1,720,961 research outputs found
Smart readout design for tactile sensing devices
No full textThis article discusses the electronic readout design for tactile sensing transducers based on POSFETs (Piezoelectric Oxide Semiconductor Field Effect Transistors). The design approach, the proposed electronic architecture and the experimental results for validating the proof of concept are presented. This readout features a reduced number of circuits and is implemented with off-the-shelf electronic components. The design takes into account the application related requirements as well as the constraints posed by existing hardware on the humanoid robot 'iCub' [1]. © 2011 IEEE
Interface electronics for tactile sensing arrays
No full textThis paper presents the interface electronics design and implementation of a tactile sensing system for humanoid robot applications. The tactile system is designed to cover the human tactile sensing bandwidth ranging from 1Hz to 1kHz and to operate on a wide range of input forces/pressures. Some interface electronics prototypes have been designed and fabricated. The paper reports the experimental results and the validation of the proposed implementation. We report also results of the electro-mechanical response of the tactile sensing system (i.e. tactile sensing array + interface electronics) to external mechanical stimuli. The current implementation is a first step towards dedicated IC integration. © 2011 IEEE
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
Reliable and efficient phase noise simulation of mixed-mode integer-N Phase-Locked Loops
No full textVariations 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
BridGE: A New System to Train Selective Pelvis Movements
No full textBackground: Sitting balance is an important target in motor rehabilitation and injury prevention as poor sitting posture can induce musculoskeletal problems affecting life quality. Exercises to improve core stability like strengthening specific muscles of the low-back or of the pelvic floor performing selective pelvic movements exercises have been suggested to improve sitting balance promoting an efficient interaction between spine, pelvis, and the entire kinematic chain. It is in this framework and with such aim that we developed a new device BridGE and we preliminary tested it with healthy subjects.Methods: BridGE is a sensorized balance board with two IMUs, one inside the balance board and one on the trunk of the subject that is sitting on it, for training selected pelvis movements while monitoring the trunk position. Subjects performed various tasks controlling vertical and horizontal movement of a cursor on a screen with two distinct pelvic movements: lateral tilt and antero-posterior tilt. During practice we also monitored the trunk tilt as the request was to maintain the trunk as still as possible, to decouple trunk and pelvis movements.Results: After training with BridGE subject had significant improvements in pelvic movements and in trunk posture decreasing trunk undesired movements and increasing the isolation of the pelvis tilts in the antero-posterior and right-left directions.Conclusions: This is a first proof of concept that BridGE is an effective low-cost tool to train selective movements of the pelvis avoiding unnecessary trunk compensatory movements and, in the future, could be a useful tool for sitting balance rehabilitation
A general-purpose system for long-term recording from a microelectrode array coupled to excitable cells.
No full textAppropriate 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
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