Water confined in nanopores: spontaneous formation of microcavities

Molecular Dynamics simulations of water confined in nanometer sized, hydrophobic channels show that water forms localized cavities for pore diameter ~ 2.0 nm. The cavities present non-spherical shape and lay preferentially adjacent to the confining wall inducing a peculiar form to the liquid exposed surface. The regime of localized cavitation appears to be correlated with the formation of a vapor layer, as predicted by the Lum-Chandler-Weeks theory, implying partial filling of the pore

Time-Varying Spectral Analysis of a Single EEG Channel: Application in an Affective Protocol

Neural correlates of emotions have been widely investigated using noninvasive sensor modalities. These approaches are often characterized by a low level of usability and are not practical for real-life situations. The aim of this study is to show that a single EEG electrode placed in the central region of the scalp is able to discriminate emotional characterized events with respect to a baseline period. Emotional changes were induced using an imagery approach based on the recall of autobiographical events characterized by four basic emotions: "Happiness", "Fear", "Anger" and "Sadness". Data from 17 normal subjects were recorded on Cz position according to the International 10-20 System. After preprocessing and artifact detection phases, raw signals were analyzed through a time-variant adaptive autoregressive model to extract EEG characteristic spectral components. We considered 5 frequency bands, i.e. the classical EEG rhythms, namely the delta band (δ), [1-4] Hz, the theta band (θ), [4-6] Hz, the alpha band (α), [6-12] Hz, the beta band (β), [12-30] Hz, and the gamma band (γ), [30-50] Hz. The relative powers of the EEG rhythms were used as features to compare the experimental conditions. Our results show statistically significant differences when comparing the power content in the gamma band of baseline events versus emotionally characterized events. Particularly, we found a significant increase in gamma band relative power in 3 out of 4 emotionally characterized events, i.e. “Happiness” “Sadness” and “Anger". In agreement with previous studies, our findings confirm the presence of a possible correlation between broader high frequency cortical activation and affective processing of the brain. The present study shows that the use of a single EEG electrode represents a possible advantageous premise for the assessment of the emotional state with a minimally invasive set-up

Towards a Collaborative Filtering Framework for Recommendation in Museums: From Preference Elicitation to Group's Visits

AbstractRecommendation systems based on collaborative filtering methods can be exploited in the context of providing personalized artworks tours within a museum. However, in order to be effectively used, several problems have to be addressed: user preferences are not expressed as rating, items to be suggested are located in a physical space, and users may be in a group. In this work, we present a general framework that, by using the Matrix Factorization (MF) approach and a graph representation of a museum, addresses the problem of generating and then recommending an artworks sequence for a group of visitors within a museum. To reach a high-quality initial personalization, the recommendation system uses a simple, but efficient, elicitation method that is inspired by the MF approach. Moreover, the proposed approach considers the individual or the aggregated artworks' ratings to build up a solution that takes into account the physical location of the artworks

Verso la tecnologia 6G per i luoghi della cultura

Considering the remarkable historical, artistic, monumental, demoethno-anthropological, archaeological, archival and national library heritage, in order to improve the management and safety of places of culture, it becomes essential to focus attention on the new 6G technology which will allow the fusion of digital world with the physical world capable of transmitting huge amounts of data and information in seconds. The places of culture (archaeological areas, archaeological parks, museums, monuments, archives, libraries), like other built places, thanks to 6G technology and its flexibility, versatility, sustainability, reliability, will be able to become completely interconnected

Verso la tecnologia 6G per i luoghi della cultura

Considering the remarkable historical, artistic, monumental, demoethno-anthropological, archaeological, archival and national library heritage, in order to improve the management and safety of places of culture, it becomes essential to focus attention on the new 6G technology which will allow the fusion of digital world with the physical world capable of transmitting huge amounts of data and information in seconds. The places of culture (archaeological areas, archaeological parks, museums, monuments, archives, libraries), like other built places, thanks to 6G technology and its flexibility, versatility, sustainability, reliability, will be able to become completely interconnected

Verso la tecnologia 6G per i luoghi della cultura

Considering the remarkable historical, artistic, monumental, demoethno-anthropological, archaeological, archival and national library heritage, in order to improve the management and safety of places of culture, it becomes essential to focus attention on the new 6G technology which will allow the fusion of digital world with the physical world capable of transmitting huge amounts of data and information in seconds. The places of culture (archaeological areas, archaeological parks, museums, monuments, archives, libraries), like other built places, thanks to 6G technology and its flexibility, versatility, sustainability, reliability, will be able to become completely interconnected

Verso la tecnologia 6G per i luoghi della cultura

Considering the remarkable historical, artistic, monumental, demoethno- anthropological, archaeological, archival and national library heritage, in order to improve the management and safety of places of culture, it becomes essential to focus attention on the new 6G technology which will allow the fusion of digital world with the physical world capable of transmitting huge amounts of data and information in seconds. The places of culture (archaeological areas, archaeological parks, museums, monuments, archives, libraries), like other built places, thanks to 6G technology and its flexibility, versatility, sustainability, reliability, will be able to become completely interconnected