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The dynamics of fluid - saturated porous rock is a particularly interesting problem in geophysics and hydrology, nevertheless it is very important in environmental protection as well since it is able to describe, in a lot of situations, the propagation of pollutant substances dissolved in porous environmental matrices. It has been show that, for these systems, the nonlinear effects can be very important to consider. In this paper we'll discuss two novel approaches to the study of the above dynamics: one based on constitutive and conservation equations, the other considering the mass - balance equations for the solute flow and for adsorption rate of solute on the poroelastic matrix. We have shown the first model correctly describes the nonlinear behavior of the fluid pore pressure and pollutants concentration while the second gives the nonlinear term describing advection of which some numerical solutions has been calculated.

The study reported in this paper is devoted to the characterization, by thermal analysis, of human bones stored at different temperatures. Two types of bone were used, the first healthy and the second one osteoarthritis. The results reported are referred to analysis of the DSC patterns and TG, DTG values of the specimens of femoral-head banked at -30 °C and -80 °C immediately after the surgical removal or washed with acetone and then stored. These treatments must be performed immediately after the surgery in order to prevent the degradation of the collagen protein, i.e. collagenases. The thermodynamic differences between the healthy and the pathological bones add to biological contraindication as to why the osteoarthritis bone cannot be utilized for allograft.

The purpose of this paper is to generate insights into how multinational companies (MNCs) promote global mobility in their Employer Branding (EB) messages on Facebook.

The authors analyzed 13.340 EB messages found on the Facebook career pages of 30 major MNCs (10 of each in the US, UK and Germany) drawing on a methodological approach combining Grounded Theory and text-mining.

Building on the perspective of psychological contracts as sensitizing concept, the analysis of the overall sample reveals a range of core themes in EB messages across all MNCs studied. With regards to global mobility, MNCs emphasize relational, i.e. socio-emotional, contents, particularly, highlighting opportunities of experience and personal development. While global mobility is an overall marginal theme, German MNCs extensively promote global mobility, whereas US- and UK-based MNCs do not explicitly make it a subject of their messages. The findings are discussed in the light of institutional theory.

Despite mega-trend, little is known about social media EB, especially when it comes to the contents that MNCs communicate to (potential) employees. Applying an innovative methodological approach, the authors offer insights into these contents. Discussing the findings in the light of institutional theory, it is concluded that promoting global mobility in socio-emotional terms seems of high importance to reduce uncertainties associated with living and working abroad. This might help firms to hire internationally mobile employees, especially in countries where job mobility is generally low.