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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
Catecholamine secretion by isolated bovine adrenal medullary cells : effects of agents which influence ACh and GABA receptors
Get PDFDEVELOPMENT OF TRANSGENIC KENAF(Hibiscus cannithinus L.) THROUGH A GROBA CTERIUM VECTOR
Get PDFA Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE IN GENETICS AND PLANT BREEDING
SEMESTER: Dec’ 2009A significant research work about plant regeneration and Agrohacterium-mediated
genetic transformation was realized for a Kenaf (Hibiscus cannabinus) variety (HC-2)
and an accession of Kenaf (Ace-1665) during the period from July, 2008 to October,
2009 in the Genetic Engineering Laboratory of Genetic Resources and Seed Division,
Bangladesh Jute Research Institute (BJRI). Dhalca. The genetic transformation of two
gene constructs PGly-1 and PsCIPK (that carry p131121 of 14 K Da plasmid with figlucuronidase
p35SGUSINT and plant selectable marker gene nptll) confer both salt and
thought tolerance to Kenaf variety HC-2 and Acc-1665 have been undertaken. A
cotyledon (with attached petioles) was used as explants for plant regeneration. GUS
assay was performed after 30 days of co-cultivation of infected cotyledons. Cotyledons
of the both variety and accession (HC-2 and Ace-1665) were cultured on MS medium
supplemented with different concentrations of BAP (0, 1, 2, 3, 4, and 5 mg/I) and a
constant IAA (0.5mg/I) concentration to induce callus and shoot regeneration. The range
of callus induction was found to be 24% to 91 % and shoot regeneration was 16.33% to
91 .33%.The highest callus induction (91%) was found in both HC-2 and Acc-1665
varieties when cultured on MS medium supplemented with 3.0 mg/I BAP and 0.5 mg/I
IAA and the highest shoot regeneration (91 .33%) was found in HC-2 variety. GUS
histochemical assay was performed for the co-cultivated explants of Kenaf varieties
(leaves) regenerated on kanamycin thr the detection of transgenic plants. The result of
GUS assay varied according to varieties infected with different strains. Between the
varietal response to GUS assay. HC-2 showed 70% and 90 % GUS positive depending
upon PGIy-1 and PsCIPK infection. Whereas, Acc-1665 showed 65% and 75% positive
for GUS assay depending upon GIy-1 and CIPK infection consecutively. Regeneration of
plantlets (putative transformed plantlets) in kanamycin containing medium was found to
be the highest for the variety HC-2 (84%) followed by Acc-1665 (79%). In vitro
evaluation of explants under various salt concentrations was carried out to detect the
tolerance level of transformed plants against different salt concentrations. Transformed
plants were able to survive on 125 mM salt concentration while the controlled plants
died out at NaCI salt concentration of 75mM. Both the variety and accession survived on
(70%) up to 75 mM salt concentrations. However, in case of 125 mM salt concentrations,
the survival was 20%. It signals the possibility of the salt tolerant variety development
using recombinant DNA technology for cultivation in the saline belt of Bangladesh
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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