A subject of the present invention is to provide a door handle device capable of controlling its openingclosing action by using a piezoelectric sensor that has a flexible structure and can attain an enough sensitivity even by a light touch, and a keyless entry system having the same. The pin and the socket have engagement surfaces with the pin or socket having another surface that forms a wedging surface for the device. The user terminal comprises a transmitter configured to transmit the request to transmit frame when the transmit timer expires or when the uplink data present in the transmit buffer exceeds a threshold amount. Additionally disclosed are transformation vectors comprising said DNA sequences. While making this determination, the system can additionally consider correlations between words in a title or an anchor of a document and words in the document as well as word-form scores for pairs of words in the documents.