Texte remanié de: Thesis--Oxford, 1998. / Bibliogr. p. 297-325.

Texte remanié de: Doctoral thesis--Australian catholic university, 1999. Titre de soutenance : A critical edition of Anastasius Bibliothecarius' s latin translation of documents pertaining to the life of Maximus the Confessor. / Contient le texte latin avec traduction anglaise en regard de textes d'Anastase le Bibliothécaire. Bibliogr. p. 305-313.

Texte remanié de: Ph. D.--Hamilton (Ont.)--McMaster University, 1988. Titre de soutenance : Priscian's De laude Anastasii imperatoris. / Contient le texte original latin suivi de sa trad. anglaise, introd. et comment. en anglais. Bibliogr. p. 215-236.

Lʼobjectif de cette étude est de saisir le but dʼun discours hagiographique, en fondant lʼanalyse sur la tradition, lʼauteur, le style et le public de certains textes de l'Antiquité tardive. Les auteurs de ces textes, écrits en prose grecque et illustrés par lʼÉloge de Saint Anastase de Georges de Pisidie, suivaient les préceptes de la rhétorique et réélaboraient les canons de la littérature hagiographique. La thèse est divisée en cinq chapitres. Le premier trace une histoire de la réécriture et montre lʼévolution de la technique paraphrastique entre le sixième et le septième siècle après J.-C. Lʼanalyse se prolonge jusqu'aux soixante-dix Miracles de Cyr et Jean par Sophrone de Jérusalem et à lʼÉloge de Saint Anastase par Georges de Pisidie, une métaphrase des actes du martyre, dont le but était de propager les victoires de lʼEmpire chrétien contre la Perse. Dès le deuxième chapitre, lʼattention se concentre uniquement sur lʼÉloge, dont une première traduction italienne est proposée. Le troisième chapitre traite de la diffusion du culte de Saint Anastase après son martyre, advenu le 22 janvier 628 après J.-C. Le quatrième chapitre se focalise sur la technique utilisée par Georges pour réécrire les actes du martyre de Saint Anastase. Le dernier chapitre analyse la structure de lʼÉloge, en essayant de montrer les points où la prose de Georges suit les préceptes de la rhétorique ancienne tardive. Ce travail espère ainsi souligner lʼimportance de lʼÉloge dans la production panégyrique de Georges, dans le contexte de lʼhistoire littéraire du septième siècle après J.-C. et, plus généralement, de lʼAntiquité tardive. / The aim of the thesis is to understand the purpose of an hagiographic discourse, basing the analysis on the tradition, the author, the style and the public of certain texts. These texts (exemplified by the Encomium of Saint Anastasius by George of Pisidia) were written in Greek prose during the period of Late Antiquity and Early Byzantium. Their authors increasingly tended to follow the precepts of rhetoric and to rework the canons of hagiographic literature. The thesis is divided into five chapters. The first traces the history of rewriting and shows the evolution of the paraphrastic technique between the sixth and seventh centuries AD. The analysis extends up to the seventy Miracles of Cyrus and John by Sophronius of Jerusalem and to the Encomium of Saint Anastasius by George of Pisidia, a metaphrase of the acts of martyrdom, whose aim was to propagate the victories of the Christian Empire against Persia. From the second chapter, the attention is focused only on the Encomium, of which is offered a first Italian translation. The third chapter is a discussion on the spread of the cult of Saint Anastasius, after his martyrdom on January 22, 628 AD. The fourth chapter focuses on the technique used by George to rewrite the acts of the martyrdom of Saint Anastasius. The last chapter analyzes the structure of the Encomium, trying to highlight the points where the prose of George seems to follow more closely the dictates of late antique rhetoric. It is hoped with this to emphasize the importance of a text as the Encomium, within the panegyric production of George of Pisidia, but also the literary history of the seventh century AD and, more generally, of Late Antiquity.

PhD (Physics) / Department of Physics / Dye sensitized solar cells (DSSCs) have attracted rapid interest over the recent years with prospect of emerging as a viable alternative to conventional silicon based solar cells. The photoanode of DSSCs comprises of dye molecules anchored to the surface of semiconductors such as TiO2. However, the major drawback of Titanium dioxide (TiO2) is its wide band gap (3.0 eV to 3.2 eV) which limits its photocatalytic activities to the ultraviolet region of the electromagnetic spectrum. Understanding the interaction of dye molecules with the surfaces of TiO2 is crucial for optimizing light-harvesting, photoconversion function and photocurrent densities in DSSCs. The three polymorphs of TiO2 are anatase, brookite and rutile. The optical properties of brookite semiconductor have not been much studied although brookite has been reported to have good photocatalytic properties. In this work, Density functional theory (DFT) computational approach was used through various computational softwares which are CASTEP, GAUSSIAN, GAUSSUM, GPAW, ASE, and AVOGADRO with B3LYP, LANL2DZ, PBE, and GGA functional to explore the photocatalytic properties of the typical ruthenium N3 complex, polyenediphenyl-aniline dye moiety, croconate dye molecules and three modelled surfaces of brookite which are (TiO2)5, (TiO2)8 and (TiO2) 68 for application in DSSCs. We also studied the absorption of the corresponding dye molecules on the three surfaces of brookite TiO2. Our findings showed strong binding ability, good electronic coupling, efficient charge separation, spontaneous electron injection and good spectral properties upon adsorption of the dye molecules to brookite TiO2 semiconductor clusters. Our findings on the optical absorption spectra of ruthenium N3 dye, croconate dye and polyenediphenyl-aniline dye molecule absorbed on (TiO2)5 and (TiO2)8 brookite cluster shows bathocromatic shift of the absorption maxima to higher wavelength and improve optical response of TiO2 brookite cluster. A red spectra shift and absorption over a wide range of the solar spectrum in the visible and near infra-red region of the solar spectrum was achieved upon absorption of the ruthenium N3 complex and polyenediphenyl-aniline dye molecules on (TiO2)5 and (TiO2)8 brookite cluster. The results generally suggest that the absorption of dye molecules on TiO2 brookite cluster improves its spectra responsivity in the UV region and makes it possible to absorb over the whole spectrum range, that is, the UV, visible and near infra – red region of the solar spectrum. Our findings also showed good electron injection kinetics from the dye to TiO2 brookite clusters, which suggests higher photocurrents density and open circuit voltage in DSSCs. / NRF