Abstract. The stability of an arch as a structural element in the thermal bath of King Charles Albert (Carlo Alberto) in the Royal Castle of Racconigi (on the UNESCO World Heritage List since 1997) was assessed by the acoustic emission (AE) monitoring technique with application of classical inversion methods to recorded AE data. First, damage source location by means of triangulation techniques and signal frequency analysis were carried out. Then, the recently introduced method of natural-time analysis was preliminarily applied to the AE time series in order to reveal a possible entrance point to a critical state of the monitored structural element. Finally, possible influence of the local seismic and microseismic activity on the stability of the monitored structure was investigated. The criterion for selecting relevant earthquakes was based on the estimation of the size of earthquake preparation zones. The presented results suggest the use of the AE technique as a tool for detecting both ongoing structural damage processes and microseismic activity during preparation stages of seismic events.
This contribution arises from the interest (on the themes of semiotics and communication of architecture, even in its deep meanings) derived from studies and comparisons with Renato De Fusco, Maria Luisa Scalvini, Pio Luigi Brusasco, Pier Tosoni, Alberto Borghini. A question has been confirmed: what can be the meanings of architecture, especially in the visual field? What are its own contents, and what are "other" contents? Around this subject a research team with scholars of the Politecnico di Torino (called "Alpha Group") was constituted; which has now resumed in a convergent manner to investigate and experiment semiotic in architecture; paying attention to languages of vision. The approach of the chosen method is inspired (in a comparative experiment) to the Nouvelle Rhétorique, the Groupe μ of Liège (with Greimas, Hielmslev, Perelman) internationally known for the definition of an applied rhetoric model-a classic of the human sciences-dedicated to interdisciplinary research, which crosses the aesthetic approach with semiotics, theory of linguistics and visual communication. The first conclusion tends to reinforce the in-depth analysis of the method, and the enhancement of interdisciplinary comparisons, first of all the one with semiotic.
Abstract. The stability of an arch as a structural element in the thermal bath of King Carlo Alberto in the Royal Castle of Racconigi (on the UNESCO World Heritage List since 1997) was assessed by the Acoustic Emission (AE) monitoring technique with application of classical inversion methods to recorded AE data. First, damage source location by means of triangulation techniques and signal frequency analysis were carried out. Then, the recently introduced method of natural time analysis was preliminarily applied to the AE time series in order to reveal possible entrance point to a critical state of the monitored structural element. Finally, possible influence of the local seismic and micro-seismic activity on the stability of the monitored structure was investigated. The criterion to select relevant earthquakes was based on the estimation of the size of earthquake preparation zones. The presented results suggest the use of AE technique as a tool for detecting both ongoing structural damage processes and micro-seismic activity during preparation stages of seismic events.
In recent years, researchers, social commentators and the mass media have turned their attention to shifts in the use of social media for political and social action. This article provides an overview of the recent discussions focusing on how Twitter specifically functions as a mediating tool for social acts. We present findings from a recent pilot project exploring the mechanics of disseminating information via Twitter across a dynamic human network in order to contribute to an understanding of how people use social media to share information and prompt others into action, and outline some approaches for performing this analysis. Taking the perspective of communities of users operating in hybrid spaces, we make recommendations for further research in this field. Key words: Twitter, hybrid spaces, social networks, social acts, information flow
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