1,721,048 research outputs found
Exposició: 'La Guerra Freda a través de la música' al CRAI Biblioteca d'Economia i Empresa (2017)
No full textMaterial elaborat pel CRAI Biblioteca d'Economia i EmpresaExposició Virtual Juny 2017Enguany (2017) fa 70 anys del començament de la Guerra Freda, el conflicte social, polític i econòmic que es va produir entre dos eixos: el capitalista, liderat pels Estats Units, i el comunista, liderat per la Unió Soviètica. No va ser una guerra pròpiament dita, sinó un enfrontament entre dos blocs, el dels països que havien adoptat el model econòmic liberal i capitalista (Estats Units, països europeus, alguns països d'Amèrica Llatina) i el dels països que havien adoptat el model econòmic comunista (Unió Soviètica, alguns països de l'est d'Europa, Vietnam, Corea, Xina).
L’enfrontament va comportar un seguit de conflictes que van aixecar moltes veus en contra, entre elles les de cantants i grups musicals que van parlar amb les seves lletres ja fos per fer crítica o per dibuixar-nos un futur incert.
Des del CRAI Biblioteca d'Economia i Empresa hem fet una exposició virtual, La Guerra Freda a través de la música, amb la documentació que tenim sobre cadascun dels temes, una petita recopilació de cançons, les seves lletres -originals i traduïdes- i l'enllaç al vídeo
Test campaign and application of a small-scale ducted wind turbine with analysis of yaw angle influence
No full textThis paper aims to investigate the innovative design of a ducted horizontal-axis wind turbine and to compare its energy production with a traditional free turbine for energy harvesting, both at laboratory and on relevant environment scales. The ducted wind turbine was designed considering a convergent-divergent duct, with the turbine in the throat section, where the velocity is maximum. The first part of the present paper describes the test rig and the experimental activities at the University of Genoa (Italy) wind tunnel, aimed comparing between the ducted and the traditional wind turbine at laboratory scale, considering the same rotor and comparing the power production. The second part describes the pre-commercial prototype of the ducted turbine (1 m rotor diameter), installed in the harbor of Genoa and tested under real conditions. The two experimental campaigns have shown a power increase up to 2.5 from the same rotor, compared to the free turbine configuration. In both experimental campaigns, the influence of the angle between the wind direction and the duct was investigated to determine the maximum power output of the turbine, corresponding to a yaw angle of 20°. As a final step, a possible application of this kind of ducted wind turbines is presented, investigating the case study of highway tunnel illumination: in this case, the presence of a yaw angle allows for reducing the number of turbines for the same energy production
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
- …
