Quantitative Analysis of Suffix Variability of Comparative Adjectives in Russian

There are two variants of the productive suffix of comparative adjectives used in modern Russian. They are a full two-syllable form and a reduced one-syllable suffix. Both variants are normative. However, they are slightly different in terms of stylistics. The suffix -ee makes the word sound neutral and the word with the suffix -ei sounds more colloquial. The article presents a quantitative study of variability of the suffixes of comparative adjectives and analyzes linguistic and extralinguistic factors that influence the frequency of the variants. The authors concluded that there is no previously anticipated influence of phonetic and morphological factors on the choice of the suffix of an adjective in a bookish speech

Archimedean-type force in a cosmic dark fluid: II. Qualitative and numerical study of a multistage Universe expansion

In this (second) part of the work we present the results of numerical and qualitative analysis, based on a new model of the Archimedean-type interaction between dark matter and dark energy. The Archimedean-type force is linear in the four-gradient of the dark energy pressure and plays a role of self-regulator of the energy redistribution in a cosmic dark fluid. Because of the Archimedean-type interaction the cosmological evolution is shown to have a multistage character. Depending on the choice of the values of the model guiding parameters,the Universe's expansion is shown to be perpetually accelerated, periodic or quasiperiodic with finite number of deceleration/acceleration epochs. We distinguished the models, which can be definitely characterized by the inflation in the early Universe, by the late-time accelerated expansion and nonsingular behavior in intermediate epochs, and classified them with respect to a number of transition points. Transition points appear, when the acceleration parameter changes the sign, providing the natural partition of the Universe's history into epochs of accelerated and decelerated expansion. The strategy and results of numerical calculations are advocated by the qualitative analysis of the instantaneous phase portraits of the dynamic system associated with the key equation for the dark energy pressure evolution.Comment: 15 pages, 12 figures, Part II, typos corrected, Fig.4 replaced, references correcte