Least area partition of a cylinder into three parts

The renewable energy sector is growing as states aim to curtail their carbon emissions and establish a more sustainable strategy to generate energy. Despite this, there are arguments that large-scale renewable energy developments do not contribute towards community sustainability and local economies. According to recent research, community energy projects – renewable energy projects that are part or fully owned by a geographically distinct community – are seen as a means of generating energy in a way that is more sympathetic, equitable and sustainable. This article reviews the current literature that debates the benefits and obstacles facing the community energy sector.

In a report in 2013, the Welsh Government suggested that raising the status of Physical Education (PE) to become a core subject, similar to Welsh and Mathematics, is an essential element in tackling the current obesity epidemic. However, PE lessons must be of a high quality in order to have a positive effect on pupils. PE teachers play a crucial role in delivering high-quality PE lessons; therefore, gaining an understanding of their perceptions about high-quality PE is essential. Interviews were held with ten PE teachers (seven males and three females) from Welsh-medium schools across south Wales. Similarities between the theory and teachers’ perceptions were evident, for example the importance of creating a positive learning environment. However, there were differences between the theory and practice, including lack of clarity about the term physical literacy. One implication of the study is the need to consult with PE teachers to design policies for high-quality PE. In the future, action research should be undertaken to promote the term physical literacy.

This article evaluates the potential of a range of stem cells in cardiac tissue regeneration following a heart attack. Following an initial review of relevant research, some of the main biological mechanisms involved in cardiac tissue regeneration are presented, including: the role of transcription factors, such as oxytocin and c-kit and paracrine transcription factors; studies on zebra fish that display mechanisms such as the regnerative role of cardionogen 1, 2- and 3- in reversing the effect of induced cardiac phenotypes that normally regulate heart development; delivery and engraftment mechanisms, including viral and plasmid vectors, electrical stimulation and nantoechnology. The results of in vitro and in vivo experiments are reported that have shown the clinical potential of stem cells as well as their immunological and tumorgenic risks. At the time of writing (2012), while the clinical evidence is limited, complex therapeutic models are proposed for future development in the field.