Social scientist Kasley Killam has always been fascinated by the science of human connection. In college, for instance, she once decided to conduct a personal experiment and perform an act of kindness everyday for 108 days. At the Harvard T.H. Chan School of Public Health, she researched solutions for loneliness. At Google's health spinoff, Verily, her job was to bring people together to promote social health. "I first came across the term'social health' during my research at Stanford, where I was developing an app around human connection," Killam says.

Image Retrieval is commonly evaluated with Average Precision (AP) or Recall@k. Yet, those metrics, are limited to binary labels and do not take into account errors' severity. This paper introduces a new hierarchical AP training method for pertinent image retrieval (HAP-PIER). HAPPIER is based on a new H-AP metric, which leverages a concept hierarchy to refine AP by integrating errors' importance and better evaluate rankings. To train deep models with H-AP, we carefully study the problem's structure and design a smooth lower bound surrogate combined with a clustering loss that ensures consistent ordering. Extensive experiments on 6 datasets show that HAPPIER significantly outperforms state-of-the-art methods for hierarchical retrieval, while being on par with the latest approaches when evaluating fine-grained ranking performances. Finally, we show that HAPPIER leads to better organization of the embedding space, and prevents most severe failure cases of non-hierarchical methods. Our code is publicly available at: https://github.com/elias-ramzi/HAPPIER.

Billie Eilish dropped behind-the-scenes footage from her special concert, "Happier than Ever: A Love Letter to Los Angeles," detailing how she made an animated segment for the event. The concert premiered on Disney Plus on Sept. 3. The 19-year-old singer took to Instagram Story on Sunday to share an impressive video that she recorded on June 25. During the special concert, there were animated sequences shown for a brief period to convey images like bleeding and driving a car. In the video, the singer could be seen wearing a black and red motion capture suit and taking a selfie video to flaunt the entire setup.

While the Maroon 5 singer was courting controversy for his Super Bowl half-time show on Sunday, video game fans were revelling in the afterglow of a different live performance. "Millions attended" a concert on Saturday starring masked DJ Marshmello, who played a set including 2018 hits Everyday and Happier. The concert was entirely virtual, briefly turning Fortnite from third-person shooter into music venue. The first ever live virtual concert inside of @fortnite with millions of people in attendance. So insane, thank you epic games and everyone who made this possible!