Search results for "CA [SR]"
showing 10 items of 2784 documents
Microwave harmonic emission in MgB2 superconductor: Comparison with YBA2CU3O7
2006
We report results of microwave second-harmonic generation in ceramic samples of MgB2, prepared by different methods. The SH signal has been investigated as a function of the temperature and the static magnetic field. The results are discussed in the framework of models reported in the literature. We show that the peculiarities of the SH signal are related to the specific properties of the sample. A comparison with the results obtained in ceramic and crystalline YBa2Cu3O7 shows that the second-harmonic emission in MgB2 is weaker than that observed in ceramic YBa2CuO7. (c) 2006 Wiley Periodicals, Inc.
ECOLOGICAL FEATURES OF MACROMYCETES IN EUCALYPTUS REFORESTATIONS IN SICILY (SOUTHERN ITALY)
2009
The objective of this work was to compare and estimate the ecological features of 192 macromycetes, including nine hypogeous and three semi-hypogeous fungi, collected in Sicilian areas reforested with Eucalyptus. The number of mycorrhizal fungi turned out to be only 22 % of the taxa recorded so far from other areas, and this underlines the difficulties of eucalyptus trees in adapting to the pedological and climatic conditions of Sicily.
Controlled solution-based fabrication of perovskite thin films directly on conductive substrate
2021
Abstract Organometallic perovskites are one of the most investigated materials for high-efficiency thin-film devices to convert solar energy and supply energy. In particular, methylammonium lead iodide has been used to realize thin-film perovskite solar cells, achieving an efficiency higher than 20%. Different fabrication procedures based on the spin-coating technique have been proposed, which do not ensure homogenous morphologies. In this work, we present a scalable process to fabricate methylammonium lead iodide thin films directly on conductive substrates, consisting of electrodeposition and two subsequent chemical conversions. A thorough investigation of the morphological, structural an…
Media and fake news: An analysis of citizens’ attitudes toward misinformation in European countries
2021
The rapid changes determined by the rise of Internet and the recent development of social media in daily life have led to profound consequences on the quantity and quality of data made available and on the mechanisms of their dissemination. The rapid spread of on-line disinformation is one of the most discussed topic, and has been identified as one of the top-trends in modern societies by the World Economic Forum, also because of the link between these processes and political communication. Thanks to the availability of micro-data from the Flash Eurobarometer survey on “Fake news and disinformation online”, the present work aims at analyzing the attitude of European citizens toward fake new…
PESI - a taxonomic backbone for Europe
2015
Reliable taxonomy underpins communication in all of biology, not least nature conservation and sustainable use of ecosystem resources. The flexibility of taxonomic interpretations, however, presents a serious challenge for end-users of taxonomic concepts. Users need standardised and continuously harmonised taxonomic reference systems, as well as highquality and complete taxonomic data sets, but these are generally lacking for nonspecialists. The solution is in dynamic, expertly curated web-based taxonomic tools. The Pan-European Species-directories Infrastructure (PESI) worked to solve this key issue by providing a taxonomic e-infrastructure for Europe. It strengthened the relevant social (…
Recensione a: La porta del sapere. Cultura alla corte di Federico II di Svevia, Roma, Carocci, 2019
2020
Recensione a Fulvio Delle Donne, La porta del sapere. Cultura alla corte di Federico II di Svevia, Roma, Carocci, 2019, pp. 270. Il volume esamina le varie forme di cultura che si svilupparono alla corte di Federico II di Svevia (produzione letteraria in latino e in volgare, produzione artistica e giuridica, etc.). Review to Fulvio Delle Donne, The door to knowledge. Culture at the court of Frederick II of Swabia, Rome, Carocci, 2019, pp. 270. The volume examines the various forms of culture that developed at the court of Frederick II of Swabia (literary production in Latin and in the vernacular, artistic and legal production, etc.).
Multiphoton process investigation in silica by UV femtosecond laser
2022
We investigated the interaction processes between high intensity femtosecond ultraviolet laser pulses and amorphous silica, leading to permanent refractive-index changes that are at the basis of advanced manufacturing for photonics devices. The experiment, carried out as a function of the laser power, improves our understanding on the strong-field ionization process by the monitoring of the 1.9 eV and 2.65 eV emissions, related to nonbridging oxygen hole centers and self-trapped exciton, respectively, induced in the exposed glass region. Our results clearly proved that the UV laser light band-to-band absorption is allowed in the multiphoton ionization limit, whose consecutive relaxation lea…
Formazione di complessi di inclusione della beta-ciclodestrina. Una dimostrazione colorimetrica
2018
Caratterizzazione ESR di composti fenolici: nuovi materiali per la dosimetria in campo misto neutroni-gamma
2014
What is your couple type? Gender ideology, housework sharing and babies
2014
BACKGROUND It is increasingly acknowledged that not only gender equality, but also gender ideology plays a role in explaining fertility in advanced societies. In a micro perspective, the potential mismatch between gender equality (i.e. the actual sharing taking place in a couple) and gender ideology (i.e. gender equality in attitudes, as proxy for gender equity), may drive childbearing decisions. OBJECTIVE This paper assesses the impact of consistency between gender equality in attitudes and equality in the division of household labour on the likelihood of having another child, for different parities. METHODS Relying on two-wave panel data of the Bulgarian, French, Czech, Hungarian and Lith…