8,080 research outputs found
Principi di scienza economica : introduzione allo studio dell'economia politica, i principii dell'economia individuale, i principii dell'economia sociale / Ghino Valenti. - 2. ed. corretta ed accresciuta
No full textPrincipi di scienza economica : introduzione allo studio dell'economia politica, i principii dell'economia individuale, i principii dell'economia sociale / Ghino Valenti. - 2. ed. corretta ed accresciuta
Firenze : G. Barbèra, 1909
XXXVIII, 527 p. ; 17 cm
Group algebras whith symmetric units satisfying a group identity
No full textWe study group algebras FG for which the symmetric units under the natural
involution: g∗ = g−1 satisfy a group identity. For infinite fields F of characteristic ≠ 2, a
classification of torsion groups G whose symmetric units) satisfy a group identity
was given by Giambruno-Sehgal-Valenti. We extend this work to non torsion groups
Teatro, informazione e controinformazione
No full textL’intervento di Cristina Valenti identifica il teatro d'informazione italiano di attori-narratori come Paolini, Curino e Baliani con un “Teatro di impegno civile”, che si inventa ogni volta lavorando su testi originali che non appartengono a un repertorio; un teatro che evita di divenire inchiesta giornalistica e assumere su di sé un’autorità che non gli compete. L’autrice sottolinea inoltre l’obiettivo del “Teatro di impegno civile” di formare il pubblico attraverso il racconto teatrale a differenza di quanto avveniva con il teatro politico degli anni Sessanta e Settanta, teso a proporre allo spettatore una controinformazione
Transient dynamics in driven long Josephson junctions.
No full textThe switching time from the superconductive metastable state of a long Josephson junction (LJJ)[1] is computationally analyzed in the framework of the perturbed sine-Gordon equation. The model includes an external bias current term and a stochastic noise source, i.e. a Lévy noise term. The effects of this noise on the mean escape time (MET) from the superconductive state are analyzed. The investigation is performed by considering a wide range of values of system parameters and different noise statistics: Gaussian, Cauchy-Lorentz and Lévy-Smirnov[2].
We found evidence of well known noise induced phenomena on the MET behavior, that is the noise enhanced stability (NES) and resonant activation (RA). Furthermore, the action of the noise source and oscillating bias current on the soliton motion[3] is deeply analyzed.
Finally, we take into account a different, more realistic, bias current configuration, by considering an inhomogeneous current density through the junction. Differences in the soliton dynamics are also found in this case.
1. G. Augello, D. Valenti, and B. Spagnolo, Eur. Phys. J. B 70, 145 (2009).
2. G. Augello, D. Valenti, and B. Spagnolo, Eur. Phys. J. B 78, 225 (2010).
3. A. V. Ustinov, Physica D 123, 315 (1998); D. W. McLaughlin, and A. C. Scott, Phys. Rew. A 18, 1652 (1978)
I grandi acquafortisti italiani del Seicento: Testa, Castiglione e Rosa
No full textPanoramica dei grandi protagonisti dell'acquaforte in Italia nel 600: Salvator Rosa, Pietro Testa, G. B. Castiglion
La statua della Augusta Regina by Giuseppe Valenti in Valletta
No full textThe aim of this paper is for it to be a tribute to Queen Victoria through her monument in Valletta (1887-1891) by the sculptor Giuseppe Valenti from Palerm
Identifying Predictive Factors in Compliance with the COVID-19 Containment Measures: A Mediation Analysis
No full textGiusy Danila Valenti, Palmira Faraci Faculty of Human and Social Sciences, University of Enna “Kore”, Enna, ItalyCorrespondence: Giusy Danila ValentiCittadella Universitaria, 94100, ItalyEmail [email protected]: The outbreak of the COVID-19 pandemic has led governments to implement some containment measures to flatten the curve of the diffusion of the virus. The current study aims to investigate individual differences in compliance with these restrictive behaviors. In a sample of Italian individuals (N = 300), we examined whether sociodemographic factors, personality traits, fatalism, and fear could be considered as possible predictors.Methods: We performed a series of standard multiple regression analyses and proposed a mediation analysis to test the associations among variables.Results: Overall, our results suggested that men are less likely to engage in preventive behaviors, younger individuals are more reluctant to adhere to social distancing mandates, and fear has a functional role in predicting positive outcomes.Conclusion: The results of our analyses are discussed and suggestions for future research are provided.Keywords: pandemic, restrictions, protective variables, health behavior
Intraoperative sentinel node detection by an innovative imaging probe.
No full textIntraoperative sentinel node detection by an innovative imaging probe.
Campisi C, Soluri A, Stella S, Valenti G, Scopinaro F.
SourceInstitute of Biomedical Technologies, National Research Council, Rome. [email protected]
Abstract
Intraoperative tumor detection has been used in many applications, and today the sentinel node technique is a widely employed surgical procedure in breast cancer. Different detector systems are employed but several problems have been reported in clinical practice, in particular the difficulty to accurately detect the sentinel node within the axillary soft tissue. The problem is even greater for abdominal and thoracic tumors. We propose an innovative Imaging Probe (IP) able to visualize on a monitor the primary tumor and secondary lesions if appropriately radiolabeled. The IP can be optimally applied for minimally invasive surgery in breast cancer treatment, and a preliminary experience related to 15 patients and 20 sentinel nodes is reported here. We compared the results obtained with the IP to those obtained with an Anger camera and a traditional scintillation detector, and found them to be very promising. In particular the surgeon's work is greatly facilitated by direct visual guidance instead of a generic acoustic signal.
PMID:12369557[PubMed - indexed for MEDLINE
Sistema igienico di apertura e chiusura lattine
No full textIl trovato è un sistema per aprire e richiudere con facilità e in maniera igienica le lattine che contengono bevande. La linguetta della lattina viene incisa in due parti perfettamente eguali e simmetriche in modo che due leve divaricatrici possano spostarle lateralmente, una a destra ed una a sinistra, lasciando libera così tutta l’area per poter bere agevolmente (Figura 1). Dopo aver consumato parte del contenuto della lattina, la si può richiudere facendo l’operazione esattamente inversa.
Il leverismo della Figura 1 può essere modificato perché con la normale tecnica si può ipotizzare una svariata gamma di realizzazioni basate sul concetto di spostamento laterale. Due ulteriori esempi sono riportati nelle Figure 2 e 3. Pertanto, il trovato copre il concetto di apertura e chiusura, indipendentemente dalle svariate modalità di attuazione
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