1,721,013 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
Cortical Thickness as a Predictor of Amygdala Reactivity in Healthy Adults
No full textBackground: Cortico-limbic affective processing regions undergo structural and functional changes with aging. However, there are no investigations into the relationships between measures of cortical thinning and affective functional reactivity in older adults.
Methods: Two groups of Caucasian men (n = 10 each, aged 60 – 85 years, and aged 20 – 40 years) underwent structural and functional magnetic resonance imaging during which they completed affective and sensorimotor (control) tasks administered according to a blocked design.
Results: Age groups were comparable in amygdalae response to negative affect. Older men were best distinguished from young by thinning of the gray matter in bilateral frontal, parietal and temporal lobes. Greater mean right amygdala activation was best predicted by a pattern of left orbito- and middle frontal cortical thickness/thinning in older men.
Conclusion: Even in the absence of age differences in amygdalae activation, prefrontal structure alterations uniquely influence emotional amygdala response in healthy older adults.M.Sc
Cortical Thickness as a Predictor of Amygdala Reactivity in Healthy Adults
Full text linkBackground: Cortico-limbic affective processing regions undergo structural and functional changes with aging. However, there are no investigations into the relationships between measures of cortical thinning and affective functional reactivity in older adults.
Methods: Two groups of Caucasian men (n = 10 each, aged 60 – 85 years, and aged 20 – 40 years) underwent structural and functional magnetic resonance imaging during which they completed affective and sensorimotor (control) tasks administered according to a blocked design.
Results: Age groups were comparable in amygdalae response to negative affect. Older men were best distinguished from young by thinning of the gray matter in bilateral frontal, parietal and temporal lobes. Greater mean right amygdala activation was best predicted by a pattern of left orbito- and middle frontal cortical thickness/thinning in older men.
Conclusion: Even in the absence of age differences in amygdalae activation, prefrontal structure alterations uniquely influence emotional amygdala response in healthy older adults.M.Sc
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
The Neural Correlates of Impaired Insight into Illness in Schizophrenia
No full textImpaired insight into illness is a common, but poorly understood feature of schizophrenia that contributes to medication nonadherence, poor treatment outcomes, higher rates of relapse and rehospitalization. Impaired insight into illness or anosognosia occurs in both schizophrenia and right hemisphere lesions due to stroke, dementia, and traumatic brain injury. In the latter conditions, anosognosia is thought to arise from unilateral hemispheric dysfunction or interhemispheric disequilibrium, which provides an anatomical model for exploring impaired insight into illness in other neuropsychiatric disorders, such as schizophrenia. To this end, we investigated the structural and functional neural correlates of impaired insight into illness in schizophrenia using magnetic resonance imaging (MRI). First, we performed volume-based structural analyses of hemisphere asymmetry in participants with schizophrenia to explore the relationship between impaired insight and regional brain volume. Impaired insight into illness was associated with rightPh.D
The Neural Correlates of Impaired Insight into Illness in Schizophrenia
Full text linkImpaired insight into illness is a common, but poorly understood feature of schizophrenia that contributes to medication nonadherence, poor treatment outcomes, higher rates of relapse and rehospitalization. Impaired insight into illness or anosognosia occurs in both schizophrenia and right hemisphere lesions due to stroke, dementia, and traumatic brain injury. In the latter conditions, anosognosia is thought to arise from unilateral hemispheric dysfunction or interhemispheric disequilibrium, which provides an anatomical model for exploring impaired insight into illness in other neuropsychiatric disorders, such as schizophrenia. To this end, we investigated the structural and functional neural correlates of impaired insight into illness in schizophrenia using magnetic resonance imaging (MRI). First, we performed volume-based structural analyses of hemisphere asymmetry in participants with schizophrenia to explore the relationship between impaired insight and regional brain volume. Impaired insight into illness was associated with rightPh.D
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
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