Electrical signals play a critical role in governing numerous functions within the human body, including transmitting messages between brain neurons, triggering the heart's muscle contractions, and enabling movement in the hands and feet, among other vital processes.
Researchers develop biodegradable optical fiber to measure or modulate electrical current in the body phys.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from phys.org Daily Mail and Mail on Sunday newspapers.
E-Mail
IMAGE: Researchers at the University of Campinas conducted more than 120 experiments with dunes of up to 10 cm that interact for a few minutes, obtaining a model valid for dunes. view more
Credit: Agência FAPESP
Barchans are crescent-shaped sand dunes whose two horns face in the direction of the fluid flow. They appear in different environments, such as inside water pipes or on river beds, where they take the form of ten-centimeter ripples, and deserts, where they can exceed 100 meters, and the surface of Mars, where they can be a kilometer in length or more. If their size varies greatly, so does the time they take to form and interact. The orders of magnitude range from a minute for small barchans in water to a year for large desert formations and a millennium for the giants on Mars.