ماهنامه پیام آبادگران
سال بیست و هفتم شماره 34 (پیاپی 264، امرداد 1388)

We adopt the general theory of Non-equilibrium thermodynamics to the two-fluid Model of He-II. In this Model superfluid is considered as a fluid of two-components each of with its own density and velocity fields. In contrast to the earlier works, our model assumes that super-fluid carries small entropy (), owing to the Fliessbach. Since the fluid has two independent velocity fields, there is no preferred frame of references and hence, no unique definition of internal energy. The explicit forms of this quantity are worked out in different models and compared with our definition of internal energy and Gibbs function. The existing relation and unification together with the equivalency of London and Landau’s theories is also introduced.

A latent variable Markovian model is proposed for longitudinal binary responses with dropout. In this model responses can easily be modeled using probit, logit or any other link. Dropout model is parameterized in such a way that parameters can be dynamically changed on time. Some residuals are also presented. These residuals can be used in the presence of informative dropout. The model is also used in an application where the existence of side effects of using fluvoxamine (a treatment for deregulation of serotonin in the brain) is the response of interest.