1,720,974 research outputs found
The Senonian flint-clays of the Internal Carbonate Platform (Southern Apennines, Italy).
No full textI depositi argillosi dal Cretacico superiore al Miocene inferiore nella piattaforma carbonatica Campano-Lucana: variazioni mineralogiche ed evoluzione paleoambientale.
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Wavelet data processing of micro-Raman spectra of biological samples
No full textA wavelet multi-component decomposition algorithm is proposed for
processing data from micro-Raman spectroscopy (μ-RS) of biological
tissue. The μ-RS has been recently recognized as a promising tool for the
biopsy test and in vivo diagnosis of degenerative human tissue pathologies,
due to the high chemical and structural information contents of this
spectroscopic technique. However, measurements of biological tissues are
usually hampered by typically low-level signals and by the presence of noise
and background components caused by light diffusion or fluorescence
processes. In order to overcome these problems, a numerical method based
on discrete wavelet transform is used for the analysis of data from μ-RS
measurements performed in vitro on animal (pig and chicken) tissue
samples and, in a preliminary form, on human skin and oral tissue biopsy
from normal subjects. Visible light μ-RS was performed using a He–Ne
laser and a monochromator with a liquid nitrogen cooled charge coupled
device equipped with a grating of 1800 grooves mm−1. The validity of the
proposed data procedure has been tested on the well-characterized Raman
spectra of reference acetylsalicylic acid samples
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
Prospettive geotermiche dell'Irpinia centrale (Appennino meridionale): studio geologico, strutturale e geochimico
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