Engineering

–°oconut shells can make concrete more durable

Scientists have found that concrete's compressive strength can be increased by 4.1% and its flexural strength by 3.4% by adding a small amount of coconut shell (only 5%). The material's performance increased by 6.1% compared ...

Robotics

A personalized exosuit for real-world walking

People rarely walk at a constant speed and a single incline. We change speed when rushing to the next appointment, catching a crosswalk signal, or going for a casual stroll in the park. Slopes change all the time too, whether ...

Engineering

Scientists announce breakthrough in hypersonic heat shield

In a giant leap for future hypersonic flight, Chinese scientists have turned to multi-scale technology to develop a revolutionary new material that has achieved record high marks in tests for vital strength and thermal insulation ...

Engineering

What caused the collapse of the condominium building in Florida?

On June 24, 2021, at approximately 1:30 a.m. Eastern Daylight Time, Champlain Towers South Condominium, a 12-story 40-year-old reinforced concrete flat plate structure building in the Miami suburb of Surfside, Florida, United ...

Internet

Q&A: Home network can cause video delays on Zoom

Q: During Zoom video calls, my screen image follows my actual movements very slowly. If I move my head or speak, there's sometimes a delay of two seconds or more before it happens on my screen. (This didn't happen during ...

Engineering

3D printed titanium structure shows supernatural strength

A 3D printed 'metamaterial' boasting levels of strength for weight not normally seen in nature or manufacturing could change how we make everything from medical implants to aircraft or rocket parts.

Engineering

Engineers use kirigami to make ultrastrong, lightweight structures

Cellular solids are materials composed of many cells that have been packed together, such as in a honeycomb. The shape of those cells largely determines the material's mechanical properties, including its stiffness or strength. ...

Robotics

A wearable robot that makes climbing mountains easier

As people age, they gradually lose muscle strength in their arms and legs, making it difficult for them to participate in leisure activities such as hiking and traveling, and they often need to rely on assistive devices such ...

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