Abstract: Rotors for devices such as wind turbines have one or more blades that each include a first airfoil, and a second airfoil positioned proximate the first airfoil so that the first and second airfoils interact aerodynamically during rotation of the rotor. The first airfoil can be configured to pivot so that its angle of attack remains approximately zero.

Abstract: A method and a system for finding products in an in-store shopping environment using an interactive shopping game is described. In an example, the shopping game is generated based on user input, including a shopping list and user personalization information. For example, the interactive shopping game is presented to a user on a portable electronic device to guide the user to find items in the in-store shopping environment.

Abstract: Embodiments are directed towards inferring an online matching profile based on progressively receiving a prospect's inputs. Access to other matching profiles is provided to the prospect, and while viewing such profiles of other participants, the prospect may progressively provide inputs, such that the prospect's profile may be inferred. As the prospect continues viewing and progressively providing additional inputs, a number of compatibility metrics presented to the prospect may be increased, as does a degree of compatibility of matches that may be suggested to the prospect. At any time during the viewing and progressive input process, the prospect may be presented with their inferred profile. The prospect may then accept and/or modify various elements within the inferred profile.

Abstract: Embodiments are directed towards enabling generation of visual search criteria using visual elements for at least within an online dating context. A friend creates a dream date avatar for an intended search result recipient by combining one or more visual search criteria. The dream date avatar embodying the visual search criteria may be sent to other friends, each of which may then modify the search criteria by visually modifying the dream date avatar. Each time a modified dream date avatar is sent over a network, a new search may be performed, with the subsequent search results being sent to the intended search result recipient. The intended recipient may also modify the dream date avatar using visual search criteria resulting in another search to be performed. Moreover, the intended recipient may terminate one or more of the searches to minimize a likelihood of being spammed.

Abstract: Embodiments are directed towards inferring an online matching profile based on progressively receiving a prospect's inputs. Access to other matching profiles is provided to the prospect, and while viewing such profiles of other participants, the prospect may progressively provide inputs, such that the prospect's profile may be inferred. As the prospect continues viewing and progressively providing additional inputs, a number of compatibility metrics presented to the prospect may be increased, as does a degree of compatibility of matches that may be suggested to the prospect. At any time during the viewing and progressive input process, the prospect may be presented with their inferred profile. The prospect may then accept and/or modify various elements within the inferred profile.