Studio di 186 protesi valvolari di Medtronic Hall-TM impiantate su 171 pazienti dal 1980 al 1985

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Revisiting the omnes et singulatim bond: The production of irregular conducts and the biopolitics of the governed

This article starts from the non-juridical meaning of subjectivity that counter-conducts entail and from the asymmetrical forms of refusal they generate. Foucault’s understanding of counter-conducts as productive practices, internal to the regime of norms that they oppose, enables analysing struggles and modes of life that were not defined by Foucault in these terms, or those counter-conducts that are more recent. In the first section, the article engages with the meaning of “counter-conduct,” situating it within the omnes et singulatim nexus, interrogating how the level of multiplicities is at stake in contemporary forms of counter-conduct. Then, it focuses on The Punitive Society, showing that the modes of life and strategies of flight against the capitalist system described by Foucault allow us to grasp the excess of discordant conducts with respect to technologies of power that try to discipline them. In the final section, the article explores the entanglement between singularities and multiplicities at play in the government of refugees, focusing on the spatial disobedience enacted by rejected refugees at Choucha refugee camp in Tunisia. Refugees’ strategic embracement of the condition of subjects eminently governed by the humanitarian rationale illuminates a form of biopolitics of the governed

Interplay between local and international journals: The case of Sicily, 1880–1920

International audienceIn 1884, Giovan Battista Guccia founded first the Circolo Matematico di Palermo and then some years later its journal, the Rendiconti del Circolo Matematico di Palermo. Although historians of mathematics have published a number of works on the Circolo and the Rendiconti, there are very few systematic studies on mathematics in Sicilian periodicals. In our paper, we shall investigate the relationships between the “international” Rendiconti and the “local” proceedings published by the Sicilian academies located in Catania, Messina, and Palermo. What is the image of mathematics that emerges from these journals? What is the presence of Sicilian mathematicians among the authors in the different cases? May we recognize a Sicilian dynamics in mathematics and, if so, in what sense?Nel 1884 Giovan Battista Guccia fonda il Circolo Matematico di Palermo e qualche anno dopo il suo giornale, Rendiconti del Circolo Matematico di Palermo. Sebbene gli storici della matematica abbiano pubblicato un certo numero di lavori sul Circolo e sui Rendiconti, gli studi sistematici concernenti la matematica nei periodici siciliani sono molto pochi. In questo articolo cerco le relazioni tra il giornale “internazionale” Rendiconti e i “locali” Atti pubblicati dalle accademie siciliane situate a Catania, Messina e Palermo. Qual è l'immagine della matematica che emerge da questi giornali? Qual è la presenza dei matematici siciliani tra gli autori nei diversi giornali? Possiamo individuare una dinamica siciliana in matematica e in che senso

Governing refugees through disorientation: Fragmented knowledges and forced technological mediations

This article investigates the fragmented knowledges that migrants need to deal with in order to get access to asylum, and the related effects of disorientation it generates on them. The piece argues that disorientation is as a constitutive political technology of refugee governance and develops this argument by focusing on the Greek asylum system. It starts by drawing attention to the multiple technological steps and forced digital intermediations that asylum seekers in Greece need to navigate, focusing in particular on the Cash Assistance Programme, and it shows how asylum seekers need to deal with dispersed knowledges. The article moves on by analysing how the governing through disorientation underpin the asylum legal system in Greece and how this ends up in debilitating asylum seekers and hampering them from accessing rights and humanitarian support. The final section explores how asylum seekers are racialised and treated as deceitful subjects, and argues that not only their speech but also their conduct and behaviour are assumed to be deceptive, and therefore their knowledge turns out to be pointless. It concludes by challenging claims for more transparency and more knowledge as a response to the governing through disorientation

The making of racialized subjects: Practices, history, struggles

My intervention advances two related methodological and epistemic pathways. First, it foregrounds heterogeneous biopolitical technologies connected but not limited to security and humanitarianism, and warns against the dehistoricization of migrants and refugees. Second, going beyond an exclusive focus on representation and discourses, it draws attention to racializing administrative and legal practices. In the conclusion, I draw attention to anti-racist struggles and coalitions, arguing that a political reading of racialized security practices should start from that. Indeed, engaging with the partial neglect of race in international relations ‘is more than simply a matter of talking about race’ (Gupta and Virdee, 2018: 1748). Nor should an insight into racialization be incorporated just as a corrective to the Eurocentrism of critical security studies. Here, I mobilize racialization as a referent to scrutinize recursive security practices and, at the same time, to shed light on the history of anti-racist transversal struggles

