1,720,982 research outputs found
Manuale di Cardiologia, Chirurgia Vascolare e Cardiovascolare (4th edition)
No full textIl cuore è situato nel mediastino medio. Il solco atrioventricolare,
o solco coronario, separa gli atri dai ventricoli. Il solco
interventricolare a sua volta separa tra di loro i due ventricoli. Il
punto in cui il solco interventricolare interseca il solco atrioventricolare
è denominato crux cordis (croce cardiaca)
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
CHEWING GUM SIDE-PREFERENCE TEST CORRELATES WITH ASYMMETRY IN MASSETER MUSCLES VOLUMES
No full textAbstract - Several studies demonstrated the involvement of GABA and reactive oxygen species (ROS) in trigeminal pain transmission [1, 2, 3, 4]; anyway, there are still poorly understood mechanisms modulating pain, resulting, for instance, in hypoalgesia in hypertensive patients [4]. One possibility is that the activity of afferent neurons during mastication modulates ROS production in second-order sensory neurons [5]. An ongoing research project is aimed to reveal such mechanisms in humans with fMRI; here the preliminary results of the methodological approach to show an asymmetrical mastication will be reported, demonstrating that the chewing gum side-preference test correlates with anatomical features
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
Beyond motor neurons: new insights on amyotrophic lateral sclerosis neurodegeneration provided by advanced MRI tecnique
No full textAim
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease, characterized by the progressive degeneration of upper and lower motor neurons, but does not spare extra-motor areas, causing cognitive and behavioural syndromes.
To better investigate structural and functional abnormalities in ALS, we used resting-state fMRI data combined to VBM analysis and a quantitative DTI approach, by a TBSS analysis, in a population of behaviour impaired ALS patients.
Methods
We investigated 20 ALS patients (10 women and 10 men) ranging from 34 to 80 years (mean age 60.7 ± 11.1) of age, fulfilling the diagnostic criteria for probable or definite ALS, according to the revised El Escorial criteria of the World Federation of Neurology.
The control group comprised 20 healthy controls (10 men, 10 women) aged from 46 to 78 years (mean age 62.1 + 8.5 years) with no history of neurological or psychiatric diseases and without any abnormalities detected on conventional MRI T1 and T2 weighted images.
Magnetic resonance images were acquired on a 3-T GE Medical System scanner equipped with an 8-channel parallel head coil.
Results
The sensori-motor network (SMN) showed significant disease effects, with signal suppression in patients in the primary and the supplementary motor cortices. The same was visible frontally in the right fronto-parietal network, possibly reflecting the patients' frontal dysfunction. Compared with controls, ALS patients had significant clusters of reduced GM density in the left premotor and right fronto-parietal cortex. DTI analysis showed reduced FA values in the body of corpus callosum (CC) and bilaterally in WM tracts from the central CC to primary motor and premotor cortices, also including, with slight prevalence in the left hemisphere, corona radiata, anterior cingulate, superior longitudinal, inferior longitudinal, inferior occipito-frontal and uncinate fasciculi. The DTI pattern of predominantly frontal WM injury clearly reflects the frontal executive dysfunction that characterizes our ALS patients, and is in agreement with the growing body of evidence that degeneration of the frontotemporal lobar type may occur in ALS with a variable range of behavioral and cognitive impairments among patients. In patients a significant decrease of FA compared to controls mainly in the midbody of the CC, where for reduced FA vs increased UMN score a strong significant correlation was also seen. Additionally, for reduced FA vs lower ALS functional rating scale revised (ALSFRS-R), index of patients' disability, a striking trend of correlation was found both in in the WM underneath the left premotor cortex, especially the left paracentral lobule, including also anterior cingulate and superior longitudinal fasciculus. We confirmed the effect of ALS on the SMN network and investigated the possible extramotor involvement in ALS. The correlations between reduction of FA in the body of CC with the UMN score indicate that the WM degeneration in the CC is strictly related to the ALS pyramidal impairment, whilst the correlation between FA and ALSFRS-R in the associative tracts underneath the left premotor cortex might reflect the progressive spread of the disease from motor towards extra-motor areas
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
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