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Search Results: 1 - 10 of 200742 matches for " P. Salvini "
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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
Propagazione di fratture longitudinali in gasdotti caratterizzati da bassa duttilità
M. Minotti,P. Salvini,G. Demofonti
Frattura ed Integrità Strutturale , 2008,
Abstract: Il presente lavoro propone l’analisi di propagazione di una frattura fragile longitudinale di un gasdotto interrato basata sulla valutazione dell’energy release rate. Viene illustrata l’implementazione della suddetta metodologia all’interno di un codice proprietario agli elementi finiti con formulazione esplicita, illustrando gli interventi eseguiti sul preesistente algoritmo di propagazione stazionaria, e proponendo i risultati ottenuti a seguito di simulazioni dinamiche svolte su tubi in acciaio X80 e su provini SENB in pieno spessore sottoposti a prove DWTT.
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
Abstract:

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.

Background radioactivity in the scaler mode technique of the Argo-YBJ detector
I. Bolognino, C. Cattaneo, E. Giroletti, G. Liguori,P. Salvini
Astrophysics and Space Sciences Transactions (ASTRA) , 2011, DOI: 10.5194/astra-7-311-2011
Abstract: ARGO-YBJ is an extensive air shower detector located at the Yangbajing Cosmic Ray Laboratory (4300 m a.s.l., 606 g cm 2 atmospheric depth, Tibet, China). It is made by a single layer of Resistive Plate Chambers (RPCs, total surface ~6700 m2) grouped into 153 units called "clusters". The low energy threshold of the experiment is obtained using the "scaler operation mode", counting all the particles hitting the detector without reconstruction of the shower size and arrival direction. For each cluster the signals generated by these particles are put in coincidence in a narrow time window (150 ns) and read by four independent scaler channels, giving the counting rates of channel ≥1, ≥2, ≥3 and ≥4 hits. The study of these counting rates pointed out a different behavior of channel ≥1 respect to the higher multiplicity channels: while the MC simulations can account fairly well for the coincident counting rates, the expectation for channel ≥1 is sensibly less than the measured value. Moreover, the regression coefficient with the atmospheric pressure for channel ≥1 is also about half of the value measured for the coincident counting rates: seemingly half of these counts did not cross the atmosphere.Measurements of the natural radioactivity background in the air of the detector hall and a MC simulation to estimate its contribution on our counting rates are presented and discussed.
THREE INTERMITTENT SESSIONS OF CRYOTHERAPY REDUCE THE SECONDARY MUSCLE INJURY IN SKELETAL MUSCLE OF RAT
Nuno M. L. Oliveira,Elaine P. Rainero,Tania F. Salvini
Journal of Sports Science and Medicine , 2006,
Abstract: Although cryotherapy associated to compression is recommended as immediate treatment after muscle injury, the effect of intermittent sessions of these procedures in the area of secondary muscle injury is not established. This study examined the effect of three sessions of cryotherapy (30 min of ice pack each 2h) and muscle compression (sand pack) in the muscle-injured area. Twenty-four Wistar rats (312 ± 20g) were evaluated. In three groups, the middle belly of tibialis anterior (TA) muscle was injured by a frozen iron bar and received one of the following treatments: a) three sessions of cryotherapy; b) three sessions of compression; c) not treated. An uninjured group received sessions of cryotherapy. Frozen muscles were cross- sectioned (10 μm) and stained for the measurement of injured and uninjured muscle area. Injured muscles submitted to cryotherapy showed the smallest injured area (29.83 ± 6.6%), compared to compressed (39.2 ± 2.8%, p= 0.003) and untreated muscles (41.74 ± 4.0%, p = 0.0008). No difference was found between injured compressed and injured untreated muscles. In conclusion, three intermittent sessions of cryotherapy applied immediately after muscle damage was able to reduce the secondary muscle injury, while only the muscle compression did not provide the same effectiveness
Processi di investimento e dimensione economica delle imprese agricole
Ezio Salvini
Aestimum , 1988,
Abstract:
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
Abstract:
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
Abstract:
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.
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