1,721,039 research outputs found
Bluetooth indoor localization with multiple neural networks
No full textOver the last years, many different methods have
been proposed for indoor localization and navigation services
based on Radio frequency (RF) technology and Radio Signal
Strength Indicator (RSSI). The accuracy achieved with such
systems is typically low, mainly due to the variability of RSSI
values, unsuitable for classic localization methods (e.g.
triangulation). In this paper, we propose a novel approach based
on multiple neural networks. We demonstrate with experimental
results that by training and then activating different neural
networks, tailored on the user orientation, high definition
accuracy is achievable, allowing indoor navigation with a cost
effective Bluetooth (BT) architecture
Bluetooth indoor localization with multiple neural networks
No full textOver the last years, many different methods have
been proposed for indoor localization and navigation services
based on Radio frequency (RF) technology and Radio Signal
Strength Indicator (RSSI). The accuracy achieved with such
systems is typically low, mainly due to the variability of RSSI
values, unsuitable for classic localization methods (e.g.
triangulation). In this paper, we propose a novel approach based
on multiple neural networks. We demonstrate with experimental
results that by training and then activating different neural
networks, tailored on the user orientation, high definition
accuracy is achievable, allowing indoor navigation with a cost
effective Bluetooth (BT) architecture
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
Cystic lymphoepithelial lesions of salivary glands in HIV positive and negative patients
No full textA Cost-effective Indoor Vibrotactile Navigation System for the Blind
No full textThis paper describes the development of an indoor vibrotactile navigation system for the visually impaired people. We aimed at realizing a wearable, low-cost, and effective system able to help blind users in unknown indoor environments that they might visit occasionally, such as hospitals, airports, museums, etc.
The designed system implements a Bluetooth (BT) localization service, and provides wayfinding cues to the user by means of a wearable device equipped with five motors. The last part of our work describes early results obtained by the use of electroencephalographic (EEG) analysis to evaluate the vibrotactile feedback
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
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