Inaug.-Diss.--Ludwig-Maximilians-Universität, 1989. / Includes bibliographical references (p. 163-187) and index.

Thesis (M. Div.)--St. Vladimir's Orthodox Theological Seminary, 2008. / Abstract. Includes bibliographical references.

Thesis (doctoral)--Panepistēmion Athēnōn, 1977. / Title on added t.p.: Les monastères de Myriokéfala et de Roustica (Crète) et leurs chapelles. Summary in French. Includes bibliographical references (p. [189]-194).

How much damage can a malicious tiny device cause in a single-hopwireless network? Imagine two players, Alice and Bob, who want toexchange information. Collin, a malicious adversary, wants to preventthem from communicating. By broadcasting at the same time as Alice orBob, Collin can destroy their messages or overwhelm them with his ownmalicious data. Being a tiny device, however, Collin can onlybroadcast up to B times. Given that Alice and Bob do not knowB, and cannot distinguish honest from malicious messages, howlong can Collin prevent them from communicating? We show the answerto be 2B + Theta(lg|V|) communication rounds, where V is theset of values that Alice and Bob may transmit. We prove this resultto be optimal by deriving an algorithm that matches our lowerbound---even in the stronger case where Alice and Bob do not start thegame at the same time.We then argue that this specific 3-player game captures the generalextent to which a malicious adversary can disrupt coordination in asingle-hop wireless network. We support this claim by deriving---via reduction from the 3-player game---round complexity lower boundsfor several classical n-player problems: 2B + Theta(lg|V|) for reliable broadcast,2B + Omega(lg(n/k)) for leader election among k contenders,and 2B + Omega(k*lg(|V|/k)) for static k-selection. We then consider an extension of our adversary model that also includes up to t crash failures. We study binary consensus as the archetypal problem for this environment and show a bound of 2B + Theta(t) rounds. We conclude by providing tight, or nearly tight, upper bounds for all four problems. The new upper and lower bounds in this paper represent the first such results for a wireless network in which the adversary has the ability to disrupt communication.

Thesis (M. Div.)--St. Vladimir's Orthodox Theological Seminary, 2008. / Abstract. Includes bibliographical references.

La présente thèse est l’édition critique d’un recueil de figures de style anonyme protobyzantin des Ve-VIe siècles, De figuris orationis (Rhetores Graeci, III, édit. L. Spengel, Leipzig, Teubner, 1856, p. 110-160). L’auteur, un professeur, entreprend pour son élève un recensement des figures hermogéniennes en arguant de l’excellence d’Hermogène. Il s’agit de figures apparaissant aussi dans le Corpus rhetoricum (Corpus rhetoricum, édit. M. Patillon, Paris, Les Belles Lettres, 2008-2014), dans le traité sur l’invention (De inuentione (C. rhet.III1)) du Pseudo-Hermogène et dans le traité sur les catégories stylistiques du discours (Deideis (C. rhet. IV)) d’Hermogène. Le recueil a ensuite été augmenté d’un relevé de figures inhabituelles à partir des scolies de l’Iliade, où se glissent d’autres types de figures et des considérations annexes. Des gloses, d’inspiration chrétienne notamment, ont aussi été insérées en différents endroits de l’ensemble du texte. Cette édition comprend :I. 1) un rappel des opinions émises sur le texte ; 2) sa datation ; 3) un questionnement portant sur son unité ; 4) une étude des principales orientations théoriques dans le domaine des figures ; 5) un examen de la position théorique et pratique de l’auteur du recueil ; 6) l’étude de la tradition manuscrite du texte ; 7) une recherche portant sur les liens entretenus par le texte avec le corpus démosthénien et les Scolies de Démosthène ; 8) une explicitation des principes de l’édition ; 9) quelques observations sur les éditions antérieures ;II. 1) le texte établi et émendé, un apparat (leçons, témoins, sources) ; 2) une traduction en français ; 3) un commentaire continu. / The current thesis consists in the scholarly edition of a collection of anonymous proto-Byzantine stylistic devices, dated from the fifth and sixth centuries. It is entitled De figurisorationis (Rhetores Graeci, III, L. Spengel ed., Leipzig, Teubner, 1856, 110-160). Theirauthor, a Professor convinced of Hermogenes excellence, intended the inventory of theHermogenian devices for a student. These same devices can also be found in the Corpusrhetoricum (Corpus rhetoricum, M. Patillon ed., Paris, Les Belles Lettres, 2008-2014), bothin the treatise devoted to invention (De inuentione (C. rhet. III1)) by the Pseudo-Hermogenesand Hermogenes treatise dedicated to the stylistic categories of the discourse (De ideis (C.rhet. IV)). That collection was then expanded by a census of unusual devices found in theIliad scholia, to which were added some other kind of figures and additional observations.Gloses can also be found in various passages of the text, some of Christian inspiration.The current edition includes:I. 1) A reminder of various opinions on the text; 2) the dating of the text; 3) anexamination of its unity; 4) a study about the main theoretical orientations in the field ofstylistic devices; 5) an analysis of the theoretical and practical position of the author; 6) astudy of the manuscript tradition; 7) an investigation of the links between the text, theDemosthenean corpus and the Demosthenes Scholia; 8) an elucidation of the principlesguiding the current edition; 9) a few observations on prior editions;II. 1) The text established and reviewed, with footnotes (lectures, witnesses, sources); 2)a French translation; 3) a commentary.

