1,721,240 research outputs found
Book reprint of the Special Issue "Challenges and New Trends in Power Electronic Devices Reliability" , Electronics ( MDPI)
No full textThis book is a collection of papers regarding recent approaches to the evaluation of Reliability in Power Electronic Devices.
The book is addressed to all academic and insustrial researchers involved in the evaluation of Risk, Reliability, and Availability in power electronic converters for energy and transprtation aplication
A New Data Glove Equipped With Joint Displacement Sensors Based on Optoelectronic Technology
No full text
Online Segmentation and Classification of Manipulation Actions From the Observation of Kinetostatic Data
No full textThis paper presents an automated method for segmentation and classification of manipulation tasks. It introduces a method to build and update a dictionary of elementary actions, so as to express observed tasks as a sequence of items. Segmentation is carried out by splitting an observed manipulation task into submaneuvers. It is based on singular value decomposition of data that is gathered from the observation of humans. This observation consists of hand joint angles, the hand pose with respect to a world frame, and fingertip contact forces. The classification step introduces, from a large set of observed maneuvers, new entities called elementary actions that generalize the concept of segments, instances of elementary actions. This paper uses fingertip contact forces in the measured data. In grasping and manipulation tasks, the interaction between the hand and the object in the physical world is necessary to segment and interpret motion. A set of maneuvers involving six tasks have been used to evaluate the methods with dependent measures including metrics of robustness, effectiveness, and repeatability. In such evaluations, the average value of the effectiveness metrics over all the maneuvers is . The interuser repeatability is equal to , while the average repeatability is
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
Low-level flexible planning for mobile manipulators: a distributed perception approach
No full text<div><p>The paper proposes a method to improve flexibility of the motion planning process for mobile manipulators. The approach is based on the exploitation of perception data available only from simple proximity sensors distributed on the robot. Such data are used to correct pre-planned motions to cope with uncertainties and dynamic changes of the scene at execution time. The algorithm computes robot motion commands aimed at fulfilling the mission by combining two tasks at the same time, i.e. following the planned end-effector path and avoiding obstacles in the environment, by exploiting robot redundancy as well as handling priorities among tasks. Moreover, a technique to smoothly switch between the tasks is presented. To show the effectiveness of the method, four experimental case studies have been presented consisting in a place task executed by a mobile manipulator in an increasingly cluttered scene.</p></div
- …
