1,720,974 research outputs found
STUDIES ON THE COMPOUND EYES OF LEPIDOPTERA : 2. On the Morphology and Function of the Compound Eyes of Hesperiidae
Full text link1. The compound eye of Hesperiidae was investigated from morphological 2nd functional point of view. 2. It seems to belong to the superposition eye but is modified into a special type of the superposition eye as an apposition type on the image formation. 3. The iris pigment cell and the secondary pigment cell are united forming a sheath of the cone and immobile under the dark or light environment. 4. The proximal cone end is protruded from the sheath about a third of it being sharply painted. 5. Guanin granuls are distributed on the surface of the cone in the vitrellae (matrix cell). This is a new case of guanin appearance in an animal tissue. 6. Guanin in the cone partakes the reflective function of rays as an iris pigment which lost its own function being deeply coloured. 7. Not all of the skippers have this reflective pigment but some have yellowish granules replacing the guanin function. This pigment will be xanthophore. 8. The retinula is transparent and elongated containing colourless nucleus proximally on the upper part of the tapetum. 9. The tapetum is hexagonally walled With numerous tracheoles which reflect the light. 10. The basal trachea is situated on the upper side of the basement membrane which is fenestrated for the passage of the nerve bundle from ommatidia. The occupation for the trachea is reversed to the case of the other insects. 11. The inner border of periopticon is pigmented deeply but lesser in the middle portion. 12. The image is formed at first in the cone reversely and at second erected in the middle of the retinula. This image is projected to the surface of the rhabdome in the tapetum whose diameter is just the same of the iris cell opening. 13. No superposition of image is occurs on a single rhabdome from numerous facets. 14. The eye of Hesperiidae is a apposition eye functionally though the structure is allied to the superposition type. So it may be called pseudosuperposition eye. 15. From the basis mentioned above the Hesperiidae had to be classified juto a special group of Lepidoptera. separating from butterflies and moths
STUDIES ON THE COMPOUND EYES OF LEPIDOPTERA : 1. ON THE COMPOUND EYES OF BUTTERFLIES, ESPECIALLY ON THE PSEUDOPUPIL AND ITS MEANING TO THE PHYLOGENY OF SPECIES
Full text linkArticleJournal of the Faculty of Textiles and Sericulture, Shinshu University. Series A, Biology 1: 1-49(1951)departmental bulletin pape
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
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
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
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