Abstract: A system and a method for creating a stable and reproducible interface of an optical sensor system for measuring blood glucose levels in biological tissue include a dual wedge prism sensor attached to a disposable optic that comprises a focusing lens and an optical window. The disposable optic adheres to the skin to allow a patient to take multiple readings or scans at the same location. The disposable optic includes a Petzval surface placed flush against the skin to maintain the focal point of the optical beam on the surface of the skin. Additionally, the integrity of the sensor signal is maximized by varying the rotation rates of the dual wedge prisms over time in relation to the depth scan rate of the sensor. Optimally, a medium may be injected between the disposable and the skin to match the respective refractive indices and optimize the signal collection of the sensor.

Abstract: A social networking system generates an advertisement, a recommended budget, and recommended targeting criteria for an object maintained by the social networking system for presentation to social networking system users. Information associated with the object by the social networking system is used to generate elements of the advertisement, the recommended budget, and the recommended targeting criteria. Different budgets, each associated with a predicted return on investment, may be determined, allowing an advertiser to select a budget based on the return the advertiser receives from presentation of the advertisement. Additionally, an advertiser may modify the recommended targeting criteria, recommended budget, or elements of the generated advertisement to customize presentation or distribution of the advertisement.

Abstract: A social networking system generates an advertisement, a recommended budget, and recommended targeting criteria for an object maintained by the social networking system for presentation to social networking system users. Information associated with the object by the social networking system is used to generate elements of the advertisement, the recommended budget, and the recommended targeting criteria. Different budgets, each associated with a predicted return on investment, may be determined, allowing an advertiser to select a budget based on the return the advertiser receives from presentation of the advertisement. Additionally, an advertiser may modify the recommended targeting criteria, recommended budget, or elements of the generated advertisement to customize presentation or distribution of the advertisement.