Cercueils fluides

Tu t’alourdis toi-même Avec des idées fausses et ne peux voir Choses que tu verrais, si tu les secouais. (Dante, Paradis, I, 88-90) I- Des migrants africains meurent de l’autre côté de l’océan (Associated Press, vendredi 2 juin 2006) Ils ont quitté l’Afrique la veille de Noël pour partir à la recherche d’une vie meilleure en Europe. Au lieu de cela, le bateau à bord duquel ils se trouvaient a conduit les migrants à la mort, allant à la dérive sur 2000 miles à travers l’Océan Atlantique jusqu’..

Fluidi Feretri

    Tu stesso ti fai grosso Col falso imaginar, sì che non vedi Ciò che vedresti se l’avesti scosso. (Dante, Paradiso, I, 88-90) I Migranti africani muoiono dall’altra parte dell’oceano (Associated Press, venerdi 2 giugno 2006) Hanno lasciato l’Africa la vigilia di Natale alla ricerca di una vita migliore in Europa. Invece, il battello ha condotto i migranti alla morte, andando alla deriva per 2000 miglia nell’Oceano Atlantico fino all’isola caraibica di Barbados. Quando un pescatore ha trova..

Applicative Bisimulation and Quantum λ-Calculi

International audienceApplicative bisimulation is a coinductive technique to check program equivalence in higher-order functional languages. It is known to be sound — and sometimes complete — with respect to context equivalence. In this paper we show that applicative bisimulation also works when the underlying language of programs takes the form of a linear λ-calculus extended with features such as probabilistic binary choice, but also quantum data, the latter being a setting in which linearity plays a role. The main results are proofs of soundness for the obtained notions of bisimilarity

Enhanced performance of longitudinally post-tensioned long-span LVL beams

The scope of this paper is to highlight the advantages of using longitudinally post-tensioning for long-span timber beams compared to traditional glulam or LVL solutions. The analysis is limited to serviceability limit states for gravity loads. An analtycal iterative procedure which takes into account tendon elongation within beam deflecting has been implemented and validated through experimental tests carried out at the University of Canterbury.In particular, two different static configurations have been studied and different tendon profile configurations (straight and draped) internal and external to the beam section have been investigated and compared with traditional solid timber beams. The experimental results confirm the enhanced performance in terms of deflections at serviceability limit state of the longitudinally post-tensioned solutions with respect to traditional timber beams, especially if external draped tendons are adopted

Mobilizing in borderline citizenship regimes : a comparative analysis of undocumented migrants’ collective actions

This article seeks to explain how and why groups and networks of undocumented migrants mobilizing in Berlin, Montréal, and Paris since the beginning of the 2000s construct different types of claims. The authors explore the relationship between undocumented migrants and state authorities at the local level through the concept of the citizenship regime and its specific application to undocumented migrants (which they describe as the “borderline citizenship regime”). Despite their common formal exclusion from citizenship, nonstatus migrants experience different degrees and forms of exclusion in their daily lives, in terms of access to certain rights and services, recognition, and belonging within the state (whether through formally or nonformally recognized means). As a result, they have an opportunity to create different, specific forms of leeway in the society in which they live. The concurrence of these different degrees of exclusion and different forms of leeway defines specific conditions of mobilization. The authors demonstrate how the content of their claims is influenced by these conditions of mobilization

Colonial refractions: the 'Gypsy camp' as a spatio-racial political technology

Camps for civilians first appeared in the colonies. Largely drawing on the literature on colonialism and race, this article conceptualizes the 'Gypsy camp' in Western European cities as a spatio-racial political technology. We first discuss the shift, starting with decolonization, from colonial to metropolitan technologies of the governance of social heterogeneity. We then relate this broad historical framing to the ideas and ideologies that since the 1960s have been underpinning the planning and governance of the ‘Gypsy camp' in both the UK and Italy. We document the 1970s emergence of a new and distinctive type of camp that was predicated upon a racially connoted tension between policies criminalizing sedentarization and ideologies of cultural protection. Given that the imposition of the ‘Gypsy camp' was essentially uncontested, we argue that the conditions of possibility for it to emerge and become institutionalized were both a spatio-racial similarity with typically colonial technologies of governance, and the fact that it was largely perceived as a self-evident necessity for the governance and control of one specific population. We conclude by calling for more analyses on this and other forms of urban confinement in both the Global North and South, in order to account for the increasingly disquieting mushrooming of confining and controlling governance devices, practices and ideologies

Multi-messenger observations of a binary neutron star merger

On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected a gamma-ray burst (GRB 170817A) with a time delay of ~1.7 s with respect to the merger time. From the gravitational-wave signal, the source was initially localized to a sky region of 31 deg2 at a luminosity distance of 40+8-8 Mpc and with component masses consistent with neutron stars. The component masses were later measured to be in the range 0.86 to 2.26 Mo. An extensive observing campaign was launched across the electromagnetic spectrum leading to the discovery of a bright optical transient (SSS17a, now with the IAU identification of AT 2017gfo) in NGC 4993 (at ~40 Mpc) less than 11 hours after the merger by the One- Meter, Two Hemisphere (1M2H) team using the 1 m Swope Telescope. The optical transient was independently detected by multiple teams within an hour. Subsequent observations targeted the object and its environment. Early ultraviolet observations revealed a blue transient that faded within 48 hours. Optical and infrared observations showed a redward evolution over ~10 days. Following early non-detections, X-ray and radio emission were discovered at the transient’s position ~9 and ~16 days, respectively, after the merger. Both the X-ray and radio emission likely arise from a physical process that is distinct from the one that generates the UV/optical/near-infrared emission. No ultra-high-energy gamma-rays and no neutrino candidates consistent with the source were found in follow-up searches. These observations support the hypothesis that GW170817 was produced by the merger of two neutron stars in NGC4993 followed by a short gamma-ray burst (GRB 170817A) and a kilonova/macronova powered by the radioactive decay of r-process nuclei synthesized in the ejecta