1,721,075 research outputs found
Hidden Costs of Stereo Depth in Real-Time Systems: LiDAR vs. Camera-Based 3D perception for ITS
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Slosh-induced piezoelectric energy harvesting in a liquid tank
No full textWhen a tank containing a liquid is excited externally, the free surface of the liquid becomes violently distorted, generating a large amount of wave energy. We suggest a novel model for harvesting wave energy produced by such sloshing. A deformable energy harvester with an attached piezoelectric patch is mounted vertically in the middle of a liquid tank. By varying the excitation amplitude and frequency of the tank, the level of water, and the thickness of the harvester, the dynamics of the harvester are investigated in terms of tip deflection and phase difference. The excitation frequency corresponding to sloshing resonance is critical for producing large tip deflections. Near resonance, the motions of the tank and the harvester are not necessarily synchronized, and there are large variations in the phase difference. The performance of the energy harvester is evaluated by measuring the open-circuit voltage, short-circuit current, and output power with an electrical load. The model has exceptional power generation performance and would be suitable for supplying power to small electrical devices. Moreover, the harvester is effective in suppressing the peak hydrodynamic pressure exerted on the tank wall, which suggests dual functions of our model as an energy harvester and as a baffle.
CollaGAN: Collaborative GAN for Missing Image Data Imputation
No full textIn many applications requiring multiple inputs to obtain a desired output, if any of the input data is missing, it often introduces large amounts of bias. Although many techniques have been developed for imputing missing data, the image imputation is still difficult due to complicated nature of natural images. To address this problem, here we proposed a novel framework for missing image data imputation, called Collaborative Generative Adversarial Network (CollaGAN). CollaGAN convert the image imputation problem to a multi-domain images-to-image translation task so that a single generator and discriminator network can successfully estimate the missing data using the remaining clean data set. We demonstrate that CollaGAN produces the images with a higher visual quality compared to the existing competing approaches in various image imputation tasks
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
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