A study of 20 doctors in their first or second postgraduate year highlighted deficiencies in their knowledge of the nerve supply of the hand and forearm. The children's game rock-paper-scissors (Figs. 1-3) can be used as a simple aide-memoir for the nerve supply to the hand and forearm. The median nerve creates the "rock position" of the pronated fist (Fig. 1). The radial nerve extends the wrist and hand forming the "paper position" (Fig. 2a and b) and the ulnar nerve creates the "scissor position" (Fig. 3), by clawing the ring and little fingers and spreading the index and middle and adducting the thumb and flexing the interphalangeal joint.

The rock is internationally recognized by a closed fist where the thumb is not concealed. It is also one of the most popular opening moves and this is why it is considered to be one of the most popular hand signals. Most players will view using the rock as an opening move to be somehow aggressive but would still use it because it is easy. The rock will beat scissors every time but will be beaten by paper.


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Paper is delivered in the same way as the rock except that in this case all the fingers and the thumb are extended in a way that they all face the same direction. The vertical paper or the handshake is strictly forbidden in tournaments of Rock Paper Scissors because it might resemble the scissors which can lead to unnecessary confusion. Paper is one of the most challenging opening moves because there is no indication of what you intend to do next. As a result, many players will be concerned when you use it as an opening move to your game. Paper will beat rock but will be beaten by scissors in no time.

Scissors are thrown in the same way as rock where the hand is clenched into a fist but the index and the middle finger are extended to the front in order to make an angle that is of 30 to 45 degrees in a way that would resemble a pair of scissors. The use of horizontal scissors is strictly forbidden in tournaments because they can resemble the shape of paper. Opening with scissors is not a very smart move because your opponent will be able to guess what your signal is going to be easily and so will be able to come up with a stronger signal.

One-dimensional chain of rock-paper-scissors cycles. The interactions on the S sites of the RPS chain (one single RPS cycle highlighted) are captured by the antisymmetric matrix A in Eq. (2). An arrow from one site to another indicates that mass is transported in this direction at a rate of r1,r2,r3>0 following the ALVE (1); the skewness r=r2/r3 defines the control parameter. The auxiliary site S+1 facilitates periodic boundary conditions (dashed lines) within the framework of topological band theory.

Lizard spock is a free expansion pack for the much-loved game of rock paper scissors. The additional characters were added by Sam Kass and Karen Bryla before being adopted, reordered, and overpopularised by The Big Bang Theory.

Scissors cuts paper. Paper covers rock. Rock crushes lizard. Lizard poisons Spock. Spock smashes scissors. Scissors decapitates lizard. Lizard eats paper. Paper disproves Spock. Spock vaporizes rock. Rock crushes scissors.

A competitive game of rock paper scissors involves strategy. Rather than trying to develop a model for that, though, you can save yourself some time by having the computer select a random action. Random selections are a great way to have the computer choose a pseudorandom value.

The mystery of biodiversity -- how thousands of similar species can co-exist in a single ecosystem -- might best be understood as the result of a massive rock-paper-scissors tournament, a new study has revealed.

The childhood game of rock-paper-scissors provides one solution to this puzzle, report researchers at the University of Chicago and the University of California, Santa Barbara in Proceedings of the National Academy of Sciences. A mathematical model designed around the game's dynamics produced the potential for limitless biodiversity, and suggested some surprising new ecological rules.

"If you have two competitors and one is better, eventually one of the two will be driven extinct," said co-author Stefano Allesina, PhD, assistant professor of ecology and evolution at the University of Chicago. "But if you have three or more competitors and you use this rock-paper-scissor model, you can prove that many of these species can co-exist forever."

The rock-paper-scissors rules are an example of an "intransitive" competition, where the participants cannot be simply ordered from best to worst. When placed in pairs, winners and losers emerge: rock beats scissors, paper beats rock, and scissors beat paper. But when all three strategies compete, an impasse is reached where no one element is the undisputed winner.

When more limiting factors are added to the model, the amount of biodiversity quickly increases as a "tournament" of rock-paper-scissors matches develops between species, eliminating some weak players but maintaining a stable balance between multiple survivors.

"What we put together shows that when you allow species to compete for multiple resources, and allow different resources to determine which species win, you end up with a complex tournament that allows numerous species to coexist because of the multiple rock-paper-scissors games embedded within," Levine said.

Allesina and Levine tested the realism of their model by successfully reverse-engineering a network of species relationships from field data on populations of tropical forest trees and marine invertebrates. Next, they will test whether the model can successfully predict the population dynamics of an ecosystem. Recently, Allesina was awarded a $450,000 grant by the James S. McDonnell Foundation to conduct experiments on bacterial populations that test the rock-paper-scissors dynamics in real time.

"If you're playing rock-paper-scissors and you lose rock, you're going to end up with only scissors in the system," Levine said. "In a more complex system, there's an immediate cascade that extends to a very large number of species."

The paper, "Competitive network theory of species diversity," was published online by the Proceedings of the National Academy of Sciences on March 14, 2011. The research was supported by the James S. McDonnell Foundation and the National Science Foundation.

A federal judge ordered two attorneys to settle their dispute by using the children's playground game \"rock, paper, scissors.\" The ruling yesterday by Judge Gregory Presnell of the U.S. District Court in Orlando, Fla., stated that he was so dissatisfied with the case's \"latest in a series of Gordian knots\" that he is fashioning \"a new form of alternative dispute resolution.\"

\"When someone uses rock, paper, scissors to adjudicate any kind of dispute that is a positive moment for the world,\" said Matti Leshem, co-commissioner for the USA Rock Paper Scissors League.Leshem says that he does have some concerns about the rules they will use. He wants to know the number of pumps before the throw or if \"illegal\" throws will be allowed. To make sure official USARPS rules are followed, Lesham said he and his staff are willing to fly down to Florida to oversee the match. ff782bc1db

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