1,720,971 research outputs found
Poster: A roaming-based denial of service attack on LTE networks
No full textDuring the last ten years, mobile communications greatly evolved. Along this process, the main goal was to satisfy users' needs such as coverage, communication speed, and availability. However, less attention has been posed to prevent attacks such as Denial of Service (DoS), which aim to render the mobile network unserviceable.
In this paper, we present a novel method to implement a distributed DoS attack on a target mobile operator's Control Network. We exploit the lack of coordination between local and remote components of the LTE network during the roaming authentication process to realize a pulse DoS using temporal lensing. Finally, we discuss the feasibility of our attack on future 5G networks
It’s Always April Fools’ Day! On the Difficulty of Social Network Misinformation Classification via Propagation Features
No full textGiven the huge impact that Online Social Networks (OSN)
had in the way people get informed and form their opinion,
they became an attractive playground for malicious entities
that want to spread misinformation, and leverage their effect.
In fact, misinformation easily spreads on OSN and is a huge
threat for modern society, possibly influencing also the outcome
of elections, or even putting people’s life at risk (e.g.,
spreading “anti-vaccines” misinformation). Therefore, it is
of paramount importance for our society to have some sort
of “validation” on information spreading through OSN. The
need for a wide-scale validation would greatly benefit from
automatic tools.
In this paper, we show that it is difficult to carry out an automatic
classification of misinformation considering only structural
properties of content propagation cascades. We focus on
structural properties, because they would be inherently dif-
ficult to be manipulated, with the the aim of circumventing
classification systems. To support our claim, we carry out an
extensive evaluation on Facebook posts belonging to conspiracy
theories (as representative of misinformation), and scientific
news (representative of fact-checked content). Our
findings show that conspiracy content actually reverberates
in a way which is hard to distinguish from the one scientific
content does: for the classification mechanisms we investigated,
classification F1-score never exceeds 0.65 during content
propagation stages, and is still less than 0.7 even after
propagation is complete
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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