1,720,970 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
Effect of Electric Field on Relaxor Ferroelectrics Studied by Brillouin Scattering and Dielectric Spectroscopy
No full textGROWTH PERFORMANCE AND HAEMATOLOGICAL PROFILE OF GROWING JAPANESE QUAILS FED GRADED LEVELS OF Moringa oleifera LEAF MEAL
Get PDFSher-e-Bangla Agricultural University Research System (SAURES
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
ブリルアン散乱と誘電分光によるリラクサー強誘電体の電場効果の研究
Get PDF筑波大学University of Tsukuba博士（工学）Doctor of Philosophy in Engineering2017doctoral thesi
Understanding the road traffic congestion relief impacts of public transport
No full textThe primary objective of this research is to understand the congestion relief impacts of public transport. It is suggested in this research that none of the existing measures of traffic congestion provides information on the extent to which traffic congestion is relieved by public transport. In addition, previous studies related to traffic congestion relief have not quantified the relationship between the presence of public transport and the amount of traffic congestion of a city. The research develops a new measurement index which can be used as a relative measure of the city-wide congestion relief impacts of public transport. The proposed research framework consists of three main components: a congestion relief valuation framework that compiles relevant evaluation research and explores mode shift; an experimental modelling approach that analyses changes in congestion measures as a result of alternative public transport scenarios; and a relative measure development method that constructs a congestion relief index for expressing the city wide congestion relief impact of public transport in a generalised form. An examination of secondary evidence demonstrating changes in mode split associated with changes in public transport suggests that about one third of existing public transport users would contribute to additional car trips if public transport were removed. This includes all car drivers and half of the car passengers. A comparative assessment of international research valuing the congestion relief benefits of public transport reveals that congestion relief impacts are valued at between 4.4 and 151.4 Australian cents (2008 value) per marginal vehicle-kilometre of travel with an average of 45.0 cents. Valuations are higher for circumstances with greater degrees of traffic congestion and also where both travel time and vehicle operating cost savings are considered. Experimental transport modelling analysis has been performed to understand the spatial distribution of congestion relief and the effects of different public transport modes. In addition, a new measure called the congestion relief index (CRI) has been developed for use as a comparative index of the congestion relief impact of public transport in cities. The proposed CRI integrates a number of different dimensions of city and transport characteristics into a single measure. The lessons learned from this study include (i) public transport plays a significant role in relieving road traffic congestion in cities; (ii) the wider significance of public transport in relieving congestion outside the central location of the metropolitan area challenges the traditional view that public transport and its impact on congestion is an issue only for central cities; (iii) public transport modes differ in their contribution to congestion relief, but the particular characteristics significantly influencing this impact include patronage, trip length, and spatial coverage; (iv) large-scale public transport systems in large cites provide significant high congestion reduction benefits in comparison to a small-scale systems in small cities; (v) the underlying dimensions of elements affecting the congestion relief impact of public transport in cities can be classified into three broad categories – (1) the public transport-oriented factor, (2) the car-deterrence factor, and (3) the urbanform factor; (vi) the car-deterrence factor has the strongest influence on public transport congestion relief, followed by the public transport-oriented factor and the urban-form factor; (vii) high congestion relief impacts are obtained in cities characterised by high public transport availability and patronage, high urban density and low car ownership and use
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
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