Hyperfine Quenching of the 4s4p3P04s4p ^{3}P_{0} Level in Zn-like Ions

In this paper, we used the multiconfiguration Dirac-Fock method to compute with high precision the influence of the hyperfine interaction on the $[Ar]3d^{10} 4s4p ^3P_0$ level lifetime in Zn-like ions for stable and some quasi-stable isotopes of nonzero nuclear spin between Z=30 and Z=92. The influence of this interaction on the $[Ar]3d^{10} 4s4p ^3P_1 - [Ar]3d^{10} 4s4p ^3P_0$ separation energy is also calculated for the same ions

New expression for the K-shell ionization

A new expression for the total K-shell ionization cross section by electron impact based on the relativistic extension of the binary encounter Bethe (RBEB) model, valid from ionization threshold up to relativistic energies, is proposed. The new MRBEB expression is used to calculate the K-shell ionization cross sections by electron impact for the selenium atom. Comparison with all, to our knowledge, available experimental data shows good agreement

Analysis of X-ray spectra emitted from laser-produced plasmas of uranium

In this paper, we used the multiconfiguration Dirac-Fock method to generate theoretical X-ray spectra for Co-, Ni-, Cu-, Zn-, Ga-, Ge-, As-, Se-, Br-, Kr-, and Rb-like uranium ions. Using the distribution of these ions in a laser-produced plasma, for different plasma temperatures, we generate theoretical spectra, which are compared to experimental data

Mostra "Le vie del Compasso d'Oro - XXI Triennale Milano", Campus Bovisa - Politecnico di Milano

II Premio Compasso d‘Oro ADI è il massimo riconoscimento italiano al progetto, al prodotto, alla ricerca di disegno industriale. È stato istituito a Milano nel 1954 dai grandi magazzini la Rinascente per incentivare l’“estetica del prodotto” e il nascente design italiano. Il marchio del premio, che fa riferimento al compasso di Adalbert Göringer e alla proporzione aurea, è stato disegnato dal grafico Albe Steiner, mentre il compasso d’oro tridimensionale è a firma degli architetti Alberto Rosselli e Marco Zanuso. Successivamente il premio è stato ceduto da la Rinascente all’ADl Associazione per il Disegno Industriale, che ogni tre anni ne cura l’organizzazione attraverso le selezioni di una giuria internazionale. Una preselezione dei prodotti è condotta dai 150 esperti dell’Osservatorio Permanente del Design, che pubblica l’annuario ADI Design Index: dal 1954 al 2014 sono stati esaminati più di 30.000 pezzi, sono stati assegnati 313 Premi Compasso d’Oro, 103 Premi alla carriera, 1.819 Menzioni d’Onore e 71 Targhe Giovani. In questa mostra sono presentati i premi e le menzioni ottenuti dalla Scuola del Design e dal Dipartimento di Design del Politecnico di Milano negli ultimi anni.The ADI Compasso d’Oro Award is universally regarded as the supreme accolade for originality, excellence, achievement and research in industrial design. Created in 1954 by the la Rinascente department store in Milan to encourage product aesthetics, the award’s logo - a reference to the compass invented by Adalbert Göringer to measure the golden section - was designed by Albe Steiner, while the trophy is the work of Alberto Rosselli and Marco Zanuso. The award subsequently passed from I a Rinascente to ADI, which organises the award once every three years. Every year, the Permanent Design Observatory, a team of more than 150 design experts, selects the finest of Italian design for the annual ADI Design Index, the basis on which an International jury then confers the Compasso d’Oro Awards once every three years. Since 1954, more than 30,000 items have been examined, 313 Compasso d’Oro Awards and 103 Compasso d’Oro Carreer Awards presented, and 1,819 Honorable Mentions and 71 Targhe Giovani attributed. In this exhibition are presented the prizes and mentions obtained by the School of Design and by the Department of Design of the Politecnico di Milano over the last few years

Numerical models for 2D free boundary analysis of groundwater in slopes stabilized by drain trenches

AbstractA numerical model for 2D free boundary analysis of groundwater in slopes stabilized by drain trenches has been developed. It consists of a front-tracking method (based on an original way of adapting the space derivatives), very effective in saving calculation time respect to classical fix-grid methods. The method analyses the trenches effect inside slopes in which the soils above the water table are partially saturated, for which a boundary can be recognized between the saturated domain (water table) and the unsaturated one (above the water table). In this case pore pressure lowering, due to trenches, can be analyzed considering the progressively reduction of the saturated domain. This approach efficiently solves the problem of fixing hydraulic boundary conditions on the sides of the trenches. Results have been compared with those obtained by a fix-grid method, observing difference less than 0.14%. Applying the method, the capability of drain trenches to control the effect of heavy rainfalls has been investigated, calculating (during the transient process of water table lowering) limit values of water recharge for which water table keeps on constant