One of the main attractions to the summer event was high-wire circus artist, Chris Bullzini who took part in an awe-inspiring tight-rope walk across the Lee.
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Beatles album photographer Robert Freeman dies aged 82 He was responsible for the covers to albums including Rubber Soul. Horoscopes Lotto. In Pictures: No needle for visitors to international tattoo convention The event was held in the Romanian capital, Bucharest. A rope not only sways but also moves in response to a person's movement, forcing the walker to constantly change position.
4 Lessons on Staring Down Fear and Taking Risks from Tightrope-Walker Nik Wallenda
In this shaky feedback loop, "small errors can be amplified very easily," says study author L. Mahadevan, an applied mathematician and scientist. The researchers created a simple model of a person on a rope with forces, masses, angles, and velocities to describe how the rope and person respond to each other. They also considered the sensory systems that alert us when our bodies start to teeter, including our eyes, the organs of our inner ear, and orientation information from our ankles and knees.
In their calculations, they suggest that rapid information about falling provided by the inner ear is sufficient to help a rope walker maintain his or her balance.
The team also discovered that a key feature affecting balance is the rope's sag. A tight rope with little sag makes quicker vibrations, whereas a loose rope with a lot of sag makes larger back-and-forth swings. Between these two challenging extremes exists a "sweet spot"— an optimal sag of about 3 feet where balancing is easiest , the researchers report online today in the Journal of the Royal Society Interface.
The sag of a rope changes as a person walks along it, and it is greatest when the person is halfway across. A rope walker who finds the sweet spot can balance more easily because there, "all your sensory control information can be easily tuned to the dynamics of the rope," says study author Paolo Paoletti, an applied mathematician..gelatocottage.sg/includes/2020-08-03/3015.php
Tightrope walk opens Norfolk and Norwich Festival
Expert balancers have discovered this optimal sag through repeated practice, the researchers say: A handbook for learning slacklining instructs beginners to set their ropes to sag 3 or 4 feet in the middle. The paper addresses the important role of the physical environment in maintaining balance, in addition to the traditional focus on the nervous system, says John Milton, a computational neuroscientist at Claremont McKenna College in Claremont, California, who was not involved in the work.
The study's authors are trying to answer that question in collaboration with Francisco Valero-Cuevas, a motor neuroscientist at the University of Southern California in Los Angeles. By outfitting expert slackline walkers at Santa Monica Beach with wireless devices that measure movement and stability, the researchers are testing whether stability changes along the length of the slackline as the model suggests.
Valero-Cuevas says the complexity of slackline walking appeals to him because "high performance behaviors are more likely tied to evolutionary fitness, like jumping from rock to rock or maintaining balance on a branch. This can provide insight into impairment and rehabilitation, he says.
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