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(2(3):1-31)稻系統發生的分化－Ⅰ. 形質不同品種間之變異
No full text1. The aim of the present study is to gain informations as to whether definite kinds of genic constitutions would be preponderant or not among the varieties of rice plant and, how the varieties are to be divided into groups. More than one hundred and twenty varieties picked out nearly randomly from numerous varieties of various districts of Eactern Asia were observed with respect to diverse characters, and on the ground of those results, discontinuity of varietal variation, intervarietal correlations and tendencies in character combination were investigated.
2. Besides phenol reaction which was found to he determined by a single genic change, the following several characters in which a number of genes would be concerned. i. e. pottasium chlorate resistance, low temperature resistance, drought resistance and the length of awn, showed discontinuous sppearances of varietal, variation by which the varieties were to be divided into two groups. Varietal variations of the days of germination, and the weight of grain shedding seemed somewhat to b disrontinuous. The degree of destruction of endosperm by caustic potash (alkali-test), the days of endosperm maturation, the length-width ratio of unhulled rice, the length of first and second internodos grown in a dark place, showed continuous appearance of varietal variation.
3. With regard to a greater part of these characters, except the length-width ratio of unhulled rice and length of the first and second internodes, the varieties positive in phenol reaction and the negative varieties showed characteristics contrary to each other. At the same time these characters were found to be correlated inter Se.
4. With regard to each of the five characters which showed discontinuous appearance of varietal variation, i.e. phenol reaction, pottasium chlorate resistance, low temperature resistance, drought resistance, and the length of awn, the used varieties were divided into two groups, plus and minus; and thus the characteristics of a variety was represented by a combination of five signs. Then, the frequency of varieties possessing respective kinds of character combination was investigated. Consequently, two definite kinds of character combination, namely, phenol reaction: plus, pottasium chlorate resistance and low temperature resistance: minus (weak), drought resistance: plus (hard), and awn: minus (awnless), and a character combination contrary in each to the above, were found to be preponderant among the used varieties.
5. Varieties possessing the former character combination phenol reaction: plus, etc) were found mostly among the varieties of Asiatic Continent, viz. China, Indo-china and India, while varieties possessing the latter one were found to distribute mainly over the islands of Western Pacific, viz. Sunda Islands, Celebes, Philippine, Formosa (Horai and the native varieties of mountain part) and Japan, in addition to northern China.
6. It was considered, on the ground of various facts as mentioned above, that the varieties of rice plant were to be divided into two variety-groups which were different in various characters, reserving some indistinct varieties which would belong to neither of them. These two variety-groups were named, with a view to manifest the tendency of geographical distribution, as ”Continental” and ”Insular” variety-groups.
7. Within Insular group, intervarietal correlations were found among such characters as follows: the degree of destruction of endosperm by caustic potash, the length-width ratio of unhulled rice, the length of first internode, and others. Accordingly, varieties possessing definite kinds of character combination were found to be preponderant. It was considered, therefore, that Insular variety-group could be divided into two minor groups, though the distinction being not so evident. These minor groups were named as ”Tropical insular” and ”Temperate Insular” variety-groups according to the tendency of geographical distribution
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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