Search results for "integral"
showing 10 items of 902 documents
Population processes under the influence of disasters occurring independently of population size
1989
Markov branching processes and in particular birth-and-death processes are considered under the influence of disasters that arrive independently of the present population size. For these processes we derive an integral equation involving a shifted and rescaled argument. The main emphasis, however, is on the (random) probability of extinction. Its distribution density satisfies an equation which can be solved numerically at least up to a multiplicative constant. In an example it is also found by simulation.
On the computational aspects of a symmetric multidomain BEM for elastoplastic analysis
2012
The symmetric boundary element method (SBEM) is applied to the elasto-plastic analysis of bodies subdivided into substructures. This methodology is based on the use of: a multidomain SBEMapproach, for the evaluation of the elastic predictor; a return mapping algorithm based on the extremal paths theory, for the evaluation of inelastic quantities characterizing the plastic behaviour of each substructure; and a transformation of the domain inelastic integrals of each substructure into corresponding boundary integrals. The elastic analysis is performed by using the SBEM displacement approach, which has the advantage of creating system equations that only consist of nodal kinematical unknowns a…
Intorno alla risoluzione delle equazioni algebriche di quinto grado per funzioni ellittiche in Betti e Brioschi. Tra opere a stampa e corrispondenze …
2007
Evaluación de políticas y dación de cuentas, requisitos para una adecuada gobernabilidad territorial a partir de una nueva planificación; combinando …
2014
Una adecuada gobernabilidad del territorio es un factor clave para lograr un desarrollo justo, democrático y en dignidad. Para ello se consideran elementos decisivos la reinterpretación de la labor de gobierno, con renovadas prácticas de gobernanza más democrática y participada, la incorporación del territorio en la agenda política y la recuperación del espacio de vida en aplicación y desarrollo del principio de subsidiariedad. Muchas de estas cuestiones forman parte del acervo común y representan un potencial y atractivo campo de desarrollo profesional de la geografía. El texto analiza las relaciones entre gobierno, gobernanza y gobernabilidad, tendiendo puentes entre geografía y política,…
A multidimensional model based on the Choquet integral to evaluate performance of waterfront redevelopment projects in promoting local growth
2012
The paper aim to construct a multi-criteria model assessing the suitability of waterfront development scenarios to contribute to local growth. The model applies to the city of Catania. It is built according to the strategic directions on territorial government recognized by European Community for Sicily. The evaluation model includes a set of strategic criteria for local social and economic sustainability. The aesthetic and functional regeneration of urban waterfront areas is a very complex issue because of the manifold social, environmental and economic implications. The choice among different alternatives of redevelopment of such a kind of areas should be addressed with typical techniques…
Integration of Pedagogical Knowledge in the Light of Questions about the Empirical Foundations of General Pedagogy and Understanding of the Concept o…
2018
Głównym celem artykuły jest pokazanie, że podejmowane przez pedagogów badania zarówno nad empirycznymi podstawami pedagogiki, jak i nad ogólnością, posiadają punkty styczne oraz, że pogłębiona refleksja nad tymi zagadnieniami ukierunkowuje na postulat integralnego traktowania wiedzy pedagogicznej. W pierwszej części została przedstawiona relacja między kwestią empirycznych podstaw pedagogiki a problematyką integralności wiedzy pedagogicznej, w drugiej – między pojęciem ogólności a problematyką tejże integralności, natomiast w zakończeniu zaprezentowano propozycję rozumienia pedagogiki ogólnej jako pedagogiki integralnej, w której elementem integrującym jest sposób podejścia zarówno do empir…
The application of a reduced volume method for the simulation of the characterisation of a carbon fibre pressure vessel
2018
International audience; The characteristics of advanced composite materials make them ideally suited for use in pressure vessels for storing gas as fuel for ground transport vehicles. It has been found that the failure process starts with randomly distributed fibre breaks and as the loading continues, they coalesce into clusters of fibre breaks which lead to failure [4]. However, improvements are needed to reduce computational times when performing full-scale simulations. The reduced volume method is therefore applied to the stochastic fibre break model related to the concept of an integral range. This method allows the calculation for a certain volume of a laminate that statistically repre…
Fixed point results for α-implicit contractions with application to integral equations
2016
Recently, Aydi et al. [On fixed point results for α-implicit contractions in quasi-metric spaces and consequences, Nonlinear Anal. Model. Control, 21(1):40–56, 2016] proved some fixed point results involving α-implicit contractive conditions in quasi-b-metric spaces. In this paper we extend and improve these results and derive some new fixed point theorems for implicit contractions in ordered quasi-b-metric spaces. Moreover, some examples and an application to integral equations are given here to illustrate the usability of the obtained results.
Analytical and quasi-analytical solutions of direct problems in eddy current testing
2014
Elektroniskā versija nesatur pielikumus
Spherical harmonic expansion of fundamental solutions and their derivatives for homogenous elliptic operators
2017
In this work, a unified scheme for computing the fundamental solutions of a three-dimensional homogeneous elliptic partial differential operator is presented. The scheme is based on the Rayleigh expansion and on the Fourier representation of a homogeneous function. The scheme has the advantage of expressing the fundamental solutions and their derivatives up to the desired order without any term-by-term differentiation. Moreover, the coefficients of the series need to be computed only once, thus making the presented scheme attractive for numerical implementation. The scheme is employed to compute the fundamental solution of isotropic elasticity showing that the spherical harmonics expansions…