![]() We learned that the main influence on the sorting behavior is the beads' speed, not their size." Our model can predict how a system will move. "I did a lot of smaller experiments and fed that data into the model," Maity says. These describe all the interactions in the system and track where individual beads are at any time, says Morin." "With a mathematical model, we can discover general rules. To answer this question, they developed a theoretical model. "And of course, we want to understand why," Morin adds. "We saw that the small beads quickly migrated to the center and the big ones to the edge. "By introducing two sizes of beads, we added complexity that represents natural systems better," Maity explains. The flocking of a single species is understood well, but the Leiden researchers pushed this understanding by mixing two species. If there are enough beads, a collective vortex motion arises." Morin adds, "In other words, the beads behave like a flock even though they have no brain or cognition. We place them in a circular well with a fixed speed in a random direction. "We have two types of beads of different sizes. candidate Maity describes the experiment. ![]() "With flocks that fit under the microscope, we can learn so much more." Something that is not possible with animals. This way, they can control a single unit and manipulate huge flocks. Using microbeads ten times smaller than the thickness of hair, the researcher mimics flocks in the lab. But that is not the case above a certain density. "People expect that an object will always behave the same, no matter how many there are. "We study collective motions," Morin starts. What beads teach us about flocking phenomena ![]() This spontaneous flocking is the phenomenon that Morin studies, though not by observing animals. But a group of birds moves in the same direction as if they are one without following a leader: they flock. ![]() A single bird can fly in any direction it wants. ![]()
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