Giovanni Giorgi

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For the Italian priest and composer, see Giovanni Giorgi (composer).
Giovanni Giorgi
University of Rome
ProjectsGiorgi system of measurement

Giovanni Giorgi (November 27, 1871 – August 19, 1950) was an Italian physicist and electrical engineer who proposed the Giorgi system of measurement, the precursor to the International System of Units (SI).

Early life

Giovanni Giorgi was born in Lucca on November 27, 1871.

Career

Giorgi studied

University of Rome between 1913 and 1939. During World War II he moved to Ferentino. He was an Invited Speaker of the ICM in 1924 in Toronto,[1]
in 1928 in Bologna, and in 1932 in Zurich.

Personal life

He was engaged to Laura Pisati, his former master's student who became the first woman invited to deliver a lecture at the fourth International Congress of Mathematicians (ICM), but she died in 1908 shortly before both her talk and their intended wedding.[2]

Death

Giorgi died on August 19, 1950, in Castiglioncello, Livorno at the age of 78.[3]

The Giorgi system

Toward the end of the 19th century, after

MKS system (which used the metre, kilogram and second as its base units) should be extended with a fourth unit to be chosen from the units of electromagnetism, solving also the presence of the irrational coefficients.[4][5][6][7]

In 1935 this was adopted by the

International Committee for Weights and Measures (CIPM) approved a proposal to use the ampere as that unit in a four-dimensional system, the MKSA system.[9]

The Giorgi system was thus the precursor of the International System of Units (SI) adopted in 1960, which was based on six base units: metre, kilogram, second, ampere, kelvin, and candela.[9] The mole was added as a seventh base unit in 1971.[10]

Works

  • Compendio delle lezioni di meccanica razionale (in Italian). Roma: Sampaolesi. 1928.
  • Lezioni di fisica matematica (in Italian). Roma: Sampaolesi. 1928.

Notes

  1. ^ Giorgi, Giovanni. "On the functional dependence of physical variables". In: Proceedings of the International Congress of Mathematicians in Toronto, August 11–16. 1924. Vol. 2. pp. 31–56.
  2. S2CID 70349983
    .
  3. S2CID 239840507
    . Retrieved May 21, 2021.
  4. OL 18571144M
  5. ^ Giovanni Giorgi (1902), Rational Units of Electromagnetism. Original manuscript with handwritten notes by Oliver Heaviside
  6. doi:10.1109/LMAG.2018.2859658
  7. ^ F. Frezza; S. Maddio; G. Pelosi; S. Selleri (2015), "The Life and Work of Giovanni Giorgi: The Rationalization of the International System of Units", IEEE Antennas Propag. Mag., 57 (6): 152–165,
    S2CID 42813124
  8. PMID 16577693
  9. ^
    ISBN 978-92-822-2272-0
  10. ^ National Institute of Standards and Technology, Brief history of the SI, retrieved 2015-01-15

References

  1. International Electrotechnical Commission. "IEC Historical Figures - Giovanni Giorgi". Retrieved 2014-02-21.
  2. Giovanni Giorgi (1905), "Proposals Concerning Electrical and Physical Units", Transactions of the International Electrical Congress, St. Louis, 1904, Albany, N.Y., J.B. Lyon Company: 136–141,
    OCLC 3395740
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