1,720,960 research outputs found
The Antarctic Seismographic Argentinean Italian Network - ASAIN Improving the instrumental coverage in Antarctica
No full textScientific investigations of the Scotia Sea region are crucial to
understand the history of the Antarctic continent tectonic evolution and the
influence of the aperture of the Drake passage in establishing the Circumpolar
Antarctic Current, as stressed by many authors (e.g. Lodolo, 2008). The Scotia
Sea occupies a roughly rectangular area of about 900.000 km . This area is
limited on three sides by the Scotia Arc, formed by islands and oceanic ridges,
which is a remnant of the mountain chain that joined the South American Andes
to the Antarctic Peninsula. The western border is represented by the about 1000
km wide Drake passage, that separates today the Tierra del Fuego in South
America from the Antarctic continent. A review of the tectonics and evolution
of the Scotia Sea can be found in Barker, 2001. The start of the geophysical
studies in this area dates back to several decades ago, but only after 1990
instrumental passive seismology started to be widely applied to investigate the
crustal properties and the properties of the seismic sources responsible for the strong
seismicity level observed along the Scotia plate boundaries. ASAIN started
operation in 1992 when a temporary seismograph was installed at the
Argentinean Base Esperanza. It grew quickly during the nineties and today five
stations are operated in Antarctica and two in Tierra del Fuego. All the Antarctic
stations transmit real-time data to the OGS and to the Instituto Antartico
Argentino. Esperanza (ESPZ), Jubany (JUBA), San Martin (SMAI) and
Orcadas(ORCD) stations also participate in the Virtual European Seismographic
Broadband Network (VEBSN) transmitting real time data to the Orfeus Data
Centre. On January 16 , 2009 BELA station was added to the network. It is
operated at the southernmost Argentinean Base Belgrano II (77° 52' S,
34° 37' W ) located on a rocky outcrop (Nunatak Bertrab) on the Filchner barrier. Its
inclusion in the VEBSN is also planned. ASAIN data real-time acquisition is
performed using SCREAM software, but also Earthworm and Antelope
software are being tested at the OGS Seismological Research Centre.UnpublishedErice (PA), Italy1.8. Osservazioni di geofisica ambientaleope
The Antarctic Seismographic Argentinean Italian Network - ASAIN Improving the instrumental coverage in Antarctica
No full textScientific investigations of the Scotia Sea region are crucial to
understand the history of the Antarctic continent tectonic evolution and the
influence of the aperture of the Drake passage in establishing the Circumpolar
Antarctic Current, as stressed by many authors (e.g. Lodolo, 2008). The Scotia
Sea occupies a roughly rectangular area of about 900.000 km . This area is
limited on three sides by the Scotia Arc, formed by islands and oceanic ridges,
which is a remnant of the mountain chain that joined the South American Andes
to the Antarctic Peninsula. The western border is represented by the about 1000
km wide Drake passage, that separates today the Tierra del Fuego in South
America from the Antarctic continent. A review of the tectonics and evolution
of the Scotia Sea can be found in Barker, 2001. The start of the geophysical
studies in this area dates back to several decades ago, but only after 1990
instrumental passive seismology started to be widely applied to investigate the
crustal properties and the properties of the seismic sources responsible for the strong
seismicity level observed along the Scotia plate boundaries. ASAIN started
operation in 1992 when a temporary seismograph was installed at the
Argentinean Base Esperanza. It grew quickly during the nineties and today five
stations are operated in Antarctica and two in Tierra del Fuego. All the Antarctic
stations transmit real-time data to the OGS and to the Instituto Antartico
Argentino. Esperanza (ESPZ), Jubany (JUBA), San Martin (SMAI) and
Orcadas(ORCD) stations also participate in the Virtual European Seismographic
Broadband Network (VEBSN) transmitting real time data to the Orfeus Data
Centre. On January 16 , 2009 BELA station was added to the network. It is
operated at the southernmost Argentinean Base Belgrano II (77° 52' S,
34° 37' W ) located on a rocky outcrop (Nunatak Bertrab) on the Filchner barrier. Its
inclusion in the VEBSN is also planned. ASAIN data real-time acquisition is
performed using SCREAM software, but also Earthworm and Antelope
software are being tested at the OGS Seismological Research Centre.UnpublishedErice (PA), Italy1.8. Osservazioni di geofisica ambientaleope
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
Testing the global capabilities of the Antelope software suite: fast location and Mb determination of teleseismic events using the ASAIN and GSN seismic networks
No full textThe Italian National Institute for Oceanography and Experimental Geophysics (Istituto Nazionale di Oceanografia
e di Geofisica Sperimentale, OGS) is running the Antarctic Seismographic Argentinean Italian Network (ASAIN),
made of 5 seismic stations located in the Scotia Sea region in Antarctica and in Argentina: data from these stations
are transferred in real time to the OGS headquarters in Trieste (Italy) via satellite links. OGS is also running, in
close cooperation with the Friuli-Venezia Giulia Civil Defense, the North East (NI) Italy seismic network, making
use of the Antelope commercial software suite from BRTT as the main acquisition system.
