Search results for "Icon"
showing 10 items of 3539 documents
The “Circolo Matematico di Palermo” and the First World War: The crisis of scientific internationalism: a view through the unedited correspondence of…
2021
Abstract In this work the situation of the “Circolo Matematico di Palermo” between 1914 and 1928 is analyzed. It will be observed that during this time the Circolo was among the few European scientific associations with German as well as French associates. During the 1930s, the nationalist politics of Fascism and above all the racial laws dealt a deadly blow to the Circolo as an international scientific association. We will use the rich correspondence in the Circolo's archives to shed some light on this. In particular, the correspondence between M. De Franchis and E. Landau and other recently found documents will figure prominently.
Coulomb Excitation of Proton-rich N=80 Isotones at HIE-ISOLDE
2020
Abstract A projectile Coulomb-excitation experiment was performed at the radioactive ion beam facility HIE-ISOLDE at CERN. The radioactive 140Nd and 142Sm ions were post accelerated to the energy of 4.62 MeV/A and impinged on a 1.45 mg/cm2-thin 208Pb target. The γ rays depopulating the Coulomb-excited states were recorded by the HPGe-array MINIBALL. The scattered charged particles were detected by a double-sided silicon strip detector in forward direction. Experimental γ-ray intensities were used for the determination of electromagnetic transition matrix elements. Preliminary results for the reduced transition strength of the B ( M 1 ; 2 3 + → 2 1 + ) = 0.35 ( 19 ) μ N 2 of 140Nd and a firs…
Microfabrication of hybrid fluid membrane for microengines
2015
International audience; This paper describes the microfabrication and dynamic characterization of thick membranes providing a technological solution for microengines. The studied membranes are called hybrid fluid-membrane (HFM) and consist of two thin membranes that encapsulate an incompressible fluid. This work details the microelectromechanical system (MEMS) scalable fabrication and characterization of HFMs. The membranes are composite structures based on Silicon spiral springs embedded in a polymer (RTV silicone). The anodic bonding of multiple stacks of Si/glass structures, the fluid filling and the sealing have been demonstrated. Various HFMs were successfully fabricated and their dyna…
Determination of defect content and defect profile in semiconductor heterostructures
2011
In this article we present an overview of the technique to obtain the defects depth profile and width of a deposited layer and multilayer based on positron annihilation spectroscopy. In particular we apply the method to ZnO and ZnO/ZnCdO layers deposited on sapphire substrates. After introducing some terminology we first calculate the trend that the W/S parameters of the Doppler broadening measurements must follow, both in a qualitative and quantitative way. From this point we extend the results to calculate the width and defect profiles in deposited layer samples.
La iconografía en la era digital: hacia una heurística para el estudio del contenido de las imágenes medievales
2014
Este artículo invita a reflexionar sobre la validez de la iconografía como método para describir los temas representados en las obras artísticas medievales. En esta ocasión, se ha puesto un mayor énfasis en investigar sus implicaciones epistemológicas y los sesgos que resultan del proceso de transformar las imágenes en palabras. El objetivo principal es tratar de que aflore la llamada 'brecha semántica', una especie de barrera que impide representar verbalmente un medio no léxico, como es el visual, de manera satisfactoria y sin mermas. Tras un sucinto recorrido por el pensamiento griego, con un especial interés por la écfrasis, se sugiere que el aparente equilibrio entre las capacidades se…
“A Perfect Heroine in Foreign Travel.” Female Mobile Identities and Southern Italy in the 19th Century Non-feminist Periodical Press
2016
This essay focuses on the inteaction between the publication of female travel writing abouth the South Of Italy in non -feminist 19th century British periodicaldìs and the circulation of a transgressive model of femininity centred on the concepts of mobility, vitality and visibility. the choice of Southern Italy, and anti-tourist destination that since the era of the Grand Tour had been considered dangerous for men, let alone for women, magnifies female heroic attitudes and contaminates female conventional domestic purity enhancing the concept of an unfixed female identity. The publications of a travelogue, a mostly non fictional genre, on an innovative and reactive medium, was a manifest a…
FIRST experiment: Fragmentation of Ions Relevant for Space and Therapy
2013
International audience; Nuclear fragmentation processes are relevant in different fields of basic research and applied physics and are of particular interest for tumor therapy and for space radiation protection applications. The FIRST (Fragmentation of Ions Relevant for Space and Therapy) experiment at SIS accelerator of GSI laboratory in Darmstadt, has been designed for the measurement of different ions fragmentation cross sections at different energies between 100 and 1000 MeV/nucleon. The experiment is performed by an international collaboration made of institutions from Germany, France, Italy and Spain. The experimental apparatus is partly based on an already existing setup made of the …
La (re)construcció visual i retòrica de Jaume I a la Festa de l?Estendard de Mallorca durant l?època foral
2017
Resum: L’article preten adverar de quina manera es configurava i s’identificava la figura del rei en Jaume a la Festa de l’Estendard, la commemoracio anual de la conquesta cristiana de la ciutat de Mallorca, mitjancant l’analisi dels elements visuals i retorics planificats per al desenvolupament d’aquella. Cal parar atencio, concretament, a dos d’aquests elements: el portaestandard que anava a cavall ben abillat amb armadura i altres objectes i l’eloquent predica –coneguda com el Sermo de la Conquesta– que pronunciava un clergue acreditat per a tal funcio. Paraules clau: Jaume I, imatge regia, festes de la Baixa Edat Mitjana, iconografia del poder, Regne de Mallorca Abstract: This paper att…
The Lady Half-Devoured by a Dragon and the Iconography of Saint Margaret of Antioch : Interpreting an Anonymous Invención in the Cancionero general (…
2018
Following in the footsteps of Ian Macpherson, I offer an interpretation of an anonymous invención found in the Cancionero general (11CG-517) and the British Library Cancionero (LB1-251). I maintain that the image displayed by the jouster was inspired by the iconography of the virgin-martyr Saint Margaret of Antioch, and I propose a theory about the identity of the lady addressed and, with less certainty, about the identity of the jouster and the occasion when the invención was displayed, using Pinar’s Juego trobado as a tool of research and invoking a passage on the sinfulness of the fashion among ladies and damsels for wearing hooped petticoats in a treatise by Hernando de Talavera.
Thermal activated carrier transfer between InAs quantum dots in very low density samples
2010
In this work we develop a detailed experimental study of the exciton recombination dynamics as a function of temperature on QD-ensembles and single QDs in two low density samples having 16.5 and 25 dots/¼m2. We corroborate at the single QD level the limitation of the exciton recombination time in the smallest QDs of the distribution by thermionic emission (electron emission in transient conditions). A portion of these emitted carriers is retrapped again in other (larger) QDs, but not very distant from those emitting the carriers, because the process is limited by the diffusion length at the considered temperature.