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ianrusselluk uploaded a new video
(4 weeks ago)
The Chinese repeating crossbow was a masterpiece of functional design, made entirely from bamboo and other wood. It was widely used for centuries, ...
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The Chinese repeating crossbow was a masterpiece of functional design, made entirely from bamboo and other wood. It was widely used for centuries, right up to the 20th Century. Less powerful than the old European crossbow, but still powerful enough to kill. And just watch how fast it could shoot! I managed 10 shots in 8 seconds.
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ianrusselluk uploaded a new video
(1 month ago)
My local pub is normally very much quieter than this...
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ianrusselluk uploaded a new video
(1 month ago)
A formal 2005 Christmas season 'Friday Evening Discourse' at the Royal Institution, London, presented by Ian Russell.
It was humbling to be invited...
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A formal 2005 Christmas season 'Friday Evening Discourse' at the Royal Institution, London, presented by Ian Russell.
It was humbling to be invited to present my own adaptation of a lecture series presented several times by Michael Farady in the early 19th Century, while standing in exactly the same place in the same room. I used Faraday's candle-related demonstrations to illustrate aspects of my work as a non-formal science communicator, presenting natural phenomena to young people in the form of interactive exhibits and science shows.
The Friday Evening Discourses were established by Michael Faraday in 1826. On one occasion, a terrified speaker ran away and Faraday himself had to step in with an impromptu presentation. Subsequently, until fairly recently, speakers were actually locked in an adjacent room for 30 minutes before the show started. (It seems that this room had ancient cartoons emphasising the danger of starting the Discourse with `Ladies and Gentlemen' ... In one of these cartoons, the speaker commits this solecism: the President is startled, a woman faints, and a footman comes forward to grab the speaker!)
The doors at either side of the hallowed demonstration bench are flung open when the ancient balcony clock goes 'ping' at 8pm. The quaking speaker enters through one door while the President of the RI goes in through the other. Following a strictly observed tradition, the speaker must plunge straight into the science with no preliminarly remarks whatsoever and stop when the balcony clock 'pings' again an hour later. It was the most terrifying speaking engagement I've ever faced. Until I managed to get the first laugh. Then it was downhill all the way to enthusiastic audience participation in the countdown to my final explosion...
The images and text projected on the large screen above me are unfortunately not visible in this film. I hope to show an edited version, including my accompanying slides, here soon.
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ianrusselluk favorited a video
(1 month ago)
Extraordinary and beautiful examples of toroidal vortices produced by dolphins, beluga whales, humpback whales, volcanoes, hydrogen bombs, and man....
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Extraordinary and beautiful examples of toroidal vortices produced by dolphins, beluga whales, humpback whales, volcanoes, hydrogen bombs, and man.
A toroidal vortex, also called a vortex ring, is a region of rotating fluid moving through the same or different fluid where the flow pattern takes on a toroidal (doughnut) shape. The movement of the fluid is about the poloidal or circular axis of the doughnut, in a twisting vortex motion. Examples of this phenomenon are a smoke ring or a microburst. Vortex rings were first mathematically analysed by the German physicist Hermann von Helmholtz, in his paper of 1867 On Integrals of the Hydrodynamical Equations which Express Vortex-motion Smoke rings have probably been observed since antiquity since they can easily be blown from the mouth.
http://en.wikipedia.org/wiki/Vortex_ring
This video has been re-uploaded by user MrBerkelland (http://www.youtube.com/watch?v=2eo2hDEGYo8) and actually has more views than this (This is the original).
***The 17 second clip of the humpback whale bubble rings shown from 1:56 to 2:13 is from danthewhaleman (The Whale Video Company).***
http://www.youtube.com/user/danthewha...
http://www.whalevideo.com
Music: "Beautiful Being" by Eastern Sun
Dolphin footage originally uploaded by:
http://www.youtube.com/user/chiajungchi
Etna smoke rings originally uploaded by:
http://www.youtube.com/user/icampabadals
Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use.
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ianrusselluk favorited a video
(1 month ago)
Jeb Corliss " Grinding The Crack"
Song: Awolnation - Sail
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