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Girth and groomed radius of jets recoiling against isolated photons in lead-lead and proton-proton collisions at sqrt(s_NN) = 5.02 TeV
No full textThis Letter presents the first measurements of the groomed jet radius Rg and the jet girth g in events with an isolated photon recoiling against a jet in lead-lead (PbPb) and proton-proton (pp) collisions at the LHC at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The observables Rg and g provide a quantitative measure of how narrow or broad a jet is. The analysis uses PbPb and pp data samples with integrated luminosities of 1.7 nb−1 and 301 pb−1, respectively, collected with the CMS experiment in 2018 and 2017. Events are required to have a photon with transverse momentum pTγ>100 GeV and at least one jet back-to-back in azimuth with respect to the photon and with transverse momentum pTjet such that pTjet/pTγ>0.4. The measured Rg and g distributions are unfolded to the particle level, which facilitates the comparison between the PbPb and pp results and with theoretical predictions. It is found that jets with pTjet/pTγ>0.8, i.e., those that closely balance the photon pTγ, are narrower in PbPb than in pp collisions. Relaxing the selection to include jets with pTjet/pTγ>0.4 reduces the narrowing of the angular structure of jets in PbPb relative to the pp reference. This shows that selection bias effects associated with jet energy loss play an important role in the interpretation of jet substructure measurements
Utilization of waste tire and rubber from automobiles in the manufacturing of particleboards and evaluation of its properties
Get PDFThe objective of this work was to investigate the selected properties of particleboard (PB) containing waste rubber – a mixture of carpets and isolators (GWR) and tires (GWT) from discarded automobiles. Mechanical (tensile strength (IB), bending strength (BS), physical (water absorption (WA), thickness swelling (TS) after 2 and 24 h of immersion), chemical (volatile compounds - VOC using GC-MS method), thermo-physical (thermal conductivity and diffusivity, specific heat capacity) and sound absorption coefficient were analyzed. In addition, a density profile and microscopic analysis of the particleboards were performed. The addition of 10% rubber to the PB either maintains the IB or improves the BS of the composite. The best results for WA after 24 h (97.94%) and TS after 24 h (30.74%) were achieved for composites containing tire granulates. For this reason, these PBs are the most suitable for utilization in areas with higher humidity. Adding 20% of GWR to PB decreased the total content of VOC emissions by 85% so it can be stated that the rubber probably acts as a VOC sorbent. Control PBs had significantly lower thermal conductivity and diffusivity, and comparable specific heat capacity values than PBs containing GWR and GWT. The best sound insulation properties were obtained for PBs containing 20% of GWR. Microscopic analysis pointed to greater GWT and GWR contents resulting in higher C content in the PB. All PBs containing GWR have a higher mean density compared to that of control, ranging from 597 kg·m−3 to 615 kg·m−3. On the other hand, PB containing GWT had comparable or lower density values
Measurement of the double-differential inclusive jet cross section in proton-proton collisions at sqrt(s) = 5.02 TeV
No full textThe inclusive jet cross section is measured as a function of jet transverse momentum pT and rapidity y. The measurement is performed using proton-proton collision data at s = 5.02 TeV, recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 27.4 pb−1. The jets are reconstructed with the anti-kT algorithm using a distance parameter of R = 0.4, within the rapidity interval |y| < 2, and across the kinematic range 0.06 < pT< 1 TeV. The jet cross section is unfolded from detector to particle level using the determined jet response and resolution. The results are compared to predictions of perturbative quantum chromodynamics, calculated at both next-to-leading order and next-to-next-to-leading order. The predictions are corrected for nonperturbative effects, and presented for a variety of parton distribution functions and choices of the renormalization/factorization scales and the strong coupling αS
Urban and Cultural Policies. Matera and New Heritage Processes for Urban Regeneration
No full textUrban culture can once again become an
instrument of city transformation thanks to
the tourist attractiveness of cities of culture,
after cultural policies have avoided that ancillary
and passive role attributed by city governments
justifying the increasingly stunted
funding for reasons of economic crisis.
