Pounds per square inch.

This psi has been added to let you know that it has nothing to do with the Greek psi (Ψ, ψ).

1. A program involving the detection or measurement of electromagnetic radiation: ARM is applied in particular to devices used to measure infrared radiation.
2. Research including the detection of microwave thermal radiation and similar weak wide-band signals that resemble noise and are obscured by receiver noise: The primary atmospheric radiation measurement application using an atmospheric radiometer has been on board spacecraft measuring atmospheric and terrestrial radiation, and they are mostly used for meteorological or oceanographic remote-sensing.

Their secondary application is also meteorological, as zenith-pointing surface instruments that view the Earth's atmosphere in a region above the stationary instrument.

By understanding the physical processes associated with energy emission at these wavelengths, scientists can calculate a variety of surface and atmospheric parameters from these measurements, including air temperature, sea surface temperature, salinity, soil moisture, sea ice, precipitation, the total amount of water vapor and the total amount of liquid water in the atmospheric column directly above or below the instrument.

The measurement of serum or blood ions; such as, sodium, chloride, and potassium, without prior dilution of the sample: The direct measurement of electrolytes is considered to be more nearly accurate than analysis by indirect methods because it is not susceptible to error in cases of hyperlipidemia or excess lipids (fatty, greasy, oily, and waxy compounds) in the blood.

The measurement of the integral (entire, complete), with respect to time, of the power in an electric circuit.

For many years, the term power, in association with electricity, has tended to lose its true meaning; so, power is often found used in nontechnical literature where actually the correct term energy should be used.

By definition, power is the rate at which energy is transformed or is made available and is measured in watthours.

From an economic viewpoint, the most important of all electrical measurements is the measurement of energy. The watthour meter in various forms can be found in nearly every home, factory, highway billboard, and other locations where electrical energy is being purchased.

Metering, installation and wiring have been governed by national, industrial, and local codes for so many years that, at least in the United States, a particular type of installation is nearly identical everywhere in the country.

Measurement of energy is almost always with a "fixed-installation metering". This provides safety because of the grounding of the meter enclosure and ease of reading as a result of a proper location and mounting.

Tamper-proof housing, which are also weatherproof where necessary, are typical structures that normally insure the integrity of the electric meter readings.

The measurement of any of the many quantities with which electricity is characterized.

An application of various procedures for determining the time for an operator to perform a task satisfactorily while using a standard method in the usual environmental conditions; for example, time study or work sampling.

The measurement of serum ions; such as, sodium, chloride, and potassium, which employs a sample diluted prior to analysis.

This method tends to result in errors in cases of hyperlipidemia or elevated concentrations of any or all of the lipids; such as, fatty, greasy, oily, and waxy compounds in the blood.