Thèse 3e cycle--Lettres--Paris X, 1979. / Bibliogr. p. 185-196. Thèse soutenue sous le titre : "Le Personnage d'Ellénore dans l'Adolphe de Constant"

Thèse--Lettres--Paris IV, 1972. / Bibliogr. p. 583-606. Index.

Thèse--Lettres--Lausanne. / Bibliogr. p. 383-405. Index. Bibliogr. p. 675-681. Index.

Texte remanié de : Dissertation : Littérature française : Universität Bonn : 1983. / Bibliogr. p. 384-409. Notes bibliogr. Index.

Inaug.-diss.--München. / Lebenslauf. "Literaturverzeichnis": [3] p. at end.

Th.--Faculté de droit--Lausanne, 1928.

Thesis (Ph. D.)--University of France.

Thesis (M.A.)--Boston University / PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you. / In this dissertation we report the variation of the Curie constant with dilution of the chromium ion in potassium chromium alum at temperatures between 1.1°K. and 4.2° K. We grew several samples of mixed crystals of potassium chrome alum with potassium aluminum alum, each vrith a different concentration of the chromium ion. Samples of undiluted potassium chromium alum and pure potassium aluminum alum were grown also. The magnetic susceptibilities of the samples were measured at temperatures in the helium range. The percentage of chromium ions in each sample was determined by density comparison. We found that each sample followed the Curie law very closely and thus each Curie constant was well defined. The Curie constant for each sample was directly proportional to the quantity of the chromium ion contained. This linear relationship precludes the possibility of interaction between the paramagnetic ions since a magnetic interaction would involve a curve of higher order. / 2031-01-01

Precision cosmology challenges many aspects of fundamental physics. In particular, quasar absorption lines test the assumed constancy of fundamental constants over cosmological time-scales and distances. Until recently, the most reliable technique was the alkali doublet (AD) method where the measured doublet separation probes variations in the fine-structure constant, ???? e2/??c. However, the recently introduced many-multiplet (MM) method provides several advantages, including a demonstrated ???10-fold precision gain. This thesis presents detailed MM analyses of 3 independent Keck/HIRES samples containing 128 absorption systems with 0.2 &gt zabs &gt 3.7. We find 5.6 ?? statistical evidence for a smaller ?? in the absorption clouds: ????/?? = (-0.574 ?? 0.102) x 10-5. All three samples separately yield consistent, significant ????/??. The data marginally prefer constant d??/dt rather than constant ????/??. The two-point correlation function for ?? and the angular distribution of ????/?? give no evidence for spatial variations. We also analyse 21 Keck/HIRES Si iv doublets, obtaining a 3-fold relative precision gain over previous AD studies: ????/?? = (-0.5 ?? 1.3) x 10-5 for 2.0 &gt zabs &gt 3.1. Our statistical evidence for varying ?? requires careful consideration of systematic errors. Modelling demonstrates that atmospheric dispersion is potentially important. However, the quasar spectra suggest a negligible effect on ????/??. Cosmological variation in Mg isotopic abundances may affect ????/?? at zabs &gt 1.8. Galactic observations and theory suggest diminished 25;26Mg abundances in the low metallicity quasar absorbers. Removing 25;26Mg isotopes yields more negative ????/?? values. Overall, known systematic errors can not explain our results. We also constrain variations in y ?? ?? 2gp, comparing H i 21-cm and millimetrewave molecular absorption in 2 systems. Fitting both the H i and molecular lines yields the tightest, most reliable current constraints: ??y/y = (-0.20??0.44)x10-5 and (-0.16??0.54)x10-5 at zabs = 0.2467 and 0.6847 respectively. Possible line-ofsight velocity differences between the H i and molecular absorbing regions dominate these 1 ?? errors. A larger sample of mm/H i comparisons is required to reliably quantify this uncertainty and provide a potentially crucial check on the MM result.

Proefschrift--Universiteit van Amsterdam, 2003. / Bibliogr. p. 316-327. Résumé en anglais.