102,633 research outputs found
Graphene derived lanthanum carbide targets for the SPES ISOL facility
No full textGraphene derived lanthanum carbide targets for the SPES ISOL facility By:Corradetti, S (Corradetti, S.)[ 1 ] ; Carturan, SM (Carturan, S. M.)[ 1,2 ] ; Andrighetto, A (Andrighetto, A.)[ 1 ] ; Mariotto, G (Mariotto, G.)[ 3 ] ; Giarola, M (Giarola, M.)[ 3 ] ; Fabrizi, A (Fabrizi, A.)[ 4 ] ; Maddalena, A (Maddalena, A.)[ 5 ] ; Biasetto, L (Biasetto, L.)[ 1,4 ] CERAMICS INTERNATIONAL Volume: 43 Issue: 14 Pages: 10824-10831 DOI: 10.1016/j.ceramint.2017.05.106 Published: OCT 1 2017 View Journal Impact Abstract Lanthanum carbide based targets were produced as benchmark tests before the production of radioactive uranium carbide targets. Carbides possessing excess carbon and porosity seem to be the best candidates as target for the production of exotic beams in the SPES-ISOL facility. In addition, the capability of tailoring properties such as grains size and pores size represents a step ahead to improve the ions release efficiency. In this work, multilayered graphene was used as source of carbon for the production of LaC and the main physical properties of the produced targets were compared to standard LaCx produced using micrometric graphite. The main output of the work consisted in the reduced total porosity (28.8 vol% vs 47.8 vol%) and increased shrinkage (20.4 vol% vs 5.8 vol%) of the LaCx-Graphene samples compared to LaCx-Graphite ones. This result showed how graphene can be successfully employed as sintering aid for the sintering of carbides. Further studies are ongoing with UO2 as starting reagent for carburization within the project AUL-2013-16-176 "Study of the use of graphene as source of carbon for Uranium Carbide-Graphene nanocomposites production" now under conclusion at the European Commission DG Joint Research Centre - JRC
Effetto del sistema di ventilazione sull'ambiente, lo stato di salute e le performance in vitelloni in fase di ristallo
No full textDoes status affect intergroup perceptions of humanity?
No full textAcross three studies, we examined whether ingroup status may affect intergroup perceptions of humanity. In Studies 1 and 2, we considered real groups: Northern versus Southern Italians; in Study 3, we manipulated the socioeconomic status of two minimal groups. In all studies, members of higher status groups perceived the ingroup as more human than the outgroup, while members of lower status groups did not assign a privileged human status to the ingroup. Such findings were obtained using different implicit techniques: the Implicit Association Test (IAT) and the Go/No-go Association Task (GNAT). Further, results suggest that the different perceptions of humanity may depend on the stereotypic traits generally ascribed to higher and lower status groups. The implications of results for infrahumanization research are discussed. © The Author(s) 2012
Peer effects on compliance with extortive requests
No full textWe conduct laboratory experiments to study peer effects on compliance with extortive requests. To this aim, we use an “extortion game” with multiple victims. In agreement with our hypothesis, our results show that when the information on peers’ behavior is available, compliance with appropriative requests is triggered by conformism among victims rather than by punishment. Moreover, we find that extorted sums are rather small, requests are proportional to the victim’s earnings, similar across victims, and are significantly lower when the extorter self-selects into this role. Punishment is rare, but effective. Finally, our results indicate that fairness concerns matter even in a context of extra-legal taxation, shaping both extorters’ requests and victims’ compliance
An easy decision-making graphic tool to improve herd level milk yield in a local scale dairy farming system
No full textSeveral features prevent dairy farms from reaching their full potential milk yield levels. A plurality of methods are available to analyse a farm's yield gap, but in practice, farmers rarely use them to understand their main constraints to production. We propose a simple and graphical approach to tune the limiting (feed-related) or reducing (management-related) factors to evaluate the likelihood of being a high-yielding farm. We gathered data from 32 farms within a local-scale dairy system in Northern Italy. Data regarded milk yield (MY), dry matter intake (DMI), feeding ration's homogeneity index (Hi), feed sorting (Si) index, ration's geometric mean particle length (GMPL), ration digestibility, income over feed cost (IOFC) and MY summer-winter ratio (SWR). Farms were classified according to their MY levels into high (H) and low or medium (L + M), with a 36.7 kg x cow(-1) day(-1) threshold. At an ANOVA model for MY class, H farms resulted in higher IOFC (p < 0.001), GMPL (p = 0.046), DMI (p = 0.006), digestible DM (DDM, p = 0.013), digestible crude protein (DCP, p = 0.011), digestible starch (Dstarch, p = 0.001), and feed efficiency (FE, p = 0.003). At a logistic AIC stepwise regression, the GMPL (odds = 6.528, 95% CI = 1.11-64.2) and DMI (odds = 3.889, 95% CI = 1.43-16.5) favoured farms being classified in the H production class. The nomogram was used to calculate a confusion matrix, achieving an overall accuracy of 0.70, demonstrating its ability to transform predictive models into a graphical, realisable tool
Effect of Inoculants and Sealing Delay on the Fermentation Quality of Early Harvested Wheat Forage
No full textSimple Summary: Winter cereal silages are becoming a crucial component of dairy nutrition for Mediterranean countries, partially replacing maize silage even in high-producing cows. Concerns regarding the definition of their final quality and the potential for aerobic deterioration, leading to loss of dry matter, feed intake, and milk yield, need to be investigated. We evaluate the effect of different ensiling conditions, including the use of inoculants and freshly harvested plant composition, on the final silage quality, and the most relevant risk factors associated with the silage's aerobic deterioration. The dry matter at harvest affected the entire final silage quality, and acetic acid varies between the control (pure water) and the hetero-/homofermentative. The aerobic stability for all samples was 59.2 +/- 23.6 h without statistical differences within the thesis, ensuring a sufficient time for a convenient silo unload rate. Winter cereal silages can suffer from an inadequate fermentative path which can lead to aerobic instability. We evaluate the pre-ensiled conditions influencing the final fermentative quality and its aerobic stability. We studied the use of hetero/homofermentative inoculants on two early-harvest wheat samples (312 and 348 g/kg of dry matter-DM levels) undergoing three ensiling delays. The fermentative profiles were evaluated during the first ten d of ensiling, at 60 d and after 7 and 14 d of aerobic exposure. Aerobic stability was recorded during fourteen d after the silo opening. Significant (p < 0.05) differences of the final fermentative profile were related mainly to DM levels at harvest, while the use of the inoculant affected only the acetic acid significantly. Finally, the sealing delay did not significantly affect the silage fermentative profile. The overall aerobic stability was 59.2 +/- 23.6 h, and cumulative temperatures were lower than 438 for seven d of aerobic exposure and higher than 1526 for 14 d. Although the homofermentative inoculants reduced the counts of yeasts in the final silage for the earlier harvested wheat, the other samples showed yeasts counts of similar to 4.9 Log10 colony-forming units/g, with the presence of spoilage fungi (Pichia and Geotricum)
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