OALib Journal期刊

ISSN: 2333-9721



匹配条件: “SALVINI” ,找到相关结果约98条。
Intraplate Transtensional Tectonics in the East Antarctic Craton: Insight from Buried Subglacial Bedrock in the Lake Vostok—Dome C Region  [PDF]
Paola Cianfarra, Francesco Salvini
International Journal of Geosciences (IJG) , 2013, DOI: 10.4236/ijg.2013.49122

This study presents the results of forward numerical models of a series of sections of the Aurora Trench (East Antarctica) derived from radio echo-sounding data that allowed to reconstruct the 3D shape of the Aurora Fault, a crustal listric normal fault characterized by a length exceeding 100 km. A similar extensional fault setting allows to replicate the asymmetric buried morphology of the magnetic basement at the Lake Vostok depression derived by the available gravity and magnetic profiles. Both the Aurora and Vostok listric fault reach their basal decollment at 34 km depth, possibly the base of the crust in this intracratonic environment. Integration of these results with the existing geologic interpretations of the tectonic origin of the Concordia Trench by normal faulting allowed to frame the Concordia, Aurora and Vostok normal faults within an intraplate transtensional corridor with a left-lateral movement component. The westward projection of the proposed strike-slip deformation belt may develop in correspondence of an older tectonic lineament stretching from the Eastern flanks of the Gamburtsev Subglacial Mts to the Lambert rift and characterized by a poly-phased complex tectonic history. The possible Cenozoic reactivation of these structures is discussed in the paper.

