1,720,959 research outputs found
A Wearable and Semi-automated Timed-Up and Go Test: Implementation and Accuracy Validation
No full textIn the last decade the introduction of wearable technologies supported the implementation of reliable quantification tools for clinical functional assessment. Within this frame, this work was focused on the development and validation of a wearable system for analyzing motor function, particularly using the Timed-Up and Go (TUG) test. This study specifically aimed to create a wearable device that could quantify and automate the TUG test, collecting not only the time taken but also various kinematic parameters like accelerations, velocity, and number of steps. The wearable actigraph, fixed at the pelvis by means of an elastic band, measured and stored 3D inertial parameters for processing and analysis. The validation involved comparing manual TUG test times with those obtained using the actigraph, showing a high level of agreement and accuracy. The study included healthy subjects and individuals with different pathologies like post-stroke, multiple sclerosis, and Parkinson's, demonstrating the system's feasibility in clinical settings. Overall, the wearable system proved effective in quantifying and automating the TUG test, offering a possible remote, self, and unsupervised method for functional evaluation and tele-rehabilitation programs
Aerodynamics of jump in downhill ski racing
No full textThe paper presents a study about the aerodynamics of jump in downhill skiing. The activity consisted of wind tunnel investigation in a large wind tunnel where several different positions (corresponding to the different phases of take off, flight and landing) have been tested thanks to an apposite rig and to two athletes (in the following referred as “Skier A” and “Skier B”). Drag, lift and pitching moment have been measured by means of strain gauge balances. In order to acquire the actual skier position during the test a motion analysis system, equipped with six video-cameras, was used. Anthropometric measures and dedicated algorithms were used to estimate and filter 3D coordinates of internal joint centers and joint angles. Finally, a simple dynamic model of the skier during the jump has been implemented in a prediction code that compute, on the base of bump shape, the jump trajectory and duration
Sensor validation for wearable monitoring system in ambulatory monitoring: application to textile electrodes
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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
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