A sensor may be adapted to provide output to indicate when the sensor experiences abnormal forces or pressure. This active energy ray-curable conductive ink has good fluidity and enables to obtain a conductive circuit with low resistance after curing. The present techniques include a set of user selectable modes that enable key-frame extraction to be adapted to an underlying platform. When fastening, the object is inserted into an opening between one or several resilient clamping parts that are equipped with e. A rank is assigned to each cluster based on a cluster popularity score of the cluster and a category popularity score of the cluster’s representative category.