The science of sync, Steven Strogatz


How to grow a forest in your backyard, Shubhendu Sharma


Reading a Seismogram, a Funny & Illustrated Guide


Computer Simulation of an Earthquake at the Hayward fault in California


An earthquake is the result of a sudden release of “strain” that is built-up between two tectonic boundaries or at a fault line*, usually slipping in opposite directions.

The following video by the California Academy of Sciences shows a computer simulation of an earthquake at the Hayward fault which is one and the most concerning of several faults in California. The most famous fault being the San Andreas fault.

via KQED Science

  • A fault is a fracture in the rocks of Earth’s crust. There three main categories of faults: Strike-slip, dip-slip, & Oblique-slip.

Your Phone, Tablet, and Computer Screens Aren’t Safe from Hackers


Pixels on your gadgets’ screens act as accidental antennae that constantly broadcast screens’ contents. A new paper says the industry needs to fix this security risk before hackers can exploit it.

This hack is possible because the internals of every computing device we own give off electromagnetic radiation. It leaks from the cables and circuitry that carry the display signal from the processor to the screen, and it’s even emitted by the screen pixels themselves. These pixels [Correct? Else what?] become accidental antennas that transmit the display signal into our surroundings—one that a would-be hacker could tune into.

via AGU Highlights – Radio Science – Your Phone, Tablet, and Computer Screens Aren’t Safe from Hackers

DOI: 10.1002/2016RS006034

Flat plate vortex formation at low Reynolds number



Robbie Stevens: Flat plate vortex formation at low Reynolds number

Robbie Stevens: Flat plate vortex formation at low Reynolds number

The Photograph shown is the raw image with no alterations. The image depicts a flat plate wing, which is simultaneously pitching and translating rapidly over a short distance through water at a Reynolds number of 10,000. This work is targeted towards understanding the aerodynamics of small insects with an intended application for Micro-Air Vehicles. The vortices are visualised by injecting a dye composed of milk and water. The milk has good reflective properties and is neutrally buoyant so follows the real flow faithfully. The inspiration for using milk came while pouring milk into a cup of tea at breakfast one morning! The photograph was taken by myself using a Nikon D7000 digital SLR camera, with the shutter speed and ISO adjusted to maximise the light entering the camera and allow the vortex structures to have a high contrast against the background. There are reflections of the vortex structures on the surface of the wing and some air bubbles are also visible on the dye injection needle on the wing’s surface.

via Flickr

Earth has a non-threatening small orbiting asteroid


It was recently discovered that a small asteroid has been in a stable orbit around Earth for at least a decade. The nature of its orbit “prevents the asteroid from approaching much closer than about 38 times the distance of the moon.”.

Source: JPL via Slashdot news