A method of locating a moving element by determining a reference position and at least one overall protection limit on the basis of data from a group of satellites in a constellation of satellites. Accordingly, a feedback control circuit and a power converting circuit provided in an exemplary embodiment of the invention not only reduce the degree and the time of overshoot but also provide accurate and stable feedback control. High yield of TSV formation can be achieved by utilizing a substrate that embodies bulk micro defects at a density between 1e4cc and 1e7cc and having equivalent diameter less than 55 nm. Alternatively, at least one through opening is located in the base plate, a through opening via which during the manufacture of the airbag module at least one bar can be inserted, to stretch the airbag fastened to the base plate prior to folding the airbag. Surveys are further presented to users to obtain information related to the effectiveness of the advertising for both exposed users and control users. The fixing end has an outer surface and multiple corners formed on the outer surface of the fixing end and abutting the recesses.