Apart from developing blended cements, researchers and companies are focusing on ways to use captured CO2 as an ingredient in the concrete itself, locking it away and preventing it from entering the atmosphere. CO2 can be added in the form of aggregates — or injected during mixing. Carbonation curing, also known as CO2 curing, can also be used after concrete has been cast.
Start-ups are vying to enhance the lives of those living with mobility challenges by adding artificial intelligence to wheelchairs. The thought is that computer vision and intelligent braking tools can make the devices safer and easier to operate. A few firms are gaining traction, so wheelchairs of the future may be able to do more than move people from one place to another.
Variations and dialects of spoken English, including what linguists refer to as African-American English, have been the subject of intensive study for years. But research on Black ASL, which differs considerably from American Sign Language, is decades behind, obscuring a major part of the history of sign language.
For pedestrians who cannot see or have limited vision, navigating the chaotic sidewalks and crosswalks of New York City was dicey enough before the pandemic. But the outbreak, blind people say, has made crossing the city’s streets even riskier and more harrowing.