1,723,207 research outputs found
Linked collectors and determiners for: Jurica-Suchy Nature Museum at Benedictine University Egg Specimens (Arctos).
No full textNatural history specimen data linked to collectors and determiners held within, "Jurica-Suchy Nature Museum at Benedictine University Egg Specimens (Arctos)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/f269f7b1-ad56-45d0-8641-8bc0e84b411a">https://bionomia.net/dataset/f269f7b1-ad56-45d0-8641-8bc0e84b411a</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/f269f7b1-ad56-45d0-8641-8bc0e84b411a">https://gbif.org/dataset/f269f7b1-ad56-45d0-8641-8bc0e84b411a</a>. Formatted as a Frictionless Data package
铜绿微囊藻毒株M.8641的毒素
No full textM.8641是从武汉东湖分离培养的一株有毒的铜绿微囊藻(Microcystis aeruginosa),它产生两种环状短肽肝毒素。经凝胶过滤及HPLC等过程纯化,Waters Pico Tag系统测定,其主毒素(毒素Ⅰ)的氨基酸组成为:Glu(1),β-Masp(1),Ala(Ⅰ),Arg(2),Mdha(1),FAB-MS和MS/MS测定分子量为m/z1038,元素组成为C_(49)H_(76)O_(12)N_(13)。毒素Ⅱ的氨基酸组成,除一分子Arg为Leu取代外,其余与毒素Ⅰ相同,分子量m/z
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
A disjointly tight irresolvable space
Full text link[EN] In this short note we prove the existence (in ZFC) of a completely regular countable disjointly tight irresolvable space by showing that every sub-maximal countable dense subset of 2c is disjointly tight.The research of the first author was supported by the
grand PIACERI 2020/22 (linea 2) from the University of Catania. The research
of the second author was supported by PAPIIT grant IN104220, and by a
CONACyT grant A1-S-16164.Bella, A.; Hrusak, M. (2020). A disjointly tight irresolvable space. Applied General Topology. 21(2):326-329. https://doi.org/10.4995/agt.2020.13836OJS326329212O. T. Alas, M. Sanchis, M. G. Tkacenko, V. V. Tkachuk and R. G. Wilson, Irresolvable and submaximal spaces: Homogeneity versus -discreteness and new ZFC examples, Topol. Appl. 107 (2000), 259-273. https://doi.org/10.1016/S0166-8641(99)00111-XA. Bella and V. I. Malykhin, Tightness and resolvability, Comment. Math. Univ. Carolinae 39, no. 1 (1998), 177-184.E. K. van Douwen, Applications of maximal topologies, Topol. Appl. 51 (1993), 125-139. https://doi.org/10.1016/0166-8641(93)90145-4R. Engelking, General topology, Heldermann Verlag, Berlin, 1989.E. Hewitt, A problem of set-theoretic topology, Duke Math. J. 10 (1943), 309-333. https://doi.org/10.1215/S0012-7094-43-01029-4I. Juhász, L. Soukup and Z. Szentmiklóssy, D-forced spaces: A new approach to resolvability, Topol. Appl. 153, no. 11 (2006), 1800-1824. https://doi.org/10.1016/j.topol.2005.06.007K. Kunen, Set theory an introduction to independence proofs, North-Holland, Amsterdam, 1980
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
A HIPERTÓNIA FELISMERÉSÉNEK, CÉLÉRTÉKRE VALÓ KEZELÉSÉNEK ÉS A BETEG-EGYÜTTMŰKÖDÉS FENNTARTÁSÁNAK FONTOSSÁGA
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