Leo VI (886-912) is an emperor who has suffered from a hostile and inadequate press. He has been portrayed as a weak and careless emperor, known mainly for his dubious parentage and marital exploits. This thesis questions these popular perceptions of Leo, and attempts to present a more realistic account of the emperor and the politics of his age. The aspects of the reign tackled focus on essential elements of Leo's life and rule, presented in a rough chronological framework, and the themes of personal relationships and political ideologies are recurrent. Chapter One examines Leo's relationship with Basil I and his attitude to his Macedonian heritage. Chapter Two considers the fate of the monumental figure of Photios at the emperor's hands. Chapter Three deals with the position and role of the 'all powerful' Stylianos Zaoutzes during the first half of the reign. Chapter Four ponders the origin and meaning of Leo's 'wise' epithet. Chapter Five focuses on the emperor's four marriages. Chapter Six turns to the course of foreign affairs during the reign, concentrating on Bulgaria and the Arab navy, and considers the emperor's attitude towards these military problems. Chapter Seven examines the emperor's relationship with his senatorial officials, focusing on two distinct groups, eunuchs and the generals who originated from families of the eastern frontier. Finally Chapter Eight addresses the tense relationship that existed between Leo and his brother and co-emperor Alexander. What emerges from a consideration of these aspects of Leo and his reign is that this is an emperor who does not deserve the popular perceptions that still persist about him. He was an emperor who forged a 'new' and distinctive imperial style, a style that should not deceive us; he may have been literate, sedentary and city-based, but he was also forceful, strong-willed and conscientious.

A partir da minha produção de fotografias da série Paredes, este estudo investiga a representação de paredes brancas e relaciona as imagens produzidas com as reflexões dos teóricos contemporâneos de arte Hanneke Grootenboer, sobre fundos de naturezas-mortas da Holanda seiscentista, e Georges Didi-Huberman, sobre a representação de paredes em alguns afrescos de Fra Angelico. As interpretações de ambos apontam como tais imagens de paredes, usualmente encontradas em fundos pictóricos, podem ser consideradas como áreas onde há a ocorrência de algo que excede a representação. A série Paredes propõe a análise de imagens que qualificamos como rarefeitas e neutras com a intenção de verificar se elas apresentam ou evocam algo diverso da cena fotografada, como o vazio proposto por Grootenboer ou o infinito divino sugerido por Didi-Huberman em imagens similares. Ao utilizar o conceito de “neutro” de Roland Barthes, podemos situar essas imagens, por serem representações de superfícies inexpressivas e sem importância, em um campo de oscilação no qual elas não aderem a nenhuma posição fixa quanto à definição de seu conteúdo. A condição de deriva – inerente ao neutro – que as imagens de parede carregam as tornam potências com capacidade de suscitar quaisquer ideias, inclusive opostas e extraordinárias, como as de vazio e de infinito. / This study is based on my photographic work the Paredes series and investigates the representation of white walls, relating the images to the work of the contemporary art theorists Hanneke Grootenboer and Georges Didi-Huberman, the former reflecting on the backgrounds of 17th-century Dutch still-life painting and the latter considering the representation of walls in some of Fra Angelico’s frescos. Their interpretations indicate how such images of walls usually found in the backgrounds of paintings might be considered as areas where something occurs that goes beyond representation. The Paredes series proposes an analysis of images that we consider neutral or less dense, with the aim of testing whether they present or evoke something other than the photographic scene, such as the void proposed by Grootenboer or the divine infinity suggested by Didi-Huberman in similar images. By employing Roland Barthes’s concept of the “neutral” we might, due to their being representations of inexpressive surfaces of no importance, situate these images in a field of fluctuation, in which they adopt no fixed position in terms of definition of content. The condition of drift – inherent to the neutral – contained in the images of walls, gives them potential to support any idea, including contrasting and exceptional ones such as the void and infinity.