As a test to check the global capabilities of Antelope, we set up an instance of Antelope acquiring data in real time
from both the regional ASAIN seismic network in Antarctica and a subset of the Global Seismic Network (GSN)
funded by the Incorporated Research Institution for Seismology (IRIS). The facilities of the IRIS Data Management
System, and specifically the IRIS Data Management Center, were used for real time access to waveform required
in this study.
Preliminary results over 1 month period indicated that about 82% of the earthquakes with magnitude M>5.0 listed
in the PDE catalogue of the National Earthquake Information Center (NEIC) of the United States Geological
Survey (USGS) were also correctly detected by Antelope, with an average location error of 0.05 degrees and
average body wave magnitude Mb estimation error below 0.1.
The average time difference between event origin time and the actual time of event determination by Antelope was
of about 45’: the comparison with 20’, the IASPEI91 P-wave travel time for 180 degrees distance, and 25’, the
estimate of our test system data latency, indicate that Antelope is a serious candidate for regional and global early
warning systems.
Updated figures calculated over a longer period of time will be presented and discussed.PublishedVienna, Austria5.2. TTC - Banche dati di sismologia strumentaleope
Testing the global capabilities of the Antelope software suite: fast location and Mb determination of teleseismic events using the ASAIN and GSN seismic networks
No full textThe Italian National Institute for Oceanography and Experimental Geophysics (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, OGS) is running the Antarctic Seismographic Argentinean Italian Network (ASAIN), made of 5 seismic stations located in the Scotia Sea region in Antarctica and in Argentina: data from these stations are transferred in real time to the OGS headquarters in Trieste (Italy) via satellite links. OGS is also running, in close cooperation with the Friuli-Venezia Giulia Civil Defense, the North East (NI) Italy seismic network, making use of the Antelope commercial software suite from BRTT as the main acquisition system.
As a test to check the global capabilities of Antelope, we set up an instance of Antelope acquiring data in real time from both the regional ASAIN seismic network in Antarctica and a subset of the Global Seismic Network (GSN) funded by the Incorporated Research Institution for Seismology (IRIS). The facilities of the IRIS Data Management System, and specifically the IRIS Data Management Center, were used for real time access to waveform required in this study.
Preliminary results over a few months period indicated that over 80% of the earthquakes with magnitude M>5.0 listed in the PDE catalogue of the National Earthquake Information Center (NEIC) of the United States Geological Survey (USGS) were also correctly detected by Antelope, with an average location error of 0.05 degrees and average body wave magnitude Mb estimation error of about 0.1.
The average time difference between event origin time and the actual time of event determination by Antelope was of about 45’: the comparison with 20’, the IASPEI91 P-wave travel time for 180 degrees distance, and 25’, the estimate of our test system data latency, indicate that Antelope is a serious candidate for regional and global early warning systems.
