Abstract: A device for cleaning air, particularly outdoors, includes at least one housing (2) having at least one air inlet (3), filter means (4, 5), at least one fan (6), and at least one air outlet (8, 108, 208). The device is inexpensive and easy to use, and enables the user to remove pollutants from air at arbitrary times at arbitrary location because the device is transportable and implemented for positioning at different installation sites. The device may include transport means (11), particularly a chassis (11) having wheels (12). An arrangement may include a plurality of devices for cleaning air, and a software-based application, particularly a smartphone application, may be used for controlling the plurality of devices for cleaning air.

Abstract: A system for delivering advanced natural language interaction applications, comprising a dialog interface module, a natural language interaction engine, a solution data repository component operating comprising at least one domain model, at least one language model, and a plurality of flow elements and rules for managing interactions with users, and an interface software module. Upon receipt of a request from a user via a network, the dialog interface module preprocesses the request and transmits it to the natural language interaction engine. The natural language interaction engine interprets the request using a plurality of language recognition rules stored in the solution data repository, and based at least determined semantic meaning or user intent, the natural language interaction engine forms an appropriate response and delivers the response to the user via the dialog module, or takes an appropriate action based on the request.