The exact cause of Erdheim-Chester disease (ECD) is unknown. However, the disease is thought to represent an abnormal inflammatory process characterized by excessive proliferation and accumulation of certain cells, with associated scarring or overgrowth of fibrous connective tissue (fibrosis).
humidity (relative and absolute) The amount of water vapor in the air. Humidity is measured in two ways: (1) Absolute humidity is the percentage of water vapor actually present in the air. (2) Relative humidity is the absolute humidity divided by the amount of water that could be present in the air. Relative humidity indicates the degree of comfort or discomfort one feels from the humidity, because it indicates the amount of perspiration that can evaporate from the skin.
Difference between Temperature and Humidity. â¢ Temperature is a measure of heat whereas humidity is a measure of the amount of water vapor present in air. â¢ Temperature of air is governed by solar radiation and higher solar energy means higher temperature of air.here is another concept called relative humidity which is a percentage of the actual amount of water vapor present in air to what air can hold at that temperature in theory. Hygrometers are used to measure humidity present in air. Let us see how humidity affects us in summers.