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The single-beam mirage effect, also known as photothermal deflection, is studied using a free-standing, highly aligned carbon nanotube aerogel sheet as the heat source. The extremely low thermal capacitance and high heat transfer ability of these transparent forest-drawn carbon nanotube sheets enables high frequency modulation of sheet temperature over an enormous temperature range, thereby providing a sharp, rapidly changing gradient of refractive index in the surrounding liquid or gas. The advantages of temperature modulation using carbon nanotube sheets are multiple: in inert gases the temperature can reach > 2500 K; the obtained frequency range for photothermal modulation is ~ 100 kHz in gases and over 100 Hz in high refractive index liquids; and the heat source is transparent for optical and acoustical waves.
Douglas Rushkoff was born on February 18, 1961. After graduating from Princeton University he received an MFA in Directing from California Institute of the Arts.
Botanicalls Kits let plants reach out for human help! They offer a connection to your leafy pal via online Twitter status updates to your mobile phone. When your plant needs water, it will post to let you know, and send its thanks when you show it love. It comes as a kit so that you can hone your soldering skills (or teach someone else) while you build a line of communication between you and your houseplant! This kit comes with everything you need to get your plant tweeting in no time.
There is yet another new wave of start-ups emerging in the educational technology space and like those that came before, most of this new wave neglects to address some critical issues. Every few years, a new set of companies comes out with what they refer to as, “the next wave in digital education.” However, these “new” methods and technologies are rarely actually new. Experienced educators who have followed the evolution of digital education since its inception over fifty years ago, have seen it all. The new distribution technologies offered by the new web don’t actually enable new pedagogies that haven’t been tried yet. Since the mid-1980s, there has been adequate technology and tools available to allow us to try out the entire array of pedagogical theories.
Table of Contents What's a Programming Language? Why We Need another Programming Language JavaCC Java Reflection Eclipse Configuration Programming Language Example (Name: St4tic) 6.0- Grammar 6.1- Code Generating 6.2- Using Reflection 6.3- Core Creation 6.4- Making Interpreter System:out:println(1 + var) Summary Reference 1- What's a Programming Language?
<img class="aligncenter size-full wp-image-68747" title="invisible" src="http://www.wired.com/images_blogs/dangerroom/2012/01/invisible.jpg" alt="" width="660" height="371" /> Soldiers could one day conduct covert operations in complete secrecy, now that Pentagon-backed physicists have figured out how to mask entire events by distorting light. A team at Cornell University, with support from Darpa, the Pentagon’s out-there research arm, managed to hide an event for 40 picoseconds (those are trillionths of seconds, if you’re counting). They’ve published their groundbreaking research in this week’s edition of the journal Nature . This is the first time that scientists have succeeded in masking an event, though research teams have in recent years made remarkable strides in cloaking objects.
Three tips for escaping the creativity peloton without giving up on collaboration i Rate This
The Kickstarter is over, but if you missed out on backing us, not to worry. You can still join the thousands of other awesome Twine owners by pre-ordering on Supermechanical . It's the next best thing to being an original backer! Follow us on Facebook or Twitter . Want to hook up things to the Web?
Behind the TED Talk With more than a billion views, TED Talks have become a powerful cultural force. But it all starts with a single person on a stage ... At TED2010, we sent a video crew to follow two speakers as they prepared to give the talk of their lives.
Investor and serial entrepreneur Chris Dixon has written a notable (and mercifully short !) blog post about how social utilities like Google and Facebook have essentially become reputation engines powering the emergence of collaborative consumption startups like Airbnb and TaskRabbit. Dixon’s “Internet of people” argument relies on the idea that Google search has replaced real life social proof, but this kind of oversimplification overlooks a major problem yet to be solved … The premise behind emerging reputation-startups like Klout is that people will eventually outsource stuff like online reputation due to being overwhelmed and blindsided by the physical Internet. But Google search is not always a meritocracy — and somebody can totally cash in on that. Forreals yo; In third grade being the unique and uncommon ‘Alexia Tsotsis ‘ sucked, but, in adult life I’m all like,”Hell yeah, I’ve got the first slot for my name in Google!”
There’s always been a tension on the Internet between humans and algorithms. In the early days, Yahoo was a human-curated index, remember? But humans couldn’t keep up, and the algorithms took over.
“Eloquent. Extraordinary. Timeless. Paradigm-shifting. Classic.