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Search Results: 1 - 10 of 144438 matches for " B. Atzori "
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Effetto delle dimensioni del cordone di saldatura sulla resistenza a fatica dei giunti a croce
B. Atzori,B. Rossi,G. Demelio
Frattura ed Integrità Strutturale , 2009,
Abstract: La scelta della dimensione da assegnare al cordone di saldatura nel caso di giunzioni saldate a croce può presentarsi problematica, specie quando gli spessori delle lamiere che formano il giunto sonodifferenti tra loro. Le normative di tipo tecnologico suggeriscono in genere di prevedere uno spessore del cordone di saldatura inferiore al minimo spessore della lamiera da collegare, mentre le normative di tipo strutturale non prevedono una dipendenza della resistenza del giunto, sia statica che a fatica, dalle dimensioni del cordone di saldatura, a meno che queste non siano tanto ridotte da portare a rotture che si inneschino e si propaghino non più nella lamiera base ma nel cordone di saldatura. Scopo del presente lavoro è la verifica,teorica e sperimentale, della variazione della resistenza a fatica al variare del rapporto tra lo spessore del cordone di saldatura e quello minimo delle lamiere da saldare.
Resistenza a fatica di strutture in leghe di alluminio: normative a confronto e verifica sperimentale
B. Atzori,G. Meneghetti,B. Rossi
Frattura ed Integrità Strutturale , 2009,
Abstract: Le problematiche relative all’utilizzo delle normative nell’ambito della progettazione a fatica di strutture in leghe di alluminio sono state di recente affrontate in numerosi lavori che hanno messo in luce sia le difficoltà legate al passaggio da normative oramai obsolete ad altre di nuova concezione, ma di caratteristiche e struttura completamente diverse, che la sostanziale carenza anche all’interno delle più recenti normative europee, quale l’Eurocodice 9, di molti risultati e metodi sviluppati in anni di ricerca scientifica e ormai indiscutibilmente consolidati. Il presente lavoro si propone di approfondire entrambe le tematiche tramite il confronto tra risultati sperimentali tratti da letteratura e le corrispondenti curve di resistenza proposte rispettivamente dalla normativa italiana UNI 8634, di recente ritirata, e dall’Eurocodice 9. In questo modo verranno messe in luce le differenze tra i valori di resistenza proposti dalle due norme e verrà illustrata sia la corrispondenza a volte poco soddisfacente con i risultati sperimentali che le conseguenze dovute alla mancata applicazione di assodati risultati teorici.
Analysis of the fatigue strength under two load levels of a stainless steel based on energy dissipation
B. Atzori,G. Meneghetti,M. Ricotta
Frattura ed Integrità Strutturale , 2011,
Abstract: In this paper the fatigue behaviour of a stainless steel AISI 304L is analysed. In the first part of the work the results obtained under constant amplitude fatigue are presented and synthesised in terms of both stress amplitude and energy released to the surroundings as heat by a unit volume of material per cycle, Q. Then some specimens have been fatigued in variable amplitude, two different load level tests: the first level was set higher while the second was lower than the constant amplitude fatigue limit. The Q values, evaluated during the second part of the fatigue test, have been compared with those calculated under constant amplitude fatigue at the same load level. The comparison allowed us to notice that the Q parameter is sensitive to the fatigue damage accumulated by the material during the first part of the fatigue test.
Analysis of the fatigue strength under two load levels of a stainless steel based on energy dissipation
Atzori B.,Meneghetti G.,Ricotta M.
EPJ Web of Conferences , 2010, DOI: 10.1051/epjconf/20100638009
Abstract: In this paper the fatigue behaviour of a stainless steel AISI 304L is analysed. In the first part of the work the results obtained under constant amplitude fatigue are presented and synthesised in terms of both stress amplitude and energy released to the surroundings as heat by a unit volume of material per cycle, Q. Then some specimens have been fatigued in variable amplitude, two different load level tests: the first level was set higher while the second was lower than the constant amplitude fatigue limit. The Q values, evaluated during the second part of the fatigue test, have been compared with those calculated under constant amplitude fatigue at the same load level. The comparison allowed us to notice that the Q parameter is sensitive to the fatigue damage accumulated by the material during the first part of the fatigue test.
