For compact self-adjoint operators in Hilbert spaces, two algorithms are proposed to provide fully computable a posteriori error estimate for eigenfunction approximation. Both apply well the case of tight clusters and multiple eigenvalues, under settings target eigenvalue problems. Algorithm I is based on Rayleigh quotient min-max principle that characterizes The formula provided by easy comput...

Purpose The purpose of this paper is to present an innovative approach for the strategic design public–private partnerships (PPP) and private finance initiatives (PFI) based on ontology. Design/methodology/approach Adopting a historic approach, it introduces posteriori knowledge, deriving from scheme’s stakeholders at construction implementation phase PPPs. Continuous failures these collaborati...

In this paper, we investigate the use of brain activity for person authentication. It has been shown in previous studies that the brain-wave pattern of every individual is unique and that the electroencephalogram (EEG) can be used for biometric identification. EEG-based biometry is an emerging research topic and we believe that it may open new research directions and applications in the future....

Consider a sequence {xn}n—Q in a normed space X converging to some x* £ X. It is shown that the sequence satisfies a condition of the type ||x* -x„|| < oi||xn xn_¡\\ for some constant a and every n > 1, if the associated null sequence {e„}„=q, en = x* — xn, is uniformly decreasing in norm or if it is alternating with respect to any ordering whose cone of positive elements is acute.

It is shown that the enormous improvement in the size of disk storage space in recent years can be used to build multiple word-domain statistical language models, one for each significant word of a language. Each of these word-domain language models is a precise domain model for the relevent significant word and when combined appropriately they provide a highly specific domain language model fo...

This paper presents a posteriori error estimates for the hp{version of the boundary element method. We discuss two rst kind integral operator equations , namely Symm's integral equation and the integral equation with a hypersingular operator. The computable upper error bounds indicate an algorithm for the automatic hp{adaptive mesh{reenement. The eeciency of this method is shown by numerical ex...