1,861,874 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
Stammbuch C. S.
No full textEnthält 168 Stammbucheinträge u.a. von Johann August Eberhard, Johann Christian Foerster, Georg Christian Knapp, Johann August Noesselt, Ernst Christian Trapp; Register enthaltenHandschrift DE-3, GND 2024680-8, Signatur: Yg St. 8° 66/54Einband: Leder, braun, goldgeprägt mit Initialen C. S. und Jahreszahl 1779 vorn; schwarzes Rückenschild mit Blindprägung; Vorsatz: Buntpapier: mehrfarbig rot blau gelb, Blumen Ranken; dreiseitiger GoldschnittExlibris des Vorbesitzers (Stula) im VorderspiegelZustand: Rücken, Ecken und Kanten beriebenDie ursprüngliche Paginierung umfasst 312 Seiten, wobei Schmutztitel und Register (11 Seiten) nicht gezählt sind. Sie springt mehrfach (Seite 30 zu 33, 92 zu 95, 162 zu 165, 294 zu 297) und lässt hinter Seite 118 und Seite 203 jeweils ein illustriertes Blatt unberücksichtigt. Die Nachpaginierung beginnt mit dem Schmutztitel und endet beim hinteren fliegenden Vorsatzblatt recto (Seite 325). Sie entfällt auf den Seiten 34 bis 92, 119 bis 162 sowie 203 bis 294.Eintragungsorte: Halle (142), Stendal (7), Gotha (5), Pritzwalck (4) u.a.4 Gouachen, 6 Silhouette
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
Review of “St. Clive:” An Eastern Orthodox Author Looks Back at C. S. Lewis
Full text linkReview of C. J. S. Hayward, “St. Clive:” An Eastern Orthodox Author Looks Back at C. S. Lewis (Wheaton, Illinois: C. J. S. Hayward Publications, 2000-19). 381 pages. $49.99. ISBN 9781794669956
Research Brief: Evolving the C-S-H Packing Density at the Microscale
No full textOne page research briefCement paste is a complex multiphase material, roughly 50 percent of which, by volume, is composed of calcium-silicate-hydrates (C-S-H). The C-S-H phase, which lends the material its rigidity, appears to be a dispersion of nanometer-sized particles that densify during the course of the hydration reaction (Ioannidou et al., PNAS 2016). Because the mechanical properties, early-age internal stresses, and microstructure are critically dependent on the distribution of the high density (HD) and low density (LD) C-S-H product, research efforts are underway to better understand nanoparticle packing density at the scale of hundreds of micrometers, where a binary mixture of clinker grains and saturated pore space evolve into a porous hydrated gel. This research brief displays simulated snapshots of cement paste at varying hydration degrees and predicts the evolution of the HD and LD peaks for the distribution of the indentation modulus also observed in nanoindentation experiments.This research was carried out by CSHub@MIT with sponsorship provided by the Portland Cement Association and the Ready Mixed Concrete Research & Education Foundation. CSHub@MIT is solely responsible for content
Preparation of Recyclable and Versatile Porous Poly-Arylthioethers by Reversible Pd-Catalysed C–S/C–S Metathesis
No full textPorous organic polymers have shown a number of promising properties; however, their application is usually hampered due to the lability of their linkages. Inspired by the outstanding chemical, mechanical and thermal resistance of the 1D polymer polyphenylene sulphide (PPS), we have designed a new family of 2D and 3D poly-arylthioethers, synthesised via a mild Pd-catalysed C–S/C–S metathesis-based method, that merges the attractive features common to porous polymers and PPS in a single material. In addition, the method is highly modular, allowing to easily introduce application-oriented functionalities in the materials for a series of environmentally relevant applications including metal capture, metal sensing and heterogeneous catalysis. Moreover, despite their extreme chemical resistance, the polymers can be easily recycled to recover the original monomers, offering an attractive perspective for their sustainable use
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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