A5030262640- Quantum, superfluid, helium dynamics
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum chaos and dynamical systems
- Polymer crystallization and properties
- biodegradable polymer synthesis and properties
- Polymer Nanocomposites and Properties
- Spectroscopy and Quantum Chemical Studies
- Migration, Refugees, and Integration
- Surfactants and Colloidal Systems
- Advanced optical system design
- Social Sciences and Policies
- High-pressure geophysics and materials
- Business and Management Studies
- Geographies of human-animal interactions
- Protein Interaction Studies and Fluorescence Analysis
- Phase Equilibria and Thermodynamics
- Acoustic Wave Phenomena Research
- Photonic and Optical Devices
- Material Properties and Processing
- Advanced Polymer Synthesis and Characterization
- High voltage insulation and dielectric phenomena
- Crime, Deviance, and Social Control
- Optical Coatings and Gratings
Sapienza University of Rome
2023-2024
University of Milan
1995
The atomic motion controls important properties of materials, such as thermal transport, phase transitions, and vibrational spectra. However, simulating the ionic dynamics is exceptionally challenging when quantum fluctuations are relevant (e.g., at low temperatures or with light atoms) energy landscape anharmonic. In this paper, we present time-dependent self-consistent harmonic approximation (TDSCHA) [L. Monacelli F. Mauri, Phys. Rev. B 103, 104305 (2021)] in Wigner framework, paving way...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMiscibility and Thermal Crystallization Behaviors of Poly(D-(-)-3-hydroxybutyrate)/Atactic Poly(methyl methacrylate) BlendsA. Siciliano, A. Seves, T. De Marco, S. Cimmino, E. Martuscelli, C. SilvestreCite this: Macromolecules 1995, 28, 24, 8065–8072Publication Date (Print):November 1, 1995Publication History Published online1 May 2002Published inissue 1 November...
The thermal and mechanical properties of blends, obtained by mixing polyamide 6 (PA6) an amorphous aromatic copolyamide G21 (ISO nomenclature PA 6I/6T), were investigated differential scanning calorimetry, dynamic analysis, tensile tests. Quenched blends show a single glass transition temperature; the Tg-composition trend was interpreted means Gordon–Taylor equation. half-time crystal-lization decreases increasing content this indicates depression overall crystallization rate. A small...
Abstract A simple mathematical procedure for the estimation of water vapour transmission rate under different conditions is presented and discussed. The ASTM dynamic gravimetric methods were used measuring four thin plastic films (PET 19 μm, PVC 16 EVA 15 μm LDPE 23 μm) 38 temperature relative humidity corresponding permeance values drawn. On basis Clausius Clapeyron's relationship between pressure, a equation was derived rapid transformation data. applied to data collected good agreement...
The Self-Consistent Harmonic Approximation (SCHA) describes atoms in solids, including quantum fluctuations and anharmonic effects, a non-perturbative way. It computes ionic free energy variationally, constraining the atomic quantum-thermal to be Gaussian. Consequently, entropy is analytical; there no need for thermodynamic integration or heavy diagonalization include finite temperature effects. In addition, as probability distribution fixed, SCHA solves all equations with Monte Carlo...
The atomic motion in molecular crystals, such as high-pressure hydrogen or hybrid organic-inorganic perovskites, is very complex due to quantum anharmonic effects. In addition, these materials accommodate rotational degrees of freedom. All the approximate methods that describe nuclei thermodynamics using Cartesian coordinates lead an unphysical hybridization roto-librations with other high-energy modes. Hence, they do not accurately account for free energy contributions So, a reliable...
The numerical solution of the many-body problem interacting electrons and ions beyond adiabatic approximation is a key challenge in condensed matter physics, chemistry, materials science. Traditional methods to solve multi-component quantum Hamiltonian tend be specialized or can suffer from methodological gap when applied both simultaneously. In addition, ionic techniques often limited as $T\to$ 0K, whereas electronic are designed for 0K. Thus, efficient strategies that simultaneously...
Abstract A fully saturated, alicyclic hydrocarbon resin (IST) was blended with isotactic polypropylene (iPP). IST is a random co‐oligomer of low average molecular weight obtained by oligomerization indene, α‐methyl styrene and vinyl toluene, followed hydrogenation. The crystallization thermal behaviour iPP/IST blends were analyzed microscopy differential scanning calorimetry (DSC). influence blend composition on the spherulite growth rate overall suggests that two components form miscible in...
The atomic motion controls important features of materials, such as thermal transport, phase transitions, and vibrational spectra. However, the simulation ionic dynamics is exceptionally challenging when quantum fluctuations are relevant (e.g., at low temperatures or with light atoms) energy landscape anharmonic. In this work, we formulate Time-Dependent Self-Consistent Harmonic Approximation (TDSCHA) in Wigner framework, paving way for efficient computation nuclear systems sizable...
Over the past decade, thousands have been recorded dead or missing after attempting to cross sea from north Africa southern Europe. In contrast governmental apathy this plight, behind these people are those who steadfastly remain in search, demanding answers and seeking closure. Drawing on an intimate engagement with Tunisian families involved activism, article highlights tripartite lacuna within which they find themselves: The slipping of their sons into black box intercontinental “illegal”...