Robotic Sea Turtle Mimics Uniquely Adaptable Gait

Robotic sea turtle mimics uniquely adaptable gait
Notre Dame EE Ph.D. student Nnamdi Chikere and John Simon McElroy from University College Dublin. Credit: University of Notre Dame

Sea turtles can glide majestically through ocean waters and maneuver like armored vehicles over rocks and sand on land. Their locomotive adaptability makes them particularly interesting to robotics experts, who seek to learn the secrets of their gait and propulsion.

“The sea turtle’s unique body shape, the morphology of their flippers and their varied gait patterns makes them very adaptable,” said Yasemin Ozkan-Aydin, assistant professor of electrical engineering at the University of Notre Dame and a roboticist...

Read More

NASA InSight Study finds Mars is Spinning Faster

NASA’s InSight lander captured this selfie on April 24, 2022, the 1,211th Martian day, or sol, of the mission. Dust on its solar panels caused the lander to lose power in December of that year, but data recorded by InSight’s instruments is still leading to new science.
Credits: NASA/JPL-Caltech

Scientists have made the most precise measurements ever of Mars’s rotation, for the first time detecting how the planet wobbles due to the “sloshing” of its molten metal core. The findings, detailed in a recent Nature paper, rely on data from NASA’s InSight Mars lander, which operated for four years before running out of power during its extended mission in December 2022.

To track the planet’s spin rate, the study’s authors relied on one of InSight’s instruments: a radio transponder and an...

Read More

How Sensory Neurons Impact the Gut

Neuronal Piezo2 mediates gastric emptying, intestinal and colonic transit in mice

Gastrointestinal and digestive issues impact roughly 3 million people across the United States alone, and that number is growing. A new study from Scripps Research scientists shows how sensory neurons control our gastrointestinal tracts — critical information that could shape our understanding of related diseases and disorders.

The study, published in the journal Cell on Aug. 3rd, 2023, used a combination of human clinical data and animal models to reveal that the receptor PIEZO2 controls gastrointestinal transit through the stomach, small intestine, and colon by sensing the presence of food and slowing the rate of gut motility accordingly...

Read More

Researchers Trick Large Language Models into providing Prohibited Responses

chatgpt
Credit: Pixabay/CC0 Public Domain

ChatGPT and Bard may well be key players in the digital revolution currently underway in computing, coding, medicine, education, industry and finance, but they also are capable of easily being tricked into providing subversive data.

Articles in recent months detail some of the leading problems. Disinformation, inappropriate and offensive content, privacy breaches and psychological harm to vulnerable users all raise issues of questions about if and how such content can be controlled.

OpenAI and Google have, for instance, designed protective barriers to stanch some of the more egregious incidents of bias and offensive content. But it is clear that a complete victory is not yet in sight.

Researchers at Carnegie Mellon University in Pittsburgh are...

Read More