[ad_1] Mechanical engineer Michael Gollner and his graduate student, Sriram Bharath Hariharan, of the University of California, Berkeley, recently visited NASA’s John H. Glenn Research Center in Cleveland, Ohio. There, they dropped burning objects into a deep pit and studied how fire vortices form in microgravity conditions. The Glenn Center …
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[ad_1] IMAGE: The evolution of infection in people as a function of the asymmetry in population distribution shows that when the boundary from high-density to low-density areas is closed, the total spread of the disease … More Credit: Image courtesy of Massimiliano Zanin WASHINGTON, November 17, 2020 – Pandemics are …
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[ad_1] Vibrations travel across our planet in waves, like chords resonating from a strummed guitar. Earthquakes, volcanoes and the hustle and bustle of human activity excite some of these seismic waves. Many others reverberate from wind-driven ocean storms. As storms shake the world’s seas, wind-whipped waves at the surface interact …
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[ad_1] Many types of motile cells, such as bacteria in our guts and sperms in the female reproductive tract, need to push themselves through tight spaces filled with viscous fluid. In recent years, the movement of these “micro swimmers” has been mimicked in the design of micro- and nanoscale self-propelled …
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