PHILADELPHIA — The extensive system of levees along the Mississippi River has done much to prevent devastating floods in riverside communities. But the levees have also contributed to the loss of Louisiana’s wetlands. By holding in floodwaters, they prevent sediment from flowing into the watershed and rebuilding marshes, which are compacting under their own weight and losing ground to sea-level rise.
Technology & Engineering
Shu Yang of the School of Engineering and Applied Science is featured for his research on combining the related structural color and water-repelling properties found in butterfly wings.
PHILADELPHIA — Making uniform coatings is a common engineering challenge, and, when working at the nanoscale, even the tiniest cracks or defects can be a big problem. New research from University of Pennsylvania engineers has shown a new way of avoiding such cracks when depositing thin films of nanoparticles.
PHILADELPHIA — The colors of a butterfly’s wings are unusually bright and beautiful and are the result of an unusual trait; the way they reflect light is fundamentally different from how color works most of the time.
A team of researchers at the University of Pennsylvania has found a way to generate this kind of “structural color” that has the added benefit of another trait of butterfly wings: super-hydrophobicity, or the ability to strongly repel water.
This weekend, Penn hosted the first Ivy Plus Symposium and workshops for diverse scholars, a national conference designed to encourage exceptional undergraduate students to pursue advanced training in the sciences, technology, engineering and mathematics, or STEM, fields.
Eric Rabe of the School of Arts and Sciences discusses the influence of social media on the presidential debate.