1,720,971 research outputs found
Robust Visual Localization of a UAV over a Pipe-Rack Based on the Lie Group SE(3)
Full text linkVisual inspection and maintenance ofindustrialpipes using robots represent an emerging application in Oil Gas and refinery facilities. In this domain, we present a pose tracking system based on a single camera sensor to localize an unmanned aerial vehicle operating over a pipe-rack to carry out inspection activities. We propose a unified framework based on the Lie group SE(3) which allows the simultaneous estimation of the pose of the UAV along with some parameters of the pipe-rack model. Numerical simulations have been performed to demonstrate the effectiveness of the proposed approach
Supervised hand-guidance during human robot collaborative task execution: A case study
No full textWe present and discuss a human-robot collaboration system suitable for supervising the execution of structured manipulation tasks in industrial assembly scenarios. As a case study, we consider the application domain proposed in the context of the project (PON R& I 2014-2020) ICOSAF (Integrated collaborative systems for Smart Factory) in which a human operator physically interacts with a collaborative robot (Cobot) to perform multiple item insertion tasks in a shared workspace. The proposed system combines hierarchical task orchestration and human intention recognition during human-robot interaction through hand-guidance. We provide an overview of the system discussing an initial experimental evaluation
A Novel Hybrid Aerial-Ground Manipulator for Pipeline Inspection tasks
No full textAutonomous inspection of industrial pipelines in Oil Gas refiners represents an emerging research and application field. In this context, we present a novel hybrid aerial ground mobile platform for inspection tasks. The goal of this platform is to assist human operators to perform non-destructive tests to assess the quality status of pipelines carrying fluids. Thanks to its design, the proposed platform is able to navigate crowded environments to reach and land over industrial pipes and use its motion capabilities to inspect the pipe surface. In this work, we introduce the mechanical design of the hybrid platform discussing its main components, demonstrating its flying and inspection capabilities
An ARVA Sensor Simulator
No full textRobot Operating System (ROS) framework supports different kind of sensors, typically used to develop robotic applications, such as vision and depth sensors, laser scanners and so on. In this chapter, we present a new ROS package designed to simulate ARVA transceiver sensors: arva_sim. ARVA is a French acronym which stands for Appareil de Recherche de Victims en Avalanche and represents the forefront technology adopted in Search & Rescue operations to localize victims of avalanches buried under the snow. In order to simulate its behavior, this package provides two Gazebo plugins: the transmitter and receiver. The aim of this chapter is to describe the mathematical and theoretical background of the transceiver, discussing its implementation and integration with ROS. To demonstrate the accuracy of the proposed sensor model, we present a simulation scenario in which an Unmanned Aerial Vehicle (UAV) equipped with the transceiver sensor performs a basic S&R pattern using the output of ARVA system. It is worth nothing that the proposed ROS package, arva_sim, represents the first simulation model of an ARVA transceiver system and can be useful for the developer to design, test and benchmark faster and smarter search strategies to speed up rescue missions in case of avalanches
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
Combining human guidance and structured task execution during physical human–robot collaboration
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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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