A developer container includes: a developer accommodating chamber, provided with an opening, for accommodating a developer; a sealing member bonded to the developer accommodating container so as to block the opening; and a rotatable member, having a connecting surface where the sealing member is connected thereto, for peeling off the sealing member from the opening by rotation thereof. Syringe assemblies according to one aspect of the present invention include a plunger rod and a syringe barrel that incorporate one or more pulsing elements on the plunger rod or barrel that are rotatable to create pulsatile movement or continuous and unimpeded movement a plunger rod within a syringe barrel. Dopant ions are implanted at a first angle with respect to the normal of the top surface of the semiconductor fin to dope the first sidewall surface and the top surface. A gap-filling material is applied on the substrate filling the at least one opening. The method also provides for automatic transition from the acquisition mode to the tracking mode when an acceptable target is found. During the optical measurement an audio recording is generated by means of a microphone and at least one speech sequence spoken by a user is recorded.