Dissertations / Theses on the topic 'DP 980'

Friction Bit Joining (FBJ) is a new technology that allows lightweight metals to be joined to advanced high-strength steels (AHSS). Joining of dissimilar metals is especially beneficial to the automotive industry because of the desire to use materials such as aluminum and AHSS in order to reduce weight and increase fuel efficiency. In this study, FBJ was used to join 7075 aluminum and DP980 ultra-high-strength steel. FBJ is a two-stage process using a consumable bit. In the first stage, the bit cuts through the top material (aluminum), and in the second stage the bit is friction welded to the base material (steel). The purpose of the research was to examine the impact a solid head bit design would have on joint strength, manufacturability, and ease of automation. The solid head design was driven externally. This design was compared to a previous internally driven head design. Joint strength was assessed according to an automotive standard established by Honda. Joints were mechanically tested in lap-shear tension, cross-tension, and peel configurations. Joints were also fatigue tested, cycling between loads of 100 N and 750 N. The failure modes that joints could experience during testing include: head, nugget, material, or interfacial failure. All tested specimens in this research experienced interfacial failure. Welds were also created and examined under a microscope in order to validate a simulation model of the FBJ process. The simulation model predicted a similar weld shape and bond length with 5 percent accuracy. Joints made with external bits demonstrated comparable joint strength to internal bits in lap-shear tension and cross-tension testing. Only external bits were tested after lap-shear tension, because it was determined that external bits would perform comparably to internal bits. Joints made with external bits also exceeded the standard for failure during fatigue testing. Peel tested specimens did not meet the required strength for the automotive standard. Examining specimens under a microscope revealed micro-cracks in the weld. These defects have been shown to decrease joint strength. Joint strength, especially during peel testing, could be increased by reducing the presence of micro-cracks. The external bit design is an improvement from the internal bits for manufacturability and ability to be automated, because of the less-expensive processes used to form the bit heads and the design that lends to ease of alignment.

With the desire to improve passenger safety and fuel efficiency, Ultra High Strength Steels (UHSS) have been developed for use in the automotive industry. UHSS are high strength steels with high ductility and strength. DP 980 is one of these UHSS being applied in automobile manufacturing. DP 980 is difficult to join with Resistance Spot Welding (RSW) because of the high carbon content and alloying in this material. The weld becomes brittle when it solidifies during the welding process. With the desire and motivation of widely using UHSS, new welding processes are needed to be developed in order to effectively join DP 980. Friction Stir Spot Welding (FSSW) is a developing welding process aimed to replace RSW in the automotive industry because of its ability to join materials at a lower temperature. Currently the welding loads of the tools are higher than 2000 pounds, ranging from 3,000 to 5,000 pounds, which exceeds the limit of the welding robots in the automotive factories. It is proposed that the welding loads can be reduced by increasing the spindle speed of the FSSW tool. Other focuses in the research include increasing the life of the tool and developing acceptable welding parameters for High Speed FSSW. The experimental work done for this thesis provided support that weld strength can be obtained at levels above the acceptable standard for DP 980 material (greater than 2400 pound lap shear fracture load for 1.2 mm material) while keeping the vertical load on the welding machine spindle below 2000 lbs.

With the desire to lighten the frame while keeping or increasing the strength, Advanced High-Strength Steels (AHSS) have been developed for use in the automotive industry. AHSS meet many vehicle functional requirements because of their excellent strength and acceptable ductility. But joining AHSS is a challenge, because weldability is lower than that of mild steels. Friction stir spot welding (FSSW) is a solid state joining process that can provide a solution to the weldability issues in AHSS, but FSSW has not been studied in great detail for this application. In this work, Si3N4 tools were used for FSSW experiments on DP 980 steel with 1.2mm thickness. Joint strength was measured by lap shear tension testing, while thermocouples were used for the temperature measurements. A finite element model was developed in order to predict material flow and temperatures associated with FSSW. Since a 3D model of the process is very time consuming, a novel 2D model was developed for this study. An updated Lagrangian scheme was employed to predict the flow of sheet material, subjected to the boundary conditions of the fixed backing plate and descending rotating tool. Heat generation by friction was computed by including the rotational velocity component from the tool in the thermal boundary conditions. Material flow was calculated from a velocity field while an isotropic, viscoplastic Norton-Hoff law was used to compute the material flow stress as a function of temperature, strain and strain rate. Shear stress at the tool/sheet interface was computed using the viscoplastic friction law. The model predicted welding temperatures to within 4% of the experiments. The welding loads were significantly over predicted. Comparison with a 3D model of FSSW showed that frictional heating and the proportion of total heat generated by friction were similar. The position of the joint interface was reasonably well predicted compared to experiment.

