1,721,227 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
Multimodal Integration in Psychiatry: Clinical Potential and Challenges
No full textThe integration of complementary neuroimaging and neurosignaling modalities allows us to obtain a comprehensive view of the structural and functional brain properties and to extend the spatiotemporal domain investigated. In this chapter will explore the domains of multimodal integration that seem to be more relevant in the study of the cerebral bases of psychiatric disorders as an essential contribution to the construction of a personalized and broad-spectrum model of brain anatomy and function, useful in the early identification of risk or diagnostic profiles and in the planning of effective treatment strategies
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
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
Anti-basal ganglia antibodies and Tourette's syndrome: a voxel-based morphometry and diffusion tensor imaging study in an adult population
No full textAnti-basal ganglia antibodies (ABGAs) have been suggested to be a hallmark of autoimmunity in Gilles de la tourette's syndrome (GTS), possibly related to prior exposure to streptococcal infection. In order to detect whether the presence of ABGAs was associated with subtle structural changes in GTS, whole-brain analysis using independent sets of T1 and diffusion tensor imaging MRI-based methods were performed on 22 adults with GTS with (n = 9) and without (n = 13) detectable ABGAs in the serum. Voxel-based morphometry analysis failed to detect any significant difference in grey matter density between ABGA-positive and ABGA-negative groups in caudate nuclei, putamina, thalami and frontal lobes. These results suggest that ABGA synthesis is not related to structural changes in grey and white matter (detectable with these methods) within frontostriatal circuits
Early detection of idiopathic Parkinson's disease based on magnetic resonance imaging
No full textThe diagnosis of idiopathic Parkinson's disease (IPD) is entirely clinical. The fact that
neuronal damage begins 5-10 years before occurrence of sub-clinical signs, underlines the
importance of preclinical diagnosis.
A new approach for in-vivo pathophysiological assessment of IPD-related neurodegeneration
was implemented based on recently developed neuroimaging methods. It is based on non-
invasive magnetic resonance data sensitive to brain tissue property changes that precede
macroscopic atrophy in the early stages of IPD.
This research aims to determine the brain tissue property changes induced by
neurodegeneration that can be linked to clinical phenotypes which will allow us to create a
predictive model for early diagnosis in IPD.
We hypothesized that the degree of disease progression in IPD patients will have a differential
and specific impact on brain tissue properties used to create a predictive model of motor and
non-motor impairment in IPD.
We studied the potential of in-vivo quantitative imaging sensitive to neurodegeneration-
related brain tissue characteristics to detect changes in patients with IPD. We carried out
methodological work within the well established SPM8 framework to estimate the sensitivity
of tissue probability maps for automated tissue classification for detection of early IPD. We
performed whole-brain multi parameter mapping at high resolution followed by voxel-based
morphometric (VBM) analysis and voxel-based quantification (VBQ) comparing healthy
subjects to IPD patients.
We found a trend demonstrating non-significant tissue property changes in the olfactory bulb
area using the MT and R1 parameter with p<0.001. Comparing to the IPD patients, the
healthy group presented a bilateral higher MT and R1 intensity in this specific functional
region. These results did not correlate with age, severity or duration of disease. We failed to
demonstrate any changes with the R2* parameter.
We interpreted our findings as demyelination of the olfactory tract, which is clinically
represented as anosmia. However, the lack of correlation with duration or severity complicates its implications in the creation of a predictive model of impairment in IPD
- …
