In 1883, Osborne Reynolds injected ink into water in a short, clear pipe to observe its movement. His experiments showed that as the input water velocity increased, the flow went from laminar (smooth and predictable) to turbulent ...
Soft Matter
Jun 3, 2024
0
102
What do the flow of cars on a highway and the movement of bacteria towards a food source have in common? In both cases, annoying traffic jams can form. Especially for cars, we might want to understand how to avoid them, but ...
Mathematics
Apr 30, 2024
0
140
From experience, driving through the city center takes longer than covering the same distance on an open country road. After all, you will encounter a lot of other road users, red lights, road works and traffic jams in the ...
Quantum Physics
Oct 12, 2022
0
245
Along with the use of face masks, social distancing in public remains one of the most practiced front-line defenses against the spread of COVID-19. However, flows of pedestrians, including those practicing the 6-foot rule ...
General Physics
Oct 19, 2021
0
17
It took a nanoscale construction project on par with the much larger ones peppering Nebraska highways, but physicist Xia Hong is now directing the haphazard traffic of electrons well enough to analyze it—and, down the road, ...
Nanophysics
Sep 22, 2021
0
22
The human world is, increasingly, an urban one—and that means elevators. Hong Kong, the hometown of physicist Zhijie Feng (Boston University), adds new elevators at the rate of roughly 1500 every year...making vertical ...
Mathematics
May 3, 2021
9
157
Scientists have found that bacterial groups spread more rapidly over surfaces when the individuals inside them move slowly, a discovery that may shed light on how bacteria spread within the body during infections.
General Physics
Nov 23, 2020
0
13
When cells experience a high level of stress—for example, when they are exposed to too much UV light—ribosomes inside the cell collide and get into traffic jams. Now, Johns Hopkins scientists have found a protein that ...
Cell & Microbiology
Aug 5, 2020
0
128
For the first time, researchers have demonstrated a light-based device that mimics a fish's incredible jamming avoidance response (JAR) by moving the frequency of an emitted signal away from other signals that could potentially ...
Optics & Photonics
May 9, 2018
0
316
Managing traffic noise pollution has vexed researchers in large part because of the broad range of frequencies we encounter on the road. Currently, only heavy, wall-like barriers can effectively dampen all of these various ...
General Physics
Oct 17, 2017
0
359
