1,720,994 research outputs found
Variable Structure PID Based Visual Servoing for Robotic Tracking and Manipulation
No full textThis paper presents a practical experiment on the use of visual servoing for robotic tracking and manipulation of objects moving on a plane. In this work, the image is acquired from the camera mounted on the end-effector of a 6 DOF industrial robot, and processed on a standard PC-based vision system in order to close the visual servoing loop with a PID based controller. The PID has been implemented with a variable structure, modified according to the estimated velocity of the target, in order to achieve a good step response and to eliminate steady-state error with a moving target. The possibility to perform a stable tracking and to estimate the target dynamics allows also to grasp the object with a prediction based trajectory planning
Ernia del disco lombare: studio longitudinale sulla concordanza fra quadro clinico ed imaging
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L'aspettativa
No full text1. L'aspettativa di cui all'art. 18: lettura in chiave sistematica della norma. - 2. La deroga al regime dell'incompatibilità. - 3. Il rapporto con l'art. 23 bis, d. lgs. n. 165/2001
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Ristrutturazione Domotica
No full textTra i settori applicativi più prometteneti della domotica, vi è sicuramente quello legato alle esigenze delle persone con diabilità. Gli obiettivi principali che ci si pone, in questi casi, rigardano un incremento delle attività che l'utente può svolgere in piena autonomia e del livello di sicurezza per le persone all'interno del contesto domestico. Per permettere un'ampia diffusione di queste soluzioni sul territorio, tuttavia, le sole attività tecnico-promozionali, spesso rivolte unicamente a personale tecnico installativo, non sono sempre sufficienti. C'è bisogno di nuovi attori che contribuiscano ad una crescita della consapevolezza delle potenzialità di queste tecnologie presso gli utilizzatori finali. In questo senso, un ruolo importante stanno avendo in questi anni gli appartamenti sperimentali e dimostrativi. L'intervento che descriveremo in questo numero si colloca proprio in questa categoria di riealizzazioni dimostrative, e una caratteristica estremamente interessante di questa realizzazione è che si tratta, con ogni probabilità, di uno dei primi interventi di "ristrutturazione" domotica del nostro paese
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