In materials, certain approximated symmetry operations can exist in a lower-order approximation of the effective model but are good enough to influence physical responses system, and these symmetries were recently dubbed "quasi-symmetries" \cite{guo_arxiv_2021}. this work, we reveal hierarchy structure quasi-symmetries corresponding nodal structures that they enforce via two different approache...

EB/FD Perche secondo te l’Unione Europea ha voluto emanare un regolamento relativo alla protezione dei dati personali (il cosi detto GDPR), dal momento che gia esisteva una direttiva europea sulla dati, recepita da tutti i paesi dell’Unione? GB Prima di rispondere vostra domanda, vorrei fare passo indietro e ricordare perche era stata adottata la menzionate. L’esigenza proteggere con normativa ...

We report the current-voltage behavior for nanoscale point contacts to Si(111) obtained in ultrahigh vacuum using scanning tunneling microscopy. Epitaxial CoSi(2) islands provide single-crystal contacts with well-defined size and shape. The zero bias conductance is found to be independent of the island size (10(2)-10(4) nm(2)) and shape, but varies strongly with the surface Fermi level position...

Della Corte, V.; Rotundi, A.; Accolla, M.; Sordini, R.; Palumbo, P.; Colangeli, L.; Lopez-Moreno, J. J.; Rodriguez, J.; Rietmeijer, F. J. M.; Ferrari, M.; Lucarelli, F.; Mazzotta Epifani, E.; Ivanovski, S.; Aronica, A.; Cosi, M.; Bussoletti, E.; Crifo, J. F.; Esposito, F.; Fulle, M.; Green, S. F.; Gruen, E.; Herranz, M. L.; Jeronimo, J. M.; Lamy, P.; Lopez Jimenez, A.; McDonnell, J. A. M.; Menn...

Breastfeeding is a classic aspect of health, which has benefits for both children and mothers in the long short terms. In Europe, obesity epidemic becomes an urgent problem needed to be solved. Recent research indicates that prolonging breastfeeding time would reduce proportion overweight. been seen as protective factor. this article, we make secondary analysis data from several European countr...