1,720,963 research outputs found
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
(38(1):72-79)Studies on the Break-down of Resistance in Rice Cultivar Tainung 70 to Rice Blast
No full text水稻臺農70號於民國74年第一期作命名，而自同年第二期作正式推廣。命名當時具有高產、良質、抗葉稻熱病，對穗稻熱病屬於中抗的優良品種，但於民國76年第一期作，即自正式推廣後僅四期作，即失去抗性，發生嚴重的穗稻熱病。本研究主要為探討本省稻熱病菌生理小種對該品種致病性之變化情形。供試稻熱病菌計78 個菌株（包括73年度採集的27個菌株及76年度採得51個菌株），並行人工接種於16判別品種及臺農70號，測定其生理型及對臺農70號之致病性，結果可類別10種生理小種，其中僅有race P─12及P─63兩種生理小種對臺農70號具有致病（S）反應。自73年度所採集的27個菌株中有僅3個菌株（1菌株為P─12，2菌株為P─63，佔11％），76年所得51個菌株中，有18個菌株（12菌株為P─12，6個菌株為P─63，佔35％）對臺農70號顯示感病（S）反應。此兩種生理小種，原來在本省已有存在，但其密度極低，自臺農70號急速大面積種植後，才增加其密度比例，致使該品種的罹病化。本省的栽培稻品種，有稉稻（japonica）及秈稻（indica）混合種值於田間，因此稻熱病菌生理小種之變化頗複雜。
Rice cultivar Tainung 70 was named in the first crop season and released in the second crop season of 1985, due to its high yielding, high quality, resistance to leaf blast, and moderate resistance to panicle blast. After 2 years (4 crop seasons), the resistance broke down and servere epidemics of panicle blast occurred in the first crop of 1987. Experiments were conducted to explore the pathogenic variation of races of Pyricularia oryzae in the rice cultivars to understand the reason of break down. Seventy-eight isolates (27 collected in 1984, 51 collected in 1987) of P. oryzae were artifically inoculated to the cv. Tainung 70 and 16 differential varieties for race studies. The reaction of the 78 isolates were classified into 10 physiologic races. Among the 10 races, there were 2 races, P-12 and P-63, pathogenic to Tainung 70. In terms of isolate and percentage, 3 isolates (1 belonged to race P-12, 2 belonged to race P-63) out of the 27 isolates or 11% collected in 1984 and 18 isolates (12 belonged to race P-12, 6 belonged to race P-63) out of the 51 isolates or 35% collected in 1987 were pathogenic to Tainung
70. These 2 races, P-12 and P-63, have already existed in nature but their populations were very low before the release of Tainung 70. When the acreage of Tainung 70 increased the population of the 2 races also increased with the time and then, the cultivar Tainung 70 became susceptible
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
(37(1):76-85)Studies on the ecology of the powdery mildew of beans
No full text自民國73年9月到75年6月止，於本所農場設立豆類白粉病觀測圃，每月播種大豆、綠豆及紅豆各一次，做白粉病的發病度調查。結果顯示各播種期中，綠豆最早發病，且最為感病；紅豆次之；大豆於本試驗期間均未見發病。綠豆及紅豆白粉病之病勢，均自秋末（10月底）開始急速進展，冬季期間（l1～次年1月）罹病率最為嚴重，春末（4～5月）病勢開始下降，夏季期間發病輕微。白粉病圃空氣中分生胞子之密度，日間比夜間多，尤其午間達最高峯；田間空氣中之分生胞子量與白粉病罹病程度呈正相關。除75年春北港地區的綠豆白粉病較嚴重外，73、74年冬季的屏東紅豆產區，和74年春的嘉義綠豆產區所調查的白粉病害，發病都較輕微。綜合各氣象資料做分析，可瞭解各氣象因子對病害之發生，實具有直接或間接的影響。故為減少白粉病的發生，當秋作時，宜較早播種，而春作則採較晚播種為佳。
The powdery mildews of beans were surveyed in the monthly sown bean plants at TARI from September 1984 to June 1986. No diseased plant was found in soybean while mungbean and adzuki bean were much more susceptible. Generally, the occurrence of this disease in mungbean was earlier and more serious than in adzuki bean. Mungbean and adzuki bean cultured in Autumn showed higher degree of severity than in Spring, especially in adzuki bean, and there was not much susceptibility difference in any plant stage. Most spores were disseminated during the day, especially at noon, while few were released during the night. It showed that there was not higher disease incidence while investigating in Ping-tung area (Autumn, 1984; Autumn, 1985) and in Chia-yih area ( Spring, 1985), but the disease incidence was higher in Pei-kang area (Spring, 1986). From our climatic data, we believed that the distribution and severity of powdery mildew were directly and indirectly influenced by the environmental factors. Therefore, to lessen the occurrence of powdery mildew, it might be better to sow crops in early Autumn or late Spring
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
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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