1,721,068 research outputs found
The Mega Event. New research perspective in economics, exhibitions, urban transformation
No full textMega event: a matter of definition?
The widespread availability of new communication instruments has made it possible to enjoy events in faraway places. Furthermore, the strongly symbolic value of many of them has encouraged a purely virtual participation.
Economic literature in the English-speaking world defines a mega event as a gathering of various kinds (religious, sport-related, cultural), which becomes an event because it acquires certain time and size characteristics. It takes place regularly at more or less long intervals, in a well-defined timeframe and attracts or should attract a vast public.
The objectives and successes and failures of a great event must then be connected to the logic of each type of evolutionary events. The event itself is not, in fact, an innovation: from time immemorial, are celebrated with emphasis on civic and religious events in order to attract and, if possible, to direct public opinion. Innovations, if anything, were introduced in the organization and funding of events and, especially, in how to reduce their impact on economic, social and environmental. Today the big event is the tool to make the dream of directors who hope to become global cities and, therefore, to connect directly to the local development of international economic processes. Major events are made primarily of hopes and promises, you can not, then you know the results achieved in both the medium and long term. When, however, the local dimension comes into contact with the global one, there is the risk that emerge all sticky and backwardness accumulated by government and private companies operating in a limited size in which no priority is always the principle of efficiency. The issue of big events, it appears, therefore, currently part of the collaboration, confrontation and conflict between the local and the global: a relationship that is not always manageable and would require greater attention at national and European levels and internationally
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
Effects of ultrasound irradiation on the properties of biological homogenates
No full textThe effects induced in biological samples by free radicals generated during short periods (less than or equal to 5 min) of ultrasound irradiation have been investigated by following the decay kinetics of the electron paramagnetic resonance signal of the piperidine nitroxide 4-hydroxy-2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPOL) in rat heart homogenates. Different kinetic models have been evaluated in order to identify the reactions involved in nitroxide decay. The results obtained indicate that sonication, however short its duration, significantly alters components of the homogenate playing a major role in nitroxide decay, thus substantially modifying the kinetics of the process. (C) 1997 Elsevier Science Ltd
Effects of Uvalino, a new autochthonous wine, on the inhibition of the production of hydroxyl radicals
No full textIn view of the high concentration of resveratrol found in a new autochthonous wine (Uvalino) and the notable antioxidant activity of this substance, we decided to assess whether this wine could inhibit the production of free radicals. Nowadays, free radicals are considered to be the most noxious factors for tissues, triggering the development of many diseases. The assessments were carried out using a direct and more precise technique, electronic paramagnetic resonance (EPR), which is able to detect the ability of an antioxidant agent to inhibit the formation of hydroxyl radicals ( .OH), which are among the most noxious reactive oxygen species (ROS). The results show that Uvalino wine is able to eliminate ROS production almost completely. Consequently, it has beneficial effects on health in all the diseases in which ROS plays an important pathogenetic role
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