A simple, low-cost conductive composite material for 3D printing of electronic sensors

3D printing technology can produce complex objects directly from computer aided digital designs. The technology has traditionally been used by large companies to produce fit and form concept prototypes (‘rapid prototyping’) before production. In recent years however there has been a move to adopt the technology as full-scale manufacturing solution. The advent of low-cost, desktop 3D printers such as the RepRap and Fab@Home has meant a wider user base are now able to have access to desktop manufacturing platforms enabling them to produce highly customised products for personal use and sale. This uptake in usage has been coupled with a demand for printing technology and materials able to print functional elements such as electronic sensors. Here we present formulation of a simple conductive thermoplastic composite we term ‘carbomorph’ and demonstrate how it can be used in an unmodified low-cost 3D printer to print electronic sensors able to sense mechanical flexing and capacitance changes. We show how this capability can be used to produce custom sensing devices and user interface devices along with printed objects with embedded sensing capability. This advance in low-cost 3D printing with offer a new paradigm in the 3D printing field with printed sensors and electronics embedded inside 3D printed objects in a single build process without requiring complex or expensive materials incorporating additives such as carbon nanotubes

Community perceptions of health and chronic disease in South Indian rural transitional communities: A qualitative study

BACKGROUND: Chronic diseases are now the leading cause of death and disability worldwide; this epidemic has been linked to rapid economic growth and urbanisation in developing countries. Understanding how characteristics of the physical, social, and economic environment affect behaviour in the light of these changes is key to identifying successful interventions to mitigate chronic disease risk. DESIGN: We undertook a qualitative study consisting of nine focus group discussions (FGDs) (n=57) in five villages in rural Andhra Pradesh, South India, to understand people's perceptions of community development and urbanisation in relation to chronic disease in rural transitional communities. Specifically, we sought to understand perceptions of change linked to diet, physical activity, and pollution (because these exposures are most relevant to chronic diseases), with the aim of defining future interventions. The transcripts were analysed thematically. RESULTS: Participants believed their communities were currently less healthy, more polluted, less physically active, and had poorer access to nutritious food and shorter life expectancies than previously. There were contradictory perceptions of the effects of urbanisation on health within and between individuals; several of the participants felt their quality of life had been reduced. CONCLUSIONS: In the present study, residents viewed change and development within their villages as an inevitable and largely positive process but with some negative health consequences. Understanding how these changes are affecting populations in transitional rural areas and how people relate to their environment may be useful to guide community planning for health. Measures to educate and empower people to make healthy choices within their community may help reduce the spread of chronic disease risk factors in future years

'Suerte' (Luck): spirituality and well-being in El Alto, Bolivia.

This paper addresses the importance of faith and the consequent resort to supernatural forces to acquire a sense of well-being in a poor neighbourhood in the city of El Alto, Bolivia. Religious beliefs and practices have provided an important idiom for the expression of aspirations and the pursuit of ideals. The social role of emotions and its effect on well-being have been widely investigated in anthropology, especially in relation to issues of solidarity, feelings of confidence, and a sense of full personhood and empowerment (Barbalet 2001; Turner 2002; Bendelow and Williams 1997). The importance of faith is emphasised in my ethnography, showing how people’s loyalty to their notions of self-worth and the cosmological order is essential for their sense of fulfilment and empowerment. Thus, faith principles are fundamental to shed light on ideas of what people identify as well-being and fulfilment. My informants believe that luck can be controlled and changed by treating the spirits better. It can be bought and acquired by asking for protection from the spiritual forces living in the Bolivian plateau. Luck is inextricably connected with ideas of protection, destiny control and future aspirations. Bad luck is a moment of passage that leads to good luck. However, this is not a simple process. It requires a complex involvement of people, who carefully have to invest their time and money in changing their situation through various cultural practices of divination and control of destiny. Unless you are a breech baby, you are not born lucky, but you become so if you invest your resources in nourishing the forces that support the world. In exchange, these forces will assure and control an individual’s luck, freeing him/her from evil eye and envy-major sources of ill-being. This can be achieved through a ritual performed by a yatiri—local shaman, or other means, such as participating and dancing in a religious celebration in honour of a patron saint or engaging in regular acts of faith. The paper is based on ethnographic research carried out in Senkata, a poor neighbourhood in the city of El Alto, between November 2003 and November 2004. I spent 12 months in Bolivia in order to collect data for my Phd thesis. My methodology was mainly based on participant observation, informal conversations and a few formal interviews