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Microcapsule Method Captures Carbon

Researchers has developed a novel class of materials that enable a safer, cheaper, and more energy-efficient process for removing greenhouse gas from power-plant emissions. The team, led by scientists from Harvard University and Lawrence Livermore National Laboratory, employed a microfluidic assembly technique to produce microcapsules that contain liquid sorbents, or absorbing materials, encased in highly permeable polymer shells. The capsules have significant performance advantages over the carbon-absorbing materials used in current capture and sequestration technology.The new technique employs an abundant and environmentally benign sorbent: sodium carbonate, which is kitchen-grade baking soda. The microencapsulated carbon sorbents (MECS) achieve an order-of-magnitude increase in CO2 absorption rates compared to sorbents currently used in carbon capture. The carbon sorbents are produced using a double-capillary device in which the flow rates of three fluids — a carbonate solution combined with a catalyst for enhanced CO2 absorption, a photo-curable silicone that forms the capsule shell, and an aqueous solution — can be independently controlled.The MECS-based approach could also be tailored to industrial processes like steel and cement production, which are significant greenhouse gas sources.SourceRead other Materials tech briefs.

Posted in: News, Greenhouse Gases, Remediation Technologies

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Army Equips Stryker Unit With New Communications Technology

The Army's Stryker vehicle, designed to quickly move soldiers into a combat zone, is swift and mobile. Now its communications equipment will be, too.

Posted in: News, Wireless

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Smaller Lidars Could Let UAVs Conduct Underwater Scans

Bathymetric lidars – devices that employ powerful lasers to scan beneath the water's surface – are frequently used to map coastal waters. At nearly 600 pounds, the systems are large, heavy, and require costly, piloted aircraft to carry them. But a team at the Georgia Tech Research Institute (GTRI) has designed a new approach that could lead to bathymetric lidars that are much smaller and more efficient than the current full-size systems. The new technology, developed under the Active Electro-Optical Intelligence, Surveillance and Reconnaissance (AEO-ISR) project, would let modest-sized unmanned aerial vehicles (UAVs) carry bathymetric lidars.

Posted in: News

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New Device Measures How Birds Take Flight

It's quite easy to look at a bird and deduce that it flies by flapping its wings, but understanding exactly how a bird generates lift has long eluded scientists. Now engineers at Stanford have developed a device that precisely and humanely measures the forces generated by a bird's wings while in flight. The work promises to answer many mysteries of bird flight, providing aid in the design of innovative and efficient unmanned aerial vehicles, known as UAVs or, more recently, drones.

Posted in: News

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Contour Crafting: Revolutionary Robotic Construction Technology

The nature of construction has remained intensely manual throughout recorded history. Contour Crafting is a mega-scale 3D fabrication process aiming at automated on-site construction of whole structures as well as subcomponents.

Posted in: On-Demand Webinars

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Lubrication Considerations for Bearings

Bearings must be properly lubricated for optimized performance and long service lives, so choosing the correct lubrication is an integral consideration for engineers. AST Bearings’ tribological team has created this comprehensive whitepaper to best explain these lubrication considerations in rolling element bearings. The paper examines types of bearing lubricants (oil, grease and solid film), bearing lubrication methods, bearing lubrication shelf life, and a detailed table showing common bearing lubricants and properties.

Posted in: White Papers

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Will virtual traffic lights improve traffic?

This week's Question: Carnegie Mellon University researchers have claimed that they can reduce commute times by placing virtual traffic lights on drivers' windshield. Through connected vehicle technology, the Carnegie Mellon system replaces conventional traffic lights with stop and go signals appearing directly in view. The virtual traffic lights are generated on demand when needed, such as when two cars are approaching an intersection. Although the technology attempts to optimize traffic patterns, some analysts say that older cars, as well as traffic lights and infrastructure, would need to be upgraded before the technology would be viable. What do you think? Will virtual traffic lights improve traffic?

Posted in: Question of the Week

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