La presente Tesis Doctoral La Exposicion Iberoamericana (EIA) de Sevilla en contexto tiene como hilo conductor la arquitectura como manifestacion cultural de su epoca. De esta manera, el analisis arquitectonico de la EIA pondra de manifiesto, en primer lugar, la influencia de las Exposiciones Universales ensayadas durante el siglo XIX. Estos certamenes demostraron su capacidad de sintesis al encapsular los avances de cada paí­s, sin olvidar la plasmacion de la identidad nacional a traves de la arquitectura de sus pabellones. La EIA se basara en este modelo para sintetizar no ya los avances tecnologicos o coloniales de Espana y Latinoamerica, sino, por el contrario, las relaciones existentes entre ambas tras las independencias. En segundo lugar, y a traves del analisis de los pabellones de las distintas naciones sera posible discernir que imagen querian mostrar al otro, a Espana, a las otras republicas latinoamericanas, con su participacion en la EIA. La Plaza de America a traves de los estilos Neogotico, Neomudejar y Neoplateresco pondra de manifiesto la influencia de la corriente conservadora panhispanista, que proponia restablecer una suerte de neoimperialismo sobre las excolonias espanolas. Frente a este afan de superioridad cabe destacar como la mayoria de las republicas latinoamericanas prefirieron condensar su identidad en pabellones neobarrocos, en los que la arquitectura se relaciona con la corriente liberal del Panhispanoamericanismo. El mejor ejemplo de esta corriente esta representado en el pabellon de Argentina. Mexico, por su parte, pondra la nota discordante al establecer, con la arquitectura de su pabellon Neoindigena, la independencia total de Espana, y la relevancia de las culturas indigenas a la hora de conformar su identidad nacional. Disenado por Amabilis durante el gobierno de Calles, este pabellon esta inmerso en la corriente del Indigenismo que, a pesar de haberse desarrollado en toda America Latina, tuvo especial pujanza en Mexico. Por ultimo, en la arquitectura de la Plaza de Espana sera posible descubrir, en la eleccion de los estilos arquitectonicos, la necesidad de repensar una nueva identidad para Espana, que habia dejado de ser un imperio para convertirse en una nacion europea de segunda fila. De esta manera, en tercer y ultimo lugar, al analizar los pabellones de la EIA, sera posible comprender las distintas motivaciones que llevaron a los paises participantes a erigir un pabellon permanente en la capital hispalense: bien para fomentar las relaciones entre las naciones hispanas en aras de ser mas fuertes frente al imperialismo de los Estados Unidos; para redescubrir una identidad comun basada en la raza o en la lengua; para fortalecer las relaciones comerciales; o simplemente con la intencion de utilizar la arquitectura como propaganda politica, economica, o incluso turí­stica.

This thesis covers the Norman and Anglo-Norman contribution to the Iberian Reconquista from the early eleventh to the mid-thirteenth centuries. It explores the involvement of these groups as part of the changing ideas of Holy War and their transformation as result of the First Crusade. It shows that although the Reconquista was the result of important political and economic factors within the Iberian realms, the theological aura that the papacy started placing on this conflict was a powerful motivator increasing the interest of the Normans and later Anglo-Normans, especially when coincidental with the general call for crusade in western Europe that resulted in the large expeditions that are known to us as the crusades. To cover these areas, this work is divided in four main sections: the first, Chapter II, pursues chronologically the careers of individual members of the Norman nobility such as Roger of Tosny, Robert Crispin and Robert Burdet as they became involved. It also addresses the influence that institutions like Cluny and the papacy might have had in the creation of the idea of the Reconquista in the minds of those involved. The second section, Chapter III explores the brief decline of the Norman interest in the peninsula as a result of the Norman conquest of England and the First Crusade. It also explores the revitalization of the Norman interest in the peninsular conflict with the careers of Rotrou of Perche and Robert Burdet. Chapter IV, addresses the large contribution of the Anglo-Normans as part of the Second Crusade and their motivations and the impact of their arrival on the Iberian realms. Chapter V explores the participation of the lower aristocracy and merchants from the mid-twelfth century onwards in the coastal actions on both the Atlantic and Mediterranean coasts of Iberia, showing the impact that these actions had in the Reconquista. Finally, Chapter VI explores how the changing political circumstances in Iberia and the Anglo-Norman domains helped to increase awareness during the rise of the Angevin empire and the newly found diplomatic relations between the two regions. However, it also shows that although by the thirteenth century the Reconquista was perceived as a legitimate area of crusading, the political and economic circumstances on the peninsula as well as of the English Crown had important repercussions for the drastic decline in the number of participants.

