1,721,184 research outputs found
Evidence against a long-term control on Earth climate by Galactic Cosmic Ray Flux
No full textChanges in Galactic Cosmic Ray (GCR) flux have been proposed by some as the main factor controlling Earth's climate. This hypothesis, which invokes enhanced formation of low clouds due to ionization of atmospheric aerosol by GCR flux as a control mechanism, implies that climate sensitivity to atmospheric CO2 levels is overestimated. Here we propose to test this conjecture by comparing a deep-time 3.6 million year–long (~30–26.4 million years ago) record of global climate changes with a proxy record of geomagnetic paleointensity fluctuations. At the time scale adopted for this study, the geomagnetic field intensity is the major controller of GCR reaching the Earth. We compare the records of paleointensity, as a proxy for GCR flux fluctuations, and a record of global climate showing that they are substantially independent. We conclude that, the putative role of GCR flux as a cause for medium to long term (103–5 yr) changes in Earth's climate is not supported by evidence
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
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[Examination of Jacob Huber, Matthew Laird, and Michael Hoover concerning General Braddock's defeat].
No full textThere are five examples of this testimony with about the same information. Some words are easier to read in some versions. Three waggoners were examined: Jacob Huber, Matthew Laird, and Michael Hoover. The header on each was the same, inserting the appropriate name. Examination of a waggoner belonging to the Army under the immediate command of General Braddock taken upon oath before the Honorable Robert Hunter Morris, Esq., Governor of the Province of Pennsylvania at Carlisle in the county of Cumberland 17 July 1755. Each man was in Col. Dunbar's camp seven miles west of Great Meadows. Dunbar was the supply officer, responsible for the transportation of massive amounts of food and weapons, so he managed the many waggoners. Each man said rumors flew on the morning of July 10 that something bad had happened. Waggoners and walking wounded began appearing at the camp who told the story of a disastrous defeat after a three hour continuous battle with the French and Indians. General Braddock had been wounded and then murdered by the Indians, all the artillery had been captured, and untold numbers of officers and men were wounded. At about noon, many in Dunbar's camp began the flight east, including each witness. In version four, a piece of fraying cloth obscures a little of the text, but otherwise, it is just a question of puzzling out individual words
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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