1,721,010 research outputs found
Experience of the ENEA in the field of R&D on solution volume and mass determination
No full textSolution volume and mass measurements are an essential component of any system to control and account for nuclear materials that are processed or stored in a liquid medium, both from the Operators and the Safeguards Authorities point of view. ENEA engaged a comprehensive R&D programme and, in cooperation with National and
International Organizations, undertook theoretical and experimental studies on tank volume calibration and measurements in order to fill the recognized technological gap.
This paper presents the experiencesof the ENEA and the University of Rome in the field of R&D on solution volume and mass determination
PEPSICODE - A computer code for the dynamic simulation of SNM hold-up in mixer settlers
No full textHold-up of
processing facilities is an insidious problem from both safety and safeguards point of view.
Large inventory differences (IDs) are often proven to be caused by wrong estimates of hold-up, consequently, for a more efficient SNM accounting system, a new awareness about the problem of hold-up estimation has been created.
In order to simulate the dynamic behaviour of mixer-settlers in an extraction solvent process, ENEA, in cooperation with the University of Rome, developed a Purex Extraction Process SImulation Code (PEPSICODE).
PEPSICODE, due to a peculiar hydrodynamic modelling, describes time evolution of U, Pu and fission products concentrations both for transient and steady-state conditions.
Simulation of an extraction campaign öf EUREX plant will be reported
Ipotesi di fattibilità di un tomografo per il controllo di qualità di matrici cementizie inglobanti residui radioattivi a bassa e media attività
No full textProgetto di un sistema di tomografia Single Pencil Beam per rifiuti radioattivi condizionat
Simulazione della variazione temporale dell'hold-up di uranio, plutonio e prodotti di fissione in contatori tipo mixer-settlers
No full textDetermination of plutonium, uranium and fission products hold up in mixer settlers contactor
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
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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