1,720,953 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Synoptic Regimes and δ18O: A Model-Based Approach to Climate Variability
Get PDFDiese Dissertation entwickelt einen innovativen, modellgestützten Ansatz zur physikalisch konsistenten Interpretation stabiler Sauerstoffsotope (δ18O) in Speläothemen mit dem Ziel, großskalige atmosphärische Zirkulationsmuster und Niederschlagsprozesse vergangener Klimaperioden belastbar zu rekonstruieren. Zentral ist die Verknüpfung eines isotopenfähigen globalen Zirkulationsmodells (EMAC/H2OISO) mit einer objektiven dynamischen Klassifikation großskaliger Wetterregimes (Diagnostic Synoptic Regime Model, DSRM). Ergänzt wird dieser Ansatz durch vier differenzierte Isotopengewichtungen: ungewichtete δ18O-Werte des Niederschlags sowie niederschlags-, infiltrations- und kalzitgewichtete δ18O, die jeweils unterschiedliche Prozesse der Signalentstehung abbilden. Für das heutige Klima wurden 30-jährige Simulationen unter Verwendung moderner atmosphärischer Randbedingungen durchgeführt und anhand von 12 deutschen GNIP-Stationen validiert. Dabei zeigte sich eine systematische Überschätzung der ungewichteten δ18O-Werte um etwa 1 ‰ bis 3 ‰, welche durch Niederschlagsgewichtung weitgehend korrigiert werden konnte. Eine Hauptkomponentenanalyse ergab, dass Temperatur, Niederschlag und das vorherrschende synoptische Regime gemeinsam rund 50% der Variabilität zwischen den Stationen erklären und somit deren zentrale Rolle bei der Steuerung isotopischer Signale unterstreichen. Unter Bedingungen des Letzten Glazialen Maximums (LGM) verändert sich die atmosphärische Zirkulation über Europa und dem Mittelmeerraum deutlich: Zonale Flüsse und zyklonale Regime nehmen ab, während meridionale Muster und antizyklonale Regime zunehmen. Der Abgleich modellierter δ18O-Signale mit 14 mediterranen Speläothem Datensätzen aus dem SISAL-Archiv zeigt, dass insbesondere in infiltrations- und kalzitgewichtete Signale die beobachtete Proxy-Variabilität am besten reproduzieren. Im mediterranen LGM-Szenario führen zyklonale Regime zu ausgeprägter isotopischer Abreicherung, antizyklonale Hochdrucklagen hingegen zu Anreicherung. Eine markante Ost-West-Differenzierung spiegelt die unterschiedlichen Feuchtigkeitsquellen wider, welche für europäisch atlantische bzw. mediterrane Regionen charakteristisch sind. Die Ergebnisse belegen, dass die Kombination aus dynamischer Regimeklassifikation und physikalisch fundierter Isotopengewichtung eine robuste Rekonstruktion atmosphärischer Dynamik aus terrestrischen Speläothem-Archiven ermöglicht. Der Ansatz eignet sich sowohl für die Analyse heutiger Klimabedingungen als auch für komplexe glaziale Szenarien und liefert wertvolle Einblicke in die Kopplung von großskaliger Zirkulation, regionalem Hydroklima und isotopischer Signaturbildung in terrestrischen Sedimenten.This dissertation develops an innovative, model-based framework for the physically
consistent interpretation of stable oxygen isotopes (δ18O) in speleothems, with the aim
of robustly reconstructing large-scale atmospheric circulation patterns and precipitation processes of past climate periods. Central to this approach is the integration of an isotope-enabled general circulation model (EMAC/H2OISO), an objective and dynamic classification of large-scale weather regimes (Diagnostic Synoptic Regime Model, DSRM), and four differentiated isotope weighting schemes (unweighted δ18O in precipitation, precipitation-, in ltration-, and calcite-weighted δ18O), each representing distinct processes of signal formation. For present-day climate, 30-year simulations
using modern atmospheric boundary conditions were conducted and validated against
12 German GNIP stations. These revealed a systematic overestimation of unweighted
δ18O values by approx. 1 ‰ to 3 ‰, which can largely be mitigated by applying precipitation weighting. A principal component analysis confirmed that temperature, precipitation, and the prevailing synoptic regime together explain approximately 50% of the variability, underscoring their importance as key drivers of isotopic signals. Under Last Glacial Maximum (LGM) conditions, atmospheric circulation over Europe and the Mediterranean region shifts significantly: the frequency of zonal flows and cyclonic
regimes decreases, while meridional patterns and anticyclonic regimes become more
prevalent. A comparison of modeled δ18O signals with 14 Mediterranean speleothem
records from the SISAL database shows that infiltration- and especially calcite-weighted
signals best reproduce observed proxy variability. In the Mediterranean LGM scenario,
cyclonic regimes lead to pronounced isotopic depletion, while anticyclonic regimes result in isotopic enrichment. A pronounced eastwest gradient reflects the contrasting
moisture sources characteristic of the Atlantic and Mediterranean domains. The results
demonstrate that the methodological combination of DSRM classification and physically motivated isotope weighting enables a robust and reproducible reconstruction of
atmospheric dynamics from terrestrial speleothem archives. This framework is applicable to both modern climate analysis and complex glacial conditions, offering valuable
insights into the coupling between large-scale circulation, regional hydroclimate variability, and isotopic signal formation in terrestrial sediments.103 Seiten ; Illustrationen, Diagramm
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
- …
