Robot learns to feed folks dinner

The lack of access to healthy food has always been a problem for the financially unstable. Food stamps can now be used to buy fresh produce at farmers markets, but greater success could be achieved by getting grocery stores involved.

With child obesity on the rise, public school students have lacked the motivation and access to eat healthy food. Different programs around the country aim to improve student diet in public schools, including Real Eats for Academics and Life in Los Angeles and Cornell’s Smarter Lunchrooms Movement, by emailing nutrition report cards to parents, presenting the healthy food with aesthetic pleasure, and the arrangement of the food for access.

PrePex, a new nonsurgical circumcision tool, could revolutionize the prevention of H.I.V. and AIDS in sub-Saharan Africa. Cheap and easy to assemble, the device has proven successful in several randomized trials.

The Jaipur Limb organization based in India has developed prostheses at low cost, and services are free for the poor. The organization’s efforts have recently spread to other countries with impoverished people. Jaipur Limb reaches patients through branch clinics, traveling workshops, and limb camps in cities around the world.

A prosthetist from Texas visiting Jaipur Limb workshops in Honduras saw problems with their low-cost prosthetics - the issue wasn't the design of the leg, but the technicians at the Honduras workshops were people completely new to prosthetics who were given just eight weeks of training. Thanks to his research, Jaipur established a research and development unit to improve the limb.

In an agricultural system designed for big-industrial growers, many farmers struggle to bridge the relationship between their produce and consumers, as well as strengthening local economies. The food hub is a collection of buildings that process and distribute the sale of local food. Eastern Market in Detroit is an example of a food hub that makes local produce accessible to low-income neighborhoods.

America is the world’s main supplier of food aid to impoverished countries; however, food aid has the problems of long-distance transportation, the cost of the transportation and storage, and the navigation through dangerous zones. Different programs around the world are experimenting with alternative forms of aid, including vouchers and cash for work.

Asian cities are over-crowded and many residences are kitchenless, causing families with children to consume unhealthy food from the street vendors. Mercy Corps, a non-profit organization that advocates nutrition, has initiated some for-profit businesses in Jakarta that provide healthy food to underserved neighborhoods. The food carts are marketed at serving poor children a healthy meal.

The San Francisco Unified School District is piloting a collaboration with the design firm IDEO to re-imagine the school food system and help combat childhood obesity by better designing the space and the experience of how children eat, as much as the type of food they consume.

Two columns on how Iran is treating its massive epidemic of injecting drug use by tackling it as a health problem, effectively lowering H.I.V. rates among drug users using an approach to drugs known as harm reduction.