196,203 research outputs found
Spatially resolved NMR: MRI and single-sided profiles on samples treated with environmental safe fluorinated compounds to preserve Cultural Heritage porous media
No full textCas tératologiques chez les Mousses d'après Ugo Brizi
No full textDebat M. Cas tératologiques chez les Mousses d'après Ugo Brizi. In: Bulletin mensuel - Société botanique de Lyon, tome 11, bulletin 1, 1893. pp. 18-19
Exploiting the shadow information to increase the target detection performance in SAR images
No full textBrest, Franc
A Preliminary Study of a Conformal Electromagnetic Metasurface for Brain Tumor Detection
No full textWe introduce a radiofrequency system for brain tumor detection, where a conformal metasurface is employed, by opportunely modifying the classical planar structure. The proposed system, working at 3 MHz, consists in a 5×5 matrix whose unit-cells are made of 8-turn spirals, excited by an active RF coil placed in its near-field region. The detection of the tumors is carried out by observing the amplitude variation and the frequency shift of the driving coil input impedance. By performing accurate full-wave simulations, we demonstrated that, by designing the metasurface in order to produce a 5-spot magnetic field distribution, it is possible to detect and spatially identify brain tumor malignancies, despite the extremely low frequency herein adopted. The findings, obtained from accurate numerical simulations, suggest that the conformal near-field focused metasurface is able to detect inclusions as small as 1 mm, demonstrating excellent sensitivity and spatial resolution. Future studies and developments will be aimed at exploiting a real-time reconfigurability to sequentially scan the tissue or region of interest
La relazione tra la percezione dell’incertezza e la discriminazione degli immigrati: la religiosità intrinseca come un moderatore
No full textQuesto studio ha l’obiettivo di indagare la relazione tra la percezione dell’incertezza e la discriminazione degli immigrati, e di verificare il ruolo della religiosità come un potenziale moderatore tra l’incertezza e la discriminazione.
La religiosità e la spiritualità sono prerogative dell’essere umano di ogni epoca e di ogni cultura. Diversi studi hanno trovato che la religiosità può accrescere la prosocialità, la generosità, ma può anche alimentare atteggiamenti di ingroup bias e di discriminazione dell’outgroup. Allport (1954) ha cercato di spiegare queste contraddizioni con la distinzione tra religione intrinseca ed estrinseca. La religiosità intrinseca si riferisce alla spiritualità e alla ricerca di valori autentici. Abbiamo ipotizzato che la religiosità intrinseca può moderare la relazione tra la percezione dell’incertezza e la discriminazione, in modo di renderla meno forte.
La ricerca è stata effettuata su 181 partecipanti, tutti italiani, principalmente di orientamento cristiano-cattolico (76.2%) e d’età prevalentemente giovane (M = 24.8). I dati sono stati raccolti tramite un questionario.
I risultati confermano che le persone incerte tendono a maturare atteggiamenti di chiusura e discriminazione per l’outgroup. Inoltre, dai risultati emerge che la religiosità intrinseca modera la relazione tra la percezione dell’incertezza e la discriminazione degli immigrati. La discriminazione degli immigrati aumenta quando le persone sopravalutano il loro numero, ma solo quando si percepiscono come incerte e non religiose
Existence and nonexistence of positive radial solutions of a quasilinear Dirichlet problem with diffusion
No full textIn this paper existence and nonexistence results of positive radial solutions
of a Dirichlet -Laplacian problem with different weights and a diffusion
term inside the divergence of the form , with
and , positive functions satisfying natural growth
conditions, are proved. Precisely, we obtain a new critical exponent
, which extends the one relative to case with no
diffusion and it divides existence from nonexistence of positive radial
solutions. The results are obtained via several tools such as a suitable
modification of the celebrated blow up technique, Liouville type theorems, a
fixed point theorem and a Poho\v zaev-Pucci-Serrin type identity
Apoptotic-induced Effects of Castanea sativa Bark Extract in Human SH-SY5Y Neuroblastoma Cells
No full textCastanea sativa Mill. wood extract (ENC) has health-promoting qualities such as antibacterial, antiviral, antispasmodic, cardio- and neuroprotective-activities. Its potential towards cancer cells of the central nervous system, however, is still unexplored. This study investigates the apoptotic-enhancing effect of ENC in human neuroblastoma SH-SY5Y cell line. This extract irreversibly decreased cell viability with IC50 of 142.8 +/- 20.2, 109.3 +/- 16.6 and 82.5 +/- 8.6 mu/mL for 24h, 48 and 72h of treatment, respectively. This was accompanied by cell shrinkage and tendency to round-up. A concentration-dependent increase in sub GO/GI cells as well as a rise in cells with nuclear fragmentation and chromatin condensation, both typical of apoptosis, was also observed. In conclusion, the present findings provide initial data on the potential of ENC for neuroblastoma treatment and offer the rationale for further studies aimed at elucidating the full mechanism(s) underlying its effects
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