1,720,953 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
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
Étude de la microstructure et des propriétés émissives des membranes ultrafines MoSiN nanocomposites autoportantes
No full textThe growing demand for compact, energy-efficient, and robust mid-infrared (mid-IR) light sources is driving the development of advanced thermal emitters for next-generation hightemperature gas sensing technologies. Mid-IR gas sensors, in particular, benefit from this spectral range due to the strong and selective molecular absorption features of most gases. However, their development remains constrained by the lack of efficient, low-power, and thermally stable emitter materials capable of reaching the high temperature (600-1000°C) needed for strong emission across the mid-IR broadband range. Conventional microheaterbased emitters suffer from high power consumption, slow thermal response, and material degradation during repeated heating cycles. Addressing these limitations requires materials that combine high emissivity, thermal stability, and mechanical resilience at nanoscale thicknesses. Reducing the membrane thickness lowers thermal mass, minimizing power consumption and enabling faster heating and cooling for enhanced thermal response. For nanoscale membranes where both high emissivity and mechanical strength are critical, integrating these attributes within a composite material offers an effective and promising solution. In this context, this study develops and investigates ultrathin freestanding MoSiN nanocomposite membranes, examining their structural, optical, and thermal properties to assess their suitability as efficient, low-power, and thermally stable mid-IR emitters for compact and reliable gas sensing applications. Freestanding MoSiN membranes, 6-16 nm thick with lateral dimensions of 10 mm × 10 mm supported on silicon frames, were fabricated and characterized. The microstructure and composition of the ultrathin MoSiN membranes were thoroughly studied to elucidate the distribution of intermetallic and dielectric phases. The microstructural analysis reveals that MoSiN possess a complex nanocomposite structure, comprising intermetallic phases (MoSi2 and Mo5Si3) and silicon oxynitride (SiOxNy) dielectric phase. The intermetallic phases facilitate free-carrier absorption in the mid-IR region, while the dielectric phase enhances mechanical integrity and provides strong resistance to oxidation. Membrane exhibits metal-like emissivity (~0.41) and retains thermal and mechanical stability at high temperature (900°C). Repeated laser pulsed-heating experiments confirm rapid thermal response, excellent repeatability, and efficient radiative cooling, validating its potential as a durable microheater emitter material. FTIR spectroscopy shows broadband absorption in the 2-8 µm range, dominated by free-carrier processes, with negligible phonon absorption beyond 8 µm. Emissivity shows a strong thickness dependence due to interference effects, as confirmed by optical modeling using Fresnel equations and the generalized matrix method. Electrical characterization shows resistivity (~10 -4 Ω•cm) with a positive temperature coefficient, indicating metallic conduction. Overall, MoSiN behaves as a semimetal combining metallic absorption and dielectric-induced stability. These results highlight ultrathin freestanding MoSiN membranes as a compelling platform for mid-infrared emitters, offering a synergistic combination of low power, thermal iii efficiency, mechanical durability, and CMOS compatibility for gas sensing applications in harsh environments.To my dearest Daddy, Mummy, and Neethu-Your boundless love, selfless sacrifices, and quiet strength have sustained me in ways words cannot fully captureLa demande croissante en sources lumineuses compactes, écoénergétiques et robustes dans le domaine de l'infrarouge moyen (IR moyen) stimule le développement d'émetteurs thermiques avancés pour les technologies de détection de gaz à haute température de nouvelle génération. Les capteurs de gaz à infrarouge moyen, en particulier, tirent parti de cette gamme spectrale en raison des caractéristiques d'absorption moléculaire fortes et sélectives de la plupart des gaz. Cependant, leur développement reste limité par le manque de matériaux émetteurs efficaces, à faible consommation d'énergie et thermiquement stables, capables d'atteindre la température élevée (~900°C) nécessaire pour une émission forte dans toute la gamme à large bande de l'infrarouge moyen. Les émetteurs conventionnels à micro-réchauffeurs souffrent d'une consommation d'énergie élevée, d'une réponse thermique lente et d'une dégradation des matériaux lors de cycles de chauffage répétés. Pour remédier à ces limitations, il faut des matériaux qui combinent une émissivité élevée, une stabilité thermique et une résilience mécanique à des épaisseurs nanométriques. La réduction de l'épaisseur de la membrane diminue la masse thermique, minimise la consommation d'énergie et permet un chauffage et un refroidissement plus rapides pour une réponse thermique améliorée. Pour les membranes à l'échelle nanométrique où une émissivité élevée et une résistance mécanique sont essentielles, l'intégration de ces propriétés dans un matériau composite offre une solution efficace et prometteuse. Dans ce contexte, cette étude développe et examine des membranes nanocomposites MoSiN ultrafines autonomes, en étudiant leurs propriétés structurelles, optiques et thermiques afin d'évaluer leur adéquation en tant qu'émetteurs infrarouges moyens efficaces, à faible consommation d'énergie et thermiquement stables pour des applications compactes et fiables de détection de gaz. Des membranes MoSiN autonomes, d'une épaisseur de 6 à 16 nm et de dimensions latérales de 10 mm × 10 mm, supportées par des cadres en silicium, ont été fabriquées et caractérisées. La microstructure et la composition des membranes MoSiN ultrafines ont été étudiées de manière approfondie afin d'élucider la distribution des phases intermétalliques et diélectriques. L'analyse microstructurale révèle que le MoSiN possède une structure nanocomposite complexe, comprenant des phases intermétalliques (MoSi2 et Mo5Si3) et une phase diélectrique d'oxynitrure de silicium (SiOxNy). Les phases intermétalliques facilitent l'absorption des porteurs libres dans la région de l'infrarouge moyen, tandis que la phase diélectrique améliore l'intégrité mécanique et offre une forte résistance à l'oxydation. La membrane présente une émissivité de type métallique (~0.41) et conserve sa stabilité thermique et mécanique à haute température (900°C). Des expériences répétées de chauffage par impulsions laser confirment une réponse thermique rapide, une excellente répétabilité et un refroidissement radiatif efficace, validant son potentiel en tant que matériau émetteur micro-chauffant durable. La spectroscopie FTIR montre une absorption à large bande dans la gamme 2-8 µm, dominée par des processus de porteurs libres, avec une absorption phononique négligeable au-delà de 8 µm. L'émissivité montre une forte dépendance à l'épaisseur due à des effets d'interférence, comme le confirment la modélisation optique à l'aide des équations de Fresnel et la méthode matricielle généralisée. La caractérisation électrique montre une résistivité (~10-4 Ω·cm) avec un coefficient de température positif, indiquant une conduction métallique. Dans l'ensemble, le MoSiN se comporte comme un semi-métal combinant une absorption métallique et une stabilité induite par diélectrique. Ces résultats mettent en évidence les membranes MoSiN ultrafines autonomes comme une plateforme convaincante pour les émetteurs infrarouges moyens, offrant une combinaison synergique de faible puissance, d'efficacité thermique, de durabilité mécanique et de compatibilité CMOS pour les applications de détection de gaz dans des environnements difficiles
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
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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