Abstract: Devices and techniques are generally described for ranking of search results. In some examples, a query may be received. A first ranked list of content items may be determined for the query ranked based on a first optimization objective. A second ranked list of the content items may be determined for the query ranked based on a second optimization objective. A first rank product may be determined for a first content item based at least in part on multiplication of a rank of the first content item in the first ranked list with a rank of the first content item in the second ranked list. A third ranked list of the content items may be determined based at least in part on the first rank product. At least a portion of the third ranked list of the content items may be displayed on a display.

Abstract: A method of determining functional brain connectivity and its application as a biomarker is presented. Brain activity signals are measured to detect a functional connection between a first region of a brain and a second region of said brain. The direction of the functional connection is determined by determining whether said first region excites or inhibits the second region more strongly than the second region excites or inhibits the first region. The functional connectivity is then used as a biomarker to predict the existence of a condition, such as epilepsy or autism. The functional connection may be measured while said brain is in a resting state.