1,721,270 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
QL-008. An exploration of associations between health related quality of life and medulloblastoma molecular subgroup status in survivors from the SIOP UKCCSG PNET3 trial
No full textOBJECTIVES: To explore the possibility of combining retrospective biological and quality of survival (QoS) data, to investigate whether health-related quality of life (HRQoL) may be related to the underlying biology of medulloblastoma. METHODS: Using available data from our previous studies of SIOP UKCCSG PNET3 survivors whose tumours had been assigned to disease molecular subgroup (SHH, WNT and non-SHH/WNT (Group 3 and Group 4) tumours) using DNA methylation and immuno-histochemical methods, and for whom HRQoL data were also available, we conducted univariate analyses to assess any differences in child- and parent-reported health status (HUI), behavioural functioning (SDQ), and HRQoL (PedsQL) between subgroups. This was followed by a three-step hierarchical forward multiple regression analysis; tumour subgroup was entered at step one followed by gender, age at diagnosis and interval from diagnosis (step two) and treatment and cerebellar mutism (step three) as predictors. Predictors were retained in the model if p < 0.1. RESULTS: There was a significant overall inter-group difference in parent-reported PedsQL (p = 0.018), due to significantly better PedsQL scores in the SHH group (median = 95.3) compared with the WNT group (median = 67.1, p = 0.015) and the non-SHH/WNT group (median = 74.0, p = 0.015). SHH trended to better functioning in all other indices used. At each step in the regression modelling, SHH remained the only significant predictor of parent-reported HRQoL, even after controlling for factors previously associated with worse HRQoL outcomes (treatment and cerebellar mutism) in the final model (B = 17.1, R2 = 0.25, p = 0.043). CONCLUSION: These initial investigations indicate combined analyses of biological and QoS data could provide new insights on HRQoL outcome, and should be incorporated into the planning of expanded studies of medulloblastoma survivors, aimed at fully establishing any basis to inform the future management of patients according to their molecular subgroup status
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
- …
