Abstract: A wireless device performs background scanning of one or more radio channels in a wireless network by sending a signal to one or more other devices connected to the wireless network that the device is entering a pre-defined hibernation mode. The background scanning is then performed whilst the other devices on the network consider the device to be in hibernation mode.

Abstract: A method for transmitting data using data packets includes dividing a data portion of the data packet into two or more data segments, each having a corresponding check portion. The data packet may also be communicated over two or more logical communication channels. The order of data portions in one communication channel may differ from the order of data portions in a second communication channel. Identical or different check portions may be assigned to respective data portions.

Abstract: Stack gases containing pollutant gases and particulate matter are passed through a defined flow path into which at least one selected liquid reagent is introduced in a prescribed manner to intimately contact the stack gases therein. The liquid reagent scrubs the stack gases and thereby removes a substantial portion of the pollutant gases and particulate matter therefrom. One reagent may be used or several different reagents may be employed at different stages of the flow path to best effect removal of various different pollutants contained within the stack gases. Removal of sulfur dioxide is accomplished by a highly reactive and substantially non-abrasive reagent, such as a lime solution and such solution further effects removal of materials in trace amounts in the stack gases such as mercury, bergillium and vanadium. Removal of nitric oxide and other materials in trace amounts is also accomplished by the process which includes as a reagent an oxidant.

Abstract: Stack gases containing pollutant gases and particulate matter are passed through a defined flow path into which at least one selected liquid reagent is introduced in a prescribed manner to intimately contact the stack gases therein. The liquid reagent scrubs the stack gases and thereby removes a substantial portion of the pollutant gases and particulate matter therefrom. One reagent may be used or several different reagents may be employed at different stages of the flow path to best effect removal of various different pollutants contained within the stack gases. Removal of sulfur dioxide is accomplished by a highly reactive and substantially non-abrasive reagent, such as a lime solution and such solution further effects removal of materials in trace amounts in the stack gases such as mercury, bergillium and vanadium. Removal of nitric oxide and other materials in trace amounts is also accomplished by the process which includes as a reagent an oxidant.

Abstract: Stack gases containing sulfur dioxide and other pollutant gases and particulate matter are passed through a horizontally extending chamber wherein the stack gases are sprayed by a liquid reagent. The liquid spray droplets move across the cross-sectional flow area of the stack gases and scrub the stack gases thereby removing a substantial portion of the pollutant gases and particulate matter therefrom. The resultant liquid slurry which might otherwise collect in the chamber is washed therefrom by the spray and drains downwardly from the chamber for discharge thereby preventing plugging of the chamber.