http://www.sciencemag.org/news/2018/05/scientists-teach-beer-slinging-robots-produce-perfect-pour

As we pawn more and more jobs off on robots, there are a few you’d think we’d keep for ourselves, like beer taster. But brewers often need an automated way to ensure product quality, and a research team in Australia has developed a cheap method to help them. Their latest study assesses a freshly poured beer’s frothy top. Why focus on the bubbles? Because foam affects people’s enjoyment of beer and sparkling wine even more than taste and aroma do.

To gauge people’s reactions to beer foam, the researchers needed a consistent way to produce the foam, so they employed RoboBEER, a robot they’d previously built out of Lego pieces that pours beer from bottles into a glass. They showed videos of these robo-pours to people and asked them several questions about how they liked the height and stability of the foam, as well as the beer’s clarity and overall perceived quality. The goal was to be able to show people a video and predict these ratings without a long—or any—questionnaire, and without having to serve any actual beer, which slows the evaluation process even more.