1,721,009 research outputs found
First results of geotechnical and sedimentological determinations on Joides Basin Cores in relation to the Pleistocene Grounding Line
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
Caratteristiche sedimentologiche della piattaforma continentale del Golfo di Taranto compresa tra Capo Trionto e Punta Rondinella
No full text
Il Delta del Fiume Centa (Liguria Occidentale): un esempio di modificazione recente del clima e del paesaggio
No full textApplication of participatory method for beach management
No full textResults from the application of a participatory approach in the final phase of a project (named SABBIA), aiming at improving beach management in the Liguria Region, are reported. A new methodology developed for the involvement of stakeholders and/or experts, called NetSyMod (Network Analysis-Creative System Modelling-Decision Support), was applied in order to test results obtained in the first phases of the SABBIA project and to further investigate local authorities and main stakeholders' point of view. Particularly, a specific workshop was organized, involving participants selected within regional and local authorities, technical institutions, universities and main tourism category associations. Main outputs of the workshop were: i) the definition of a specific and concerted conceptual model of the environmental and socio-economic framework in the considered coastal area, with a specific focus on beaches and ii) the evaluation of 12 management options (6 ongoing and 6 proposed interventions), contributing to the definition of new planning strategies for local sustainable beach management
Sedimentazione fine nella Wood Bay (Mare di Ross occidentale - Antartide).
No full textDuring 2001-2002 P.N.R.A. (Programma Nazionale di Ricerca in Antartide) oceanographic cruise, a first survey in a new basin discovered in the inner part of Wood Bay was performed. Sub Bottom Profiler (3.5 kHz) results have evidenced wide areas covered by transparent fine sediments. Preliminary study on two sediment cores has permitted to get some paleoenvironmental considerations about late Pleistocene-Holocene evolution of the basi
Recent evolution of a delta plain and a coastal zone: the Volturno delta system (southern Italy)
Full text linkLast century seabed morphodynamics of the Magra River estuary (Western Mediterranean Sea)
No full textThe estimation of morphological and volumetric changes of the delta system at the mouth of the Magra River is
presented in this paper using bathymetric and sedimentological data. The data series were collected during several
hydro-oceanographic surveys carried out from 1882 to 2014, processed following the hydrographic international
standards and stored in the Italian Navy Hydrographic Institute database. In particular, bathymetric data characterized
by the same standard and accuracy were collected using different devices such as sounding lines, single-beam
and multi-beam acoustic system. This research compares Digital Terrain Models (DTMs), derived from highly
accurate bathymetric data and covering different time scales (secular, half-century and decade) in order to assess
and quantify the seabed morphodynamics in relation with the river sedimentary budget. The methodology and data
exploitation consist mainly in the production of DTMs to study the elevation change, two-dimensional and three
dimensional maps, cross-sections of the seabed, difference surfaces and computation of net volumes as well as
an historical sedimentological map. These products are also an useful contribution to the aim of EU RISC-KIT
Project. The results of the analysis highlight changes in the geometry of the Magra River mouth, of the coastal
profile and bottom features primarily due to variations of the sedimentary budget and secondarily to wave dynamics.
This behaviour is characterized by evident river mouth and coastal retreat, beach erosion and sediment bars
decay and net accretion under periods of high river sediment discharge and elongate bar formation during relatively
fair conditions. In the last century the main change is constituted by the disappearance of the typical constructive
seabed delta morphology and the transformation into the current small estuary, with microtidal condition. This
small estuary has an upper sector where river processes, sediments and bedforms dominate, a lower sector near the
mouth, where wave and tidal processes and marine sediments dominate, and a middle sector, where tidal currents
dominate and both river and marine sediments are present
- …
