1,721,009 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
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
Issues in Personalized Access to Multiversion XML Documents
No full textIn several application fields including legal and medical domains, XML documents are “versioned” along different dimensions of interest, whose nature depends on the application needs such as time, space and security. Specifically, temporal and semantic versioning is particularly demanding in a broad range of application domains where temporal versioning can be used to maintain histories of the underlying resources along various time dimensions, and semantic versioning can then be used to model limited applicability of resources to individual cases or contexts. The selection and reconstruction of the version(s) of interest for a user means the retrieval of those fragments of documents that match both the implicit and explicit user needs, which can be formalized as what we call personalization queries. In this chapter, we focus on the design and implementation issues of a personalization query processor. We consider different design options and, among them, we introduce an in-depth studyof a native solution by showing, also through experimental evaluation, how some of the best performing technological solutions available today for XML data management can be successfully extended and optimally combined in order to support personalization queries
Semantic Routing for Effective Search in Heterogeneous and Distributed Digital Libraries
No full textNext generation Digital Libraries (DLs) will offer an entire ensemble of systems and services designed to help users to easily find and access the information they are looking for. However, much work is still required in order to achieve this vision. In this paper, we concentrate our attention on devising techniques allowing an effective routing of queries, which we think can be of the utmost importance in providing effective and efficient querying in heterogeneous and distributed DLs, identifying the best ways to navigate the available nodes and, thus, the documents (or their parts) which are most suitable to best answer the user needs. We describe a routing mechanism, which we call routing by mapping, in which the query is sent to the DL peers whose subnetworks best approximate the concepts required. To this end a distributed index mechanism is adopted, which we call Semantic Routing Index (SRI). We also present some exploratory experiments showing the effectiveness of the proposed approach
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
Temporal modelling and management of normative documents in XML format
No full textIn this paper, we present the results of a research project concerning the temporal management of normative texts in XML format. In particular, four temporal dimensions (publication, validity, efficacy and transaction times) are used to correctly represent the evolution of norms in time and their resulting versioning. Hence, we introduce a multiversion data model based on XML schema and define basic mechanisms for the maintenance and retrieval of multiversion norm texts. Finally, we describe a prototype management system which has been implemented and evaluated
A Framework for ITS Data Management in a Smart City Scenario
No full textIn this paper we introduce a technological framework to efficiently support data management in a modern Intelligent Transportation System (ITS). The proposed technology enables the efficient storage of a variety of recent/historical/static data and guarantees its effective querying by supporting continuous as well as one-time queries for the delivering of real-time traffic services. The framework also offers a scalable solution for coping with the acquisition of huge volumes of data by employing data reduction techniques in Vehicle-to-Infrastructure transmissions. Experimental evaluation on the Linear Road ITS benchmark and along various simulated scenarios demonstrates that the proposed framework efficiently supports smart city data needs
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