Abstract: A microelectromechanical systems (MEMS) device and a light assembly that includes the MEMS device. The MEMS device includes a first arm, a second arm, at least one permanent magnet, a fan structure, and a coil. The first arm has a first arm first end and a first arm second end. The second arm is coupled to, and is spaced apart from, the first arm and has a second arm first end and a second arm second end. The at least one permanent magnet is coupled to the first arm second end. The fan structure is coupled to, and extends in cantilever manner from, the second arm second end and includes a connection end and a free end. The coil is disposed on or within the fan structure. When the coil is electrically energized, a Lorentz force is generated that causes the fan structure to vibrate relative to the permanent magnet.

Abstract: Systems and methods are provided to evaluate a search engine using search results retrieved from a plurality of different search engines. For example, a controller can randomly distribute a set of pre-formulated queries to a plurality of computers to query the search engines at random times to obtain search results and combine the search results to evaluate the completeness of a query result provided by a particular search engine. The controller may simulate the random queries from users using a set of computers and may reduce the burden on the search engines by spreading out the query activities over a period of time, such as a month.

Abstract: Systems and methods are provided to evaluate a search engine using search results retrieved from a plurality of different search engines. For example, a controller can randomly distribute a set of pre-formulated queries to a plurality of computers to query the search engines at random times to obtain search results and combine the search results to evaluate the completeness of a query result provided by a particular search engine. The controller may simulate the random queries from users using a set of computers and may reduce the burden on the search engines by spreading out the query activities over a period of time, such as a month.