Search results for "CONST"
showing 10 items of 7706 documents
Heat transfer calculation in a free convection air solar collector
1998
This paper deals with the free convective air flow developing in a vertical channel with a rectangular cross-section heated on one side. The channel geometric and physical properties are such as to simulate an air solar collector suitable for building heating. A calculation method that can be applied to the transient combined heat transfer by conduction through the wall and by convection from the wall to the air stream is presented. The conduction across the wall is computed with a one-dimensional, time-dependent finite difference scheme, with convective boundary conditions at both wall surfaces. For the free convective flow along the channel, the air flow rate and the mean convective coeff…
Fronts propagating with signal dependent speed in limited diffusion and related Hamilton-Jacobi formulations
2021
We consider a class of limited diffusion equations and explore the formation of diffusion fronts as the result of a combination of diffusive and hyperbolic transport. We analyze a new class of Hamilton-Jacobi equations arising from the convective part of general Fokker-Planck equations ruled by a non-negative diffusion coefficient that depends on the unknown and on the gradient of the unknown. We explore the main features of the solution of the Hamilton-Jacobi equations that contain shocks and propose a suitable numerical scheme that approximates the solution in a consistent way with respect to the solution of the associated Fokker-Planck equation. We analyze three model problems covering d…
A Space-Time Meshless Method for Heat Transfer Problems With High Discontinuities
2013
The aim of this research is the development of a space-time driscretization method based on Diffuse Approximation Meshless method. This method, devoted to transient heat transfer problems presenting high temporal discontinuities, avoids any Finite-Difference time stepping procedure. The space-time discretization proposed here seems to be convenient for continuous transient heat transfer. Nevertheless, for problems including temporal discontinuities, some spurious oscillations, whose amplitudes depend on source power, appear. A new weight function respecting the principle of causality, based on a modification of the involved node’s selection and a normalisation of the distances, is developed…
Multiple solutions with sign information for semilinear Neumann problems with convection
2019
We consider a semilinear Neumann problem with convection. We assume that the drift coefficient is indefinite. Using the theory of nonlinear operators of monotone type, together with truncation and comparison techniques and flow invariance arguments, we prove a multiplicity theorem producing three nontrivial smooth solutions (positive, negative and nodal).
El diálogo entre la Corte Interamericana de Derechos Humanos, los Tribunales Constitucionales de la Región Andina y el Tribunal Europeo de Derechos H…
2015
La comunicación entre tribunales, posibilita la existencia de un intercambio de ideas sobre lo que se debe entender por el contenido de un derecho o de una garantía, con la tendencia de otorgarse mayor protección a favor del ser humano; diálogo que no implica la existencia del predominio de una jurisdicción (internacional o estatal) sobre otra, al contrario con las interrelaciones que se producen entre tribunales, lo que se busca es lograr convergencias interpretativas que propicien un entendimiento común de los derechos y de las garantías. Se ha elegido para trabajar algunas garantías y derechos, como son el plazo razonable, juez natural, libertad de pensamiento-expresión e información- e …
Human Rights in Romanian Courts: A European Perspective?
2016
The perception and application of the European Convention on Human Rights by various national jurisdictions depends fundamentally on the way in which the Convention has been introduced into national law, as well as, in some countries, by how constitutional jurisdictions shaped this relationship. The article examines the reception of the Convention by a few European states, with a special regard on the case of Romania. Romanian courts, including the Constitutional Court and the supreme court, had a hesitant approach of the principle established by 1991 Constitution of the priority of international law of human rights over domestic law. In the context of the diversity of sources of the Europe…
The pharmacology of the genus Sophora (Fabaceae): An updated review.
2019
Abstract Background The genus Sophora (Fabaceae) represents one of the important medicinal plant genera regarding its chemical constituents and outstanding pharmacological activities. Purpose In this review, we surveyed the latest findings on the bioactivities of different Sophora extracts and isolated phytochemicals during the past 8 years (2011–2019) updating the latest review article in 2011. The aim of this review is to focus on the molecular pharmacology of Sophora species to provide the rationale basis for the development of novel drugs. Results Sophora and its bioactive compounds possess outstanding pharmacological properties, especially as anticancer and anti-inflammatory drugs, in …
La constitution européenne: une lecture espagnole
2005
La versión que aquí se facilita es el texto mecanografiado por el autor, que posteriormente fue publicado en el diario "Le monde" con alguna pequeña variación.
Measuring emotional instability, prosocial behavior and aggression in pre-adolescents: A cross-national study
1997
Abstract Three scales measuring emotional instability, prosocial behavior and aggression were analyzed in a new study involving subjects between the ages of 11 and 15 from three different countries: Italy, Hungary and the Czech Republic. Principal component analysis (PCA), simultaneous component analysis (SCA) and congruence coefficients were used to evaluate and compare the factorial structure of the scales in the three different countries. Results clearly show a substantial equivalence of the components in the three countries, attesting to the generalizability of these measures in different cultural contexts. Country comparisons on the mean level of the scales show that Italian boys and g…
Nonsmooth Mechanics. Convex and Nonconvex Problems
1999
Nonlinear, multivalued and possibly nonmonotone relations arise in several areas of mechanics. A multivalued or complete relation is a relation with complete vertical branches. Boundary laws of this kind connect boundary (or interface) quantities. A contact relation or a locking mechanism between boundary displacements and boundary tractions in elasticity is a representative example. Material constitutive relations with complete branches connect stress and strain tensors, or, in simplified theories, equivalent stress and strain quantities. A locking material or a perfectly plastic one is represented by such a relation. The question of nonmonotonicity is more complicated. One aspect concerns…