1,721,407 research outputs found
Sinonamuropteris ningxiaensis Peng, Hong & Zhang 2005
No full text<i>Sinonamuropteris ningxiaensis</i> Peng, Hong & Zhang, 2005 <p>Fig. 1</p> <p> <b>Material.</b> Neotype — Specimen CNU-NX1-161, positive and negative imprints of a nearly complete insect; here designated; deposited in the Key Lab of Insect Evolution and Environmental Changes, College of Life Science, Capital Normal University (CNU, Ren Dong, Curator; Beijing, China).</p> <p> <b>Type locality and horizon.</b> The Late Carboniferous (Tupo Formation) locality near the Xiaheyan village (Zhongwei City, Ningxia Hui Autonomous Region, China).</p> <p> <b>Description. Body</b> : head 1.5 mm long, 1.0 mm wide; antennae filiform, with 7 segments preserved in right one; pronotum broken, estimated length 0.9 mm, estimated width 0.8 mm; mesothorax 1.3 mm long, 1.1 mm wide; metathorax 1.0 mm long, 1.1 mm wide; legs incompletely preserved; abdomen with 9 well preserved segments; a pair of cerci visible, segmented.</p> <p> <b>Right forewing</b>: 6.7 mm long, 2.6 mm wide; ScP strong, ending on anterior margin, slightly beyond the wing midlength; area between anterior wing margin and ScP with several strong crossveins; RA simple, distinctly bent opposite the end of ScP, reaching wing apex; RP originates opposite one third of the wing length, fused with MA 0.2 mm long distal to its origin; RP + MA 0.3 mm long; RP and anterior branch of MA probably fused for a point, then separated immediately; RP with three (2, 1) or four distal branches (3, 1); M forked into MA and MP opposite the origin of RP; MA with two branches or simple; MP simple; CuA forked 0.3 mm distal to arculus; CuA1 forked 2.1 mm distal to its origin, with two branches; CuA2 forked 0.9 mm distal to its origin, with two branches; CuP simple, straight, concave; AA vein strong. <b>Left forewing:</b> 6.7 mm long, 2.6 mm wide; ScP strong, ending on anterior margin, slightly beyond the wing mid-length; area between anterior wing margin and ScP with several strong crossveins; RA simple, distinctly bent opposite the end of ScP, reaching wing apex; RP originates opposite one third of the wing length, fused with MA 0.2 mm long distal to its origin; RP + MA 0.1 mm long; RP with four distal branches (2, 2); M forked into MA and MP slightly before the origin of RP; MA and MP simple; CuA forked 0.4 mm distal to arculus; CuA1 forked 1.0 mm distal to its origin, with three branches (2, 1); CuA2 simple; CuP simple, straight, concave; AA vein strong and straight.</p> <p> <b>Right hind wing:</b> poorly preserved, about 5.9 mm long, 2.4 mm wide; R divided into RA and RP nearly in wing base; RP fused with MA for 0.5 mm; M forked opposite the origin of RP.</p>Published as part of <i>Cui, Yingying & Ren, Dong, 2013, Neotype designation for Sinonamuropteris ningxiaensis Peng, Hong et Zhang, 2005 (Grylloblattida: Sinonamuropteridae), pp. 596-599 in Zootaxa 3694 (6)</i> on pages 596-598, DOI: 10.11646/zootaxa.3694.6.7, <a href="http://zenodo.org/record/10098988">http://zenodo.org/record/10098988</a>
Impact of new evaluated nuclear data libraries on core characteristics of innovative reactor designs
No full textThe impact of new evaluated nuclear data libraries (ENDF/B, JENDL and JEFF) on core characteristics of thermal and fast spectra innovative reactor designs was investigated. The innovative reactor design with thermal neutron spectrum is represented by small-sized, long-life CANDLE (Constant Axial shape of Neutron flux, nuclide densities and power shape During Life of Energy producing reactors) HTGRs (High Temperature Gas-cooled Reactors) with uranium and thorium fuel cycles, while the one with the fast neutron spectrum is represented by compact, sodium-cooled BBRs (Breed-and-Burn Reactors). The CANDLE HTGR core characteristics (i.e. kinf, keff, discharge burnup, burning region moving velocity, core life time and axial power peaking factor) were evaluated by a dedicated deterministic neutronics and depletion code based on few-group neutron diffusion theory in 2-D RZ geometry, while the required microscopic cross sections were prepared by using SRAC2006 with JENDL-4.0, ENDF/B-VI and JEFF-3.1 based new SRAC2006 libraries. The BBR core characteristics were evaluated using a continuous energy Monte Carlo neutron transport code, SERPENT, with JENDL-4.0, ENDF/B-VILO, ENDF/B-VII.1 and JEFF-3.1.1 nuclear data based new libraries. The impact of new evaluated nuclear data libraries for innovative CANDLE HTGR core characteristics was found significantly larger for thorium fuel cycle than the one for uranium fuel cycle, especially in the discharge burnup, burning region moving velocity which affected the core life time significantly. The findings indicated the needs of more accurate nuclear data libraries for nuclides involved in thorium fuel cycle. The impact of new evaluated nuclear data libraries for innovative BBR core characteristics was found in a slightly large variation for keff evolution during burnup which in turn affected the estimated core life time. However, a good agreement within the statistical error on the integral kinetic parameters, Doppler reactivity coefficients, coolant density reactivity coefficients, axial and radial expansion reactivity coefficients, power density distributions can be observed among the libraries. In addition, the buildup of fission products and minor actinides were also similar
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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