Play, as a practise which has a huge impact on individual human growth and social relationships, has been researched in contexts of multiple disciplinary fields. Theories of play have been developed in different realms and instructed the design of diverse play spaces. Specific architectural typologies as well as general principles of urban planning have been taking inspirations from the migrated idea of ‘play’. However, few studies or practices have explored how ‘play’ can be applied on a neighbourhood level as a solution to the poor development of both its residents and the community itself. This paper takes Feijenpoort area as a research subject to address the missing intermediate dimensions in the migration of ‘play’. Through historical research this paper argues a correlation of the emergence of new behavioural and spatial play to the social condition. A new design program of ‘play-cycle’ is proposed after comparative studies of existing play space typologies to revitalise the neighbourhoods through positive participation of its young population.

Three upcoming Martian missions will deploy a ground-penetrating radar (GPR) to reveal the fine-resolution subsurface structure and dielectric properties of materials beneath the surface. Numerical forward simulations of radar echo using a model of the near-surface structure at the landing site can provide a valuable reference for processing and interpretation of future radar data collected on Mars. In this study, based on the geological information of the Jezero crater, a detailed stratigraphic model of the near-surface structure is derived, which includes several key features, for example, the randomness of the medium, terrain, and cracks. To identify correctly the reflections of subsurface interfaces and fractures from the radar image, a v(z) f-k migration is carried out, the performance of which is evaluated using the GPR data obtained near Antarctic Zhongshan Station since the electrical properties of Antarctic glaciers and Martian materials are to some extent comparable. The results in this work show that compared with common migration algorithm, the v(z) f-k method not only improves the clarity of radar image but also provides the permittivity profiles to infer the composition of the substrate, leading to a better understanding of Martian near-surface geology.

@en