1,720,957 research outputs found
Contrôle du champ magnétoélastique local dans des réseaux de nanostructures pour des applications de straintronic
No full textFlexible systems present interesting properties for electronic applications requiring conformable and deformable devices to have complex geometries. On the other hand, spintronic devices allow miniaturization and low energy consumption of devices with a wide frequency band. Combining flexibility and devices based on spintronics gives rise to devices that fall within the field of straintronics, which is a field of research in the physics of dense matter, and which is interested in the effects induced in solids by mechanical deformations. The nanostructuring reveals other extraordinary properties, in particular band structures which are much used in electronics. This nanostructuring also induces effects on the distribution of strain fields within it. The objective of this thesis is therefore to study the influence of these strain fields on the magnetic response of nanostructures deposited on flexible substrates. These studies were carried out on two complementary aspects, namely the experimental study which was conducted in situ in ferromagnetic resonance and which consisted in deforming the nanostructures on flexible substrate, the other aspect is purely numerical for the good understanding and interpretation of the experimental results. In this context, a methodology has been developed and an in-house calculation code has been created at LSPMLes systèmes flexibles présentent des propriétés intéressantes pour les applications électroniques nécessitant des dispositifs conformables et déformables pour avoir des géométries complexes. D’autre part, les dispositifs spintroniques permettent une miniaturisation et une faible consommation énergétiques des dispositifs ayant une large bande fréquentielle. Combiner la flexibilité et des dispositifs basés sur la spintronique donne naissance à des dispositifs qui s’inscrivent dans le champ de la straintronique qui est un champ de recherche dans le domaine de la physique de la matière dense, et qui s’intéresse aux effets induit dans les solides par les déformations mécaniques. La nanostructuration fait apparaître d’autres propriétés extraordinaires notamment des structures de bandes qui sont beaucoup utilisées en électronique. Cette nanostructuration induit aussi des effets sur la distribution des champs de déformation en son sein. L’objectif de cette thèse est donc l’étude de l’influence de ces champs de déformation sur la réponse magnétique des nanostructures déposées sur substrat flexible. Ces études se sont déroulées sur deux volets complémentaires à savoir l’étude expérimentale qui a été conduite in situ en résonance ferromagnétique et qui a consisté à déformer les nanostructures sur substrat flexible, l’autre volet est purement numérique pour la bonne compréhension et interprétation des résultats expérimentaux. Dans ce contexte, une méthodologie a été développée et un code de calcul maison a vu le jour au LSP
Local magnetoelastic field control in nanostructure arrays for straintronic applications
No full textLes systèmes flexibles présentent des propriétés intéressantes pour les applications électroniques nécessitant des dispositifs conformables et déformables pour avoir des géométries complexes. D’autre part, les dispositifs spintroniques permettent une miniaturisation et une faible consommation énergétiques des dispositifs ayant une large bande fréquentielle. Combiner la flexibilité et des dispositifs basés sur la spintronique donne naissance à des dispositifs qui s’inscrivent dans le champ de la straintronique qui est un champ de recherche dans le domaine de la physique de la matière dense, et qui s’intéresse aux effets induit dans les solides par les déformations mécaniques. La nanostructuration fait apparaître d’autres propriétés extraordinaires notamment des structures de bandes qui sont beaucoup utilisées en électronique. Cette nanostructuration induit aussi des effets sur la distribution des champs de déformation en son sein. L’objectif de cette thèse est donc l’étude de l’influence de ces champs de déformation sur la réponse magnétique des nanostructures déposées sur substrat flexible. Ces études se sont déroulées sur deux volets complémentaires à savoir l’étude expérimentale qui a été conduite in situ en résonance ferromagnétique et qui a consisté à déformer les nanostructures sur substrat flexible, l’autre volet est purement numérique pour la bonne compréhension et interprétation des résultats expérimentaux. Dans ce contexte, une méthodologie a été développée et un code de calcul maison a vu le jour au LSPMFlexible systems present interesting properties for electronic applications requiring conformable and deformable devices to have complex geometries. On the other hand, spintronic devices allow miniaturization and low energy consumption of devices with a wide frequency band. Combining flexibility and devices based on spintronics gives rise to devices that fall within the field of straintronics, which is a field of research in the physics of dense matter, and which is interested in the effects induced in solids by mechanical deformations. The nanostructuring reveals other extraordinary properties, in particular band structures which are much used in electronics. This nanostructuring also induces effects on the distribution of strain fields within it. The objective of this thesis is therefore to study the influence of these strain fields on the magnetic response of nanostructures deposited on flexible substrates. These studies were carried out on two complementary aspects, namely the experimental study which was conducted in situ in ferromagnetic resonance and which consisted in deforming the nanostructures on flexible substrate, the other aspect is purely numerical for the good understanding and interpretation of the experimental results. In this context, a methodology has been developed and an in-house calculation code has been created at LSP
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
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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