1,721,176 research outputs found
Standardizzazione per il contesto e la lingua italiana. Caratteristiche tecniche e metodologiche
No full textIl contributo presenta le procedure statistiche ed i dati psicometrici e normativi della standardizzazione italiana della SIS
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
Independent behaviour of rat liver LDL receptor and HMGCoA reductase under estrogen treatment.
No full textThe main molecules of hepatic cholesterol homeostasis are HMGCoA reductase, the key enzyme of the
biosynthetic pathway, and LDL receptor, responsible for the uptake of plasma lipoproteins. Estrogens are
reported to cause hypolipidemia in mammalians inducing hepatic LDL receptor. The effect of such hormones
on HMGCoA reductase is very ambiguous. The mechanism and the time-dependence of the effects of these
hormones on HMGCoA reductase and LDL receptor in rat liver have been investigated at mRNA and
protein levels, at different times after estrogen administration. Estrogens cause an early increase of LDLr,
at both mRNA and protein level, and an increase of HMGCoA reductase, just at protein level, detectable
only after 5 days. The independent behavior of LDLr and HMGCoA reductase under estrogen treatment
suggests a not coordinate regulation by these hormones
MITC9 shell elements based on refined theories for the analysis of isotropic cylindrical structures.
Full text linkIn this work a nine-nodes shell finite element, formulated in the framework of Carrera’s Unified Formulation (CUF), is presented. The exact geometry of cylindrical shells is considered. The Mixed Interpolation of Tensorial Components (MITC) technique is applied to the element in order to overcome shear and membrane locking phenomenon. High-order equivalent single layer theories contained in the CUF are used to perform the analysis of shell structures. Benchmark solutions from the open literature are taken to validate the obtained results. The mixed-interpolated shell finite element shows good properties of convergence and robustness by increasing the number of used elements and the order of expansion of displacements in the thickness direction
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
MALATTIE DEL CUORE. Trattato di Medicina Cardiovascolare
No full textPrincipi generali di biologia cellulare e molecolare dell'apparato cardiovascolare dell'Uomo nell'ambito della patologia cardiovascol
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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