Author: The Conversation

While many people love colorful photos of landscapes, flowers or rainbows, some biomedical researchers treasure vivid images on a much smaller scale – as tiny as one-thousandth the width of a human hair. To study the micro world and help advance medical knowledge and treatments, these scientists use fluorescent nano-sized particles. Quantum dots are one type of nanoparticle, more commonly known for their use in TV screens. They’re super tiny crystals that can transport electrons. When UV light hits these semiconducting particles, they can emit light of various colors. One nanometer is one-millionth of a millimeter. RNGS Reuters/Nanosys That fluorescence allows…

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Reports of Facebook moderators’ appalling working conditions have been making headlines worldwide. Workers say they are burning out as they moderate vast flows of violent content under pressure, with vague, ever-changing guidelines. They describe unclean, dangerous contractor workplaces. Moderators battle depression, addiction, and even post-traumatic stress disorder from the endless parade of horrors they consume.

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Today, improving urban services through digital transformation is a huge industry, dominated by the likes of Cisco and IBM. But the idea of a “smart city” encompasses more than the clever application of technology in urban areas. That technology must also contribute to making cities more sustainable, and improving the quality of life for the people who live there.

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