1. The act of insulating for the purposes of protecting something.
2. The state of being insulated; SYN. insularity, insularism, detachment.
Process or material that prevents or reduces the flow of electricity, heat or sound from one place to another.
Electrical insulation makes use of materials such as rubber, pvc, and porcelain, which do not conduct electricity, to prevent a current from leaking from one conductor to another or down to the ground. Insulation is a vital safety measure that prevents electric currents from being conducted through people and causing electric shock.
Double insulation is a method of constructing electrical appliances that provides extra protection from electric shock, and renders the use of an earth wire unnecessary. In addition to the usual cable insulation, an appliance that meets the double insulation standard is totally enclosed in an insulating plastic body or structure so that there is no direct connection between any external metal parts and the internal electrical components. U thermal or heat insulation makes use of insulating materials such as fiberglass to reduce the loss of heat through the roof and walls of buildings. The U-value of a material is a measure of its ability to conduct heat—a material chosen as an insulator should therefore have a low U-value. Air trapped between the fibers of clothes acts as a thermal insulator, preventing loss of body warmth.
Sinonimi: closing off
ETYM Cf. French isolation.
1. The act of isolating something; SYN. closing off.
2. A feeling of being disliked and alone.
3. A state of separation between persons or groups.
4. A country's withdrawal from internal politics.
The reduction of the capacity of a system to respond to an external force by use of resilient isolating materials.
In medicine, the segregation of patients to prevent the spread of infection. Today, isolation is most often required for patients who are at unusual risk, mainly those whose immune systems have been undermined by disease or suppressed by antirejection or cytotoxic drugs. Strict isolation is also practiced to prevent infection due to antibiotic-resistant microbes (see nosocomial infection).