.............................................................................................................................. iii Publications arising from this thesis ....................................................................... vi Section 1: Introduction and methods ....................................................................... 7 Chapter 1. General Introduction ..............

The hardness variation and the behaviour of precipitation during the process of three stage ageing of three Al-Cu-Mg alloys were investigated using micro-hardness and differential scanning calorimetry (DSC). To facilitate the determination of the optimised heat treatment condition, a uniform design method was employed by which the influences of three stages interrupted ageing on the hardness an...

We review the use of kinetically constrained models (KCMs) for the study of dynamics in glassy systems. The characteristic feature of KCMs is that they have trivial, often non-interacting, equilibrium behaviour but interesting slow dynamics due to restrictions on the allowed transitions between configurations. The basic question which KCMs ask is therefore howmuch glassy physics can be understo...

OBJECTIVES The aim of the study was to describe the ageing HIV-infected population (> 50 years old) and their current antiretroviral therapy (ART), comorbidities and coprescriptions in France in 2013 and to compare them to the younger population. METHODS A retrospective analysis of a prospectively collected database was performed. The characteristics of patients receiving ART as well as their...

Dr. G.E. Piérard, Department of Dermatopathology, CHU Sart-Tilman, B-4000 Liège (Belgium) The unprecedented size of the elderly population com Chronologic ageing Genetic ageing Photoageing Behavioral ageing Catabolic ageing, Type Endocrine ageing Gravitational aseins pels research to understand the physiological changes related to skin ageing. A classical, yet oversimplified classification of c...

Given a set  of  points in the plane and a constant ,-center problem is to find two closed disks which each covers the whole , the diameter of the bigger one is minimized, and the distance of the two centers is at least . Constrained -center problem is the -center problem in which the centers are forced to lie on a given line . In this paper, we first introduce -center problem and its constrain...

To date five different theories compete in explaining the biological mechanisms of senescence or ageing in invertebrates. Physiological, genetical, and environmental mechanisms form the image of ageing in individuals and groups. Social insects, especially the honeybee Apis mellifera, present exceptional model systems to study developmentally related ageing. The extremely high phenotypic plastic...