1,720,956 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
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
Содержание генов антибиотикорезистентности в водоемах Ростовской области
No full textThe work is devoted to research of antibiotic resistance genes content in the water bodies of the Rostov Region. PCR diagnostics of 22 water samples and 5 bottom sediments samples with subsequent
electrophoretic detection have been carried out. As a result of the conducted research, presence of VIM and OXA-48 genes, as wells as tetracycline-resistance genes in the samples of water and bottom sediments taken from the Severnoye reservoir, the spring on Beregovaya St. in Paramonovsky warehouses, the Kagalnik river, and also near the city embankment of the Don River was revealed.Работа посвящена исследованию содержания генов устойчивости к антибиотикам в водоемах
Ростовской области. Проведена ПЦР-диагностика 22 проб воды и 5 проб донных отложений с последующей электрофоретической детекцией. В результате проведенного исследования было выявлено наличие генов VIM, OXA-48, а также генов устойчивости к тетрациклину в образцах воды и донных отложений, отобранных на Северном водохранилище, в роднике на ул. Береговой на Парамоновских складах, в реке Кагальник, а также в районе городской набережной р. Дон.Publishe
Оценка токсичности тканей пиленгаса при помощи цельноклеточных бактериальных люминесцентных сенсоров
No full textContamination of aquatic organisms with pollutants leads to depletion of genetic resources, both due to a decrease in the number of species, and to degradation of their gene pools caused by accumulation of the changes in genetic parameters. In this regard, ecotoxicological studies are important both in terms of predicting the fish state and in relation to the state and the bioresource potential of the investigated water body. This paper presents the results of ecotoxicological assessment of various tissues of the so-iuy mullet (Planiliza haematocheilus (Temminck & Schlegel, 1845)), living in the Azov Sea , obtained by biotesting based on whole-cell luminescent bacterial sensors (E. coli MG1655 (pAlkA-lux), E. coli MG1655 (pRecA-lux), E. coli MG1655 (pKatG-lux), and E. coli MG1655 (pSoxS-lux)). It has been shown that liver, gills and muscle tissue of so-iuy mullet can serve as analytical samples for monitoring the toxicity of aquatic ecosystems. In the majority of the investigated tissue samples of so-iuy mullet, toxic effects, induced by the presence of DNA-tropic agents and prooxidants, have been found. In has been shown that the gills and liver are much more susceptible to the toxic effects of pollutants than the muscle tissue. The obtained results indicate the negative impact of anthropogenic activities on this fish population and may be useful for assessing the ecotoxicological characteristics of aquatic ecosystems.Загрязнение гидробионтов поллютантами приводит к истощению генетических ресурсов, причем как за счет уменьшения численности видов, так и за счет деградации их генофондов, вызванной накоплением изменений генетических показателей. В связи с этим проведение экотоксикологических исследований важно как в плане прогноза состояния самих рыб, так и в отношении состояния и биоресурсного потенциала исследуемого водоема. В работе представлены результаты экотоксикологической оценки различных тканей пиленгаса (Planiliza haematocheilus (Temminck & Schlegel, 1845)), обитающего в Азовском море, полученные методом биотестирования на основе цельноклеточных люминесцентных бактериальных сенсоров (E. coli MG1655 (pAlkA-lux), E. coli MG1655 (pRecA-lux), E. coli MG1655 (pKatG-lux), E. coli MG1655 (pSoxS-lux)). Показано, что печень, жабры и мышечная ткань пиленгаса могут служить аналитическими пробами для мониторинга токсичности водных экосистем. В большинстве образцов исследованных тканей пиленгаса обнаружены токсичные эффекты, обусловленные присутствием ДНК-тропных и прооксидантных веществ. Показано, что печень и жабры более подвержены токсическому воздействию поллютантов, чем мышечная ткань. Полученные результаты свидетельствуют о негативном влиянии антропогенной деятельности на данную популяцию рыб и могут быть полезны для оценки экотоксикологических характеристик водных экосистем.PublishedReferee
Оценка загрязнения водных экосистем Ростовской области методом биотестирования
No full textThe results of water ecosystems toxicity research of the Rostov Region, performed with the use of
bacterial lux-biosensors, are presented in the work.В работе представлены результаты исследования токсичности водных экосистем Ростовской области с использованием бактериальных lux-биосенсоров.Publishe
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