Green's Function in Some Contributions of 19th Century Mathematicians

AbstractMany questions in mathematical physics lead to a solution in terms of a harmonic function in a closed region with given continuous boundary values. This problem is known as Dirichlet's problem, whose solution is based on an existence principle—the so-called Dirichlet's principle. However, in the second half of the 19th century many mathematicians doubted the validity of Dirichlet's principle. They used direct methods in order to overcome the difficulties arising from this principle and also to find an explicit solution of the Dirichlet problem at issue. Many years before, one of these methods had been developed by Green in 1828, which consists in finding a function—called a Green's function—satisfying certain conditions and appearing in the analytical expression of the solution of the given Dirichlet problem. Helmholtz, Riemann, Lipschitz, Carl and Franz Neumann, and Betti deduced functions similar to Green's function in order to solve problems in acoustics, electrodynamics, magnetism, theory of heat, and elasticity. Copyright 2001 Academic Press.Molte questioni fisico matematiche conducono a una soluzione in termini di una funzione armonica in una regione chiusa con dati valori continui al contorno. Questo problema è noto come problema di Dirichlet, la cui soluzione si basa su un principio di esistenza, il cosiddetto principio di Dirichlet. Tuttavia, nella seconda metà del diciannovesimo secolo, molti matematici cominciarono a mettere in dubbio la validità del principio di Dirichlet. Sia per superare le difficoltà sorte da tale principio, sia per trovare una soluzione esplicita del problema di Dirichlet dato, essi presero ad adoperare metodi diretti. Molti anni prima, uno di questi metodi era stato sviluppato da Green nel 1828 e consiste nel trovare una funzione, detta funzione di Green, che soddisfa certe condizioni e mediante la quale si rappresenta analiticamente la soluzione del problema di Dirichlet in questione. Helmholtz, Riemann, Lipschitz, Carl e Franz Neumann, e Betti dedussero delle funzioni simili alla funzione di Green allo scopo di risolvere problemi di acustica, elettrodinamica, magnetismo, teoria del calore ed elasticità. Copyright 2001 Academic Press.Nombreuses questions de physique mathématique mènent à une solution en termes d'une fonction harmonique dans une région fermée avec des valeurs continus donnés sur la frontière. Ce problème est connu comme problème de Dirichlet, la solution duquel est fondée sur un principe d'existence, le principe de Dirichlet. Cependant dans la seconde moitié du dix-neuvième siècle plusieurs mathématiciens mirent en doute la validité du principe de Dirichlet. Alors ils employèrent des méthodes directes soit pour surmonter le difficultés nées de ce principe, soit pour déduire une solution explicite du problème de Dirichlet en question. Avant plusieurs annèes une de ces méthodes a été développée par Green en 1828 et consiste à trouver une fonction, dite fonction de Green, qui satisfait certaines conditions et moyennant laquelle on représente analytiquement la solution du problème de Dirichlet donné. Helmholtz, Riemann, Lipschitz, Carl et Franz Neumann, et Betti déduisirent des fonctions semblables à la fonction de Green pour résoudre de problèmes d'acoustique, électrodynamique, magnétisme, théorie de la chaleur et élasticité. Copyright 2001 Academic Press.MSC 1991 subject classifications: 01A55, 31-03

The politics of migrant dispersal. Policing and dividing migrant multiplicities

This article focuses on the politics of migrant dispersal that has been enforced in Europe for regaining control over ‘unruly’ migrants’ presence and movements, with a specific focus on the French and on the Italian contexts. The article shows that dispersal can be considered as a spatial strategy of governmentality and that far from being a new policy, it was already adopted to manage former colonised populations. The article argues that strategies of migrant dispersal are today enacted by state authorities, in collaboration with humanitarian actors, for troubling migrants’ presence and autonomous movements, as well as for disrupting and dividing temporary migrant collective formations. First, it retraces a colonial genealogy of dispersal, as a political technology used for disciplining unruly populations. Then, it analyses how dispersal strategies have been put into place in France (Calais and Paris) and in Italy (Ventimiglia) not only by scattering migrants across space but also by dismantling migrant spaces of life (‘lieux de vie’). The article moves on demonstrating that the politics of dispersal is mainly enforced for preventing the consolidation of migrant multiplicities, criminalising them as ‘migrant mobs’ and spatially dividing them. The third section of the article brings attention to the effects of migrants’ forced hypermobility and to the convoluted geographies that dispersal triggers. It concludes by bringing attention to the increasing criminalisation of migrant support networks that try to prevent the dismantling of migrant autonomous spaces

A “Passport to Freedom”? COVID-19 and the Re-bordering of the World

This paper argues that COVID-19 has triggered a multiplication of heterogeneous bordering mechanisms that, far from stopping movement as such, have enhanced hierarchies of mobility. In particular, it shows that a confinement continuum has been put in place in the name of the “contain to protect” principle: migrants have been subjected to protracted lockdown measures in the name of their own protection. The piece concludes by interrogating how to rearticulate critique in COVID times in light of the enforcement of discriminatory “passports to freedom” (COVID-19 travel certificates)

The temporal borders of asylum. Temporality of control in the EU border regime

This article argues that refugees’ confinement is enforced through a combination of spatial tactics which restrict mobility and modes of governing by choking lifetime. Focusing on the Greek context, it contends that asylum seekers are entrapped in a sort of (in)dependency conundrum: they are expected to be self-reliant, and they are blamed for being pampered, but they are simultaneously disrupted insofar as they do autonomous social reproduction activities and build autonomous spaces of liveability. The piece starts by exploring the nexus between asylum procedure, carceral mechanisms and politics of confinement: it highlights that people who seek asylum in Greece are at risk of being detained or being declared inadmissible to the asylum procedure. It moves on to investigate the (in)dependency conundrum, taking into account the ways in which refugees choked: it shows that asylum seekers are deprived both of socio-economic independence and of humanitarian-financial support. It suggests that to be withheld is also their future and that this should be conceived as a form of injury and debilitation. The final section illustrates how asylum seekers stranded in camps have organised collective struggles to protest the suspension of food and financial support, and to claim right to education and to access to public transport. By starting from precise demands, refugees have articulated expansive claims that exceed minimalistic biopolitics

Which Europe?: Migrants’ uneven geographies and counter-mapping at the limits of representation

Looking at three snapshots of migrant struggles in Europe, this paper deals with the limits and the challenges of representing migration. Starting from that, it investigates the theoretical and political challenges of mapping migration – both as a cartographic practice and as a form of narrative. The article mobilizes a counter-mapping analytics which looks at the European space through the spatial transformations generated by migration movements