Updated figures calculated over a longer period of time will be presented and discussed.PublishedAustria, Vienna5.2. TTC - Banche dati di sismologia strumentaleope
Testing the global capabilities of the Antelope software suite: fast location and Mb determination of teleseismic events using the ASAIN and GSN seismic networks
No full textThe Italian National Institute for Oceanography and Experimental Geophysics (Istituto Nazionale di Oceanografia
e di Geofisica Sperimentale, OGS) is running the Antarctic Seismographic Argentinean Italian Network (ASAIN),
made of 5 seismic stations located in the Scotia Sea region in Antarctica and in Argentina: data from these stations
are transferred in real time to the OGS headquarters in Trieste (Italy) via satellite links. OGS is also running, in
close cooperation with the Friuli-Venezia Giulia Civil Defense, the North East (NI) Italy seismic network, making
use of the Antelope commercial software suite from BRTT as the main acquisition system.
As a test to check the global capabilities of Antelope, we set up an instance of Antelope acquiring data in real time
from both the regional ASAIN seismic network in Antarctica and a subset of the Global Seismic Network (GSN)
funded by the Incorporated Research Institution for Seismology (IRIS). The facilities of the IRIS Data Management
System, and specifically the IRIS Data Management Center, were used for real time access to waveform required
in this study.
Preliminary results over 1 month period indicated that about 82% of the earthquakes with magnitude M>5.0 listed
in the PDE catalogue of the National Earthquake Information Center (NEIC) of the United States Geological
Survey (USGS) were also correctly detected by Antelope, with an average location error of 0.05 degrees and
average body wave magnitude Mb estimation error below 0.1.
The average time difference between event origin time and the actual time of event determination by Antelope was
of about 45’: the comparison with 20’, the IASPEI91 P-wave travel time for 180 degrees distance, and 25’, the
estimate of our test system data latency, indicate that Antelope is a serious candidate for regional and global early
warning systems.
Updated figures calculated over a longer period of time will be presented and discussed.PublishedVienna, Austria5.2. TTC - Banche dati di sismologia strumentaleope
Variations 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
Testing the global capabilities of the Antelope software suite: fast location and Mb determination of teleseismic events using the ASAIN and GSN seismic networks
No full textThe Italian National Institute for Oceanography and Experimental Geophysics (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, OGS) is running the Antarctic Seismographic Argentinean Italian Network (ASAIN), made of 5 seismic stations located in the Scotia Sea region in Antarctica and in Argentina: data from these stations are transferred in real time to the OGS headquarters in Trieste (Italy) via satellite links. OGS is also running, in close cooperation with the Friuli-Venezia Giulia Civil Defense, the North East (NI) Italy seismic network, making use of the Antelope commercial software suite from BRTT as the main acquisition system.
As a test to check the global capabilities of Antelope, we set up an instance of Antelope acquiring data in real time from both the regional ASAIN seismic network in Antarctica and a subset of the Global Seismic Network (GSN) funded by the Incorporated Research Institution for Seismology (IRIS). The facilities of the IRIS Data Management System, and specifically the IRIS Data Management Center, were used for real time access to waveform required in this study.
Preliminary results over a few months period indicated that over 80% of the earthquakes with magnitude M>5.0 listed in the PDE catalogue of the National Earthquake Information Center (NEIC) of the United States Geological Survey (USGS) were also correctly detected by Antelope, with an average location error of 0.05 degrees and average body wave magnitude Mb estimation error of about 0.1.
The average time difference between event origin time and the actual time of event determination by Antelope was of about 45’: the comparison with 20’, the IASPEI91 P-wave travel time for 180 degrees distance, and 25’, the estimate of our test system data latency, indicate that Antelope is a serious candidate for regional and global early warning systems.
Updated figures calculated over a longer period of time will be presented and discussed.PublishedAustria, Vienna5.2. TTC - Banche dati di sismologia strumentaleope
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