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    FIGURE 1 in The holomorph of Arthrinium setariae sp. nov. (Apiosporaceae, Xylariales) from China

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    FIGURE 1.—Phylogram of the best maximum likelihood tree from an analysis of the combined ITS-tub2-tef1 matrix of Arthrinium, with Nigrospora gorlenkoana (CBS 480.73) as the outgroup taxon. Maximum likelihood bootstrap support values ≥ 50% (BT) and Bayesian posterior probabilities ≥ 0.90 (BYPP) are given at the nodes as ML/BYPP.Published as part of Jiang, Ning & Tian, Cheng-Ming, 2021, The holomorph of Arthrinium setariae sp. nov. (Apiosporaceae, Xylariales) from China, pp. 149-159 in Phytotaxa 483 (2) on page 154, DOI: 10.11646/phytotaxa.483.2.7, http://zenodo.org/record/542070

    Effect of ozone addition on oblique detonations in hydrogen-air mixtures

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    Ozone addition is a promising method to enhance the ignition processes and may have potential use in the practical application of oblique detonation engines (ODEs), especially under challenging low Mach number conditions where ignition is hard to achieve. In this study, numerical simulations are conducted to explore the effect of ozone addition on oblique detonations. Numerical results show that with ozone addition, the transition between the induction oblique shock wave (OSW) and oblique detonation wave (ODW) will be smoother at relatively high flight Mach number (from 9 to 10). The reasons for this wave system transformation are dis-cussed. With the addition of ozone, the initiation of ODW can occur at a shorter distance and height, preventing the convergence of compression waves into shocks and resulting in a smoother transition. It was also found that adding ozone is an effective approach to decrease the initiation length, especially at a relatively low Mach number (9), which is crucial to the ODE's thermal protection. Furthermore, the effects of ozone addition on total pressure have been analyzed, demonstrating its positive influence on the propulsion performance of ODE. At a lower flight Mach number (8), ozone addition can re-stabilize the unsteady ODW with a normal detonation wave moving upstream. This is achieved by reducing the size of the subsonic regions, indicating that ozone addition can broaden the working flight Mach numbers of ODEs

    FIGURE 3 in Pestalotiopsis abietis sp. nov. from Abies fargesii in China

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    FIGURE 3—Phylogram of ITS, TEF and TUB regions based on MP and ML analysis. Values above the branches indicate maximum parsimony bootstrap (MP BP ≥ 50 %) and maximum likelihood bootstrap (ML BP ≥ 50 %). Scale bar = 60 nucleotide substitutions.Published as part of Gu, Mo, Hu, Dong-Wei, Han, Bing, Jiang, Ning & Tian, Cheng-Ming, 2021, Pestalotiopsis abietis sp. nov. from Abies fargesii in China, pp. 93-105 in Phytotaxa 509 (1) on page 101, DOI: 10.11646/phytotaxa.509.1.4, http://zenodo.org/record/542601

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The 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

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    “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

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    We 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

    FIGURE 1 in Pestalotiopsis abietis sp. nov. from Abies fargesii in China

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    FIGURE 1—Maximum parsimony phylogeny of Pestalotiopsis species obtained from the combined ITS, TEF and TUB matrix. MP, ML and BI bootstrap support values are shown in order at the nodes. Scale bar = 40 nucleotide substitutions. The new sequences resulting from the current study are in green.Published as part of Gu, Mo, Hu, Dong-Wei, Han, Bing, Jiang, Ning & Tian, Cheng-Ming, 2021, Pestalotiopsis abietis sp. nov. from Abies fargesii in China, pp. 93-105 in Phytotaxa 509 (1) on page 95, DOI: 10.11646/phytotaxa.509.1.4, http://zenodo.org/record/542601
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