Knee meniscus tear A meniscus tear, damage to a piece of cartilage in the knee, causes pain and swelling. Cellulitis Cellulitis, a bacterial infection of the skin, causes red, tender skin that is usually swollen and warm. Insect bites Redness, swelling, pain, itching, bumps are common symptoms of insect bites.
|. International Standard Atmosphere (ISA) is a model used for the standardization of aircraft instruments. It was established, with tables of values over a range of altitudes, to provide a common reference for temperature and pressure. Flying in ISA-plus temperatures will have a negative impact on aircraft performance.
The standard atmosphere (symbol: atm) is a unit of pressure defined as 101325 Pa (1.01325 bar).It is sometimes used as a reference or standard pressure.or example, a partial pressure of oxygen is calibrated typically using air at sea level, so is expressed in units of atm. The old European unit technical atmosphere (at) is equal to 1 kilogram-force per square centimetre (kgf/cm 2), 7004980665000000000â 98066.5 Pa.