Processi di investimento e dimensione economica delle imprese agricole
Ezio Salvini
Aestimum , 1988,
Block tectonics in thin-skin style-deformed regions: examples from structural data in central Appennines
F. Salvini
Annals of Geophysics , 1993, DOI: 10.4401/ag-4277
Modello coesivo per l’avanzamento di fratture mediante rilascio nodale di strutture discretizzate con elementi finiti
M. Minotti,P. Salvini
Frattura ed Integrità Strutturale , 2010,
Abstract: La simulazione numerica della propagazione di una frattura in MODO I, viaggiante ad elevata velocità in un acciaio a comportamento duttile è realizzata attraverso un modello coesivo che governa la distribuzione delle forze di rilascio nodale. Come noto, la ricerca di un valore di tensione all’apice non ha alcun senso nel caso elastico; infatti, la tensione può essere valutata solo mediante fattori di campo. Nel caso elastoplastico, incrudimento e softening di origine geometrica o legato al progressivo danneggiamento influiscono decisamente sull’andamento esponenziale del campo tensionale. è possibile comunque individuare un valore di riferimento, di entità finita, mediante estrapolazione delle tensioni elasto-plastiche nella zona di inizio softening della frattura. Tale grandezza può essere presa come fattore di riferimento per il calcolo delle forze di rilascio coesive e quindi dell’energia dissipata. Nel lavoro viene discusso come determinare, dal campo di tensione elasto-plastico locale, il valore che governa la zona coesiva al variare del T-stress
Estudo inédito sobre o pesquisador fisioterapeuta brasileiro New study on the Brazilian physical therapy researcher
Tania F. Salvini
Brazilian Journal of Physical Therapy , 2009, DOI: 10.1590/s1413-35552009000500001
Things change: Women's and men's marital disruption dynamics in Italy during a time of social transformations, 1970-2003
Silvana Salvini,Daniele Vignoli
Demographic Research , 2011,
Abstract: We study women's and men's marital disruption in Italy between 1970 and 2003. By applying an event-history analysis to the 2003 Italian variant of the Generations and Gender Survey we found that the spread of marital disruption started among middle-highly educated women. Then in recent years it appears that less educated women have also been able to dissolve their unhappy unions. Overall we can see the beginning of a reversed educational gradient from positive to negative. In contrast the trend in men's marital disruption risk appears as a change over time common to all educational groups, although with persisting educational differentials.
Assessment of Alexithymia: Psychometric Properties of the Psychological Treatment Inventory-Alexithymia Scale (PTI-AS)  [PDF]
Alessio Gori, Marco Giannini, Giulia Palmieri, Roberta Salvini, David Schuldberg
Psychology (PSYCH) , 2012, DOI: 10.4236/psych.2012.33032
Abstract: Background: The aim of this study is to investigate the psychometric properties of a new measure of alexithymia, the Psychological Treatment Inventory-Alexithymia Scale (PTI-AS). Method: A group of 778 participants completed the PTI-AS. In order to evaluate aspects of concurrent validity, a part of the sample (n = 116) completed the PTI-AS, the Twenty-Items Toronto Alexithymia Scale (TAS-20) and the Bermond-Vorst Alexithymia Questionnaire (BVAQ). In order to evaluate aspects of discriminant validity a group of patients with a diagnosis of Eating Disorders completed the PTI-AS, the TAS-20 and the Eating Disorders Inventory (EDI-3). Results: Exploratory Factor Analysis (EFA) showed a solid structure with one factor. Results were confirmed by Confirmatory Factor Analysis (CFA), which yielded good fit indices (CFI = .98; TLI = .95; RMSEA = .08; SRMR = .04). The PTI Alexithymia Scale showed a good degree of internal consistency (α = .88). Correlations between the PTI Alexithymia Scale, the TAS-20 (r = .74, p < .001) and the BVAQ (r = .40, p < .001) were statistically significant, supporting the scale’s concurrent validity. Conclusion: Thanks to its good psychometric properties the PTI-AS can be considered as a brief and useful measure for assessing alexithymia.
Fast gain calibration in radio astronomy using alternating direction implicit methods: Analysis and applications
Stefano Salvini,Stefan J. Wijnholds
Physics , 2014, DOI: 10.1051/0004-6361/201424487
Abstract: Context. Modern radio astronomical arrays have (or will have) more than one order of magnitude more receivers than classical synthesis arrays, such as the VLA and the WSRT. This makes gain calibration a computationally demanding task. Several alternating direction implicit (ADI) approaches have therefore been proposed that reduce numerical complexity for this task from $\mathcal{O}(P^3)$ to $\mathcal{O}(P^2)$, where $P$ is the number of receive paths to be calibrated. Aims. We present an ADI method, show that it converges to the optimal solution, and assess its numerical, computational and statistical performance. We also discuss its suitability for application in self-calibration and report on its successful application in LOFAR standard pipelines. Methods. Convergence is proved by rigorous mathematical analysis using a contraction mapping. Its numerical, algorithmic, and statistical performance, as well as its suitability for application in self-calibration, are assessed using simulations. Results. Our simulations confirm the $\mathcal{O}(P^2)$ complexity and excellent numerical and computational properties of the algorithm. They also confirm that the algorithm performs at or close to the Cramer-Rao bound (CRB, lower bound on the variance of estimated parameters). We find that the algorithm is suitable for application in self-calibration and discuss how it can be included. We demonstrate an order-of-magnitude speed improvement in calibration over traditional methods on actual LOFAR data. Conclusions. In this paper, we demonstrate that ADI methods are a valid and computationally more efficient alternative to traditional gain calibration method and we report on its successful application in a number of actual data reduction pipelines.
Electrical stimulation and isokinetic training: effects on strength and neuromuscular properties of healthy young adults
Avila, MA;Brasileiro, JS;Salvini, TF;
Brazilian Journal of Physical Therapy , 2008, DOI: 10.1590/S1413-35552008005000006
Abstract: objective: to assess the effects of neuromuscular electrical stimulation (nmes) associated with an isokinetic training program in healthy young men and women. methods: twenty participants (ten men, ten women; 21±1.5 years) underwent an isokinetic training program for knee extensors of both sides (three sets of ten concentric repetitions at 30°/s) twice a week for four weeks. one limb underwent only the isokinetic strength training (ex) while the other underwent the same training but with nmes associated with each contraction (ex+nmes). the current used for nmes was the russian current (frequency of 2,500hz, 50 bursts/s and pulse duration of 200μs). isometric and isokinetic concentric extensor torque at 30°/s were evaluated. results: the groups increased their peak torque in both test procedures, with no difference between ex and ex+nmes. the angle of peak torque increased for the ex limb, thus showing a change in the tension-length relationship of the muscle group tested, which did not occur for the ex+nmes limb. there was also a decrease in acceleration time in both limbs, without any effects from nmes on this variable. conclusions: these results showed that the association between nmes and isokinetic concentric voluntary strength training did not improve the strength gains and neuromuscular properties of voluntary strength training itself for healthy young participants of both genders.
O Efeito da crioterapia e compress?o interminente no músculo lesado de ratos: uma análise morfométrica
Oliveira, NML;Gava, AD;Salvini, TF;
Brazilian Journal of Physical Therapy , 2007, DOI: 10.1590/S1413-35552007000500012
Abstract: introduction: although cryotherapy associated with compression has been recommended as an immediate treatment for muscle injuries, the effect of intermittent sessions of these procedures in the area of secondary muscle injuries has not been clearly established. objective: to evaluate the effect of intermittently applying cryotherapy and compression (three 30-minute sessions at 90-minute intervals) on an injured area of the right tibialis anterior (rta) muscle in rats. method: an injury was induced in the rta muscle by means of cryoinjury. twenty-four wistar rats (340 ± 20g) were divided into four experimental groups: a) injury + cryotherapy (i+c), which received intermittent cryotherapy and compression; b) injury + placebo (i+p), which received placebo treatment; c) injury (i), which did not undergo any treatment protocols; and d) cryotherapy, which remained intact and underwent cryotherapy and compression treatment. the animals were sacrificed 24 hours after the injury, and the muscles were sectioned in a cryostat. the histological sections were stained with toluidine blue for subsequent measurement of the area of the muscle injury (morphometry). the statistical analysis consisted of the anova and tukey tests (p < 0.05). results: the morphometric analysis 24 hours after the injury indicated that there had been a significant reduction in the area of the muscle injury in the i+c group (35.87 ± 4.9%), in comparison with the i+p group (46.4 ± 3.9%; p= 0.001) and the i group (46.5 ± 4.1%; p= 0.002). conclusion: three sessions of cryotherapy and compression were efficient in preventing an increase in the injured area, while compression alone did not achieve such effectiveness.

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