Search results for "values."
showing 10 items of 1353 documents
A quantitative reverse Faber-Krahn inequality for the first Robin eigenvalue with negative boundary parameter
2021
The aim of this paper is to prove a quantitative form of a reverse Faber-Krahn type inequality for the first Robin Laplacian eigenvalueλβwith negative boundary parameter among convex sets of prescribed perimeter. In that framework, the ball is the only maximizer forλβand the distance from the optimal set is considered in terms of Hausdorff distance. The key point of our stategy is to prove a quantitative reverse Faber-Krahn inequality for the first eigenvalue of a Steklov-type problem related to the original Robin problem.
Non-linear dynamics of alpha and theta rhythm: correlation dimensions and Lyapunov exponents from healthy subject's spontaneous EEG.
1997
The aim of the present paper was to analyze some non-linear dynamic properties of the resting EEG from healthy subjects under eyes closed conditions. For this purpose we digitally filtered the spontaneous EEG in the theta (3-8 Hz) and alpha frequency range (8-13 Hz) and considered these independent rhythms as signals from a deterministic system. Under certain conditions non-linear dynamic systems are able to generate deterministic chaos, which means that similar causes do not produce similar effects. This phenomenon is called sensitive dependence on initial conditions. From different lead positions (F3, F4, Cz, P3, P4, O1 and O2) we calculated the so-called correlation dimension D2, which i…
Evolution of Worldwide Stock Markets, Correlation Structure and Correlation Based Graphs
2011
We investigate the daily correlation present among market indices of stock exchanges located all over the world in the time period Jan 1996 - Jul 2009. We discover that the correlation among market indices presents both a fast and a slow dynamics. The slow dynamics reflects the development and consolidation of globalization. The fast dynamics is associated with critical events that originate in a specific country or region of the world and rapidly affect the global system. We provide evidence that the short term timescale of correlation among market indices is less than 3 trading months (about 60 trading days). The average values of the non diagonal elements of the correlation matrix, corre…
Numerical analysis of composite plates with multiple delaminations subjected to uniaxial buckling load
2006
Abstract In this paper the buckling and post-buckling behaviour of unidirectional and cross-ply composite laminated plates with multiple delaminations has been studied. Finite elements analyses have been performed, using a linear buckling model, based on the solution of the eigenvalues problem, and a non-linear one, based on an incremental-iterative method. With non-linear method large displacements have been taken into account and also contact constraints between sublaminates have been added to avoid their interpenetration. It has been found that both delamination length and position and stacking sequence of the plies influence the critical load of the plate; furthermore, linear and non-li…
Simple technique for the intraoperative detection of Crohn's strictures with a calibration sphere.
2000
Several methods have been used to detect and evaluate small-bowel strictures in Crohn's disease. We describe a simple technique for the calibration of strictures using a 2.5-cm medical plastic sphere. This method provides an aseptic, safe, and effective calibration of the entire small bowel.
Is stress perceived differently in relationships with parents and peers? Inter‐ and intra‐regional comparisons on adolescents from 21 nations
2012
This study investigated how adolescents (mean age of 15 years) from 21 countries perceived parent- and peer-related stress. Across countries, adolescents perceived parent-related stress at considerably greater levels than peer-related stress. Adolescents assigned to six geographical regions differed significantly in overall stress levels as well as in the disparity between perceived stress levels in the parent and peer domain. Regional comparisons revealed that adolescents from Southern Europe exhibited the highest levels of parent-related stress, followed by adolescents from Latin America, the Middle East, and Asia. The stress levels of adolescents from Central European and North American …
Value congruence in health care priority setting: social values, institutions and decisions in three countries
2014
AbstractMost developed democracies have faced the challenge of priority setting in health care by setting up specialized agencies to take decisions on which medical services to include in public health baskets. Under the influence of Daniels and Sabin’s seminal work on the topic, agencies increasingly aim to fulfil criteria of procedural justice, such as accountability and transparency. We assume, however, that the institutional design of agencies also and necessarily reflects substantial value judgments on the respective weight of distributive principles such as efficiency, need and equality. The public acceptance of prioritization decisions, and eventually of the health care system at lar…
“El espíritu fáustico del mundo técnico”. Enfermedad mental y crítica cultural en la España de Franco
2021
'El espíritu fáustico del mundo técnico'. Enfermedad mental y crítica cultural en la España de Franco.‒ Teniendo en cuenta la querencia casi constitutiva de la medicina mental por la crítica cultural, no debe sorprender que, dentro de su particular litigio con la modernidad, la dictadura franquista fuese un periodo de in tensa floración del ensayismo psiquiátrico conservador. Partiendo de los temores de una posible regresión física y moral de la 'Hispanidad' a causa de la artificiosidad de la vida moderna, la infiltración del liberalismo y la erosión de los valores tradicionales, el género fue desplazando su interés hacia un análisis de la 'sociedad neuro tizada' que, con referentes filosóf…
Politics of tangibility, intangibility, and place in the making of a European cultural heritage in EU heritage policy
2016
The EU has recently launched several initiatives that aim to foster the idea of a common European cultural heritage. The notion of a European cultural heritage in EU policy discourse is extremely abstract, referring to various ideas and values detached from physical locations or places. Nevertheless the EU initiatives put the abstract policy discourse into practice and concretize its notions about a European cultural heritage. A common strategy in this practice is ‘placing heritage’ – affixing the idea of a European cultural heritage to certain places in order to turn them into specific European heritage sites. The materialisation of a European cultural heritage and the production of physic…
El cuento infantil como elemento pedagógico. La revista El Mundo de los Niños (1887-1891)
2018
Children's and young people's literature has been used as an instrument to transmit behaviors and values throughout history. Through illustrated magazines and the press, an increasing number of readers were receiving this type of informal education through stories and children's stories in which the protagonists were children with whom the reader could easily identify. The objective of this article is to analyze the stories and children's stories published in the decennial magazine El Mundo de los Niños –The World of Children– (1887-1891), to make an approximation to Spanish society at the end of the 19th century and its values. The method used was the content analysis, in which grouped by …