1,726,184 research outputs found
Biografisch Woordenboek Gelderland I Hilversum:Verloren ,1999 90-6550-587-3
No full textItem does not contain fulltextP.W. van Wissing Biografisch Woordenboek Gelderland I Hilversum:Verloren ,1999 90-6550-587-
Appendix D. The sedimentary change at 6550 cal. yr BP: potential causes and consequences.
No full textThe sedimentary change at 6550 cal. yr BP: potential causes and consequences
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
MOLECULAR ROTATION IN THE PRESENCE OF INTRAMOLECULAR VIBRATIONAL REDISTRIBUTION: MOTIONAL NARROWING OF TRIFLUOROPROPYNE AT .
No full textAuthor Institution: Department of Chemistry, University of VirginiaWe present the basic principles of dynamic rotational spectroscopy for the highly vibrationally excited symmetric top molecule trifluoropropyne . Single molecular eigenstate rotational spectra of TFP were recorded in the region of the first overtone of the acetylenic stretching mode at by infrared-pulsed microwave-Fourier transform microwave (IR pMW-FTMW) triple resonance spectroscopy. The average rotational constant (B) of the highly vibrationally mixed quantum states at is 2909.33 MHz, a value that is 40 MHz larger than the rotational constant expected for the unperturbed C-H stretch overtone (2869.39 MHz). The average rotational constant and rotational line shape of the molecular eigenstate rotational spectra are compared to the distribution of rotational constants expected for the ensemble of normal-mode vibrational states at that can interact by intramolecular vibrational energy redistribution (IVR). The normal-mode population distribution at can be described using a Boltzmann distribution with a microcanonical temperature of 1200 K. At this energy the rotational constant distribution in the normal-mode basis set is peaked at 2910 MHz with a width of approximately 230 MHz FWHM. The experimentally measured dynamic rotational spectra are centered at the normal-mode distribution peak however, the spectral width is significantly narrower (40 MHz FWHM) than the normal-mode ensemble width. This reduction of the width, along with the Lorentzian shape of the ensemble eigenstate rotational spectrum when compared to the Gaussian shape of the calculated ensemble distribution, illustrates the narrowing of the spectrum due to IVR exchange. The IVR exchange rate was determined to be 120 ps, 5-10 times faster than the rate at which energy is redistributed from the v=2 level of the acetylenic stretch
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
Spectators van hartstocht. Sekse en emotionele cultuur in de achttiende eeuw Hilversum:Verloren ,1998 90-6550-595-4
No full textItem does not contain fulltextDorothée Sturkenboom Spectators van hartstocht. Sekse en emotionele cultuur in de achttiende eeuw Hilversum:Verloren ,1998 90-6550-595-
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