1,721,002 research outputs found
3D glasses as mobility aid for visually impaired people
No full textThis paper proposes an effective and wearable mobility aid aimed at improving the quality of life of people suffering for visual disabilities by enabling autonomous and safe navigation in unknown environments. Our system relies on dense and accurate depth maps, provided in real-time by a compact stereo vision system mapped into an FPGA, in order to detect obstacles in front of the user and to provide accordingly vibration feedbacks as well as audio information by means of a bone-conductive speakers. Compared to most approaches with similar purposes, even in the current prototype arrangement deployed for testing, our system is extremely compact, lightweight and energy efficient thus enabling hours of safe and autonomous navigation with standard batteries avoiding the need to carry cumbersome devices. Moreover, by conceiving the 3D sensing device as a replacement of standard glasses typically worn by visually impaired people and by using intuitive feedbacks provided by means of lightweight actuators, our system provides an ergonomic and comfortable user interface with a fast learning curve for its effective deployment. This fact has been extensively verified on the field by means of an experimental evaluation, in indoor as well as in outdoor environments, with different users simulating visual impairment including a blind person
A real time 3D sensor for smart cameras
No full textThank to the widespread diffusion of RGBD sensing devices based on active technologies, in recent years, many research and industrial applications have taken advantage of reliable cues computed from dense depth data. However, although these sensors can be very effective in many circumstances, they are not always well suited for outdoor environments and can also interfere with each other when sensing the same area. On the other hand, traditional systems based on passive stereo vision technology, due to their computational/energy requirements, reliability, size, cost etc, have been, so far, mostly confined to research projects. Nevertheless, recent advances in computation architectures and algorithms enable to overcome most of these issues and, in this paper, we describe the architecture and the processing pipeline of an effective RGBD sensor based on stereo vision suited for real time applications. This sensor allows us to infer, in indoor and outdoor environments, dense and accurate depth maps computed according to state-of-art algorithms and with minimal energy requirements that fit with typical constraints of smart camera systems
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
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
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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