1,720,955 research outputs found
The new version of the parametric catalog of Italian earthquakes (CPTI04)
No full textIn the framework of the initiative promoted by the Istituto Nazionale di Geofisica e Vulcanologia (INGV) aimed to the preparation of a new hazard map of the Italian territory, a working group operated, starting from the beginning of June 2003, to revise the Catalogo Parametrico dei terremoti Italiani (CPTI99). The work was approached by dividing the entire catalog in three segments:
1. Before year 1000
2. Between years 1000 and 1980
3. After year 1980
Regarding the first two segments, the preliminary activities mainly concerned the insertion of new macroseismic studies, made available after the publication of the first CPTI version (end of 1999) and of the SISFRANCE (France) and ECOS (Switzerland) for relative boundary areas, as well as a revision of the choices among concurrent studies.
For the segment after 1980, we made a complete relocation and revaluation of instrumental magnitudes, on the basis of the Catalogo Strumentale dei terremoti Italiani (CSTI Working group, 2001) for the period 1980-1996 and of a revised version of the INGV database, integrated with the main regional networks, for the period 1997-2002. The instrumental catalog was integrated with macroseismic studies and available Ms and Mw magnitude estimates taken from the literature and on-line catalogs.
The group also made a revaluation of the empirical relations among different instrumental magnitudes and between macroseismic data and magnitudes using improved criteria. The instrumental and macroseismic magnitudes have been combined by weighted averages to give a uniform values both for Ms and Mw ready to be used to compute occurrence rates and ground motion at site.
A preliminary version of this catalog, actually used for the computation of the new seismic map of Italy presented in another lecture of this session, was made available on the web. The catalog includes about 2000 earthquakes with Mw>4.15 from Ancient Times to 2002, while the macroseismic database includes in all more then 70,000 intensity observations
The influence of b-value estimate in seismic hazard assessment
No full textIn any probabilistic seismic hazard assessment an important role is played by the seismicity rates. This is confirmed by the wide and
controversial discussions about the procedures for their determination: Gutenberg and Richter distribution vs independent rates in
every magnitude class ; size of binned magnitude class; the fitting algorithm to use (least squares or maximum likelihood); and so on.
In 2004 a new probabilistic seismic hazard map of Italy, named MPS04 (MPS04 Working Group, 2004), was released adopting a logic tree
approach for exploring the alternative epistemic choices (Fig. 1). For seismogenic zonation (ZS9, MPS04 Working Group, 2004) (Fig. 2)
and catalogue (CPTI04; CPTI04 Working Group, 2004) no alternative models were explored.UnpublishedGeneva, Switzerlandope
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
The influence of b-value estimate in seismic hazard assessment
No full textIn any probabilistic seismic hazard assessment an important role is played by the seismicity rates. This is confirmed by the wide and
controversial discussions about the procedures for their determination: Gutenberg and Richter distribution vs independent rates in
every magnitude class ; size of binned magnitude class; the fitting algorithm to use (least squares or maximum likelihood); and so on.
In 2004 a new probabilistic seismic hazard map of Italy, named MPS04 (MPS04 Working Group, 2004), was released adopting a logic tree
approach for exploring the alternative epistemic choices (Fig. 1). For seismogenic zonation (ZS9, MPS04 Working Group, 2004) (Fig. 2)
and catalogue (CPTI04; CPTI04 Working Group, 2004) no alternative models were explored.UnpublishedGeneva, Switzerlandope
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
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