Column sample

In statistics, a group of observations selected from a statistical population by a set procedure. Samples may be selected at random or systematically. The sample is taken in an ...

sample

Sociology; General sociology

Individuals chosen to represent the population in a research study.

sample

Labor; Labor statistics

A subset of a universe; usually selected randomly and considered representative of the universe.

lignite

Energy; Coal

Lignite is a soft brown type of coal, with characteristics that places it somewhere between hard coal and peat. Lignite has a lower energy content and different characteristics ...

zechstein

Energy; Coal

Formations containing salt that were laid down in the second part of the Permian Period, the salt has risen up under or through the overlying formations in many places, producing ...

coal measures

Energy; Coal

The various strata which contain seams of coal.

Tavan Tolgoi

Energy; Coal

Situated at South Gobi desert in Mongolia, Tavan Tolgoi is the world's largest untapped coking coal reserve with an estimated deposit of 6 billion metric tons of steelmaking coal. ...

ethanol 95 (E95)

Energy (non-renewable); Coal; Natural gas; Petrol

A fuel containing a mixture of 95 percent ethanol and 5 percent gasoline

acid deposition

Energy; Coal

Refers to both wet deposition and dry deposition. Both occur as a result of ammonium, carbon, nitrogen, and sulfur mixing with water molecules to create a higher acidity than the ...

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Industry/Domain: Security & Category: Alarm systems

DNA spray system

A security system that is activated when a trigger sets off a device. This device contains a liquid that releases a synthetic DNA-laced spray, which ...