Ampere

The ampere, often shortened to amp, is the SI base unit of electric current, named after French mathematician and physicist André-Marie Ampère (1775–1836), considered the father of electromagnetism along with Danish physicist Hans Christian Ørsted.

Kilogram

The kilogram is the base unit of mass in the International System of Units (SI), the metric system, having the unit symbol kg. It is a widely used measure in science, engineering and commerce worldwide, and is often simply called a kilo colloquially. It

Coulomb

The coulomb (symbol: C) is the SI derived unit of electric charge. Historically, it was defined as the charge delivered by an electric current of one ampere in one second, with the ampere being defined as the current needed to generate a magnetic force of

Candela

The candela is the base unit of luminous intensity in the International System of Units (SI); that is, luminous power per unit solid angle emitted by a point light source in a particular direction. Luminous intensity is analogous to radiant intensity, but

Kelvin

The kelvin, symbol K, is the SI base unit of temperature, named after the Belfast-born and University of Glasgow based engineer and physicist William Thomson, 1st Baron Kelvin (1824–1907). The Kelvin scale is an absolute thermodynamic temperature scale

Zero-order hold

The zero-order hold (ZOH) is a mathematical model of the practical signal reconstruction done by a conventional digital-to-analog converter (DAC). That is, it describes the effect of converting a discrete-time signal to a continuous-time signal by holding

Second

The second is the base unit of time in the International System of Units (SI), commonly understood and historically defined as 1⁄86400 of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to

Einstein (unit)

The einstein (symbol E) is a unit defined as the energy in one mole of photons (6.022×1023 photons). Because energy is inversely proportional to wavelength, the unit is frequency dependent. This unit is not part of the International System of Units (SI

Gray (unit)

The gray is a derived unit of ionizing radiation dose in the International System of Units (SI). It is defined as the absorption of one joule of radiation energy per kilogram of matter

Metrication Board

The Metrication Board was a non-departmental public body that existed in the United Kingdom to promote and co-ordinate metrication within the country. It was set up in 1969, four years after the metrication programme was announced, and wound down in 1981

Nduai Kabait rebellion

The Nduai Kabait Rebellion was an anti-Vietnamese Cham revolt led by Nduai Kabait, took place in 1826 in Central Vietnam against the court of Po Klan Thu, the ruling Cham king who was considered being manipulated by the Vietnamese ruler Minh Mang, and