1,721,048 research outputs found
Figs 1–2. Habitus photographs. 1 in Chrysotus Meigen (Diptera: Dolichopodidae) from Shanxi, China, with descriptions of two new species
No full textFigs 1–2. Habitus photographs. 1. Chrysotus shanxiensis sp. nov., male. 2. Chrysotus thornpenis sp. nov., male. Scale bars = 0.5 mm.Published as part of Liu, Ruo-Si, Wang, Meng-Qing & Yang, Ding, 2015, Chrysotus Meigen (Diptera: Dolichopodidae) from Shanxi, China, with descriptions of two new species, pp. 86-92 in Zoological Systematics 40 (1) on page 88, DOI: 10.11865/zs.20150109, http://zenodo.org/record/717652
Figs 6–8 in Chrysotus Meigen (Diptera: Dolichopodidae) from Shanxi, China, with descriptions of two new species
No full textFigs 6–8. Chrysotus thornpenis sp. nov., male. 6. First flagellomere, lateral view. 7. Genitalia, lateral view. 8. Apex of phallus, ventral view. Scale bars = 0.1 mm.Published as part of Liu, Ruo-Si, Wang, Meng-Qing & Yang, Ding, 2015, Chrysotus Meigen (Diptera: Dolichopodidae) from Shanxi, China, with descriptions of two new species, pp. 86-92 in Zoological Systematics 40 (1) on page 91, DOI: 10.11865/zs.20150109, http://zenodo.org/record/717652
Figs 3–5 in Chrysotus Meigen (Diptera: Dolichopodidae) from Shanxi, China, with descriptions of two new species
No full textFigs 3–5. Chrysotus shanxiensis sp. nov., male. 3. First flagellomere, lateral view. 4. Genitalia, lateral view. 5. Apex of phallus, ventral view. Abbreviations: cer, cercus; epn, epandrium; hyp, hypandrium; lel, lateral epandrial lobe; pg, postgonite; ph, phallus; sur, surstylus. Scale bars = 0.1 mm.Published as part of Liu, Ruo-Si, Wang, Meng-Qing & Yang, Ding, 2015, Chrysotus Meigen (Diptera: Dolichopodidae) from Shanxi, China, with descriptions of two new species, pp. 86-92 in Zoological Systematics 40 (1) on page 90, DOI: 10.11865/zs.20150109, http://zenodo.org/record/717652
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
Ambient seismic noise analysis: Origin of noise source and tomographic inversion for lithospheric velocity structure offshore eastern Taiwan
No full text本文利用周遭噪訊法，分析2007-2009年TAIGER計畫在花東海盆布放的海底地震儀的連續紀錄，配合台灣東岸陸上測站數據，分析台灣東部海域噪訊來源和特性，以及台灣東部及花東海盆的岩石圈構造。周遭噪訊法近期已被用來擷取台灣全島測站間的表面波群速度與相速度頻散曲線，並透過多重尺度小波逆推技術，成功求得高解析度的速度層析成像，並進一步透過非均向性隨深度的變化，推論台灣造山分層耦合的變形機制。台灣本島之外，過去對台灣近海海域的類似研究則較為不足。本研究採用相同方法分析花東海盆，提供更完整的台灣及相鄰海域構造解釋。我們首先探討台灣東部及海域噪訊特性。透過長時間噪訊疊加，比較陸上及海上噪訊能量大小及主要頻段差異，分析台灣周邊噪訊的可能來源。並發現在2008年，颱風經過台灣顯著提高了海陸測站的噪訊。另一方面，反演表面波群速度與相速度頻散曲線，求得花東海盆二維相速度及非均向性變化。結果發現，短週期(4-8秒)表面波相速度變化平緩，非均向性不強，但快軸呈南北走向，與磁力條帶方向一致，應代表海盆發育時的擴張方向，另一方面，較長週期(12-20秒)的相速度則呈現顯著空間變化，反映的是地幔岩石圈的特徵。在海盆中央及北呂宋島弧的相速度偏高，非均向性在海盆中央區域增強，且快軸呈西北-東南走向，恰與板塊聚合方向一致，應與軟流圈地幔流場的影響有關。We apply ambient noise analysis to continuous seismic waveform data recorded by ocean-bottom seismometers (OBS) deployed in the Huatung Basin and adjacent regions off the east coast of Taiwan. Taiwan is a young and active orogenic belt resulting from the oblique subduction and collision between the Eurasian Plate and the Philippine Sea Plate. Sitting on the westernmost edge of the Philippine Sea Plate, the Huatung Basin is directly involved in the subduction-collision processes. The structural characteristics of the basin provide important constraints not only on its own history but the tectonic evolution in this complex region. We first analyze the noise signals by stacking cross-correlation functions from station pairs between OBS stations and between land and OBS stations. We find that, unsurprisingly, the noise power of the offshore OBS stations is larger than that of onshore stations. Further, we integrate the OBS data with selected land station data along the east coast, deriving Rayleigh wave Green’s functions from cross-correlation between all available station pairs. We measure phase velocity dispersion at periods from 4 to 20 sec, and invert for 2-D anisotropic phase velocity maps based on a wavelet-based multi-scale inversion scheme. Our results show that, at periods 12-20 s, significant seismic anisotropy is present in the Huatung Basin close to Taiwan’s southeast coast, with fast direction sub-parallel to the direction of convergence. On the other hand, to the north across the Ryukyu trench, anisotropy becomes weaker and the fast direction appears to rotate clockwise toward NW-SE to N-S directions. These characteristics represent the property of the mantle lithosphere of the Huatung Basin, implying for current influence of asthenospheric flow due to currently the PSP plate motion
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
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