But then, a decade ago, his daughter Anna learned to tie her shoes, and O`Reilly decided that her shoelace problem wasn`t worth passing on to another generation. Don`t get upset anymore, as new research from the University of California, Berkeley, has uncovered the physics behind it, why knots fail, and why some laces are more vulnerable to error. As for laces in the sense we know in modern times, the Museum of London has given examples of medieval shoes from the twelfth century clearly showing that the lace passes through a series of hooks or eyelets on the front or side of the shoe and is bound in a knot instead of being hung in bulk.  Indeed, the Knights Templar code prohibited the wearing of shoelaces as conceited, « odious, and pagan. »  This lack of information caught O`Reilly`s attention because he studies dynamics – the science of motion – in flexible materials for flexible robots. While Disney`s Big Hero 6 may look cool on the big screen, a lot of mathematical models would be needed to know how and when the materials deform to build such a robot. O`Reilly passed this study of laces as a side project for two of his doctoral students, Christopher Daily-Diamond and Christine Gregg. It is as difficult to determine the exact history of laces as it is for shoes. Archaeological records of shoes are rare, as shoes were usually made from materials that deteriorated slightly. The Areni 1 shoe, dated to about 3500 BC. J.-C., is a simple leather shoe with leather « laces » that cross « carnations » cut into the skin.
The more complex shoes that Ötzi wore out of the ice, the man who lived around 3300 BC. J.-C., were tied with « laces » of limestone bark cord. For more than 40 years, Oliver O`Reilly`s laces have come just about every day. And most of those 40 years, O`Reilly didn`t think too much about it. The correct length of a lace that corresponds to a shoe varies according to the type of lace used as well as the type of tip. However, in the case of an approximate reference, the following instructions may be used.  Based on the video and other tests they performed on yaw knots, the team says two things happen when a spike is unleashed. First, the impact of the shoe on the ground detaches the knot. When the knot is detached, whipping the free ends of the laces – while the leg oscillates back and forth – slides the laces. The scientists then designed an experiment to measure how long it took for the knots to dissolve and how fast the laces slipped. The researchers worked on a tight budget and borrowed lab equipment over the weekend to design a mechanical pendulum that broke a plate. The momentum of the pendulum approached the movements of the legs, and the blow of the shoes with the ground.
The pendulum wore a lace at the weighted ends – the extra weight was needed to simulate how much the ends whipped the runners` shoes. The team used this controlled configuration to calculate the exact sliding rate of laces attached either grandmother or square. This is the curse of tennis shoe wearers everywhere: no matter how much you tie your laces, they seem to be reversed, often at the most inopportune moment. This is the first time scientists have unraveled why laces fail. The work also shows the best knots to attach it and could impact anything from operations to new cancer drugs. No matter how firm you are, I have the impression that some laces are doomed to go wild. The rigid section at each end of the yaw, which both prevents the thread from untangling and facilitates the holding of the tip and driving through the eyelets, is called Aglet, also written Aiglet. « I went online and found all these videos useful on how to tie your shoelaces, » O`Reilly said. « You were wonderful and very helpful, but I also noticed that there were no videos online about why your shoelaces are encircling. » « I didn`t want her to inherit my problems, so I went online and found some really useful videos to teach me how to tie her shoelaces, » he says. . . .