1,721,119 research outputs found
COMVIS: A communication framework for computer vision
No full textWe present an advanced computer vision system based on the integration of different visual modules. The data fusion procedure is based on a representation of the scene in terms of planar patches. The applications of state-of-the-art algorithms allows to fuse correlated information while guaranteeing conservative error estimates.Extensive test on synthetic and real images show that our system produces a consistent and marked improvement over the results of single visual modules, with error reduction up to a factor often and with typical reduction of a factor 2–4
The role of spatio-temporal neural response characteristics in the formation of synchrony
No full textAlthough the functional role synchronous oscillations may play has been investigated in depth, the underlying processes and spatio-temporal aspects that establish the synchrony are still not thoroughly understood. Experimental studies suggest the existence of two kinds of oscillations: stimulus-locked and stimulus-induced. While stimulus-locked oscillations are systematically dependent on the stimulus, stimulus-induced oscillations (occurring in the γ frequency range) show only little stimulus dependency. We propose a unifying approach which employs very generic connection structures. Different degrees of synchrony on different time scales are observed as an emergent feature of the network structure. Our model demonstrates that both, stimulus-locked and stimulus-induced oscillations are just two different states of the same system. A transition from one state to the other is observed, and the synchronous activity provides the basis for binding visual features
State-dependent Spatio-temporal Restructuring of Receptive Fields in the Primary Visual Pathway
No full textChanging patterns in the EEG reflect changing states of attentiveness and are correlated to changes in the firing behavior of single cells. Prom experiments it is known that LGN cells of the Thalamus exhibit a tonic firing pattern during desynchronized EEG reflecting faithfully properties of a stimulus; whereas they are in a burst mode during synchronized EEG, which leads to a stereotype stimulus response. We introduce a model in which these changes in the neural temporal behavior lead to changes in the spatial characteristics of cortical receptive fields through variations in the effective connectivity between thalamic and cortical cells. This spatio-temporal receptive field restructuring reflects different modes of information processing and might be controlled by selective attention
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
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
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