1,721,691 research outputs found
The Marine Macroalgae of Lu Tao(Green Island), Taiwan
No full text[[abstract]]The species composition, distribution, seasonality of the marine macroalgae of Lu Tao, Taiwan were studied. A total of 146 species were recorded including 2 Cyanobacteria, 51 Chlorophyta, 23 Phaeophyceae and 70 Rhodophyta. Among them, Laurencia cartilaginea and L. intricata which are newly recorded for Taiwan. The marine macroalgae of Lu Tao are compared with reported floras of Taiwan and its other associated islands.[[abstract]]綠島為一火山島，位於臺灣的東南海域中，距臺灣東部海岸最近距離約33公里。本研究於民國八十年一月、四月、六月、九月及十一月，以浮潛及水肺潛水的方式調查綠島海藻種類的組成、分佈及季節性變化，計有146種海藻，包括藍藻2種，綠藻51種，褐藻23種，紅藻70種。其中Laurencia cartilaginea 和 L. intricata為台灣新紀錄種。文中亦將綠島的大型海藻與台灣及其附近離島的大型海藻做一比較
Rb-Sr Isotopic Study of Andesites from Lu-Tao, Lan-Hsu and Hsiao-Lan-Hsu, Eruption Ages and Isotopic Heterogeneity
No full text[[abstract]]Rb-Sr radiometric ages and initial 87Sr/86Sr ratios have been measured for some volcanic samples erupted near the onset time of collision between the Luzon Arc and the Eurasian Piate at the islets of Lu-Tao, Lan-Hsu, and Hsiao-Lan-Hsu. Four Lu-Tao horn-blende-biotite andesites have ages 9.4, 2.9, 2.3, and 1.1 Ma based on data for coexisting biotite-plagioclase pairs. Two similar samples from Hsiao-Lan-Hsu show younger ages of ≦ 1.0 Ma. These ages are consistent with the K-Ar ages (Richard et al., 1986) but significantly expand the duration of dated magmatic activities. However, distinct isotopic heterogeneities observed in some of the coexisting amphibole separates render the oldest age in suspect. The younger ages imply that the magmatic activities lasted at least until two million years after the beginning of the collision, consistent with that inferred previously for the Coastal Range by paleontological and paleomagnetic means. The initial 87Sr/86Sr for the above six rocks range from 0.70478 to 0.70524 while a pyroxene andesite from Lan-Hsu yields a similar value of 0.70472. Such high ratios are unusual among intra-oceanic arcs. If no substantial exchange with seawater has occurred in the genesis of these andesites then the involvement of continental crustal material is implicated. Since these values are much higher than that reported for the Coastal Range in the northern section of the arc (< 0.7035, Shih, 1973), its Sr isotopic composition seems to be heterogeneous. There is no apparent correlation between the initial ratios and the eruption ages. We also describe our procedure for Rb-Sr isotopic analysis and demonstrate its capability.[[fileno]]2010101010004[[department]]物理
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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