Rubber band in super slomo

David Pescovitz 8:10 am Thu Nov 2, 2006

This video still depicts a rubber band in the middle of recoiling. Researchers at the University of Provence in Aix-Marselle, France, used ultra high-speed video to study "dynamic buckling instability" in super slow motion. The clips remind me of Man Ray's surrealist films. From New Scientist:

When a stretched rubber band is released at one end, a front of stress-free elastic material propagates towards the clamped end. When this front rebounds it results in a compression front that propagates backwards. This triggers an elastic instability referred to as dynamic buckling.

Normal buckling occurs when a solid rod is compressed by a load above a critical threshold. The material can no longer support the load and maintain its structure, and so the rod bends.

Dynamic buckling is the version of this instability which occurs when the compressive load is applied suddenly – when a rod is smashed into along its axis, for example. It creates a well-defined compression wave that zings along the rod.

Amazon used a China firm on U.S. blacklist for thermal cameras to monitor workers for COVID-19 fever

• Amazon's new Chinese thermal spycam vendor was blacklisted by U.S. over allegations it helped China detain and monitor Uighurs and other Muslim minorities READ THE REST
Financial Times journalist Mark Di Stefano accused of accessing private Zoom meetings, then publishing the information

Mark Di Stefano of the Financial Times is accused by The Independent of accessing private Zoom meetings held by The Independent and The Evening Standard as journalists were learning how… READ THE REST
Hackers tried to break into WHO, which faces more than two-fold increase in cyberattacks

Hackers tried to break into the World Health Organization earlier in March, as the COVID-19 pandemic spread, Reuters reports. Security experts blame an advanced cyber-espionage hacker group known as DarkHotel.… READ THE REST
Short Post, just one paragraph

Dessert cheesecake wafer bear claw fruitcake. Fruitcake chupa chups donut candy canes marzipan. Apple pie sweet roll tart chocolate cake macaroon marshmallow carrot cake gummi bears sweet. Pastry sugar plum… READ THE REST
Save 50% on a 1-year subscription to Dashlane's premium password manager

We all know vital information about ourselves and our private digital accounts can be compromised by cybercriminals. However, many would be frightened to know just how compromised they and their… READ THE REST
The Bite Helper removes the itch of a mosquito bite in seconds

While mosquitoes have certainly earned their title as the deadliest animal on earth, their impact on most of our lives is usually a lot less consequential. But even though they… READ THE REST