Cryogenics Cryogenics In physics, cryogenics is the production and behaviour of materials at very low temperatures. A person who studies elements that have been subjected to extremely cold temperatures is called a "cryogenicist". It is not well-defined at what point on the temperature scale refrigeration ends and cryogenics begins, but scientists assume a gas to be cryogenic if it can be liquefied at or below . The U.S. National Institute of Standards and Technology has chosen to consider the field of cryogenics as that involving temperatures below . This is a logical dividing line, since the normal boiling points of the
Doctrine of the Mean contrary to the course of the Mean." This guideline requires self-education, self-questioning and self-discipline during the process of self-cultivation. This principle was demonstrated in the first chapter of "Doctrine of the Mean": "The superior man does not wait till he sees things to be cautious, nor till he hears things to be apprehensive. There is nothing more visible than what is secret, and nothing more manifest than what is minute. Therefore the superior man is watchful over himself, when he is alone." This guideline requires understanding, concern and tolerance towards one another. Leniency was demonstrated in the 13th chapter: "When