1,721,021 research outputs found
Investigating the mediterranean by seafloor observations: The eastern branch of the EMSO Ligurian Sea node
No full textLocritani, M. ... et. al.-- OCEANS 2015, 18-21 May 2015, Genova.-- © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.The overall objective of this proposal is to build an advanced and original prototype specifically devoted to seafloor and water-column monitoring as starting Italian contribution to the further development of the EMSO Ligurian Sea node. In detail the aim of the observatory is to ensure real-time continuous acquisition of geophysical, oceanographic and biological data by a cable system from a marine depth of about 500 m to the shore stationPeer Reviewe
CLEAN SEA project: the test in Lake Vättern (Sweden)
No full textThe CLEAN SEA (Continuous Long-term Environmental and Asset iNtegrity monitoring at SEA) project has been
realized by eni e&p and its subsidiary Eni Norge in cooperation with Tecnomare in 2012. The aim of the project
is to use a commercially available AUV properly upgraded, installed and operated by SAAB AUV, for the execu-
tion of environmental monitoring in offshore zone. We participated to the project performing the environmental
characterization of site (Lake Vättern, Sweden) selected for the field test of Clean Sea project, and to providing
support to processing the collected data by the payload installed. In detail, in the first phase of the project, we char-
acterized the site of interest analyzing the clime, the morphology, and the principal chemical and physical water
and environmental parameters on the basis of historical data (meteorology, hydrology, hydrodynamic, wind, ice
cover and natural resources of the lake). In the second phase of the project, we processed the oceanographic and
environmental data acquired in Lake Vättern during the AUV tests. The tests have been performed in two different
areas in the East and West side of the lake. In detail Temperature, Salinity, Methane, Turbidity, Chlorophyll, Col-
ored Dissolved Organic Matter, Polycyclic Aromatic Hydrocarbons, Oxygen, pH, Oxidation Reduction Potential,
Refined Oil and Crude Oil have been acquired in 21 different tests with 4 different mission types, and successively
processed and evaluated. The analysis highlights the spatial and temporal variability for each parameter, and allows
the comparison with the available historical data.PublishedVienna6A. Monitoraggio ambientale, sicurezza e territorioope
CLEAN SEA project: the test in Lake Vättern (Sweden)
No full textThe CLEAN SEA (Continuous Long-term Environmental and Asset iNtegrity monitoring at SEA) project has been
realized by eni e&p and its subsidiary Eni Norge in cooperation with Tecnomare in 2012. The aim of the project
is to use a commercially available AUV properly upgraded, installed and operated by SAAB AUV, for the execu-
tion of environmental monitoring in offshore zone. We participated to the project performing the environmental
characterization of site (Lake Vättern, Sweden) selected for the field test of Clean Sea project, and to providing
support to processing the collected data by the payload installed. In detail, in the first phase of the project, we char-
acterized the site of interest analyzing the clime, the morphology, and the principal chemical and physical water
and environmental parameters on the basis of historical data (meteorology, hydrology, hydrodynamic, wind, ice
cover and natural resources of the lake). In the second phase of the project, we processed the oceanographic and
environmental data acquired in Lake Vättern during the AUV tests. The tests have been performed in two different
areas in the East and West side of the lake. In detail Temperature, Salinity, Methane, Turbidity, Chlorophyll, Col-
ored Dissolved Organic Matter, Polycyclic Aromatic Hydrocarbons, Oxygen, pH, Oxidation Reduction Potential,
Refined Oil and Crude Oil have been acquired in 21 different tests with 4 different mission types, and successively
processed and evaluated. The analysis highlights the spatial and temporal variability for each parameter, and allows
the comparison with the available historical data.PublishedVienna6A. Monitoraggio ambientale, sicurezza e territorioope
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
Environmental magneto-gradiometric marine survey in a highly anthropic noisy area
No full textWe describe a magneto-gradiometric survey performed in the «Mar Piccolo» of Taranto, Italy in May 2005 for environmental purposes. This region, which is a noisy harbour environment, provides a challenging test for magnetic methods. To reduce spurious noise signals, with both temporal and spatial origins, we used two Geometrics G880 model caesium magnetometers towed in a transverse gradient configuration. We show how, in shallow waters, this gradiometric configuration allows us to distinguish anomalies due to small metallic bodies near the seabed from the induced noise due to the anthropic contribution and geomagnetic field variations. A direct visual inspection confirmed that the peculiarities highlighted in the gradient anomaly map were due to abandoned metallic objects found on the seabed
Coastal dynamic features along the Northern Ligurian Shelf (Portofino Cape) in summer 2004: Role of the meteorological and the topographic forcings
No full textVariations on the Author
Full text link“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
Full text linkWe 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
A thermogenic hydrocarbon seep in shallow Adriatic Sea (Italy): gas origin, sediment contamination and benthic foraminifera.
No full textGaseous and liquid hydrocarbons are seeping from sandy sea bottom ~10 m deep, about 2.4 km NNE of Civitanova Marche harbour, in central Adriatic Sea (Italy). We investigated the origin of the gas, the presence in shallow sediments of a wide range of aromatic and aliphatic hydrocarbons and trace metals, and the stable carbon and oxygen isotope composition of benthic foraminifera. Molecular and isotopic composition of gas bubbles showed that the CH4-rich gas is thermogenic from low maturity rocks (13CCH4~ -55 ‰ VPDB; 2HCH4~ -280 ‰ VSMOW; C1/(C2+C3) < 100), likely belonging to the Emma-Scaglia (carbonate source rocks) Petroleum System (Upper Trias to Paleocene), and stored in a biodegraded hydrocarbon pool. Fluid seepage might be due to a local fracture zone corresponding to the intersection of NNW-SSE thrust faults with a NE-SW regional transversal deformation belt. Compared to other shallow marine seeps in Europe, the amount of methane released into the atmosphere is negligible (102-103 kg of CH4 per year); but the seep releases also ethane and propane (103-104 L per year), which are photochemical pollutants and are not emitted by microbial gas seeps. Relative to a reference site one nautical mile far from the seep, the seabed sediments show higher concentrations of various classes of chemicals, such as benzene, toluene and ethylbenzene, semivolatile and non volatile aliphatic hydrocarbons (C10-C40), and phenols (2-methylphenol and 2,4-dichlorophenol). These compounds likely derive from the oil seepage. Trace metals (arsenic, barium, cadmium, chromium, copper, iron, manganese, nickel, lead, vanadium, zinc, mercury) did not exhibit significant differences among the samples, and concentrations were typical of uncontaminated and shallow coastal areas. Finally, we provided the first data on foraminifera associated to thermogenic hydrocarbons. No endemic foraminifera species or authigenic carbonates occur in the sediments. Carbon isotopic composition of Quinqueloculina padana where oil slick prevails is less variable than in the gas bubbling site. However, thermogenic methane and oil do not apparently decrease the 13C value of foraminifera carbonate shell
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