1,720,997 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
FUNZIONALITA' RESPIRATORIA, DATI CLINICI E PUNTEGGIO HRCT IN PAZIENTI CON FIBROSI CISTICA
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
Utilità del FEF 25-75 nel valutare la risposta al broncodilatatore nel bambino asmatico
No full textModifications of cyclic alternating pattern in sleep apnea syndrome.
No full textWithin non-rapid eye movement sleep, two complementary modalities of arousal organization may be identified: (1) the cyclic alternating pattern (CAP), correlated with successive upward (phase A) and downward (phase B) fluctuations of arousal and arousal-related vegetative functions, and (2) non-CAP, corresponding to a relative stability of arousal and vegetative activities. In a 62-year-old overweight and heavily snoring man, complaining of excessive daytime sleepiness, three consecutive polysomnograms displayed a highly frequent occurrence of nocturnal apneas (apnea index: 15), mostly obstructive and mixed, limited to non-rapid eye movement sleep stages 1 and 2. The apneic episodes, that never occurred during non-CAP, exclusively appeared during the inhibitory phase B of CAP, whereas the following breathing resumption was mainly induced by an activating phase A pattern. The crucial effect of arousal instability on respiratory control is emphasized
Key Features of the Novel Geothermal Heat Exchanger Prototype Installed at the Brenner Base Tunnel
No full textThe design, installation, and testing of an innovative geothermal heat exchanger, tailored for tunnels
excavated by Tunnel Boring Machines, will be presented. The prototype was developed by the joint
efforts of BBT SE, involved in the construction of a new railway base tunnel system connecting Italy and
Austria, and the University of Bologna, engaged in applied research over various aspects of the BBT
system. The geothermal heat exchanger consists in a modular horizontal closed-loop system located in the
exploratory tunnel of the BBT system, specifically in the space dedicated to collect the drained water at the
lining invert. Due to the type of the heat exchange process, working with the drainage water, and for its
compact design and simple installation procedure, the prototype was called “Smart Flowing”. Modules were
built outside and later moved inside the tunnel, and eventually placed and assembled concurrently to the
advancement of the Tunnel Boring Machine. Specific tests were performed to prove the reliability and the
efficiency of the system, by simulating the work of a heat pump conditioning system in both heating and
cooling modes. Finally, a preliminary assessment of the economic and environmental potential of this
innovative prototype was carried out. First results showed the performance of the system for both heat
dissipation and extraction. The drainage water flow guarantees a continuous recovery to the natural state,
thus improving efficiency compared to classic geothermal heat exchangers. Economic savings and
reduction of pollutants and greenhouse gases, as compared to burning fossil fuels, can reach up to 70%
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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