Internet

Mobile access won't fix the digital divide

Mobile services have had an important and positive impact on developing countries where they are the main means of connecting to the internet. However, mobile services have capacity constraints. They use limited radio frequency ...

Energy & Green Tech

Li-ion batteries: Science 'directly into your hand'

They are omnipresent and essential to navigating modern life. Small, light, rechargeable: lithium ion batteries have revolutionised our world in less than three decades.

Electronics & Semiconductors

Fujitsu triples the output power of gallium-nitride transistors

Fujitsu Limited and Fujitsu Laboratories Ltd. today announced that they have developed a crystal structure that both increases current and voltage in gallium-nitride (GaN) high electron mobility transistors (HEMT), effectively ...

page 4 from 4