Knowledge Wallet

The article is about what are fidget sinners made for A fidget spinner is a palm-sized, propeller-like object with three blades and a circular pad in the centre. One needs to spin it and balance the central pad on the fingers or palm. l Fidget spinners are toys used to calm fidgety people and work as a stress reliever. They help people suffering from Attention Deficit Hyperactivity Disorder Fidget spinners are available in various options—plastic, metal and with or without lights. The first fidget spinner was designed in the US by two 17-year olds, Allan Maman and Cooper Weiss, and their physics teacher, Eric Savino. They created the spinner by printing it on their school’s 3D printer in October 2016. The product was made for Allan to counter his ADHD. Within no time, the fidget spinner became a sensation. The trio bought eight 3D printers and relocated to Cooper’s basement to match production demands. However, demand quickly outstripped this capacity too and they had to move t...

A teenage girl has created a 3D-printed lens that, when fitted onto a smartphone and used with an app, can give a preliminary diagnosis for people with diabetic retinopathy,  reports IEEE Spectrum . Diabetic retinopathy is the most common cause of vision loss for those who suffer from diabetes, and diagnosis of the disease is usually done via a two-hour exam, which also requires a specialized camera to take a photo of the retina. Sixteen-year-old Kavya Kopparapu, along with her team, trained an AI system to identify diabetic retinopathy in photos instead, sharply cutting down the time it takes for a diagnosis. The system can spot diabetic retinopathy with the same accuracy of a human doctor. In October, Kopparapu partnered with Aditya Jyot Eye Hospital in Mumbai, India, to test her app Eyeagnosis. By that time, the app could not only detect diabetic retinopathy in images, but also blood vessels and other details that would usually require a fluorescent dye injection. Koppar...