1,721,412 research outputs found
Caputo (G.) et Traversari (G.). Le sculture del teatro di Leptis Magna
No full textDebergh Jacques. Caputo (G.) et Traversari (G.). Le sculture del teatro di Leptis Magna. In: Revue belge de philologie et d'histoire, tome 58, fasc. 4, 1980. Histoire (depuis l'Antiquité) - Geschiedenis (sedert de Oudheid) p. 1007
Caputo (G.) et Traversari (G.). Le sculture del teatro di Leptis Magna
No full textDebergh Jacques. Caputo (G.) et Traversari (G.). Le sculture del teatro di Leptis Magna. In: Revue belge de philologie et d'histoire, tome 58, fasc. 4, 1980. Histoire (depuis l'Antiquité) - Geschiedenis (sedert de Oudheid) p. 1007
Behaviour and mean life prediction of solar mirrors from parabolic trough collectors under accelerated degradation/reliability testing
No full textThe scope of this paper is focuses on the study of the mean life of materials (solar mirrors from parabolic - trough collectors) from the field of renewable energies, using accelerated degradation/reliability testing. This paper is focused on influence of environmental factors (temperature, humidity, UV and salt spray) at mean life of solar mirrors from parabolic - trough collectors under accelerated testing conditions. In today’s highly competitive environment, companies are pressured to shorten their development cycles, reduce development costs and produce highly reliable products. Accelerated reliability/durability tests are a very powerful tool in achieving these goals, providing the means to observe failures more rapidly under higher-stress operating conditions while accurately predicting reliability under normal operating conditions
Solar steam reforming for enriched methane production: Reactor configurations modeling and comparison
No full textA solar low-temperature steam reforming process for the production of an Enriched Methane (EM) mixture composed by CH4 and H2 (20%vol) exploiting the solar energy stored in a Molten Salt stream heated up by a Concentrating Solar Plant (MS-CSP) is presented and simulated through a two-dimensional steam reforming reactor model. Two configurations are considered and compared: the Integrated Heat Exchanging (IHE) configuration, where the steam reformers are tubes-and-shell reactors continuously heated up by the hot MS stream, and the External Heat Exchanging (EHE) configuration composed by a series of heat exchangers and insulated reformers where the reactions are adiabatically driven. The effect of the main operating conditions as Gas Hourly Space Velocity (GHSV), inlet reactor temperature and reactant mixture composition is assessed for both the configurations, demonstrating the process feasibility. Furthermore, in order to increase the process performance, an electrical power generation unit is also included, exploiting the sensible heat of the residual MS stream after the EM production unit: in this case, with a feed of 2000 Nm3/h of natural gas, about 6130 Nm3/h of enriched methane and 475 kWel are produced with the EHE configuration, while 3720 Nm3/h and 585 kWel are obtained with IHE configuration. © 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved
Strange-face illusions during eye-to-eye gazing in dyads: specific effects on derealization, depersonalization and dissociative identity
Full text linkExperimentally induced strange-face illusions can be perceived
when two individuals look at each other in the eyes under low
illumination for about 10 minutes. This task of subject-other eyeto-eye
gazing produces the following perceptions by the subject:
(i) mild to huge deformations and color/shape changes of
face and facial features; (ii) lifeless, unmoving faces and immaterial
presences akin to out-of-body experiences; (iii) pseudohallucinations,
enlightened ‘idealized’ faces and personalities –
rather than the other’s actual face. Dissociative phenomena
seem to be involved, whereas the effects of non-pathological
dissociation on strange-face illusions have not yet been directly
investigated. In the present study, dissociative perceptions and
strange-face illusions were measured through self-report questionnaires
on a large sample (N = 90) of healthy young individuals.
Results of correlation and factor analyses suggest that
strange-face illusions can involve, respectively: (i) strange-face
illusions correlated to derealization; (ii) strange-face illusions
correlated to depersonalization; and (iii) strange-face illusions
of identity, which are supposedly correlated to identity dissociation.
The findings support the separation between detachment
and compartmentalization in dissociative processes. Effects of
gender show that strange-face illusions are more frequent in
men with respect to women if dyads are composed of individuals
of different-gender. Furthermore, drawings of strangefaces,
which were perceived by portrait artists in place the
others’ faces, allowed a direct illustration of examples of dissociative
identities. Findings are discussed in relation to the three level
model of self-referential processing
A visual evoked potential correlate of global figure-ground segmentation
Full text linkAbstract: Human observers discriminated the global orientation of a texture-defined figure which segregated from a texture surround. Global figure discriminability was manipulated through within-figure collinearity, figure-surround interaction, and figure connectedness, while the local orientation contrast at edges between figure and surround was kept constant throughout all the experiments. Visual evoked potentials (VEPs) were recorded during onset-offset stimulation in which the figure cyclically appeared and disappeared from a uniform texture background. A difference component was obtained by subtraction of offset-from onset-VEP. Two negative peaks of the difference component are found with latencies around 140-160 and 200-260 ms, respectively. Enhanced discriminability of the global figure reduced (11-25 ms) the latency of the second peak, hence indicating that the 200-260 ms component was produced by global figure-ground segmentation. (C) 1999 Elsevier Science Ltd. All rights reserved
Morfologie e depositi pleistocenici lungo le falesie carbonatiche di Monte Catalfano (Sicilia settentrionale)
No full textMechanical properties and corrosion behaviour of 316l stainless steel honeycomb cellular cores manufactured by selective laser melting
No full textSelective laser technology is an additive technology that can allow for the manufacture of cellular structures using different types of metallic powder with complex applications in industries such as aerospace, automotive and medical implant industries. This paper presents the effect of climate and mechanical stresses on some honeycomb cellular cores, used in sandwich structures made of 316L stainless steel powder by applying the selective laser melting technology. The honeycomb cellular cores have undergone the microhardness testing and the resulting variation obtained from the analyzed samples was 225 ± 15 HV0.3. The compressive strength and the modulus of elasticity of the cellular structures were determined for flatwise and edgewise compressive stresses. Also, the cellular structures were subjected to accelerated corrosion tests in order to determine their mean life in application use conditions similar to those near seas and oceans. Also, a microstructural evaluation of salt deposits was carried out on the cellular structures subjected to accelerated corrosion tests using a salt spray test chamber. © 2017 Transactions of Famena. All Rights Reserved
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