1,721,009 research outputs found
Lightweight Steganography on Smartphones
No full textSteganography is an historical technique to send secret messages embedded into carrier messages. The introduction of computers provided very sophisticated techniques to create carrier messages, to embed the secret, and to detect steganographic messages.
The smartphone devices are both popular and ubiquitous, and they can be used as an ``all-in-one'' device for steganography.The users can shoot photos, and use them as carrier message. By means of the computational capacity of the smartphones, the user can also embed and retrieve small messages into the photos stored into the device.
Moreover, the user can securely communicate its secrets by means of sending and receiving MMS messages.
The Multimedia Messaging Service, MMS, is a common technique to exchange images in the actual scenario of cellular telephony.
In this paper we show the results of preliminary studies to test the feasibility of such an approach
Relazioni costitutive in campo plastico e nello scorrimento viscoso.Comitato Nazionale Energia Nucleare RT/ING(76)26
No full text
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
Il cavallo nella ritualità funeraria dell’età del Ferro di Padova: un confronto con Este e uno sguardo all’ambito bolognese
No full textThe aim of this paper is to verify, through a distributional and chronological analysis of the evidence, the apparent discrepancy, in the urban necropolis of pre-Roman Padua, between the absence of equine trappings and harnesses in the grave goods and the presence of equine burials, also considering the importance of horses in funerary contexts, as testified by epigraphic-linguistic data and numerous iconographic representations, both on grave goods (Situla Art) and on sepulchral markers (funerary Stelae). The diachronic and topographical framework of evidence, whether real or iconographic, outlined in detail for Padua, has been compared with that obtainable for the Iron Age in the other large Veneto plain centre of Este and in the Villanovan and Etruscan settlement of Bologna. The evaluation of similarities and differences made it possible to better clarify the importance attributed to the horse in the funerary sphere and the different ways of expressing it in time and space, as well as contribute to a better understanding of funerary behaviour between the three proto-urban and then
urban centres
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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