Linear and nonlinear fractional hereditary constitutive laws of asphalt mixtures

The aim of this paper is to propose a fractional viscoelastic and viscoplastic model of asphalt mixtures using experimental data of several tests such as creep and creep recovery performed at different temperatures and at different stress levels. From a best fitting procedure it is shown that both the creep one and recovery curve follow a power law model. It is shown that the suitable model for asphalt mixtures is a dashpot and a fractional element arranged in series. The proposed model is also available outside of the linear domain but in this case the parameters of the model depend on the stress level

Clinical and cytogenetic examinations of patients with transsexualism

Patients with male and female transsexualism were examined using clinical, cytogenetic, gametological and morphological methods. All patients were shown to possess normal karyotype without disorders in chromosome number or structure. Signs of sclerocystic ovaries were detected in 25% of patients with female transsexualism before treatment; after androgen therapy of 1 to 3 years signs of sclerocystic ovaries and folliculogenesis suppression were observed in 100% cases. All the patients with male transsexualism presented with spermatogenesis in the form of oligoasthenoteratozoospermia and degeneration of immature sex cells before therapy.</jats:p