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A Ugandan inventor has won a major prize for a device which tests for malaria without drawing blood.Computer scientist Brian Gitta, 24, is the first Ugandan, and the youngest person, to win the Royal Academy of Engineering's Africa Prize.

Google has announced it is to open its first African artificial intelligence research centre in Ghana later this year. Google boss Sundar Pichai said the multi-national was “really looking forward” to opening the centre.

The Ghana subsidiary of the transportation network company, Uber is reported to have deactivated the accounts of 200 of its drivers who are below the age of 25. The drivers were told their appointments had to be terminated because they did not meet the required 25-years age limit required for drivers to operate commercial vehicles.

Japanese engineering researchers say they have created a tiny electronic light the size of a firefly which rides waves of ultrasound, and could eventually figure in applications ranging from moving displays to projection mapping.

Rangan Chatterjee is a GP and says he has seen plenty of evidence of the link between mental ill-health in youngsters and their use of social media. One 16 year-old boy was referred to him after he self-harmed and ended up in A&E.

"The first thought was to put him on anti-depressants but I chatted to him and it sounded like his use of social media was having a negative impact on his health."

So Dr Chatterjee suggested a simple solution - the teenager should attempt to wean himself off social media, restricting himself to just an hour before he went to bed. Over the course of a few weeks, he should extend this to two hours at night and two in the morning.

"He reported a significant improvement in his wellbeing and, after six months, I had a letter from his mother saying he was happier at school and integrated into the local community."

That and similar cases have led him to question the role social media plays in the lives of young people.

"Social media is having a negative impact on mental health," he said. "I do think it is a big problem and that we need some rules. How do we educate society to use technology so it helps us rather than harms us?"

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