How many bits of data can be crammed onto a single optical fiber? About 150 terabits per second per fiber, according to Partha P. Mitra, a physicist and researcher at Lucent Technologies' Bell Laboratories. "Currently, the maximum amount of data we send is around two terabits per second," says Mitra. He and researcher Jason Stark conducted experiments and report that, at a certain point, increasing signal capacity will not increase information transmission capacity. "We found that instead of output rising as the signal increases, the capacity peaks," says Mitra. "Beyond that, capacity doesn't increase proportionally to signal strength," he notes. Mitra adds that although there is room to grow our signal capacity, actually transmitting data at that rate will require new components and new de-signs for telecommunication equipment. For more information, call 908-582-2446.
Siemens and Georgia Institute of Technology are partnering to address limitations in the current additive manufacturing design-to-production chain in an applied research project as part of the federally backed America Makes program.
Most of the new 3D printers and 3D printing technologies in this crop are breaking some boundaries, whether it's build volume-per-dollar ratios, multimaterials printing techniques, or new materials types.
Independent science safety company Underwriters Laboratories is providing new guidance for manufacturers about how to follow the latest IEC standards for implementing safety features in programmable logic controllers.
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