904 research outputs found
COSMO-SkyMed polarimetric data for soil moisture retrieval: capability of SAR data for landslides monitoring
No full textL'obiettivo principale della Tesi di Dottorato è stato quello di individuare una nuova applicazione per la seconda
generazione della costellazione COSMO-SkyMed. La scelta è ricaduta sullo studio di frane causate da forti piogge.
Il parametro fondamentale in questo campo è l’umidità del suolo, ed è stato implementato un algoritmo a partire dal
modello di Dubois, che consenta la stima di tale parametro da immagini SAR polarimetriche. La tesi è stata sviluppata con finanziamento e in collaborazione con l'Agenzia Spaziale Italiana (ASI).
Le metodologie sviluppate sono state teoriche e sperimentali/numeriche
LA FORMA DELLA POESIA ONPHALÒS DELLO SPAZIO E DEL TEMPO. LA ROSA DEL PUNTO DI GIOVANNI DOTOLI
No full textTourism and Social Networks: Sicily brand image diffusion through electronic word of mouth (EWOM) on Facebook
No full textElectronic word of mouth (eWOM) in tourism
No full textThis paper is based on the idea that user generated contents (UGC) about holidays, travels and destinations, widely propagated throughout modern social networks, have a topical relevance respect to the diffusion of the image of tourist destinations.
More than other information transmission mechanisms, word of mouth (WOM) strongly influences consumer behavior and decision-making, especially when ‘experience goods’ (as in the case of tourism) difficult to be evaluated before their consumption are concerned (Wilson 1994; Griffin 1995; Silverman 1997; Rosen 2002; Dall’Ara, 2002; Lambin, 2004).
The advances of ICT tools and the emergence of the Internet strongly influence word of mouth, since larger and larger WOM networks are being settled where travelers’ and tourist services contents are simultaneously diffused.
In the paper the features of the so-called electronic word of mouth (e-WOM) will be discussed in terms of the web transmission of the free users generated contents (UGC)
Working memory performance and thalamus microstructure in healthy subjects
No full textResearch on the neural basis of working memory (WM) has generally focused on cortical regions, specifically frontal and parietal areas. Comparatively, evidence of a possible involvement of deep gray matter structures, that are parts of cortico-cortical circuits linking anterior and posterior cortical areas, is far less clear. The goal of the present study is to test the hypothesis that individual structural variations within deep gray matter structures may affect the cortical networks involved in WM. To this aim, a large sample (n=181) of healthy subjects underwent a high-resolution structural magnetic resonance imaging (MRI) and a diffusion tensor imaging (DTI) scan protocol. Data of micro- (mean diffusivity, MD) and macro- (volume) structural variations of six bilateral deep gray matter structures (thalamus, caudate nucleus, putamen, hippocampus, amygdala and pallidum) and lateral ventriculi volume were analyzed in association with score in a WM (the so-called n-back task) and other neuropsychological tasks. Results showed that increased MD of bilateral thalami was the only structural parameter that significantly correlated with reduced WM performance. In particular, a voxel-by-voxel analysis revealed that the greater percentage of voxels showing significant anticorrelation between WM score and MD values were localized in those thalamic nuclei projecting to prefrontal and posterior parietal cortices. Results highlight the specific involvement of thalamus microstructure, not volume, in modulating WM performance, possibly by regulating the connections among cortical areas that are recruited during WM tasks
Milano o “Le isole fortunate” Lettura di Ascolto il tuo cuore, città di Alberto Savinio
No full textBrain connectivity changes after osteopathic manipulative treatment: A randomized manual placebo-controlled trial
No full textThe effects of osteopathic manipulative treatment (OMT) on functional brain connectivity in healthy adults is missing in the literature. To make up for this lack, we applied advanced network analysis methods to analyze resting state functional magnetic resonance imaging (fMRI) data, after OMT and Placebo treatment (P) in 30 healthy asymptomatic young participants randomized into OMT and placebo groups (OMTg; Pg). fMRI brain activity measures, performed before (T0), immediately after (T1) and three days after (T2) OMT or P were used for inferring treatment effects on brain circuit functional organization. Repeated measures ANOVA and post-hoc analysis demonstrated that Right Precentral Gyrus (F (2, 32) = 5.995, p < 0.005) was more influential over the information flow immediately after the OMT, while decreased betweenness centrality in Left Caudate (F (2, 32) = 6.496, p < 0.005) was observable three days after. Clustering coefficient showed a distinct time-point and group effect. At T1, reduced neighborhood connectivity was observed after OMT in the Left Amygdala (L-Amyg) (F(2, 32) = 7.269, p < 0.005) and Left Middle Temporal Gyrus (F(2, 32) = 6.452, p < 0.005), whereas at T2 the L-Amyg and Vermis-III (F(2, 32) = 6.772, p < 0.005) increased functional interactions. Data demonstrated functional connectivity re-arrangement after OMT
- …
