168 research outputs found
Mutamenti tecnologici e strutturali nell’industria siderurgica mondiale. Un modello altamente innovativo
No full textEcoturismo: desarrollo sustentable de la provincia Paparo- Venezuela
No full textA través de este trabajo se ofrece una visión geoestratégica para la parroquia Paparo, provincia ubicada en el Estado de Miranda en Venezuela. El proyecto articuló actores comunitarios con miras a consolidar un nuevo tejido social-productivo, que promoviera el eco-turismo como el eje del desarrollo sustentable de la región. Consistió en un trabajo de campo que integró: a) un censo de la población; b) 15 entrevistas y c) 4 focus group. En cuanto a los resultados, se demostró la posibilidad de orquestar inquietudes sociales y consolidar voluntades para generar soluciones concertadas en la búsqueda de mejor calidad de vida para la sociedad, incluyendo necesariamente el ambiente y su protección para las futuras generaciones; ello, apalancado desde la educación para el desarrollo sostenible. Como producto tangible, se ofreció un Plan General, contentivo de dos grandes programas y seis proyectos que constituyen el eje primario para iniciar la consolidación de una plataforma para el pleno desarrollo sustentable de la región.AbstractThrough this work offers a geostrategic for parish Paparo, province located in the State of Miranda in Venezuela. Overview, articulating the community actors with a view to consolidating a new production fabric that promotes eco-tourism as the axis of the sustainable development of the region. It consisted in a field which included: a) a census of the population; b) 15 interviews and c) 4 focus group. As for the results, demonstrated the ability to orchestrate social concerns and consolidate wills to generate agreed solutions in search of a better quality of life for society, necessarily including the environment and its protection for future generations; This is leveraged from the education for sustainable development. As a tangible product, offered a General Plan, containing two large programs and six projects that are the main shaft to start the consolidation of a platform for the sustainable development of the region.Keywords: eco-tourism, sustainable development, education for sustainable development
PTV gap as a new measure of partisanship: a panel-data, multi-measure validation showing surprising partisanship stability
No full textComparative studies of partisanship lack a comparable transatlantic measure. In the U.S. the traditional ANES measure is used, while in European multi-party systems a party-closeness measure is mostly used. A recent contribution proposed PTV (propensity-to-vote) gap as a potential solution to this issue, showing that the gap in PTV scores between the best- and the second best-placed party has desirable properties in the American case. In this article we test the same measure on the multi-party case of Italy, using panel data from the CISE 2012–2013 Electoral Panel.The case is particularly relevant, given the turbulence experienced by the Italian party system at the time, with the emergence of important new parties. This makes this period a crucial test for performing a validation of party identification measures. Comparing the new measure with the traditional party-closeness measure, we show that: a) both measures are more stable than vote choice, in line with party identification theory, and contrary to previous research on other European multi-party systems; b) the two measures are virtually equivalent in terms of over-time stability. As a second comparative validation, we investigate the mutual effects relating partisanship and vote over time. Results show superiority for the PTV-gap measure, which has similar predictive power on vote choice, but in turn is predicted by it to a statistically inferior extent. As a result, we conclude that our validation of the PTV-gap measure– already successfully tested in the U.S. context – qualifies it as a productive tool for comparative research on partisanship
Recensione a Leone Leoni tra Lombardia e Spagna: atti del convegno internazionale, Menaggio, 25-26 settembre 1993
No full textBroadband Terahertz Spectroscopy of Imidazolium-Based Ionic Liquids
No full textIonic liquids are liquid salts at ambient temperature composed of organic cations and organic/inorganic anions. Outstanding physical and chemical properties of ionic liquids lead to increasing application in scientific and industrial field. Ionic liquids have been already investigated by different spectroscopic techniques, including terahertz (THz) time-domain spectroscopy. The usual THz frequency range extends up to 2-3 THz, a relatively narrow band, which can only show the intermolecular vibrational modes. Here, we report about broadband THz spectroscopy of ionic liquids up to 13 THz. Bandwidth of intermolecular absorption band presents an unexpected behavior and strong sharp intramolecular absorptions are shown. In addition, we found violation of the approximation of harmonic oscillator used to predict the peak shift of intermolecular absorption band
Complex Permittivity of Ionic Liquid Mixtures Investigated by Terahertz Time-Domain Spectroscopy
No full textIonic liquids are salts found in their liquid state at ambient temperature. The physicochemical properties of ionic liquids can be tailored by selecting constituent cation and anion from numerous available ions. The physicochemical properties can be further tuned by mixing different neat ionic liquids. Reported data of ionic liquid mixtures reveal that frequently investigated properties such as density, viscosity, and thermal stability follow corresponding mixing laws. Complex permittivity in the interval of terahertz frequencies is of great importance to understand the molecular interactions and the solvation dynamics which drive the macroscopic properties of ionic liquids; however, to the best of our knowledge, there are few reports about the mixing behavior of complex permittivity in ionic liquid mixtures. In this contribution, binary mixtures of 1-butyl-3-methylimidazoulium iodide ([C4C1im]I) and 1-butyl-3- methylimidazoulium bis(trifluoromethylsulfonyl)imide ([C4C1im][NTf2]) are investigated in the terahertz spectral range, and the resulting low-energy spectra are analyzed in order to clarify the mixing laws at play. The results show that the complex permittivity of mixtures of [C4C1im]I and ([C4C1im][NTf2] obeys a linear mixing law
Optical second-harmonic generation selection rules and resonances in buried oxide interfaces: the case of LaAlO3/SrTiO3
No full textDespite an intense research effort, the physical mechanism underlying the formation of a quasi-two-dimensional electron gas at the interface between the band insulators LaAlO3 and SrTiO3 is still not fully understood. Interface- sensitive optical second-harmonic spectroscopy can shed light on this mechanism, by accessing specific information on the orbital and structural reconstruction taking place at the interface that is not accessible by other techniques, and in particular by transport measurements. Here we present a detailed theoretical analysis of the spectral transitions that are most relevant in the second-order nonlinear optical response of oxide interfaces with a square symmetry, in general. In particular, we discuss the case of LaAlO3∕SrTiO3 interfaces, using symmetry arguments to derive specific selection rules, which have strong consequences on the second-harmonic spectra recorded with different input/output polarization combinations of light. These selection rules may in particular explain recent experimental findings
Europe matters ... upon closer investigation: a novel approach for analysing individual-level determinants of vote choice across first- and second-order elections, applied to 2019 Italy
No full textAre European Parliament (EP) elections still second-order? In this article, we test the classical model at the individual level in contrast to an alternative ‘Europe matters’ model, by investigating the relative importance of domestic vs. European Union (EU)-related issues among voter-level determinants of aggregate second-order effects, that is, individual party change. We do so by relying on an original, CAWI pre-electoral survey featuring a distinctively large (30) number of both domestic and EU-related, positional and valence issues, with issue attitudes measured according to the innovative ICCP scheme (De Sio and Lachat 2020) which includes issue positions, issue priorities and respondents' assessment of party credibility on both positional and valence goals. Leveraging the concept of ‘normal vote’, we estimate multivariate models of electoral defections from normal voting separately for general and European elections, based on issue party credibility. This allows us to assess: (a) the distinctiveness of the two electoral arenas in terms of issue content; and (b) the relative impact of EU-related and domestic issues on defections of Italian voters. Our findings show that although second-order effects are still relevant in accounting for results in EP elections, vote choice in the latter is also partly due to specific effects of certain policy issues, including some related to the European dimension. This indicates that EP elections have their own political content, for which Europe matters even after controlling for the importance that EU-related issues have acquired in national elections
- …