However, the risks of relying only on actions
capable of activating economic processes palatable
to the entrepreneurial system are now
emerging, to the benefit of real estate rent,
operating within a logic more of patronage
than of activating creative entrepreneurship by
pushing public and private investment mainly
in the direction of the event often subservient
to financial logics. Our idea is that the cultural
event of Matera European Capital of Culture
2019, in light of the transformations that
occurred during its journey from the candidacy
to the proclamation of European Capital
of Culture 2019, has interpreted the cultural
process as a policy of urban regeneration by
trying to question how urban planning can
become regenerative through a cultural policy
The Relationships Between Climate and Growth in Six Tree Species Align with Their Hydrological Niches
Get PDFUnderstanding how regional and local climate variability drive radial growth in trees is necessary to assess the climate-warming mitigation potential of forests. However, tree species occurring in the same region differently respond to climate variability, including climate extremes such as droughts, depending on soil–moisture gradients (hydrological niche). We analyzed a tree-ring network built in a mountainous area (Sierra de Gredos, central Spain) to compare climate–growth responses between species and sites located along soil–moisture gradients. Tree-ring methods were applied to six tree species, and sampled in twelve sites, including conifers (Pinus pinaster) and broadleaves (Quercus pyrenaica, Quercus robur, Quercus ilex, Celtis australis, and Prunus lusitanica). Series of growth indices were correlated with climate variables and climate indices (NAO, North Atlantic Oscillation). The radial growth of most species was enhanced by high growing-season precipitation, linked to negative NAO phases. The influence of precipitation on growth variability strengthened as site elevation decreased, particularly in the case of C. australis and oak species. The topographical modulation of climate–growth couplings indicates that the hydrological niche drives species responses to water shortage. Tree-ring data could be used to refine time-dependent hydrological niches
Woody Biochar Differently Influences Plant Water Status and Growth of Five Quinoa (Chenopodium Quinoa Willd.) Varieties Under Water Stress
Get PDFOnly few studies have evaluated the responses of quinoa varieties to biochar amendment under water-limited conditions during the early growth stages. We examined the interaction between soil treated with and without biochar and water stress applied during the vegetative development on water relation and growth of quinoa varieties. Five varieties (Titicaca, Quipu, Regalona, UAFQ7, and Q126) were grown in soil without and with 2% (w/w) woodchip biochar and subjected to two successive water stress cycles, by withholding water until soil reached the permanent wilting point, started from 12-leaf stage. The morpho-physiological attributes, leaf nutrients and total bacterial count were assessed during the experiment. Biochar significantly improved plant growth, water use efficiency (WUE), and yield-related traits across all varieties under water-stressed conditions. Biochar under water-limited conditions enhanced plant water status, indicated by lower pre-dawn water potential and increased relative water content compared to non-treated soil. The UAFQ7 showed superior growth with biochar, producing more leaves and larger leaf areas (1517 vs. 1378 cm(2)/plant). Titicaca was more sensitive to drought, with a considerable reduction in leaf area (1268 vs. 1386 cm(2)/plant), fresh and dry biomass (6.4 vs. 7.4 g) compared to well-watered conditions. Quipu produced longer panicles, further enhanced by biochar (17 vs. 12 cm). A significant increase of 17% in WUE was observed in biochar-treated plants compared to non-amended ones. Woodchip biochar seems to mitigate the adverse effects of water stress in quinoa, but the responses vary among varieties
DIGIT-ACCESS: DIGITal Gateway for Low ACCESSible Heritage Architectures
No full textThe preservation of historical built heritage with low accessibility involves specific challenges throughout preliminary knowledge acquisition and diagnosis, due to operational difficulties in collecting and complementing heterogeneous data from direct survey, diagnostic investigation and monitoring. In this context, digital solutions, also usable in Virtual Reality (VR) and Augmented Reality (AR) environments, are catalysts for a new vision that enhances understanding of the geometric, dimensional, and material characteristics, while facilitating semantic enrichment with informative contents and products and real-time retrieval of data from onsite monitoring sensors. In this framework, the paper presents the two-year project “DIGIT-ACCESS. DIGITal gateway for low ACCESSible heritage architectures”, recently funded by the Italian Ministry of University and Research—Grant Program PRIN 2022 PNRR (Projects of Relevant National Interest). The project aims at testing and validating a set of operational protocols and digital solutions for the exploitation of image-based models and environments as replicas of architectural sites to be accessed remotely, hubs for visualization and querying of experimental data from non-destructive investigations, sensor networks, and analytical simulations, as well as databases for the application of image-processing routines and machine-learning methods toward identification of degradation patterns and diagnosis of the state of conservation. The proposed outcome is a DIGITal gateway to support assessment and management of low ACCESSible architectures, to be validated in representative case studies of underground sites in Southern Italy
Insight the lithiation process of Micro and Nanoparticles TiO2-Anatase based electrodes
No full textTiO2Size-dependent electrochemical propertiesFaradic and capacitive mechanismNegative electrode for lithium batterisoperando Raman spectroscop
