John Rogers

Associated Press
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Building AI-Powered Operations and Systems That Win
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Operations
From ‘Mythbusters’ to Hands-On Honing
Using the OLED structure in this schematic, researchers were able to delay the degradation in brightness of an OLED with the TADF emitter 4CzIPN by eight to sixteen times. First, the hole blocking layer was sandwiched between layers of Liq with thicknesses of 3 nm on the emitter side and 2 nm on the electron transport side. This newly developed modification enhanced the lifetime by eight times (red line). The lifetime was further increased by a factor of sixteen overall (green line) by also doping the emitter and host layer with an electron transport material and doping the electron transport layer with Liq, two enhancements previously reported in the literature for other OLEDs. The devices were operated at a constant current with an initial brightness of 1,000 cd/m2, and the lifetime plots in this figure were smoothed for clarity. These improvements bring highly efficient and low-cost displays and lighting with TADF materials one step closer to reality.
Product Development
Tiny Tweak Becomes OLED Breakthrough
Georgia Tech researchers built the 'Rescue Robot' to determine whether or not building occupants would trust a robot designed to help them evacuate a high-rise in case of fire or other emergency.
Product Development
Rescue Robot Studies Human-Robot Trust
Building Your Multi-Mode Freight Strategy
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Building Your Multi-Mode Freight Strategy
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Building Your Multi-Mode Freight Strategy
The right choice varies by situation. Learn which pitfalls to avoid and what to consider in making the best selection.
June 2, 2026
Grapes
Food & Beverage
California Bans Pesticide
It is used on numerous crops in the nation's largest agriculture-producing state, including alfalfa, almonds, citrus, cotton, grapes and walnuts.
October 10, 2019
The Skysource/Skywater Alliance co-founders David Hertz, right, and his wife Laura Doss-Hertz demonstrate how the Skywater 300 works Wednesday, Oct. 24, 2018, in Los Angeles. The company received the $1.5 million XPrize For Water Abundance for developing the Skywater 300, a machine that makes water from air.
Product Development
Device Makes Water Out of Thin Air
The system uses shipping containers, wood chips and other detritus to produce as much as 528 gallons of water a day for 2 cents a quart.
October 26, 2018
This Sept. 23, 2015 photo shows ground crew moring the Goodyear Blimp 'Spirit of Innovation' as it comes in for a landing at Goodyear Airship Base in Carson, Calif. Goodyear is letting the helium out of the last of its fabled fleet of blimps on Tuesday, March 14, 2017. Its replacement, 'Wingfoot Two,' will look about the same when it arrives at Goodyear’s California airship base in Carson later this year. But it will be a semi-rigid dirigible.
Product Development
Goodyear Retires Blimps
Blimps are out. Dirigibles are in.
March 14, 2017
Angels Flight railway is seen in the Bunker Hill section of Los Angeles on Wednesday, March 1, 2017. The tiny funicular that hauled people 298 feet up and down the city's steep Bunker Hill was shut down in 2013 after a series of safety problems. At a news conference Wednesday, March 1, Los Angeles Mayor Eric Garcetti said those issues are being resolved and the railroad's antique wooden cars should be back in service by Labor Day.
Product Development
World's Shortest Railway Reopens
It hauls people 298 feet.
March 2, 2017
This undated artist's rendering provided by Overseas Union Enterprise Limited shows a glass slide 1,000 feet above the ground off the side of the U.S. Bank Tower in downtown Los Angeles.
Product Development
70-Story Glass Slide
Nothing but 1¼-inch glass separates riders from the ground, promising to provide both a thrill and quite the view for anyone willing to open their eyes along the way.
March 3, 2016