1,721,017 research outputs found
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
Il Progetto Sinago. Intervento psicoeducativo individuale.
No full textIl Progetto “Sinago” (dal greco “condurre insieme / “accompagnare”) nasce nel 2010 con l’idea che la presa in carico di adolescenti debba essere in grado di adattarsi alle diverse esigenze emerse negli ultimi anni
Mid-IR DIAL for high-resolution mapping of explosive precursors
No full textA DIAL instrument on a moving platform is seen as a valuable remote sensing component in a sensor network for area monitoring, targeting sites involved in unauthorised explosive manufacturing. Such instrument will perform the area mapping of the vapour concentration of key substances, known to be used as precursors in explosive fabrication, such as acetone and nitromethane. The IR spectra of acetone and nitromethane vapours have been defined from available spectroscopy databases and from laboratory measurements as showing optimal spectral band for the DIAL operation in the spectral range of 3.0 μm - 3.5 μm. The DIAL operation has been numerically simulated, with inputs based on the HITRAN database, the U.S. Standard Atmosphere and aerosol simulation software package OPAC. A combination of OPO and OPA has been chosen as a transmitter, where the idler wavelength is used for probing, with wavelength tuning in sequence. A scanner mounted on top of the coaxially aligned laser and receiver, is capable of covering almost 360 degrees horizontally and ±30 degrees vertically. The detection is performed by a photovoltaic photodiode with 4-stage cooling, with a signal digitalisation having 14 bit amplitude resolution and 125 Ms/s sampling rate. Here we present the development and the first test of the DIAL instrument. © 2013 SPIE
La distribuzione dei sistemi di trasduzione condiziona la reattività acrosomiale degli spermatozoi di verro
No full textVariations 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
Rapporto finale sulla campagna di misure sulla fontana dei Tritoni di Valletta del 14-16 febbraio 2017
Full text linkLa Fontana dei Tritoni (Triton Fountain) nei pressi di Valletta a Malta è un’opera d’arte di Vincent Apap, inaugurata nel 1959. Su una grande vasca di travertino, si ergono tre Tritoni in bronzo che sostengono una piccola vasca, anch’essa bronzea. Nell’ambito della collaborazione concordata tra ENEA e la ditta De Feo Restauri, durante il restauro del materiale lapideo sono state condotte delle indagini scientifiche dal Centro di ricerca ENEA di Frascati. In particolare dal 14 al 16 febbraio 2017 è stata svolta una campagna di misure in situ durante la quale sono state svolte analisi con strumentazioni portatili non invasive e sono stati prelevati campioni per analisi di laboratorio da svolgere successivamente. Le
indagini sono state finalizzate alla caratterizzazione della superficie e delle forme di degrado presenti e alla valutazione dei processi di pulitura presi in considerazione.The Triton Fountain in Valletta (Malta) is a work of art by Vincent Apap, inaugurated in 1959. On a large travertine marble tub, three bronze Tritons stand, supporting a small tub, in bronze too. In the frame of the collaboration between ENEA and De Feo Restauri, the ENEA Research Centre of Frascati has carried out scientific surveys for the restoration of the stone material, constituting the lower part of the fountain. In particular, in the period from 14 to 16 of February 2017, an in-situ measurement campaign has been conducted with portable non-invasive techniques. At that time, also, several different samples have been collected for laboratory analyses. Studies have been devoted to both the
characterization of substrate and degradation forms, and the evaluation of the cleaning processes considered by Restorers
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
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