1,720,965 research outputs found
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
Social transmission in sheep training on virtual fence
No full textVirtual fences have been developed over the last 20 years with focusing enabling an easy and flexible pasture management for goats, sheep, and cattle. The focus on research have been on the animal’s ability to learn to associate an audio cue with a future electrical stimulus and their ability to learn a correct avoiding behaviour in response to the audio cue. No research has focused on what the presence of already trained sheep have on the learning curve of naïve sheep. Thus, the aim of this study was to examine if sheep have a faster learning curve when trained together with sheep that already know how to react to the sound cues in comparison to a group of naïve sheep.Fifteen, one year old sheep, where divided into two groups of five (group 1) and ten (group 2). Additional five sheep of the same age, that had been trained on virtual fence two months before, was included in group 1. One day 1 the sheep was moved to two rectangular pastures with 40 meters from the back of the fence line to the virtual fence line. On day 3 the virtual fence line was move additional 30 meter to simulate strip pasture. Number of audio and electrical stimuli was collected by the system.A success rate was calculated as ((#audio cues – #electrical stimuli)/ #audio cues) as a measure of how well the animal have learnt to react correctly to the system. Data was analyses using a mixed model in SAS, with #audio cues, #electrical stimuli and success rate as dependent variables and group, day, and their interaction as fixed effects. Animal was defined as repeated measure.Day affected average number of sound cues, with an increasing number of sound cues from day 1 to day 5 (2.95 vs 8.25 ± 1.2, P<0.05). Furthermore, Group 1 had a higher success rate than Group 2 (0.94 ± 0.05 vs 0.75 ± 0.04, P<0.05). No other significant effects were found.The results conclude that sheep learn to use a virtual fence and they get better over time. Additionally, it can be concluded that social transmission occur when sheep are being trained to use a virtual fence together with already trained sheep.</p
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
How Does the Provision of Shade during Grazing Affect Heat Stress Experienced by Dairy Cows in Sweden?
No full textHeat stress in dairy cows can cause an increase in body temperature and respiration rate, and a decreased feed intake leading to reduced production. Dairy cows are better at handling heat when they have access to shade. Therefore, this study aimed to determine the effects of providing shade to high-yielding dairy cattle during the summer in the Swedish climate. Twenty high-yielding Swedish Red dairy cows, held on pasture, were divided into two groups, one with access to shade (S) and one without (NS). Milk production was recorded daily and shade temperature and relative humidity were recorded at 10 min intervals at pasture. A major effect of heat stress was found in cows in early lactation in the NS group. In this group, a high mean temperature two days before and a high THI two days before affected the milk production negatively (p < 0.001), which was the same for the maximum temperature and maximum THI measured on the same day (p < 0.001). Increases in the mean temperature and THI two days before also affected milk production negatively (p < 0.05) for cows in early lactation in the S group, though to a lesser extent. This study suggests that dairy cows in early lactation benefit from access to shade during summer.This research was funded by the Swedish Board of Agriculture from a specific national call on improving animal welfare for production animals, grant number 31-4311/09.</p
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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