1,721,042 research outputs found
Implementation of an advanced tomographic algorithm for GPR realistic sounding
No full textPresented here is an advanced implementation of a microwave tomographic approach, which is capable of accounting for the near-field distribution generated by antennas commonly used in typical monostatic and bistatic Ground Penetrating Radar (GPR) systems. The algorithm is applied to process numerical data obtained by means of a reliable and efficient full-wave simulation tool. This latter enables us to achieve an accurate determination of the electromagnetic field incident in the probed medium as well as of the backscattered field generated by metallic or dielectric hidden targets. Various non-ideal effects in the investigated scenarios are considered, in order to verify soundness and effectiveness of the reconstruction procedure
Ground penetrating radar as remote sensing technique to investigate the root system architecture
No full textTecniche innovative di indagine per la caratterizzazione geotecnica dei materiali e degli ammassi rocciosi
No full text
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
Applications of GPR to archaeology and geology: The example of the regio III in Pompeii (Naples, Italy)
No full textGPR investigations has been collected in Pompeii, in an area of the regio III not yet fully excavated. In this area, as in many other parts of this roman city, large portions of archaeological features are still buried under thick volcanic deposits. The radar survey has been conducted on the top of a long scarp parallel to Nola Street. This site was chosen because some remains are well visible on the front of the scarp, so they can be use to calibrate the radar sections. The results allowed us to reconstruct the subsurface structure of the area, and to locate the main roman ruins buried in the volcanic deposits. Moreover, the analyses of the radar sections highlighted the geometry of the volcanic deposits overlain the roman ruins, and made possible the correlation between the shallow geological stratigraphy and the reflectors sequence shown in the radargrams
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