1,721,896 research outputs found
Two new synonyms of Rhopalopsole basinigra Yang & Yang, 1995 (Plecoptera: Leuctridae) with taxonomic notes on Rhopalopsole tianmuana Sivec & Harper, 2008
No full textLuo, Jun, Yao, Gang, Wang, Mingju, Li, Weihai (2022): Two new synonyms of Rhopalopsole basinigra Yang & Yang, 1995 (Plecoptera: Leuctridae) with taxonomic notes on Rhopalopsole tianmuana Sivec & Harper, 2008. Zootaxa 5188 (3): 290-296, DOI: 10.11646/zootaxa.5188.3.
Comparison of tests for spatial heterogeneity on data with global clustering patterns and outliers
Full text linkAbstract Background The ability to evaluate geographic heterogeneity of cancer incidence and mortality is important in cancer surveillance. Many statistical methods for evaluating global clustering and local cluster patterns are developed and have been examined by many simulation studies. However, the performance of these methods on two extreme cases (global clustering evaluation and local anomaly (outlier) detection) has not been thoroughly investigated. Methods We compare methods for global clustering evaluation including Tango's Index, Moran's I, and Oden's I*pop; and cluster detection methods such as local Moran's I and SaTScan elliptic version on simulated count data that mimic global clustering patterns and outliers for cancer cases in the continental United States. We examine the power and precision of the selected methods in the purely spatial analysis. We illustrate Tango's MEET and SaTScan elliptic version on a 1987-2004 HIV and a 1950-1969 lung cancer mortality data in the United States. Results For simulated data with outlier patterns, Tango's MEET, Moran's I and I*pop had powers less than 0.2, and SaTScan had powers around 0.97. For simulated data with global clustering patterns, Tango's MEET and I*pop (with 50% of total population as the maximum search window) had powers close to 1. SaTScan had powers around 0.7-0.8 and Moran's I has powers around 0.2-0.3. In the real data example, Tango's MEET indicated the existence of global clustering patterns in both the HIV and lung cancer mortality data. SaTScan found a large cluster for HIV mortality rates, which is consistent with the finding from Tango's MEET. SaTScan also found clusters and outliers in the lung cancer mortality data. Conclusion SaTScan elliptic version is more efficient for outlier detection compared with the other methods evaluated in this article. Tango's MEET and Oden's I*pop perform best in global clustering scenarios among the selected methods. The use of SaTScan for data with global clustering patterns should be used with caution since SatScan may reveal an incorrect spatial pattern even though it has enough power to reject a null hypothesis of homogeneous relative risk. Tango's method should be used for global clustering evaluation instead of SaTScan.</p
FIGURE 3 in First records of the subfamilies Ecliminae and Lomatiinae (Diptera, Bombyliidae) from China with description of two new species
No full textFIGURE 3. Lomatia shanguii sp. nov.: Paratype ♀, right wing, dorsal view.Published as part of Yao, Gang, Luo, Jun, Li, Xuankun & Yang, Ding, 2022, First records of the subfamilies Ecliminae and Lomatiinae (Diptera, Bombyliidae) from China with description of two new species, pp. 396-408 in Zootaxa 5094 (3) on page 400, DOI: 10.11646/zootaxa.5094.3.2, http://zenodo.org/record/597416
FIGURE 6 in First records of the subfamilies Ecliminae and Lomatiinae (Diptera, Bombyliidae) from China with description of two new species
No full textFIGURE 6. Thevenetimyia cingulata sp. nov.: Holotype ♂, lateral habitus.Published as part of Yao, Gang, Luo, Jun, Li, Xuankun & Yang, Ding, 2022, First records of the subfamilies Ecliminae and Lomatiinae (Diptera, Bombyliidae) from China with description of two new species, pp. 396-408 in Zootaxa 5094 (3) on page 403, DOI: 10.11646/zootaxa.5094.3.2, http://zenodo.org/record/597416
Cesiribacter roseus sp. nov., a pink-pigmented bacterium isolated from desert sand
No full textMing Liu, Huan Qi, Xuesong Luo, Jun Dai, Fang Peng and Chengxiang Fang (2012): Cesiribacter roseus sp. nov., a pink-pigmented bacterium isolated from desert sand. International Journal of Systematic and Evolutionary Microbiology 62: 96-99, DOI: 10.1099/ijs.0.028423-
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
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