We calculate the polarization correlation function in the Einstein-Podolsky-Rosen-type experiments with relativistic spin-1/2 particles. This function depends monotonically on the particle momenta. Moreover, we also show that the polarization correlation function violates the Clauser-Horn-Shimony-Holt inequality and the degree of this violation can depend on the particle momenta and the motion of observers.

It is very well known that cold-formed steel structures are usually made by thinwalled members of class 4 sections and they are characterised by a reduced post-elastic strength and by a reduced ductility. Since these sections are prematurely prone to local or distortional buckling and they do not have a real post-elastic capacity, the failure at ultimate stage of such members, either in compression or bending, always occurs by forming a local plastic mechanism [1]. This fact suggests the possibility to use the local plastic mechanism to characterise the ultimate strength of such members.The yield line mechanism analysis has been widely used to study steel members and connections that involve local collapse mechanisms. This method can be used to study post-elastic behaviour, load-carrying capacity, ductility, rotation capacity and energy absorption. A detailed history of yield line mechanism theory has been presented by Zhao [2]. An art review of the application of yield line analysis to cold-formed members has been presented by Hiriyur & Schafer [3] and Ungureanu et al. make an inventory, classify and range geometrical and analytical models for the local-plastic mechanisms aiming to characterize the ultimate capacity of some of the most used cold-formed steel sections in structural applications [4]. Present paper is based on previous studies and on some latest investigations of authors, as well as the literature collected data. It represents an attempt to study the plastic mechanisms for members in eccentric compression.The approach is a numerical one, in order to identify the plastic mechanisms of members subjected to eccentric compression about minor axis and the evolution of plastic mechanisms, considering several types of lipped channel sections (see Fig. 1). Also, positive and negative eccentricities along the symmetry axis will be investigated, i.e. -10 mm, -5 mm, -2 mm, -1mm, 0 mm, +1 mm, + 2 mm, +5 mm, +10 mm and +20 mm, as shown in Fig. 1.

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Effects of cellulase enzymatic treatment followed by mechanical beating were evaluated relative to the properties of cellulase-derived tissue pulps and handsheets. When different cellulase concentrations (0.0012 FPU/g, 0.0018 FPU/g, and 0.0024 FPU/g) of oven dried pulp (a 65/35 w/w ratio of beech to eucalyptus) were used for tissue production, a slight deterioration of the morphological characteristics was observed. Thus, a possibility of controlling the changes in the degree of polymerization of cellulose, as well as the fiber properties (in particular the length and coarseness) appeared. With an increased treatment time and enzyme concentration, these effects increased. The enzyme activity did not affect the apparent density of the paper, but the porosity drastically increased. The zero-span strength of the enzymatically treated pulps decreased with an increase in treatment time and amount of cellulase. However, mechanical beating improved the bonding between the cellulase fibers, which helped prevent the eventual decrease in mechanical properties of the handsheets. With the use of cellulase, the proposed moderate changes to fiber structure were achieved, giving the possibility of predicting and controlling the properties of tissue paper.

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