1,720,975 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
Optimized 3D-2D CNN for automatic mineral classification in hyperspectral images
No full textMineral classification using hyperspectral imaging represents an essential field of research improving the understanding of geological compositions. This study presents an advancedmethodology that uses an optimized 3D-2D CNNmodel for automatic mineral identification and classification. Our approach includes such crucial steps as using the Diagnostic Absorption Band (DAB) selection technique to selectively extract bands that contain the absorption features of minerals for classification in the Cuprite zone. Focusing on the Cuprite dataset, our study successfully identified the following minerals: alunite, calcite, chalcedony, halloysite, kaolinite,montmorillonite,muscovite, and nontronite. The Cuprite dataset results with an overall accuracy rate of 95.73%underscore the effectiveness of our approach and a significant improvement over the benchmarks established by related studies. Specifically, ASMLP achieved a 94.67%accuracy rate, followed by 3D CNN at 93.86%, SAI-MLP at 91.03%, RNN at 89.09%, SPE-MLP at 85.53%, and SAMat 83.31 %. Beyond the precise identification of specific minerals, ourmethodology proves its versatility for broader applications in hyperspectral image analysis. The optimized 3D-2D CNNmodel excels in terms of mineral identification and sets a new standard for robust feature extraction and classification
Sécurité Analogique de l’Information : (Sécurité du Futur)
No full textLa sécurisation de l’information est aujourd’hui, essentiellement fondée sur les algorithmes de calcul dont la confidentialité dépend du nombre de bits nécessaires à la définition d’une clé cryptographique. Si ce type de système a fait ses preuve, la puissance croissante des moyens de calcul menace la confidentialité de ces méthodes cryptographiques classiques. Les ordinateurs puissants sont certes capables de chiffrer et de déchiffrer rapidement l’information, mais leur vitesse de calcul autorise parallèlement la cryptanalyse, qui a pour objectif de « casser » un code en découvrant la clé, par exemple en testant toutes les clés possibles. La seule évocation du principe de l’ordinateur quantique, aux capacités de calcul potentiellement colossales, a déclenché un choc, même chez les plus farouche convaincus de la cryptographie algorithmique. Pour pallier cette inquiétude, deux méthodes ont émergé ces dix dernières années, bien différentes dans leur principe des méthodes classiques : 1. La cryptographie quantique : La technique se base sur la polarisation des photons qui rend compte de leur moment angulaire interne. Le résultat d’une mesure de polarisation peut prendre deux valeurs possibles, assimilables au système binaire 0 et 1. 2. La cryptographie continue par un signal chaotique : consiste à ajouter au message à transmettre un signal chaotique. L’émetteur envoie à un récepteur ce signal chaotique où le message est noyé. Connaissant les caractéristiques du signal chaotique initial, le récepteur sait extraire le message du signal reçu. Dans cette communication on essaye de faire en outre, d’une part l’introduction à la sécurité quantique et du chaos chiffrant et d’autre part, étudier la possibilité de mettre le chaos à la disposition de la cryptographie algorithmique (cryptographie à clé secrète) pour cela, il faut chercher des modèles mathématiques adéquats pour sécuriser l’information, et que ses derniers satisfassent les conditions du chaos.Mots Clés : Cryptographie; Cryptanalyse; Chaos; Quantique
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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