In a previous post we selected some resources on fluid dynamics. In that post we suggested the videos from the National Committe for Fluid Mechanics (notes on the website) that date to the 1960’s and is an excellent exposition to fluid mechanics. We share them below following a very clear demonstration of Euler’s equation and Bernoulli’s integral:
Author: Ibrahim El Merehbi
Sound of the Moving Earth
AudioWhat do you think an earthquake would sound like if you could hear it?
Here’s a sample (opens in a new tab).
The audio was generate by processing seismic data.
More samples are available on from the source where you can also find the corresponding spectrograms, (i.e. the representation of the frequency content of the signal and how it varies in time).
via Zhigang Peng @ Georgia Institute of Technology
Credit: Peng, Z., C. Aiken*, D. Kilb, D. Shelly, B. Enescu (2012), Listening to the 2011 magnitude 9.0 Tohoku-Oki, Japan earthquake, Seismol. Res. Lett., 83(2), 287-293, doi: 10.1785/gssrl.83.2.287. , and Kilb, D., Z. Peng, D. Simpson, A. Michael and M. Fisher* (2012), Listen, watch, learn: SeisSound video products, Seismol. Res. Lett., 83(2), 281-286, doi: 10.1785/gssrl.83.2.281.
As a follow-up here’s a nice video from USGS
Links – Have Fun Typing & Learning Vi/Vim Shortcuts
LinkVim Adventures – navigate the Vi/Vim land by learning Vi/Vim shortcuts
ZType – Typing (shooting) Game
Every Classroom Should Have This Infographic
StandardMindset: The New Psychology of Success by Dr. Carol Dweck is a must read for every parent, teacher and student. As a matter of fact, it should be read by everyone.
Parents and teachers should stop labeling students as “smart” or “dumb” or as “good” or “bad”. Instead they should be taught that everyone is capable of anything one puts his or her mind to.
Moreover, I think the two mindsets should explained to every student and the infographic be hanged in every classroom and house everywhere as a reminder of the two mindsets. Maybe also assign the book for reading as part of the reading list? Continue reading
NASA Launches a Rocket from an Airplane to deploy CYGNSS
StandardOn December 15, 2016 NASA successfully launched 8 small satellites by releasing a rocket from an airplane. The 8 satellites form the Cyclone Global Navigation Satellite System (CYGNSS) for tracking and studying the inside of tropical storms and hurricanes.
This step of releasing a rocket from an airplane is part of cutting costs.
Ibrahim El Merehbi 
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