Glad you found it valuable shehan. And thanks for the Loughborough U video. We've touched on 3D printing buildings and 3D printing with concrete a few times in DN, such as the D-Shape http://www.designnews.com/author.asp?section_id=1394&doc_id=261796 but I wasn't aware of LU's work. Most of ours have been about technologies aimed at building structures in space, like this one: http://www.designnews.com/author.asp?section_id=1392&doc_id=267732
As for where the power comes from, either we bring it along or capture it on site. The challenge being that it takes a fair amount of power to heat metal enough to bond into a monolithic mass. And of course the lack of gravity makes powders harder to handle. Perhaps adding a fluidic binder to the metal powder would be the solution. It could also serve as a flux to assist the bonding process.
William's got a point. Even though I like to say that technology problems can be solved with enough dollars and brains thrown at them, I know that's not always the case. Especially not when the laws of physics are the technology barrier. OTOH, the semiconductor industry has been truly innovative in finding ways to cope with those laws, again and again, over several decades, coming up with all kinds of new materials and processes along the way. OTOOH, they've had more money than other industries. Way, way more.
The first Tacoma Narrows Bridge was a Washington State suspension bridge that opened in 1940 and spanned the Tacoma Narrows strait of Puget Sound between Tacoma and the Kitsap Peninsula. It opened to traffic on July 1, 1940, and dramatically collapsed into Puget Sound on November 7, just four months after it opened.
Noting that we now live in an era of “confusion and ill-conceived stuff,” Ammunition design studio founder Robert Brunner, speaking at Gigaom Roadmap, said that by adding connectivity to everything and its mother, we aren't necessarily doing ourselves any favors, with many ‘things’ just fine in their unconnected state.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.