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
Only Words (book) anti-trust laws, and sexual harassment speech are all "only words," but they are not constitutionally protected. Likewise, a "White Only" sign is "only words," but it not treated merely as offensive speech but as an act of segregation and discrimination. Pornography, MacKinnon contends, enacts discrimination in exactly the same way. MacKinnon insists that pornography is not what it says, but what it does: "What pornography does, it does in the real world, not only in the mind." She elaborates: MacKinnon proceeds to argue that abuse and coercion need not be present in the production of all pornography in order to