In a PLoS-One paper, Steven H. Collins (Department of Biomechanical Engineering, Delft University of Technology) and Arthur D. Kuo (Departments of Mechanical and Biomedical Engineering, University of Michigan) describe an ingenious new prosthetic foot that uses a microcontroller to guide a device that stores the energy of the downstep and releases it for the upstep, mimicking the natural functioning of unmodified human ankles.
We developed a microprocessor-controlled artificial foot that captures some of the energy that is normally dissipated by the leg and "recycles" it as positive ankle work. In tests on subjects walking with an artificially-impaired ankle, a conventional prosthesis reduced ankle push-off work and increased net metabolic energy expenditure by 23% compared to normal walking. Energy recycling restored ankle push-off to normal and reduced the net metabolic energy penalty to 14%.
Recycling Energy to Restore Impaired Ankle Function during Human Walking
Ziya Tong is a veteran science reporter who spent years hosting Discovery's flagship science program, Daily Planet: it's the sort of job that gives you a very broad, interdisciplinary view of the sciences, and it shows in her debut book, The Reality Bubble: Blind Spots, Hidden Truths, and the Dangerous Illusions that Shape Our World, […]
A new study on polar ice sheet melt warns that global sea levels could rise by almost six feet by the year 2100, an estimate twice as high as previously predicted.
Next year, NASA’s Artemis 1 mission will carry a baker’s dozen of small cubesats to space, including one that’s home to a colony of yeast cells. That cubesat, BioSentinel, will orbit the sun to help scientists understand how space radiation affects living organisms outside of Low Earth Orbit. NASA hasn’t purposely sent any lifeforms beyond […]
If you can build a cloud infrastructure, you can build a business. Companies are overwhelmingly turning to cloud computing to set up or bolster their network, and it’s easy to see why. It allows on-demand access to processing power, a la carte services, and nearly unlimited storage, all without adding extra systems and the maintenance […]
Does your gaming setup need an upgrade? No need to wait for Christmas. We’ve rounded up the latest tech accessories for your favorite video game platforms. All of them are already sale priced, but you can knock an additional 15% off the final price for Memorial Day by using the online code WEEKEND15. Audeze Mobius […]
Raspberry Pi is one of the world’s most versatile open-source computers. Alexa is a home automation hub with limitless potential. Together, they’re a dream team for ambitious makers, opening the door to everything from automatic lights to voice-controlled robots. Learning Raspberry Pi is meant to be relatively easy for newbies, but its applications with Alexa […]