Distributed DNS in a wireless communication network comprising broadcasting by a first node a request message to a second node is disclosed. The weighted hydrodynamic head includes an integrally molded, conically-shaped or pyramid-shaped malleable body with a plurality of fins projecting laterally therefrom, a blunt leading edge, a trailing edge, a central passage extending from the leading edge to the trailing edge, and a slot formed in the side of the body and extending into the central passage. Furthermore, the stabilizer support comprises a knob through which a slide is made to vertically move inside the said body, the said feet being connected with the said slide. A dielectric layer is provided on the sidewalls of the upper portion of the capacitor to prevent shorting between the electrodes that can be caused by a conductive fence formed during processing. Various embodiments of the valveless pump include one or more of the airfoil elements mounted in one, the other or both of the inlet and outlet channels, including embodiments in which one or more cascades of the airfoil elements are mounted in the inlet channel and the outlet channel.