نتایج جستجو برای ' UES '

 Computers have become ubiquitous during our lifetimes and the life of our journal. Computers can help us to reflect on our own intellectual foundations and on our words, action and research, seen from inside and outside. Individuals can make a difference, making use of computers as tools, trying to make sense of the world, with the possibility of breaking the mould, and of empowering others. There can be a cost, which is sometimes seen as part of a Faustian exchange.

 Despite the EU Stability & Growth Pact and existing constitutional limits on public deficit/debt at the (sub)national level in many EU member countries, in the wake of the 2010 Greek bailout, many politicians and policy advisors have proposed new constitutional “debt brakes” to prevent future fiscal crises and bailouts. This paper puts a question mark behind this popular policy recommendation. Public choice scholars and other critical observers have repeatedly emp...

 The catalytic oxidation of 2-aminophenol (OAP) to 2-amino-3H–phenoxazin-3-one (APX, Questiomycin A) was the object of numerous studies partly due to antimicrobial properties of Questiomycin A and mostly because it can be used as a model for the synthesis of the naturally occurring antineoplastic agent Actinomycin D. Several copper complexes were used as dioxygen and/or substrates activators in order to mimic the activity of phenoxazinone synthase, but the reported assays failed to pr...

 Blended cements are largely used for concrete: they are usually considered cements with a low environmental impact, as they require less clinker than ordinary Portland cement (OPC). Different constituents can be used as supplementary clinker component usually leading to cement with high resistance to outdoor environment. Polishing residue (PR), coming from porcelain stoneware tiles production, can be successfully used as new constituent for blended cement, however its action for enhancing ...

 The connectivity of the capillary porosity in cement-based materials impacts fluid-and-ion transport and thus material durability, the interpretation of experimental measurements such as chemical shrinkage, and the timing and duration of curing operations. While several methods have been used to assess the connectivity of the capillary pores, the interpretation of some experimental procedures can be complicated by the addition of certain chemical admixtures. This paper assesses capillary p...

 In Microfluidics, a large deviation in the published experimental data on the dynamic and thermal behavior of microflows has been observed with respect to the classical theory but, from a chronological analysis of these experimental results, it can be realized how the deviations in the behavior of fluid flows through microchannels from that through large-sized channels are decreasing. Today, it seems to be clear that some of the inconsistencies in the data were originated from the experime...

 Some spectral problems for differential operators are naturally posed on the whole real line, often leading to eigenvalues plus continuous spectrum. Then the numerical approximation typically involves three processes: (a) reduction to a finite interval; (b) discretization; (c) application of a numerical eigenvalue solver such as the QR-algorithm. Reduction to a finite interval and discretization typically eliminate the continuous spectrum. However, through round-off error, the continuous ...

In this paper new explicit expressions for both kinds of Comtet numbers and some interesting special cases are derived. Moreover, we define and study the generalized multiparameter non-central Stirling numbers and generalized Comtet numbers via differential operators. Furthermore, recurrence relations and new explicit formulas for those numbers are obtained. Finally some interesting special cases, new combinatorial identities and a connection between these numbers and some interesting polynomial...

 Global optimization methods including particle swarm optimization are usually used to solve optimization problems when the number of parameters is low (hundreds). Also, to be able to find a good solution typically involves multiple evaluations of the objective (or cost) function. Thus, both a large number of parameters and very costly forward evaluations hamper the use of global algorithms in inverse problems. In this paper, we address the first problem showing that the sampling can b...