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Evoluzione morfologica e attività tettonica lungo la costa laziale meridionale
No full textLa morfologia del paesaggio costiero del Lazio meridionale mostra un evidente controllo strutturale, indicando una differente azione dei processi morfogenetici espressa dalla diversa fisiografia dei settori nord-occidentale e sud-orientale. Nel primo settore, i rilievi carbonatici dei M. Aurunci si estendono fino alla costa a falesie con spiagge a tasca; nel secondo, gli stessi rilievi si raccordano mediante conoidi coalescenti alla piana costiera minore di Formia
Automated extraction of geomorphometric properties of relic sandy bodies in the continetal platform from a digital map geo-referenced in a GIS: the case of Cilento.
No full textThe retreat of beaches in the world is increasingly evident., often due to a negative sediment balance. To prevent this, or at least to mitigate the effects of the retreat, were considered engineering structures and / or compensatory measures with results that were not always effective. Among the best measures, the artificial beach nourishment is well considered, because of its negligible environmental impact as well as for a discrete outcome with low costs. This intervention consists in sand dredging from the continental shelf, or from adjoining shorelines in progress, or even from the access channels to ports and then the discharge of it on the beach. The main difficulty is in identifying these "deposits of sediment" in the continental shelf which are considered the most relevant in terms of volume and likeness with the beach sediments adjacent to it. This contribution has attempted to extract automatically fOlIDS related to submerged ancient beach ridges, derived from the deposition of sand during the lowstands of the sea during the late Pleistocene, though a digital terrain model. The continental shelf, where the extraction was performed automatically. is placed at the south-eastern Tyrrhenian margin. It is in front to a high morphostructural, the Cilento promontory. bounded by the subsidence basins of the Gulf of Salerno - Piana del Sele River. NW. and Gulf of Policastro. SE.
The map of this continental shelf seabed was performed using high-resolution bathymetric surveys totaling 675 km run
with multibeam echo sounder at a rate not less than 50 kHz. insonificando the seabed in a bathymetric range between 0.5 to 150 m. Subsequently for the sedimentological characterization and. in particular, of the acoustic response on the type of bottom sediments marine mobile and its immediate substrate (SAVINI et al., 1995 cum bibl.), were evaluated for the same extension of the acoustic profiles with CHIRP sonar technology. high-resolution, The survey results were integrated with bathymetric charts of the Hydrographic Institute (1971). scale 1:100,000, appropriately georefereuced. with morphological and bathymetric data obtained from the geomorphological map in Ferraro et al. (1997) and with the morphological and sedimentary data collected from Pennetta (1996 a, b), De Pippo et al. (1996) and De Pippo and Pennetta (2000. 2004). All these data, taken together, allowed to obtain in a GIS environment the geomorphological map scale 1: 150.000 and to identify potentially areas for artificial beach nourishment. For the management and processing of data were used: the design software Autodesk Map 2008, which allowed the georeferencing of bathymetric charts of the Hydrographic Institute of the Navy and in the geomorphological Ferraro et al. (1997) in the reference system UT~II and interpolation of all the points relating to different depths, in order to obtain the preparation of the Charter Bathymetric. The processed data were exported to SHP in a condition suitable for use in other software environments, was then carried out a series of integrated applications of GIS ESRl ArcGIS Desktop 9.2, through which it was possible the drafting of other thematic maps. The applications used are ArcMap, ArcCatalog, and Arc'Toolbox, accompanied by instruments and controls GIS application ArcMap for all activities on mapping. editing and querying da.ta and apply ArcCatalog to organize and manage data. Through the application Arc Toolbox, organized collection of geoprocessing tools. operations were performed on GIS data available. The cartographic processing were represented in the reference system UTM. WGS 84 - ZONE 33N.
The basis on which different calculations were made was identified in a Digital Elevation Model (DEM) of the area made using the data in depth, these values were obtained by digitizing the depth contours from the bathymetric map in scale 1:10,000. The detail of the data permitted high-resolution raster model used. consisting of cell sizes of 1Oxl 0 meters. In order to encode the
entities geomorphological of interest, it was decided to analyze. from the point of view of the statistical distribution, the values relating t.o the key characteristics that can be derived starting from the The morphology that characterizes the platform, is rather articulated owing to the presence of faults in the substrate that generate displacements in the seabottom and therefore a structure of high and low areas, The platform is characterized by a wideness and an edge somewhat variable. The edge is located generally at a depth of 200 m except for the area overlooking the coastal stretch between Punta Licosa and Acciaroli, where it. reaches a depth of about 230 m, and for the southeastern area overlooking Punta Infreschi and the Gulf of Policastro, where it is much shallower with values lower than -100 m.
The average gradient varies from 0.30 in the north and gradually increases going southward where in the narrowest portion of continental shelf reaches 0.8°. Its maximum width of about 30 kill is measured at north-west, and then it gradually shrinks down proceeding towards south-east, for instance, it is 13 km to the beam of the Telegraph Tower and 7 km offshore of Cape Palinuro. In the Gulf of Policastro, finally, it is characterized by a low wideness, which reaches 7.5 k111,and high slope gradients.
On the platform were identified several limb of marine abrasion ten-aces with the edge located respectively at a depth of 30 m, 50 1119, 0 ui, 110111. 130 in, 140 m and 150 ill. Such terraces were modeled in coincidence of sea level changes occurred during the Pleistocene. Generally, they are evidenced from the hard substrate tha.t frequently rises from the bottom as well as from the irregular morphology surveyed at depths between 20 111 and 150 ill.
Depressed areas were also recognised, filled by successions of sediments in various sizes. These areas are related to extensional processes occurred 011 the southeastern sector of the Tyrrhenian Sea. probably in the Plio-Pleistocene, along NW -SE direction. Instead. a depressed area, that connects with the valley of the River Alento. is controlled by faults with anti-Apenninic trend (NE-SW). as evidenced in the intermediate portion of the platform. We also identified some channels that cut the bottom. forming a paleo-drainage network of subaerial origin, whose outlets are fans of sediments similar to the mouth complex. detected through the analysis of the seabottom morphology. Among other geomorphological features shown in the geomorphological map, two elongated sedimentary bodies with a trend NW -SE are focused at a depth of between -120 and -170 III parallel to the edge of the platform. They extend for about 23 km offshore of Punta Licosa. 3.5 kHz subbottom profiles recognise these bodies as overhead structures from the bottom, where the sea side is always presented with a slope greater than the coast side. They are characterized by a type of echo with the bottom indistinct without reflections in the substrate (Ferraro et aI., 1997), indicating the presence of sandy deposits generally more reflective than the pelitic deposits. The top of these structures is irregular and sometimes is topped by a thin layer of Holocene sediments.
DEM, ie elevation, slope, curvature and power of the relief
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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