1,720,963 research outputs found
Validazione di una scala di soddisfazione di vita in forma ridotta su soggetti anziani istituzionalizzati e non.
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A runtime monitoring framework to enforce invariants on reinforcement learning agents exploring complex environments
No full textWithout prior knowledge of the environment, a software agent can learn to achieve a goal using machine learning. Model-free Reinforcement Learning (RL) can be used to make the agent explore the environment and learn to achieve its goal by trial and error. Discovering effective policies to achieve the goal in a complex environment is a major challenge for RL. Furthermore, in safety-critical applications, such as robotics, an unsafe action may cause catastrophic consequences in the agent or in the environment. In this paper, we present an approach that uses runtime monitoring to prevent the reinforcement learning agent to perform 'wrong' actions and to exploit prior knowledge to smartly explore the environment. Each monitor is de?ned by a property that we want to enforce to the agent and a context. The monitors are orchestrated by a meta-monitor that activates and deactivates them dynamically according to the context in which the agent is learning. We have evaluated our approach by training the agent in randomly generated learning environments. Our results show that our approach blocks the agent from performing dangerous and safety-critical actions in all the generated environments. Besides, our approach helps the agent to achieve its goal faster by providing feedback and shaping its reward during learning
Validazione del punteggio scalare per la scala ADL (attività di vita quotidiana).
No full textNel presente lavoro si propone la validazione di una nuova modalità di scoring dell'Indice di Indipendenza in Attività di Vita quotidiana (ADL) all'interno di un disegno di ricerca longitudinale. Tale validazione è stata effettuata su un campione di anziani residenti presso una casa di riposo del Lazio. L'Indice ADL è stato validato in funzione delle percentuali di risposta fornite alle alternative per ogni item quando valutate tramite la modalità tradizionale dicotomica e la nuova modalità scalare a tre passi tipo Likert. I risultati indicano che il punteggio è più sensibile nel determinare lo status funzionale intermedio dell'anziano istituzionalizzato. Il punteggio scalare degli item e del totale della scala predice più spesso le misure criterio prese in esame rispetto al punteggio dicotomico degli item e del totale della scala. Gli stessi risultati emergono a distanza di 9 mesi
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
Race and rag dolls: Reading the embodiment of diversity in Laloopsy transmedia
Full text linkThis is an Accepted Manuscript of a book chapter published by CRC Press in Literacies, Learning, and the Body: Putting Theory and Research into Pedagogical Practice on 26 October 2015, available online: https://www.crcpress.com/Literacies-Learning-and-the-Body-Putting-Theory-and-Research-into-Pedagogical/Enriquez-Johnson-Kontovourki-Mallozzi/p/book/9781138906211.Young children’s engagements with literacy occur as immersive and embodied interactions with an increasingly commercialized and globalized textual landscape (Carrington, 2005). On a daily basis, preschoolers not only read or listen to their favorite stories but embody their favorite characters and narratives through engagements with media franchises that link multiple products across multiple platforms. As children watch television programs and DVDs, tap through games and apps on tablets and phones, play with dolls and action fi gures, they can also be clothed in licensed apparel, snack on character gummies, tote school supplies in themed backpacks, and so on. These franchises of branded products grounded by a media narrative, or transmedia, produce far-reaching, ubiquitous, and pervasive fl ows of merchandise but also circulate discursive messages attached to media narratives and are amplifi ed through advertising (Lemke, 2009)
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
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