1,720,968 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
Mild parkinsonian signs and psycho-behavioral symptoms in subjects with mild cognitive impairment.
No full textBackground: Mild cognitive impairment (MCI) may be accompanied by extra- pyramidal signs (EPS), which are related to the severity and type of cognitive
impairment. We aimed to elucidate further the relationship between MCI and EPS, analyzing the correlation between the severity of EPS and cognitive functions, and the presence of EPS and neuro-psychiatric features.
Methods: Data were obtained from a longitudinal study of 150 MCI outpatients. Participants underwent a clinical assessment including the Unified Parkinson Disease Rating Scale, the Neuropsychiatric Inventory, the Tinetti Scale, and a standardized neuropsychological battery. Mild EPS could be defined as being present (MCI with mild EPS) using a subscale of UPDRS, based on three specific symptoms: bradykinesia, rigidity and tremor.
Results: The two groups, one with mild EPS (24%) and one without EPS (76%), differed in gait abnormalities and presence of extrapyramidal symptoms. Groups did not differ in terms of general cognitive functions evaluated using the Mini- mental State Examination, while subjects with MCI with mild EPS performed significantly worse than those with MCI without EPS in total global score and in non-memory items of the Alzheimer’s Disease Assessment Scale. Moreover, severity of EPS was significantly correlated with low performance on executive functions and with high performance on episodic memory. The group with MCI with mild EPS were observed to have a greater prevalence of patients with anxiety, depression, apathy and sleep disturbances than in MCI without EPS.
Conclusion: MCI may be associated with mild parkinsonian signs, the severity of which are related to the severity of cognitive impairment, in particular of non- memory functions, and to a differential pattern of psycho-behavioral symptoms
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
The importance of Alzheimer disease assessment scale-cognitive part in predicting progress for amnestic mild cognitive impairment to Alzheimer disease.
No full textThe aim of this study was to verify the usefulness of
Alzheimer Disease Assessment Scale-cognitive subscale
(ADAS-Cog), in screening participants at risk of
developing Alzheimer disease (AD) among populations
with amnestic mild cognitive impairment(aMCI). 98
outpatients with aMCI were recruited. Participants
were revaluated after 1 year: 44 (44.9%) were progressed
to AD (progressors), while 54 (55.1%) did not
convert (nonprogressors MCI). At baseline, cognitive
performances were more impaired in progressors
assessed by MMSE and by a neuropsychological
battery. When tested with the ADAS-Cog subscale,
the 2 groups of participants at baseline, progressors,
and nonprogressors MCI, were significantly different
regarding total score, memory, and nonmemory
subitems. Considering a cutoff of 9.5 total score,
adjusted for education, ADAS-Cog subscale showed a
good performance (area under the curve 1⁄4 0.67;
sensitivity 1⁄4 0.62%; specificity 1⁄4 0.73%) in predicting
conversion from aMCI to AD. Progressors aMCI were
characterized at baseline by a greater cognitive
impairment. ADAS-Cog subscale is a useful and brief
cognitive assessment tool to screen aMCI participants
converting to AD within 1 year
- …
