Mechanical engineering

Popular Science reporter Helen Bradshaw writes that MIT researchers have improved the energy capacity of nonrechargeable batteries, the batteries used in pacemakers and other implantable medical devices, by employing a new type of electrolyte. “Expanding the life of primary batteries may also make them sustainable contenders,” writes Bradshaw. “Fewer batteries will have to be used in pacemakers as their lifespans increase, decreasing overall battery waste in addition to reducing the number of battery replacement surgeries needed.”

A stamp-sized reusable ultrasound sticker developed by researchers in Prof. Xuanhe Zhao’s research group has been named one of the best inventions of 2022 by TIME. “Unlike stretchy existing ultrasound wearables, which sometimes produce distorted images, the new device’s stiff transducer array can record high-resolution video of deep internal organs (e.g. heart, lungs) over a two-day period,” writes Alison Van Houten.

Prof. Kripa Varanasi and his colleagues have founded Alsym Energy, a startup working toward developing a lithium battery alternative, reports Hiawatha Bray for The Boston Globe. The founders say “they’ve built a new kind of rechargeable battery that delivers the performance of lithium ion cells at half the cost,” writes Bray.

Writing for The Boston Globe, Prof. Linda Griffith underscores the pressing need to invest in studying women’s health and menstruation science. “These were the attitudes society had about breast cancer decades ago; we didn’t talk about it. But then we finally focused on the science, and overcame the squeamishness about mentioning ‘breasts’ by creating a technical language that could be spoken without hesitation by anyone,” writes Griffith. “We need a similar scientific push for menstruation science, and a comfort level with the language that goes with it. It’s time.”

Graduate students James “Jimmy” McRae and Bert Vandereydt are on a mission to visit every Dunkin’ Donuts in Massachusetts, reports Michael Yoshida and Gladys Vargas for WDHD. “Seeing some older ones, some newer ones. Getting local cuisine on the way,” Vandereydt said. “We had pizza in the North Shore, roast beef in the North Shore ... it’s a lot of fun.”

Graduate students James (Jimmy) McRae and Bert Vandereydt have decided to visit every Dunkin Donuts in Massachusetts, reports Matt Shearer for WBZ. “The two have visited 65 of the Dunkin’s on their list, leaving just 231 to go,” reports Shearer.

MIT’s mini cheetah robot was taught how to goal keep using simulation, reports Emmett Smith for Mashable. “The robot was able to block 87.5 percent of the shots taken, which is just slightly above the best professional goalies in the English Premiere League,” writes Smith.

In a new paper, MIT researchers detail the use of reinforcement learning to teach MIT’s mini cheetah robot to play goalie in a soccer match, reports Brian Heater for TechCrunch. “In this work, we focused solely on the goalkeeping task, but the proposed framework can be extended to other scenarios, such as multi-skill soccer ball kicking,” the researchers explain.

Prof. Diana Henderson, Prof. Daniel Jackson, Prof. David Kaiser, Prof. S.P Kothari, and Prof. Sanjay Sarma have released a new white paper “summarizing their ideas for a new type of undergraduate institution,” writes David Rosowsky for Forbes. “The authors have done a commendable job identifying and assembling some of the proven high-impact practices each of these types of higher educational institutions can offer,” writes Rosowsky.

MIT researchers have found that the number of species and the average interaction strength determine whether different ecosystems would be stable or chaotic, reports Gabriel Popkin for Science. The researchers “grew microbes together in plastic wells and increase and decrease the concentration of nutrients to manipulate how strongly the different species interacted with each other,” explains Popkin. “The more nutrients, the more the different species competed.”

MIT researchers have created a robotic pill that can safely penetrate the mucus barrier in the digestive tract to deliver drugs more efficiently, reports Margaret Osborne for Smithsonian Magazine. “The device’s textured surface clears away the mucus, and the rotating motion erodes the compartment with the drug payload, which slowly releases into the digestive tract,” explains Osborne.

New Scientist reporter Alex Wilkins writes that MIT researchers have developed a robotic pill that can propel itself through mucus in the intestines and could enable some injection-only medications to be taken orally. “The pill is 2.5-centimeters long and 1-centimeter wide – about the size of a large multivitamin ­– and encased in a gelatin capsule that dissolves in stomach acid,” writes Wilkins. “The pH in the lower intestine activates the motor, which is powered by a small battery.”

VulcanForms, an MIT startup co-founded by Prof. John Hart, is a 3D printing company that aims to provide cutting edge, clean and futuristic manufacturing, reports Timothy Aeppel for Reuters. “VulcanForms builds metal parts by layering on and fusing together materials bit by bit – rather than cutting them out of blocks of metal or stamping them out in metal foundries,” writes Aeppel.

NBC News reporter Kimmy Yam notes that months after having all charges he faced under the “China Initiative” dismissed, Prof. Gang Chen and his colleagues have discovered a new material that can perform better than silicon. "The discovery could have far-reaching effects, as silicon is currently among the most widely used semiconductors, making up the foundation of modern technology from computer chips to smartphones," writes Yam. 

Jamie Earl White BS ’10, MS ’12 speaks with Fast Company reporter Clint Rainey about his startup, Unit of Work, which provides free consulting to workers trying to unionize their workplaces. “Our goal is to get resources to workers in underserved workplaces, but not make them a part of our own union,” says White. “We act more like consultants who help them get where they want to be with unionizing their workplace.”