Social Commerce in the Wine Sector: An Exploratory Research Study of the Italian Market

The development of Web 2.0 technologies and social media, along with the emergence of wikis, blogs, online communities, and social networks, has rapidly transformed e-commerce. This phenomenon is commonly known as social commerce, an evolution of e-commerce characterized by a strong customer orientation. The aim of this paper is to understand the support of social commerce for e-commerce. We conducted an exploratory analysis of the Italian wine market via in-depth interviews with experts in the wine business: three wine producers and three companies running an online wine business. The interviews were recorded with the consent of the interviewees and transcribed, and their content was analyzed through content analysis. In particular, an analysis grid was created, following a closed procedure, with an ex-ante definition of the categories of analysis. Our results reveal that the COVID-19 outbreak has given a significant boost to digital transformation and online purchases in the wine sector. While some operators in the sector have merely undergone this change, others have been riding the wave, trying to benefit from it

On how mild oxidation affects the structure of carbons: Comparative analysis by different techniques

Abstract Understanding how the structure of carbonaceous materials changes upon oxidation at mild temperature as a function of the graphitic order is of great importance for the development of clean combustion technologies, such as carbon fuel cells. The micro- and nanostructures of a range of carbon materials at room temperature and upon mild oxidation at 300 °C have been analysed by means of mercury porosimetry, Nitrogen adsorption, X-Ray Diffraction, Raman spectroscopy and Electron Paramagnetic Resonance. The samples included carbons with increasing level of graphitic order: three chars derived from two bituminous coals and a lignite, a synthetic carbon and a graphitized coke. The experimental characterization allows to classify the materials according to different structural parameters, including porosity, surface area, degree of graphitization and paramagnetic activation of the carbonaceous surface. A correlation with the rank of the analysed materials is observed. For the graphitized coke, oxidation leads to more crystalline order and enhancement of the paramagnetic signal. A similar increase in the paramagnetic activity is observed for the Lignite char. On the other hand, for the higher rank, bituminous and synthetic chars, mild oxidation leads to a slight expansion of the amorphous carbon and loss of paramagnetic activity. The differences are rationalized in terms of formation of new carbon-oxygen complexes on the graphitized coke and on the Lignite char, and redistribution of already existing complexes for the higher-rank coals. This investigation complements previous X-ray photoelectron spectroscopy measurements

Azimuthal anisotropy of charged jet production in root s(NN)=2.76 TeV Pb-Pb collisions

We present measurements of the azimuthal dependence of charged jet production in central and semi-central root s(NN) = 2.76 TeV Pb-Pb collisions with respect to the second harmonic event plane, quantified as nu(ch)(2) (jet). Jet finding is performed employing the anti-k(T) algorithm with a resolution parameter R = 0.2 using charged tracks from the ALICE tracking system. The contribution of the azimuthal anisotropy of the underlying event is taken into account event-by-event. The remaining (statistical) region-to-region fluctuations are removed on an ensemble basis by unfolding the jet spectra for different event plane orientations independently. Significant non-zero nu(ch)(2) (jet) is observed in semi-central collisions (30-50% centrality) for 20 <p(T)(ch) (jet) <90 GeV/c. The azimuthal dependence of the charged jet production is similar to the dependence observed for jets comprising both charged and neutral fragments, and compatible with measurements of the nu(2) of single charged particles at high p(T). Good agreement between the data and predictions from JEWEL, an event generator simulating parton shower evolution in the presence of a dense QCD medium, is found in semi-central collisions. (C) 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).Peer reviewe

Production of He-4 and (4) in Pb-Pb collisions at root(NN)-N-S=2.76 TeV at the LHC

Results on the production of He-4 and (4) nuclei in Pb-Pb collisions at root(NN)-N-S = 2.76 TeV in the rapidity range vertical bar y vertical bar <1, using the ALICE detector, are presented in this paper. The rapidity densities corresponding to 0-10% central events are found to be dN/dy4(He) = (0.8 +/- 0.4 (stat) +/- 0.3 (syst)) x 10(-6) and dN/dy4 = (1.1 +/- 0.4 (stat) +/- 0.2 (syst)) x 10(-6), respectively. This is in agreement with the statistical thermal model expectation assuming the same chemical freeze-out temperature (T-chem = 156 MeV) as for light hadrons. The measured ratio of (4)/He-4 is 1.4 +/- 0.8 (stat) +/- 0.5 (syst). (C) 2018 Published by Elsevier B.V.Peer reviewe

Forward-central two-particle correlations in p-Pb collisions at root s(NN)=5.02 TeV

Two-particle angular correlations between trigger particles in the forward pseudorapidity range (2.5 2GeV/c. (C) 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B. V.Peer reviewe

Event-shape engineering for inclusive spectra and elliptic flow in Pb-Pb collisions at root(NN)-N-S=2.76 TeV

Peer reviewe

Search for eccentric black hole coalescences during the third observing run of LIGO and Virgo

Despite the growing number of confident binary black hole coalescences observed through gravitational waves so far, the astrophysical origin of these binaries remains uncertain. Orbital eccentricity is one of the clearest tracers of binary formation channels. Identifying binary eccentricity, however, remains challenging due to the limited availability of gravitational waveforms that include effects of eccentricity. Here, we present observational results for a waveform-independent search sensitive to eccentric black hole coalescences, covering the third observing run (O3) of the LIGO and Virgo detectors. We identified no new high-significance candidates beyond those that were already identified with searches focusing on quasi-circular binaries. We determine the sensitivity of our search to high-mass (total mass M&gt;70 M⊙) binaries covering eccentricities up to 0.3 at 15 Hz orbital frequency, and use this to compare model predictions to search results. Assuming all detections are indeed quasi-circular, for our fiducial population model, we place an upper limit for the merger rate density of high-mass binaries with eccentricities 0&lt;e≤0.3 at 0.33 Gpc−3 yr−1 at 90\% confidence level