When tiny microbes jam up like fans exiting a baseball stadium, they can do some real damage. UC Berkeley physicists found this out the hard way when the baker’s yeast cells (Saccharomyces cerevisiae) they were studying multiplied so prolifically that they burst the tiny chamber in which they were being raised. When UC Berkeley postdoctoral fellow Morgan Delarue measured the force the growing mass of cells exerted as they pushed against one another, he calculated that it can be nearly five times higher than the pressure in a car tire — about 150 psi, or 10 times atmospheric pressure. This is more than just a weird observation, said Oskar Hallatschek, a UC Berkeley assistant professor of physics and leader of the team. Budding yeast or other living cells, which split in two and grow exponentially in number, may well generate such mechanical forces to alter their environment, possibly in damaging ways. This may be even more important for cells like yeast that cannot move. For full story, visit: http://news.berkeley.edu/2016/05/13/beware-of-microbial-traffic-jams/ ...

Watch in HD1080p: https://www.youtube.com/watch?v=WWvc0ag3tiw&list=PLOyuQaVrp4qqS8yBeQpIeMQ5bDoijOQ9c&index=16 Beginning with a long consideration of Cui Bo's "Hare and Magpies" of 1061, this lecture continues by looking at the bird paintings ascribed to Emperor Huizong and offering a new proposal for how these were made. It goes on to show and discuss bird-and-flower works by Southern Song Academy masters, especially Ma Yuan and his son Ma Lin. Continuing with a handscroll of ink-monochrome images by a late Song literatus-artist, it ends with a miscellany of album-leaf paintings in the Academy styles.

Environmental Economics and Policy C115, 001 - Fall 2013 Creative Commons 3.0: Attribution-NonCommercial-NoDerivs

Watch in HD1080p: https://www.youtube.com/watch?v=PhuO_TXCJcU&list=PLOyuQaVrp4qqS8yBeQpIeMQ5bDoijOQ9c&index=2 This lecture considers the growth of pictorial art during the Han dynasty (208 BCE to AD 220), beginning with paintings on silk (including the famous 'flying garment") from the tombs at Changsha, continuing with pictures on tomb objects (mingqi) and lacquer designs, and ending with the remarkable relief pictures on tomb tiles found in Sichuan. Early renderings of space and the beginnings of expressive rushwork are revealed in visual analyses of all these.