1,726,407 research outputs found
Competitive systems with stage structure of distributed delay type.
No full textAbstractThis paper considers a delay differential equation model for the interaction among n species, the adult members of which are in competition. For each of the n species the model incorporates an infinite distributed time delay which represents the time from birth to maturity of that species. Thus, the time delays appear in the adult recruitment terms. The dynamics of the model are determined, and sharp global stability criteria are established for the interior equilibrium as well as the axial equilibrium
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
sj-docx-1-jad-10.1177_10963480211067275 – Supplemental material for Is Your Food Organic? Examining the Role of Food Aesthetics in Restaurant Marketing
No full textSupplemental material, sj-docx-1-jad-10.1177_10963480211067275 for Is Your Food Organic? Examining the Role of Food Aesthetics in Restaurant Marketing by Xi Yu and Stephanie Q. Liu in Journal of Hospitality & Tourism Research</p
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
Megalotomus acutulus G. Q. Liu & Q. Liu 1998
No full text<i>Megalotomus acutulus</i> Liu & Liu, 1998 <p>(Figs. 20–22, 38–40)</p> <p> <i>Megalotomus acutulus</i> G.Q. Liu & Q. Liu, 1998: 41. Holotype: ♂, China (North), Inner Mongolia, Hailar (49.2°N / 119.7°E); NKUM. Dolling, 2006: 38.</p> <p> <b>Diagnosis.</b> This species is recognized within the genus <i>Megalotomus</i> by a combination of the following characters: body size relatively moderate, 12.5–14.0 mm in length, yellowish brown to black, with black punctures; head and pronotum with long, dense pilosity; vertex black, with pale yellow midline and macula on both sides; posterior angle of pronotum slightly upward, not sharp; forewings with small, light-coloured spots, and anterolateral margin pale; meta-femora with 3–5 spines on the inner margin of the terminal half, becoming gradually longer from proximal to terminal; surcapsular spines of the genital capsule acute and straight, extending without any projection or bifurcation; parameres strongly curved upward, elongate and slender, tapering gradually towards apex, and each with one or two prominent acute projections in the middle on the inner side.</p> <p> <b>Material examined.</b> <b>China: Hebei Province:</b> 1 ♂, Xiaowutaishan National Nature Reserve, Donglingshan, 1700 m, 21-August-2005, Xin Yu leg. (NKUM); <b>Inner Mongolia:</b> 3 ♂♂, 1 ♀, Chifeng City, Keshiketeng Banner, Daerhansumu, 1240 m, 9-August-2008, Xueqin Shi leg. (NKUM); <b>Shanxi Province:</b> 4 ♂♂, 1 ♀, Xinzhou City, Wutai County, Taihuai Town, Wutaishan National Nature Reserve, Xinyinsi Temple, 39.01°N, 113.63°E, 1844 m, 13-August-2020, Wenbo Yi leg. (XZTU); 9 ♂♂, 4♀♀, Xinzhou City, Wutai County, Taihuai Town, Wutaishan National Nature Reserve, Loushang Village, 39.00°N, 113.65°E, 1924 m, 13-August-2020, Wenbo Yi leg. (XZTU); 8 ♂♂, 3 ♀♀, Xinzhou City, Wutai County, Taihuai Town, Wutaishan National Nature Reserve, Muwagou, 39.03°N, 113.62°E, 1849 m, 14-August-2020, Wenbo Yi leg. (XZTU).</p> <p> <b>Distribution.</b> China (Hebei, Inner Mongolia, Shanxi).</p> <p> <b>Remarks.</b> This species is readily recognized within the genus <i>Megalotomus</i> by its diagnostic characters, as thoroughly described and illustrated in Liu & Liu (1998). During field work in Wutaishan National Nature Reserve, Shanxi Province, China, large amounts of adults of this species were found on <i>Melilotus officinalis</i>, a common herbaceous plant of Leguminosae, which is highly suspected to be the host plant of this species, since there are no previous host records.</p>Published as part of <i>Yi, Wenbo, Wang, Shijun, Zhang, Hufang & Bu, Wenjun, 2022, Notes on Megalotomus Fieber, 1860 in the Palaearctic Region (Hemiptera, Heteroptera, Alydidae), pp. 211-224 in Zootaxa 5128 (2)</i> on page 219, DOI: 10.11646/zootaxa.5128.2.3, <a href="http://zenodo.org/record/6479798">http://zenodo.org/record/6479798</a>
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
sj-docx-1-jht-10.1177_10963480221074280 – Supplemental material for When and why Language Assertiveness Affects Online Review Persuasion
No full textSupplemental material, sj-docx-1-jht-10.1177_10963480221074280 for When and why Language Assertiveness Affects Online Review Persuasion by Huiling Huang, Stephanie Q. Liu and Zhi Lu in Journal of Hospitality & Tourism Research</p
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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