Transition patterns between different sleep stages are analysed in terms of probability distributions of symbolic sequences for young and old subjects with and without sleep disorder. Changes of these patterns due to ageing are compared with variations of transition probabilities due to sleep disorder.

The study's purpose was to identify the mediating role of intention and the stages of change (SOC) in physical activity (PA) over a 6-month period using two models (theory of planned behavior [TPB] and TPB/SOC). Participants were 143 adults with physical disabilities (70.68% response rate; M age = 46.03). The TPB constructs, SOC (time 1), and PA (time 2) were assessed using standardized self-re...

The homogenization of a passive ‘tracer ’ in a flow with closed mean streamlines occurs in two stages: first, a rapid phase dominated by shear-augmented diffusion over a time z @ ( L / U ) , where the €’Met number P = LU/K (L, U and K are lengthscale, velocity scale and diffusivity), in which initial values of the tracer are replaced by their (generalized) average about a streamline ; second, a...

In this paper, we develop nonlinear constitutive equations and resulting system models quantifying the nonlinear and hysteretic field-displacement relations inherent to lead zirconate titanate (PZT) devices employed in atomic force microscope stage mechanisms. We focus specifically on PZT rods utilizing d33 motion and PZT shells driven in d31 regimes, but the modeling framework is sufficiently ...

Bones are living organs with the ability to adapt themselves to their mechanical demands. This phenomenon is of great importance in endoprosthetics. Due to a total hip joint replacement for example the bone is stressed in a non–physiological manner which causes bone remodeling. Therefore, the durability of the artificial device depends strongly on the prosthesis design. This biomechanical behav...

one small-scale double emulsion technique for incorporation of naja- naja oxiana venom into poly (lactide-co-glycolide) (plga) microspheres were developed and optimized. the effects of high speed homogenization on the double emulsion stability, microsphere size, entrapment efficiency and in vitro release of venom were studied. a stable double emulsion was verified by homogenization method. slow...

We consider the computation of averaged coefficients for the homogenization of elliptic partial differential equations. In this problem, like in many multiscale problems, a large number of similar computations parametrized by the macroscopic scale is required at the microscopic scale. This is a framework very much adapted to model order reduction attempts. The purpose of this work is to show ho...

The existing methods for analyzing the behaviors of lattice materials require high computational power. homogenization method is alternative way to overcome this issue. Homogenization an analysis understand behavior area material from a small portion rapid and precise approximation. This paper provides summary some representative methodologies in homogenization.

Using multiscale models and homogenization methods the elastic properties of two important musculoskeletal mineralized tissues, the mineralized turkey leg tendon (in short mineralized tendon) and the osteon, are modeled and simulated at different length scales. Our first aim is to find homogenization methods which predict the apparent elastic properties of the investigated tissues numerical acc...