1,721,013 research outputs found
La réforme de l'enseignement dans la Communauté Economique Européenne, M. Reguzzoni. 1966.
No full textGeronimi Charles. La réforme de l'enseignement dans la Communauté Economique Européenne, M. Reguzzoni. 1966.. In: Revue française de pédagogie, volume 1, 1967. pp. 62-65
La réforme de l'enseignement dans la Communauté Economique Européenne, M. Reguzzoni. 1966.
No full textGeronimi Charles. La réforme de l'enseignement dans la Communauté Economique Européenne, M. Reguzzoni. 1966.. In: Revue française de pédagogie, volume 1, 1967. pp. 62-65
Local Moho estimate in the Italian area based on a global Moho from GOCE data
No full textThe estimate of the Moho surface in the Italian area has been performed to refine a global Moho model. In fact, at regional scale, the gravity based Moho estimate can benefit from the availability of such a global model.
This information can be usefully exploited to remove low frequencies from local gravity data allowing a better detection and inversion of high frequency details.
The used global Moho has been computed by assuming a simple two-layer model, with known density contrast and a mean Moho depth. Under these hypotheses, a linear relationship can be derived between the spherical harmonic coefficients of the anomalous potential and those representing the Moho depth. Based on this linear relationship and properly reduced GOCE data, the harmonic coefficients of the global Moho have been first computed and then used as a basis for a local refinement, thus outlining a two-step procedure. Particularly, gravity data in the Italian area have been reduced for the gravity signal implied by this global Moho and used in a second step estimation procedure based on a collocation approach. Also, in reducing the local gravity data, the density variations with respect to the simple two-layer model have been considered and accounted for. The obtained local Moho corrections have been finally mapped onto the original GOCE global Moho to improve its high frequency pattern. The effectiveness of this stepwise estimation procedure has been tested by comparison with other Moho solutions known in literature over the same area
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
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
Gravity data for a 3-D density model of the Po plain and the surrounding region
No full textIn order to properly localise earthquakes and define, especially in tectonically active areas, the seismic risk, there is the necessity to have reliable earth models. Unfortunately, conventional geophysical tomographic methods face the problem of irregular data coverage over the surface of the studied volume, which can produce irregular image resolution. This problem is difficult to address for each isolated geophysical technique, and it demands an effort for the integration of different geophysical methods into a single inversion scheme. In this work, we show how gravity information is a valuable tool in discriminating among possible models. An appropriate density starting model: a 10 layers 1D model which represents the mean geological structure below the Po plain and the surrounding region ([7.24E-12.80E], [43.78N-46.18N]), is tested upon two different gravity data sets, three different model parametrizations and two different seismic information.. The contribution given by ground based gravity data has been compared to the one, obtained by the combination of the GOCE satellite observation with the Italian terrestrial gravity data. This combination has been performed by means of a frequency analysis, using the very low frequencies from the GOCE data, the low frequency (between 181 and 240 degrees, in term of spherical harmonics) from the integration of the ground data with the GOCE data by least-square collocation, the high frequencies are obtained by residual terrain correction modelling. The 2012 Emilia seismic sequence, together with recent instrumentation deployed within the Po plain, allows to improve the existing crustal models by using a 2-20 s regional surface wave tomography. Isotropic reference S-wave velocity models up to 25 km of depth are calculated from the local dispersion curves for both the Love and Rayleigh fundamental mode using a linearized inversion scheme. Furtherly, seismological models and gravimetric data are exploited in the Sequential Integrated Inversion procedure, where we explored how (a) a coarse grid with 10km x 10km; (b) a grid with 3km x 3km; (c) an heterogeneous grid with 1km x 1km of areal resolution in the region of maximum seismic resolution and with 10km x 10km elsewhere; explain both gravity and seismic information. The reliability of the reconstructed models is quantified through a restoring test and the estimation of seismic and gravity data variance
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
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