The huge Maurice J. Tobin Bridge that links Boston and the communities to the north is just three years shy of its 60th birthday. Every morning and sometimes in the evening, the two and one quarter mile cantilevered truss bridge backs up with Boston’s famously awful bumper to bumper traffic. With the horrific Minneapolis I-35 bridge collapse last night, it makes one trapped in traffic on "The Tobin" all more nervous.
I have been mid-span which the roadway bump literally starts bouncing which is especially pronounced when a trick goes by. I’m told it’s supposed to do this to relieve stress. Nonetheless, it’s unnerving given you’re 135 feet above busy Boston Harbor represented at that point by the Mystic River. The sensation of potential danger is accentuated by a large and much publicized LNG depot about a fifth of a mile upriver.
And it’s an old bridge like many in America. On Sept. 10, 1973, an overloaded gravel truck was headed north and hit a bridge beam bringing down a section of the southbound roadway above. A similar accident occurred in 1995. Besides localized damage, the bridge as a whole stood tall. And 34 days after the 1973 accident, the bridge was threatened yet again by a giant fire that destroyed 18 city blocks in Chelsea, Mass.
We looked at a number of sources to determine this year's greenest cars, from KBB to automotive trade magazines to environmental organizations. These 14 cars emerged as being great at either stretching fuel or reducing carbon footprint.
Researchers at MIT and Sandia National Labs have observed a reaction in lithium-air batteries that could help improve the design of these cells for electric vehicles and other applications.
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A quick look into the merger of two powerhouse 3D printing OEMs and the new leader in rapid prototyping solutions, Stratasys. The industrial revolution is now led by 3D printing and engineers are given the opportunity to fully maximize their design capabilities, reduce their time-to-market and functionally test prototypes cheaper, faster and easier. Bruce Bradshaw, Director of Marketing in North America, will explore the large product offering and variety of materials that will help CAD designers articulate their product design with actual, physical prototypes. This broadcast will dive deep into technical information including application specific stories from real world customers and their experiences with 3D printing. 3D Printing is
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