Power electronics based zonal dc power distribution systems are being considered for future Navy ships. The stability of dc power electronics based power distribution systems, and in particular dc systems, is a significant design consideration because of the potential for negative impedance induced instabilities. In this paper, methodologies for analyzing the stability of these systems are revi...

A switched capacitor circuit which simulates Frequency Dependant Negative Resistor is proposed. The circuit is controlled by three phases clock and needs one unity gain buffer. A comparison among SC FDNRs in other references is shown. SWITCAP simulation of SC filter using these circuits are also shown. Key-Words; Switched-Capacitor(SC) Frequency Dependant Negative Resistor(FDNR) Filter immittan...

INTRODUCTION  The use of conventional tympanometry is not sufficiently sensitive to detect all cases of middle ear changes, and this hinders accurate diagnosis. OBJECTIVE  To characterize acoustic immittance measures of infants from 0 to 3 months of age using multifrequency tympanometry in a prospective study. METHOD  54 infants from 0 to 3 months of age were evaluated. The inclusion criter...

This paper examines methods that can be adopted in early stage or retrofit design of actuator subsystems, and is motivated by the modern trend toward retrofitting legacy hydraulic actuation of submarine control surfaces with electromechanical systems. This problem highlights the familiar need designers have to relate system response requirements to selected subsystems to enable focused developm...