1,721,086 research outputs found
Reorganization of Functional Connectivity of the Language Network in Patients with Brain Gliomas
No full textBACKGROUND AND PURPOSE: fcMRI measures spontaneous and synchronous fluctuations of BOLD
signal between spatially remote brain regions. The present study investigated potential LN fcMRI
modifications induced by left hemisphere brain gliomas.
MATERIALS AND METHODS: We retrospectively evaluated fcMRI in 39 right-handed patients with a left
hemisphere brain glioma and 13 healthy controls. Patients and controls performed a verb-generation
task to identify individual BOLD activity in the left IFG (Broca area); the active region was used as seed
to create whole-brain background connectivity maps and to identify the LN (including bilateral regions
of the IFG, STS, and TPJ) following regression of task-evoked activity. We assessed differences
between patients and controls in the pattern of functional connectivity of the LN, as well as potential
effects of tumor position, histopathology, and volume.
RESULTS: Global fcMRI of the LN was significantly reduced in patients with tumor compared with
controls. Specifically, fcMRI was significantly reduced within seed regions of the affected hemisphere
(left intrahemispheric fcMRI) and between the TPJ of the 2 hemispheres. In patients, the left TPJ node
showed the greatest decrease of functional connectivity within the LN.
CONCLUSIONS: The presence of a brain tumor in the left hemisphere significantly reduced the degree
of fcMRI between language-related brain regions. The pattern of fcMRI was influenced by tumor
position but was not restricted to the area immediately surrounding the tumor because the connectivity
between remote and contralateral areas was also affected
Hypoxic pelvic perfusion using percutaneous stopflow technique in the treatment of unresectable locally recurrent rectal cancer in 15 homogeneous patients.
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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
Dealing with Comprehension and Bugs in Native and Cross-Platform Apps: A Controlled Experiment
No full textIn this paper, we present the results of a controlled experiment aimed to investigate whether there is a difference when comprehending apps implemented with either cross-platform (Ionic-Cordova-Angular) and native (Android) technologies. We divided participants into two groups. The participants in each group were asked to comprehend the source code of either the app implemented using Ionic-Cordova-Angular technology or its Android version. We also asked the participants to identify and fix faults in the source code. The goal was to verify if the technology might play a role in the execution of these two kinds of tasks. We also investigated the affective reactions of participants and the difficulty they perceived when accomplishing the tasks mentioned before. The most important take-away result is: there is not a statistically significant difference in the comprehension and in the identification and fixing of bugs when dealing with either native or cross-platform apps
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
Does the Migration of Cross-Platform Apps Towards the Android Platform Matter? An Approach and a User Study
No full textWe present an approach to migrate cross-platform apps toward a native platform (i.e., Android). The approach is tailored to Ionic, i.e., an open-source framework providing a mobile UI (User Interface) toolkit for developing high-quality cross-platform apps. The validity of our approach has been validated on an open-source app developed by means of Ionic (i.e., Movies-app). In such a way, we had two versions of the same app: one developed in Ionic (the original one) and the other in Android (the migrated one). To investigate if there is a difference in the user experience when using these two versions, we conducted a user study. This user study also aimed at assessing the presence of possible differences in the affective reactions of users when using these two versions of Movies-app. The results suggest that the user experience is better when users deal with the migrated app. Similar results were achieved with respect to the affective reactions of users. We can then conclude that the migration from Ionic towards Android matters
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
Recurrent stereotyped TIAs: atypical Bow Hunter’s syndrome due to compression of non-dominant vertebral artery terminating in PICA
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