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    Ethnographer as Bricoleur: Making, Unmaking, and Remaking Boundaries in Field Research

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    info:eu-repo/semantics/nonPublishe

    Protecting Child and the Catholic Family: Catholic Women’s League and Preventive Medicine Clinics for Mothers and Infants in Belgium (1945-1975)

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    This article examines a twofold specificity in circumstances that was brought about by the intervention of the Catholic Women’s League in the Belgian mother and infant welfare system between 1945 and 1975: the importance of religion and the central role of women volunteers in state-funded medical-social facilities. For the Women’s League, the infant clinics were a means of defending Catholic positions on the family and birth control on the ground, and of asserting its legitimacy to intervene in child protection policies. After 1945, the women who volunteered in the clinics took on apostolic missions, but also contributed to the medicalisation of children’s education. Protected by the Women’s League, they occupied rather unusual positions of authority. The article explores how the League succeeded in maintaining the presence of volunteers by creating new social services and missions when the medical and religious missions of clinics were changing in the early 1960s.info:eu-repo/semantics/inPres

    Neural network quantum states for the interacting Hofstadter model with higher local occupations and long-range interactions

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    Due to their immense representative power, neural network quantum states (NQS) have gained significant interest in current research. In recent advances in the field of NQS, it has been demonstrated that this approach can compete with state-of-the-art numerical techniques, making NQS a compelling alternative, in particular for the simulation of large, two-dimensional (2D) quantum systems. In this study, we show that recurrent neural network (RNN) wave functions can be employed to study systems relevant to current research in quantum many-body physics. Specifically, we employ a 2D tensorized gated RNN to explore the bosonic Hofstadter model with a variable local Hilbert space cutoff and long-range interactions. At first, we benchmark the RNN-NQS for the Hofstadter-Bose-Hubbard (HBH) Hamiltonian on a square lattice. We find that this method, despite the complexity of the wave function, is capable of efficiently identifying and representing most ground-state properties. Afterwards, we apply the method to an even more challenging model for current methods, namely, the Hofstadter model with long-range interactions. This model describes Rydberg-dressed atoms on a lattice subject to a synthetic magnetic field. We study systems of size up to 12×12 sites and identify three different regimes by tuning the interaction range and the filling fraction ν. In addition to phases known from the HBH model at short-range interaction, we observe bubble crystals and Wigner crystals for long-range interactions. Especially interesting is the evidence of a bubble crystal phase on a lattice, as this gives experiments a starting point for the search of clustered liquid phases, possibly hosting non-Abelian anyon excitations. In our work, we show that NQS are an efficient and reliable simulation method for quantum systems, which are the subject of current research. In particular, we demonstrate the ability of this method to simulate challenging systems with long-range interactions.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

    Migrations, citizenship and administrative borders: the Italian case

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    This contribution summarises the scientific discussions that developed during a one-year cycle of international and interdisciplinary seminars focusing on the relationship between migration and citizenship in Italy. We considered human mobilities in their relation to the politico-administrative institutions of the state and observed the latter's attempt to define and govern them. The relative marginality of the Italian case in the literature about state building, nation building and citizenship is an opportunity to examine these processes with fresh eyes. The first section is a critical analysis of the policies regulating access to Italian citizenship. The second examines the entanglement between external and internal migrations and how they are governed, considering various administrative borders and statuses such as Italian municipal residency. The third section addresses the role of different field actors (from street-level bureaucrats to legal practitioners and activists) in shaping or negotiating the borders of citizenship while implementing the law.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

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