Accommodating change

The question of whether changes in corneal curvature occur with changes in viewing distance has long been debated, with several previous studies (Bannon, 1971; Fairmaid, 1959; Lopping & Weale, 1965; Mandell & Helen, 1968) failing to observe a change in corneal shape during accommodation when convergence was controlled.Using the technology available to them more than 30 years ago, these investigators reached their conclusions based on radii measurements of only a small, central region of their subjects’ corneas (Bannon, 1971; Fairmaid, 1959; Lopping & Weale, 1965) or on an early imprecise placido disk system (Mandell & Helen, 1968).To smoothen the path to implementation, circular building principles may be combined with Design-for-Adaptability (Df A) guidelines, as developed over the last decades.Df A guidelines are rooted in enhanced resilience of the built environment on the one hand, and the associated constructive implications on the other.Modern creationism was born only in the twentieth century, largely through the efforts of the Canadian adventist George Mc Cready Price.

The implications for the supply and value chain, however, are significant, and research in this direction has only recently taken off.

Synergy between the concepts of , with regard to the Dutch context, is at the heart of this paper.

The main research question is: what are prerequisites for an effective performance of materials, products, services and buildings in the case circularity is a leading ambition?

, radically altering the way material flows need to be managed.

The notion of material banks (temporary storage of materials that comprise the building assemblies) sheds new light on the value of building materials and products, and how to maintain and restore this.

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