Partial Mueller matrix polarimeter using liquid crystal modulators.

A simple partial Mueller polarimeter is described, consisting of two linear polarizers and two liquid crystal variable retarders. The measurement leads to an incomplete Mueller-Scierski matrix, in which the elements from the third row and the third column are simultaneously missing. The proposed procedure for determining information about the birefringent medium from such an incomplete matrix is based on numerical methods and carrying out measurements with the rotated azimuthal sample.

Influence of pregnancy related anthropometric changes on plantar pressure distribution during gait-A follow-up study.

Background: As foot constitutes the base of support for the whole body, the pregnancy-related anthropometric changes can result in adaptive plantar pressure alterations. The present study aimed to investigate how pregnancy affects foot loading pattern in gait, and if it is related to body adjustments to growing foetus that occur in the course of pregnancy.

Methods: A prospective longitudinal study included 30 women.

Pelvic movements during walking throughout gestation - the relationship between morphology and kinematic parameters.

Background: Many researchers emphasize adaptations following pregnancy. Our purpose was to get more insight into how morphology interacts with the pelvic walking pattern - the segment most prone to the adaptation following altered body demands.

Methods: Thirty women were enrolled.

Does the first trimester of pregnancy induce alterations in the walking pattern?

Introduction: From among many studies observing the walking pattern throughout pregnancy, only two items monitor the influence of pregnancy on the movement system during gait considering the period before gestation.

Research Question: Does the women's gait pattern at the end of the first trimester undergo changes in comparison to body movement pattern before pregnancy?

Methods: All subjects who met the inclusion criteria gave signed and informed consent before the study. Two experimental sessions were arranged according to the same protocol: (P0) before pregnancy and (P1) at the end of the first trimester of pregnancy (12th week of gestation).

Progressive changes in walking kinematics throughout pregnancy-A follow up study.

Background: Progressive weight gain and changes in its distribution following pregnancy may be challenging for the gravidas' ability to move in a stable way.

Research Question: How is gait kinematics changing throughout pregnancy and to what extend is it affected by physical activity level and energy balance?

Methods: 30 women were enrolled. Three experimental sessions were arranged according to the same protocol in the first, second and third trimesters of pregnancy.