1,721,029 research outputs found
Preliminary observations on the upper cretaceous rudist assemblages from the Alburni Mts. (southern Italy)
No full textPaleoecological and biostratigraphical observations on the upper Cretaceous Rudist facies of Alburni Mounts (Campania, southern Italy).
No full textSantonian Rudist assemblages in high energy depositional setting of southeastern Alburni Mounts (Campania, Italy).
No full textProduct maintenance management by lifecycle assessment
No full textEnvironmental responsibility of organizations and
green attributes of products are becoming
competitive tools to attract customers. In such a
context, even though the role of development of
innovative products and processes has been widely
discussed, maintenance contribution to prevent and
reduce environmental impacts seems to be poorly
investigated. Nevertheless, the characteristics of the
product’s life cycle, strictly related to reliability and
maintenance concerns, certainly influence
sustainability of both the product and its production
processes, especially in the case of “intensive-use”
products. For this type of products, changes in
maintenance and refurbishment operations can lead
to different life cycle scenarios, which have
beneficial effects on materials and energy
consumption. This paper proposes a framework for
the improvement of environmental sustainability by
means of product maintenance management, i.e.
throughout the management of the product’s life
cycles, leading to a product service system approach.
The proposed methodology was tested on an
industrial case study, i.e. the life cycle modeling of a
machine for dialysis therapy. Results show that the
adoption of specific changes in the maintenance plan
succeeded in reducing negative effects on the
environment, optimizing at the same time company’s
costs related to customers’ assistance services,
without decreasing the level of safety and reliability
of the medical equipment. In fact, thanks to the new
product maintenance management the environmental
impact could be improved up to 23%
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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