1,720,968 research outputs found
Type A botulinum toxin in the treatment of bruxism clenching and facial pain: randomized blinded placebo-controlled study
No full textFlexible 3D localization of planar objects for industrial bin-picking with monocamera vision system
No full textFlexible 3D localization of planar objects for industrial bin-picking with monocamera vision system
No full textA Smart Workcell for Automatic Pick and Sorting for Logistics
Full text linkVision guided robots are enjoying growing success in industry, thanks to their adaptability to unstructured contexts and applications. In typical bin-picking applications, a robot is guided to pick known rigid objects randomly placed inside a container. Given the objects' CAD models, it is possible to accurately estimate the object pose and to perform the grasp synthesis in a closed form. Unfortunately, in logistics, as in many other sectors, robotcs are required to manipulate polymorphic and deformable objects. In this work, we present a complete robotized pick and place solution for logistics able to address these challenges related to the variability of shapes of the objects. It exploits a model-less data-driven approach to bin-picking to detect boxes and parcels both randomply placed in containers or palletized. The proposed system will be easily adaptable to a wide range of applications, thus greatly improving its potential impact
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
An interactive robotic sculpture
No full textThis paper describes the software and hardware implementation of a mobile robotic sculpture. This work is the result of the meeting of robotics and art. The robot is able to locate people in the environment, to navigate toward them avoiding the obstacles and to approach them as a polite waiter will do. In fact, the sculpture represents a waiter and a waitress. The waiters chat among them (by play different pre recorded voice files) when wandering in the environment. Once the robot locates a person and get close to her, it asks the customer different questions like: ”Would you like a drink?”, that is the title of the sculpture.
The robot development started from an idea of the artist Albano Guatti. The final shape and appearance of the statue was already determined before the design of the robot integrated in the sculpture to provide it with autonomous behaviours. Therefore, from the beginning strong constraints were posed to the possible robot mechanical structure and sensors. The robot’s main sensor an omnidirectional camera (well integrated with the artistic appearance of the statue). The omnidirectional camera was chosen with respect to classical perspective cameras to provide the robot with the feeling of being immerse in the environment thanks to the 360° field of view of the camera. The people detection software is based on two filters: a motion detection filter based on the background subtraction algorithm and a skin detection filter, based on a new skin detection filter working in a generalised colour space. The omnidirectional visual perception is coupled to an omnidirectional range sensor realized with a ring of Polaroid sonar sensors. The sonars are used to detect obstacles in the environment to avoid them and to calculate the distance of the people to be approached. The sonars data are processed using a modified VHF (Vector Field Histogram) to be robust to the intrinsic noise of these sensors. We designed and realized a simple photoresistor circuit that can light reflectivity discontinuity on the floor.
This can be used to bound the working space of the robot by using a carpet as working space or by putting tape stripes on the floor bounding the working area. The hardware and software design was driven by the experience maturated in our laboratori during the Middle-Size RoboCup Competitions. Our students were able to port what they learnt in the didactical experience of the RoboCup into a commercial product realized in collaboration between the IAS-Lab of the University of Padua and IT+Robotics srl a spin-off of the University of Padua
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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