Publications database

We present the analysis of the stationary equilibria and their stability in case of an opinion formation process in presence of binary opposite opinions evolving according to majority-like rules on social networks. The starting point is a kinetic Boltzmann-type model derived from microscopic interactions rules for the opinion exchange among individuals holding a certain degree of connectivity. [...]

We present the analysis of stationary equilibria and their stability in the case of an opinion formation process in the presence of binary opposite opinions evolving according to majority-like rules on social networks. The starting point is a kinetic Boltzmann-type model implementing microscopic interaction rules that can be either binary or ternary for the opinion exchange among individuals holding a certain degree of connectivity. [...]

As a generalization of graphs, hypergraphs are widely used to model higher-order relationsin data. This paper explores the benefit of the hypergraph structure for the interpolationof point cloud data that contain no explicit structural information. [...]

We report the first direct experimental observations of resonance island formation in a hybrid multibend achromat (HMBA) storage ring lattice. Using a low-emittance electron beam, we achieved high-precision measurements that resolve the onset, evolution, and transient dynamics of particle capture near resonance islands. [...]

Traditional x-ray photoelectron spectroscopy (XPS) relies upon a direct mapping between the photoelectron binding energies and the local chemical environment, which is well characterized by an electrostatic partial charges (PC) model for systems in equilibrium. However, the extension of this technique to out-of-equilibrium systems has been hampered by the lack of x-ray sources capable of accessing multiple atomic sites with high spectral and temporal resolution, as well as the lack of simple theoretical procedures to interpret the observed signals. [...]

Selenium hyperaccumulators are plants able to accumulate over 1000 μg selenium g−1 in their shoots while growing in their natural environments. The most studied selenium hyperaccumulators are Astragalus bisulcatus, Neptunia amplexicaulis (Fabaceae), and Stanleya pinnata (Brassicaceae). [...]

Nonlinear spectroscopic techniques using entangled photon pairs can provide an opportunity to exploit non-classical correlations encoded in two-photon wave functions to manipulate two-exciton wave functions. We propose an entangled photon pair-enhanced multidimensional spectroscopic technique that is sensitive to exciton–exciton interactions and correlations at the femtosecond timescale. [...]

The ID11-L HESEB Soft X-ray beamline and end station significantly enhance soft X-ray research capabilities. Operating in an energy range of 90–1800 eV, extendable to 70–2000 eV, the beamline achieves high performance with an energy resolution of E/ΔE > 8000 and a photon flux of 10$^{10}$ to 3.4 × 10$^{12}$ photons/s. [...]

The TR-XPES (Time Resolved X-Ray Photoelectron Spectroscopy) setup is the first experimental station integrated at the Soft X-ray Port (SXP) instrument of the European XFEL. It has been developed to perform femtosecond time resolved photoelectron spectroscopy experiments on solid state samples in the soft X-ray photon energy range from 0.25 keV to 3 keV, generated by the SASE3 undulator system. [...]

In a coherent scattering experiment, one of the important experimental parameters is the speckle visibility, which can be changed by adjusting the size of the X-ray beam on the sample. Focussing optics provide therefore a convenient tool to increase the speckle visibility, while simultaneously increasing the flux density and thus the dose on the sample. [...]