In the late antique West, every individual becoming Christian first entered the community as a catechumen (catechumenus). Many spent several years in this status called the catechumenate, only ending with baptism and the acquisition of the membership of the faithful (fideles). This thesis considers the catechumenate not only as an initiation but as a peculiar way of being Christian. It demonstrates the fluid nature of Christian membership and shows how clerics strove to develop their authority over catechumens to build a cohesive community in a context of rivalry between churches and polemical controversies. The catechumenate both enabled converts to adhere progressively to the community and constituted an opportunity for clerics to set a standard path of progression, enforce discipline and define what it meant to be a Christian. This thesis opens up new avenues to study the process of Christianisation by stressing the continuous significance of the catechumenate for the formation of Christian communities in late antiquity. After an introduction, Chapter Two focuses on Augustine's recollections of his time as a catechumen. Chapter Three looks at Augustine to investigate more broadly the practices of catechumeni, shedding light on the pervasive polemical context in which they are discussed. Chapter Four provides case studies on the cross put on the forehead to manifest Christian membership and the treatise De fide et operibus, exploring how Augustine aimed at shaping practices and ideas. Chapter Five investigates contemporary evidence: first an African canon regulating the ritual participation of catechumeni, then sermons describing unique rituals of the baptismal preparation and demonstrating that practices often varied locally. Chapter Six compares the sixth-century letter exchanges between Ferrandus and Fulgentius with John the Deacon's letter to Senarius, showing the enduring importance of the catechumenate in the West and the creative reception of earlier African sources addressing recurrent pastoral problems.

In the nineteenth century, Scottish Catholic priests were not simply trained; they were made. Preferably selected and intensely trained since boyhood, seminarians – prieststo- be – were set on a lengthy career path which expected them to become exemplary Christians, brilliant scholars, disciplined (celibate) males, loyal subjects of the Pope, and approachable ‘fathers’ to their parishioners in a Presbyterian country historically unsympathetic to their faith. By the time they left the seminary system they had been thoroughly transformed: from children to adults, from boys to men, from students to professionals and from, in many cases, labourers’ and shoemakers’ sons to gentlemen. Aspects of their lives were permanently affected by the process of moulding them into missionary priests in an immersive environment in a foreign country. But regardless of their unique experience, seminarians have rarely been the focus of historical scholarship. This thesis examines the lives and the social identities of a subsection of the Scottish Mission’s seminarians: those trained on French soil between 1818 and 1878 inclusive. It uses the prosopographical method to analyse the lives of a population of 225 France-trained individuals before, beyond and during their study migration abroad. It details the system for the education of missionary priests for Scotland before concentrating specifically on France and the post-Revolution setting of the students’ further studies there, previously undocumented by historians. It addresses the Gallican and Sulpician peculiarities of the French ecclesiastical culture reigning at the seminaries and the impact of the instability of the host society on the Scots seminarians. By using the lenses of gender, class, nation and race, it addresses different intertwining facets of this experience, elaborating on these lives through the concept of belonging. This thesis makes a significant contribution to scholarship on Roman Catholic priesthood, seminary education and Scots Colleges abroad. The individual seminarian lives highlight the paradoxical nature of a Roman Catholic clerical education, designed to mould individuals into cosmopolitan priests for the Scottish Catholic Mission.

