Abstract: At least one listing is retrieved based on a search query, the query including at least one parameter associated with an element of a hierarchical index A determination of a normalized click-through rate for each of the at least one listings is made, the normalized click-through rate for a listing being based on a click-through rate for the listing that is adjusted according to one or more positions in which the listing has been displayed in each of a plurality of sets of search results. A determination is made of a position for the at least one listing in a set of search results based at least in part on an aggregation of the aggregate normalized click-through rates associated with at least one level of a hierarchical index.

Abstract: A nonvolatile EEPROM cell having a double poly arrangement provides stored data without sense amplifiers, thereby reducing power requirements. The EEPROM cell has a floating gate in a first poly layer, and a control gate overlapping the floating gate in a second poly layer. This configuration allows for an area-efficient layout that is easily shrinkable as compared to prior art memory cells. In addition, stacking the control and floating gates results in higher capacitive coupling. The EEPROM cell also includes an access gate, a tunnel capacitor, and at least one inverter. In some embodiments, the EEPROM cell can be advantageously used to configure programmable logic without need for a conloading step.