1,727,730 research outputs found
Note on the Chen-Lin Result with the Li-Zhang Method
No full textWe give a new proof of the Chen-Lin result with the method of moving sphere in a work of Li-Zhang
Meligethes (Odontogethes) scrobescens Chen, Lin, Huang & Yang 2015
No full textMeligethes (Odontogethes) scrobescens Chen, Lin, Huang & Yang, 2015 (Figs. 22, 34– 35) Taxonomic notes. A single female specimen almost certainly belonging to this uncommon and recently described, potentially endemic species to Sichuan (Chen et al. 2015), was recently collected by the author PA (July 2015) by sweeping in a locality of northern Sichuan (Jiuzhaigou Valley; Nanping area, bushy area above the village of Zhangzha, 2200 m a.s.l., 22.vii. 2015). Although no dissected female specimens of the type series of M. scrobescens that are positively associated with males are now available for study, we describe herein the unknown female genitalia (ovipositor) of this taxon (Fig. 22), based on this isolated specimen. The ovipositor of this species is peculiarly shaped (Fig. 22), with subapical portion abruptly widened and bearing a minute but distinct U-shaped excision distad, curiously similar to the shape of ovipositors known to occur in certain W-Asiatic species of the genus Brachyleptus Motschulsky, 1845 (Kateretidae; Audisio 1989, 1993). Ratio STLE / DSIA ≈ 0.14; ratio STLE / CGOW ≈ 0.05; ratio GONL / CGOW ≈ 1.75. Basal portions of gonocoxites transverse, their laterally directed apices bluntly pointed. Ratio OVPL / GONL ≈ 2.41. Based on available external and genitalic characters, M. scrobescens is probably related to M. luteoornatus Audisio, Sabatelli & Jelínek, 2015 and to other members of the recently defined (Audisio et al. 2015) Meligeth es (Odontogethes) bourdilloni/chinensis group, markedly differing from all known species by the peculiar shape of the ovipositor in females and the median lobe of the aedeagus in males.Published as part of Liu, Meike, Yang, Xingke, Huang, Min, Jelínek, Josef & Audisio, Paolo, 2016, Four new species of Meligethes Stephens from China and additional data on other species of the genus (Coleoptera: Nitidulidae: Meligethinae), pp. 101-116 in Zootaxa 4121 (2) on page 115, DOI: 10.11646/zootaxa.4121.2.1, http://zenodo.org/record/25979
Replication Data for: Local Financial Structure and the Pandemic’s Effect on the Distribution of Employment
No full textThese files contain the replication codes and data files for the RCFS paper “Local Financial Structure and the Pandemic’s Effect on the Distribution of Employment”, by Ross Levine, Chen Lin, and Wensi Xie
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
Investigation of inorganic nanocrystals as electrode material for lithium and sodium ion batteries
No full textThe worldwide demand for a clean, safe, high specific capacity and high energy rechargeable batteries systems keeps increasing. Li-ion batteries (LIBs) and Na-ion batteries (NIBs) have been proved to be reliable technologies, for a large variety of applications, ranging from portable high-end electronics, stationary
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
- …
