1,721,117 research outputs found
Robots for Maintenance and restoration tasks
No full textUniversities of Trieste and Udine are developing new paradigms for robots involved in maintenance and restoration tasks. Examples of such tasks are cleaning (laser ablation, chemical treatment, mechanical ablation), painting and local monitoring. The paper is devoted to such tasks which could benefit from robots or automatic devices.
To this regard, our approach consists in exploring the combination of two robotic devices: a device with a large workspace for the gross motion (Gross Motion Robot: GMR) and a smaller robot for the fine motion (Fine Motion Robot: FMR). The GMR is less accurate than the FMR, but it posses a larger workspace. From the kinematic point of view, the FMR is attached to the final link of the GMR; this way, the FMR can be thought of as the end-effector of the GMR.
The GMR could be a robotic vehicle provided with a lifting system. The FMR could be either an industrial robot or a dedicated lighter robot. It is provided with the specific tool involved in the operation (laser, spray gun, scrubber, dispenser, etc.)
In order to operate on a large workspace like the facada of a building, the GMR has to be capable to bring the FMR to the desired position. Once the FMR completes the task locally, the GMR has to move the FMR to contiguous location.
In order to have a light and efficient FMR, a cable direct driven robot is proposed
Automatic alignment of workpieces for robotic manipulation using a conveyor belt and fixed flat fences
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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
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
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