1,720,977 research outputs found
Improved efficiency of plasmapheresis collection in Italy through licensed variations of current practice: a proposal
Full text linkBackground. The overall production efficiency of plasmapheresis in Italy is significantly less than that indicated by international data, but can be significantly improved by slightly increasing the amount of plasma collected for each procedure, while fully respecting the current regulations. Materials and methods. In order to compare the average plasma volumes collected by means of apheresis in Italy and other European countries, we considered data supplied by Kedrion (the only company active in Italy in the field of plasma-derived products) relating to Italy and three centres managed by Kedrion in Germany. Results. In 2014, Kedrion received about 174,000 kg of plasma collected by means of plasmapheresis in Italy, for an average unit weight including anticoagulant of 577 g, as against the approximately 97,000 kg (average unit weight including anticoagulant 783 g) produced by the three Kedrion centres in Germany. The net weight of the plasma (without anticoagulant) contained in a plasmapheresis unit of 577 g is about 520 g, whereas a maximum collected volume of 600 mL (permitted by current Italian legislation without the need for volume reintegration) would provide a plasma unit volume of 660 mL (600 mL of plasma plus about 60 mL of anticoagulant): i.e. 14% more than that currently provided by Italian Transfusion Centres. This would increase the total amount of plasma sent to Kedrion to 199,500 kg, without creating any major organisational difficulties (only a few minutes' increase in the length of the procedure) or additional costs, or increasing donor risk. Discussion. It is possible to hypothesise the following donation volumes. Women weighing 50-60 kg: 550 mL (net of anticoagulant), final unit volume about 610 mL; men, and women weighing >60 kg: 600 mL net, final unit volume about 660 mL. Using recently published data relating to the plasmapheresis centre in Verona (Italy), the cost of a litre of plasma is € 283.87 if the average unit volume (including anticoagulant) is 600 mL, and € 263.46 if it is 650 mL (i.e. a net plasma yield of 585 mL): a 7.2% cost reduction simply by increasing final unit volume by 50 mL, something that is already feasible and perfectly safe, and does not require donor volume reintegration under current Italian law
Benchmark - L'architettura del progetto e i risultati del primo esercizio nazionale
No full textL'architettura del progetto e i risultati del primo esercizio nazional
L'idoneità alla donazione di sangue ed emocomponenti
No full textL'idoneità alla donazione di sangue ed emocomponent
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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