1,721,213 research outputs found
FEDERALISMO E DEVOLUZIONE PROFILI FISCALI
No full textL'articolo rappresenta il primo contributo scientifico sulle conseguenze fiscali e finanziari sull'autonomia fiscale e finanziaria delle regioni dalla recentissima modifica costituzionale dello Stato in senso devolutiv
Electric field effect on magnetic interface phenomena
Full text linkL'abstract è presente nell'allegato / the abstract is in the attachmen
Atti societari ed imposizione indiretta. Dalle Direttive comunitarie alla nuova riforma tributaria
No full textDisentangling electric field effect on spin waves in ferromagnetic insulators
Full text linkIn this paper we extend the micromagnetic theory of magnetostatic surface waves in insulating ferromagnetic thin films to include the applied electric field effects. We start by identifying the two main effects on the dispersion relation: the first one is of relativistic nature and emerges as a consequence of the Aharonov–Casher effect, while the second one is a consequence of the electric field induced symmetry breaking operating at the level of magnetic exchange interactions. We support our theory by comparing its predictions with experimental data on ittrium iron garnet thin films taken from the literature. The main result is to evidence the limitations
of using the same value of the applied electric field to address both effects and to emphasize that crystal symmetry breaking due to the applied electric field brings about the contributions of the crystal field and determines different amplitudes for the two effects
Domain wall statics and dynamics in nanowires with arbitrary Dzyaloshinskii-Moriya tensors
Full text linkThe influence of different Dzyaloshinskii-Moriya interaction (DMI) tensor
components on the static and dynamic properties of domain walls (DWs) in
magnetic nanowires is investigated using one dimensional collective coordinates
models and micromagnetic simulations. It is shown how the different
contributions of the DMI can be compactly treated by separating the symmetric
traceless, antisymmetric and diagonal components of the DMI tensor. First, we
investigate the effect of all different DMI components on the static DW tilting
in the presence and absence of in plane (IP) fields. We discuss the
possibilities and limitations of this measurement approach for arbitrary DMI
tensors. Secondly, the interplay of different DMI tensor components and their
effect on the field driven dynamics of the DWs are studied and reveal a
non-trivial effect of the Walker breakdown field of the material. It is shown
how DMI tensors combining diagonal and off-diagonal elements can lead to a
non-linear enhancement of the Walker field, in contrast with the linear
enhancement obtainable in the usual cases (interface DMI or bulk DMI)
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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