At least two types of ageing processes affect digital records: media ageing and semantic ageing. We argue that the main challenges for digital preservation arise from semantic ageing, that is, the evolution of data formats. The article analyzes a type of document that is particularly vulnerable to semantic ageing: the digital maps produced by researchers on built heritage which combine spatial ...

the 17-4ph alloy is a martensitic stainless steel with 3–5 wt% cu, strengthened by the precipitation hardening. due to excellent mechanical properties, corrosion resistance and ease of heat treatment, this alloy has unique applications in nuclear power plants and marine constructions. in this paper, the influence of ageing heat treatment, solution annealing followed by ageing at 480, 550 and 62...

Textbooks and policy documents tend to present the boundary between normal and abnormal ageing as natural and clearly demarcated. In this study, we trouble the notion of natural and clearly demarcated boundaries between normal and abnormal ageing by considering how these boundaries have been established and maintained in present-day Western contexts. We draw on both Canguilhem's discussion of t...

OBJECTIVE to identify perceptions of, and associations with, active ageing among ethnically diverse and homogeneous samples of older people in Britain. DESIGN AND SETTING cross-sectional and longitudinal surveys of older people living at home in Britain. MEASURES active ageing, health, psych-social, socio-economic circumstances, and indicators of quality of life. RESULTS respondents defin...

background: the prevalence of polycystic ovarian syndrome (pcos) particularly is increased in adolescents. very few longitudinal follow-up for assessment of ovarian reserve in women of late reproductive age with previously confirmed pcos have been conducted, especially after its diagnosis and treatment in adolescence. objective: the aim of the present study was to compare of the ovarian reserve...

The Human Ageing Genomic Resources (HAGR) is a collection of online resources for studying the biology of human ageing. HAGR features two main databases: GenAge and AnAge. GenAge is a curated database of genes related to human ageing. Entries were primarily selected based on genetic perturbations in animal models and human diseases as well as an extensive literature review. Each entry includes ...

Objective: to identify perceptions of, and associations with, active ageing among ethnically diverse and homogeneous samples of older people in Britain. Design and setting: cross-sectional and longitudinal surveys of older people living at home in Britain. Measures: active ageing, health, psych-social, socio-economic circumstances, and indicators of quality of life. Results: respondents defined...

INTRODUCTION In the context of an increasingly ageing society with a growing number of persons diagnosed with chronic disabling conditions including dementia and persons with disabilities, ageing and disability represent two policy fields which need to be jointly re-thought. So far, policymakers and other political actors have not adequately reacted to these changing demographics. DESCRIPTION...