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
Tatsunori Iwamura, 61, professor of pharmaceutical sciences at Japan’s Matsuyama University, was busted for teaching his students how to make MDMA (aka Molly/Ecstasy) and 5F-QUPIC, a cannabinoid agonist. At some point, Iwamura had a license to manufacture illegal drugs for academic purposes but it had expired. From The Guardian: Local drug enforcement authorities believe 11 […]
The new episode of the always-fascinating Twenty Thousand Hertz podcast is a play-through of the Voyager Golden Record, the iconic message for extraterrestrials attached to the Voyager I and II space probes launched in 1977. Listen below. The Golden Record tells a story of our planet expressed in sounds, images, and science: Earth’s greatest music […]
Yale scientists have managed to restore some biological function to the brains of dead pigs killed in a slaughterhouse 4 hours before the experiment.
Seasoned chefs have a bit of a love-hate relationship with their cutlery. A really good set of knives has to prove its worth by being put through the wringer – and if they’re really good, they’ll still look great afterward. So it is with the Damasukasu Japanese 3-Piece Master Chef Hanshu Knife Set. Sitting in […]
With the intuitive software out there today, anyone can become a music producer. You’ve probably heard that from any number of laptop impresarios, but you still have to know how to use the tools – and Logic Pro X is one of the best platforms out there right now. In order to get the most […]
Believe it or not, PDF files have been the go-to format for contracts and forms of any type since 1993. And sure, they’re easily shareable – but that’s about it. When you need to edit or sign a document – and you will – that’s when frustration can set in. Luckily, there are workarounds, and […]