The Michigan Engineer News Center

Water stays in the pipes longer in shrinking cities – a challenge for public health

The geographic locations where Americans live are shifting in ways that can negatively affect the quality of their drinking water.| Short Read

By Nancy Love, Richard Jackson, and Shawn P. McElmurry

Cities that experience long-term, persistent population decline are called shrinking cities. Although shrinking cities exist across the U.S., they are concentrated in the American Rust Belt and Northeast. Urban shrinkage can be bad for drinking water in two ways: through aging infrastructure and reduced water demand.

This article is republished from The Conversation. Read the original article.

The electrons absorb laser light and set up “momentum combs” (the hills) spanning the energy valleys within the material (the red line). When the electrons have an energy allowed by the quantum mechanical structure of the material—and also touch the edge of the valley—they emit light. This is why some teeth of the combs are bright and some are dark. By measuring the emitted light and precisely locating its source, the research mapped out the energy valleys in a 2D crystal of tungsten diselenide. Credit: Markus Borsch, Quantum Science Theory Lab, University of Michigan.

Mapping quantum structures with light to unlock their capabilities

Rather than installing new “2D” semiconductors in devices to see what they can do, this new method puts them through their paces with lasers and light detectors. | Medium Read