1,721,077 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
Second order magneto optic effect in Brillouin scattering from spin waves in magnetic multilayers
No full textThe Brillouin light scattering cross section from a thick magnetic multilayer has been calculated
using a theoretical model based on a macroscopic partial waves approach for the calculation of the
normal modes. Special attention has been paid to analyzing the effect of inclusion of the second
order magneto-optic constant in addition to the first order one ~corresponding to Voigt and Faraday
effects, respectively!. This model has been exploited to analyze the experimental Brillouin spectra
measured from a several nm thick Ni/Cu bilayer. Both surface and bulk standing spin waves have
been experimentally detected for different incident angles and applied magnetic fields ~including
field reversal!. The measured spectra can be satisfactorily reproduced by our model, allowing the
determination of magnetic and magneto-optic parameters of the samples
Diritto amministrativo Volume I- Parte sostanziale
No full textIl diritto amministrativo è lo spazio giuridico ove le potestà autoritative si confrontano con le libertà dei privati. Attualmente la produzione normativa registra una massiccia e crescente presenza di disposizioni amministrative e tali sono anche le soluzioni organizzative destinate a fronteggiare le sfide del reale. L’”amministrazione” finisce così per conformare quasi ogni ambito dell’economia e della società, recependone le novità e orientandone l’evoluzione. Sempre più spesso poi i formanti nazionali (norme, giurisprudenza, prassi, ecc.), a loro volta espressione di un ordinamento articolato in più livelli, si intrecciano con quelli internazionali e dell’Unione europea. Queste caratteristiche del fenomeno giuridico-amministrativo ne rendono difficili la ricostruzione dogmatica e lo studio sistematico. Onde agevolare tale compito, i due volumi che compongono l’opera offrono una rappresentazione completa e aggiornata del diritto amministrativo, sostanziale e processuale. I maggiori pregi del manuale sono costituiti da un’esposizione chiara degli istituti, mai disgiunta da un elevato standard di scientificità, e soprattutto – a differenza di altri testi in commercio - da una trattazione della “parte generale” della materia organicamente integrata con quella delle numerose discipline “speciali”
Effect of the interfacial dzyaloshinskii–moriya interaction on the spin waves eigenmodes of isolated stripes and dots magnetized in-plane: A micromagnetic study
No full textThe influence of the Dzyaloshinskii-Moriya interaction (DMI) on the eigenmodes of magnetic nanostructures is attracting interest for both fundamental reasons and prospects in applications. In this study, the characteristics of spin waves eigenmodes in either long stripes or elliptical dots magnetized in-plane, with lateral dimensions of the order of 100 nm, are analyzed by micromagnetic simulations in presence of a sizeable DMI. Using the GPU-accelerated software MuMax3, we show that the eigenmodes spectrum is appreciably modified by the DMI-induced non-reciprocity in spin-waves propagation: the frequencies of the eigenmodes are red-shifted and their spatial profiles appreciable altered due to the lack of stationary character in the direction orthogonal to the magnetization direction. As a consequence, one finds a modification of the expected cross-section of the different modes in either ferromagnetic resonance or Brillouin light scattering experiments, enabling one to detect modes that would remain invisible without DMI. In this respect, the modifications of the spectrum can be directly connected to a quantitative estimation of the DMI constant. Moreover, it is seen that for sufficiently large values of the DMI constant, the low-frequency odd eigenmode changes its profile and becomes soft, reflecting the transition of the ground state from uniform to chiral
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
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