Abstract: The present invention relates to mechanical hair removal. In order to provide a handheld hair removal apparatus with improved detection of fine hair, a handheld hair removal apparatus (10) is provided that comprises a hair removal arrangement (12), a support structure (14) for supporting the hair removal arrangement, and a light source (16) attached to the support structure. During operation, a main movement direction (20) of the apparatus is provided. The hair removal arrangement comprises a skin contact portion (22) extending at least along a primary axis (24) extending perpendicularly to the main movement direction for contacting a user's skin during operation. Further, the light source can be arranged in an operational position (PO) at a side of the hair removal arrangement in front of the skin contact portion with respect to the main movement direction.

Abstract: An online system accesses a plurality of posts associated with a quality metric used to subsidize or penalize an associated bid amount when competing for presentation. Each of the plurality of posts receives a quality rating from a professional rating service. The professional quality rating is considered to be ground truth. A mathematical function is used to describe the relationship between the professional quality rating and the quality metric determined by the system. The plurality of posts is segmented into categories. Based on whether the categories of posts fall above or below the mathematical function by more than a threshold amount, the system identifies an unfair subsidy or penalty associated with the category of content and adjusts the associated quality metric accordingly.

Abstract: An online system receives a request to present a content item to a viewing user who is associated with a set of user attributes. The online system retrieves a regression model for predicting an expected quality for a particular content item and a particular set of users attributes. The regression model was trained, using machine learning, based on user-assigned quality scores, each corresponding to a content item and provided by a quality-assigning user, and sets of user attributes, each set associated with one of the quality-assigning users. The online system uses the regression model to predict a quality score, indicating the quality of a content item to the viewing user, based on the set of user attributes that is associated with the viewing user. The online system determines to provide the content to the viewing user based on the quality score, and transmits the content item to the viewing user.

Abstract: The present invention relates to mechanical hair removal. In order to provide a handheld hair removal apparatus with improved detection of fine hair, a handheld hair removal apparatus (10) is provided that comprises a hair removal arrangement (12), a support structure (14) for supporting the hair removal arrangement, and a light source (16) attached to the support structure. During operation, a main movement direction (20) of the apparatus is provided. The hair removal arrangement comprises a skin contact portion (22) extending at least along a primary axis (24) extending perpendicularly to the main movement direction for contacting a user's skin during operation. Further, the light source can be arranged in an operational position (PO) at a side of the hair removal arrangement in front of the skin contact portion with respect to the main movement direction.