Browse Reference Articles
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Mobile phone
A mobile phone or cell phone is an electronic telecommunications device with the same basic capability as a conventional fixed-line telephone, but which is also entirely portable and is not required ... > more -
Solar wind
A solar wind is a stream of charged particles (i.e., a plasma) which are ejected from the upper atmosphere of a star. When originating from stars other than the Earth's Sun, it is sometimes called a ... > more -
Automobile emissions control
Automobile emissions control covers all the technologies that are employed to reduce the air pollution-causing emissions produced by ... > more -
Global Positioning System
The Global Positioning System, usually called GPS, is the Earth's only fully-functional satellite navigation system. A constellation of more than two dozen GPS satellites broadcasts precise timing ... > more -
Metallurgy
Metallurgy is a domain of materials science and of materials engineering that studies the physical and chemical behavior of metallic elements and their mixtures, which are called ... > more -
Graph drawing
As a branch of graph theory, Graph drawing applies topology and geometry to derive two- and three-dimensional representations of graphs. Graph drawing is motivated by applications such as VLSI ... > more -
Photoelectric effect
The photoelectric effect is the emission of electrons from matter upon the absorption of electromagnetic radiation, such as ultraviolet radiation or x-rays. Upon exposing a metallic surface to ... > more
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