Abstract: An approach is described of query processing via a lambda application including a batch processing layer and a speed processing layer. The approach may improve speed and efficiency with respect to computation of query results associated with the batch processing layer. A method pertaining to such approach may include receiving a query including an initial timeframe and computing partial query results within the initial timeframe. The partial query results within the initial timeframe may include a result for data associated with the speed processing layer and results for a first set of data segments associated with the batch processing layer. The method further may include combining the partial query results within the initial timeframe into a final query result. The method further may include computing partial query results outside of the initial timeframe including results for a second set of data segments associated with the batch processing layer.

Abstract: A device and method for post event data retrieval uses an electronic communications system, wherein the method and system can utilize a detection device for detecting the event and facilitating the post event data retrieval. The system and method include detecting an event using a detection device. The detection device includes a location tool configured to determine a position of the detection device. The detection device defines a specified vicinity with respect to itself. A location is determined of the detection device using the location tool, after the event has occurred. Data including an identification (ID) is automatically requested of a communications device in the specified vicinity, using the detection device. A reply is received by the detection device which includes the ID from the communications device for identifying the communications device.