1,720,984 research outputs found
A Tuple Space Service for Large Scale Infrastructures
No full textCoordinating tasks is one of the main activities of every Grid middleware. There are several ways to achieve this goal, for example using publish/subscribe systems or workflow engines. In this article we will analyse another possible model: tuple spaces. The tuple space model has been successfully used for years for coordinating tasks in computational applications and has interesting characteristics like the support to open systems, allowing an application to scale without the need to reimplement it. This article will describe our experience in developing a tuple space system for the Globus Toolkit using Web Services
Grinda: A Tuple Space Service for the Globus Toolkit
No full textIn this article we will present a service for the Globus Toolkit that implements the tuple space model, allowing applications to use it to coordinate their activities
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
Testing Share Repurchases Hypotheses: a Conditional Study
No full textStefano Bonini, Vincenzo Capizzi, Maurizio
Lombardi, Roberto Mazzei have shown in their
paper that share buybacks have experienced a
tremendous growth, but people still don’t have a
clear understanding of this phenomenon, also
because of limited samples available on these
corporate decisions. The authors aims at testing
the main hypotheses on buybacks drivers and
effects by analysing the impact of share
repurchase announcements on the performance
of companies listed on the Italian Stock
Exchange, conditional and unconditional on the
1998 introduction of the Capital Market Reform
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
Sulle tracce di una metodologia sociale appresa collettivamente
No full textOrmai, sia per ragioni di competenze collettive, sia per la facilitazione comunicativa dovuta all'Web 2.0, molte procedure metodologiche sono apprese contemporaneamente in forma collettiva
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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