The 1985 and 1986 Cotton Reports have the same publication and P-Series numbers.
Six lots of Deltapine (DP) 90 of different seed densities were planted at three planting rates in four tests in Arizona in 1985. The lowest density seed lot had significantly lower standard germination, cold test germination, field emergence, and lint yield than other seed lots. The highest density seed lot had slightly higher lint yield and field emergence than other lots on an average.

This thesis explores the changes introduced in the Spanish system of viceregal rule, both in Peninsular Spain and the Spanish America, during the reigns of Philip V (1700-1724 and 1724-1746). It argues that these changes reflect broader transformations in Spain's politics and political culture accelerated by the arrival of the Bourbon dynasty. In particular, the thesis documents the gradual emergence of three characteristics associated with the transition from a judicial to an administrative monarchy: the introduction of new decision making and implementation procedures which prioritise executive government and limited consultation; the consolidation of a new understanding of the role of monarchical government which places less emphasis on the provision of justice and more on the king's responsibilty for matters of economic government and development; and a reshuffling of the elites which make up governmental institutions in favour of individuals with direct connections to the new royal household, distinguished more for their loyalty, administrative efficiency or military merit than for their social status and distinctions. The thesis studies the suppression of viceregal rule in the Crown of Aragon, the initially failed but later successful attempts to establish a third viceroyalty in Spanish America, and the changing social origins, and career paths of the men appointed as viceroys through the period as well as the changing expectations placed on them. The thesis highlights important parallels between the reforms introduced in Peninsular Spain and Spanish America, both in their aims and the personnel chosen to implement them. It thus suggests that Spanish ministers during the first half of the eighteenth century often espoused the opinion that the Crown should look at the Indies, in the words of José del Campillo, 'as a sizeable portion of the Monarchy in which it is possible to implement the same improvements as in Spain'.

The 1985 and 1986 Cotton Reports have the same publication and P-Series numbers.
Nodes to first square and number of fruit in early fruiting positions were evaluated in Pinal County early season insecticide trials. Acephate treatments increased the number of fruit in early fruiting positions at three of four locations. Two of these same locations also received sidedressed aldicarb applications, but no significant response to aldicarb was observed.

At the moment of the founding of the Second Republic in April 1931, the labour movement in Spain was dominated by two organizations, namely the anarcho-syndicalist Confederación Nacional del Trabajo (CNT) and the socialist Unión General de Trabajadores (UGT). The Second Republic marked the first period in which the two organizations had concurrently operated openly since the Primo de Rivera dictatorship had made the CNT illegal at the same time as the UGT had agreed to cooperate with the General’s corporatist project. With the founding of the Republic, a long-standing organizational and ideological hostility between the two organizations was exacerbated by the fact of the UGT actively participating in the reform project of the Republican-socialist government and the CNT increasingly opposing that project. However, the Republic progressively became polarized between left and right; as fascist regimes came to the fore across Europe, increasingly large sectors of the Spanish left called for a unity of their forces to prevent a similar occurrence in Spain. The outbreak of the Civil War in July 1936 made this unity even more imperative. This thesis focuses on interactions between the CNT and the UGT between 1931 and 1936 within this socio-political context, primarily from the perspective of the CNT. The thesis traces and analyses the evolution of CNT as a national actor’s overall position on the UGT from one of outright hostility to a stance of proposing a revolutionary alliance with it in 1936. The thesis also examines interactions between the two organizations in Catalonia, which was both the CNT's birthplace and stronghold and a region in which the UGT had historically garnered little support. In addition to highlighting the pivotal role that the Catalan CNT had in determining the CNT's national-level stance on the UGT throughout this period, the thesis explores how the anarcho-syndicalist movement in the region presented its socialist counterpart as the embodiment of a socialist- and state-sponsored project to destroy the CNT, and also examines the largely hostile encounters between CNT and UGT unions in workplaces and localities across the region.

