Horizontal-to-vertical spectral ratio (HVSR) is a widely used geophysical technique in seismic microzonation studies. It is based on a specific analysis of seismic ambient noise. The method allows to obtain the frequency and amplitude of the resonance peaks of a layered earth with increasing acoustic impedance contrasts. The peaks can be interpreted to obtain an estimation of depth(s) of the impedance contrast horizon(s). Based on the assumption that long-term human trampling results in sediment's stiffening, which increased both density and velocity of seismic shear waves, the HVSR method was applied to investigate the shallow subsurface of an important, Middle Bronze Age, archaeological site called 'Pilastri Terramara' discovered at the end of the last century. Following recent excavations, archaeologists supposed that the settlement could extend outside the initially hypothesized borders, and decided to involve geophysicists to verify the truthiness of this new hypothesis and consequently to map the possible spatial extent of the paleo-surfaces frequented by ancient occupants. The purpose of the geophysical investigation was then to detect and possibly to map one or more anthropogenic paleo-surfaces over a relatively large area (about 12000 m 2 ). Unfortunately, direct evidences showed that the paleo-surfaces were embedded in clayey sediments and laying at depths ranging between 50 and 170 cm below ground level. Furthermore, the area to be investigated is occupied by a farm with glasshouses and other buildings. These obstacles constituted a real challenge that hindered the utilization of the most commonly used geophysical methods in archaeology, i.e. ground penetration radar (GPR), magnetometry and electrical resistivity tomography. For these reasons, we decided to use the HVSR method as a reconnaissance exploration tool, to confirm or rule out the presence of such paleo-surfaces. Spectral peaks related to acoustic horizons provided evidences about their presence and allowed to estimate their depths as was later confirmed by a new excavation.
Museums must adapt to the increasingly massive use of the Internet, and use it to reach new audiences and find new ways of enhancing culture, or consolidate the relationship with their existing public. Therefore, defining an online strategy that conforms to the museum's mission may prove difficult. One of the challenges cultural organisations face in this regard is how to define, measure and evaluate their efficiency and approach.
In the present article, we will study the digital instruments adopted by Italian museums to communicate on and promote their heritage collections on the web, and enhance the involvement and participation of audiences in the digital environment. Our aim is to present and discuss the results of the first online web strategy survey conducted in 2017, by ICOM Italy and the Italian Ministry of Culture (MiBAC). The survey and its findings show that Italian museums have risen to the challenge, by working on defining and developing their digital web strategy. The conclusion will highlight the gaps and some points for future reflection with a focus on open data. We hope that a wider museum community can adopt our monitoring tool, the 17 web strategy parameters, and share results.
Go to Neurology.org/N for full disclosures. Funding information and disclosures deemed relevant by the authors, if any, are provided at the end of the article.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.