1,732,631 research outputs found
Two new subfamilies in Lamiaceae
No full textTwo new subfamilies, Callicarpoideae Bo Li & R.G.Olmstead and Tectonoideae Bo Li & R.G.Olmstead, are established within the mint family. Their morphology, distribution, generic and species diversity, homotypic tribes, and phylogenetic position are noted.</jats:p
Fu hun he re ba- nie- lin jin shu bo li zhong de xuan jie xian fen jie
No full textWu, Zhenduo = 負混合熱鈀-鎳-磷金屬玻璃中的旋節線分解 / 吳楨舵.Thesis Ph.D. Chinese University of Hong Kong 2015.Includes bibliographical references.Abstracts also in Chinese.Title from PDF title page (viewed on 09, December, 2016).Wu, Zhenduo = Fu hun he re ba- nie- lin jin shu bo li zhong de xuan jie xian fen jie / Wu Zhenduo
sj-doc-1-trr-10.1177_03611981221110225 – Supplemental material for Predicting for Traffic Risk Degree: Novel Prediction Method and Samples
No full textSupplemental material, sj-doc-1-trr-10.1177_03611981221110225 for Predicting for Traffic Risk Degree: Novel Prediction Method and Samples by Bo Li in Transportation Research Record</p
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
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
Anatomy of cage formation in a two-dimensional glass-forming liquid
No full textAs a glass-forming liquid is cooled, the dynamics of its constituent particles changes
from being liquid-like to more solid-like. The solidity of the resulting glassy material is
believed to be due to a cage-formation process, whereby the motion of individual
particles is increasingly constrained by neighbouring particles. This process begins at
the temperature (or particle density) at which the glass-forming liquid first shows
signs of glassy dynamics; however, the details of how the cages form remain
unclear1–4. Here we study cage formation at the particle level in a two-dimensional
colloidal suspension (a glass-forming liquid). We use focused lasers to perturb the
suspension at the particle level and monitor the nonlinear dynamic response of
the system using video microscopy. All observables that we consider respond
non-monotonically as a function of the particle density, peaking at the density at
which glassy dynamics is first observed. We identify this maximum response as being
due to cage formation, quantified by the appearance of domains in which particles
move in a cooperative manner. As the particle density increases further, these local
domains become increasingly rigid and dominate the macroscale particle dynamics.
This microscale rheological deformation approach demonstrates that cage
formation in glass-forming liquids is directly related to the merging of such domains,
and reveals the first step in the transformation of liquids to glassy materials1,5.11Nsciescopu
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