576 research outputs found
Phase separation in the 2D Hubbard model: a fixed-node quantum Monte Carlo study
No full textFixed-node Green's-function Monte Carlo calculations have been performed for very large 16x16 two-dimensional Hubbard lattices, large interaction strengths U=10,20, and 40, and many (15 similar to 20) densities between empty and half-filling. The nodes were fixed by a simple Slater-Gutzwiller trial wave function. For each value of U we obtained a sequence of ground-state energies which is consistent with the possibility of a phase separation close to half-filling, with a hole density in the hole-rich phase which is a decreasing function of U. The energies suffer, however, from a fixed-node bias: more accurate nodes are needed to confirm this picture. Our extensive numerical results and their test against size, shell, shape, and boundary-condition effects also suggest that phase separation is quite a delicate issue, on which simulations based on smaller lattices than considered here are unlikely to give reliable predictions. RI Capone, Massimo/A-7762-2008; Guidoni, Leonardo/G-3759-201
«Preferirebbe buttar via il nome». L’evasione dal principium individuationis del nome e dall’identità in ‘Rubè’ di Borgese
No full textThe paper highlights the remarkable pregnancy, in thematic, ideological, formal and
even structural terms, of names in Rubè (1921), a novel by Giuseppe Antonio Borgese, focusing on
the troublesome relationship that the main character Filippo Rubè establishes with them, leading
to an identity crisis. Capone identifies five modes of using names in Rubè: the escape from the principium
individuationis of the name as an ideological breakout from the chains of a fixed identity; the
intentional modifications of his name made by Rubè in order to avoid his registry and social identity
and, thus, to be able to escape from the duties of ordinary life; the change of the names of the women
loved by Filippo; some irreversible plot twists brought about by proper names; the inability to give
adequate names to blurred feelings. By the analysis of these uses, the author points out how many
times in Rubè not just nomina sunt consequentia rerum, but res sunt consequentia nominum as well
Learning Design Strategies in MOOCs for Physicians’ Training: A Scoping Review
No full textIn recent years, there has been an increased implementation of massive open online courses (MOOCs). This teaching model plays a pivotal role in online education because it can provide high-quality learning resources to numerous students with great feasibility, shaping training courses according to their different learning requirements. Although the widespread adoption of MOOCs in medical education has led to numerous benefits for undergraduate and graduate doctors, their role remains unclear, suggesting the need to analyze the key factors of such a learning method in this field. To achieve this aim, a scoping review, in line with the PRISMA method for qualitative synthesis, was performed by considering studies published from 2016 to 2021, written in English, and including the physician population. Through this literature analysis, the following main areas of interest came to light: (1) pedagogical approaches, (2) MOOC structure-related variables, (3) participant-related variables, and (4) MOOCs vs. traditional courses. The review provides valuable evidence on factors underlying MOOCs effectiveness, which might be helpful for academic and healthcare organizations in designing effective training courses for physicians
Investigating the transfer process of MOOC content in healthcare through the theory of planned behaviour
No full textIn-Thing Purchase: la nascita di un nuovo mercato
No full textSeguendo il paradigma dello Smart Connected Product, ambiti di innovazione digitale come la smart mobility, la smart home e lo smart manufacturing hanno visto negli ultimi anni profondi cambiamenti, con la costruzione di nuovi ecosistemi che cooperano per completare la proposizione di valore del prodotto connesso (Porter e Heppelman, HBR 2014). Sta ora emergendo un nuovo paradigma di mercato – che denomineremo In-Thing Purchase (ITP) - che sta ulteriormente trasformando il prodotto intelligente in un canale di vendita attraverso cui proporre al cliente funzionalità di prodotto innovative
Recensione “Destini Tecnologici dell’Immaginazione" (2022, Mimesis), Pietro Montani
No full textRecensione del volume: Pietro Montani, Destini tecnologici dell’immaginazione, Mimesis, Sesto S. Giovanni 2022
Interactions between fluid and fibers in a turbulent backward-facing step flow
No full textIn this work, a turbulent backward-facing step flow at Reynolds number ReH
= 17 520, laden with rod-like particles, is investigated by means of particle image
velocimetry. Particle loadings tested are within 0.02% and 0.05% volume fractions;
thus, the suspensions may be considered as dilute. The high spatial resolution
allows the identification of fiber orientation within the flow, so that mutual interactions
between phases can be investigated by considering flow modifications and
phenomena related to preferential concentration and orientation of fibers. Fibers’
concentration data show a moderate trend to accumulate at the channel centreline,
whereas orientation data display a strong preferential orientation of fibers.
Specifically, the local fibers’ orientation is correlated to the flow field in terms of
mean flow direction and plane of maximum shear. The occurrence of a symmetrical
orientation profile with respect to the channel centre-line is reported as well as the
tendency to recover such profile downstream of the step
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