Search results for "REE"
showing 10 items of 13625 documents
Noise effect in a sine-Gordon Lattice
2013
International audience; This paper is devoted to the influence of internal noise in a sine-Gordon chain exhibiting the well known nonlinear supratransmission phenomenon. It is shown that spatiotemporal noise can trigger breather modes with a given probability in a range of parameters where they do not occur without noise. A frequency analysis is carried out to quantify the degree of coherence of the emitted breather. It is shown that there exists an appropriate amount of noise which ensures the existence of breather modes with the best coherence.
Inference of proto-neutron star properties from gravitational-wave data in core-collapse supernovae
2021
The eventual detection of gravitational waves from core-collapse supernovae (CCSN) will help improve our current understanding of the explosion mechanism of massive stars. The stochastic nature of the late post-bounce gravitational wave signal due to the non-linear dynamics of the matter involved and the large number of degrees of freedom of the phenomenon make the source parameter inference problem very challenging. In this paper we take a step towards that goal and present a parameter estimation approach which is based on the gravitational waves associated with oscillations of proto-neutron stars (PNS). Numerical simulations of CCSN have shown that buoyancy-driven g-modes are responsible …
Non-linear analysis of plane steel prestressed truss in fire
2002
The concept of analysis of 2-D static loaded prestressed steel trusses till failure during fire using a modified method of forces is presented. Failure of steel trusses in fire is based on the criterion of stresses. Behaviour of steel is described by non-linear constitutive model (based on hypo-elastic Ramberg-Osgood formula and Dorn creep theory) and Plem proposition (for string). Both models are approximated in calculations by hyperbolic Norton-Bailey rule. Fire simulates thermal force as an action of high temperature that increases linearly up to some level. The complete formulation of this method is illustrated by the algorithm of model parameters identification. Analysis of results for…
Multiscale Biomechanical Characterization of Ligaments and Tendons of the Human Knee
2020
Differences between current clinical guidelines for screening, diagnosis and management of non-alcoholic fatty liver disease and real-world practice:…
2021
International audience; INTRODUCTION: Nonalcoholic fatty liver disease (NAFLD) is the most common liver disease and is associated with obesity and metabolic comorbidities. Liver steatosis can progress to nonalcoholic steatohepatitis (NASH) exhibiting a relevant risk of fibrosis and ultimately liver failure. To date, no approved treatment for NASH to reduce its clinical and humanistic burden has been developed. AREAS COVERED: We undertook a literature review to identify English language, national and international clinical guidelines for NAFLD regarding diagnosis, assessment and management, and determined their points of agreement and difference. Additionally, we investigated published liter…
Biodiverse green roofs in Mediterranean climate. Input and lessons learned from Germany and Switzerland
In the realm of the doctoral program in technologies for sustainability and land restoration, this thesis deepens sustainable and ecological solutions for Mediterranean environment after the German tradition and the Swiss school of green roofs for biodiversity. Specific aims were to: (1) assess the effectiveness of the existing green roofs norms in supporting biodiversity; (2) review methodologies and approaches for the implementation of biodiverse green roofs but also their application for ecological design; (3) identify habitat templates in the Mediterranean ecoregion replicable on green roofs; and (4) investigate the long term vegetation development of unmanaged green roofs in order to g…
Riflessioni per una definizione di “prodotto agricolo sostenibile”
2021
Il presente lavoro si propone di riflettere circa i limiti che l’assenza di un’adeguata definizione di “prodotto sostenibile” comporta, tentando una sua ricostruzione pure alla luce di una più ampia analisi del principio di sostenibilità e della sua evoluzione nel corso degli ultimi decenni. L’assenza di un quadro normativo chiaro genera, infatti, incertezze pure in sede di trasmissione al consumatore delle scelte di sostenibilità assunte dalle imprese in ambito agroalimentare, non permettendo a tali soggetti di definire consapevolmente la propria dieta. Il rischio di informazioni ingannevoli e la difficoltà nell’identificare quando i comportamenti assunti siano il risultato di una politica…
SYNTHESIS, REACTIVITY OF ISOINDOLE DERIVATIVES
2004
Application of time-dependent many-body perturbation theory to excitation spectra of selected finite model systems
2016
In this thesis, an approximate method introduced to solve time-dependent many-body problems known as time-dependent many-body perturbation theory is studied. Many-body perturbation theory for interacting electrons and phonons is reviewed. In particular, the electron propagator G and an unconventional two-component phonon propagator, which satisfy coupled integral Dyson equations, are introduced. In practice, the associated integral kernels known as the electron Σ and phonon self-energies need to be approximated. The conserving approximations known as the Hartree (-Fock) and the first and second Born approximations, which respect the continuity equation between the electron density and curren…
Sicilia in Survey of Numismatic Research 2008-2013
2015
The contribution is a critical analysis of the scientific studies of Greek and Roman numismatics concerning Sicily and produced between 2008 and 2013. The examination reveals a growing interest in the age of the "signing masters", even if the number does not seem to decrease attention for the years between Dionysius and Timoleon and for the period of the end of the III century BC, when Sicily entered the orbit of Rome. There are numerous publications of coin finds and hoards. There is also a particular attention to antiquities, while one of the main poles of interest continues to be iconography.