Additive manufacturing (AM) is a growing process interesting many companies in many industries. Thereare multiple processes within the familty of AM, but this study focuses on laser blown powder (LBP). LBP involves a laser beam focused on the substrate with powder being blown into the laser beam. The laser beam melts both the powder and the surface of the substrate and as the laser beam moves and the melt pool solidies it leaves a bead of solid material behind. These beads are placed next to each other creating a layer which are then stacked, building the wanted geometry. As the method develops new materials are tested and this study analyses Haynes 282 powder onto Inconel 718 substrate. Multiple process parameters are involved in the LBP method and this study focuses on the impact of laser effect and scanning speed. Each value on the process parameters was inspired by previous reports with similar equipment and process. The laser effect ranges from 1600 W to 700 W, scanning speed ranges between 900 mm/min to 300 mm/min and the powder feeding rate was also varied from 4 g/min to 3 g/min. Each sample was built as a single bead and a multilayer specimen, which is ve layers and 16 beadswide at the bottom and 12 beads wide at the top. When analyzing the samples images from microscopes were mostly used for obtaining results. An image software called ImageJ allowed measurements in an image to obtain penetration depth or primary dendrite arm spacing. ImageJ also allowed measurements of porosity by turning the image binary and calculate the fraction of white and black. The results consists of numerical values and visual analysis of the bead geometry, minimum and maximum penetration, microstructure, porosity, hardness and cracks. The results show an increased bead width around 2 mm to 4 mm and decreased bead height around 0,2 mm to 0,7 mm of single beads with increased laser effect. Increased maximum penetration depth around, 200 μm to 500 μm, withincreased laser effect. More remelt between each deposited layer causing longer dendrites with increasinglaser effect. Porosity is decreased with an increased laser power, going from 0,04 % to 0,15 %. No distinct difference in hardness is observed between the samples, ranging between 255 HV to 310 HV. It is believed that aging causes the increased hardness right above the fusion zone. Cracks were found between dendrites and is believed to be caused by Laves-phases. Most results are comparable to previous similar studies, both as trends and numerical values. The statistics of the study is limited, meaning that all results should not be taken as granted but as a general guide line for more studies. The purpose and goals of the study has been met and completed.

An examination of the spiritual and temporal roles of Catholic chaplains in WW1 in France and Belgium. All the formative influences at home are assessed from religious, political, social, and geographic perspectives. The roles of the bishops in England and Ireland are reviewed and how their post war ambitions were interpreted at the Front are explained. Lancashire's traditional Catholic strength makes it a significant contributor, not least as the fulcrum between Irish and English catholics.

Das guatemaltekische Volk, nicht nur speziell Indigene, befindet sich in einer Phase des Wandels, im Prozess der Emanzipation von starren Institutionen und brüchig gewordenen Traditionen. Der Synkretismus als Phänomen der Gegenwart macht die Verschmelzung katholischen und indigenen Glaubenslebens seit dem 16. Jahrhundert sichtbar. Zugleich fallen ein neues Lebensverständnis und Veränderungen in der Mentalität auf: Forderungen an Staat, Gesellschaft und Religionen werden energischer und selbstbewusster vorgebracht. Die Religionsverhältnisse innerhalb Guatemalas sind einem Wandel unterworfen, was nicht nur am Monopolverlust der katholischen Kirche liegt, sondern auch der weitreichenden politischen Instabilität geschuldet ist, die wiederum die Gestaltung individueller Lebenskonzeptionen nicht unberührt lässt. Der Bedeutungsverlust der katholischen Kirche spielt eine wichtige Rolle, um die Verschiebungen zu den Pfingstkirchen zu verstehen, die sich in Guatemala rasch ausbreiteten. Eine Analyse von Religiosität ist unter Ausblendung der sozialen Veränderungen einer Gesellschaft nicht möglich. Das religiöse Leben wird von vielfältigen Faktoren beeinflusst: Von der Beziehung von Politik und Religion, von der gesellschaftliche Positionierung und dem individuellen Glaubensleben der Individuen, von der mangelnden staatlichen Eigenständigkeit, die Fortschritte behindern kann. In diesen Bezügen steht das Individuum mit seinen Erwartungen, seinen Traditionen, seiner Kultur. In dieser Phase der Selbstemanzipierung kann man fragen: Was können religiöse Systeme in einer Phase der Wiederentdeckung traditioneller Maya-Sprachen, der Aufarbeitung von Gewaltphasen und Unterdrückung ganzer Bevölkerungsgruppen und des Einflusses nordamerikanischer und europäischer Lebensstile dem Individuum bieten? / The people of Guatemala, not just Indígenas in particular, are undergoing changes. They are emancipating theirselves from instransigent institutions and fragile traditions. Syncretism as a present phenomenon uncovers the conflation of Catholic and indigenous lives of faith. At the same time new understandings of life and changes of mentality are noticed. People now express their matters to state, society and religions stronger and more self-confident. Religious affairs within Guatemala are subject to change, which is not only caused by the loss of the Catholic monopoly but also by the extensive political instability that again influences the shaping of individual concepts of life. The notice of the loss of importance of the Catholic Church is crucial to understand the shifts to the rapidly spreading Pentecostal Churches in Guatemala. It is impossible to analyze religiousness without including social transformations. Religious life is defined by multiple factors: by the relationship between politics and religion, by the social positioning and the individual life of faith, by an insufficient state autonomy that may hamper progress. With its expectations, traditions and culture, the individual is embedded in these factors. In this process of self-emancipation one may ask: In a period of rediscovery of traditional mayan languages, of reconditioning of times of violence and oppression of entire populations, of influence of North American and European ways of life: What are religious systems able to offer to the individual?