The Women's Section (Seccion Femenina) of the Franco regime's bureaucratic framework was founded in 1934 as an offshoot of the small fascist party, the Falange. Its leader, Pilar Primo de Rivera, was the sister of the Falange's founder, Jose Antonio Primo de Rivera and remained in post throughout the regime. The present study is of Seccion Femenina (SF) as it developed following the death of Jose Antonio during the Spanish Civil War, becoming part of the regime's bureaucracy while retaining its original ideological base. The thesis examines the emerging role of SF in the Spanish Civil War as a supporter of the Nationalist cause and its mandate in 1939 to train and prepare the women and girls in Spain for life under the new regime. SF's influence on government legislation and its contribution to the nation's economic and social stability up to 1959 are examined in relation to the political events of the period as well as the compromises made as SF faced opposition from other sectors of the regime. The second focus of the thesis is SF's ideological base and inner identity, and particularly the degree to which it exhibited features of fascism. This is examined in relation to its elite members, whose belief system was so enduring that it survived the decline of Falangism in the regime. In the face of political realities, SF always saw its 1939 mandate as its own 'Falangist Revolution' and its elite members as capable of transforming society. The origins of these beliefs, the contribution of foreign influences and the transmission of SF ideology in SF's elite academy are analysed in relation to the work and self-image of the elites. The paradox of SF as a loyal supporter of Francoism while challenging the class and social base of the regime is also examined, and religion is shown as the most significant area where SF differed from mainstream opinion and practice. SF's programmes have been studied via primary sources, journals and archive materials. The major primary source, however, is the set of forty-five interviews, conducted principally in Madrid but also in Salamanca, Santiago de Compostela, Palencia, Medina del Campo, Zaragoza, Toledo, the province of Leon and Britain between 1994 and 1999. Interviewees are mainly former elite members of SF together with unaffiliated women, male Falangists and others with experience of SF's programmes.

