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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
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
Endocrine regulation of adipose tissue thermogenesis in the fetal and neonatal sheep
No full textLeptin is produced primarily by white adipose tissue but also by brown adipose tissue (BAT) and the placenta. It has a major physiological role in the control of energy balance. BAT is critically important for the initiation of non-shivering thermogenesis in precocial newborns through the uncoupling protein, UCP1 unique to BAT. This is particularly important in neonatal lambs and infants in which levels of UCP1 peak at birth concomitant with a peak in plasma leptin and a surge in Cortisol. Other mitochondrial proteins may contribute to this effect e.g. VDAC which is located in the outer mitochondrial membrane.
The aim of this thesis was to:
1. investigate the role of the late gestation Cortisol surge on BAT development
2. investigate the effect of route of delivery on subsequent neonatal plasma leptin concentrations
3. assess the effect of leptin administration to neonatal lambs on thermoregulation
Late gestation fetuses were infused with Cortisol or saline or underwent adrenalectomy or sham operation. BAT was sampled at 129 and 144 days of gestation, respectively. UCPl abundance was significantly increased in the animals receiving Cortisol treatment compared to controls and was significantly reduced in adrenalectomised animals.
Plasma leptin was analysed from lambs delivered vaginally or near term by caesarean section (CS). Cord plasma leptin decreased significantly after birth, an adaptation that was delayed by CS delivery. Acute and chronic administration of leptin to neonatal lambs improved thermoregulation by preventing a decline in body temperature. Chronic leptin treatment over 7 days (lOOp-g daily) promoted the loss of UCP1 mRNA and protein, but had no deleterious effects on body temperature.
Polyclonal antibodies were developed against mitchondrial voltage-dependent anion channel (VDAC). The postnatal ontogeny of VDAC was found to be similar to that of UCP1 and cytochrome c, with abundance peaking around one day of age. VDAC was found in high abundance in organs with high metabolic requirements such as heart, muscle and BAT. These results suggest that VDAC is involved in ensuring BAT maintains a maximal rate of thermogenesis after birth.
In conclusion, I have shown for the first time that leptin has an important role in thermogenesis during the transition from fetal to neonatal life. This is attenuated in CS animals, possibly linked to a reduced sympathetic nervous system activity. The rapid loss of UCP1 mRNA, which occurs within the first few days of life, appears to be modulated by leptin, possibly stimulating the development of white adipose tissue and generation of body heat through mechanisms other than nonshivering thermogenesis in BAT. VDAC may be important during this period in ensuring adequate substrate delivery to BAT. Intact adrenal glands are also necessary for the increase in UCP1 abundance during late gestation, an effect mediated in part by Cortisol.
NB. This ethesis has been created by scanning the typescript original and may contain inaccuracies. In case of difficulty, please refer to the original text
Endocrine regulation of adipose tissue thermogenesis in the fetal and neonatal sheep
Get PDFAvailable from British Library Document Supply Centre- DSC:DXN054060 / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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