 From BOA Learning English, this is the Technology Report in Special English. More than 700 business leaders, government officials and investors gathered in Mountain View, California. They were attending the Third Annual Social Innovation Summit. Landmark Ventures, a financial advisory company, organized the event in December. It was a conference aimed at finding new ways to deal with some old problems, like traffic. Vehicle traffic is an issue that student entrepreneur Christian Brugerman hopes to solve. His team, Graphmasters, received a Microsoft Imagine Cup grant of $100,000. The German team won the prize for its NUNAV Traffic Management System. Here is how it works. Drivers using the system send their current position and destination to the system's computer servers every 30 seconds. With that information, the central system can reroute all of the cars in a way that everyone gets his individual best possible route. Christian Brugerman says tests suggest that using such a system could save up to 20% on fuel consumption and up to 50% on time spent in traffic. A team from Uganda was also invited to the Social Innovation Summit. Team Cipher 256 has developed a mobile app to improve health care for pregnant women in Africa, where maternal and infant mortality rates are extremely high. The mobile app is called Winsanga. It measures fetal heart sounds to help establish the heart rate, age, and position of the fetus in the mother. Cipher 256 leader, Erin Tushabe, says the device is similar to medical tests that are costly. Team Cipher 256 also received a Microsoft Imagine Cup grant to help continue their project. For VOA Learning English, I'm Carolyn Presuti.