Software packages for the numerical solution of partial differential equations (PDEs) using the finite element method are important in different fields of research. The basic data structures and algorithms change in time, as the user\'s requirements are growing and the software must efficiently use the newest highly parallel computing systems. This is the central point of this work. To make efficiently use of parallel computing systems with growing number of independent basic computing units, i.e.~CPUs, we have to combine data structures and algorithms from different areas of mathematics and computer science. Two crucial parts are a distributed mesh and parallel solver for linear systems of equations. For both there exists multiple independent approaches. In this work we argue that it is necessary to combine both of them to allow for an efficient and scalable implementation of the finite element method. First, we present concepts, data structures and algorithms for distributed meshes, which allow for local refinement. The central point of our presentation is to provide arbitrary geometrical information of the mesh and its distribution to the linear solver. A large part of the overall computing time of the finite element method is spend by the linear solver. Thus, its parallelization is of major importance. Based on the presented concept for distributed meshes, we preset several different linear solver methods. Hereby we concentrate on general purpose linear solver, which makes only little assumptions about the systems to be solver. For this, a new FETI-DP (Finite Element Tearing and Interconnect - Dual Primal) method is proposed. Those the standard FETI-DP method is quasi optimal from a mathematical point of view, its not possible to implement it efficiently for a large number of processors (> 10,000). The main reason is a relatively small but globally distributed coarse mesh problem. To circumvent this problem, we propose a new multilevel FETI-DP method which hierarchically decompose the coarse grid problem. This leads to a more local communication pattern for solver the coarse grid problem and makes it possible to scale for a large number of processors. Besides the parallelization of the finite element method, we discuss an approach to speed up serial computations of existing finite element packages. In many computations the PDE to be solved consists of more than one variable. This is especially the case in multi-physics modeling. Observation show that in many of these computation the solution structure of the variables is different. But in the standard finite element method, only one mesh is used for the discretization of all variables. We present a multi-mesh finite element method, which allows to discretize a system of PDEs with two independently refined meshes
Softwarepakete zur numerischen Lösung partieller Differentialgleichungen mit Hilfe der Finiten-Element-Methode sind in vielen Forschungsbereichen ein wichtiges Werkzeug. Die dahinter stehenden Datenstrukturen und Algorithmen unterliegen einer ständigen Neuentwicklung um den immer weiter steigenden Anforderungen der Nutzergemeinde gerecht zu werden und um neue, hochgradig parallel Rechnerarchitekturen effizient nutzen zu können. Dies ist auch der Kernpunkt dieser Arbeit. Um parallel Rechnerarchitekturen mit einer immer höher werdenden Anzahl an von einander unabhängigen Recheneinheiten, z.B.~Prozessoren, effizient Nutzen zu können, müssen Datenstrukturen und Algorithmen aus verschiedenen Teilgebieten der Mathematik und Informatik entwickelt und miteinander kombiniert werden. Im Kern sind dies zwei Bereiche: verteilte Gitter und parallele Löser für lineare Gleichungssysteme. Für jedes der beiden Teilgebiete existieren unabhängig voneinander zahlreiche Ansätze. In dieser Arbeit wird argumentiert, dass für hochskalierbare Anwendungen der Finiten-Elemente-Methode nur eine Kombination beider Teilgebiete und die Verknüpfung der darunter liegenden Datenstrukturen eine effiziente und skalierbare Implementierung ermöglicht. Zuerst stellen wir Konzepte vor, die parallele verteile Gitter mit entsprechenden Adaptionstrategien ermöglichen. Zentraler Punkt ist hier die Informationsaufbereitung für beliebige Löser linearer Gleichungssysteme. Beim Lösen partieller Differentialgleichung mit der Finiten Elemente Methode wird ein großer Teil der Rechenzeit für das Lösen der dabei anfallenden linearen Gleichungssysteme aufgebracht. Daher ist deren Parallelisierung von zentraler Bedeutung. Basierend auf dem vorgestelltem Konzept für verteilten Gitter, welches beliebige geometrische Informationen für die linearen Löser aufbereiten kann, präsentieren wir mehrere unterschiedliche Lösermethoden. Besonders Gewicht wird dabei auf allgemeine Löser gelegt, die möglichst wenig Annahmen über das zu lösende System machen. Hierfür wird die FETI-DP (Finite Element Tearing and Interconnect - Dual Primal) Methode weiterentwickelt. Obwohl die FETI-DP Methode vom mathematischen Standpunkt her als quasi-optimal bezüglich der parallelen Skalierbarkeit gilt, kann sie für große Anzahl an Prozessoren (> 10.000) nicht mehr effizient implementiert werden. Dies liegt hauptsächlich an einem verhältnismäßig kleinem aber global verteilten Grobgitterproblem. Wir stellen eine Multilevel FETI-DP Methode vor, die dieses Problem durch eine hierarchische Komposition des Grobgitterproblems löst. Dadurch wird die Kommunikation entlang des Grobgitterproblems lokalisiert und die Skalierbarkeit der FETI-DP Methode auch für große Anzahl an Prozessoren sichergestellt. Neben der Parallelisierung der Finiten-Elemente-Methode beschäftigen wir uns in dieser Arbeit mit der Ausnutzung von bestimmten Voraussetzung um auch die sequentielle Effizienz bestehender Implementierung der Finiten-Elemente-Methode zu steigern. In vielen Fällen müssen partielle Differentialgleichungen mit mehreren Variablen gelöst werden. Sehr häufig ist dabei zu beobachten, insbesondere bei der Modellierung mehrere miteinander gekoppelter physikalischer Phänomene, dass die Lösungsstruktur der unterschiedlichen Variablen entweder schwach oder vollständig voneinander entkoppelt ist. In den meisten Implementierungen wird dabei nur ein Gitter zur Diskretisierung aller Variablen des Systems genutzt. Wir stellen eine Finite-Elemente-Methode vor, bei der zwei unabhängig voneinander verfeinerte Gitter genutzt werden können um ein System partieller Differentialgleichungen zu lösen

This is a study of government and governance in the Audiencia of Santa Fe during the last two decades of Habsburg rule and the first two decades of Bourbon rule, a period largely neglected by historians of New Granada and of Spanish America in general. However, it is not simply an administrative history. Rather than focus primarily on the structure of government and formal mechanisms of power and authority, this study aims, as the title indicates, to examine the political activity contained within the formal structure of institutions and laws. It looks at the ways in which institutions of government actually functioned within the society they were designed to govern and control, in other words the workings of government. These are themes which have been little studied by historians of the region, despite the importance which has been attached to the colonial state as a force which played a primary role in shaping New Granada's history. Studies of the colonial state have tended to portray it as a hierarchy of institutions, closely controlled from the centre, which developed as Spain's monarchs sought to legitimise their dominion and impose their control over the vast territories of the Americas. They have presented royal institutions of government in the Indies, the audiencia and provincial governors in the case of New Granada as the tools of an absolutist monarchy, employed by the Spanish crown to expand royal power over Spanish American subjects. The present study thus aims to challenge this picture by making detailed reference to contemporary documentation and taking into account recent research on early modern government and governance in areas outside New Granada. We will attempt to show that government in the Audiencia of Santa Fe was not a rigid structure but very political in nature.

