1,721,889 research outputs found
Expert knowledge-based methodology for land degradation risk evaluation
No full textIn the framework of European IMAGE project, a methodology for land degradation risk assessment has been defined in order to evaluate both the current risks and, on the basis of hypothetical scenarios, the expected risks for the year 2020. The methodology has been applied to the Ofanto river basin which has an extension of about 2700 square km, evaluating four main risk typologies: land desertification, soil sealing, water degradation and soil erosion. The pilot area is a representative site for the Mediterranean conditions. In particular, during the last fifty years, the area has undergone relevant land use changes with land abandonment in the marginal areas and agricultural intensifications of plain zones. Taking into account the pressure of agricultural activities and the conflict for water exploitation between the different irrigated districts, the assessment of the main risks affecting the area is particularly valuable; it can represent a starting point for supporting policy makers throughout the decision process both about the allocation of water resources and about conservative land resources management. © 2008, Page Press Publications. All rights reserved
Magnetic properties of Fe-pnictides superconductors as a function of pressure and doping
No full textWe present a first principles study of the electronic and magnetic properties of Fe-based pnicitdes superconductors as a function of pressure and doping. We show that the magnetic phase and a local magnetic moment persists at doping level quite larger than what found in experiments and the pressure phase diagram consists of a paramagnetic, antiferromagnetic and non-magnetic phases.
Although this result calls for the inclusion of long-wavelength or local fluctuations of iron magnetic moment and non-hydrostatic pressure effects, in order to improve the theoretical description of real experimental conditions, recent photoemission experiments[1] reconcile these DFT results, showing a local magnetic moment on Fe site different from zero in the paramagnetic, antiferromagnetic and the superconducting phase
La transizione energetica come paradigma di sviluppo sostenibile. Un caso di studio nella collina interna della Campania settentrionale
No full textAssessment of the potential of biomass: A new method for the planning of sustainable energy [La valutazione del potenziale da biomassa: Una nuova metodologia per una pianificazione energetica sostenibile]
No full textThe sources of renewable energy can represent an engine of local development, It is therefore necessary to prepare a planning which is sustainable, attentive to the environmental frameworks, landscapes and social standards and, at the same time, capable of evaluating the potential energy of the territory. The present work using a methodology that takes into account territorial vocations aims at evaluating the potential from biomass with the aid of the latest generation of software (agrires) in order to offer an exemplification of sustainable energy planning, in a marginal territory, such as the inland hills of northern Campania in the province of Caserta, on the border with Lazio, economically disadvantaged and fragile from a social point of view. © FrancoAngeli
Neutron Cross-sections for Next Generation Reactors: New Data From n_TOF
No full textIn 2002, an innovative neutron time-of-flight facility started operation at CERN: n_TOF. The main characteristics that make the new facility unique are the high instantaneous neutron flux, high resolution and wide energy range. Combined with state-of-the-art detectors and data acquisition system, these features have allowed to collect high accuracy neutron cross-section data on a variety of isotopes, many of which radioactive, of interest for Nuclear Astrophysics and for applications to advanced reactor technologies. A review of the most important results on capture and fission reactions obtained so far at n_TOF is presented, together with plans for new measurements related to nuclear industry
Spatio-Temporal Dynamics of Urban and Natural Areas in the Northern Littoral Zone of Rome: Land-Cover Change Analysis During the Last Thirty Years. Preliminary Results
No full textThe present study is focused on the littoral zone between Rome and Civitavecchia, where the spatio-temporal dynamics of the land cover has been analysed during the last thirty years, by means of Remote Sensing and GIS procedures. In a few decades, the coastal municipalities within the study area have considerably increased their inhabitants. Population and urban expansion have grown in parallel, at the expense of agricultural and natural areas, especially in the narrow coastal strip between the sea and the hills. Landsat satellite data from 1990 to 2019 have been processed and classified in order to describe and map the Land-Cover change (LCc). Maps have been suitable integrated with population data and other geospatial layers (transportation network). The results obtained allowed to understand the natural and rural land transformations, especially those related to the urban growth and expansion that are related to the proximity of Rome City
Effects of nonhydrostatic pressure on the structural and magnetic properties of BaFe(2)As(2)
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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