1,720,974 research outputs found
Impact of monitor-based augmented reality for on-site industrial manual operations
No full textThis work evaluates the impact of augmented reality (AR) technology to support operators during manual industrial tasks. The work focuses specifically on monitor-based augmented reality as a solution to provide instructions to the operator. Instructions are superimposed directly onto a video representation of the physical workspace and are displayed on a standard monitor. In contrast to previous AR solutions proposed to support manual tasks, the current work is more industrially acceptable because it meets most of the industrial requirements and it is cost effective for a deployment in an industrial environment. The developed prototype is described and evaluated by means of a user study to compare the monitor-based augmented reality solution to provide instructions and the traditional method. The test shows that AR can be a valid substitute to support the operators during manual tasks because it allows them to be more time efficient and it reduces their mental workload compared to traditional instructional manuals
A natural user interface for navigating in organized 3D virtual contents
No full textThe research activity presented in this paper aim at extending the traditional planar navigation, which is adopted by many desktop applications for searching information, to an experience in a Virtual Reality (VR) environment. In particular, the work proposes a system that allows the user to navigate in virtual environments, in which the objects are spatially organized and sorted. The visualization of virtual object has been designed and an interaction method, based on gestures, has been proposed to trigger the navigation in the environment. The article describes the design and the development of the system, by starting from some considerations about the intuitiveness and naturalness required for a three-dimensional navigation. In addition, an initial case study has been carried out and consists in using the system in a virtual 3D catalogue of furniture. © 2014 Springer International Publishing
An augmented reality framework for supporting and monitoring operators during maintenance tasks
No full textThe paper proposes a framework for supporting maintenance services in industrial environments through the use of a mobile device and Augmented Reality (AR) technologies. 3D visual instructions about the task to carry out are represented in the real world by means of AR and they are visible through the mobile device. In addition to the solutions proposed so far, the framework introduces the possibility to monitor the operator's work from a remote location. The mobile device stores information for each maintenance step that has been completed and it makes them available on a remote database. Supervisors can consequently check the maintenance activity from a remote PC at any time. The paper presents also a prototype system, developed according to the framework, and an initial case study in the field of food industry. © 2014 Springer International Publishing
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
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