This work is a study of the Catalan nationalist experience under the Franco regime, (1939-1975). Its aim is to account for the transformed status of Catalan nationalism at the dictatorship's end and explain the emergence of Convergencia i Unio (Convergence and Union), which since 1980 has become the political embodiment of Catalanism. Prior to 1939, with the achievement of the Catalan autonomy statute, Catalan nationalism had seemed to be embarked on a programme of the Catalanisation of society. In 1939, with Francoist victory in the Spanish Civil War (1936-39), it appeared certain that the Catalan nationalist movement would be crushed. Yet, this did not happen and it emerged in 1975 with more widespread social acceptance than ever before. This study is principally concerned with the relations between Catholicism and Catalanism. The Catalan Church had been involved in the Catalanist movement in the late nineteenth century but it became marginalised by the time of the Second Spanish Republic (1931-39). In 1936 the Catalan Church underwent a ferocious assault that included the execution of over 2,000 priests and members of religious orders. The victory of Spanish Nationalism in 1939 not only restored the Church, but gave it unprecedented power and influence over Catalan society. This new position in Catalan society gave the Church an opportunity to re-create Catalanism. This study argues that, for most of the Franco regime, Catalanism underwent a Catholicisation. Until the mid-1960s the only legally permitted Catalan-language publications were religious. Furthermore, Catholicism was greatly influential in civil society and in the re-formulation of Catalan culture. The origins of Convergencia i Unio are also to be found in the activities of the Catalan-nationalist business class. As will be seen, this sector was also transformed by the Franco dictatorship. No study in English or Catalan has examined Catalonia 1939-75 that has explained the emergence of the Catholic-influenced Convergencia i Unio or the changes that have taken place in Catalan culture and Catalanist ideology during this period.

The 1985 and 1986 Cotton Reports have the same publication and P-Series numbers.
Partial pre-germination of Deltapine 90 seed under oxygen and then drying prior to planting tended to speed and increase emergence in two tests in 1985, but did not increase lint yield.

Between 1810 and 1826 Spain lost most of her possessions in the Americas, and the inhabitants of Spanish America ceased to be subjects of the king, and became citizens of a series of new republics such as Mexico, Peru, Chile and Colombia. This thesis explores how the transition from colonial to republican rule was experienced by the inhabitants of the provinces of Santa Marta and Riohacha (Colombia), and the extent to which the transition implied a radical break with the colonial past. Santa Marta was among the most important royalist strongholds in the northern part of Spanish South America, and the thesis offers an interpretation of the much-neglected theme of Spanish American royalism during the independence period. It focuses on the social and 'ethnic' configuration of the provinces, and it discusses how different social/ 'ethnic' groups were constructed in the colonial period, how they responded and acted during the wars of independence and what the transition to republican rule implied for the make-up of nineteenth-century society. The analyses of late colonial and early republican society are done principally (but not exclusively) through a detailed discussion of marriage practices and patterns. The study is based primarily on archival sources from Spanish and Colombian depositories.

This thesis investigates the economic culture that fostered the constitutional history and political cosmology of late medieval and early modern Genoa. Genoese economic actors are here studied through their diversified trades and businesses, as they moved from the shores of the Black Sea into the Atlantic. Genoa’s late medieval economic expansion is described through several case studies and briefly compared to the state-run military expansion of Venice’s empire. Genoese colonial history is found to be both peculiar and relevant, as entrepreneurial techniques, institutions and attitudes later transferred to the Atlantic first originated in the private networks built by Ligurian businessmen in the thirteenth and fourteenth centuries. The adaptability and entrepreneurial skills that allowed Genoese merchants and bankers, captains and businessmen, tax collectors and clergymen to enter the Spanish Atlantic in the sixteenth century are linked to the medieval history of the Genoese commune, to the specific idea of libertà progressively defined and protected by its fluid elite, and to the development of Hispanic-Genoese diplomatic and financial relations. Through the study of diverse documents in Italian, Genoese dialect, Venetian dialect, Spanish, Latin, and English, Genoa’s civic ideology and institutions are revealed to be intertwined with Genoese entrepreneurs’ simultaneity of careers, cosmopolitan self-perception, and mimetic imperialism. The thesis closes with a survey of the Genoese economic activities in Spain’s American kingdoms, whose most significant result is the illustration of Genoa’s multifaceted roles in the building of the Hapsburg Atlantic. This work thus constitutes the first chronologically and thematically broad attempt to explain the prolonged Genoese presence on the stage of intercontinental commerce as well as the existence of a modern Ligurian Atlantic.