Les Modèles Astronomiques de Claude Ptolemée et Théon de Smyrne
DEA (i.e. MPhil) Thesis – Paris 7 University (“Denis Diderot”) – 2001
Advisor: Dr. Régis Morelon
This work aims to assess the originality of Claudius Ptolemy’s contribution to astronomy. This is done by comparing the astronomical models developed by Ptolemy (ca 150s AD) with those described by the earlier astronomer Theon of Smyrna (probably early 2nd century AD).
French (original)
Comparison of the Astronomical Models of Claudius Ptolemy and Theon of Smyrna
English Translation
Below is a rough English translation done with DeepL, still largely unedited as of July_31_2025 .
I trust that readers understand that this has to be used with caution!
If you would like to discuss the translation accuracy of certain passages – or anything else relating to the content, for that matter – do not hesitate to contact me.
L’Emergence de l’Analyse Dimensionnelle – L’analyse dimensionnelle en France et en Grande-Bretagne au XIXe siècle
PhD Thesis – Paris 7 University (“Denis Diderot”) – 2010
Advisor: Dr. Olivier Darrigol
Dimensional analysis was developed in the 19th c. It can be viewed as a reformulation of the principle of homogeneity following the emergence of numerical equations, implying a redefinition of the concept of dimension. The principle of homogeneity holds that some operations can only be performed on quantities of a similar nature, where dimensions define the latter. Instead, Fourier substituted rules which ensure that equations remain invariant under a change of units, and identified dimensions with the power to which conversion factors of derived units must be raised when
a fundamental unit is changed. To what extent this new definition of “dimension” concurs with the former is not obvious, and tension between the two conceptions motivated much of the debates regarding dimensional analysis throughout the 19th c.
French (original)
has been published (Ref ANRT: 61493) and can be bought from the link below:
The Emergence of Dimensional Analysis –
Dimensional Analysis in France and Great Britain in the 19th c.
Below is a rough English translation done with DeepL, still largely unedited as of Jun_05_2025 .
I trust that readers understand that this has to be used with caution!
If you would like to discuss the translation accuracy of certain passages – or anything else relating to the content, for that matter – do not hesitate to contact me.
The dimensions of the magnetic pole: a controversy at the heart of early dimensional analysis
Publication – Archive for History of Exact Sciences, 70: 293 – 2016
Paper based on the above PhD Thesis.
English (original)
Full-text is available to view and download at the link below
(download option is under “more” to the right “share”):
Les Dimensions du Pole Magnetique : Une Controverse au Coeur de l’Analyse Dimensionnelle a ses Debuts
Traduction Francaise
Vous trouverez ci-dessous une traduction approximative en anglais réalisée à l’aide de DeepL, encore largement non révisée à la date du 31 juillet 2025.
Je remercie les lecteurs de bien vouloir utiliser cette traduction avec prudence.
Si vous souhaitez discuter de la précision de la traduction de certains passages, ou de tout autre aspect lié au contenu, n’hésitez pas à me contacter.
Qualitative vs Quantitative Conceptions of Homogeneity in Nineteenth Century Dimensional Analysis
Publication – Annals of Science, Volume 74, Issue 4 – 2017
Paper based on the above PhD Thesis.
English (original)
Conceptions Qualitative et Quantitative de l’Homogeneite dans l’Analyse Dimensionnelle au XIX siecle
Traduction Francaise
Vous trouverez ci-dessous une traduction approximative en anglais réalisée à l’aide de DeepL, encore largement non révisée à la date du 31 juillet 2025.
Je remercie les lecteurs de bien vouloir utiliser cette traduction avec prudence.
Si vous souhaitez discuter de la précision de la traduction de certains passages, ou de tout autre aspect lié au contenu, n’hésitez pas à me contacter.