Archivio Istituzionale della Ricerca- Università del Salento
Not a member yet
80217 research outputs found
Sort by
Sustainable Organic Phase Change Materials for Sustainable Energy Efficiency Solutions
Get PDFThe growing demand for sustainable energy solutions has intensified research on phase change materials (PCMs) due to their ability to efficiently store and release thermal energy. However, traditional PCMs are often made from petroleum-derived materials or rely on processes that pose environmental concerns. The aim of this work is therefore to explore the development and use of sustainable organic PCMs, in particular those based on bio-based or waste-derived materials. Bio-based PCMs, including fatty acids, natural waxes, and biopolymers, are in fact characterized by renewability and biodegradability. Waste-derived PCMs, such as those from the lost-wax casting industry and industrial by-products, offer an environmentally friendly approach to energy storage by reusing waste materials. This paper aims to analyze the thermal, mechanical, and in-service performance of these sustainable materials, highlighting their advantages and limitations compared to the most widely used commercial PCMs. Furthermore, recent progress in the integration of sustainable PCMs into building materials is illustrated to assess their practical implementation. Challenges and limitations, as well as possible solutions and future research directions, are also discussed
Constraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in pp collisions at sqrt(s) = 13 TeV with the ATLAS detector
Get PDFThis Letter presents a constraint on the total width of the Higgs boson (GammaH) using a combined measurement of on-shell Higgs boson production and the production of four top quarks, which involves contributions from off-shell Higgs boson-mediated processes. This method relies on the assumption that the tree-level Higgs-top Yukawa coupling strength is the same for on-shell and off-shell Higgs boson production processes, thereby avoiding any assumptions about the relationship between on-shell and off-shell gluon fusion Higgs production rates, which were central to previous measurements. The result is based on up to 140 fb-1 of proton–proton collisions at a centre-of-mass energy of sqrt(s) = 13 TeV collected with the ATLAS detector at the Large Hadron Collider. The observed (expected) 95% confidence level upper limit on GammaH is 450 MeV (75 MeV). Additionally, considering the constraint on the Higgs-top Yukawa coupling from loop-induced Higgs boson production and decay processes further yields an observed (expected) upper limit of 160 MeV (55 MeV)
Chemical composition of essential oils from Smyrnium olusatrum L. (Apiaceae) ecotypes from Salento
No full textFortNet Project: a longue durée approach to the study of settlement, economic and defensive systems in coastal Chaonia (Albania)
No full textThis short paper presents an overview of the methodology, fieldwork and activities of the FortNet Project, a joint collaborative effort of the University of Bologna and Sapienza University of Rome. Aiming to fill gaps in the research of hill-fort settlements in southern Albania, the project utilises cutting-edge methodologies to investigate settlement patterns, construction techniques, and material culture from the Bronze Age to the medieval period. Through non-invasive techniques and the development of a shared geo-database, FortNet contributes to the preservation and sustainable development of the region’s cultural heritage while fostering public engagement and academic exchange
Editorial: Exploring Pollen Microbiome: Implications for Plant Physiology, Crop Improvement and Human Allergies
No full textThree-dimensional homogeneous Lorentzian structures
Get PDFWe completely classify homogeneous structures on all non-symmetric three-dimensional Lorentzian Lie groups. Differently from the Riemannian case, non-canonical homogeneous structures also arise in some cases not corresponding to naturally reductive spaces
(Ri)allestimenti e omissioni bizantine in Puglia. L'intricata storia del Museo Nicolaiano e qualche riflessione su altri musei a Bari e nel Salento
No full textAzimuthal anisotropies of charged particles with high transverse momentum in Pb+Pb collisions at sqrt(sNN)=5.02 TeV with the ATLAS detector
No full textA measurement is presented of elliptic (v2) and triangular (v3) azimuthal anisotropy coefficients for charged particles produced in Pb+Pb collisions at sqrt(sNN) = 5.02 TeV using a dataset corresponding to an integrated luminosity of 0.44nb-1 collected with the ATLAS detector at the LHC in 2018. The values of v2 and v3 are measured for charged particles over a wide range of transverse momentum (pT), 1-400 GeV, and Pb+Pb collision centrality, 0-60%, using the scalar-product and multiparticle cumulant methods. These methods are sensitive to event-by-event fluctuations and nonflow effects in the measurements of azimuthal anisotropies. Positive values of v2 are observed up to a pT of approximately 100 GeV from both methods across all centrality intervals. Positive values of v3 are observed up to approximately 25 GeV using both methods, though the application of the three-subevent technique to the multiparticle cumulant method leads to significant changes at the highest pT. At high pT (pT>10 GeV), charged particles are dominantly from jet fragmentation. These jets, and hence the measurements presented here, are sensitive to the path-length dependence of parton energy loss in the quark-gluon plasma produced in Pb+Pb collisions