MIT 1, Universe 0!
This page and every sentence in it wins the prize for most depressing work-related reading of the month. I keep realising that I must have grown up on a different planet. I really hadn’t realised how recently things were shockingly horrible in what we in the East thought of as the enlightened Western Europe. For all the ills in the socialis bloc, at least scientists and engineers were, and still are, equally divided by gender… (See e.g. The chart on P.21 of this 2012 report on gender in science in the EU)
Excerpt from “The academic labour market” edited by Gareth Williams, Tessa Blackstone and David Metcalf, Elsevier, 1974
One of the most bizarre and inspiring science articles I’ve read recently…thanks Thomas! http://www.theguardian.com/technology/2015/jun/18/google-image-recognition-neural-network-androids-dream-electric-sheep
Awful pun in the title, sorry! So here is the news. Scientists at Rochester have invented – well, not quite invented, but significantly improved over old versions – a device which works as an invisibility cloak. The new approach not only results in better concealment of the object, but can also use cheaper materials. In fact, you can even make your own using 4 lenses! Read the full article (from which I took the Rochester cloak building instructions and the image below) here. If you or your university has a subscription to the OpticsInfoBase journal, you can read the mathematical basis of the cloak. I love the title of the paper. I bet they enjoyed writing it.
J. C. Howell, J. B. Howell, and J. S. Choi, “Amplitude-only, passive, broadband, optical spatial cloaking of very large objects,” Appl. Opt. 53, 1958-1963 (2014), URL: http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-9-1958
Earlier this year, scientists from the University of Central Florida made the news with the first large-scale invisibility cloaking device. Here is their paper in Advanced Optical Materials:
Li Gao, Youngmin Kim, Abraham Vazquez-Guardado, Kazuki Shigeta, Steven Hartanto, Daniel Franklin, Christopher J. Progler, Gregory R. Bogart, John A. Rogers, and Debashis Chanda, Negative Index Materials: Materials Selections and Growth Conditions for Large-Area, Multilayered, Visible Negative Index Metamaterials Formed by Nanotransfer Printing (Advanced Optical Materials 3/2014)http://onlinelibrary.wiley.com/doi/10.1002/adom.201470019/abstract
“Regular 618046320536701272583608037733434096317263320037227965361869850786715388113584129-gon is constructible with ruler compass & trisector
So is 756760676272923020551154471073240459834492063891235892290277703256956240171581788957704193-gon. 90-digit prime!
However, regular 11-gon is not constructible with ruler, compass, and angle-trisector. Next impossible cases 22, 23, 25, 29.
It gets crazier. Gleason conjectured there are infinitely many primes of form 2^c.3^d+1. About 9k with k digits or less”