Haynes 282 is a gamma prime (𝛾′)-strengthened nickel base superalloy developed in 2005, exhibiting a good combination of high temperature properties and fabricability. Microstructural features such as 𝛾′ and carbides play an important role in deriving the mechanical properties of the alloy during heat treatment. As Haynes 282 is a relatively new alloy with insufficient literature availability, the present thesis is aimed at studying the evolution of microstructure for different heat treatment times and temperature with a special focus on 𝛾′ phase precipitation kinetics with different initial conditions for the material. The study is divided into two sections with objectives which are focused on the different ends to the heat-treatment time scales. The first objective of this study was to investigate γ' precipitation at short heat treatment times and develop Time-Temperature Precipitation (TTP) and Hardness (TTH) diagrams for Haynes 282 using a novel arc heat treatment. In this technique, a steady state temperature gradient, covering room temperature to liquidus, was created using stationary TIG arc on a disc mounted on a water-cooled chamber. Aged and solutionized samples were arc heat treated for 1.5 minutes, 30 minutes and 4 hours. The study was complemented with temperature modelling, thermodynamic calculations, and 𝛾′ precipitation simulation. A unique graded microstructure formed, consisting of dendritic region in fusion zone; dissolution area of all phases including MC carbides, grain boundary carbides, and 𝛾′; grain boundary carbide zone, 𝛾′ band; and base metal. 𝛾′ precipitate size increased with increasing time and temperature. 𝛾′ precipitation simulation model was developed, and it showed very good agreement with experimental results. Finally, the results were summarized in TTH and TTP diagrams. The second objective in this work was to study understand the coarsening behaviour of 𝛾′ phase with an initial pre-heat-treated GKN heat treatment using furnace heat treatment. Isothermal heat treatments for temperatures from 800°C to 1120°C and times from 30 seconds to 96 hours were performed. Morphological changes in 𝛾′ phase, particle size distribution, grain sizes and hardness on these isothermal heat-treated states are presented in this work. Additionally, A TC PRISMA precipitation model was evaluated to predict 𝛾′sizes and compare it with the measurements. It was concluded that complex initial microstructure, containing bimodal distribution of 𝛾′ precipitates, caused deviations between predicted and measured values, while the model, in the previous objective, predicted the sizes in close approximation to the experimental values. Therefore, further understanding and development of precipitation kinetics with the software should be done to achieve closer results to the experiment. / Haynes 282 är ett gamma prime (𝛾′) - förstärkt superlegering av nickelbas som utvecklades 2005 och uppvisar en god kombination av högtemperaturegenskaper och tygbarhet. Mikrostrukturella egenskaper såsom 𝛾′ och karbider spelar en viktig roll för att få de mekaniska egenskaperna hos legeringen under värmebehandling. Eftersom Haynes 282 är en relativt ny legering med otillräcklig litteraturtillgänglighet syftar den aktuella avhandlingen till att studera utvecklingen av mikrostruktur för olika värmebehandlingstider och temperatur med ett särskilt fokus på 𝛾′ fasutfällningskinetik med olika initiala förhållanden för materialet. Studien är uppdelad i två sektioner med mål som är inriktade på de olika ändarna på värmebehandlings tidsskalorna. Det första syftet med denna studie var att undersöka 𝛾′nederbörd vid korta värmebehandlingstider och utveckla Time-Temperature Precipitation (TTP) och Hardness (TTH) diagram för Haynes 282 med användning av en ny bågvärmebehandling. I denna teknik skapades en jämn temperaturgradient, som täcker rumstemperatur till liquidus, med användning av stationär TIG-båge på en skiva monterad på en vattenkyld kammare. Åldriga och lösningsbara prover bågvärmebehandlades under 1,5 minuter, 30 minuter och 4 timmar. Studien kompletterades med temperaturmodellering, termodynamiska beräkningar och 𝛾′utfällningssimulering. En unik graderad mikrostruktur bildad, bestående av dendritisk region i fusionszon; upplösningsområde för alla faser inklusive MC-karbider, korngränsande karbider och 𝛾′; korngränsen karbidzon, 𝛾′ band; och oädel metall. 𝛾′utfällningsstorlek ökade med ökande tid och temperatur. 𝛾′utfällningssimuleringsmodell utvecklades, och den visade mycket bra överensstämmelse med experimentella resultat. Slutligen sammanfattades resultaten i TTH- och TTP-diagram. Det andra syftet med detta arbete var att studera förstå det förgrovning beteendemönster hos 𝛾′ fasen med en initial förvärmebehandlad GKN-värmebehandling med ugnsvärmebehandling. Isotermiska värmebehandlingar för temperaturer från 800 ° C till 1120 ° C och gånger från 30 sekunder till 96 timmar utfördes. Morfologiska förändringar i 𝛾′fasen, partikelstorleksfördelning, kornstorlekar och hårdhet på dessa isotermiska värmebehandlade tillstånd presenteras i detta arbete. Dessutom utvärderades en TC PRISMA-nederbördsmodell för att förutsäga 𝛾′ storlekar och jämföra den med mätningarna. Det drogs slutsatsen att komplex initial mikrostruktur, innehållande bimodal fördelning av 𝛾′-fällningar, orsakade avvikelser mellan förutspådda och uppmätta värden, medan modellen i det tidigare målet förutspådde storleken i nära anpassning till experimentvärdena. Därför bör ytterligare förståelse och utveckling av utfällningskinetik med programvaran göras för att uppnå närmare resultat till experimentet.

