112,393 research outputs found
Shale 3D Flow and Interaction With Basement Faults in the Niger Delta Deep-Water Fold and Thrust Belt
No full textBased on a large 3D seismic data set in the deep-water domain of the Niger Delta, this study challenges previous interpretations involving the occurrence of multiple detachments and extensive thrust flats, illustrating timing and mode of shales flow at the toe of the gravity system. Five units of syn-kinematic sediments, reaching a maximum thickness of similar to 800 m, accumulated in the tectonically subsiding synclines during fold amplification between similar to 9.5 and similar to 1.4 Ma. The volumes of syn-kinematic units roughly balance those of the shales accumulated in the thickened cores of WNW trending anticlines. This feature is consistent with folding resulting from buckling controlled by the competence contrast between isopach Cenozoic units and underlying overpressured shales of the Akata Formation. A dense network of NE-SW striking oblique extensional faults offsets a prominent anticline characterized by a NE-SW trend (which is almost perpendicular to the regional fold trend). These faults form a narrow, continuous deformation zone extending for tens of kilometers along and beyond the length of the anticline. The faults, rooting within the shales of the Akata Formation, formed since similar to 5 Ma and deform the seabed. Displacement distribution suggests mechanical interaction between isolated fault segments within the deformation zone. The latter is interpreted as the shallow expression of a deep-seated fault zone inherited from the segmented passive margin and marked by gravity and magnetic data. Our results, providing a comprehensive picture of active deformation features and their relationships with deep-seated faults, shed new light into the modes of interaction between gravity systems and underlying basement structures.The occurrence of thick successions of weak shales underlying sandy deltaic deposits control gravity-driven deformation in deep-water basins worldwide. In these conditions, large sedimentary bodies such as the Niger Delta of this study are characterized by (a) a spreading inner shallow-water sector, which undergoes collapse due to the fast accumulation of deltaic sediments, and (b) a deep-water domain characterized by shortening. Volume balancing in the latter domain points out that a 3D flow pattern must accommodate thickening of mobile shales into anticlinal cores as a result of flow of material from adjacent synclines. Folding occurred by buckling, a process characterized by mechanically active layering. This process was controlled by the strong viscosity contrast between the thick shales and the overlying sandy units, which tend to maintain a constant thickness in seismic lines. Fold nucleation was locally controlled by the occurrence of basement structures, which is revealed by magnetic and gravimetric data. These folds show "anomalous" trends that do not conform to the regional fold orientation. The interaction between the delta deposits and the underlying basement structures also led to the development of faults that display a clear morphology at the sea bottom and are therefore considered active.Volume balancing indicates that mobile shales accumulated into anticlinal cores as a result of 3D flow from surrounding synclinesThe incompetent Akata shales thickened in the core of the anticlines during buckle folding accompanied by late-stage thrustingThe detachment at the base of the shales interacted with basement structures, localizing deformation in overlying delta sediment
Inquadramento diagnostico e terapeutico delle asimmetrie facciali da ipersviluppo emimandibolare
No full textLa curva di Wilson in ortodonzia: concetti gnatologici ed implicazioni terapeutiche nelle disgnazie dento-maxillo-facciali
No full textArtistically Speaking. An Elementary to Intermediate Course in English for Italian Students of the Fine Arts
No full textIl testo è stato progettato e realizzato come primo strumento di lingua inglese per lo studente dell'Accademia di Belle Arti, utile come ripasso per chi ha già studiato l'inglese, e come inizio per chi deve ancora incominciare. Può essere utilizzato sia come testo per l'auto-apprendimento della lingua, sia come materiale di supporto dell'insegnante per le lezioni in classe. Ogni capitolo è suddiviso in gramatica, esercizi sia sulla grammatica che sul lessico, e lettura di testi relativi ad argomenti inerenti le arti visive. Attualmente è adottato per l'insegnamento della lingua inglese presso l'Accademia di Belle Arti di Bologna
Theory of Effective Stress in Soil and Rock and Implications for Fracturing Processes: A Review
No full textThe effective stress principle (ESP) plays a basic role in geology and engineering problems as it is involved in fundamental issues concerning strain and failure of rock and soil, as well as of other porous materials such as concrete, metal powders, biological tissues, etc. Although since its introduction in the 1920s the main ESP aspects have been unravelled and theoretically derived, these do not appear to have been always entirely perceived by many in the science community dealing with ESP-related topics but having little familiarity with the complex theories of porous media and poroelasticity. The purpose of this review is to provide a guidance for the reader who needs an updated overview of the different theoretical and experimental approaches to the ESP and related topics over the past century, with particular reference to geological fracturing processes. We begin by illustrating, after some introductive historical remarks, the basic theory underlying the ESP, based on theory of elasticity methods. Then the different ESP-related theories and experimental results, as well as main interpretations of rock jointing and fracturing phenomena, are discussed. Two main classical works are then revisited, and a rigorous ESP proof is derived. Such a proof is aimed at geologists, engineers and geophysicists to become more familiar with theories of porous media and poroelasticity, being based on the classical theory of elasticity. The final part of this review illustrates some still open issues about faulting and hydraulic fracturing in rocks
Il calamo della memoria. Riuso di testi e mestiere letterario nella tarda antichità. V
No full textRaccolta delle relazioni dsicusse nel V incontro internazionale di Trieste, 26.27 aprile 201
"I wanna be sustainable, but I don't wanna show it!": The effect of sustainability cues on young adult consumers' preferences
No full textGiven the urgent need to address plastic pollution, fashion companies are implementing diverse strategies to reduce plastic in their production processes. To communicate their commitment to plastic waste reduction, companies have started including symbols on their products (i.e., sustainability cues). However, the effect of these symbols on consumer behaviour remains unclear. Thus, through a mixed method involving three focus groups and two online experiments, we investigate the effect of sustainability cues on consumers' preferences. Our findings show that including sustainability cues on a product is not always an effective business strategy. Hence, we expand the ongoing debate on the effects of environmental strategies, offering new insights into consumers' perceptions of sustainability cues and demonstrating the importance of perceived proximity and environmental concern in enhancing or reducing buying intentions towards sustainable products. For fashion companies, we reveal if and how sustainability cues can represent a competitive leverage prompting environmentally friendly purchases
Stakeholder engagement in green place branding:a focus on user-generated content
No full textThe purpose of this research is to investigate how the green image of a city can affect potential visitors' attitude toward the city in the context of user‐generated content. The study adopts a 2 × 2 experimental design in which the greenness of the city image and the social distance between the users and the authors of social media content are examined. The results demonstrate that green image has a significant effect on attitudes toward cities. Moreover, the effects of social media content vary according to the perceived social distance between the author of the post and potential visitors. This study contributes to the literature by assessing the role that social media content plays in place branding and communication. Furthermore, it provides relevant insights on how institutions should enhance the sustainable resources of cities with their environmental policy and encourage the generation of content from various stakeholders to contribute to the development of a city's image
Supplemental Material - Positive psychology interventions for family caregivers coping with cancer: Who will use them?
No full textSupplemental Material for Positive psychology interventions for family caregivers coping with cancer: Who will use them? by Hoodin F, Gupta V, Mazzoli A, Braun T and Choi SW in Health Psychology Open</p
Il viaggio da tre soldi (Plaut.Trin. 820-1007)
No full textLettura del passo, analisi dei suoi meccanismi comici e proposta di integrare « uostrumque » dopo « mei » al v. 822 e di emendare « uobiscum iam » al v. 823
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