1,721,014 research outputs found
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
Bacterial stalk rot of sunflower in Taiwan: varietal resistance and agrochemical screening
No full text民國91 年6 月，在苗栗縣大湖地區所種植之向日葵發生植株葉片乾枯萎凋
的徵狀，但莖仍直立於田間，切開莖部，其內部已成中空且具水浸狀腐爛，若發
生於植株莖苗期被害，嚴重者倒伏死亡。92 年夏天同樣情形再度發生。經柯霍氏
法則確認該病原為細菌。經生理生化，Biolog 鑑定及專一性引子進行PCR 分析
等測定，確認該病原菌包括Erwinia chrysanthemi (Ech) 及E. carotovora pv.
carotovora (Ecc)。該病原菌主要造成向日葵植株軸心中空及腐爛，進而引起植株
萎凋枯死，因此稱為向日葵細菌性軸腐病（stalk rot）。由Ecc 及Ech 引起之向日
葵細菌性軸腐病為台灣向日葵首次記錄。品種抗性測定發現供試九種向日葵品種
中以東北八重最為感病，月光及光輝雖感病但抗性較強。軸腐病菌對馬鈴薯塊
莖、大白菜梗、胡蘿蔔塊根均具強致腐能力。測試市售11 種藥劑在一般使用濃
度下以濾紙圓盤法測試對軸腐病菌菌株生長之抑制效果，顯示除甲基鋅乃浦對該
病菌之生長無抑制作用外，其餘 10 種包括鏈黴素、四環黴素、鏈四環黴素、嘉
賜黴素、多保鏈黴素、氫氧化銅、鹼性氯氧化銅、嘉賜銅、鋅錳乃浦及鋅錳滅達
樂等藥劑均能抑制其生長，且以四環黴素藥劑之效果最佳。
Severe stalk rot of sunflower was first found in Tahu, Miaoli County in 2002.
The disease mainly appeared on the stem and caused water-soaked symptoms. In
some severe cases, the stem pith disintegrated and showed hollow stem symptoms.
The pathogens were identified as Erwinia chrysanthemum and E. carotovora subsp.
carotovora based on physiological and chemical tests, Biolog identification, and PCR
analysis. This is the first record of the disease occurring in Taiwan. Resistance
screening indicated that “Tohokuhae” was the most sensitive cultivar and “Moon
bright” and “Sunbright” showed better resistance when inoculated with Ech. Among
11 bactericides screened, tetracycline proved to be the most effective
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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