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From: AdaMagica <christ-usch.grein@t-online.de>
Subject: Re: ANN: Units of measurement for Ada v3.12 (New SI prefixes)
Date: Wed, 30 Nov 2022 07:44:13 -0800 (PST)	[thread overview]
Message-ID: <34d8c2dc-c989-4757-9a85-acc641681426n@googlegroups.com> (raw)
In-Reply-To: <tlu2vc$flm$1@gioia.aioe.org>

This is a bit confusting. From
https://www.lne.fr/en/news/general-conference-weights-and-measures-2022:

to express quantities of digital information using orders of magnitude in excess of 1024, has been adopted.

Thus, four new prefixes have been introduced:

    ronna pour 1027
    ronto pour 10-27
    quetta pour 1030
    quecto pour 10-30
End quote.

Abbreviations?
What does the reference to 1024 mean? Does it mean power of ten prefixes (negative  powers)? The what relevance has 1024? If it's binary units, negative powers are nonsense.

From
https://physics.nist.gov/cuu/Units/prefixes.html:

Because the SI prefixes strictly represent powers of 10, they should not be used to represent powers of 2. Thus, one kilobit, or 1 kb a it, is 1000 bit and not 210 bit = 1024 bit. To alleviate this ambiguity, prefixes for binary multiples have been adopted by the International Electrotechnical Commission (IEC) for use in information technology.
End quote.

You can find the binary prefixes in:
https://physics.nist.gov/cuu/Units/binary.html

There is not yet a word to be found about the above prefixes.

  reply	other threads:[~2022-11-30 15:44 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-26 22:11 ANN: Units of measurement for Ada v3.12 (New SI prefixes) Dmitry A. Kazakov
2022-11-30 15:44 ` AdaMagica [this message]
2022-11-30 17:03   ` Dmitry A. Kazakov
2022-11-30 17:17   ` AdaMagica
2022-11-30 17:49     ` AdaMagica
2022-11-30 17:18   ` Jeffrey R.Carter
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