1,721,049 research outputs found
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
Monitoring Angiostrongylus vasorum natural infection in dogs under parasitic treatment.
No full textAngiostrongylus vasorum is a nematode which causes a potentially fatal chronic parasitic pneumonia in dogs. A. vasorum infection is considered endemic in various parts of Europe (Koch and Willesen, 2009) and in Italy it is recently assumig increasing importance. Aim- To monitor A. vasorum natural infection in dogs under treatment by direct microscopy and modified Baermann technique on faecal samples. Materials and methods- Owned dogs presented at the Clinical Unit of the Veterinary Faculty of Bari, Italy, and positive to A. vasorum infection were included in the study. The diagnosis was reached by means of L1 detection on direct faecal smear and/or using the modified Baermann technique. Faecal samples positive to nematodes mobile larvae were sent to the Parasitology Unit for morphological identification. The animals were treated and clinically and parasitologically monitored. Asymptomatic dogs were treated with an imidacloprid/moxidectin spot-on formulation (Im/Mox) at T0, T+15,T+30. Symptomatic dogs were treated with fenbendazole 25 mg/kg/ bid/os for 21 days. Treatment was weekly monitored using Baermann test on three days faecal pool both in symptomatic and asymptomatic animals for one month, than once a month till possible. When infection persisted a second-line treatment was considered. In symptomatic animals clinical examination was performed once a week till clinical recovery than twice a month, while asymptomatic animals were revaluated only after the third spot-on treatment. Results- Ten dogs were enrolled in the study. Signalment, clinical signs at presentation, therapy, clinical remission time and results of faecal monitoring are reported in table. Briefly 5 dogs were treated with fenbendazole and the others with Im/Mox. In three dogs a second-line treatment was needed and fenbendazole 25 mg/kg/die for 21 days associated to Im/Mox was used. In these three dogs a long term monitoring was possible. Conclusions- Given its proven efficacy (Chapman et al., 2004) fenbendazole has been used in symptomatic patients, whereas Im/Mox, more recently proposed (Willesen et al., 2007) was used for asymptomatic dogs. All dogs treated with fenbendazole (dog 6-10) resulted negative at Baermann after 1-2 weeks of treatment but a long term monitoring was available only in two dogs (dog 6,7) showing negative results. A highly variable response was registered in dogs treated with Im/Mox (dog 1-5). Two dogs (dog 1 and 4) reached negative results 1-2 weeks after first spot-on administration and persisted negative for 16 and 20 weeks respectively. It is reported that larval excretion may continue for over 3 weeks, even if anthelmintic treatment was successful (Schnyder et al., 2010). Differently one case (dog 5) slowly reached negative results (8 weeks after the first spot-on) but it reverse newly positive two times during monitoring. Other two cases (dog 2 and 3) resulted persistently positive for 12 weeks. The last three dogs were treated with the second-line treatment. Cases 2 and 3 achieved negative results so slowly (8 and 20 weeks after second-line treatment) to make difficult a direct association with treatment efficacy, anyway they persisted negative in a long term follow up. Case 5 showed negative results 4 weeks after second-line treatment but unexpectedly it reverse positive a second time. Reinfection or infection not controlled? The question is open, we can only make assumptions. It is already known that anthelmintic treatments may not completely eliminate adult worms but be able to sterilise them leading to a reduced pathogenicity of A. vasorum infection (in: Schnyder et al., 2010). In experimental studies (Schnyder et al., 2010) on dogs treated with Im/Mox spot-on and untreated, eggs and larvae were only present in untreated dogs. The highly variable response registered in this study suggests that in natural conditions several factors could affect the response to treatment probably associated to the host and/or to the parasite. Moreover to monitor the response to treatment serial tests are needed; the limits of Baermann test are known and a single negative result does not mean control of infection
Eimeria spp. in calves from dairy farms in the provence of Parma
No full textCoccidiosis in calves is caused by infection with the intestinal apicomplexan protozoo Eimeria spp. Most
authors agree that, of the more than a dozen species, only Eimeria bovis and Eimeria zuernii are likely
responsible for severe clinical disease characterized by haemorrhagic diarrhoea and occasionally a fatal outcome. To a lesser extent, Eimeria alabamensis
can also cause clinical disease. However, due to the damage inflicted on the intestinal tissue, the digestive
process and overall homeostasis can become severely affected, even with absence of clinical disease with
adverse effects on animal welfare and performance. The consequent economic losses for the cattle industry
are thus potentially substantial
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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