We describe a new construction of an incoherent dictionary, referred to as the oscillator dictionary, which is based on considerations in the representation theory of finite groups. The oscillator dictionary consists of approximately p unit vectors in a Hilbert space of dimension p, whose pairwise inner products have magnitude of at most 4/ √ p. An explicit algorithm to construct a large portio...

Very little is known about how differences in use and perceptions of urban green space impact on the general health of black and minority ethnic (BME) groups. BME groups in the UK suffer from poorer health and a wide range of environmental inequalities that include poorer access to urban green space and poorer quality of green space provision. This study used a household questionnaire (n = 523)...

abstract   when the human habitat can provide more utility to a man who meets his expectations. the expectations are defined in all aspects of environmental, social, physical, economic situation and so on in residential places. if any of these desirable qualities are lacking in a person's life, will affect both the perception and feeling of space and the level of satisfaction from quality ...

There has been considerable work done in recent years exploring the value of urban green space for health and wellbeing. Urban green spaces provide environmental benefits through their effects on negating urban heat, offsetting greenhouse gas emissions, and attenuating storm water. They also have direct health benefits by providing urban residents spaces for physical activity and social interac...

Generalising about urban governance and the urban poor across most of the globe is unhelpful. Unfortunately, I see far too many current examples of that disease. Latin America is not China and is most certainly not like most of Africa or the Indian subcontinent. A recent paper in this journal argued that every city in the South suffers from poor and corrupt management. While accepting that such...

Urban park is an important component of urban public green space which provides leisure, recreation, activity place, etc. Urban park service quality was evaluated by quantitative method in this paper to provide scientific evidence for renewal and development of urban park. 5 urban parks in Xinxiang, Henan province, China were selected as evaluation samples, and 13 indexes were evaluated, includ...