A partir da minha produção de fotografias da série Paredes, este estudo investiga a representação de paredes brancas e relaciona as imagens produzidas com as reflexões dos teóricos contemporâneos de arte Hanneke Grootenboer, sobre fundos de naturezas-mortas da Holanda seiscentista, e Georges Didi-Huberman, sobre a representação de paredes em alguns afrescos de Fra Angelico. As interpretações de ambos apontam como tais imagens de paredes, usualmente encontradas em fundos pictóricos, podem ser consideradas como áreas onde há a ocorrência de algo que excede a representação. A série Paredes propõe a análise de imagens que qualificamos como rarefeitas e neutras com a intenção de verificar se elas apresentam ou evocam algo diverso da cena fotografada, como o vazio proposto por Grootenboer ou o infinito divino sugerido por Didi-Huberman em imagens similares. Ao utilizar o conceito de “neutro” de Roland Barthes, podemos situar essas imagens, por serem representações de superfícies inexpressivas e sem importância, em um campo de oscilação no qual elas não aderem a nenhuma posição fixa quanto à definição de seu conteúdo. A condição de deriva – inerente ao neutro – que as imagens de parede carregam as tornam potências com capacidade de suscitar quaisquer ideias, inclusive opostas e extraordinárias, como as de vazio e de infinito. / This study is based on my photographic work the Paredes series and investigates the representation of white walls, relating the images to the work of the contemporary art theorists Hanneke Grootenboer and Georges Didi-Huberman, the former reflecting on the backgrounds of 17th-century Dutch still-life painting and the latter considering the representation of walls in some of Fra Angelico’s frescos. Their interpretations indicate how such images of walls usually found in the backgrounds of paintings might be considered as areas where something occurs that goes beyond representation. The Paredes series proposes an analysis of images that we consider neutral or less dense, with the aim of testing whether they present or evoke something other than the photographic scene, such as the void proposed by Grootenboer or the divine infinity suggested by Didi-Huberman in similar images. By employing Roland Barthes’s concept of the “neutral” we might, due to their being representations of inexpressive surfaces of no importance, situate these images in a field of fluctuation, in which they adopt no fixed position in terms of definition of content. The condition of drift – inherent to the neutral – contained in the images of walls, gives them potential to support any idea, including contrasting and exceptional ones such as the void and infinity.

A partir da minha produção de fotografias da série Paredes, este estudo investiga a representação de paredes brancas e relaciona as imagens produzidas com as reflexões dos teóricos contemporâneos de arte Hanneke Grootenboer, sobre fundos de naturezas-mortas da Holanda seiscentista, e Georges Didi-Huberman, sobre a representação de paredes em alguns afrescos de Fra Angelico. As interpretações de ambos apontam como tais imagens de paredes, usualmente encontradas em fundos pictóricos, podem ser consideradas como áreas onde há a ocorrência de algo que excede a representação. A série Paredes propõe a análise de imagens que qualificamos como rarefeitas e neutras com a intenção de verificar se elas apresentam ou evocam algo diverso da cena fotografada, como o vazio proposto por Grootenboer ou o infinito divino sugerido por Didi-Huberman em imagens similares. Ao utilizar o conceito de “neutro” de Roland Barthes, podemos situar essas imagens, por serem representações de superfícies inexpressivas e sem importância, em um campo de oscilação no qual elas não aderem a nenhuma posição fixa quanto à definição de seu conteúdo. A condição de deriva – inerente ao neutro – que as imagens de parede carregam as tornam potências com capacidade de suscitar quaisquer ideias, inclusive opostas e extraordinárias, como as de vazio e de infinito. / This study is based on my photographic work the Paredes series and investigates the representation of white walls, relating the images to the work of the contemporary art theorists Hanneke Grootenboer and Georges Didi-Huberman, the former reflecting on the backgrounds of 17th-century Dutch still-life painting and the latter considering the representation of walls in some of Fra Angelico’s frescos. Their interpretations indicate how such images of walls usually found in the backgrounds of paintings might be considered as areas where something occurs that goes beyond representation. The Paredes series proposes an analysis of images that we consider neutral or less dense, with the aim of testing whether they present or evoke something other than the photographic scene, such as the void proposed by Grootenboer or the divine infinity suggested by Didi-Huberman in similar images. By employing Roland Barthes’s concept of the “neutral” we might, due to their being representations of inexpressive surfaces of no importance, situate these images in a field of fluctuation, in which they adopt no fixed position in terms of definition of content. The condition of drift – inherent to the neutral – contained in the images of walls, gives them potential to support any idea, including contrasting and exceptional ones such as the void and infinity.