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A lecture hall dedicated to our late friend and colleague Paolo Verrocchio

On June 29th, a lecture hall was dedicated to our late friend and colleague Paolo Verrocchio. The ceremony was held in the PovoZero building, home of the departments of Physics and Mathematics. In the presence of Paolo’s family, the dedication plaque was unveiled by the Rector, prof. Flavio Deflorian, and by prof. Giorgio Parisi, Nobel …

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XVI International Workshop on Complex Systems – Andalo, 13-17 March 2023

The XVI International Workshop on Complex Systems will take place at Andalo (Italy) between the 13th and the 17th of March 2023. More in detail, it will start in the afternoon of Monday the 13th and end at lunchtime on Friday the 17th. Andalo is a beautiful village in the heart of the mountains of Trentino, about 30 km …

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X-ray induced dynamics in borate glasses with different network connectivity

Hard x rays induce atomic dynamics in oxide glasses at doses low enough that the average structure is unchanged. X-ray photon correlation spectroscopy is used here to study this effect in a series of alkali borate glasses characterized by different network connectivity. The product of the x-ray dose rate per atom and the decay time …

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The role of polymer structure on water confinement in poly(N-isopropylacrylamide) dispersions

Poly(N-isopropylacrylamide) (PNIPAM) is a synthetic polymer that is widely studied for its thermoresponsive character. However, recent works also reported evidence of a low temperature (protein-like) dynamical transition around 225 K in concentrated PNIPAM suspensions, independently of the polymer architecture, i.e., both for linear chains and for microgels. In this work, we investigate water-polymer interactions by …

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New insights about the role of Na–K ratio on the vibrational dynamics of synthetic-basalt glasses

Basalts are among the most abundant igneous rocks on Earth. Originated from the rapid cooling of magma erupted by volcanoes, they are increasingly used as raw materials in glass and ceramic technology due to their unique physico-chemical properties. The characteristics of basalts, like the glass transition temperature, are strongly controlled by their structure, which is …

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Estimating the viscosity of volcanic melts from the vibrational properties of their parental glasses

The numerical modelling of magma transport and volcanic eruptions requires accurate knowledge of the viscosity of magmatic liquids as a function of temperature and melt composition. However, there is growing evidence that volcanic melts can be prone to nanoscale modification and crystallization before and during viscosity measurements. This challenges the possibility of being able to …

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Proteinlike dynamical transition of hydrated polymer chains

Combining elastic incoherent neutron scattering experiments at different resolutions with molecular dynamics simulations, we report the observation of a proteinlike dynamical transition in linear chains of poly(N-isopropylacrylamide). We identify the onset of the transition at a temperature Td of about 225 K. Due to a global fit procedure, we find quantitative agreement between measured and …

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Thermal annealing and phase transformation of serpentine-like garnierite

This study is focused on the vibrational and microstructural aspects of the thermally induced transformation of serpentine-like garnierite into quartz, forsterite, and enstatite occurring at about 620 °C. Powder specimens of garnierite were annealed in static air between room temperature and 1000 °C. The kinetic of the transformation was investigated by means of thermogravimetric and …

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Two-Component Dynamics and the Liquidlike to Gaslike Crossover in Supercritical Water

Molecular-scale dynamics in sub-to supercritical water is studied with inelastic X-ray scattering and molecular dynamics simulations. The obtained longitudinal current correlation spectra can be decomposed into two main components: A low-frequency (LF), gaslike component and a high-frequency (HF) component arising from the O-O stretching mode between hydrogen-bonded molecules, reminiscent of the longitudinal acoustic mode in …

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Andalo special Issue on Complex systems

XV International Workshop on Complex systems Andalo (Trento, Italy) – 17-20 March 2019 Philosophical Magazine, Volume 100, Issue 20 (2020) Contents Foreword Giacomo Baldi, Aldo Fontana, Giulio Monaco & Marco Zanatta Page: 2543 Network dilution and asymmetry in an efficient brain Marco Leonetti, Viola Folli, Edoardo Milanetti, Giancarlo Ruocco & Giorgio Gosti Pages: 2544-2555 Mechanistic …

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