1,721,305 research outputs found
Jean-François Vernay (ed.). 2021. The Rise of the Australian Neurohumanities. New York: Routledge
Full text linkAt a time when in Australia the humanities are becoming less important to the benefit of
STEM education, the cognitive approach to the study of literature is acquiring symbolic and
political significance. It could be seen as a promising area of reconciliation of the sciences
with the humanities, in which literature is redefined as a rich cognitive artefact and a kind of
ever-expanding archive which, among other things, embodies the extension of the cognitive
capacities of our brain. All of this probably helps to explain why Australian cognitive
and neurohumanist literary studies seem to be multiplying and gaining more and more
visibility in the global academic scene, with a growing number of theoretical works mixing
scientific approaches and literary critical practice. A survey of such emerging research field
was attempted in the volume The Rise of Australian Neurohumanities edited by Jean-François
Vernay (2021)
On the reconstitution problem in the multiple time-scale method
No full textHigher-order multiple-scale methods for general multiparameter mechanical systems are studied. The role played by the control and imperfection parameters in deriving the perturbative equations is highlighted. The definition of the codimension of the problem, borrowed from the bifurcation theory, is extended to general systems, excited either externally or parametrically. The concept of a reduced dynamical system is then invoked. Different approaches followed in the literature to deal with reconstituted amplitude equations are discussed, both in the search for steady-state solutions and in the analysis of stability. Four classes of methods are considered, based on the consistency or inconsistency of the approach, and on the completeness or incompleteness of the terms retained in the analysis. The four methods are critically compared and general conclusions drawn. Finally, three examples are illustrated to corroborate the findings and to show the quantitative differences between the various approaches
Performances of different DFT functionals to calculate the anodic limit of fluorinated sulphonyl-imide anions for lithium cells
Full text linkIn this paper we investigated the calculation of the anodic limit of two anions of ionic liquids, largely used as electrolyte of lithium batteries. Starting from a model based on calculations performed on single ions at the MP2 level of theory, we showed that the matching between calculation and experiments decreases while using more expanded basis set with respect to 6-31G**, possibly because of the destabilization of the neutral species when larger basis sets are considered. Additionally, in order to decrease the computational time, the performances for the calculation of the anodic limit obtained by means of a series of DFT functionals with increasing level of complexity (from the Generalized Gradient Approximation to the Range Separated Hybrid meta–Generalized Gradient Approximation) were compared. Overall, the best performing functionals are BMK, ωB97M-V and MN12-SX, while acceptable results can be obtained by M06-2X, M11, M08-HX and M11-L. Some less computationally expensive functionals, like CAM-B3LYP and ωB97X-D, also provide reasonable values of the anodic limit
Perturbation methods for bifurcation analysis from multiple nonresonant complex eigenvalues
No full textIt is shown that the logical bases of the static perturbation method, which is currently used in static bifurcation analysis, can also be applied to dynamic bifurcations. A two-time version of the Lindstedt-Poincare Method and the Multiple Scale Method are employed to analyze a bifurcation problem of codimension two. It is found that the Multiple Scale Method furnishes, in a straightforward way, amplitude modulation equations equal to normal form equations available in literature. With a remarkable computational improvement, the description of the central manifold is avoided. The Lindstedt-Poincare Method can also be employed if only steady-state solutions have to be determined. An application is illustrated for a mechanical system subjected to aerodynamic excitation
Planar motion of a cable-supported beam with feedback controlled actions
No full textActive tendon control for slender and flexible structural systems such as guyed mast and cable-stayed bridge, is an innovative methodology to contain their oscillations. In this paper, a simple cable-supported cantilever beam is controlled by means of an imposed longitudinal displacment at the grounded end of the cable aiming to stabilize planar oscillation amplitudes of both cable and beam. The equations of motion of this system are obtained including cable elasticity through finite strain. Analytical eigensolutions of the linearized equations are used to investigate influences of mechanical characteristics on a family of structural systems and to derive a nonlinear discrete model by classical Galerkin method. A one mode model is used to design linear and nonlinear feedback control laws. Comparisons on the effectiveness of different strategies are made on the basis of both con trol intensity and system response amplitudes
F. Fabro, Identità culturale e violenza. Neuropsicologia delle lingue e delle religioni
No full textMultiple scale analysis for divergence Hopf bifurcation of imperfect symmetric systems
No full textThe multiple time-scale method is adapted to study the post-critical behavior of general non-conservative symmetric systems, possibly affected by imperfections, for which divergence and Hopf bifurcations interact. The procedure illustrated makes it possible to elude the computational burden related to the application of the center manifold reduction. It also furnishes explicit expressions of the coefficients of the standard normal form bifurcation equations in terms of the coefficients of the original system. As an example, the method is applied to a two-degree-of-freedom rigid bar subjected to axial load (Augusti's model) and transversal flow. The critical and post-critical scenarios are analyzed in detail, for both the perfect and imperfect systems. (C) 1998 Academic Press
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