The invention relates to the use of at least one ionic liquid or of a mixture of ionic liquids as a detergent for the cleaning of articles with a compressed gas. The method also includes generating a logic zero at a source of the transistor by electrically connecting the source of the transistor to a ground line with the first conductor. 48 obtained by using a CuK\u03b1 line as an X-ray source. A method of heating the gas sensor includes disposing the two thermistor elements in an electrically parallel configuration over a surface of the substrate and passing an electric current through the elements. A member searching and analyzing method of social network is also disclosed.