30 research outputs found
Determinants of food retail outlet choice in an urban food environment: a qualitative study in Indonesia
No full textAbstract Background Urbanisation and food system transformations in low- and middle-income countries (LMICs) are reshaping local food retail environments, influencing diets and nutrition outcomes. The expansion of ultra-processed products (UPPs) and changing food outlet landscapes are key drivers of the triple burden of malnutrition across LMICs, including rising rates of obesity and related non-communicable disease (NCD). Yet, qualitative insights into how local communities interact with evolving food retail environments remains limited. Methods A qualitative study in three urban communities of Yogyakarta, Indonesia, between September 2018 and April 2019. A total of 45 semi-structured interviews lasting between 35 min and 1.5 h were conducted with individuals primarily responsible for household food purchasing and preparation, supported by transect walks to map food outlet types. Data were analysed iteratively, combining emic perspectives with pre-determined themes based on established urban food environments and food systems frameworks. Results Participants accessed a wide range of formal and informal food retail outlets. Food acquisition strategies were diverse and dynamic, with respondents often relying on multiple outlets for different product types. Five main themes emerged as key drivers of food retail outlet choice: economic reasons, convenience, produce quality, product variety, and personal or social relationships with vendors. Supermarkets were visited infrequently and mainly used for bulk or non-perishable purchases, while markets and other traditional outlets were preferred for daily needs due to perceived freshness, affordability, and trust in sellers. Conclusion Findings highlight the complexity of urban food acquisition in LMIC settings, where residents navigate diverse food retail options shaped by economic, social, and contextual factors. Informal vendors remain central to everyday food access across socio-economic groups, pointing to the need for context-specific public health policies and programmes that do not assume a linear transition toward formalisation, but instead work with existing informal structures. Interventions should aim to regulate the availability and marketing of UPPs, support healthier retail environments across all outlet types, and leverage trust, familiarity, and local networks in shaping dietary behaviours through bottom-up approaches
Dietary health perceptions and sources of nutritional knowledge in an urban food environment: a qualitative study from Indonesia
No full textUrbanisation, dietary change and socio-cultural drivers of nutritional behaviours in Indonesia
No full textUrbanisation, dietary change and traditional food practices in Indonesia:A longitudinal analysis
No full textThe nutrition transition hypothesis poses that as low-and-middle-income countries (LMICs) become wealthier and more urbanised, they experience a shift in dietary consumption towards ‘Western’ diets high in sugars, fats, animal-source foods, processed and packaged products. This paper uses panel data covering a period of 23 years to examine how changes in the urban environment relate to food expenditures, dietary diversity and traditional practices (food self-production and sharing) in Indonesia, a country that has experienced rapid economic growth and urbanisation over the last few decades. We first examine trends separately for urban and rural areas, and then use fixed effect models to examine whether changes in urban residence is associated with changes in food expenditures, traditional practices, and overall dietary diversity. Results show that, despite some increases in acquisitions of animal-source foods and of packaged and ready-made foods, budget allocations for other food groups has remained constant, and that changes have largely occurred in parallel across urban and rural areas. In turn, traditional diets high in cereal and plant products, as well as traditional food practices continue to be dominant in both rural and urban areas, despite the context of rapid socio-economic change and urbanisation. Fixed effect regression suggests that transition from rural to urban residence is not significantly associated with changes in food expenditures for any of the outcomes examined. On the other hand, there is some evidence that moving specifically to Jakarta is associated with some change towards ‘Western’ food preferences.</p
GaAs/Ge Solar Powered Aircraft
No full textUnmanned Aerial Vehicles (UAV) are being proposed for many applications for many applications including surveillance, mapping and atmospheric studies. These applications require a lightweight, low speed, medium to long duration aircraft. Due to the weight, speed, and altitude constraints imposed on such an aircraft, solar array generated electric power can be a viable alternative to air-breathing engines for certain missions. Development of such an aircraft is currently being funded under the Environmental Research Aircraft and Sensor Technology (ERAST) program. NASA Lewis Research Center (LeRC) has built a Solar Electric Airplane to demonstrate UAV technology. This aircraft utilizes high efficiency Applied Solar Energy Corporation (ASEC) GaAs/Ge space solar cells. The cells have been provided by the Air Force through the ManTech Office
Solar Powered Aircraft, Photovoltaic Array/Battery System Tabletop Demonstration: Design and Operation Manual
No full textA system was constructed to demonstrate the power system operation of a solar powered aircraft. The system consists of a photovoltaic (PV) array, a charge controller, a battery, an electric motor and propeller. The system collects energy from the PV array and either utilizes this energy to operate an electric motor or stores it in a rechargeable battery for future use. The system has a control panel which displays the output of the array and battery as well as the total current going to the electric motor. The control panel also has a means for adjusting the output to the motor to control its speed. The entire system is regulated around 12 VDC
