Search results for "revolution"
showing 10 items of 152 documents
Hochfrequenz-Rotationsatherektomie bei koronarer Herzkrankheit
2008
Percutaneous high frequency coronary rotational ablation (PTCR) was used in 10 patients with significant coronary artery disease. PTCR removes arteriosclerotic material from the vessel wall. A diamond-coated (60-80 micron) brass burr-drill, fastened to a flexible drive shaft rotating and tracking along a central coaxial guide wire, was used. The turbine rotates the drive shaft in excess of 150,000-190,000 revolutions per minute. PTCR was successful in all patients, but in three additional percutaneous transluminal coronary angioplasty (PTCA) was then successfully performed. Coronary dissection occurred only once, requiring surgery which was successful. No vessel perforation was observed. Al…
Eulerian models of the rotating flexible wheelset for high frequency railway dynamics
2019
Abstract In this paper three formulations based on an Eulerian approach are presented to obtain the dynamic response of an elastic solid of revolution, which rotates around its main axis at constant angular velocity. The formulations are especially suitable for the study of the interaction of a solid with a non-rotating structure, such as occurs in the coupled dynamics of a railway wheelset with the track. With respect to previous publications that may adopt similar hypotheses, this paper proposes more compact formulations and eliminates certain numerical problems associated with the presence of second-order derivatives with respect to the spatial coordinates. Three different models are dev…
Thomas Paine's influence on the Girondin constitutional project of 1793
2018
This article aims to investigate what may have been Thomas Paine's influence on the Girondin constitutional project presented by Marie-Jean-Antoine-Nicolas de Caritat Condorcet to the French Nation...
Nación, emoción y fantasía. La España melodramática de Ayguals de Izco = Nation, Emotion and Fantasy. Ayguals de Izco's Melodramatic Spain
2017
El artículo analiza las novelas por entregas de Wenceslao Ayguals de Izco (1801-1873) desde su dimensión melodramática para señalas de qué modo participaron en la creación de los imaginarios, las narrativas sociales y políticas y la "comunidad emocional" del radicalismo democrático español de mediados del siglo XIX. Posteriormente examino una serie de "fantasías nacionales" que se repiten con insistencia en estas novelas melodramáticas: la unión matrimonial como metáfora de la plenitud nacional, el mártir por la patria y el "ángel de salvación" que socorre a los desfavorecidos. Todas estas fantasías se fundan en la diferencia sexual (al tiempo que la construyen) y permiten la identificación…
Radical Experiences of Portuguese Social Workers in the Vanguard of the 1974 Revolution
2019
This article focuses on the contribution of social workers to the Portuguese democratic transition in the 1970s. Their involvement in urban social mobilizations and in the cooperative movement will offer a perspective on the participation of social workers alongside the Revolutionary process and how they, through engaging with social mobilization, grass-roots initiatives and socio-political activism deployed practices consistent with radical social work frames. It is argued that the Revolution provided the structural conditions for social workers to engage with radical practice and that their intervention constituted a form of agency for socio-political transformation while influencing prof…
Dupin cyclide blends between non-natural quadrics of revolution and concrete shape modeling applications
2014
Abstract In this work, we focus on the blending of two quadrics of revolution by two patches of Dupin cyclides. We propose an algorithm for the blending of non-natural quadrics of revolution by decomposing the blending operation into two complementary sub-blendings, each of which is a Dupin cyclide-based blending between one of the two quadrics and a circular cylinder, thus enabling the direct computation of the two Dupin cyclide patches and offering better flexibility for shape composition. Our approach uses rational quadric Bezier curves to model the relevant arcs of the principal circles of Dupin cyclides. It is quite general and we have successfully used it for the blending of several n…
Technology and Architectural Heritage: Dynamic Connections
2019
Technological aspects strongly characterise the built environment in both material and immaterial dimensions. The architectural heritage (the built environment that has acquired cultural meanings, without prejudice regarding the age and the scale of observation) offers a peculiar point of view for dealing with this issue. This paper outlines the dynamic connections between technology, the whole idea of architectural heritage and the approaches to intervention. A focus is placed on four main theoretical aspects, the effects of which are also significant on the practical field: the distance from contemporaneity; the concept of Time; reliable conservation; sustainability. The technological evo…
From Revolution to Elections. A Comparative Analysis of Tunisia and Egypt
2017
AbstractPolitical participation is far from being a trivial issue. The focus of this paper will be on two dissimilar acts of political participation in the context of the Arab Spring: revolution and elections. In detail, I will first describe participants in revolution and elections – who they are and why they do participate – to then analyse the link (if any) between revolution and electoral participation. This study will develop a comparison between the cases of Tunisia and Egypt. The findings will illustrate that Tunisian insurgents are more likely to vote in post-revolution elections when compared to their Egyptian fellows, and that this is consistent with the events in the aftermath of…
¿Revuelta de Masaniello o revolución de Nápoles? Una reinterpretación
2020
Between 7 and 16 July 1647 a popular revolt, led by a young fishmonger, Masaniello, shook the city of Naples. The killing of Masaniello, however, did not lead to the end of the riots. On the contrary, the revolt involved the entire kingdom of Naples, radicalized in an anti-Spanish sense and resulted in the proclamation of the Republic and the call of a French prince, the Duke of Guisa. On these events, and especially on the fracture that permanently opposed people and nobles, historiography has long debated. It is possible, however, today, also on the basis of new archival documents, to propose a different interpretation of the events, which integrates the two moments and allows an updated …
Chile Revolts: From the Uprisings to the Constitutional Process
2022
It is a warm, austral spring Monday in the Capital of Chile. Metro stations are tingling with students and workers ready to encapsulate themselves in underground trains to commute as usual. The ticket fee has just been raised by 30 pesos. A group of young people decide to protest evading the fare. Placing their hands on the turnstile columns, one by one, they leap over the metal bar. This small gesture of disobedience spreads and intensifies with tremendous speed. On October 18, 2019, the government orders to close the entire Santiago subway. It is the day designated as the incipit of the estallido social, the Chilean social outbreak. This modest pretext is the fuse that set off a far-reach…