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This dissertation provides an analysis of the attempts by John Henry Newman to account for the historical reality of doctrinal change within Christianity in the light of his lasting conviction that the idea of Christianity is fixed by reference to the dogmatic content of the deposit of faith. The existing literature on Newman is enormous and wide-ranging but this present work fills a notable gap by treating Newman at any particular point in the account as a person with an open future, where his present acts are not determined by later events, and where any apologetic intent has to be identified and accounted for by reference to the immediate matter under consideration and the contemporaneous evidence. The argument of the thesis is that Newman proposed a series of hypotheses to account for the apparent contradiction between change and continuity, that this series begins much earlier than is generally recognised and that the final hypothesis he was to propose, contained in An Essay on the Development of Christian Doctrine, (‘Essay’), provided a methodology of lasting theological value. The introduction establishes the centrality of the problem of change and continuity to Newman's theological work as an Anglican, its part in his conversion to Roman Catholicism and its contemporary relevance to Roman Catholic theology. It also surveys the major secondary literature relating to the question, with particular reference to those works published within the last fifty years. In the first main chapter, covering the period to the publication of his first major work, The Arians of the Fourth Century, in 1833, Newman's earliest awareness of the problem and first attempts to solve it are considered. The growing confidence of Newman's Tractarian period and his development of the notion of the Via Media form the second chapter and the collapse of that confidence, the subject matter of the third. The fourth chapter is concerned with the emergence of the theory of development and the writing and content of the Essay. The conclusion considers the legacy of the Essay as a tool in Newman’s theology and in the work of later theologians, finally suggesting that it may offer a useful methodological contribution to the contemporary Roman Catholic debate about hermeneutical approaches to the Second Vatican Council.

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