stored in an online public database. Nasa and the European Space Agency, which jointly run Hubble's website, want people to discover what's been overlooked.

The agencies are now running two contests for the best hardly-before-seen Hubble pictures. Because the multifaceted images are scientific data and not normal digital photographs, they contain far more information than is visible to the naked eye. By manipulating the images, members of the public may potentially reveal a different side of a famous picture such as the one above or uncover something completely new.

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For Hubble's Hidden Treasures Contest, amateur astronomers can use simple online tools to adjust the zoom, contrast, and color balance on images, and save the work in a standard JPEG form. Upload the pictures to a special Flickr page and they may be featured as future Hubble images of the week (or perhaps find their way onto Wired.com's space photo of the day collection). The user who submits the best photo will win an iPod touch.

If you want to dig deeper and learn how to use some astronomical image processing software, try Hubble's Hidden Treasures Image Processing Contest. Users can download raw Hubble data and manipulate the files to produce beautiful new results. Several different software options exist for the interested amateur image processor, including a free Photoshop plugin called Fits Liberator. Participants can upload their images to the competition's Flickr page and the winner will receive an iPad.
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