Roofs like other portions of buildings expand and contract with temperature changes in various climates and seasons. Regardless of outside temperature conditions there is almost no contraction and expansion in the roof described. Means and methods are devised for excluding all moisture from roof joints, thus the freezing and thawing conditions which usually exist are here absent. Unlike other roofs there is no overall expansion and contraction to open cracks to receive dampness, or to require roof repair or replacement. This is a permanent non expanding and non contracting roof structure.
This paper summarises the economic literature on modelling take-up, with a focus on income-related or work-related benefits or tax credits. It gives a framework for thinking about aggregate measures of take-up rates, and shows how existing studies dier from each other in their data requirements and modelling complexity. It also shows how models of non-take-up, when appropriate data are available, can account for measurement and expectational errors, and how they can value the costs of claiming and receiving some benefits.
Background ::: Muscle contractures are developing during childhood and may cause extensive problems in gait and every day functioning in children with cerebral palsy (CP). The aim of the present study was to evaluate how the popliteal angle (PA) and hamstrings spasticity change during childhood in walking children with spastic bilateral CP.