TOTAL HARMONIC DISTORTION OF A PIEZOELECTRIC MEMS LOUDSPEAKER IN AN IEC 60318-4 COUPLER ESTIMATION USING STATIC MEASUREMENTS AND A NONLINEAR STATE SPACE MODEL

We propose a method to evaluate the Total Harmonic Distortion generated by a cantilever-based PZT loudspeaker inside an IEC 60318-4 coupler.The model is validated using experimental data of a commercial loudspeaker.Using the time domain equations of the equivalent electrical circuit of the loudspeaker inside the coupler and a state space formulatio

The fouling behavior of a steam generator (SG) tube was investigated at different positions after 500 h of immersion in high-temperature water.A triple-layer structure of fouling appeared at both the crevice position and the free span position, namely, the large, dispersedly distributed deposition layer on the top; the small and faceted Carrying Ca

One of the most important indicators in malaria eradication is the malaria surveillance information system (SISMAL) for recording and reporting medical cases.This paper aims to describe the availability and readiness of SISMALs at primary health centers (PHCs) in Indonesia.A cross-sectional survey was implemented in seven provinces for this study.T

Despite extensive research efforts focusing on tackling Leather Patch Hat membrane biofouling, one of the biggest problems associated with membrane technology, there has been little headway in this area.This study presents novel polyethersulfone (PES) membranes synthesized via a phase inversion method at incremental loadings of functionalized oxidi