1,720,974 research outputs found
Platelet Stearic Acid in different population groups: biochemical and functional hypothesis
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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
Platelet fatty acids: a model for the classification of animal world?, Part II
No full textDepression may be linked to changes of the fatty acid profile in many biological districts such as platelets, plasma phospholipids, rat brain and red blood cells.
The platelet is one of the most extensively researched biological markers in psychiatry. In an animal model of depression, the high level of arachidonic acid, found in the brain, in platelets and in other biological material indicates a possible relationship between platelets and brain.
For this purpose we investigated platelet fatty acid composition in humans (vein and artery) and in pigs (vein and brain).
The findings are consistent with the hypothesis, in the case of Arachidonic Acid, of a specific link between the two districts (platelets and brain) and of the existence of particular conditions which can cause a dangerous accumulation of Arachidonic Acid within the brain
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
Platelet and Brain Fatty Acids: a model for the classification of the animal world? Part I
No full textRecently Cocchi-Tonello have investigated the platelet fatty acid profile in normal and depressive subjects.
The data allowed us to create a particular Artificial Neural Net¬work, the so-called Self Organizing Map (SOM).
The SOM distributes all the subjects investigated over a plane, also according to the degree of saturation/unsaturation of the fatty acids identified as markers of the depressive pathology (Palmitic Acid, Linoleic Acid, Arachidonic Acid).
In this way it is possible to distribute all animals and humans over the map according to the percentage of the fatty acids (Pal¬mitic Acid, Linoleic Acid, Arachidonic Acid)characteristic of each of the animal species investigated.
Because of the specific characteristics of the SOM and the af¬finity of the platelet with the neuron, we considered that the SOM could also be used to classify the brains of different ani¬mal species. Because of the low level of Linoleic Acid in the brain, all the brains were classified in the same position on the map, very close to the area of depressive subjects.
Is the brain genetically organized for the risk of depression? In this sense, is the brain, influenced by the modulation of the fatty acids or by the gene expression of the fatty acids? We do not yet know the final answers to these questions, but it is significant that the fatty acids which make the difference be¬tween the normal condition and the depressive condition shape the brain in the way we found. In any case, we know that Major Depression is characterized by a high level of Arachidonic Acid, both in platelets and in the brain
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
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