Resonantly Forced Inhomogeneous Reaction-Diffusion Systems

The dynamics of spatiotemporal patterns in oscillatory reaction-diffusion systems subject to periodic forcing with a spatially random forcing amplitude field are investigated. Quenched disorder is studied using the resonantly forced complex Ginzburg-Landau equation in the 3:1 resonance regime. Front roughening and spontaneous nucleation of target patterns are observed and characterized. Time dependent spatially varying forcing fields are studied in the 3:1 forced FitzHugh-Nagumo system. The periodic variation of the spatially random forcing amplitude breaks the symmetry among the three quasi-homogeneous states of the system, making the three types of fronts separating phases inequivalent. The resulting inequality in the front velocities leads to the formation of ``compound fronts'' with velocities lying between those of the individual component fronts, and ``pulses'' which are analogous structures arising from the combination of three fronts. Spiral wave dynamics is studied in systems with compound fronts.Comment: 14 pages, 19 figures, to be published in CHAOS. This replacement has some minor changes in layout for purposes of neatnes

The Effect of Diffuse Light on Crops

Light is not evenly distributed in Dutch glass greenhouses, but this can be improved with diffuse light. Modern greenhouse coverings are able to transform most of the light entering the greenhouse into diffuse light. Wageningen UR Greenhouse Horticulture has studied the effect of diffuse light on crops for several years. Modelling and experimental studies showed that crops such as fruit vegetables with a high plant canopy as well as ornamentals with a small plant canopy can utilize diffuse light better than direct light. Diffuse light penetrates the middle layers of a high-grown crop and results in a better horizontal light distribution in the greenhouse. Diffuse light is absorbed to a better degree by the middle leaf layers of cucumber, resulting in a higher photosynthesis. The actual photosynthesis of four pot plant species was found to be increased and crop temperatures were lower during high irradiation. The yield of cucumbers was increased, and the growth rate of several potted plants was increased. These investigations have resulted in a quantitative foundation for the potentials of diffuse light in Dutch horticultural greenhouses and the selection and verification of technological methods to convert direct sunlight into diffuse light

'No offence to God but I don't believe in Him': religion, schooling and children's rights

Since the Children Act (2004) in both England and Wales, schools are expected to give due attention to the issue of children’s rights, particularly respect for the views of pupils in matters that affect them, as outlined in Article 12 of the UNCRC. However, one theme that has been relatively unexplored in the literature on children’s rights and education is religion and the role it plays in everyday school life, an issue that has relevance for Article 12, but also Article 14, which refers to freedom of thought, conscience and religion. This article approaches the topic of religion, schooling and children’s rights empirically, through a focus on rural church schools. It draws on in-depth qualitative research with pupils and other stakeholders from two case study schools in order to explore the significance of ethos values and experiences of religious practices for debates in this area

Renegotiating the Primary School:Children's Emotional Geographies of Sport, Exercise and Active Play

The current UK policy concern with children's health has led to primary school practices of sport, exercise and active play aimed, in particular, at constructing children's bodies as ‘healthy’. Qualitative explorations of children's own values and experiences however, reveal that their understandings of sport in school differ considerably from its potential to be healthy, instead emphasising emotional geographies of pleasure and enjoyment. This article aims to develop a better understanding of children's ability to modify and reconstitute discursive corporeal regimes through their own agency, thus highlighting the fluid nature of the primary school as an institution. Adult discourses and children's bodily challenges to these mingle and intersect, creating spaces of competing values and discourses that work to transform and renegotiate the primary school. Although this article focuses particularly on the UK context, the findings will be relevant for any country in which child obesity is of current concern for social and education policy

Meaningful encounters? Religion and social cohesion in the English primary school

Recent debates about state-funded faith schools in England have focused on the way in which they either promote or discourage social cohesion between different cultural, ethnic and religious groups. While one argument suggests that children must experience interfaith and intercultural encounters in order to understand each other, another insists that values of tolerance and acceptance can instead be taught as part of the curriculum. Despite this, much research to date has tended to focus on macro-processes such as selection procedures and residential segregation at the expense of micro-processes within school space itself. This article seeks to address this conspicuous lack of empirical research, by drawing on qualitative fieldwork in a state-funded Community primary school and Roman Catholic primary school located in multi-faith districts of an urban area in the North of England. It will examine a number of ways in which the two schools tried to encourage positive and meaningful encounters between children of different religious backgrounds, as well as the extent to which such attempts were successful. The article will focus particularly on the role of bodies and emotions in making sense of these processes

Childhood, youth and non-religion:Towards a social research agenda

Popular and academic interest in the phenomenon of ‘non-religion’, including atheism, humanism and agnosticism, is currently on the rise, reflected in the proliferation of social research on this important theme. Yet, despite a parallel growth in scholarship on childhood, youth and religion, little interest has so far been directed towards non-religion in this context. This article brings together these two concerns through a review of research themes concerned with non-religion and their potential relevance for childhood and youth studies. In so doing, it maps out an agenda for future social research in the field of childhood, youth and non-religion