1,720,989 research outputs found
Fast Authentication in Heterogeneous Wireless Networks
Full text linkThe growing diffusion of wireless devices is
leading to an increasing demand for mobility and security.
At the same time, most applications can only tolerate short
breaks in the data flow, so that it is a challenge to find out
mobility and authentication methods able to cope with these
constraints. This paper aims to propose an authentication
scheme which significantly shortens the authentication
latency and that can be deployed in a variety of wireless
environments ranging from common Wireless LANs
(WLANs) to satellite-based access networks
MOON: a New Overlay Network Architecture for Mobility and QoS Support
Full text linkThe continuously increasing diffusion of mobile devices
such as laptops, PDAs and smartphones, all equipped with
enhanced functionalities, has led to numerous studies about
mobility and to the definition of new network architectures
capable to support it.
Problems related to mobility have been addressed mostly
operating on the network or transport layers of the Internet
protocol stack. As a result, most of these solutions generally
require modifying the TCP and/or the IP protocol. Although this
approach is well suited to handle mobility, it lacks in
compatibility with the Internet Protocol Suite.
This consideration led us to study a fully TCP compatible and
flexible approach we dubbed MOON, for MObile Overlay
Network. This network architecture is currently under design at
LIPAR, the Internet, Protocols and Network Architecture Lab of
Politecnico di Torino
Preliminary observations of the behaviour of cultivars Vermentino and Chardonnay affected by "Bois noir" in Sardinia
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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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