The Potential of Cerebrolysin in the Treatment of Schizophrenia  [PDF]
Gonzalo Flores, Marco Atzori
Pharmacology & Pharmacy (PP) , 2014, DOI: 10.4236/pp.2014.57079
Abstract:

Schizophrenia and psychosis are psychiatric condition whose neural mechanisms are yet incompletely known, and for which pharmacological treatment is too often ineffective in a growing clinical cohort. Recently, dendritic morphological changes in arborization and dendritic spine density in limbic regions has been reported in postmortem tissue from schizophrenic patients and in animal models of schizophrenia, suggesting that the use of medication improving synaptogenesis may be beneficial as additional treatment of psychotic patients. Cerebrolysin (Cbl) is a drug available for clinical with active neuropeptides fragments that mimics the action of endogenous neurotrophic factors such as BDNF, GDNF, CNTF and NGF, which improves the integrity of the neuronal circuits as well as cognitive and behavioral performance by exerting a neuroprotective effect and promoting the generation of new functional synapses. Recent work from our laboratory has shown that Cbl ameliorates synaptic and dendritic pathology in animal models of schizophrenia by increasing synaptic density and restoring neuronal cytoarchitecture. This neuroprotective effect improves the integrity of the neuronal circuits and improves cognitive and behavioral performance. Importantly, Cbl treatment seems to be safe when used in combination with neuroleptics such as risperidone. The present article analyzes the potential of Cbl in the treatment of neurodevelopmental disease, and reviews the current literature on the effects of Cbl in in vivo animal models of neurodevelopmental disorders like schizophrenia.

BOOK REVIEW / RESE A: BAZTARRIKA GALPARSORO, Patxi Xabier, Babel o barbarie – Una política lingüística legítima y eficaz para la convivencia
Chiara Atzori
Ogigia. Revista Electrónica de Estudios Hispánicos , 2011,
Abstract:
BOOK REVIEW / RESE A: SáNCHEZ TORTOSA, José, El profesor en la trinchera, Madrid, La Esfera de los Libros, 2008. ISBN: 978-84-9734-718-1.
Chiara Atzori
Ogigia. Revista Electrónica de Estudios Hispánicos , 2008,
Abstract:
La imagen de Espa a en el mosaico cultural paneuropeo:retos y compromisos del Consejo de Europa en la cooperación intercultural.
Chiara Atzori
Ogigia. Revista Electrónica de Estudios Hispánicos , 2007,
Abstract: ENGLISH:Since 1949, the Council of Europe is engaged to defend democracy and human rights in its member States. Today’s global economy – more than ever – leads the Council to focus its mediation role in the intercultural co-operation, to protect and preserve thelarge variety of languages and cultures that live within its territory. After the adoption of the Declaration on Cultural Diversity in 2000, Council of Europe cultural policies’, in which Spain is also actively involved, call the attention on the richness of the European cultural heritage. This heritage, thanks to new creative entrepreneurships, is becoming the real engine of the local economies.SPANISH:Desde 1949, el Consejo de Europa se compromete a defender la democracia y los derechos humanos de los Estados miembros. Hoy día, la nueva economía global, más que nunca lleva al Consejo a centrar su papel de mediador en la cooperación intercultural, para defender y conservar la variedad de lenguas y culturas que habitan su territorio. Tras la aprobación de la Declaración sobre la Diversidad Cultural en 2000, las políticas culturales del Consejo de Europa, en las que Espa a participa activamente, hacen hincapié en la riqueza del patrimonio cultural. Gracias a nuevas y creativas formas decapacidad empresarial, este patrimonio se está convirtiendo en el verdadero motor de las economías locales.
BOOK REVIEW / RESE A: JOCILES RUBIO, María Isabel y FRANZé MUDANó, Adela, Es la escuela el problema?Perspectivas socio-antropológicas de etnografía y educación. Madrid, Editorial Trotta, 2008, 416 pp.ISBN: 978-84-9879-007-8
Chiara Atzori
Ogigia. Revista Electrónica de Estudios Hispánicos , 2009,
Abstract:
La perspectiva femenina en la obra Mujeres de ojos grandes, de ángeles Mastretta / Women's perspective in Mujeres de ojos grandes, by ángeles Mastretta
Chiara Atzori
Ogigia. Revista Electrónica de Estudios Hispánicos , 2011,
Abstract: Mexican writer ángeles Mastretta, with a spare style and irony, narrates the strategies used by a group of brave, modern, and rebellious Mexican women in order to achieve a space of freedom in their lives, in spite of living in the Mexican society of the rst third of the 20th century dominated by masculine hegemony.RESUMEN: La escritora mexicana ángeles Mastretta, con estilo e caz e ironía, cuenta las estrategias empleadas por un grupo de mujeres mexicanas valientes y originales, rebeldes y modernas, que logran conquistar un espacio de libertad en sus vidas, a pesar de vivir en la sociedad mexicana del primer tercio del siglo XX, dominada por una hegemonía homocentrista.
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