1,721,065 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
Prädiktoren des Langzeitüberlebens nach chirurgischer Resektion des hepatozellulären Karzinoms
No full textkoamabayili/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
Advantages of a training course for surgical planning in virtual reality for oral and maxillofacial surgery: crossover study
No full textSelective internal radiation therapy of breast cancer liver metastases : survival, response and safety in a bicentric retrospective analysis
No full textTitle: Selective internal radiation therapy of breast cancer liver metastases: Survival, response and safety in a bicentric retrospective analysis Doctoral candidate: Jonas Constantin Ihm Abstract AIM: Breast cancer (BC) is one of the most common causes of cancer in women. A metastatic spread within the liver is a frequent complication of proceeded BC. Previous studies assessed selective internal radiation therapy (SIRT) as successful in the treatment of those metastases. This study evaluates overall survival, response and safety of SIRT administered to patients suffering from BCLM. It shall identify suitable patients for this kind of therapy. METHODS: 67 female patients received 112 SIRT-interventions with 90yttrium at the two University Hospitals of Aachen and Bonn (Aug 2007 till Mar 2018). We retrospectively evaluated baseline characteristics and follow-up-data. Response was assessed by MRT-imaging and tumour marker levels. Toxicity was examined by means of laboratory findings and clinical investigations. Primary endpoint of this study was overall survival (OS), for which survey Cox regression analysis was performed. RESULTS: The median age was 55.85 y (IQR 17.54 y). Best response was CR in 5.5%, PR in 41.8%, SD in 38.2%, and PD in 14.5%. The TTHP of the firstly treated part appears as median of 2.86 mo (IQR 5.31 mo), the median TTEP is 1.64 mo (IQR 3.94 mo). 33.3% of the patients developed a laboratory or clinical SAE after first SIRT. The median OS amounts to 7.10 mo (IQR 12.45 mo). After multivariate regression analysis of pooled imputed datasets ECOG status, presence of ascites at baseline, unilobar vs bilobar treatment, and baseline ALT level kept significant predictors of OS.CONCLUSION: This study confirms SIRT as an effective treatment option in BCLM, especially in view of response and time to progression. We identified many predictors which can help to identify suitable patients for therapy. Tumour markers and DW-MRI can support the management of therapy during follow-up
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