1,721,148 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
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
"Eccoti pochi appunti presi cammin facendo": la "lingua parlata" in tre 'lettere' e nelle note lessicografiche di Giuseppe Giusti
No full textAppropriate 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
Energy conversion systems: the case study of compressed air, an introduction to a new simulation toolbox
Full text linkThe paper illustrates the simulation activities going on within
the LABAC (laboratory of energy performance of compressed
air systems) at the University of Pavia. The scope is to build
up a simulator, based on a comprehensive energy model, en-
abling the end-user both to improve the system efficiency, al-
lowing modifications on the system configuration and/or the
use of alternative devices, and to properly size a pneumatic
network. The final use is both for educational and test pur-
pose. The simulator represents the laboratory plant, where the
generation unit, the receiver, the cleaning up equipment and
the distribution of compressed air are set in place. For the
modeling, the Xcos application, graphical Scilab interface,
has been used; to emphasize the potential derived by the use
of this simulator, the role of increasing storage unit/receiver
is investigated with respect to the system energy consump-
tion. Several testings have been performed. The simulation
reported in this paper has been carried out for 4000 s and two
different configurations are investigated: the living one with
0.5 m3 vs. the alternative 6.5 m3 storage tank. A detailed ap-
proach to the identification of all equipment is proposed and
energy and power considerations are reported
FORMATION OF BINARY-SYSTEMS AND PROTOPLANETARY DISKS - A UNIFIED APPROACH
No full textA thermodynamic approach to the last stages of star formation when a collapsing fragment evolves adiabatically into a single protostar is presented. Angular momentum transfer is shown to be a very efficient mechanism tending to form double stars with small mass secondaries, and total decoupling is shown to form twin binaries. It is noted that disks of larger mass, which would be required to produce protoplanetary systems as a consequence of dynamical instabilities, do not form under any circumstances
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