867 research outputs found
Il 'confiteor' di Alcesimarco (Plaut. Cist. 249)
No full textproposta di emendamento al v. 249 della Cistellaria di Plaut
Turba (turbare,turbidus, turbo)
No full textanalisi dell'uso virgiliano dei lessemi turba e corradicali (turbare, turbidus, turbo
Link between complex internal structures and stratigraphy: Xradia - ZEISS MicroXCT-400 of genus Sphaerogypsina Galloway 1933
No full textStudying the Earth's radiogenic power with geoneutrinos
No full textGeoneutrinos, antineutrinos originating from Earth’s natural radioactivity,
offer insights into the definition of the Earth’s heat budget. To date,
the KamLAND (Japan) and Borexino (Italy) experiments have both successfully
measured the geoneutrino flux. The information was merged to achieve a mantle
geoneutrino signal of 8.9+5.1−5.5 TNU and Earth’s radiogenic heat of 20.8+7.3−7.9 TW, consistent with the 19.7±3.1 TW estimated from geochemical Bulk Silicate Models.
Future geoneutrino research will involve multi-site mantle analysis, new
detectors (SNO+ and JUNO), and advancements in experimental techniques,
such as detecting antineutrino directionality and potassium geoneutrinos
Sull’idoneità dei materiali lapidei reperibili in Basilicata per strati superficiali di pavimentazioni stradali
No full textLa presente memoria, a seguito di un’accurata indagine sperimentale condotta sugli aggregati lapidei disponibili nel territorio Lucano, vuol fornire utili indicazioni per poter programmare razionalmente gli interventi mirati alla realizzazione di strati superficiali in conglomerato bituminoso, sfruttando al meglio le risorse locali. A seguito di elaborazione statistica delle risultanze sperimentali vengono inoltre proposte delle correlazioni analitiche tra i diversi metodi di prova impiegati, pervenendo in ultimo alla redazione di mappe di reperibilità ed impiego dei materiali lapidei per strati di usura e binder
On the arrangement of a small scale field experiment of a spar-type support for offshore wind turbine
No full textThe aim of this work is to investigate the dynamic behavior of a spar-type support for offshore wind turbines under the action of irregular waves in ultimate design conditions. The structure chosen is the U-Maine Hywind Spar Buoy, supporting the NREL 5MW turbine. A 1:30 scale field experiment is arranged, exploiting the unique characteristics of the Natural Ocean Engineering Laboratory (NOEL) of Reggio Calabria (Italy), which uses the occurring real sea states as scale models of severe ocean storms. The design of the model has been made in order to reproduce the prototype mass and geometrical properties and to assure its structural resistance to the local extreme conditions. Numerical analysis have been carried out, using the commercial code AQWA, to obtain RAOs, platform motion and tensions on the catenary mooring lines, in order to verify the design of the model and to be compared to the experimental results
Benthic litter in fishing grounds of the Northern Adriatic: Role of the trawling fleet as cleaners of the seafloor
No full textThis study represents the baseline of estimation of the potential service provided by fishermen as “cleaners of the sea”. The amount, composition and depth distribution of marine litter in fishing grounds of the Northern Adriatic seafloor has been investigated through the fishing for litter (FFL) scheme. Passive FFL campaigns were carried out by trawlers from two of the most important fishing ports in the northern Adriatic, Chioggia and Goro, from May 2020 to May 2021. Over the course of 256 days of fishing, over 6 tons of litter were removed from 265 km2 of seafloor. Abandoned, lost and derelict fishing gears (ALDFG) were the most represented litter category (48 % of the total litter), and of these 67 % were plastic ALDFG (mostly mussel socks and fishing nets). Fouling on plastic waste was analyzed to determine the fraction of collected litter items that could be destinated to recycling. Only a small percentage of the plastic litter analyzed was “clean” from adherent and/or encrusting organisms. Approximately 2.4 tons of plastic were recovered, but, due to the biological colonization of surfaces, they cannot be recycled by using the technologies present in the area
Geoneutrinos from the rock overburden at SNO+
No full textSNOLAB is one of the deepest underground laboratory in the world with an overburden of 2092 m. The SNO+ detector is designed to achieve several fundamental physics goals as a low-background experiment, particularly measuring the Earth's geoneutrino flux. Here we evaluate the effect of the 2 km overburden on the predicted crustal geoneutrino signal at SNO+. A refined 3D model of the 50 χ 50 km upper crust surrounding the detector and a full calculation of survival probability are used to model the U and Th geoneutrino signal. Comparing this signal with that obtained by placing SNO+ at sea level, we highlight a 1.4+1.8-0.9 TNU signal difference, corresponding to the ∼5% of the total crustal contribution. Finally, the impact of the additional crust extending from sea level up to ∼300 m was estimated
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