Duplicated unit

[jmkeil]

Using a comparison of unit ontologies with ABECTO I became aware of the following unmarked duplicate:

• [ ] http://www.ontology-of-units-of-measure.org/resource/om-2/abampere = http://www.ontology-of-units-of-measure.org/resource/om-2/biot

[HajoRijgersberg]

Thanks, but this is an issue which is not clear to me yet. It is unclear whether abampere and biot are one and the same unit or two units that are equal in their "value". Both are expressed in SI unit ampere, with the same value of course. What do you think of this?

[dr-shorthair]

https://en.wikipedia.org/wiki/Abampere

[HajoRijgersberg]

Thanks, dr Short Hair! Indeed, Wikipedia regards them as one and the same unit. But other sources don't!

[dr-shorthair]

Can you provide a pointer to a source that doesn't? I can't find any.

[HajoRijgersberg]

A quick google:

• https://www.unitconverters.net/current/abampere-to-biot.htm
• https://www.convertunits.com/from/abampere/to/biot
• https://www.flightpedia.org/convert/1-abampere-to-biot.html
• https://www.inchcalculator.com/convert/abampere-to-biot/
• https://www.unitsconverters.com/en/Biot-To-Abampere/Unittounit-179-180
• and many more.

These are unit convertors. Most of the unit convertors seem to regard abampere and biot as different units that are equal to each other.

[jmkeil]

Can you provide a pointer to a source that doesn't? I can't find any.

This was also my reason to report it this way. However, both (Wikipedia without source / some arbitrary online converters) are not the strongest arguments.

To have some literature, Google Books provides, among other things, this:

• https://books.google.de/books?id=CrmuSiCFyikC&q=biot+abampere
• https://books.google.de/books?id=BuQNAQAAIAAJ&q=biot+abampere
• https://books.google.de/books?id=x6snAQAAMAAJ&q=biot+abampere

• https://books.google.de/books?id=GaY1AAAAIAAJ&q=biot+abampere = https://pubs.usgs.gov/bul/1418/report.pdf, Page 14

  This [CGS-emu] system is identical with the four-quantity CGS electromagnetic (CGSm) system. The biot of current in the CGSm system is defined as the abampere of current in the CGS-emu system.

  Following, they are equivalent, but the question of identity breaks down to the question, if the systems of units CGSm and CGS-emu are considered as identical.

[HajoRijgersberg]

Agreed, these unit convertors are not the strongest arguments. Thanks for your refs! The sources state that abampere and biot are even equal to a third unit, the franklin, but that's strange because the franklin is a unit of electric charge, not electric current. B.t.w., the franklin is equal to the statcoulomb. Indeed, the biot and abampere are in different systems of units. Thanks for diving into this! It was also already stated in OM (but it was not on the top of my head anymore - sorry for that!)