The best of the rest from the Physics arXiv this week.
The rapidly evolving ecosystems associated with personal data is creating an entirely new field of scientific study, say computer scientists. And this requires a much more powerful ethics-based infrastructure.
Sentiment analysis is booming for blogs and tweets but more or less ignored when it comes to pictures. That looks set to change.
Google engineers have trained a machine-learning algorithm to write picture captions using the same techniques it developed for language translation.
With cryptography, surveillance processes could be open and preserve privacy without undermining their investigative power.
If you fancy trying your hand at radio astronomy, why not convert an old satellite dish.
As robots become ever more present in daily life, the question of how to control their behaviour naturally arises. Does Asimov have the answer?
The rise of big data techniques poses risks to society that call for new laws, a White House report concludes
The way players form into groups in online games reveals that hierarchies are an inevitable product of the human condition, say complexity scientists.