Abstract The quality of surface waters in the territory Poland, despite implemented remedial measures, is mostly classified as bad. This article presents results research on composition water macroelements 24 artificial reservoirs located Opole province (southern Poland), searching for reasons behind their pollution. Concentrations anions F − , Cl Br NO 2 3 PO 4 3− and SO 2− cations Na + NH K M...

This work proposes a new plastic-hardening, non-associative macroelement model to predict the behaviour of anchors in clay for floating offshore structures during keying and up peak load. Building on available models anchors, non-associated plastic potential is introduced improve prediction anchor trajectory loss embedment at conditions large range padeye offsets different pull-out directions. ...

In order to construct a C1-quadratic spline over an arbitrary triangulation, one can split each triangle into 12 subtriangles, resulting in a finer triangulation known as the Powell-Sabin 12-split. It has been shown previously that the corresponding spline surface can be plotted quickly by means of a Hermite subdivision scheme [5]. In this paper we introduce a nodal macroelement on the 12-split...

Abstract Aim The study was undertaken to determine the effect of amendments used in remediation cobalt-contaminated soil on macroelement content all organs spring barley (the main crop) and white mustard after-crop). Methods In experiment, six blocks were selected: without amendments; with manure (bovine, granulated); clay; charcoal; zeolite; calcium oxide (50%). each blocks, increasing doses c...

Unreinforced masonry (URM) buildings are susceptible to extraordinary actions such as earthquakes compared steel or reinforced concrete buildings. Various methods have been developed for the computational analysis of URM in last few decades. The equivalent frame method (EFM) is one numerical modeling approaches widely used nonlinear analyses Different macroelements context EFM proposed. However...

We propose two algorithms of two-level methods for resolving the nonlinearity in the stabilized finite volume approximation of the Navier-Stokes equations describing the equilibrium flow of a viscous, incompressible fluid. A macroelement condition is introduced for constructing the local stabilized finite volume element formulation. Moreover the two-level methods consist of solving a small nonl...

Based on the low-order conforming finite element subspace (Vh, Mh) such as the P1-P0 triangle element or the Q1-P0 quadrilateral element, the locally stabilized finite element method for the Stokes problem with nonlinear slip boundary conditions is investigated in this paper. For this class of nonlinear slip boundary conditions including the subdifferential property, the weak variational formul...