A novel synchrotron technique for studying diffusion in solids

Understanding and controlling how the diffusion process works at the atomic scale is an important question in the synthesis of materials. For nanoparticles, the stability, size, structure, composition, and atomic ordering ...

New ultra diffuse galaxy found in the NGC 5846 group

Astronomers have detected a new ultra diffuse galaxy (UDG) located most likely in the NGC 5846 galaxy group. The discovery is part of the ongoing VEGAS survey aimed at investigating early-type galaxies in a range of environments. ...

Discovery of many new ultra-diffuse galaxies in galaxy clusters

In preparation for the new multi-object survey spectrograph, WEAVE, on the 4.2m William Herschel Telescope, the astronomical community is working on deep imaging surveys to identify the astronomical objects that will be studied ...

Mathematician calculates wave velocity for post-stroke therapy

A RUDN mathematician calculated the velocity of wave propagation in the brain in the course of external stimulation. This procedure is used to treat stroke patients. To do so, the scientists generally formulated the task ...

Beyond social networks: How cultural beliefs really spread

When Amir Goldberg had his first child a decade ago, he was bewildered to learn that some of his colleagues at Princeton University, where he was a doctoral student, weren't planning to vaccinate their offspring.

Making steps toward improved data storage

A team of scientists has created the world's most powerful electromagnetic pulses in the terahertz range to control in fine detail how a data-storage material switches physical form. This discovery could contribute to scaled-down ...

page 1 from 13

Diffusion

Diffusion describes the spread of particles through random motion from regions of higher concentration to regions of lower concentration. The time dependence of the statistical distribution in space is given by the diffusion equation. The concept of diffusion is tied to that of mass transfer driven by a concentration gradient. Diffusion is invoked in the social sciences to describe the spread of ideas.

This text uses material from Wikipedia, licensed under CC BY-SA