Jan Gyllenbok | |
|---|---|
 Jan Gyllenbok in 2022 (Photo: Bill Hansen) | |
| Born | November 12, 1963 Lund, Sweden |
| Occupation | Metrologist |
| Nationality | Swedish |
Jan Gyllenbok (born 12 November 1963) is a Swedish author and expert on historical metrology with an academic background in engineering and computer science. He is known for his encyclopedia on historical systems of measurement units. [1]
The dyne is a derived unit of force specified in the centimetre–gram–second (CGS) system of units, a predecessor of the modern SI.
The statvolt is a unit of voltage and electrical potential used in the CGS-ESU and gaussian systems of units. In terms of its relation to the SI units, one statvolt corresponds to exactly ccgs 10−8 volt, i.e. to 299.792458 volts.
The maxwell is the CGS (centimetre–gram–second) unit of magnetic flux.
The slug is a derived unit of mass in a weight-based system of measures, most notably within the British Imperial measurement system and the United States customary measures system. Systems of measure either define mass and derive a force unit or define a base force and derive a mass unit. A slug is defined as the mass that is accelerated by 1 ft/s2 when a net force of one pound (lbf) is exerted on it.
The langley (Ly) is a unit of heat transmission, especially used to express the rate of solar radiation received by the earth. The unit was proposed by Franz Linke in 1942 and named after Samuel Pierpont Langley (1834–1906) in 1947.
Falgun or Phalgun or Phagun is the eleventh month of the year in the Bengali calendar, the Assamese calendar, and the Nepali calendar. In the revision of the Bengali calendar used in Bangladesh since October 2019, the month has 29 days in common years or 30 in leap years of the Gregorian calendar. In the previous version of the calendar, used in Bangladesh from 1987 through October 2019, Falgun had 30 days in common years or 31 days in leap years. The month has 29 or 30 days, based on the true movements of the Sun, in the old non-reformed Bengali calendar, still used in West Bengal, and in the Nepali calendar.
The abampere (abA), also called the biot (Bi) after Jean-Baptiste Biot, is the derived electromagnetic unit of electric current in the emu-cgs system of units. One abampere corresponds to ten amperes in the SI system of units. An abampere of current in a circular path of one centimeter radius produces a magnetic field of 2π oersteds at the center of the circle.
Dimensional metrology is the science of using physical measurement equipment to quantify the physical size, form, characteristics, and relational distance from any given feature.
A pau was a customary unit of capacity used in Brunei, Malaysia, Sabah, and Sarawak. A pau was 2 imperial gills.
The abvolt (abV) is the unit of potential difference in the CGS-EMU system of units. It corresponds to 10−8 volt in the SI system and 1/ccgs statvolt ≈ 3.3356×10−11 statvolt in the CGS-ESU system.
Niue, a country in free association with New Zealand, uses only one official legal tender currency, which is the New Zealand dollar.
Ronald Edward Zupko was an authority on historical metrology with an academic background in medieval history. He was known for his books on the history of weights and measures, and had written numerous dictionary and encyclopedia entries on historical measurement units.
The statampere (statA) is the derived electromagnetic unit of electric current in the CGS-ESU and Gaussian systems of units.:278 One statampere corresponds to 10/ccgs ampere ≈ 3.33564×10−10 ampere in the SI system of units.
Historical metrology is the science that is dealing with the fundamental units of measurement, systems of units formerly in use in various countries, and the development of monetary units throughout their history.
Dutch cask is a UK unit of weight for butter and cheese.
Aum was a UK unit for hock; it was between 30 and 32 gallons.
Stuck was a form occasionally found in English writing as a corruption of the German "Stück", itself an abbreviation of Stückfass, referring to the volume of a wine cask of around 1000-1200 litres. It was normally used in reference to German wine production.
Ship load is a United Kingdom unit of weight for coal equal to 20 keels or 949,760 pounds (430,800 kg).
The duplone was a currency used in various Swiss cantons in the late 1700s and early 1800s. Although there is a wide range of conversions due to the differing sizes and gold contents of different canton's duplones, 1 duplone is generally equal to 16 franken. This conversion is exact in both the cantons of Graubünden and Berne. Duplones had a consistent gold fineness of 0.900 across Switzerland.
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