A method includes detecting a change in connectivity information for a mobile device. The polyethylene microporous film manufactured according to the present invention may contribute to an increased productivity of stable products as its extrusion and stretching may be done readily. A first monochromator crystal can be positioned to intercept the first X-ray beam for producing a second X-ray beam. A plurality of receiving slots extend from the upper mating face to the lower mating face to communicate with corresponding receiving passages. According to the invention the swarf chamber is ground only partly and is otherwise unground.