In Bisync, the NAK is used to indicate that a was detected in the previously received and that the receiver is ready to accept of that block. Bisync does not use a single ACK character, but has two control sequences for alternate even/odd block acknowledgement.
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A prototype set of tutorials, developed by Prof. Tilbury, won an Undergraduate Computational Science Award from the U.S. Department of Energy, and the first set of Control Tutorials for MATLAB won the Educom Medal.
The Second Amendment to the Constitution, as passed by Congress in 1791, declares that “a well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.” Today the interpretation of this phrase is widely debated. One side argues that the right to own a gun is equivalent to the broader right of self-defense, and that individuals should be allowed to keep them on hand for protection. Another side argues that when this amendment was written, it was with the purpose of creating a standing army, much like Switzerland today. But they argue that since the U.S. has a powerful army to counter outside forces, and a functioning internal police force, the original intent has disappeared and the personal right to bear arms is no longer necessary or even desirable. So far the courts have continually ruled in favor of the first argument.